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New image decoder

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boreddevnl 2026-03-08 19:23:22 +01:00
parent 032b154f41
commit 3fbcf3d4fd
43 changed files with 582 additions and 2754 deletions
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Makefile
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@ -17,9 +17,7 @@ ISO_DIR = iso_root
KERNEL_ELF = $(BUILD_DIR)/boredos.elf KERNEL_ELF = $(BUILD_DIR)/boredos.elf
ISO_IMAGE = boredos.iso ISO_IMAGE = boredos.iso
# Exclude old network stack files C_SOURCES = $(wildcard $(SRC_DIR)/*.c) \
OLD_NET_SOURCES = $(SRC_DIR)/dns.c $(SRC_DIR)/http.c $(SRC_DIR)/icmp.c $(SRC_DIR)/tcp.c
C_SOURCES = $(filter-out $(OLD_NET_SOURCES), $(wildcard $(SRC_DIR)/*.c)) \
$(wildcard $(SRC_DIR)/lwip/core/*.c) \ $(wildcard $(SRC_DIR)/lwip/core/*.c) \
$(wildcard $(SRC_DIR)/lwip/core/ipv4/*.c) \ $(wildcard $(SRC_DIR)/lwip/core/ipv4/*.c) \
$(SRC_DIR)/lwip/netif/ethernet.c \ $(SRC_DIR)/lwip/netif/ethernet.c \
@ -39,7 +37,6 @@ LDFLAGS = -m elf_x86_64 -nostdlib -static -pie --no-dynamic-linker \
NASMFLAGS = -f elf64 NASMFLAGS = -f elf64
# Limine Version
LIMINE_VERSION = 10.8.2 LIMINE_VERSION = 10.8.2
LIMINE_URL_BASE = https://github.com/limine-bootloader/limine/raw/v$(LIMINE_VERSION) LIMINE_URL_BASE = https://github.com/limine-bootloader/limine/raw/v$(LIMINE_VERSION)
@ -47,12 +44,10 @@ LIMINE_URL_BASE = https://github.com/limine-bootloader/limine/raw/v$(LIMINE_VERS
all: $(ISO_IMAGE) all: $(ISO_IMAGE)
# Ensure build directories exist
$(BUILD_DIR): $(BUILD_DIR):
mkdir -p $(BUILD_DIR) mkdir -p $(BUILD_DIR)
mkdir -p $(BUILD_DIR) mkdir -p $(BUILD_DIR)
# Download Limine Binaries via Git
limine-setup: limine-setup:
@if [ ! -f limine/limine-bios.sys ]; then \ @if [ ! -f limine/limine-bios.sys ]; then \
echo "Limine binaries missing or invalid. Cloning v$(LIMINE_VERSION)-binary..."; \ echo "Limine binaries missing or invalid. Cloning v$(LIMINE_VERSION)-binary..."; \
@ -66,18 +61,15 @@ limine-setup:
@echo "Building Limine host utility..."; \ @echo "Building Limine host utility..."; \
$(MAKE) -C limine $(MAKE) -C limine
# Compile C Sources
$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c | $(BUILD_DIR) limine-setup $(BUILD_DIR)/%.o: $(SRC_DIR)/%.c | $(BUILD_DIR) limine-setup
mkdir -p $(dir $@) mkdir -p $(dir $@)
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@
# Assemble ASM Sources
$(BUILD_DIR)/%.o: $(SRC_DIR)/%.asm | $(BUILD_DIR) $(BUILD_DIR)/%.o: $(SRC_DIR)/%.asm | $(BUILD_DIR)
$(NASM) $(NASMFLAGS) $< -o $@ $(NASM) $(NASMFLAGS) $< -o $@
# Assemble test files specifically if they get missed
$(BUILD_DIR)/test_syscall.o: $(SRC_DIR)/test_syscall.asm | $(BUILD_DIR) $(BUILD_DIR)/test_syscall.o: $(SRC_DIR)/test_syscall.asm | $(BUILD_DIR)
$(NASM) $(NASMFLAGS) $< -o $@ $(NASM) $(NASMFLAGS) $< -o $@
@ -87,20 +79,16 @@ $(BUILD_DIR)/user_test.o: $(SRC_DIR)/user_test.asm | $(BUILD_DIR)
$(BUILD_DIR)/process_asm.o: $(SRC_DIR)/process_asm.asm | $(BUILD_DIR) $(BUILD_DIR)/process_asm.o: $(SRC_DIR)/process_asm.asm | $(BUILD_DIR)
$(NASM) $(NASMFLAGS) $< -o $@ $(NASM) $(NASMFLAGS) $< -o $@
# Link Kernel
$(KERNEL_ELF): $(OBJ_FILES) $(KERNEL_ELF): $(OBJ_FILES)
$(LD) $(LDFLAGS) -o $@ $(OBJ_FILES) $(LD) $(LDFLAGS) -o $@ $(OBJ_FILES)
$(MAKE) -C $(SRC_DIR)/userland $(MAKE) -C $(SRC_DIR)/userland
# Create ISO
$(ISO_IMAGE): $(KERNEL_ELF) limine.conf limine-setup $(ISO_IMAGE): $(KERNEL_ELF) limine.conf limine-setup
rm -rf $(ISO_DIR) rm -rf $(ISO_DIR)
mkdir -p $(ISO_DIR) mkdir -p $(ISO_DIR)
mkdir -p $(ISO_DIR)/EFI/BOOT mkdir -p $(ISO_DIR)/EFI/BOOT
# Copy Kernel and Config
cp $(KERNEL_ELF) $(ISO_DIR)/ cp $(KERNEL_ELF) $(ISO_DIR)/
# Build ISO limine.conf natively with modules
cp limine.conf $(ISO_DIR)/ cp limine.conf $(ISO_DIR)/
mkdir -p $(ISO_DIR)/bin mkdir -p $(ISO_DIR)/bin
@for f in $(SRC_DIR)/userland/bin/*.elf; do \ @for f in $(SRC_DIR)/userland/bin/*.elf; do \
@ -111,7 +99,6 @@ $(ISO_IMAGE): $(KERNEL_ELF) limine.conf limine-setup
fi \ fi \
done done
# Copy README and WAD
@if [ -f README.md ]; then cp README.md $(ISO_DIR)/; fi @if [ -f README.md ]; then cp README.md $(ISO_DIR)/; fi
@if [ -f $(SRC_DIR)/userland/doom/doom1.wad ]; then \ @if [ -f $(SRC_DIR)/userland/doom/doom1.wad ]; then \
mkdir -p $(ISO_DIR)/Library/DOOM; \ mkdir -p $(ISO_DIR)/Library/DOOM; \
@ -119,7 +106,6 @@ $(ISO_IMAGE): $(KERNEL_ELF) limine.conf limine-setup
echo " module_path: boot():/Library/DOOM/doom1.wad" >> $(ISO_DIR)/limine.conf; \ echo " module_path: boot():/Library/DOOM/doom1.wad" >> $(ISO_DIR)/limine.conf; \
fi fi
# Copy Wallpapers
mkdir -p $(ISO_DIR)/Library/images/Wallpapers mkdir -p $(ISO_DIR)/Library/images/Wallpapers
@for f in $(SRC_DIR)/images/wallpapers/*.jpg; do \ @for f in $(SRC_DIR)/images/wallpapers/*.jpg; do \
if [ -f "$$f" ]; then \ if [ -f "$$f" ]; then \
@ -130,16 +116,22 @@ $(ISO_IMAGE): $(KERNEL_ELF) limine.conf limine-setup
done done
@if [ -f splash.jpg ]; then cp splash.jpg $(ISO_DIR)/; fi @if [ -f splash.jpg ]; then cp splash.jpg $(ISO_DIR)/; fi
# Copy Limine Bootloader Files (flat structure in binary branch) mkdir -p $(ISO_DIR)/Library/images/gif
@for f in $(SRC_DIR)/images/gif/*.gif; do \
if [ -f "$$f" ]; then \
basename=$$(basename "$$f"); \
cp "$$f" $(ISO_DIR)/Library/images/gif/; \
echo " module_path: boot():/Library/images/gif/$$basename" >> $(ISO_DIR)/limine.conf; \
fi \
done
cp limine/limine-bios.sys $(ISO_DIR)/ cp limine/limine-bios.sys $(ISO_DIR)/
cp limine/limine-bios-cd.bin $(ISO_DIR)/ cp limine/limine-bios-cd.bin $(ISO_DIR)/
cp limine/limine-uefi-cd.bin $(ISO_DIR)/ cp limine/limine-uefi-cd.bin $(ISO_DIR)/
# Create EFI Boot Files
cp limine/BOOTX64.EFI $(ISO_DIR)/EFI/BOOT/ cp limine/BOOTX64.EFI $(ISO_DIR)/EFI/BOOT/
cp limine/BOOTIA32.EFI $(ISO_DIR)/EFI/BOOT/ cp limine/BOOTIA32.EFI $(ISO_DIR)/EFI/BOOT/
# Copy Fonts
mkdir -p $(ISO_DIR)/Library/Fonts mkdir -p $(ISO_DIR)/Library/Fonts
@for f in $(SRC_DIR)/fonts/*.ttf; do \ @for f in $(SRC_DIR)/fonts/*.ttf; do \
if [ -f "$$f" ]; then \ if [ -f "$$f" ]; then \
@ -149,14 +141,12 @@ $(ISO_IMAGE): $(KERNEL_ELF) limine.conf limine-setup
fi \ fi \
done done
# Generate ISO $(XORRISO) -as mkisofs -R -J -b limine-bios-cd.bin \
$(XORRISO) -as mkisofs -b limine-bios-cd.bin \
-no-emul-boot -boot-load-size 4 -boot-info-table \ -no-emul-boot -boot-load-size 4 -boot-info-table \
--efi-boot limine-uefi-cd.bin \ --efi-boot limine-uefi-cd.bin \
-efi-boot-part --efi-boot-image --protective-msdos-label \ -efi-boot-part --efi-boot-image --protective-msdos-label \
$(ISO_DIR) -o $(ISO_IMAGE) $(ISO_DIR) -o $(ISO_IMAGE)
# Install Limine to ISO (for BIOS boot)
./limine/limine bios-install $(ISO_IMAGE) ./limine/limine bios-install $(ISO_IMAGE)
clean: clean:

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src/kernel/dns.c
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@ -1,137 +0,0 @@
// Copyright (c) 2023-2026 Chris (boreddevnl)
// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
// This header needs to maintain in any file it is present in, as per the GPL license terms.
#include "net_defs.h"
#include "cmd.h"
#include "memory_manager.h"
static ipv4_address_t dns_result_ip;
static bool dns_resolved = false;
void dns_handle_response(void *data, uint16_t len) {
(void)len;
dns_header_t *dns = (dns_header_t*)data;
if ((ntohs(dns->flags) & 0x8000) == 0) return; // Not a response
// Skip queries
uint8_t *p = (uint8_t*)(dns + 1);
for(int i=0; i<ntohs(dns->q_count); i++) {
while(*p != 0) p += (*p) + 1; // Skip name
p += 5; // Skip null + type + class
}
// Parse Answers
for(int i=0; i<ntohs(dns->ans_count); i++) {
// Name (pointer or label)
if ((*p & 0xC0) == 0xC0) p += 2;
else while(*p != 0) p += (*p) + 1;
uint16_t type = ntohs(*(uint16_t*)p); p += 2;
uint16_t class = ntohs(*(uint16_t*)p); p += 2;
uint32_t ttl = ntohl(*(uint32_t*)p); p += 4;
uint16_t dlen = ntohs(*(uint16_t*)p); p += 2;
(void)class;
(void)ttl;
if (type == 1 && dlen == 4) { // A Record
dns_result_ip.bytes[0] = p[0];
dns_result_ip.bytes[1] = p[1];
dns_result_ip.bytes[2] = p[2];
dns_result_ip.bytes[3] = p[3];
dns_resolved = true;
return;
}
p += dlen;
}
}
// Callback wrapper for the network stack
static void dns_udp_callback(const ipv4_address_t* src_ip, uint16_t src_port, const mac_address_t* src_mac, const void* data, size_t length) {
(void)src_ip; (void)src_port; (void)src_mac;
dns_handle_response((void*)data, (uint16_t)length);
}
ipv4_address_t dns_resolve(const char *hostname) {
dns_resolved = false;
dns_result_ip.bytes[0] = 0;
if (!network_is_initialized()) {
cmd_write("Error: Network not initialized. Run 'netinit' first.\n");
return dns_result_ip;
}
// Register callback
extern int udp_register_callback(uint16_t port, void (*callback)(const ipv4_address_t*, uint16_t, const mac_address_t*, const void*, size_t));
udp_register_callback(5353, dns_udp_callback);
// Construct Query
uint8_t buf[512];
dns_header_t *dns = (dns_header_t*)buf;
dns->id = htons(0x1234);
dns->flags = htons(0x0100); // Standard query
dns->q_count = htons(1);
dns->ans_count = 0;
dns->auth_count = 0;
dns->add_count = 0;
uint8_t *p = buf + sizeof(dns_header_t);
const char *h = hostname;
while (*h) {
const char *next = h;
while (*next && *next != '.') next++;
*p++ = (uint8_t)(next - h);
for(int i=0; i<(next-h); i++) *p++ = h[i];
h = next;
if (*h == '.') h++;
}
*p++ = 0; // End of name
*(uint16_t*)p = htons(1); p += 2; // Type A
*(uint16_t*)p = htons(1); p += 2; // Class IN
// Use DHCP provided DNS if available, otherwise fallback to Google
ipv4_address_t dns_server = get_dns_server_ip();
if (dns_server.bytes[0] == 0) {
dns_server.bytes[0] = 8; dns_server.bytes[1] = 8;
dns_server.bytes[2] = 8; dns_server.bytes[3] = 8;
}
extern int udp_send_packet(const ipv4_address_t *dest, uint16_t dest_port, uint16_t src_port, const void *data, size_t len);
// Retry loop to handle ARP resolution delay
for (int i = 0; i < 3 && !dns_resolved; i++) {
udp_send_packet(&dns_server, 53, 5353, buf, p - buf);
// Wait loop
int timeout = 20000000;
while (!dns_resolved && timeout-- > 0) {
extern void network_process_frames(void);
network_process_frames();
}
}
return dns_result_ip;
}
void cli_cmd_dns(char *args) {
if (!args || !*args) {
cmd_write("Usage: dns <hostname>\n");
return;
}
cmd_write("Resolving ");
cmd_write(args);
cmd_write("...\n");
ipv4_address_t ip = dns_resolve(args);
if (ip.bytes[0] == 0 && ip.bytes[1] == 0) {
cmd_write("Resolution failed.\n");
} else {
cmd_write("IP: ");
cmd_write_int(ip.bytes[0]); cmd_write(".");
cmd_write_int(ip.bytes[1]); cmd_write(".");
cmd_write_int(ip.bytes[2]); cmd_write(".");
cmd_write_int(ip.bytes[3]); cmd_write("\n");
}
}

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src/kernel/explorer.c
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@ -135,6 +135,15 @@ static bool explorer_str_ends_with(const char *str, const char *suffix) {
return explorer_strcmp(str + str_len - suf_len, suffix) == 0; return explorer_strcmp(str + str_len - suf_len, suffix) == 0;
} }
// Helper to check if file is an image supported by stb_image
static bool explorer_is_image_file(const char *filename) {
return explorer_str_ends_with(filename, ".jpg") || explorer_str_ends_with(filename, ".JPG") ||
explorer_str_ends_with(filename, ".png") || explorer_str_ends_with(filename, ".PNG") ||
explorer_str_ends_with(filename, ".gif") || explorer_str_ends_with(filename, ".GIF") ||
explorer_str_ends_with(filename, ".bmp") || explorer_str_ends_with(filename, ".BMP") ||
explorer_str_ends_with(filename, ".tga") || explorer_str_ends_with(filename, ".TGA");
}
// Helper for label drawing (adapted from wm.c) // Helper for label drawing (adapted from wm.c)
static void explorer_draw_icon_label(int x, int y, const char *label, uint32_t color) { static void explorer_draw_icon_label(int x, int y, const char *label, uint32_t color) {
char line1[11] = {0}; // 10 chars + null char line1[11] = {0}; // 10 chars + null
@ -815,7 +824,7 @@ static void explorer_open_target(const char *path) {
process_create_elf("A:/bin/markdown.elf", path); process_create_elf("A:/bin/markdown.elf", path);
} else if (explorer_str_ends_with(path, ".pnt")) { } else if (explorer_str_ends_with(path, ".pnt")) {
process_create_elf("A:/bin/paint.elf", path); process_create_elf("A:/bin/paint.elf", path);
} else if (explorer_str_ends_with(path, ".jpg") || explorer_str_ends_with(path, ".JPG")) { } else if (explorer_is_image_file(path)) {
process_create_elf("A:/bin/viewer.elf", path); process_create_elf("A:/bin/viewer.elf", path);
} else { } else {
process_create_elf("A:/bin/txtedit.elf", path); process_create_elf("A:/bin/txtedit.elf", path);
@ -901,7 +910,7 @@ static void explorer_draw_file_icon(int x, int y, bool is_dir, uint32_t color, c
else draw_icon(x + 5, y + 5, ""); else draw_icon(x + 5, y + 5, "");
} else if (explorer_str_ends_with(filename, ".pnt")) { } else if (explorer_str_ends_with(filename, ".pnt")) {
draw_paint_icon(x + 5, y + 5, ""); draw_paint_icon(x + 5, y + 5, "");
} else if (explorer_str_ends_with(filename, ".jpg") || explorer_str_ends_with(filename, ".JPG")) { } else if (explorer_is_image_file(filename)) {
// Build full path for thumbnail loading // Build full path for thumbnail loading
char full_path[FAT32_MAX_PATH]; char full_path[FAT32_MAX_PATH];
explorer_strcpy(full_path, current_path); explorer_strcpy(full_path, current_path);

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src/kernel/http.c
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@ -1,59 +0,0 @@
// Copyright (c) 2023-2026 Chris (boreddevnl)
// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
// This header needs to maintain in any file it is present in, as per the GPL license terms.
#include "net_defs.h"
#include "cmd.h"
void cli_cmd_httpget(char *args) {
if (!args || !*args) {
cmd_write("Usage: httpget <hostname>\n");
return;
}
cmd_write("Resolving host...\n");
ipv4_address_t ip = dns_resolve(args);
if (ip.bytes[0] == 0 && ip.bytes[1] == 0) {
cmd_write("DNS Resolution failed.\n");
return;
}
cmd_write("Connecting to ");
cmd_write_int(ip.bytes[0]); cmd_write(".");
cmd_write_int(ip.bytes[1]); cmd_write(".");
cmd_write_int(ip.bytes[2]); cmd_write(".");
cmd_write_int(ip.bytes[3]); cmd_write("...\n");
tcp_socket_t *sock = tcp_connect(ip, 80);
if (!sock) {
cmd_write("Connection failed.\n");
return;
}
cmd_write("Sending Request...\n");
// Construct request
tcp_send(sock, "GET / HTTP/1.1\r\nHost: ", 0);
tcp_send(sock, args, 0);
tcp_send(sock, "\r\nConnection: close\r\n\r\n", 0);
cmd_write("Waiting for response...\n");
// Wait for data (simple delay loop for demo)
for(volatile int i=0; i<200000000; i++) {
extern void network_process_frames(void);
network_process_frames();
}
char buf[1024];
int len = tcp_read(sock, buf, 1023);
if (len > 0) {
buf[len] = 0;
cmd_write("\n--- Response ---\n");
cmd_write(buf);
cmd_write("\n----------------\n");
} else {
cmd_write("No data received.\n");
}
tcp_close(sock);
}

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@ -1,153 +0,0 @@
// Copyright (c) 2023-2026 Chris (boreddevnl)
// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
// This header needs to maintain in any file it is present in, as per the GPL license terms.
#include "net_defs.h"
#include "cmd.h"
#include "memory_manager.h"
#include "wm.h"
static volatile bool ping_reply_received = false;
static uint16_t ping_id_counter = 0;
static uint16_t current_ping_id = 0;
static bool is_pinging = false;
void icmp_handle_packet(ipv4_address_t src, void *data, uint16_t len) {
icmp_header_t *icmp = (icmp_header_t *)data;
if (icmp->type == 0 && is_pinging && ntohs(icmp->id) == current_ping_id) { // Echo Reply
ping_reply_received = true;
// Simple output
cmd_write("Reply from ");
cmd_write_int(src.bytes[0]); cmd_write(".");
cmd_write_int(src.bytes[1]); cmd_write(".");
cmd_write_int(src.bytes[2]); cmd_write(".");
cmd_write_int(src.bytes[3]);
cmd_write(": bytes=");
cmd_write_int(len - sizeof(icmp_header_t));
cmd_write(" seq=");
cmd_write_int(ntohs(icmp->sequence));
cmd_write("\n");
}
}
void cli_cmd_ping(char *args) {
if (!args || !*args) {
cmd_write("Usage: ping <ip>\n");
return;
}
// Parse IP (Simplified)
ipv4_address_t dest;
int ip_parts[4];
const char *p = args;
for(int i=0; i<4; i++) {
ip_parts[i] = 0;
while(*p >= '0' && *p <= '9') {
ip_parts[i] = ip_parts[i]*10 + (*p - '0');
p++;
}
if(*p == '.') p++;
dest.bytes[i] = (uint8_t)ip_parts[i];
}
cmd_write("Pinging...\n");
is_pinging = true;
const int payload_size = 8;
uint8_t packet[sizeof(icmp_header_t) + payload_size];
icmp_header_t *icmp = (icmp_header_t *)packet;
for (int i = 0; i < 4; i++) {
current_ping_id = ++ping_id_counter;
icmp->type = 8; // Echo Request
icmp->code = 0;
icmp->id = htons(current_ping_id);
icmp->sequence = htons(i + 1);
icmp->checksum = 0;
// Fill payload
for (int j = 0; j < payload_size; j++) {
packet[sizeof(icmp_header_t) + j] = (uint8_t)('a' + (j % 26));
}
icmp->checksum = net_checksum(packet, sizeof(packet));
ping_reply_received = false;
ip_send_packet(dest, IP_PROTO_ICMP, packet, sizeof(packet));
uint32_t start_ticks = wm_get_ticks();
while (!ping_reply_received && (wm_get_ticks() - start_ticks) < 180) { // 3 seconds timeout
network_process_frames();
}
if (!ping_reply_received) {
cmd_write("Request timed out. (Did you run 'netinit'?)\n");
} else if (i < 3) {
// Wait a bit before next ping
uint32_t wait_start = wm_get_ticks();
while ((wm_get_ticks() - wait_start) < 60) {
network_process_frames();
}
}
}
is_pinging = false;
}
// Syscall version of ping for userland - returns success/failure
int cli_cmd_ping_syscall(ipv4_address_t *dest) {
if (!dest) return -1;
// Check if network is initialized
if (!network_is_initialized()) {
return -2; // Network not initialized
}
ipv4_address_t dest_ip = *dest;
is_pinging = true;
const int payload_size = 8;
uint8_t packet[sizeof(icmp_header_t) + payload_size];
icmp_header_t *icmp = (icmp_header_t *)packet;
int success_count = 0;
for (int i = 0; i < 4; i++) {
current_ping_id = ++ping_id_counter;
icmp->type = 8; // Echo Request
icmp->code = 0;
icmp->id = htons(current_ping_id);
icmp->sequence = htons(i + 1);
icmp->checksum = 0;
// Fill payload
for (int j = 0; j < payload_size; j++) {
packet[sizeof(icmp_header_t) + j] = (uint8_t)('a' + (j % 26));
}
icmp->checksum = net_checksum(packet, sizeof(packet));
ping_reply_received = false;
ip_send_packet(dest_ip, IP_PROTO_ICMP, packet, sizeof(packet));
uint32_t start_ticks = wm_get_ticks();
while (!ping_reply_received && (wm_get_ticks() - start_ticks) < 180) { // 3 seconds timeout
network_process_frames();
}
if (ping_reply_received) {
success_count++;
}
if (i < 3) {
// Wait a bit before next ping
uint32_t wait_start = wm_get_ticks();
while ((wm_get_ticks() - wait_start) < 60) {
network_process_frames();
}
}
}
is_pinging = false;
// Return number of successful replies
return success_count;
}

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16
src/kernel/interrupts.asm
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@ -41,6 +41,10 @@ isr%2_wrapper:
push r14 push r14
push r15 push r15
; Save SSE/FPU state
sub rsp, 512
fxsave [rsp]
; Pass current RSP as 1st argument (registers_t*) ; Pass current RSP as 1st argument (registers_t*)
mov rdi, rsp mov rdi, rsp
@ -49,6 +53,10 @@ isr%2_wrapper:
; Update RSP with return value (task switch) ; Update RSP with return value (task switch)
mov rsp, rax mov rsp, rax
; Restore SSE/FPU state
fxrstor [rsp]
add rsp, 512
pop r15 pop r15
pop r14 pop r14
pop r13 pop r13
@ -146,6 +154,10 @@ exception_common:
push r14 push r14
push r15 push r15
; Save SSE/FPU state
sub rsp, 512
fxsave [rsp]
; Pass current RSP as 1st argument (registers_t*) ; Pass current RSP as 1st argument (registers_t*)
mov rdi, rsp mov rdi, rsp
@ -154,6 +166,10 @@ exception_common:
; Switch stack if needed (for process termination) ; Switch stack if needed (for process termination)
mov rsp, rax mov rsp, rax
; Restore SSE/FPU state
fxrstor [rsp]
add rsp, 512
; Restore registers ; Restore registers
pop r15 pop r15
pop r14 pop r14

1
src/kernel/main.c
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@ -155,6 +155,7 @@ void kmain(void) {
fat32_mkdir("/Library"); fat32_mkdir("/Library");
fat32_mkdir("/Library/images"); fat32_mkdir("/Library/images");
fat32_mkdir("/Library/images/Wallpapers"); fat32_mkdir("/Library/images/Wallpapers");
fat32_mkdir("/Library/images/gif");
fat32_mkdir("/Library/Fonts"); fat32_mkdir("/Library/Fonts");
fat32_mkdir("/Library/DOOM"); fat32_mkdir("/Library/DOOM");

968
src/kernel/nanojpeg.c
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@ -1,968 +0,0 @@
// NanoJPEG -- KeyJ's Tiny Baseline JPEG Decoder
// version 1.3 (2012-03-05)
// by Martin J. Fiedler <martin.fiedler@gmx.net>
//
// This software is published under the terms of KeyJ's Research License,
// version 0.2. Usage of this software is subject to the following conditions:
// 0. There's no warranty whatsoever. The author(s) of this software can not
// be held liable for any damages that occur when using this software.
// 1. This software may be used freely for both non-commercial and commercial
// purposes.
// 2. This software may be redistributed freely as long as no fees are charged
// for the distribution and this license information is included.
// 3. This software may be modified freely except for this license information,
// which must not be changed in any way.
// 4. If anything other than configuration, indentation or comments have been
// altered in the code, the original author(s) must receive a copy of the
// modified code.
///////////////////////////////////////////////////////////////////////////////
// DOCUMENTATION SECTION //
// read this if you want to know what this is all about //
///////////////////////////////////////////////////////////////////////////////
// INTRODUCTION
// ============
//
// This is a minimal decoder for baseline JPEG images. It accepts memory dumps
// of JPEG files as input and generates either 8-bit grayscale or packed 24-bit
// RGB images as output. It does not parse JFIF or Exif headers; all JPEG files
// are assumed to be either grayscale or YCbCr. CMYK or other color spaces are
// not supported. All YCbCr subsampling schemes with power-of-two ratios are
// supported, as are restart intervals. Progressive or lossless JPEG is not
// supported.
// Summed up, NanoJPEG should be able to decode all images from digital cameras
// and most common forms of other non-progressive JPEG images.
// The decoder is not optimized for speed, it's optimized for simplicity and
// small code. Image quality should be at a reasonable level. A bicubic chroma
// upsampling filter ensures that subsampled YCbCr images are rendered in
// decent quality. The decoder is not meant to deal with broken JPEG files in
// a graceful manner; if anything is wrong with the bitstream, decoding will
// simply fail.
// The code should work with every modern C compiler without problems and
// should not emit any warnings. It uses only (at least) 32-bit integer
// arithmetic and is supposed to be endianness independent and 64-bit clean.
// However, it is not thread-safe.
// COMPILE-TIME CONFIGURATION
// ==========================
//
// The following aspects of NanoJPEG can be controlled with preprocessor
// defines:
//
// _NJ_EXAMPLE_PROGRAM = Compile a main() function with an example
// program.
// _NJ_INCLUDE_HEADER_ONLY = Don't compile anything, just act as a header
// file for NanoJPEG. Example:
// #define _NJ_INCLUDE_HEADER_ONLY
// #include "nanojpeg.c"
// int main(void) {
// njInit();
// // your code here
// njDone();
// }
// NJ_USE_LIBC=1 = Use the malloc(), free(), memset() and memcpy()
// functions from the standard C library (default).
// NJ_USE_LIBC=0 = Don't use the standard C library. In this mode,
// external functions njAlloc(), njFreeMem(),
// njFillMem() and njCopyMem() need to be defined
// and implemented somewhere.
// NJ_USE_WIN32=0 = Normal mode (default).
// NJ_USE_WIN32=1 = If compiling with MSVC for Win32 and
// NJ_USE_LIBC=0, NanoJPEG will use its own
// implementations of the required C library
// functions (default if compiling with MSVC and
// NJ_USE_LIBC=0).
// NJ_CHROMA_FILTER=1 = Use the bicubic chroma upsampling filter
// (default). // 图像resize的一种算法
// NJ_CHROMA_FILTER=0 = Use simple pixel repetition for chroma upsampling
// (bad quality, but faster and less code).
// API
// ===
//
// For API documentation, read the "header section" below.
// EXAMPLE
// =======
//
// A few pages below, you can find an example program that uses NanoJPEG to
// convert JPEG files into PGM or PPM. To compile it, use something like
// gcc -O3 -D_NJ_EXAMPLE_PROGRAM -o nanojpeg nanojpeg.c
// You may also add -std=c99 -Wall -Wextra -pedantic -Werror, if you want :)
///////////////////////////////////////////////////////////////////////////////
// HEADER SECTION //
// copy and pase this into nanojpeg.h if you want //
///////////////////////////////////////////////////////////////////////////////
#ifndef _NANOJPEG_H
#define _NANOJPEG_H
// nj_result_t: Result codes for njDecode().
typedef enum _nj_result {
NJ_OK = 0, // no error, decoding successful
NJ_NO_JPEG, // not a JPEG file
NJ_UNSUPPORTED, // unsupported format
NJ_OUT_OF_MEM, // out of memory
NJ_INTERNAL_ERR, // internal error
NJ_SYNTAX_ERROR, // syntax error
__NJ_FINISHED, // used internally, will never be reported
} nj_result_t;
// njInit: Initialize NanoJPEG.
// For safety reasons, this should be called at least one time before using
// using any of the other NanoJPEG functions.
void njInit(void);
// njDecode: Decode a JPEG image.
// Decodes a memory dump of a JPEG file into internal buffers.
// Parameters:
// jpeg = The pointer to the memory dump.
// size = The size of the JPEG file.
// Return value: The error code in case of failure, or NJ_OK (zero) on success.
nj_result_t njDecode(const void* jpeg, const int size);
// njGetWidth: Return the width (in pixels) of the most recently decoded
// image. If njDecode() failed, the result of njGetWidth() is undefined.
int njGetWidth(void);
// njGetHeight: Return the height (in pixels) of the most recently decoded
// image. If njDecode() failed, the result of njGetHeight() is undefined.
int njGetHeight(void);
// njIsColor: Return 1 if the most recently decoded image is a color image
// (RGB) or 0 if it is a grayscale image. If njDecode() failed, the result
// of njGetWidth() is undefined.
int njIsColor(void);
// njGetImage: Returns the decoded image data.
// Returns a pointer to the most recently image. The memory layout it byte-
// oriented, top-down, without any padding between lines. Pixels of color
// images will be stored as three consecutive bytes for the red, green and
// blue channels. This data format is thus compatible with the PGM or PPM
// file formats and the OpenGL texture formats GL_LUMINANCE8 or GL_RGB8.
// If njDecode() failed, the result of njGetImage() is undefined.
unsigned char* njGetImage(void);
// njGetImageSize: Returns the size (in bytes) of the image data returned
// by njGetImage(). If njDecode() failed, the result of njGetImageSize() is
// undefined.
int njGetImageSize(void);
// njDone: Uninitialize NanoJPEG.
// Resets NanoJPEG's internal state and frees all memory that has been
// allocated at run-time by NanoJPEG. It is still possible to decode another
// image after a njDone() call.
void njDone(void);
#endif//_NANOJPEG_H
///////////////////////////////////////////////////////////////////////////////
// CONFIGURATION SECTION //
// adjust the default settings for the NJ_ defines here //
///////////////////////////////////////////////////////////////////////////////
#ifndef NJ_USE_LIBC
#define NJ_USE_LIBC 0
#endif
#ifndef NJ_USE_WIN32
#ifdef _MSC_VER
#define NJ_USE_WIN32 (!NJ_USE_LIBC)
#else
#define NJ_USE_WIN32 0
#endif
#endif
#ifndef NJ_CHROMA_FILTER
#define NJ_CHROMA_FILTER 1
#endif
///////////////////////////////////////////////////////////////////////////////
// EXAMPLE PROGRAM //
// just define _NJ_EXAMPLE_PROGRAM to compile this (requires NJ_USE_LIBC) //
///////////////////////////////////////////////////////////////////////////////
#ifdef _NJ_EXAMPLE_PROGRAM
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char* argv[]) {
int size;
char *buf;
FILE *f;
if (argc < 2) {
printf("Usage: %s <input.jpg> [<output.ppm>]\n", argv[0]);
return 2;
}
f = fopen(argv[1], "rb");
if (!f) {
printf("Error opening the input file.\n");
return 1;
}
fseek(f, 0, SEEK_END);
size = (int) ftell(f); // 字节
buf = malloc(size);
fseek(f, 0, SEEK_SET);
size = (int) fread(buf, 1, size, f); // 读取整个文件内容到buf
fclose(f);
njInit(); // 初始化nj_context_t
if (njDecode(buf, size)) {
printf("Error decoding the input file.\n");
return 1;
}
f = fopen((argc > 2) ? argv[2] : (njIsColor() ? "nanojpeg_out.ppm" : "nanojpeg_out.pgm"), "wb");
if (!f) {
printf("Error opening the output file.\n");
return 1;
}
fprintf(f, "P%d\n%d %d\n255\n", njIsColor() ? 6 : 5, njGetWidth(), njGetHeight());
fwrite(njGetImage(), 1, njGetImageSize(), f);
fclose(f);
njDone();
return 0;
}
#endif
// 解释什么是stride http://msdn.microsoft.com/en-us/library/windows/desktop/aa473780(v=vs.85).aspx
///////////////////////////////////////////////////////////////////////////////
// IMPLEMENTATION SECTION //
// you may stop reading here //
///////////////////////////////////////////////////////////////////////////////
#ifndef _NJ_INCLUDE_HEADER_ONLY
#include <stddef.h> // For NULL in freestanding mode
#ifdef _MSC_VER
#define NJ_INLINE static __inline
#define NJ_FORCE_INLINE static __forceinline
#else
#define NJ_INLINE static inline
#define NJ_FORCE_INLINE static inline
#endif
#if NJ_USE_LIBC
#include <stdlib.h>
#include <string.h>
#define njAllocMem malloc
#define njFreeMem free
#define njFillMem memset
#define njCopyMem memcpy
#elif NJ_USE_WIN32
#include <windows.h>
#define njAllocMem(size) ((void*) LocalAlloc(LMEM_FIXED, (SIZE_T)(size)))
#define njFreeMem(block) ((void) LocalFree((HLOCAL) block))
NJ_INLINE void njFillMem(void* block, unsigned char value, int count) { __asm {
mov edi, block
mov al, value
mov ecx, count
rep stosb
} }
NJ_INLINE void njCopyMem(void* dest, const void* src, int count) { __asm {
mov edi, dest
mov esi, src
mov ecx, count
rep movsb
} }
#else
extern void* njAllocMem(int size);
extern void njFreeMem(void* block);
extern void njFillMem(void* block, unsigned char byte, int size);
extern void njCopyMem(void* dest, const void* src, int size);
#endif
typedef struct _nj_code {
unsigned char bits, code;
} nj_vlc_code_t;
typedef struct _nj_cmp {
int cid;
int ssx, ssy; // 水平/垂直因子
int width, height;
int stride;
int qtsel; // Quantization Table量化表
int actabsel, dctabsel; // AC/DC Huffman Table
int dcpred; // DC prediction
unsigned char *pixels;
} nj_component_t; // 颜色分量
typedef struct _nj_ctx {
nj_result_t error;
const unsigned char *pos; // 待解码数据指针(按字节来)
int size; // 整个数据的长度
int length; // 某一个marker内容的长度
int width, height; // 图片宽和高度
int mbwidth, mbheight; // MCU水平/垂直个数
int mbsizex, mbsizey; // MCU宽/高
int ncomp; // 颜色分量数
nj_component_t comp[3]; // YCbCr
int qtused, qtavail; // 这两个目前看不出来很大用处
unsigned char qtab[4][64]; // 但是目前似乎只有2个
nj_vlc_code_t vlctab[4][65536]; // 构造所有16位数的Huffman基数
// 目前基本上是4个(直/交/0/1)
int buf, bufbits; // 这是用来做什么的 buf是存放内容的 bufbits是计数器，存放了多少个bits
int block[64];
int rstinterval;
unsigned char *rgb; // 解析出来的RGB所要占用的内存 // 每1个点包含3个字节，按找RGB的顺序
} nj_context_t;
static nj_context_t nj;
static const char njZZ[64] = { 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18,
11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28, 35,
42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45,
38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63 };
/*
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31
32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47
48 49 50 51 52 53 54 55
56 57 58 59 60 61 62 63
*/
NJ_FORCE_INLINE unsigned char njClip(const int x) { // 限定范围是0 ~ 255之间
return (x < 0) ? 0 : ((x > 0xFF) ? 0xFF : (unsigned char) x);
}
#define W1 2841
#define W2 2676
#define W3 2408
#define W5 1609
#define W6 1108
#define W7 565
NJ_INLINE void njRowIDCT(int* blk) { // 按行来操作的 0 ~ 7 // 8 ~ 15
int x0, x1, x2, x3, x4, x5, x6, x7, x8;
if (!((x1 = blk[4] << 11)
| (x2 = blk[6])
| (x3 = blk[2])
| (x4 = blk[1])
| (x5 = blk[7])
| (x6 = blk[5])
| (x7 = blk[3])))
{
blk[0] = blk[1] = blk[2] = blk[3] = blk[4] = blk[5] = blk[6] = blk[7] = blk[0] << 3;
return;
}
x0 = (blk[0] << 11) + 128;
x8 = W7 * (x4 + x5);
x4 = x8 + (W1 - W7) * x4;
x5 = x8 - (W1 + W7) * x5;
x8 = W3 * (x6 + x7);
x6 = x8 - (W3 - W5) * x6;
x7 = x8 - (W3 + W5) * x7;
x8 = x0 + x1;
x0 -= x1;
x1 = W6 * (x3 + x2);
x2 = x1 - (W2 + W6) * x2;
x3 = x1 + (W2 - W6) * x3;
x1 = x4 + x6;
x4 -= x6;
x6 = x5 + x7;
x5 -= x7;
x7 = x8 + x3;
x8 -= x3;
x3 = x0 + x2;
x0 -= x2;
x2 = (181 * (x4 + x5) + 128) >> 8;
x4 = (181 * (x4 - x5) + 128) >> 8;
blk[0] = (x7 + x1) >> 8;
blk[1] = (x3 + x2) >> 8;
blk[2] = (x0 + x4) >> 8;
blk[3] = (x8 + x6) >> 8;
blk[4] = (x8 - x6) >> 8;
blk[5] = (x0 - x4) >> 8;
blk[6] = (x3 - x2) >> 8;
blk[7] = (x7 - x1) >> 8;
}
NJ_INLINE void njColIDCT(const int* blk, unsigned char *out, int stride) {
int x0, x1, x2, x3, x4, x5, x6, x7, x8;
if (!((x1 = blk[8*4] << 8)
| (x2 = blk[8*6])
| (x3 = blk[8*2])
| (x4 = blk[8*1])
| (x5 = blk[8*7])
| (x6 = blk[8*5])
| (x7 = blk[8*3])))
{
x1 = njClip(((blk[0] + 32) >> 6) + 128);
for (x0 = 8; x0; --x0) {
*out = (unsigned char) x1;
out += stride;
}
return;
}
x0 = (blk[0] << 8) + 8192;
x8 = W7 * (x4 + x5) + 4;
x4 = (x8 + (W1 - W7) * x4) >> 3;
x5 = (x8 - (W1 + W7) * x5) >> 3;
x8 = W3 * (x6 + x7) + 4;
x6 = (x8 - (W3 - W5) * x6) >> 3;
x7 = (x8 - (W3 + W5) * x7) >> 3;
x8 = x0 + x1;
x0 -= x1;
x1 = W6 * (x3 + x2) + 4;
x2 = (x1 - (W2 + W6) * x2) >> 3;
x3 = (x1 + (W2 - W6) * x3) >> 3;
x1 = x4 + x6;
x4 -= x6;
x6 = x5 + x7;
x5 -= x7;
x7 = x8 + x3;
x8 -= x3;
x3 = x0 + x2;
x0 -= x2;
x2 = (181 * (x4 + x5) + 128) >> 8; // Y，Cb和Cr的值都范围都是-128 ~ 127，并且在FDCT的时候有先减去128，所以现在要IDCT之后再加上128
x4 = (181 * (x4 - x5) + 128) >> 8;
*out = njClip(((x7 + x1) >> 14) + 128); out += stride;
*out = njClip(((x3 + x2) >> 14) + 128); out += stride;
*out = njClip(((x0 + x4) >> 14) + 128); out += stride;
*out = njClip(((x8 + x6) >> 14) + 128); out += stride;
*out = njClip(((x8 - x6) >> 14) + 128); out += stride;
*out = njClip(((x0 - x4) >> 14) + 128); out += stride;
*out = njClip(((x3 - x2) >> 14) + 128); out += stride;
*out = njClip(((x7 - x1) >> 14) + 128);
}
#define njThrow(e) do { nj.error = e; return; } while (0)
#define njCheckError() do { if (nj.error) return; } while (0)
static int njShowBits(int bits) { // 能放得下大于32位的值么？
unsigned char newbyte;
if (!bits) return 0;
while (nj.bufbits < bits) { // 也就是说要buf的位数小于已经buf的位数的时候，就直接读出来？
if (nj.size <= 0) {
nj.buf = (nj.buf << 8) | 0xFF;
nj.bufbits += 8;
continue;
}
newbyte = *nj.pos++; // 数据指针是按字节
nj.size--;
nj.bufbits += 8;
nj.buf = (nj.buf << 8) | newbyte; // 高位最终会被覆盖掉，比如我要buf一个64位的值怎么办？
if (newbyte == 0xFF) {
if (nj.size) {
unsigned char marker = *nj.pos++;
nj.size--;
switch (marker) {
case 0x00:
case 0xFF:
break;
case 0xD9: nj.size = 0; break;
default:
if ((marker & 0xF8) != 0xD0)
nj.error = NJ_SYNTAX_ERROR;
else {
nj.buf = (nj.buf << 8) | marker;
nj.bufbits += 8;
}
}
} else
nj.error = NJ_SYNTAX_ERROR;
}
}
return (nj.buf >> (nj.bufbits - bits)) & ((1 << bits) - 1);
}
NJ_INLINE void njSkipBits(int bits) {
if (nj.bufbits < bits)
(void) njShowBits(bits);
nj.bufbits -= bits;
}
NJ_INLINE int njGetBits(int bits) {
int res = njShowBits(bits);
njSkipBits(bits);
return res;
}
NJ_INLINE void njByteAlign(void) {
nj.bufbits &= 0xF8; // (1111 1000)8的倍数，不满8的部分丢弃
}
static void njSkip(int count) {
nj.pos += count; // 数据指针增加
nj.size -= count; // 总体数据大小减去count
nj.length -= count; // 当前marker长度减去count
if (nj.size < 0) nj.error = NJ_SYNTAX_ERROR;
}
NJ_INLINE unsigned short njDecode16(const unsigned char *pos) {
return (pos[0] << 8) | pos[1]; // 00000000 00001101
}
static void njDecodeLength(void) { // decode长度字段，这个方法调用一般都是已经进入到特定的marker之后
if (nj.size < 2) njThrow(NJ_SYNTAX_ERROR);
nj.length = njDecode16(nj.pos); // 该marker的长度(除去marker名字所占用的2个字节)
if (nj.length > nj.size) njThrow(NJ_SYNTAX_ERROR);
njSkip(2);
}
NJ_INLINE void njSkipMarker(void) {
njDecodeLength();
njSkip(nj.length);
}
NJ_INLINE void njDecodeSOF(void) { // 解析Start of Frame的时候就会把所需要的内存都分配好
int i, ssxmax = 0, ssymax = 0;
nj_component_t* c;
njDecodeLength(); // 解析长度并移动数据指针
if (nj.length < 9) njThrow(NJ_SYNTAX_ERROR);
if (nj.pos[0] != 8) njThrow(NJ_UNSUPPORTED); // 样本精度，一般都是8
nj.height = njDecode16(nj.pos + 1); // 图片高度/宽度
nj.width = njDecode16(nj.pos + 3);
nj.ncomp = nj.pos[5]; // 颜色分量数据，一般都是3
njSkip(6); // 之前共6个字节数据，所以移动数据指针6个字节
switch (nj.ncomp) { // 目前只支持1和3这两种
case 1:
case 3:
break;
default:
njThrow(NJ_UNSUPPORTED);
}
if (nj.length < (nj.ncomp * 3)) njThrow(NJ_SYNTAX_ERROR); // 数据量肯定是要大于颜色分量数 multiply 3，因为接着存颜色分量信息的每个结构占3个字节
// 颜色分量ID占用1个字节，水平/垂直因子占用1个字节(高4位水平，低4位垂直)，量化表占用1个字节
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) {
c->cid = nj.pos[0]; // 颜色分量ID
if (!(c->ssx = nj.pos[1] >> 4)) njThrow(NJ_SYNTAX_ERROR); // 高4位(水平因子)
if (c->ssx & (c->ssx - 1)) njThrow(NJ_UNSUPPORTED); // non-power of two
if (!(c->ssy = nj.pos[1] & 15)) njThrow(NJ_SYNTAX_ERROR); // (00001111)低4位(垂直因子)
if (c->ssy & (c->ssy - 1)) njThrow(NJ_UNSUPPORTED); // non-power of two
if ((c->qtsel = nj.pos[2]) & 0xFC) njThrow(NJ_SYNTAX_ERROR); // (11111101) 这里0xFC是用在这里干什么的？
njSkip(3); // 移动数据指针到下一个颜色分量
nj.qtused |= 1 << c->qtsel; // 这里是做什么用的？看不出来
if (c->ssx > ssxmax) ssxmax = c->ssx; // 记录最大水平因子
if (c->ssy > ssymax) ssymax = c->ssy; // 记录最大垂直因子
}
if (nj.ncomp == 1) { // 只有一种颜色分量的时候就简单啦
c = nj.comp;
c->ssx = c->ssy = ssxmax = ssymax = 1;
}
nj.mbsizex = ssxmax << 3; // MCU宽 是 水平采样因子最大值 multiply 8
nj.mbsizey = ssymax << 3; // MCU高 是 垂直采样因子最大值 multiply 8
nj.mbwidth = (nj.width + nj.mbsizex - 1) / nj.mbsizex; // 分子采用+ nj.mbsizex - 1就取到大于但是最接近(等于)宽度的值，
// 并且这个值是MCU宽度整数倍 // 这里是水平方向MCU的个数
nj.mbheight = (nj.height + nj.mbsizey - 1) / nj.mbsizey; // 这里是垂直方向MCU的个数
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) {
c->width = (nj.width * c->ssx + ssxmax - 1) / ssxmax; // 采样宽度？ 最大水平/垂直因子的值就是图片原来的值，否则就会根据因子做相应的减少
c->stride = (c->width + 7) & 0x7FFFFFF8; // (0111 1111 1111 1111 1111 1111 1111 1000) 做什么？以1234567结尾的都省略掉？
// 变成8的整数
// 补齐8位，注意前面有加7，所以总是不会比原来的少，比如原来是227，那么这里就会变成232
// 这是按照数据单元计算的，所以不对
c->height = (nj.height * c->ssy + ssymax - 1) / ssymax;
c->stride = nj.mbwidth * nj.mbsizex * c->ssx / ssxmax; // 再计算一遍stride有什么用？前面计算的是错误的，没有考虑MCU宽度
// 这里都已经是round过的了，所以直接计算
if (((c->width < 3) && (c->ssx != ssxmax)) || ((c->height < 3) && (c->ssy != ssymax))) njThrow(NJ_UNSUPPORTED);
if (!(c->pixels = njAllocMem(c->stride * (nj.mbheight * nj.mbsizey * c->ssy / ssymax)))) njThrow(NJ_OUT_OF_MEM); // 为分量分配内存
// 大小是所有MCU的
// 可能比图片实际
// 尺寸大
}
if (nj.ncomp == 3) { // 只有有3个颜色分量的时候才需要
nj.rgb = njAllocMem(nj.width * nj.height * nj.ncomp);
if (!nj.rgb) njThrow(NJ_OUT_OF_MEM);
}
njSkip(nj.length);
}
NJ_INLINE void njDecodeDHT(void) {
int codelen, currcnt, remain, spread, i, j;
nj_vlc_code_t *vlc;
static unsigned char counts[16]; // 码字
njDecodeLength();
while (nj.length >= 17) { // 码字的数量(16) + 类型和ID(1)
i = nj.pos[0]; // 类型和ID
if (i & 0xEC) njThrow(NJ_SYNTAX_ERROR); // (11101100)
if (i & 0x02) njThrow(NJ_UNSUPPORTED); // (00000010)
i = (i | (i >> 3)) & 3; // combined DC/AC + tableid value
// 直流0，直流1，交流0，交流1
for (codelen = 1; codelen <= 16; ++codelen) // 码字长度
counts[codelen - 1] = nj.pos[codelen]; // 读取码字 DHT 当中的16个字节 00 01 05 01 01 01 01 01 01 00 00 00 00 00 00 00
njSkip(17);
vlc = &nj.vlctab[i][0];
remain = spread = 65536;
for (codelen = 1; codelen <= 16; ++codelen) {
spread >>= 1; // 干什么？ // 65536 >> 16 = 1 每个category所包含的编码个数
currcnt = counts[codelen - 1];
if (!currcnt) continue; // 如果该位数没有码字
if (nj.length < currcnt) njThrow(NJ_SYNTAX_ERROR);
remain -= currcnt << (16 - codelen); // 干什么？ 计算当前size的码字占用多少VLC表的空间，得到剩下的空间
if (remain < 0) njThrow(NJ_SYNTAX_ERROR);
for (i = 0; i < currcnt; ++i) { // 码字个数，同样位数的码字可以有多个
register unsigned char code = nj.pos[i]; // 有多少个就，读多少个字节
for (j = spread; j; --j) { // 保存这么多个有什么作用？
vlc->bits = (unsigned char) codelen; // 码字位数
vlc->code = code; // 码字值(这个读取出来的到底是什么？00 01 02 03 04 05 06 07 08 09 0A 0B，是值，还是权重？)
++vlc;
}
}
njSkip(currcnt);
}
while (remain--) { // 16位都填充完成，剩下的就用0填(1位码字XX个，2位码字XX个，...)
// printf("i'm nothing vlc id %d\n", tblid);
vlc->bits = 0;
++vlc;
}
// for debug
// printf("Huffman vlc id %d\n", tblid);
// njPrintHT(tblid);
}
if (nj.length) njThrow(NJ_SYNTAX_ERROR);
}
NJ_INLINE void njDecodeDQT(void) {
int i;
unsigned char *t;
njDecodeLength();
while (nj.length >= 65) {
i = nj.pos[0]; // QT信息，高4位为QT精度，低4位为QT号
if (i & 0xFC) njThrow(NJ_SYNTAX_ERROR); // (1111 1110)这个用来检测QT号码是否正确的吗？目前精度好像都为0，所以这么写？
nj.qtavail |= 1 << i; // XXX 直接通过这里转换为数量？
t = &nj.qtab[i][0];
for (i = 0; i < 64; ++i)
t[i] = nj.pos[i + 1]; // 读取到QT数组当中，但应该还是按照文件流当中的排列
njSkip(65);
}
if (nj.length) njThrow(NJ_SYNTAX_ERROR);
}
NJ_INLINE void njDecodeDRI(void) {
njDecodeLength();
if (nj.length < 2) njThrow(NJ_SYNTAX_ERROR);
nj.rstinterval = njDecode16(nj.pos);
njSkip(nj.length);
}
static int njGetVLC(nj_vlc_code_t* vlc, unsigned char* code) { // Variable Length Coding
int value = njShowBits(16); // 为什么是2个字节？ 这又是什么？ 或许是这里的Huffman编码的码字永远是少于16位的
int bits = vlc[value].bits;
if (!bits) { nj.error = NJ_SYNTAX_ERROR; return 0; }
njSkipBits(bits);
value = vlc[value].code;
if (code) *code = (unsigned char) value;
bits = value & 15; // 这个value必须是0~15之间？
if (!bits) {
return 0;
}
value = njGetBits(bits); // 如果这里需要读取的值的位数超过之前njShowBits剩余的值，这里会重新读取
if (value < (1 << (bits - 1)))
value += ((-1) << bits) + 1;
return value;
}
NJ_INLINE void njDecodeBlock(nj_component_t* c, unsigned char* out) { // 8 x 8
unsigned char code = 0;
int value, coef = 0;
njFillMem(nj.block, 0, sizeof(nj.block));
int dcvlcval = njGetVLC(&nj.vlctab[c->dctabsel][0], NULL);
c->dcpred += dcvlcval;
nj.block[0] = (c->dcpred) * nj.qtab[c->qtsel][0]; // DC // 这里是反量化？
do {
value = njGetVLC(&nj.vlctab[c->actabsel][0], &code); // DC 2/3
if (!code) break; // EOB
if (!(code & 0x0F) && (code != 0xF0)) njThrow(NJ_SYNTAX_ERROR); // 这是什么字段？(难道是为了兼容这个过程中可以遇到0xF0这样的数据)
coef += (code >> 4) + 1; // coefficient 系数
if (coef > 63) njThrow(NJ_SYNTAX_ERROR);
nj.block[(int) njZZ[coef]] = value * nj.qtab[c->qtsel][coef]; // AC 这里是反量化？
} while (coef < 63);
for (coef = 0; coef < 64; coef += 8)
njRowIDCT(&nj.block[coef]); // 上面先Huffman解码/反量化，这里行(反DCT)
for (coef = 0; coef < 8; ++coef)
njColIDCT(&nj.block[coef], &out[coef], c->stride);
}
NJ_INLINE void njDecodeScan(void) {
// njPrintHT(0);
// njPrintHT(2);
// njPrintHT(1);
// njPrintHT(3);
int i, mbx, mby, sbx, sby;
int rstcount = nj.rstinterval, nextrst = 0;
nj_component_t* c;
njDecodeLength();
if (nj.length < (4 + 2 * nj.ncomp)) njThrow(NJ_SYNTAX_ERROR);
if (nj.pos[0] != nj.ncomp) njThrow(NJ_UNSUPPORTED);
njSkip(1); // 颜色分量数量
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) {
if (nj.pos[0] != c->cid) njThrow(NJ_SYNTAX_ERROR); // 颜色分量ID
if (nj.pos[1] & 0xEE) njThrow(NJ_SYNTAX_ERROR);
c->dctabsel = nj.pos[1] >> 4; // 高4位为直流表DC Table
c->actabsel = (nj.pos[1] & 1) | 2; // 低4位为交流表AC Table(这里有做特殊处理，所以AC的表名不会和DC相同)
njSkip(2);
}
if (nj.pos[0] || (nj.pos[1] != 63) || nj.pos[2]) njThrow(NJ_UNSUPPORTED);
njSkip(nj.length); // 忽略3个字节 通常为 00 3F 00
// 2 + 1 + 6 + 3为12字节，这个marker的长度刚好为12字节
// 接下来都是编码过的图像数据
for (mbx = mby = 0;;) {
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) // 每个分量都要decode
for (sby = 0; sby < c->ssy; ++sby) // 水平/垂直因子
for (sbx = 0; sbx < c->ssx; ++sbx) {
njDecodeBlock(c, &c->pixels[((mby * c->ssy + sby) * c->stride + mbx * c->ssx + sbx) << 3]); // 读取原始编码过
// 的图片数据到block中
// 并反量化，反离散余弦变换
njCheckError();
}
if (++mbx >= nj.mbwidth) { // 读完所有的MCU，到达最右就返回从下一行开始
mbx = 0;
if (++mby >= nj.mbheight) break; // 到达最底行的时候推出，decode结束
}
if (nj.rstinterval && !(--rstcount)) { // restart marker
njByteAlign();
i = njGetBits(16);
if (((i & 0xFFF8) != 0xFFD0) || ((i & 7) != nextrst)) njThrow(NJ_SYNTAX_ERROR);
nextrst = (nextrst + 1) & 7;
rstcount = nj.rstinterval;
for (i = 0; i < 3; ++i)
nj.comp[i].dcpred = 0;
}
}
nj.error = __NJ_FINISHED;
}
#if NJ_CHROMA_FILTER
#define CF4A (-9)
#define CF4B (111)
#define CF4C (29)
#define CF4D (-3)
#define CF3A (28)
#define CF3B (109)
#define CF3C (-9)
#define CF3X (104)
#define CF3Y (27)
#define CF3Z (-3)
#define CF2A (139)
#define CF2B (-11)
#define CF(x) njClip(((x) + 64) >> 7)
// 通常我们放大图片的时候就需要upsampling，缩小的时候就downsampling，通称为resampling
// 这里Cb/Cr分量的会少些，所以需要upsampling
NJ_INLINE void njUpsampleH(nj_component_t* c) {
const int xmax = c->width - 3;
unsigned char *out, *lin, *lout;
int x, y;
out = njAllocMem((c->width * c->height) << 1);
if (!out) njThrow(NJ_OUT_OF_MEM);
lin = c->pixels;
lout = out;
for (y = c->height; y; --y) {
lout[0] = CF(CF2A * lin[0] + CF2B * lin[1]);
lout[1] = CF(CF3X * lin[0] + CF3Y * lin[1] + CF3Z * lin[2]);
lout[2] = CF(CF3A * lin[0] + CF3B * lin[1] + CF3C * lin[2]);
for (x = 0; x < xmax; ++x) {
lout[(x << 1) + 3] = CF(CF4A * lin[x] + CF4B * lin[x + 1] + CF4C * lin[x + 2] + CF4D * lin[x + 3]);
lout[(x << 1) + 4] = CF(CF4D * lin[x] + CF4C * lin[x + 1] + CF4B * lin[x + 2] + CF4A * lin[x + 3]);
}
lin += c->stride;
lout += c->width << 1;
lout[-3] = CF(CF3A * lin[-1] + CF3B * lin[-2] + CF3C * lin[-3]);
lout[-2] = CF(CF3X * lin[-1] + CF3Y * lin[-2] + CF3Z * lin[-3]);
lout[-1] = CF(CF2A * lin[-1] + CF2B * lin[-2]);
}
c->width <<= 1;
c->stride = c->width;
njFreeMem(c->pixels);
c->pixels = out;
}
NJ_INLINE void njUpsampleV(nj_component_t* c) {
const int w = c->width, s1 = c->stride, s2 = s1 + s1;
unsigned char *out, *cin, *cout;
int x, y;
out = njAllocMem((c->width * c->height) << 1);
if (!out) njThrow(NJ_OUT_OF_MEM);
for (x = 0; x < w; ++x) {
cin = &c->pixels[x];
cout = &out[x];
*cout = CF(CF2A * cin[0] + CF2B * cin[s1]); cout += w;
*cout = CF(CF3X * cin[0] + CF3Y * cin[s1] + CF3Z * cin[s2]); cout += w;
*cout = CF(CF3A * cin[0] + CF3B * cin[s1] + CF3C * cin[s2]); cout += w;
cin += s1;
for (y = c->height - 3; y; --y) {
*cout = CF(CF4A * cin[-s1] + CF4B * cin[0] + CF4C * cin[s1] + CF4D * cin[s2]); cout += w;
*cout = CF(CF4D * cin[-s1] + CF4C * cin[0] + CF4B * cin[s1] + CF4A * cin[s2]); cout += w;
cin += s1;
}
cin += s1;
*cout = CF(CF3A * cin[0] + CF3B * cin[-s1] + CF3C * cin[-s2]); cout += w;
*cout = CF(CF3X * cin[0] + CF3Y * cin[-s1] + CF3Z * cin[-s2]); cout += w;
*cout = CF(CF2A * cin[0] + CF2B * cin[-s1]);
}
c->height <<= 1;
c->stride = c->width;
njFreeMem(c->pixels);
c->pixels = out;
}
#else
NJ_INLINE void njUpsample(nj_component_t* c) {
int x, y, xshift = 0, yshift = 0;
unsigned char *out, *lin, *lout;
while (c->width < nj.width) { c->width <<= 1; ++xshift; }
while (c->height < nj.height) { c->height <<= 1; ++yshift; }
out = njAllocMem(c->width * c->height); // 放大后的尺寸
if (!out) njThrow(NJ_OUT_OF_MEM);
lin = c->pixels;
lout = out;
for (y = 0; y < c->height; ++y) {
lin = &c->pixels[(y >> yshift) * c->stride];
for (x = 0; x < c->width; ++x)
lout[x] = lin[x >> xshift];
lout += c->width;
}
c->stride = c->width;
njFreeMem(c->pixels);
c->pixels = out;
}
#endif
NJ_INLINE void njConvert() {
int i;
nj_component_t* c;
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) { // 如果需要的话就upsampling
#if NJ_CHROMA_FILTER
while ((c->width < nj.width) || (c->height < nj.height)) {
if (c->width < nj.width) njUpsampleH(c);
njCheckError();
if (c->height < nj.height) njUpsampleV(c);
njCheckError();
}
#else
if ((c->width < nj.width) || (c->height < nj.height))
njUpsample(c);
#endif
if ((c->width < nj.width) || (c->height < nj.height)) njThrow(NJ_INTERNAL_ERR);
}
if (nj.ncomp == 3) { // SEE njGetImage()
// convert to RGB
int x, yy;
unsigned char *prgb = nj.rgb;
const unsigned char *py = nj.comp[0].pixels;
const unsigned char *pcb = nj.comp[1].pixels;
const unsigned char *pcr = nj.comp[2].pixels;
// 多余的数据(编/解码是对齐用的)会被丢弃吗？
for (yy = nj.height; yy; --yy) { // 列
for (x = 0; x < nj.width; ++x) { // 行
register int y = py[x] << 8; // 这是为什么？ 色彩空间转换公式计算需要
register int cb = pcb[x] - 128; // YCbCr的Cb和Cr一般都是有符号数，但是在JPEG当中都是无符号数
register int cr = pcr[x] - 128;
*prgb++ = njClip((y + 359 * cr + 128) >> 8); // 色彩空间转换，YCbCr到RGB
*prgb++ = njClip((y - 88 * cb - 183 * cr + 128) >> 8);
*prgb++ = njClip((y + 454 * cb + 128) >> 8);
}
py += nj.comp[0].stride; // 移动YCbCr数据指针，每一行都是有stride的，所以当需要的数据都得到时，后面的就不管，直接丢弃，移动到下一行
pcb += nj.comp[1].stride;
pcr += nj.comp[2].stride;
}
} else if (nj.comp[0].width != nj.comp[0].stride) { // 如果宽度和stride都一样，什么都不用做
// grayscale -> only remove stride
unsigned char *pin = &nj.comp[0].pixels[nj.comp[0].stride];
unsigned char *pout = &nj.comp[0].pixels[nj.comp[0].width];
int y;
for (y = nj.comp[0].height - 1; y; --y) {
njCopyMem(pout, pin, nj.comp[0].width);
pin += nj.comp[0].stride;
pout += nj.comp[0].width;
}
nj.comp[0].stride = nj.comp[0].width;
}
}
void njInit(void) {
njFillMem(&nj, 0, sizeof(nj_context_t)); // 初始化nj_context_t
}
void njDone(void) {
int i;
for (i = 0; i < 3; ++i)
if (nj.comp[i].pixels) njFreeMem((void*) nj.comp[i].pixels);
if (nj.rgb) njFreeMem((void*) nj.rgb);
njInit();
}
nj_result_t njDecode(const void* jpeg, const int size) {
njDone();
nj.pos = (const unsigned char*) jpeg;
nj.size = size & 0x7FFFFFFF; // ？
if (nj.size < 2) return NJ_NO_JPEG;
if ((nj.pos[0] ^ 0xFF) | (nj.pos[1] ^ 0xD8)) return NJ_NO_JPEG; // 不以0xFFD8打头(为什么要用异或来判断？)
njSkip(2);
while (!nj.error) { // 有“错误”的时候离开
if ((nj.size < 2) || (nj.pos[0] != 0xFF)) return NJ_SYNTAX_ERROR; // 太小，或者不以0xFF打头
njSkip(2); // 移动到标签的后面(长度字段的前面)
switch (nj.pos[-1]) {
case 0xC0: njDecodeSOF(); break;
case 0xC4: njDecodeDHT(); break;
case 0xDB: njDecodeDQT(); break;
case 0xDD: njDecodeDRI(); break;
case 0xDA: njDecodeScan(); break;
case 0xFE: njSkipMarker(); break;
default:
if ((nj.pos[-1] & 0xF0) == 0xE0) // JPG0和APP0字段，目前都忽略
njSkipMarker();
else
return NJ_UNSUPPORTED;
}
}
if (nj.error != __NJ_FINISHED) return nj.error;
nj.error = NJ_OK;
njConvert();
return nj.error;
}
int njGetWidth(void) { return nj.width; }
int njGetHeight(void) { return nj.height; }
int njIsColor(void) { return (nj.ncomp != 1); }
unsigned char* njGetImage(void) { return (nj.ncomp == 1) ? nj.comp[0].pixels : nj.rgb; } // 一/三个分量
int njGetImageSize(void) { return nj.width * nj.height * nj.ncomp; }
#endif // _NJ_INCLUDE_HEADER_ONLY

10
src/kernel/nanojpeg.h
View file

@ -1,10 +0,0 @@
// nanojpeg.h - Header for NanoJPEG decoder (freestanding kernel use)
#ifndef NANOJPEG_H
#define NANOJPEG_H
// Include naojpeg.c in header-only mode to get the type/function declarations
#define _NJ_INCLUDE_HEADER_ONLY
#include "nanojpeg.c"
#undef _NJ_INCLUDE_HEADER_ONLY
#endif // NANOJPEG_H

28
src/kernel/nj_kernel.c
View file

@ -1,28 +0,0 @@
// Copyright (c) 2023-2026 Chris (boreddevnl)
// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
// This header needs to maintain in any file it is present in, as per the GPL license terms.
#include "memory_manager.h"
#include <stddef.h>
void* njAllocMem(int size) {
return kmalloc((size_t)size);
}
void njFreeMem(void* block) {
if (block) kfree(block);
}
void njFillMem(void* block, unsigned char byte, int size) {
unsigned char *p = (unsigned char*)block;
for (int i = 0; i < size; i++) {
p[i] = byte;
}
}
void njCopyMem(void* dest, const void* src, int size) {
unsigned char *d = (unsigned char*)dest;
const unsigned char *s = (const unsigned char*)src;
for (int i = 0; i < size; i++) {
d[i] = s[i];
}
}

44
src/kernel/process.c
View file

@ -31,8 +31,7 @@ void process_init(void) {
kernel_proc->pml4_phys = paging_get_pml4_phys(); kernel_proc->pml4_phys = paging_get_pml4_phys();
kernel_proc->kernel_stack = 0; kernel_proc->kernel_stack = 0;
// Initialize FPU state for kernel // Initialize FPU/SSE state for kernel (first interrupt will capture it on stack)
asm volatile("fxsave %0" : "=m"(kernel_proc->fpu_state));
kernel_proc->fpu_initialized = true; kernel_proc->fpu_initialized = true;
for (int i = 0; i < MAX_PROCESS_FDS; i++) kernel_proc->fds[i] = NULL; for (int i = 0; i < MAX_PROCESS_FDS; i++) kernel_proc->fds[i] = NULL;
@ -58,12 +57,12 @@ void process_create(void* entry_point, bool is_user) {
if (!new_proc->pml4_phys) return; if (!new_proc->pml4_phys) return;
// 2. Allocate aligned stack // 2. Allocate aligned stack
void* stack = kmalloc_aligned(4096, 4096); void* user_stack = kmalloc_aligned(4096, 4096);
void* kernel_stack = kmalloc_aligned(32768, 32768); // Needed for when user interrupts to Ring 0 void* kernel_stack = kmalloc_aligned(32768, 32768); // Needed for when user interrupts to Ring 0
if (is_user) { if (is_user) {
// Map user stack to 0x800000 // Map user stack to 0x800000
paging_map_page(new_proc->pml4_phys, 0x800000, v2p((uint64_t)stack), PT_PRESENT | PT_RW | PT_USER); paging_map_page(new_proc->pml4_phys, 0x800000, v2p((uint64_t)user_stack), PT_PRESENT | PT_RW | PT_USER);
// Allocate code page aligned and copy code // Allocate code page aligned and copy code
void* code = kmalloc_aligned(4096, 4096); void* code = kmalloc_aligned(4096, 4096);
@ -86,11 +85,16 @@ void process_create(void* entry_point, bool is_user) {
// Push 15 zeros for general purpose registers (r15 -> rax) // Push 15 zeros for general purpose registers (r15 -> rax)
for (int i = 0; i < 15; i++) *(--stack_ptr) = 0; for (int i = 0; i < 15; i++) *(--stack_ptr) = 0;
// Push 512 bytes for SSE/FPU state (fxsave_region)
// Zero it out for safety
stack_ptr = (uint64_t*)((uint64_t)stack_ptr - 512);
for (int i = 0; i < 512/8; i++) stack_ptr[i] = 0;
new_proc->kernel_stack = (uint64_t)kernel_stack + 32768; new_proc->kernel_stack = (uint64_t)kernel_stack + 32768;
new_proc->rsp = (uint64_t)stack_ptr; new_proc->rsp = (uint64_t)stack_ptr;
} else { } else {
// Kernel thread // Kernel thread
uint64_t* stack_ptr = (uint64_t*)((uint64_t)stack + 4096); uint64_t* stack_ptr = (uint64_t*)((uint64_t)kernel_stack + 32768);
*(--stack_ptr) = 0x10; // SS (Kernel Data) *(--stack_ptr) = 0x10; // SS (Kernel Data)
stack_ptr--; stack_ptr--;
*stack_ptr = (uint64_t)stack_ptr; // RSP *stack_ptr = (uint64_t)stack_ptr; // RSP
@ -100,15 +104,21 @@ void process_create(void* entry_point, bool is_user) {
*(--stack_ptr) = 0; // int_no *(--stack_ptr) = 0; // int_no
*(--stack_ptr) = 0; // err_code *(--stack_ptr) = 0; // err_code
// Push 15 zeros for general purpose registers (r15 -> rax)
for (int i = 0; i < 15; i++) *(--stack_ptr) = 0; for (int i = 0; i < 15; i++) *(--stack_ptr) = 0;
new_proc->kernel_stack = 0; // Push 512 bytes for SSE/FPU state (fxsave_region)
stack_ptr = (uint64_t*)((uint64_t)stack_ptr - 512);
// Zero it out for safety
for (int i = 0; i < 512/8; i++) stack_ptr[i] = 0;
new_proc->kernel_stack = (uint64_t)kernel_stack + 32768;
new_proc->rsp = (uint64_t)stack_ptr; new_proc->rsp = (uint64_t)stack_ptr;
kfree(user_stack); // Unused for kernel threads
} }
// Initialize FPU state for new process // Initialize FPU state for new process
asm volatile("fninit"); asm volatile("fninit");
asm volatile("fxsave %0" : "=m"(new_proc->fpu_state));
new_proc->fpu_initialized = true; new_proc->fpu_initialized = true;
// Add to linked list // Add to linked list
@ -246,7 +256,6 @@ process_t* process_create_elf(const char* filepath, const char* args_str) {
*(--stack_ptr) = entry_point; // RIP *(--stack_ptr) = entry_point; // RIP
*(--stack_ptr) = 0; // err_code *(--stack_ptr) = 0; // err_code
*(--stack_ptr) = 0; // int_no *(--stack_ptr) = 0; // int_no
// 15 General purpose registers // 15 General purpose registers
*(--stack_ptr) = 0; // RAX *(--stack_ptr) = 0; // RAX
*(--stack_ptr) = 0; // RBX *(--stack_ptr) = 0; // RBX
@ -264,6 +273,12 @@ process_t* process_create_elf(const char* filepath, const char* args_str) {
*(--stack_ptr) = 0; // R14 *(--stack_ptr) = 0; // R14
*(--stack_ptr) = 0; // R15 *(--stack_ptr) = 0; // R15
// Space for 512-byte fxsave_region
stack_ptr = (uint64_t*)((uint64_t)stack_ptr - 512);
// Initialize with a clean FPU state
asm volatile("fninit");
asm volatile("fxsave %0" : "=m"(*stack_ptr));
new_proc->kernel_stack = (uint64_t)kernel_stack + 32768; new_proc->kernel_stack = (uint64_t)kernel_stack + 32768;
new_proc->kernel_stack_alloc = kernel_stack; new_proc->kernel_stack_alloc = kernel_stack;
new_proc->user_stack_alloc = stack; new_proc->user_stack_alloc = stack;
@ -271,7 +286,6 @@ process_t* process_create_elf(const char* filepath, const char* args_str) {
// Initialize FPU state for new process // Initialize FPU state for new process
asm volatile("fninit"); asm volatile("fninit");
asm volatile("fxsave %0" : "=m"(new_proc->fpu_state));
new_proc->fpu_initialized = true; new_proc->fpu_initialized = true;
// Slot is already counted in process_count if new, or reused. // Slot is already counted in process_count if new, or reused.
@ -296,22 +310,12 @@ uint64_t process_schedule(uint64_t current_rsp) {
// serial_write("SCHED\n"); // serial_write("SCHED\n");
// Save context // Save/Restore context
current_process->rsp = current_rsp; current_process->rsp = current_rsp;
// Save FPU state
if (current_process->fpu_initialized) {
asm volatile("fxsave %0" : "=m"(current_process->fpu_state));
}
// Switch process // Switch process
current_process = current_process->next; current_process = current_process->next;
// Restore FPU state
if (current_process->fpu_initialized) {
asm volatile("fxrstor %0" : : "m"(current_process->fpu_state));
}
// Update Kernel Stack for User Mode interrupts and System Calls // Update Kernel Stack for User Mode interrupts and System Calls
if (current_process->is_user && current_process->kernel_stack) { if (current_process->is_user && current_process->kernel_stack) {
tss_set_stack(current_process->kernel_stack); tss_set_stack(current_process->kernel_stack);

4
src/kernel/process.h
View file

@ -15,11 +15,12 @@ struct FAT32_FileHandle;
// Registers saved on the stack by interrupts/exceptions // Registers saved on the stack by interrupts/exceptions
typedef struct registers_t { typedef struct registers_t {
uint8_t fxsave_region[512]; // SSE/FPU state, MUST be at the bottom (lowest address)
uint64_t r15, r14, r13, r12, r11, r10, r9, r8; uint64_t r15, r14, r13, r12, r11, r10, r9, r8;
uint64_t rbp, rdi, rsi, rdx, rcx, rbx, rax; uint64_t rbp, rdi, rsi, rdx, rcx, rbx, rax;
uint64_t int_no, err_code; uint64_t int_no, err_code;
uint64_t rip, cs, rflags, rsp, ss; uint64_t rip, cs, rflags, rsp, ss;
} __attribute__((packed)) registers_t; } __attribute__((packed, aligned(16))) registers_t;
typedef struct process { typedef struct process {
uint32_t pid; uint32_t pid;
@ -45,7 +46,6 @@ typedef struct process {
struct process *next; struct process *next;
uint8_t fpu_state[512] __attribute__((aligned(16)));
bool fpu_initialized; bool fpu_initialized;
} __attribute__((aligned(16))) process_t; } __attribute__((aligned(16))) process_t;

29
src/kernel/stb_image.c Normal file
View file

@ -0,0 +1,29 @@
// stb_image.c wrapper for Kernel Mode
#include "memory_manager.h"
// Define custom memory allocators for stb_image in freestanding environment
#define STBI_MALLOC kmalloc
#define STBI_REALLOC krealloc
#define STBI_FREE kfree
// Kernel doesn't have standard I/O headers or functions
#define STBI_NO_STDIO
#define STBI_ASSERT(x) ((void)(x))
// Kernel doesn't have math.h, so disable float/hdr functions
#define STBI_NO_LINEAR
#define STBI_NO_HDR
// Limit maximum dimensions to prevent memory exhaustion and large stack frames
#define STBI_MAX_DIMENSIONS 4096
// Kernel doesn't have standard stdlib, disable SIMD and provide abs
#define STBI_NO_SIMD
#define STBI_NO_PSD
#define STBI_NO_PIC
#define STBI_NO_PNM
static inline int abs(int x) { return x < 0 ? -x : x; }
// Include the implementation
#define STB_IMAGE_IMPLEMENTATION
#include "userland/stb_image.h"

13
src/kernel/syscall.c
View file

@ -525,7 +525,18 @@ static uint64_t syscall_handler_inner(uint64_t syscall_num, uint64_t arg1, uint6
uint32_t *dest = &win->pixels[(ry + y) * win->w + rx]; uint32_t *dest = &win->pixels[(ry + y) * win->w + rx];
uint32_t *src = &image_data[(src_y_offset + y) * (int)params[2] + src_x_offset]; uint32_t *src = &image_data[(src_y_offset + y) * (int)params[2] + src_x_offset];
for (int x = 0; x < rw; x++) { for (int x = 0; x < rw; x++) {
dest[x] = src[x]; uint32_t s = src[x];
uint8_t alpha = (s >> 24) & 0xFF;
if (alpha == 0xFF) {
dest[x] = s;
} else if (alpha == 0) {
// Skip
} else {
uint32_t d = dest[x];
uint32_t rb = ((s & 0xFF00FF) * alpha + (d & 0xFF00FF) * (255 - alpha)) >> 8;
uint32_t g = ((s & 0x00FF00) * alpha + (d & 0x00FF00) * (255 - alpha)) >> 8;
dest[x] = (rb & 0xFF00FF) | (g & 0x00FF00) | 0xFF000000;
}
} }
} }
} }

8
src/kernel/syscalls.asm
View file

@ -46,6 +46,10 @@ syscall_entry:
push r14 push r14
push r15 push r15
; Save SSE/FPU state
sub rsp, 512
fxsave [rsp]
; 4. Call C handler with registers_t* ; 4. Call C handler with registers_t*
mov rdi, rsp mov rdi, rsp
sti sti
@ -55,6 +59,10 @@ syscall_entry:
; 5. Switch to the resulting RSP (might be different if task switched) ; 5. Switch to the resulting RSP (might be different if task switched)
mov rsp, rax mov rsp, rax
; Restore SSE/FPU state
fxrstor [rsp]
add rsp, 512
; 6. Restore and return via iretq ; 6. Restore and return via iretq
pop r15 pop r15
pop r14 pop r14

207
src/kernel/tcp.c
View file

@ -1,207 +0,0 @@
// Copyright (c) 2023-2026 Chris (boreddevnl)
// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
// This header needs to maintain in any file it is present in, as per the GPL license terms.
#include "net_defs.h"
#include "cmd.h"
#include "memory_manager.h"
// Simplified TCP State
typedef enum {
TCP_CLOSED,
TCP_SYN_SENT,
TCP_ESTABLISHED,
TCP_FIN_WAIT
} tcp_state_enum;
struct tcp_socket_t {
ipv4_address_t remote_ip;
uint16_t remote_port;
uint16_t local_port;
uint32_t seq_num;
uint32_t ack_num;
tcp_state_enum state;
// Receive Buffer
uint8_t *rx_buffer;
int rx_size;
int rx_pos;
bool connected;
};
static tcp_socket_t *active_socket = NULL; // Single socket support for simplicity
// Pseudo Header for Checksum
typedef struct {
uint32_t src_ip;
uint32_t dst_ip;
uint8_t reserved;
uint8_t protocol;
uint16_t tcp_len;
} __attribute__((packed)) tcp_pseudo_header_t;
static uint16_t tcp_checksum(tcp_socket_t *sock, tcp_header_t *tcp, const void *data, uint16_t len) {
uint32_t sum = 0;
// Pseudo Header
ipv4_address_t local = get_local_ip();
tcp_pseudo_header_t ph;
ph.src_ip = *(uint32_t*)local.bytes;
ph.dst_ip = *(uint32_t*)sock->remote_ip.bytes;
ph.reserved = 0;
ph.protocol = IP_PROTO_TCP;
ph.tcp_len = htons(sizeof(tcp_header_t) + len);
uint16_t *p = (uint16_t*)&ph;
for(int i=0; i<sizeof(tcp_pseudo_header_t)/2; i++) sum += p[i];
// TCP Header + Data
p = (uint16_t*)tcp;
for(int i=0; i<sizeof(tcp_header_t)/2; i++) sum += p[i];
p = (uint16_t*)data;
int dlen = len;
while(dlen > 1) {
sum += *p++;
dlen -= 2;
}
if(dlen) sum += *(uint8_t*)p;
while(sum >> 16) sum = (sum & 0xFFFF) + (sum >> 16);
return (uint16_t)~sum;
}
void tcp_send_packet(tcp_socket_t *sock, uint8_t flags, const void *data, uint16_t len) {
uint16_t total_len = sizeof(tcp_header_t) + len;
uint8_t *packet = kmalloc(total_len);
tcp_header_t *tcp = (tcp_header_t*)packet;
tcp->src_port = htons(sock->local_port);
tcp->dst_port = htons(sock->remote_port);
tcp->seq_num = htonl(sock->seq_num);
tcp->ack_num = htonl(sock->ack_num);
tcp->data_offset = (sizeof(tcp_header_t) / 4) << 4;
tcp->flags = flags;
tcp->window_size = htons(8192);
tcp->urgent_ptr = 0;
tcp->checksum = 0;
if (data) {
// Copy data
uint8_t *payload = packet + sizeof(tcp_header_t);
const uint8_t *d = (const uint8_t*)data;
for(int i=0; i<len; i++) payload[i] = d[i];
}
tcp->checksum = tcp_checksum(sock, tcp, data, len);
ip_send_packet(sock->remote_ip, IP_PROTO_TCP, packet, total_len);
kfree(packet);
// Advance sequence for SYN/FIN or data
if (len > 0 || (flags & (TCP_SYN|TCP_FIN))) {
sock->seq_num += (len > 0 ? len : 1);
}
}
void tcp_handle_packet(ipv4_address_t src, void *data, uint16_t len) {
if (!active_socket) return;
tcp_header_t *tcp = (tcp_header_t*)data;
uint16_t data_len = len - ((tcp->data_offset >> 4) * 4);
uint8_t *payload = (uint8_t*)data + ((tcp->data_offset >> 4) * 4);
// Check ports
if (ntohs(tcp->dst_port) != active_socket->local_port) return;
// State Machine
if (active_socket->state == TCP_SYN_SENT) {
if ((tcp->flags & TCP_SYN) && (tcp->flags & TCP_ACK)) {
active_socket->ack_num = ntohl(tcp->seq_num) + 1;
active_socket->state = TCP_ESTABLISHED;
active_socket->connected = true;
// Send ACK
tcp_send_packet(active_socket, TCP_ACK, NULL, 0);
}
} else if (active_socket->state == TCP_ESTABLISHED) {
if (tcp->flags & TCP_FIN) {
active_socket->ack_num = ntohl(tcp->seq_num) + 1;
tcp_send_packet(active_socket, TCP_ACK | TCP_FIN, NULL, 0);
active_socket->state = TCP_CLOSED;
active_socket->connected = false;
} else if (data_len > 0) {
// Accept data
if (active_socket->rx_pos < active_socket->rx_size) {
for(int i=0; i<data_len && active_socket->rx_pos < active_socket->rx_size - 1; i++) {
active_socket->rx_buffer[active_socket->rx_pos++] = payload[i];
}
active_socket->rx_buffer[active_socket->rx_pos] = 0; // Null terminate for text
}
active_socket->ack_num = ntohl(tcp->seq_num) + data_len;
tcp_send_packet(active_socket, TCP_ACK, NULL, 0);
}
}
}
tcp_socket_t* tcp_connect(ipv4_address_t ip, uint16_t port) {
if (active_socket) kfree(active_socket);
active_socket = kmalloc(sizeof(tcp_socket_t));
active_socket->remote_ip = ip;
active_socket->remote_port = port;
active_socket->local_port = 49152 + (port % 1000); // Random-ish ephemeral
active_socket->seq_num = 1000;
active_socket->ack_num = 0;
active_socket->state = TCP_SYN_SENT;
active_socket->connected = false;
active_socket->rx_buffer = kmalloc(65536); // 64KB buffer
active_socket->rx_size = 65536;
active_socket->rx_pos = 0;
// Send SYN
tcp_send_packet(active_socket, TCP_SYN, NULL, 0);
// Wait for connection (Blocking)
int timeout = 100000000;
while (!active_socket->connected && timeout-- > 0);
if (!active_socket->connected) {
kfree(active_socket->rx_buffer);
kfree(active_socket);
active_socket = NULL;
return NULL;
}
return active_socket;
}
void tcp_send(tcp_socket_t *sock, const char *data, int len) {
if (!sock || !sock->connected) return;
if (len == 0) {
// Calculate strlen
const char *p = data;
while(*p++) len++;
}
tcp_send_packet(sock, TCP_PSH | TCP_ACK, data, len);
}
void tcp_close(tcp_socket_t *sock) {
if (!sock) return;
tcp_send_packet(sock, TCP_FIN | TCP_ACK, NULL, 0);
sock->state = TCP_CLOSED;
sock->connected = false;
// Give time for packet to go out
for(volatile int i=0; i<1000000; i++);
kfree(sock->rx_buffer);
kfree(sock);
active_socket = NULL;
}
int tcp_read(tcp_socket_t *sock, char *buffer, int max_len) {
if (!sock) return 0;
int count = 0;
for (int i = 0; i < sock->rx_pos && i < max_len; i++) {
buffer[i] = sock->rx_buffer[i];
count++;
}
return count;
}

12
src/kernel/userland/Makefile
View file

@ -13,7 +13,7 @@ BIN_DIR = bin
LIBC_SOURCES = $(wildcard libc/*.c) LIBC_SOURCES = $(wildcard libc/*.c)
LIBC_OBJS = $(patsubst libc/%.c, $(BIN_DIR)/%.o, $(LIBC_SOURCES)) $(BIN_DIR)/crt0.o LIBC_OBJS = $(patsubst libc/%.c, $(BIN_DIR)/%.o, $(LIBC_SOURCES)) $(BIN_DIR)/crt0.o
APP_SOURCES = $(filter-out nanojpeg.c, $(wildcard *.c)) APP_SOURCES = $(filter-out stb_image.c, $(wildcard *.c))
APP_ELFS = $(patsubst %.c, $(BIN_DIR)/%.elf, $(APP_SOURCES)) APP_ELFS = $(patsubst %.c, $(BIN_DIR)/%.elf, $(APP_SOURCES))
DOOM_SOURCES = $(wildcard doom/*.c) DOOM_SOURCES = $(wildcard doom/*.c)
@ -30,25 +30,25 @@ $(BIN_DIR)/crt0.o: crt0.asm
$(BIN_DIR)/%.o: libc/%.c $(BIN_DIR)/%.o: libc/%.c
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@
$(BIN_DIR)/nanojpeg.o: nanojpeg.c $(BIN_DIR)/stb_image.o: stb_image.c
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@
$(BIN_DIR)/%.o: %.c $(BIN_DIR)/%.o: %.c
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@
$(BIN_DIR)/viewer.elf: $(LIBC_OBJS) $(BIN_DIR)/viewer.o $(BIN_DIR)/nanojpeg.o $(BIN_DIR)/viewer.elf: $(LIBC_OBJS) $(BIN_DIR)/viewer.o $(BIN_DIR)/stb_image.o
$(LD) $(LDFLAGS) $^ -o $@ $(LD) $(LDFLAGS) $^ -o $@
$(BIN_DIR)/settings.elf: $(LIBC_OBJS) $(BIN_DIR)/settings.o $(BIN_DIR)/nanojpeg.o $(BIN_DIR)/settings.elf: $(LIBC_OBJS) $(BIN_DIR)/settings.o $(BIN_DIR)/stb_image.o
$(LD) $(LDFLAGS) $^ -o $@ $(LD) $(LDFLAGS) $^ -o $@
$(BIN_DIR)/browser.elf: $(LIBC_OBJS) $(BIN_DIR)/browser.o $(BIN_DIR)/nanojpeg.o $(BIN_DIR)/browser.elf: $(LIBC_OBJS) $(BIN_DIR)/browser.o $(BIN_DIR)/stb_image.o
$(LD) $(LDFLAGS) $^ -o $@ $(LD) $(LDFLAGS) $^ -o $@
$(BIN_DIR)/%.o: doom/%.c $(BIN_DIR)/%.o: doom/%.c
$(CC) $(CFLAGS) -Wno-error -Idoom -c $< -o $@ $(CC) $(CFLAGS) -Wno-error -Idoom -c $< -o $@
$(BIN_DIR)/doom.elf: $(LIBC_OBJS) $(DOOM_OBJS) $(BIN_DIR)/nanojpeg.o $(BIN_DIR)/doom.elf: $(LIBC_OBJS) $(DOOM_OBJS) $(BIN_DIR)/stb_image.o
$(LD) $(LDFLAGS) $^ -o $@ $(LD) $(LDFLAGS) $^ -o $@
$(BIN_DIR)/%.elf: $(LIBC_OBJS) $(BIN_DIR)/%.o $(BIN_DIR)/%.elf: $(LIBC_OBJS) $(BIN_DIR)/%.o

243
src/kernel/userland/browser.c
View file

@ -2,7 +2,7 @@
// This software is released under the GNU General Public License v3.0. See LICENSE file for details. // This software is released under the GNU General Public License v3.0. See LICENSE file for details.
#include "libc/syscall.h" #include "libc/syscall.h"
#include "libc/libui.h" #include "libc/libui.h"
#include "nanojpeg.h" #include "stb_image.h"
#include <stdbool.h> #include <stdbool.h>
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
@ -110,6 +110,13 @@ typedef struct {
float scale; float scale;
int list_depth; int list_depth;
int blockquote_depth; // Added blockquote support int blockquote_depth; // Added blockquote support
bool img_loading;
bool img_failed;
uint32_t **img_frames;
int *img_delays;
int img_frame_count;
int img_current_frame;
uint64_t next_frame_tick;
} RenderElement; } RenderElement;
#define MAX_ELEMENTS 65536 #define MAX_ELEMENTS 65536
@ -129,18 +136,40 @@ static int focused_element = -1;
static void parse_html(const char *html); static void parse_html(const char *html);
static void parse_html_incremental(const char *html, int safe_len); static void parse_html_incremental(const char *html, int safe_len);
static void browser_reflow(void);
static void browser_paint(void); static void browser_paint(void);
static int inc_parse_offset = 0; static int inc_parse_offset = 0;
typedef struct {
uint32_t color;
float scale;
} FontState;
#define MAX_FONT_STACK 16
static FontState inc_font_stack[MAX_FONT_STACK];
static int inc_font_ptr = 0;
static void browser_clear(void) { static void browser_clear(void) {
for (int i = 0; i < element_count; i++) { for (int i = 0; i < element_count; i++) {
if (elements[i].img_pixels) { if (elements[i].img_pixels) {
free(elements[i].img_pixels); free(elements[i].img_pixels);
elements[i].img_pixels = NULL; elements[i].img_pixels = NULL;
} }
if (elements[i].img_frames) {
for (int k = 0; k < elements[i].img_frame_count; k++) {
if (elements[i].img_frames[k]) free(elements[i].img_frames[k]);
}
free(elements[i].img_frames);
elements[i].img_frames = NULL;
}
if (elements[i].img_delays) {
free(elements[i].img_delays);
elements[i].img_delays = NULL;
}
} }
element_count = 0; element_count = 0;
total_content_height = 0; total_content_height = 0;
inc_font_ptr = 0;
} }
static bool str_iequals(const char *s1, const char *s2) { static bool str_iequals(const char *s1, const char *s2) {
@ -275,6 +304,7 @@ static int fetch_content(const char *url, char *dest_buf, int max_len, bool prog
if (amp_pos != -1) safe_len = amp_pos; if (amp_pos != -1) safe_len = amp_pos;
if (safe_len > inc_parse_offset) { if (safe_len > inc_parse_offset) {
parse_html_incremental(body, safe_len); parse_html_incremental(body, safe_len);
browser_reflow();
browser_paint(); browser_paint();
ui_mark_dirty(win_browser, 0, 0, win_w, win_h); ui_mark_dirty(win_browser, 0, 0, win_w, win_h);
last_render = total; last_render = total;
@ -288,30 +318,71 @@ static int fetch_content(const char *url, char *dest_buf, int max_len, bool prog
return total; return total;
} }
static void decode_jpeg(unsigned char *data, int len, RenderElement *el) { static void decode_image(unsigned char *data, int len, RenderElement *el) {
njInit(); int img_w_orig, img_h_orig, channels;
if (njDecode(data, len) == NJ_OK) { int frame_count = 1;
int img_w_orig = njGetWidth(); int img_h_orig = njGetHeight(); int *delays = NULL;
unsigned char *rgb = njGetImage(); unsigned char *rgba = NULL;
if (rgb) {
int fit_w = img_w_orig; int fit_h = img_h_orig; if (len > 4 && data[0] == 'G' && data[1] == 'I' && data[2] == 'F') {
if (fit_w > win_w - 60) { fit_h = fit_h * (win_w - 60) / fit_w; fit_w = win_w - 60; } rgba = stbi_load_gif_from_memory(data, len, &delays, &img_w_orig, &img_h_orig, &frame_count, &channels, 4);
if (fit_h > 400) { fit_w = fit_w * 400 / fit_h; fit_h = 400; } } else {
rgba = stbi_load_from_memory(data, len, &img_w_orig, &img_h_orig, &channels, 4);
}
if (rgba && img_w_orig > 0 && img_h_orig > 0) {
int fit_w = img_w_orig; int fit_h = img_h_orig;
if (fit_w > win_w - 60) { fit_h = fit_h * (win_w - 60) / fit_w; fit_w = win_w - 60; }
if (fit_h > 400) { fit_w = fit_w * 400 / fit_h; fit_h = 400; }
if (frame_count > 1 && delays) {
el->img_frames = malloc(frame_count * sizeof(uint32_t *));
el->img_delays = malloc(frame_count * sizeof(int));
el->img_frame_count = frame_count;
el->img_current_frame = 0;
el->next_frame_tick = sys_system(16, 0, 0, 0, 0) + (delays[0] * 60 / 1000);
for (int i = 0; i < frame_count; i++) {
el->img_frames[i] = malloc(fit_w * fit_h * sizeof(uint32_t));
if (el->img_frames[i]) {
unsigned char *src_frame = rgba + (i * img_w_orig * img_h_orig * 4);
for (int y = 0; y < fit_h; y++) {
int sy = y * img_h_orig / fit_h;
for (int x = 0; x < fit_w; x++) {
int sx = x * img_w_orig / fit_w;
int idx = (sy * img_w_orig + sx) * 4;
uint32_t r = src_frame[idx];
uint32_t g = src_frame[idx+1];
uint32_t b = src_frame[idx+2];
uint32_t a = src_frame[idx+3];
el->img_frames[i][y * fit_w + x] = (a << 24) | (r << 16) | (g << 8) | b;
}
}
}
el->img_delays[i] = delays[i];
}
el->img_w = fit_w; el->img_h = fit_h;
free(delays);
} else {
el->img_pixels = malloc(fit_w * fit_h * sizeof(uint32_t)); el->img_pixels = malloc(fit_w * fit_h * sizeof(uint32_t));
if (el->img_pixels) { if (el->img_pixels) {
for (int y = 0; y < fit_h; y++) { for (int y = 0; y < fit_h; y++) {
int sy = y * img_h_orig / fit_h; int sy = y * img_h_orig / fit_h;
for (int x = 0; x < fit_w; x++) { for (int x = 0; x < fit_w; x++) {
int sx = x * img_w_orig / fit_w; int sx = x * img_w_orig / fit_w;
int idx = (sy * img_w_orig + sx) * 3; int idx = (sy * img_w_orig + sx) * 4;
el->img_pixels[y * fit_w + x] = 0xFF000000 | (rgb[idx] << 16) | (rgb[idx+1] << 8) | rgb[idx+2]; uint32_t r = rgba[idx];
uint32_t g = rgba[idx+1];
uint32_t b = rgba[idx+2];
uint32_t a = rgba[idx+3];
el->img_pixels[y * fit_w + x] = (a << 24) | (r << 16) | (g << 8) | b;
} }
} }
el->img_w = fit_w; el->img_h = fit_h; el->img_w = fit_w; el->img_h = fit_h;
} }
} }
stbi_image_free(rgba);
} }
njDone();
} }
static int decode_chunked_bin(char *body, int total_len) { static int decode_chunked_bin(char *body, int total_len) {
@ -347,6 +418,11 @@ static void load_image(RenderElement *el) {
char *u = url; char *u = url;
const char *s = "http://"; while(*s) *u++ = *s++; const char *s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++; s = current_host; while(*s) *u++ = *s++;
if (current_port != 80) {
*u++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
const char* ps = pbuf; while(*ps) *u++ = *ps++;
}
if (el->attr_value[0] != '/') *u++ = '/'; if (el->attr_value[0] != '/') *u++ = '/';
s = el->attr_value; while(*s) *u++ = *s++; s = el->attr_value; while(*s) *u++ = *s++;
*u = 0; *u = 0;
@ -361,8 +437,14 @@ static void load_image(RenderElement *el) {
if (strstr(img_resp, "Transfer-Encoding: chunked")) { if (strstr(img_resp, "Transfer-Encoding: chunked")) {
body_len = decode_chunked_bin(body, body_len); body_len = decode_chunked_bin(body, body_len);
} }
decode_jpeg((unsigned char*)body, body_len, el); decode_image((unsigned char*)body, body_len, el);
} }
if (el->img_pixels) {
el->w = el->img_w;
el->h = el->img_h;
}
el->img_loading = false;
if (!el->img_pixels) el->img_failed = true;
} }
static int line_elements[512]; static int line_elements[512];
@ -589,9 +671,15 @@ static void parse_html(const char *html) {
browser_clear(); browser_clear();
list_depth = 0; list_depth = 0;
cur_line_y = 10; cur_line_x = 10; line_element_count = 0; cur_line_y = 10; cur_line_x = 10; line_element_count = 0;
int i = 0; int center_depth = 0; int table_depth = 0; int blockquote_depth = 0; bool is_bold = false; bool is_italic = false; bool is_underline = false; uint32_t current_color = COLOR_TEXT; char current_link[256] = ""; int i = 0; int center_depth = 0; int table_depth = 0; int blockquote_depth = 0; bool is_bold = false; bool is_italic = false; bool is_underline = false;
#define EFF_CENTER ((center_depth > 0) && (table_depth == 0)) uint32_t current_color = COLOR_TEXT;
char current_link[256] = "";
float current_scale = 15.0f; float base_scale = 15.0f; float current_scale = 15.0f; float base_scale = 15.0f;
FontState font_stack[MAX_FONT_STACK];
int font_ptr = 0;
#define EFF_CENTER ((center_depth > 0) && (table_depth == 0))
bool is_space_pending = false; bool is_space_pending = false;
char current_form_action[256] = ""; int current_form_id = 0; char current_form_action[256] = ""; int current_form_id = 0;
bool skip_content = false; bool skip_content = false;
@ -644,7 +732,16 @@ static void parse_html(const char *html) {
else if (str_iequals(tag_name+1, "a")) current_link[0] = 0; else if (str_iequals(tag_name+1, "a")) current_link[0] = 0;
else if (str_iequals(tag_name+1, "p") || str_iequals(tag_name+1, "li") || str_iequals(tag_name+1, "div") || str_iequals(tag_name+1, "address")) emit_br(); else if (str_iequals(tag_name+1, "p") || str_iequals(tag_name+1, "li") || str_iequals(tag_name+1, "div") || str_iequals(tag_name+1, "address")) emit_br();
else if (str_iequals(tag_name+1, "pre")) { emit_br(); is_pre = false; } else if (str_iequals(tag_name+1, "pre")) { emit_br(); is_pre = false; }
else if (str_iequals(tag_name+1, "font") || str_iequals(tag_name+1, "tt") || str_iequals(tag_name+1, "code") || str_iequals(tag_name+1, "samp") || str_iequals(tag_name+1, "kbd")) { current_color = COLOR_TEXT; current_scale = base_scale; } else if (str_iequals(tag_name+1, "font") || str_iequals(tag_name+1, "tt") || str_iequals(tag_name+1, "code") || str_iequals(tag_name+1, "samp") || str_iequals(tag_name+1, "kbd")) {
if (font_ptr > 0) {
font_ptr--;
current_color = font_stack[font_ptr].color;
current_scale = font_stack[font_ptr].scale;
} else {
current_color = COLOR_TEXT;
current_scale = base_scale;
}
}
else if (str_iequals(tag_name+1, "head") || str_iequals(tag_name+1, "script") || str_iequals(tag_name+1, "style") || str_iequals(tag_name+1, "noscript")) skip_content = false; else if (str_iequals(tag_name+1, "head") || str_iequals(tag_name+1, "script") || str_iequals(tag_name+1, "style") || str_iequals(tag_name+1, "noscript")) skip_content = false;
else if (str_iequals(tag_name+1, "title")) { else if (str_iequals(tag_name+1, "title")) {
inside_title = false; inside_title = false;
@ -663,7 +760,7 @@ static void parse_html(const char *html) {
else if (str_iequals(tag_name, "dd")) { else if (str_iequals(tag_name, "dd")) {
emit_br(); emit_br();
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_NONE; el->tag = TAG_NONE;
el->content[0] = ' '; el->content[1] = ' '; el->content[2] = ' '; el->content[3] = ' '; el->content[4] = 0; el->content[0] = ' '; el->content[1] = ' '; el->content[2] = ' '; el->content[3] = ' '; el->content[4] = 0;
el->w = ui_get_string_width_scaled(el->content, current_scale); el->w = ui_get_string_width_scaled(el->content, current_scale);
@ -675,7 +772,14 @@ static void parse_html(const char *html) {
else if (str_iequals(tag_name, "b") || str_iequals(tag_name, "strong")) is_bold = true; else if (str_iequals(tag_name, "b") || str_iequals(tag_name, "strong")) is_bold = true;
else if (str_iequals(tag_name, "i") || str_iequals(tag_name, "em") || str_iequals(tag_name, "cite") || str_iequals(tag_name, "var")) is_italic = true; else if (str_iequals(tag_name, "i") || str_iequals(tag_name, "em") || str_iequals(tag_name, "cite") || str_iequals(tag_name, "var")) is_italic = true;
else if (str_iequals(tag_name, "u")) is_underline = true; else if (str_iequals(tag_name, "u")) is_underline = true;
else if (str_iequals(tag_name, "tt") || str_iequals(tag_name, "code") || str_iequals(tag_name, "samp") || str_iequals(tag_name, "kbd")) { current_scale = 14.0f; } else if (str_iequals(tag_name, "tt") || str_iequals(tag_name, "code") || str_iequals(tag_name, "samp") || str_iequals(tag_name, "kbd")) {
if (font_ptr < MAX_FONT_STACK) {
font_stack[font_ptr].color = current_color;
font_stack[font_ptr].scale = current_scale;
font_ptr++;
}
current_scale = 14.0f;
}
else if (str_iequals(tag_name, "address")) { emit_br(); } else if (str_iequals(tag_name, "address")) { emit_br(); }
else if (str_iequals(tag_name, "html") || str_iequals(tag_name, "body")) skip_content = false; else if (str_iequals(tag_name, "html") || str_iequals(tag_name, "body")) skip_content = false;
else if (str_iequals(tag_name, "head")) skip_content = true; else if (str_iequals(tag_name, "head")) skip_content = true;
@ -690,6 +794,11 @@ static void parse_html(const char *html) {
current_scale = base_scale; current_scale = base_scale;
} }
else if (str_iequals(tag_name, "font")) { else if (str_iequals(tag_name, "font")) {
if (font_ptr < MAX_FONT_STACK) {
font_stack[font_ptr].color = current_color;
font_stack[font_ptr].scale = current_scale;
font_ptr++;
}
char *color_str = str_istrstr(attr_buf, "color=\""); char *color_str = str_istrstr(attr_buf, "color=\"");
if (color_str) { if (color_str) {
current_color = parse_html_color(color_str + 7); current_color = parse_html_color(color_str + 7);
@ -736,7 +845,7 @@ static void parse_html(const char *html) {
else if (str_iequals(tag_name, "li")) { else if (str_iequals(tag_name, "li")) {
emit_br(); emit_br();
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_NONE; el->tag = TAG_NONE;
if (list_depth > 0 && list_type[list_depth - 1] == 1) { // OL if (list_depth > 0 && list_type[list_depth - 1] == 1) { // OL
@ -782,7 +891,7 @@ static void parse_html(const char *html) {
} else if (str_iequals(tag_name, "hr")) { } else if (str_iequals(tag_name, "hr")) {
emit_br(); emit_br();
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_HR; el->tag = TAG_HR;
el->list_depth = list_depth; el->list_depth = list_depth;
el->blockquote_depth = blockquote_depth; // Set blockquote depth el->blockquote_depth = blockquote_depth; // Set blockquote depth
@ -792,19 +901,19 @@ static void parse_html(const char *html) {
emit_br(); emit_br();
} else if (str_iequals(tag_name, "img")) { } else if (str_iequals(tag_name, "img")) {
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_IMG; el->w = 100; el->h = 80; el->centered = EFF_CENTER; el->tag = TAG_IMG; el->w = 100; el->h = 80; el->centered = EFF_CENTER;
char *src = str_istrstr(attr_buf, "src=\""); char *src = str_istrstr(attr_buf, "src=\"");
if (src) { if (src) {
src += 5; int l = 0; src += 5; int l = 0;
while(src[l] && src[l] != '\"' && l < 255) { el->attr_value[l] = src[l]; l++; } while(src[l] && src[l] != '\"' && l < 255) { el->attr_value[l] = src[l]; l++; }
el->attr_value[l] = 0; load_image(el); el->attr_value[l] = 0; el->img_loading = true; // Deferred load
} }
if (el->img_pixels) { el->w = el->img_w; el->h = el->img_h; } if (el->img_pixels) { el->w = el->img_w; el->h = el->img_h; }
el->blockquote_depth = blockquote_depth; // Set blockquote depth el->blockquote_depth = blockquote_depth; // Set blockquote depth
} else if (str_iequals(tag_name, "input")) { } else if (str_iequals(tag_name, "input")) {
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_INPUT; el->w = 160; el->h = 20; el->centered = EFF_CENTER; el->tag = TAG_INPUT; el->w = 160; el->h = 20; el->centered = EFF_CENTER;
char *val = str_istrstr(attr_buf, "value=\""); char *val = str_istrstr(attr_buf, "value=\"");
char *ph = str_istrstr(attr_buf, "placeholder=\""); char *ph = str_istrstr(attr_buf, "placeholder=\"");
@ -858,7 +967,7 @@ static void parse_html(const char *html) {
} else { } else {
int word_w = ui_get_string_width_scaled(word, current_scale); int word_w = ui_get_string_width_scaled(word, current_scale);
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0; int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0;
el->w = word_w; el->h = ui_get_font_height_scaled(current_scale); el->w = word_w; el->h = ui_get_font_height_scaled(current_scale);
el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color; el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color;
@ -884,7 +993,7 @@ static void parse_html(const char *html) {
} else { } else {
int word_w = ui_get_string_width_scaled(word, current_scale); int word_w = ui_get_string_width_scaled(word, current_scale);
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0; int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0;
el->w = word_w; el->h = ui_get_font_height_scaled(current_scale); el->w = word_w; el->h = ui_get_font_height_scaled(current_scale);
el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color; el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color;
@ -902,7 +1011,7 @@ static void parse_html(const char *html) {
is_space_pending = false; is_space_pending = false;
if (element_count < MAX_ELEMENTS && !inside_title) { if (element_count < MAX_ELEMENTS && !inside_title) {
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_NONE; el->content[0] = ' '; el->content[1] = 0; el->tag = TAG_NONE; el->content[0] = ' '; el->content[1] = 0;
el->w = ui_get_string_width_scaled(" ", current_scale); el->w = ui_get_string_width_scaled(" ", current_scale);
el->h = ui_get_font_height_scaled(current_scale); el->h = ui_get_font_height_scaled(current_scale);
@ -926,7 +1035,7 @@ static void parse_html(const char *html) {
if (element_count < MAX_ELEMENTS) { if (element_count < MAX_ELEMENTS) {
int word_w = ui_get_string_width_scaled(word, current_scale); int word_w = ui_get_string_width_scaled(word, current_scale);
RenderElement *el = &elements[element_count++]; RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; memset(el, 0, sizeof(RenderElement));
int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0; int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0;
el->w = word_w; el->h = ui_get_font_height_scaled(current_scale); el->w = word_w; el->h = ui_get_font_height_scaled(current_scale);
el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color; el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color;
@ -1025,7 +1134,16 @@ static void parse_html_incremental(const char *html, int safe_len) {
else if (str_iequals(tag_name+1, "a")) current_link[0] = 0; else if (str_iequals(tag_name+1, "a")) current_link[0] = 0;
else if (str_iequals(tag_name+1, "p") || str_iequals(tag_name+1, "li") || str_iequals(tag_name+1, "div")) emit_br(); else if (str_iequals(tag_name+1, "p") || str_iequals(tag_name+1, "li") || str_iequals(tag_name+1, "div")) emit_br();
else if (str_iequals(tag_name+1, "pre")) { emit_br(); is_pre = false; } else if (str_iequals(tag_name+1, "pre")) { emit_br(); is_pre = false; }
else if (str_iequals(tag_name+1, "font") || str_iequals(tag_name+1, "tt") || str_iequals(tag_name+1, "code") || str_iequals(tag_name+1, "samp") || str_iequals(tag_name+1, "kbd")) { current_color = COLOR_TEXT; current_scale = base_scale; } else if (str_iequals(tag_name+1, "font") || str_iequals(tag_name+1, "tt") || str_iequals(tag_name+1, "code") || str_iequals(tag_name+1, "samp") || str_iequals(tag_name+1, "kbd")) {
if (inc_font_ptr > 0) {
inc_font_ptr--;
current_color = inc_font_stack[inc_font_ptr].color;
current_scale = inc_font_stack[inc_font_ptr].scale;
} else {
current_color = COLOR_TEXT;
current_scale = base_scale;
}
}
else if (str_iequals(tag_name+1, "head") || str_iequals(tag_name+1, "script") || str_iequals(tag_name+1, "style") || str_iequals(tag_name+1, "noscript")) skip_content = false; else if (str_iequals(tag_name+1, "head") || str_iequals(tag_name+1, "script") || str_iequals(tag_name+1, "style") || str_iequals(tag_name+1, "noscript")) skip_content = false;
else if (str_iequals(tag_name+1, "title")) { else if (str_iequals(tag_name+1, "title")) {
inside_title = false; inside_title = false;
@ -1041,7 +1159,7 @@ static void parse_html_incremental(const char *html, int safe_len) {
else if (str_iequals(tag_name, "dl")) { emit_br(); list_type[list_depth] = 2; list_depth++; } else if (str_iequals(tag_name, "dl")) { emit_br(); list_type[list_depth] = 2; list_depth++; }
else if (str_iequals(tag_name, "dt")) { emit_br(); is_bold = true; } else if (str_iequals(tag_name, "dt")) { emit_br(); is_bold = true; }
else if (str_iequals(tag_name, "dd")) { else if (str_iequals(tag_name, "dd")) {
emit_br(); RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; emit_br(); RenderElement *el = &elements[element_count++]; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_NONE; el->content[0] = ' '; el->content[1] = ' '; el->content[2] = ' '; el->content[3] = ' '; el->content[4] = 0; el->tag = TAG_NONE; el->content[0] = ' '; el->content[1] = ' '; el->content[2] = ' '; el->content[3] = ' '; el->content[4] = 0;
el->w = ui_get_string_width_scaled(el->content, current_scale); el->h = ui_get_font_height_scaled(current_scale); el->color = current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth; el->w = ui_get_string_width_scaled(el->content, current_scale); el->h = ui_get_font_height_scaled(current_scale); el->color = current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth;
} }
@ -1049,13 +1167,25 @@ static void parse_html_incremental(const char *html, int safe_len) {
else if (str_iequals(tag_name, "i") || str_iequals(tag_name, "em") || str_iequals(tag_name, "cite") || str_iequals(tag_name, "var")) is_italic = true; else if (str_iequals(tag_name, "i") || str_iequals(tag_name, "em") || str_iequals(tag_name, "cite") || str_iequals(tag_name, "var")) is_italic = true;
else if (str_iequals(tag_name, "u")) is_underline = true; else if (str_iequals(tag_name, "u")) is_underline = true;
else if (str_iequals(tag_name, "address")) emit_br(); else if (str_iequals(tag_name, "address")) emit_br();
else if (str_iequals(tag_name, "tt") || str_iequals(tag_name, "code") || str_iequals(tag_name, "samp") || str_iequals(tag_name, "kbd")) current_scale = 14.0f; else if (str_iequals(tag_name, "tt") || str_iequals(tag_name, "code") || str_iequals(tag_name, "samp") || str_iequals(tag_name, "kbd")) {
if (inc_font_ptr < MAX_FONT_STACK) {
inc_font_stack[inc_font_ptr].color = current_color;
inc_font_stack[inc_font_ptr].scale = current_scale;
inc_font_ptr++;
}
current_scale = 14.0f;
}
else if (tag_name[0] == 'h' && tag_name[1] >= '1' && tag_name[1] <= '6') { else if (tag_name[0] == 'h' && tag_name[1] >= '1' && tag_name[1] <= '6') {
emit_br(); emit_br(); is_bold = true; emit_br(); emit_br(); is_bold = true;
if (tag_name[1] == '1') base_scale = 32.0f; else if (tag_name[1] == '2') base_scale = 24.0f; else if (tag_name[1] == '3') base_scale = 20.0f; else base_scale = 18.0f; if (tag_name[1] == '1') base_scale = 32.0f; else if (tag_name[1] == '2') base_scale = 24.0f; else if (tag_name[1] == '3') base_scale = 20.0f; else base_scale = 18.0f;
current_scale = base_scale; current_scale = base_scale;
} }
else if (str_iequals(tag_name, "font")) { else if (str_iequals(tag_name, "font")) {
if (inc_font_ptr < MAX_FONT_STACK) {
inc_font_stack[inc_font_ptr].color = current_color;
inc_font_stack[inc_font_ptr].scale = current_scale;
inc_font_ptr++;
}
char *color_str = str_istrstr(attr_buf, "color=\""); char *color_str = str_istrstr(attr_buf, "color=\"");
if (color_str) current_color = parse_html_color(color_str + 7); else { color_str = str_istrstr(attr_buf, "color="); if (color_str) current_color = parse_html_color(color_str + 6); } if (color_str) current_color = parse_html_color(color_str + 7); else { color_str = str_istrstr(attr_buf, "color="); if (color_str) current_color = parse_html_color(color_str + 6); }
char *size_str = str_istrstr(attr_buf, "size=\""); int offset = 0; if (size_str) offset = 6; else { size_str = str_istrstr(attr_buf, "size="); if (size_str) offset = 5; } char *size_str = str_istrstr(attr_buf, "size=\""); int offset = 0; if (size_str) offset = 6; else { size_str = str_istrstr(attr_buf, "size="); if (size_str) offset = 5; }
@ -1070,7 +1200,7 @@ static void parse_html_incremental(const char *html, int safe_len) {
else if (str_iequals(tag_name, "p") || str_iequals(tag_name, "div")) emit_br(); else if (str_iequals(tag_name, "p") || str_iequals(tag_name, "div")) emit_br();
else if (str_iequals(tag_name, "pre")) { emit_br(); is_pre = true; current_scale = 14.0f; } else if (str_iequals(tag_name, "pre")) { emit_br(); is_pre = true; current_scale = 14.0f; }
else if (str_iequals(tag_name, "li")) { else if (str_iequals(tag_name, "li")) {
emit_br(); RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; emit_br(); RenderElement *el = &elements[element_count++]; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_NONE; if (list_depth > 0 && list_type[list_depth - 1] == 1) { char num[16]; itoa(list_index[list_depth - 1]++, num); int l=0; while(num[l]) { el->content[l] = num[l]; l++; } el->content[l++] = '.'; el->content[l++] = ' '; el->content[l] = 0; } el->tag = TAG_NONE; if (list_depth > 0 && list_type[list_depth - 1] == 1) { char num[16]; itoa(list_index[list_depth - 1]++, num); int l=0; while(num[l]) { el->content[l] = num[l]; l++; } el->content[l++] = '.'; el->content[l++] = ' '; el->content[l] = 0; }
else if (list_depth > 0 && list_type[list_depth - 1] == 2) { el->content[0] = ' '; el->content[1] = 0; } else { el->content[0] = '-'; el->content[1] = ' '; el->content[2] = 0; } else if (list_depth > 0 && list_type[list_depth - 1] == 2) { el->content[0] = ' '; el->content[1] = 0; } else { el->content[0] = '-'; el->content[1] = ' '; el->content[2] = 0; }
el->w = ui_get_string_width_scaled(el->content, current_scale); el->h = ui_get_font_height_scaled(current_scale); el->color = current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth; el->w = ui_get_string_width_scaled(el->content, current_scale); el->h = ui_get_font_height_scaled(current_scale); el->color = current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth;
@ -1083,8 +1213,8 @@ static void parse_html_incremental(const char *html, int safe_len) {
else if (str_iequals(tag_name, "hr")) { emit_br(); RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; el->tag = TAG_HR; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth; el->h = 10; el->centered = true; emit_br(); } else if (str_iequals(tag_name, "hr")) { emit_br(); RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; el->tag = TAG_HR; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth; el->h = 10; el->centered = true; emit_br(); }
else if (str_iequals(tag_name, "img")) { else if (str_iequals(tag_name, "img")) {
RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; el->tag = TAG_IMG; el->w = 100; el->h = 80; el->centered = EFF_CENTER; RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; el->tag = TAG_IMG; el->w = 100; el->h = 80; el->centered = EFF_CENTER;
char *src = str_istrstr(attr_buf, "src=\""); if (src) { src += 5; int l = 0; while(src[l] && src[l] != '"' && l < 255) { el->attr_value[l] = src[l]; l++; } el->attr_value[l] = 0; load_image(el); } char *src = str_istrstr(attr_buf, "src=\""); if (src) { src += 5; int l = 0; while(src[l] && src[l] != '"' && l < 255) { el->attr_value[l] = src[l]; l++; } el->attr_value[l] = 0; el->img_loading = true; }
if (el->img_pixels) { el->w = el->img_w; el->h = el->img_h; } el->blockquote_depth = blockquote_depth; el->blockquote_depth = blockquote_depth;
} }
else if (str_iequals(tag_name, "input")) { else if (str_iequals(tag_name, "input")) {
RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; el->tag = TAG_INPUT; el->w = 160; el->h = 20; el->centered = EFF_CENTER; RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; el->tag = TAG_INPUT; el->w = 160; el->h = 20; el->centered = EFF_CENTER;
@ -1107,7 +1237,7 @@ static void parse_html_incremental(const char *html, int safe_len) {
if (html[i] == '\n' || html[i] == '\r') { if (html[i] == '\n' || html[i] == '\r') {
if (w_idx > 0) { if (w_idx > 0) {
word[w_idx] = 0; decode_html_entities(word); int word_w = ui_get_string_width_scaled(word, current_scale); word[w_idx] = 0; decode_html_entities(word); int word_w = ui_get_string_width_scaled(word, current_scale);
RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; RenderElement *el = &elements[element_count++]; memset(el, 0, sizeof(RenderElement));
int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0; int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0;
el->w = word_w; el->h = ui_get_font_height_scaled(current_scale); el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth; el->w = word_w; el->h = ui_get_font_height_scaled(current_scale); el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth;
if (current_link[0]) { int k=0; while(current_link[k]) { el->link_url[k] = current_link[k]; k++; } el->link_url[k] = 0; } if (current_link[0]) { int k=0; while(current_link[k]) { el->link_url[k] = current_link[k]; k++; } el->link_url[k] = 0; }
@ -1118,7 +1248,7 @@ static void parse_html_incremental(const char *html, int safe_len) {
} }
if (w_idx > 0) { if (w_idx > 0) {
word[w_idx] = 0; decode_html_entities(word); int word_w = ui_get_string_width_scaled(word, current_scale); word[w_idx] = 0; decode_html_entities(word); int word_w = ui_get_string_width_scaled(word, current_scale);
RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; RenderElement *el = &elements[element_count++]; memset(el, 0, sizeof(RenderElement));
int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0; int k=0; while(word[k]) { el->content[k] = word[k]; k++; } el->content[k] = 0;
el->w = word_w; el->h = ui_get_font_height_scaled(current_scale); el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth; el->w = word_w; el->h = ui_get_font_height_scaled(current_scale); el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth;
if (current_link[0]) { int k=0; while(current_link[k]) { el->link_url[k] = current_link[k]; k++; } el->link_url[k] = 0; } if (current_link[0]) { int k=0; while(current_link[k]) { el->link_url[k] = current_link[k]; k++; } el->link_url[k] = 0; }
@ -1130,7 +1260,7 @@ static void parse_html_incremental(const char *html, int safe_len) {
if (is_space_pending) { if (is_space_pending) {
is_space_pending = false; is_space_pending = false;
if (element_count < MAX_ELEMENTS) { if (element_count < MAX_ELEMENTS) {
RenderElement *el = &elements[element_count++]; for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0; RenderElement *el = &elements[element_count++]; memset(el, 0, sizeof(RenderElement));
el->tag = TAG_NONE; el->content[0] = ' '; el->content[1] = 0; el->w = ui_get_string_width_scaled(" ", current_scale); el->h = ui_get_font_height_scaled(current_scale); el->color = current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth; el->tag = TAG_NONE; el->content[0] = ' '; el->content[1] = 0; el->w = ui_get_string_width_scaled(" ", current_scale); el->h = ui_get_font_height_scaled(current_scale); el->color = current_color; el->centered = EFF_CENTER; el->bold = is_bold; el->italic = is_italic; el->underline = is_underline; el->scale = current_scale; el->list_depth = list_depth; el->blockquote_depth = blockquote_depth;
} }
} }
@ -1186,7 +1316,9 @@ static void browser_paint(void) {
int draw_y = el->y - scroll_y + URL_BAR_H; int draw_y = el->y - scroll_y + URL_BAR_H;
if (draw_y < URL_BAR_H - 400 || draw_y > win_h) continue; if (draw_y < URL_BAR_H - 400 || draw_y > win_h) continue;
if (el->tag == TAG_IMG) { if (el->tag == TAG_IMG) {
if (el->img_pixels) ui_draw_image(win_browser, el->x, draw_y, el->img_w, el->img_h, el->img_pixels); uint32_t *pixels = el->img_pixels;
if (el->img_frames) pixels = el->img_frames[el->img_current_frame];
if (pixels) ui_draw_image(win_browser, el->x, draw_y, el->img_w, el->img_h, pixels);
else ui_draw_rect(win_browser, el->x, draw_y, 100, 80, 0xFFCCCCCC); else ui_draw_rect(win_browser, el->x, draw_y, 100, 80, 0xFFCCCCCC);
} else if (el->tag == TAG_INPUT) { } else if (el->tag == TAG_INPUT) {
ui_draw_rect(win_browser, el->x, draw_y, el->w, el->h, 0xFFFFFFFF); ui_draw_rect(win_browser, el->x, draw_y, el->w, el->h, 0xFFFFFFFF);
@ -1228,7 +1360,9 @@ static void browser_paint(void) {
ui_draw_rect(win_browser, el->x, draw_y + el->h / 2, el->w, 2, 0xFF888888); ui_draw_rect(win_browser, el->x, draw_y + el->h / 2, el->w, 2, 0xFF888888);
ui_draw_rect(win_browser, el->x, draw_y + (el->h / 2) + 2, el->w, 1, 0xFFFFFFFF); ui_draw_rect(win_browser, el->x, draw_y + (el->h / 2) + 2, el->w, 1, 0xFFFFFFFF);
} else if (el->tag == TAG_NONE) { } else if (el->tag == TAG_NONE) {
ui_draw_string_scaled(win_browser, el->x, draw_y, el->content, el->color, el->scale); if (el->content[0] != ' ' || el->content[1] != 0) {
ui_draw_string_scaled(win_browser, el->x, draw_y, el->content, el->color, el->scale);
}
if (el->bold) { if (el->bold) {
ui_draw_string_scaled(win_browser, el->x + 1, draw_y, el->content, el->color, el->scale); ui_draw_string_scaled(win_browser, el->x + 1, draw_y, el->content, el->color, el->scale);
} }
@ -1557,6 +1691,37 @@ int main(int argc, char **argv) {
browser_reflow(); browser_paint(); ui_mark_dirty(win_browser, 0, 0, win_w, win_h); browser_reflow(); browser_paint(); ui_mark_dirty(win_browser, 0, 0, win_w, win_h);
needs_repaint = false; needs_repaint = false;
} }
// Background image loading
bool loaded_any = false;
for (int i = 0; i < element_count; i++) {
if (elements[i].tag == TAG_IMG && elements[i].img_loading && !elements[i].img_pixels && !elements[i].img_failed) {
load_image(&elements[i]);
loaded_any = true;
break; // Load one at a time to stay responsive
}
}
if (loaded_any) {
browser_reflow(); browser_paint(); ui_mark_dirty(win_browser, 0, 0, win_w, win_h);
}
// Animated GIF progress
bool gif_updated = false;
long long now = sys_system(16, 0, 0, 0, 0);
for (int i = 0; i < element_count; i++) {
if (elements[i].tag == TAG_IMG && elements[i].img_frames && elements[i].img_frame_count > 1) {
if (now >= elements[i].next_frame_tick) {
elements[i].img_current_frame = (elements[i].img_current_frame + 1) % elements[i].img_frame_count;
elements[i].next_frame_tick = now + (elements[i].img_delays[elements[i].img_current_frame] * 60 / 1000);
if (elements[i].next_frame_tick <= now) elements[i].next_frame_tick = now + 1;
gif_updated = true;
}
}
}
if (gif_updated) {
browser_paint(); ui_mark_dirty(win_browser, 0, 0, win_w, win_h);
}
for(volatile int x=0; x<10000; x++); for(volatile int x=0; x<10000; x++);
} }
return 0; return 0;

6
src/kernel/userland/libc/string.h Normal file
View file

@ -0,0 +1,6 @@
#ifndef BOREDOS_LIBC_STRING_H
#define BOREDOS_LIBC_STRING_H
#include <stdlib.h>
#endif

967
src/kernel/userland/nanojpeg.c
View file

@ -1,967 +0,0 @@
// NanoJPEG -- KeyJ's Tiny Baseline JPEG Decoder
// version 1.3 (2012-03-05)
// by Martin J. Fiedler <martin.fiedler@gmx.net>
//
// This software is published under the terms of KeyJ's Research License,
// version 0.2. Usage of this software is subject to the following conditions:
// 0. There's no warranty whatsoever. The author(s) of this software can not
// be held liable for any damages that occur when using this software.
// 1. This software may be used freely for both non-commercial and commercial
// purposes.
// 2. This software may be redistributed freely as long as no fees are charged
// for the distribution and this license information is included.
// 3. This software may be modified freely except for this license information,
// which must not be changed in any way.
// 4. If anything other than configuration, indentation or comments have been
// altered in the code, the original author(s) must receive a copy of the
// modified code.
///////////////////////////////////////////////////////////////////////////////
// DOCUMENTATION SECTION //
// read this if you want to know what this is all about //
///////////////////////////////////////////////////////////////////////////////
// INTRODUCTION
// ============
//
// This is a minimal decoder for baseline JPEG images. It accepts memory dumps
// of JPEG files as input and generates either 8-bit grayscale or packed 24-bit
// RGB images as output. It does not parse JFIF or Exif headers; all JPEG files
// are assumed to be either grayscale or YCbCr. CMYK or other color spaces are
// not supported. All YCbCr subsampling schemes with power-of-two ratios are
// supported, as are restart intervals. Progressive or lossless JPEG is not
// supported.
// Summed up, NanoJPEG should be able to decode all images from digital cameras
// and most common forms of other non-progressive JPEG images.
// The decoder is not optimized for speed, it's optimized for simplicity and
// small code. Image quality should be at a reasonable level. A bicubic chroma
// upsampling filter ensures that subsampled YCbCr images are rendered in
// decent quality. The decoder is not meant to deal with broken JPEG files in
// a graceful manner; if anything is wrong with the bitstream, decoding will
// simply fail.
// The code should work with every modern C compiler without problems and
// should not emit any warnings. It uses only (at least) 32-bit integer
// arithmetic and is supposed to be endianness independent and 64-bit clean.
// However, it is not thread-safe.
// COMPILE-TIME CONFIGURATION
// ==========================
//
// The following aspects of NanoJPEG can be controlled with preprocessor
// defines:
//
// _NJ_EXAMPLE_PROGRAM = Compile a main() function with an example
// program.
// _NJ_INCLUDE_HEADER_ONLY = Don't compile anything, just act as a header
// file for NanoJPEG. Example:
// #define _NJ_INCLUDE_HEADER_ONLY
// #include "nanojpeg.c"
// int main(void) {
// njInit();
// // your code here
// njDone();
// }
// NJ_USE_LIBC=1 = Use the malloc(), free(), memset() and memcpy()
// functions from the standard C library (default).
// NJ_USE_LIBC=0 = Don't use the standard C library. In this mode,
// external functions njAlloc(), njFreeMem(),
// njFillMem() and njCopyMem() need to be defined
// and implemented somewhere.
// NJ_USE_WIN32=0 = Normal mode (default).
// NJ_USE_WIN32=1 = If compiling with MSVC for Win32 and
// NJ_USE_LIBC=0, NanoJPEG will use its own
// implementations of the required C library
// functions (default if compiling with MSVC and
// NJ_USE_LIBC=0).
// NJ_CHROMA_FILTER=1 = Use the bicubic chroma upsampling filter
// (default). // 图像resize的一种算法
// NJ_CHROMA_FILTER=0 = Use simple pixel repetition for chroma upsampling
// (bad quality, but faster and less code).
// API
// ===
//
// For API documentation, read the "header section" below.
// EXAMPLE
// =======
//
// A few pages below, you can find an example program that uses NanoJPEG to
// convert JPEG files into PGM or PPM. To compile it, use something like
// gcc -O3 -D_NJ_EXAMPLE_PROGRAM -o nanojpeg nanojpeg.c
// You may also add -std=c99 -Wall -Wextra -pedantic -Werror, if you want :)
///////////////////////////////////////////////////////////////////////////////
// HEADER SECTION //
// copy and pase this into nanojpeg.h if you want //
///////////////////////////////////////////////////////////////////////////////
#ifndef _NANOJPEG_H
#define _NANOJPEG_H
// nj_result_t: Result codes for njDecode().
typedef enum _nj_result {
NJ_OK = 0, // no error, decoding successful
NJ_NO_JPEG, // not a JPEG file
NJ_UNSUPPORTED, // unsupported format
NJ_OUT_OF_MEM, // out of memory
NJ_INTERNAL_ERR, // internal error
NJ_SYNTAX_ERROR, // syntax error
__NJ_FINISHED, // used internally, will never be reported
} nj_result_t;
// njInit: Initialize NanoJPEG.
// For safety reasons, this should be called at least one time before using
// using any of the other NanoJPEG functions.
void njInit(void);
// njDecode: Decode a JPEG image.
// Decodes a memory dump of a JPEG file into internal buffers.
// Parameters:
// jpeg = The pointer to the memory dump.
// size = The size of the JPEG file.
// Return value: The error code in case of failure, or NJ_OK (zero) on success.
nj_result_t njDecode(const void* jpeg, const int size);
// njGetWidth: Return the width (in pixels) of the most recently decoded
// image. If njDecode() failed, the result of njGetWidth() is undefined.
int njGetWidth(void);
// njGetHeight: Return the height (in pixels) of the most recently decoded
// image. If njDecode() failed, the result of njGetHeight() is undefined.
int njGetHeight(void);
// njIsColor: Return 1 if the most recently decoded image is a color image
// (RGB) or 0 if it is a grayscale image. If njDecode() failed, the result
// of njGetWidth() is undefined.
int njIsColor(void);
// njGetImage: Returns the decoded image data.
// Returns a pointer to the most recently image. The memory layout it byte-
// oriented, top-down, without any padding between lines. Pixels of color
// images will be stored as three consecutive bytes for the red, green and
// blue channels. This data format is thus compatible with the PGM or PPM
// file formats and the OpenGL texture formats GL_LUMINANCE8 or GL_RGB8.
// If njDecode() failed, the result of njGetImage() is undefined.
unsigned char* njGetImage(void);
// njGetImageSize: Returns the size (in bytes) of the image data returned
// by njGetImage(). If njDecode() failed, the result of njGetImageSize() is
// undefined.
int njGetImageSize(void);
// njDone: Uninitialize NanoJPEG.
// Resets NanoJPEG's internal state and frees all memory that has been
// allocated at run-time by NanoJPEG. It is still possible to decode another
// image after a njDone() call.
void njDone(void);
#endif//_NANOJPEG_H
///////////////////////////////////////////////////////////////////////////////
// CONFIGURATION SECTION //
// adjust the default settings for the NJ_ defines here //
///////////////////////////////////////////////////////////////////////////////
#ifndef NJ_USE_LIBC
#define NJ_USE_LIBC 1
#endif
#ifndef NJ_USE_WIN32
#ifdef _MSC_VER
#define NJ_USE_WIN32 (!NJ_USE_LIBC)
#else
#define NJ_USE_WIN32 0
#endif
#endif
#ifndef NJ_CHROMA_FILTER
#define NJ_CHROMA_FILTER 1
#endif
///////////////////////////////////////////////////////////////////////////////
// EXAMPLE PROGRAM //
// just define _NJ_EXAMPLE_PROGRAM to compile this (requires NJ_USE_LIBC) //
///////////////////////////////////////////////////////////////////////////////
#ifdef _NJ_EXAMPLE_PROGRAM
#include <stdio.h>
#include "libc/stdlib.h"
#include "libc/string.h"
int main(int argc, char* argv[]) {
int size;
char *buf;
FILE *f;
if (argc < 2) {
printf("Usage: %s <input.jpg> [<output.ppm>]\n", argv[0]);
return 2;
}
f = fopen(argv[1], "rb");
if (!f) {
printf("Error opening the input file.\n");
return 1;
}
fseek(f, 0, SEEK_END);
size = (int) ftell(f); // 字节
buf = malloc(size);
fseek(f, 0, SEEK_SET);
size = (int) fread(buf, 1, size, f); // 读取整个文件内容到buf
fclose(f);
njInit(); // 初始化nj_context_t
if (njDecode(buf, size)) {
printf("Error decoding the input file.\n");
return 1;
}
f = fopen((argc > 2) ? argv[2] : (njIsColor() ? "nanojpeg_out.ppm" : "nanojpeg_out.pgm"), "wb");
if (!f) {
printf("Error opening the output file.\n");
return 1;
}
fprintf(f, "P%d\n%d %d\n255\n", njIsColor() ? 6 : 5, njGetWidth(), njGetHeight());
fwrite(njGetImage(), 1, njGetImageSize(), f);
fclose(f);
njDone();
return 0;
}
#endif
// 解释什么是stride http://msdn.microsoft.com/en-us/library/windows/desktop/aa473780(v=vs.85).aspx
///////////////////////////////////////////////////////////////////////////////
// IMPLEMENTATION SECTION //
// you may stop reading here //
///////////////////////////////////////////////////////////////////////////////
#ifndef _NJ_INCLUDE_HEADER_ONLY
#include <stddef.h> // For NULL in freestanding mode
#ifdef _MSC_VER
#define NJ_INLINE static __inline
#define NJ_FORCE_INLINE static __forceinline
#else
#define NJ_INLINE static inline
#define NJ_FORCE_INLINE static inline
#endif
#if NJ_USE_LIBC
#include "libc/stdlib.h"
#define njAllocMem malloc
#define njFreeMem free
#define njFillMem memset
#define njCopyMem memcpy
#elif NJ_USE_WIN32
#include <windows.h>
#define njAllocMem(size) ((void*) LocalAlloc(LMEM_FIXED, (SIZE_T)(size)))
#define njFreeMem(block) ((void) LocalFree((HLOCAL) block))
NJ_INLINE void njFillMem(void* block, unsigned char value, int count) { __asm {
mov edi, block
mov al, value
mov ecx, count
rep stosb
} }
NJ_INLINE void njCopyMem(void* dest, const void* src, int count) { __asm {
mov edi, dest
mov esi, src
mov ecx, count
rep movsb
} }
#else
extern void* njAllocMem(int size);
extern void njFreeMem(void* block);
extern void njFillMem(void* block, unsigned char byte, int size);
extern void njCopyMem(void* dest, const void* src, int size);
#endif
typedef struct _nj_code {
unsigned char bits, code;
} nj_vlc_code_t;
typedef struct _nj_cmp {
int cid;
int ssx, ssy; // 水平/垂直因子
int width, height;
int stride;
int qtsel; // Quantization Table量化表
int actabsel, dctabsel; // AC/DC Huffman Table
int dcpred; // DC prediction
unsigned char *pixels;
} nj_component_t; // 颜色分量
typedef struct _nj_ctx {
nj_result_t error;
const unsigned char *pos; // 待解码数据指针(按字节来)
int size; // 整个数据的长度
int length; // 某一个marker内容的长度
int width, height; // 图片宽和高度
int mbwidth, mbheight; // MCU水平/垂直个数
int mbsizex, mbsizey; // MCU宽/高
int ncomp; // 颜色分量数
nj_component_t comp[3]; // YCbCr
int qtused, qtavail; // 这两个目前看不出来很大用处
unsigned char qtab[4][64]; // 但是目前似乎只有2个
nj_vlc_code_t vlctab[4][65536]; // 构造所有16位数的Huffman基数
// 目前基本上是4个(直/交/0/1)
int buf, bufbits; // 这是用来做什么的 buf是存放内容的 bufbits是计数器，存放了多少个bits
int block[64];
int rstinterval;
unsigned char *rgb; // 解析出来的RGB所要占用的内存 // 每1个点包含3个字节，按找RGB的顺序
} nj_context_t;
static nj_context_t nj;
static const char njZZ[64] = { 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18,
11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28, 35,
42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45,
38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63 };
/*
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31
32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47
48 49 50 51 52 53 54 55
56 57 58 59 60 61 62 63
*/
NJ_FORCE_INLINE unsigned char njClip(const int x) { // 限定范围是0 ~ 255之间
return (x < 0) ? 0 : ((x > 0xFF) ? 0xFF : (unsigned char) x);
}
#define W1 2841
#define W2 2676
#define W3 2408
#define W5 1609
#define W6 1108
#define W7 565
NJ_INLINE void njRowIDCT(int* blk) { // 按行来操作的 0 ~ 7 // 8 ~ 15
int x0, x1, x2, x3, x4, x5, x6, x7, x8;
if (!((x1 = blk[4] << 11)
| (x2 = blk[6])
| (x3 = blk[2])
| (x4 = blk[1])
| (x5 = blk[7])
| (x6 = blk[5])
| (x7 = blk[3])))
{
blk[0] = blk[1] = blk[2] = blk[3] = blk[4] = blk[5] = blk[6] = blk[7] = blk[0] << 3;
return;
}
x0 = (blk[0] << 11) + 128;
x8 = W7 * (x4 + x5);
x4 = x8 + (W1 - W7) * x4;
x5 = x8 - (W1 + W7) * x5;
x8 = W3 * (x6 + x7);
x6 = x8 - (W3 - W5) * x6;
x7 = x8 - (W3 + W5) * x7;
x8 = x0 + x1;
x0 -= x1;
x1 = W6 * (x3 + x2);
x2 = x1 - (W2 + W6) * x2;
x3 = x1 + (W2 - W6) * x3;
x1 = x4 + x6;
x4 -= x6;
x6 = x5 + x7;
x5 -= x7;
x7 = x8 + x3;
x8 -= x3;
x3 = x0 + x2;
x0 -= x2;
x2 = (181 * (x4 + x5) + 128) >> 8;
x4 = (181 * (x4 - x5) + 128) >> 8;
blk[0] = (x7 + x1) >> 8;
blk[1] = (x3 + x2) >> 8;
blk[2] = (x0 + x4) >> 8;
blk[3] = (x8 + x6) >> 8;
blk[4] = (x8 - x6) >> 8;
blk[5] = (x0 - x4) >> 8;
blk[6] = (x3 - x2) >> 8;
blk[7] = (x7 - x1) >> 8;
}
NJ_INLINE void njColIDCT(const int* blk, unsigned char *out, int stride) {
int x0, x1, x2, x3, x4, x5, x6, x7, x8;
if (!((x1 = blk[8*4] << 8)
| (x2 = blk[8*6])
| (x3 = blk[8*2])
| (x4 = blk[8*1])
| (x5 = blk[8*7])
| (x6 = blk[8*5])
| (x7 = blk[8*3])))
{
x1 = njClip(((blk[0] + 32) >> 6) + 128);
for (x0 = 8; x0; --x0) {
*out = (unsigned char) x1;
out += stride;
}
return;
}
x0 = (blk[0] << 8) + 8192;
x8 = W7 * (x4 + x5) + 4;
x4 = (x8 + (W1 - W7) * x4) >> 3;
x5 = (x8 - (W1 + W7) * x5) >> 3;
x8 = W3 * (x6 + x7) + 4;
x6 = (x8 - (W3 - W5) * x6) >> 3;
x7 = (x8 - (W3 + W5) * x7) >> 3;
x8 = x0 + x1;
x0 -= x1;
x1 = W6 * (x3 + x2) + 4;
x2 = (x1 - (W2 + W6) * x2) >> 3;
x3 = (x1 + (W2 - W6) * x3) >> 3;
x1 = x4 + x6;
x4 -= x6;
x6 = x5 + x7;
x5 -= x7;
x7 = x8 + x3;
x8 -= x3;
x3 = x0 + x2;
x0 -= x2;
x2 = (181 * (x4 + x5) + 128) >> 8; // Y，Cb和Cr的值都范围都是-128 ~ 127，并且在FDCT的时候有先减去128，所以现在要IDCT之后再加上128
x4 = (181 * (x4 - x5) + 128) >> 8;
*out = njClip(((x7 + x1) >> 14) + 128); out += stride;
*out = njClip(((x3 + x2) >> 14) + 128); out += stride;
*out = njClip(((x0 + x4) >> 14) + 128); out += stride;
*out = njClip(((x8 + x6) >> 14) + 128); out += stride;
*out = njClip(((x8 - x6) >> 14) + 128); out += stride;
*out = njClip(((x0 - x4) >> 14) + 128); out += stride;
*out = njClip(((x3 - x2) >> 14) + 128); out += stride;
*out = njClip(((x7 - x1) >> 14) + 128);
}
#define njThrow(e) do { nj.error = e; return; } while (0)
#define njCheckError() do { if (nj.error) return; } while (0)
static int njShowBits(int bits) { // 能放得下大于32位的值么？
unsigned char newbyte;
if (!bits) return 0;
while (nj.bufbits < bits) { // 也就是说要buf的位数小于已经buf的位数的时候，就直接读出来？
if (nj.size <= 0) {
nj.buf = (nj.buf << 8) | 0xFF;
nj.bufbits += 8;
continue;
}
newbyte = *nj.pos++; // 数据指针是按字节
nj.size--;
nj.bufbits += 8;
nj.buf = (nj.buf << 8) | newbyte; // 高位最终会被覆盖掉，比如我要buf一个64位的值怎么办？
if (newbyte == 0xFF) {
if (nj.size) {
unsigned char marker = *nj.pos++;
nj.size--;
switch (marker) {
case 0x00:
case 0xFF:
break;
case 0xD9: nj.size = 0; break;
default:
if ((marker & 0xF8) != 0xD0)
nj.error = NJ_SYNTAX_ERROR;
else {
nj.buf = (nj.buf << 8) | marker;
nj.bufbits += 8;
}
}
} else
nj.error = NJ_SYNTAX_ERROR;
}
}
return (nj.buf >> (nj.bufbits - bits)) & ((1 << bits) - 1);
}
NJ_INLINE void njSkipBits(int bits) {
if (nj.bufbits < bits)
(void) njShowBits(bits);
nj.bufbits -= bits;
}
NJ_INLINE int njGetBits(int bits) {
int res = njShowBits(bits);
njSkipBits(bits);
return res;
}
NJ_INLINE void njByteAlign(void) {
nj.bufbits &= 0xF8; // (1111 1000)8的倍数，不满8的部分丢弃
}
static void njSkip(int count) {
nj.pos += count; // 数据指针增加
nj.size -= count; // 总体数据大小减去count
nj.length -= count; // 当前marker长度减去count
if (nj.size < 0) nj.error = NJ_SYNTAX_ERROR;
}
NJ_INLINE unsigned short njDecode16(const unsigned char *pos) {
return (pos[0] << 8) | pos[1]; // 00000000 00001101
}
static void njDecodeLength(void) { // decode长度字段，这个方法调用一般都是已经进入到特定的marker之后
if (nj.size < 2) njThrow(NJ_SYNTAX_ERROR);
nj.length = njDecode16(nj.pos); // 该marker的长度(除去marker名字所占用的2个字节)
if (nj.length > nj.size) njThrow(NJ_SYNTAX_ERROR);
njSkip(2);
}
NJ_INLINE void njSkipMarker(void) {
njDecodeLength();
njSkip(nj.length);
}
NJ_INLINE void njDecodeSOF(void) { // 解析Start of Frame的时候就会把所需要的内存都分配好
int i, ssxmax = 0, ssymax = 0;
nj_component_t* c;
njDecodeLength(); // 解析长度并移动数据指针
if (nj.length < 9) njThrow(NJ_SYNTAX_ERROR);
if (nj.pos[0] != 8) njThrow(NJ_UNSUPPORTED); // 样本精度，一般都是8
nj.height = njDecode16(nj.pos + 1); // 图片高度/宽度
nj.width = njDecode16(nj.pos + 3);
nj.ncomp = nj.pos[5]; // 颜色分量数据，一般都是3
njSkip(6); // 之前共6个字节数据，所以移动数据指针6个字节
switch (nj.ncomp) { // 目前只支持1和3这两种
case 1:
case 3:
break;
default:
njThrow(NJ_UNSUPPORTED);
}
if (nj.length < (nj.ncomp * 3)) njThrow(NJ_SYNTAX_ERROR); // 数据量肯定是要大于颜色分量数 multiply 3，因为接着存颜色分量信息的每个结构占3个字节
// 颜色分量ID占用1个字节，水平/垂直因子占用1个字节(高4位水平，低4位垂直)，量化表占用1个字节
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) {
c->cid = nj.pos[0]; // 颜色分量ID
if (!(c->ssx = nj.pos[1] >> 4)) njThrow(NJ_SYNTAX_ERROR); // 高4位(水平因子)
if (c->ssx & (c->ssx - 1)) njThrow(NJ_UNSUPPORTED); // non-power of two
if (!(c->ssy = nj.pos[1] & 15)) njThrow(NJ_SYNTAX_ERROR); // (00001111)低4位(垂直因子)
if (c->ssy & (c->ssy - 1)) njThrow(NJ_UNSUPPORTED); // non-power of two
if ((c->qtsel = nj.pos[2]) & 0xFC) njThrow(NJ_SYNTAX_ERROR); // (11111101) 这里0xFC是用在这里干什么的？
njSkip(3); // 移动数据指针到下一个颜色分量
nj.qtused |= 1 << c->qtsel; // 这里是做什么用的？看不出来
if (c->ssx > ssxmax) ssxmax = c->ssx; // 记录最大水平因子
if (c->ssy > ssymax) ssymax = c->ssy; // 记录最大垂直因子
}
if (nj.ncomp == 1) { // 只有一种颜色分量的时候就简单啦
c = nj.comp;
c->ssx = c->ssy = ssxmax = ssymax = 1;
}
nj.mbsizex = ssxmax << 3; // MCU宽 是 水平采样因子最大值 multiply 8
nj.mbsizey = ssymax << 3; // MCU高 是 垂直采样因子最大值 multiply 8
nj.mbwidth = (nj.width + nj.mbsizex - 1) / nj.mbsizex; // 分子采用+ nj.mbsizex - 1就取到大于但是最接近(等于)宽度的值，
// 并且这个值是MCU宽度整数倍 // 这里是水平方向MCU的个数
nj.mbheight = (nj.height + nj.mbsizey - 1) / nj.mbsizey; // 这里是垂直方向MCU的个数
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) {
c->width = (nj.width * c->ssx + ssxmax - 1) / ssxmax; // 采样宽度？ 最大水平/垂直因子的值就是图片原来的值，否则就会根据因子做相应的减少
c->stride = (c->width + 7) & 0x7FFFFFF8; // (0111 1111 1111 1111 1111 1111 1111 1000) 做什么？以1234567结尾的都省略掉？
// 变成8的整数
// 补齐8位，注意前面有加7，所以总是不会比原来的少，比如原来是227，那么这里就会变成232
// 这是按照数据单元计算的，所以不对
c->height = (nj.height * c->ssy + ssymax - 1) / ssymax;
c->stride = nj.mbwidth * nj.mbsizex * c->ssx / ssxmax; // 再计算一遍stride有什么用？前面计算的是错误的，没有考虑MCU宽度
// 这里都已经是round过的了，所以直接计算
if (((c->width < 3) && (c->ssx != ssxmax)) || ((c->height < 3) && (c->ssy != ssymax))) njThrow(NJ_UNSUPPORTED);
if (!(c->pixels = njAllocMem(c->stride * (nj.mbheight * nj.mbsizey * c->ssy / ssymax)))) njThrow(NJ_OUT_OF_MEM); // 为分量分配内存
// 大小是所有MCU的
// 可能比图片实际
// 尺寸大
}
if (nj.ncomp == 3) { // 只有有3个颜色分量的时候才需要
nj.rgb = njAllocMem(nj.width * nj.height * nj.ncomp);
if (!nj.rgb) njThrow(NJ_OUT_OF_MEM);
}
njSkip(nj.length);
}
NJ_INLINE void njDecodeDHT(void) {
int codelen, currcnt, remain, spread, i, j;
nj_vlc_code_t *vlc;
static unsigned char counts[16]; // 码字
njDecodeLength();
while (nj.length >= 17) { // 码字的数量(16) + 类型和ID(1)
i = nj.pos[0]; // 类型和ID
if (i & 0xEC) njThrow(NJ_SYNTAX_ERROR); // (11101100)
if (i & 0x02) njThrow(NJ_UNSUPPORTED); // (00000010)
i = (i | (i >> 3)) & 3; // combined DC/AC + tableid value
// 直流0，直流1，交流0，交流1
for (codelen = 1; codelen <= 16; ++codelen) // 码字长度
counts[codelen - 1] = nj.pos[codelen]; // 读取码字 DHT 当中的16个字节 00 01 05 01 01 01 01 01 01 00 00 00 00 00 00 00
njSkip(17);
vlc = &nj.vlctab[i][0];
remain = spread = 65536;
for (codelen = 1; codelen <= 16; ++codelen) {
spread >>= 1; // 干什么？ // 65536 >> 16 = 1 每个category所包含的编码个数
currcnt = counts[codelen - 1];
if (!currcnt) continue; // 如果该位数没有码字
if (nj.length < currcnt) njThrow(NJ_SYNTAX_ERROR);
remain -= currcnt << (16 - codelen); // 干什么？ 计算当前size的码字占用多少VLC表的空间，得到剩下的空间
if (remain < 0) njThrow(NJ_SYNTAX_ERROR);
for (i = 0; i < currcnt; ++i) { // 码字个数，同样位数的码字可以有多个
register unsigned char code = nj.pos[i]; // 有多少个就，读多少个字节
for (j = spread; j; --j) { // 保存这么多个有什么作用？
vlc->bits = (unsigned char) codelen; // 码字位数
vlc->code = code; // 码字值(这个读取出来的到底是什么？00 01 02 03 04 05 06 07 08 09 0A 0B，是值，还是权重？)
++vlc;
}
}
njSkip(currcnt);
}
while (remain--) { // 16位都填充完成，剩下的就用0填(1位码字XX个，2位码字XX个，...)
// printf("i'm nothing vlc id %d\n", tblid);
vlc->bits = 0;
++vlc;
}
// for debug
// printf("Huffman vlc id %d\n", tblid);
// njPrintHT(tblid);
}
if (nj.length) njThrow(NJ_SYNTAX_ERROR);
}
NJ_INLINE void njDecodeDQT(void) {
int i;
unsigned char *t;
njDecodeLength();
while (nj.length >= 65) {
i = nj.pos[0]; // QT信息，高4位为QT精度，低4位为QT号
if (i & 0xFC) njThrow(NJ_SYNTAX_ERROR); // (1111 1110)这个用来检测QT号码是否正确的吗？目前精度好像都为0，所以这么写？
nj.qtavail |= 1 << i; // XXX 直接通过这里转换为数量？
t = &nj.qtab[i][0];
for (i = 0; i < 64; ++i)
t[i] = nj.pos[i + 1]; // 读取到QT数组当中，但应该还是按照文件流当中的排列
njSkip(65);
}
if (nj.length) njThrow(NJ_SYNTAX_ERROR);
}
NJ_INLINE void njDecodeDRI(void) {
njDecodeLength();
if (nj.length < 2) njThrow(NJ_SYNTAX_ERROR);
nj.rstinterval = njDecode16(nj.pos);
njSkip(nj.length);
}
static int njGetVLC(nj_vlc_code_t* vlc, unsigned char* code) { // Variable Length Coding
int value = njShowBits(16); // 为什么是2个字节？ 这又是什么？ 或许是这里的Huffman编码的码字永远是少于16位的
int bits = vlc[value].bits;
if (!bits) { nj.error = NJ_SYNTAX_ERROR; return 0; }
njSkipBits(bits);
value = vlc[value].code;
if (code) *code = (unsigned char) value;
bits = value & 15; // 这个value必须是0~15之间？
if (!bits) {
return 0;
}
value = njGetBits(bits); // 如果这里需要读取的值的位数超过之前njShowBits剩余的值，这里会重新读取
if (value < (1 << (bits - 1)))
value += ((-1) << bits) + 1;
return value;
}
NJ_INLINE void njDecodeBlock(nj_component_t* c, unsigned char* out) { // 8 x 8
unsigned char code = 0;
int value, coef = 0;
njFillMem(nj.block, 0, sizeof(nj.block));
int dcvlcval = njGetVLC(&nj.vlctab[c->dctabsel][0], NULL);
c->dcpred += dcvlcval;
nj.block[0] = (c->dcpred) * nj.qtab[c->qtsel][0]; // DC // 这里是反量化？
do {
value = njGetVLC(&nj.vlctab[c->actabsel][0], &code); // DC 2/3
if (!code) break; // EOB
if (!(code & 0x0F) && (code != 0xF0)) njThrow(NJ_SYNTAX_ERROR); // 这是什么字段？(难道是为了兼容这个过程中可以遇到0xF0这样的数据)
coef += (code >> 4) + 1; // coefficient 系数
if (coef > 63) njThrow(NJ_SYNTAX_ERROR);
nj.block[(int) njZZ[coef]] = value * nj.qtab[c->qtsel][coef]; // AC 这里是反量化？
} while (coef < 63);
for (coef = 0; coef < 64; coef += 8)
njRowIDCT(&nj.block[coef]); // 上面先Huffman解码/反量化，这里行(反DCT)
for (coef = 0; coef < 8; ++coef)
njColIDCT(&nj.block[coef], &out[coef], c->stride);
}
NJ_INLINE void njDecodeScan(void) {
// njPrintHT(0);
// njPrintHT(2);
// njPrintHT(1);
// njPrintHT(3);
int i, mbx, mby, sbx, sby;
int rstcount = nj.rstinterval, nextrst = 0;
nj_component_t* c;
njDecodeLength();
if (nj.length < (4 + 2 * nj.ncomp)) njThrow(NJ_SYNTAX_ERROR);
if (nj.pos[0] != nj.ncomp) njThrow(NJ_UNSUPPORTED);
njSkip(1); // 颜色分量数量
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) {
if (nj.pos[0] != c->cid) njThrow(NJ_SYNTAX_ERROR); // 颜色分量ID
if (nj.pos[1] & 0xEE) njThrow(NJ_SYNTAX_ERROR);
c->dctabsel = nj.pos[1] >> 4; // 高4位为直流表DC Table
c->actabsel = (nj.pos[1] & 1) | 2; // 低4位为交流表AC Table(这里有做特殊处理，所以AC的表名不会和DC相同)
njSkip(2);
}
if (nj.pos[0] || (nj.pos[1] != 63) || nj.pos[2]) njThrow(NJ_UNSUPPORTED);
njSkip(nj.length); // 忽略3个字节 通常为 00 3F 00
// 2 + 1 + 6 + 3为12字节，这个marker的长度刚好为12字节
// 接下来都是编码过的图像数据
for (mbx = mby = 0;;) {
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) // 每个分量都要decode
for (sby = 0; sby < c->ssy; ++sby) // 水平/垂直因子
for (sbx = 0; sbx < c->ssx; ++sbx) {
njDecodeBlock(c, &c->pixels[((mby * c->ssy + sby) * c->stride + mbx * c->ssx + sbx) << 3]); // 读取原始编码过
// 的图片数据到block中
// 并反量化，反离散余弦变换
njCheckError();
}
if (++mbx >= nj.mbwidth) { // 读完所有的MCU，到达最右就返回从下一行开始
mbx = 0;
if (++mby >= nj.mbheight) break; // 到达最底行的时候推出，decode结束
}
if (nj.rstinterval && !(--rstcount)) { // restart marker
njByteAlign();
i = njGetBits(16);
if (((i & 0xFFF8) != 0xFFD0) || ((i & 7) != nextrst)) njThrow(NJ_SYNTAX_ERROR);
nextrst = (nextrst + 1) & 7;
rstcount = nj.rstinterval;
for (i = 0; i < 3; ++i)
nj.comp[i].dcpred = 0;
}
}
nj.error = __NJ_FINISHED;
}
#if NJ_CHROMA_FILTER
#define CF4A (-9)
#define CF4B (111)
#define CF4C (29)
#define CF4D (-3)
#define CF3A (28)
#define CF3B (109)
#define CF3C (-9)
#define CF3X (104)
#define CF3Y (27)
#define CF3Z (-3)
#define CF2A (139)
#define CF2B (-11)
#define CF(x) njClip(((x) + 64) >> 7)
// 通常我们放大图片的时候就需要upsampling，缩小的时候就downsampling，通称为resampling
// 这里Cb/Cr分量的会少些，所以需要upsampling
NJ_INLINE void njUpsampleH(nj_component_t* c) {
const int xmax = c->width - 3;
unsigned char *out, *lin, *lout;
int x, y;
out = njAllocMem((c->width * c->height) << 1);
if (!out) njThrow(NJ_OUT_OF_MEM);
lin = c->pixels;
lout = out;
for (y = c->height; y; --y) {
lout[0] = CF(CF2A * lin[0] + CF2B * lin[1]);
lout[1] = CF(CF3X * lin[0] + CF3Y * lin[1] + CF3Z * lin[2]);
lout[2] = CF(CF3A * lin[0] + CF3B * lin[1] + CF3C * lin[2]);
for (x = 0; x < xmax; ++x) {
lout[(x << 1) + 3] = CF(CF4A * lin[x] + CF4B * lin[x + 1] + CF4C * lin[x + 2] + CF4D * lin[x + 3]);
lout[(x << 1) + 4] = CF(CF4D * lin[x] + CF4C * lin[x + 1] + CF4B * lin[x + 2] + CF4A * lin[x + 3]);
}
lin += c->stride;
lout += c->width << 1;
lout[-3] = CF(CF3A * lin[-1] + CF3B * lin[-2] + CF3C * lin[-3]);
lout[-2] = CF(CF3X * lin[-1] + CF3Y * lin[-2] + CF3Z * lin[-3]);
lout[-1] = CF(CF2A * lin[-1] + CF2B * lin[-2]);
}
c->width <<= 1;
c->stride = c->width;
njFreeMem(c->pixels);
c->pixels = out;
}
NJ_INLINE void njUpsampleV(nj_component_t* c) {
const int w = c->width, s1 = c->stride, s2 = s1 + s1;
unsigned char *out, *cin, *cout;
int x, y;
out = njAllocMem((c->width * c->height) << 1);
if (!out) njThrow(NJ_OUT_OF_MEM);
for (x = 0; x < w; ++x) {
cin = &c->pixels[x];
cout = &out[x];
*cout = CF(CF2A * cin[0] + CF2B * cin[s1]); cout += w;
*cout = CF(CF3X * cin[0] + CF3Y * cin[s1] + CF3Z * cin[s2]); cout += w;
*cout = CF(CF3A * cin[0] + CF3B * cin[s1] + CF3C * cin[s2]); cout += w;
cin += s1;
for (y = c->height - 3; y; --y) {
*cout = CF(CF4A * cin[-s1] + CF4B * cin[0] + CF4C * cin[s1] + CF4D * cin[s2]); cout += w;
*cout = CF(CF4D * cin[-s1] + CF4C * cin[0] + CF4B * cin[s1] + CF4A * cin[s2]); cout += w;
cin += s1;
}
cin += s1;
*cout = CF(CF3A * cin[0] + CF3B * cin[-s1] + CF3C * cin[-s2]); cout += w;
*cout = CF(CF3X * cin[0] + CF3Y * cin[-s1] + CF3Z * cin[-s2]); cout += w;
*cout = CF(CF2A * cin[0] + CF2B * cin[-s1]);
}
c->height <<= 1;
c->stride = c->width;
njFreeMem(c->pixels);
c->pixels = out;
}
#else
NJ_INLINE void njUpsample(nj_component_t* c) {
int x, y, xshift = 0, yshift = 0;
unsigned char *out, *lin, *lout;
while (c->width < nj.width) { c->width <<= 1; ++xshift; }
while (c->height < nj.height) { c->height <<= 1; ++yshift; }
out = njAllocMem(c->width * c->height); // 放大后的尺寸
if (!out) njThrow(NJ_OUT_OF_MEM);
lin = c->pixels;
lout = out;
for (y = 0; y < c->height; ++y) {
lin = &c->pixels[(y >> yshift) * c->stride];
for (x = 0; x < c->width; ++x)
lout[x] = lin[x >> xshift];
lout += c->width;
}
c->stride = c->width;
njFreeMem(c->pixels);
c->pixels = out;
}
#endif
NJ_INLINE void njConvert() {
int i;
nj_component_t* c;
for (i = 0, c = nj.comp; i < nj.ncomp; ++i, ++c) { // 如果需要的话就upsampling
#if NJ_CHROMA_FILTER
while ((c->width < nj.width) || (c->height < nj.height)) {
if (c->width < nj.width) njUpsampleH(c);
njCheckError();
if (c->height < nj.height) njUpsampleV(c);
njCheckError();
}
#else
if ((c->width < nj.width) || (c->height < nj.height))
njUpsample(c);
#endif
if ((c->width < nj.width) || (c->height < nj.height)) njThrow(NJ_INTERNAL_ERR);
}
if (nj.ncomp == 3) { // SEE njGetImage()
// convert to RGB
int x, yy;
unsigned char *prgb = nj.rgb;
const unsigned char *py = nj.comp[0].pixels;
const unsigned char *pcb = nj.comp[1].pixels;
const unsigned char *pcr = nj.comp[2].pixels;
// 多余的数据(编/解码是对齐用的)会被丢弃吗？
for (yy = nj.height; yy; --yy) { // 列
for (x = 0; x < nj.width; ++x) { // 行
register int y = py[x] << 8; // 这是为什么？ 色彩空间转换公式计算需要
register int cb = pcb[x] - 128; // YCbCr的Cb和Cr一般都是有符号数，但是在JPEG当中都是无符号数
register int cr = pcr[x] - 128;
*prgb++ = njClip((y + 359 * cr + 128) >> 8); // 色彩空间转换，YCbCr到RGB
*prgb++ = njClip((y - 88 * cb - 183 * cr + 128) >> 8);
*prgb++ = njClip((y + 454 * cb + 128) >> 8);
}
py += nj.comp[0].stride; // 移动YCbCr数据指针，每一行都是有stride的，所以当需要的数据都得到时，后面的就不管，直接丢弃，移动到下一行
pcb += nj.comp[1].stride;
pcr += nj.comp[2].stride;
}
} else if (nj.comp[0].width != nj.comp[0].stride) { // 如果宽度和stride都一样，什么都不用做
// grayscale -> only remove stride
unsigned char *pin = &nj.comp[0].pixels[nj.comp[0].stride];
unsigned char *pout = &nj.comp[0].pixels[nj.comp[0].width];
int y;
for (y = nj.comp[0].height - 1; y; --y) {
njCopyMem(pout, pin, nj.comp[0].width);
pin += nj.comp[0].stride;
pout += nj.comp[0].width;
}
nj.comp[0].stride = nj.comp[0].width;
}
}
void njInit(void) {
njFillMem(&nj, 0, sizeof(nj_context_t)); // 初始化nj_context_t
}
void njDone(void) {
int i;
for (i = 0; i < 3; ++i)
if (nj.comp[i].pixels) njFreeMem((void*) nj.comp[i].pixels);
if (nj.rgb) njFreeMem((void*) nj.rgb);
njInit();
}
nj_result_t njDecode(const void* jpeg, const int size) {
njDone();
nj.pos = (const unsigned char*) jpeg;
nj.size = size & 0x7FFFFFFF; // ？
if (nj.size < 2) return NJ_NO_JPEG;
if ((nj.pos[0] ^ 0xFF) | (nj.pos[1] ^ 0xD8)) return NJ_NO_JPEG; // 不以0xFFD8打头(为什么要用异或来判断？)
njSkip(2);
while (!nj.error) { // 有“错误”的时候离开
if ((nj.size < 2) || (nj.pos[0] != 0xFF)) return NJ_SYNTAX_ERROR; // 太小，或者不以0xFF打头
njSkip(2); // 移动到标签的后面(长度字段的前面)
switch (nj.pos[-1]) {
case 0xC0: njDecodeSOF(); break;
case 0xC4: njDecodeDHT(); break;
case 0xDB: njDecodeDQT(); break;
case 0xDD: njDecodeDRI(); break;
case 0xDA: njDecodeScan(); break;
case 0xFE: njSkipMarker(); break;
default:
if ((nj.pos[-1] & 0xF0) == 0xE0) // JPG0和APP0字段，目前都忽略
njSkipMarker();
else
return NJ_UNSUPPORTED;
}
}
if (nj.error != __NJ_FINISHED) return nj.error;
nj.error = NJ_OK;
njConvert();
return nj.error;
}
int njGetWidth(void) { return nj.width; }
int njGetHeight(void) { return nj.height; }
int njIsColor(void) { return (nj.ncomp != 1); }
unsigned char* njGetImage(void) { return (nj.ncomp == 1) ? nj.comp[0].pixels : nj.rgb; } // 一/三个分量
int njGetImageSize(void) { return nj.width * nj.height * nj.ncomp; }
#endif // _NJ_INCLUDE_HEADER_ONLY

10
src/kernel/userland/nanojpeg.h
View file

@ -1,10 +0,0 @@
// nanojpeg.h - Header for NanoJPEG decoder (freestanding kernel use)
#ifndef NANOJPEG_H
#define NANOJPEG_H
// Include naojpeg.c in header-only mode to get the type/function declarations
#define _NJ_INCLUDE_HEADER_ONLY
#include "nanojpeg.c"
#undef _NJ_INCLUDE_HEADER_ONLY
#endif // NANOJPEG_H

21
src/kernel/userland/settings.c
View file

@ -4,7 +4,7 @@
#include "libc/syscall.h" #include "libc/syscall.h"
#include "libc/libui.h" #include "libc/libui.h"
#include "libc/stdlib.h" #include "libc/stdlib.h"
#include "nanojpeg.h" #include "stb_image.h"
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
@ -113,13 +113,17 @@ static void generate_lumberjack_pattern(void) {
} }
} }
static void scale_rgb_to_argb(const unsigned char *rgb, int src_w, int src_h, uint32_t *dst, int dst_w, int dst_h) { static void scale_rgba_to_argb(const unsigned char *rgba, int src_w, int src_h, uint32_t *dst, int dst_w, int dst_h) {
for (int y = 0; y < dst_h; y++) { for (int y = 0; y < dst_h; y++) {
int src_y = y * src_h / dst_h; int src_y = y * src_h / dst_h;
for (int x = 0; x < dst_w; x++) { for (int x = 0; x < dst_w; x++) {
int src_x = x * src_w / dst_w; int src_x = x * src_w / dst_w;
int idx = (src_y * src_w + src_x) * 3; int idx = (src_y * src_w + src_x) * 4;
dst[y * dst_w + x] = 0xFF000000 | (rgb[idx] << 16) | (rgb[idx + 1] << 8) | rgb[idx + 2]; uint8_t r = rgba[idx];
uint8_t g = rgba[idx + 1];
uint8_t b = rgba[idx + 2];
uint8_t a = rgba[idx + 3];
dst[y * dst_w + x] = ((uint32_t)a << 24) | ((uint32_t)r << 16) | ((uint32_t)g << 8) | b;
} }
} }
} }
@ -161,12 +165,13 @@ static void load_wallpapers(void) {
unsigned char *buf = (unsigned char *)malloc(size); unsigned char *buf = (unsigned char *)malloc(size);
if (buf) { if (buf) {
sys_read(fd, buf, size); sys_read(fd, buf, size);
njInit(); int img_w, img_h, channels;
if (njDecode(buf, size) == NJ_OK) { unsigned char *img = stbi_load_from_memory(buf, size, &img_w, &img_h, &channels, 4);
scale_rgb_to_argb(njGetImage(), njGetWidth(), njGetHeight(), wp->thumb, WALLPAPER_THUMB_W, WALLPAPER_THUMB_H); if (img && img_w > 0 && img_h > 0) {
scale_rgba_to_argb(img, img_w, img_h, wp->thumb, WALLPAPER_THUMB_W, WALLPAPER_THUMB_H);
wp->valid = 1; wp->valid = 1;
stbi_image_free(img);
} }
njDone();
free(buf); // Release memory free(buf); // Release memory
} }
} }

5
src/kernel/userland/stb_image.c Normal file
View file

@ -0,0 +1,5 @@
// stb_image.c wrapper for Userland Mode
#include <stdlib.h>
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"

14
src/kernel/userland/stb_image.h
View file

@ -1,3 +1,17 @@
#ifndef BOREDOS_STBI_CONFIG
#define BOREDOS_STBI_CONFIG
#define STBI_NO_STDIO
#define STBI_NO_LINEAR
#define STBI_NO_HDR
#define STBI_NO_SIMD
#define STBI_NO_PSD
#define STBI_NO_PIC
#define STBI_NO_PNM
#define STBI_NO_THREAD_LOCALS
#define STBI_ASSERT(x) ((void)(x))
static inline int abs_stbi(int x) { return x < 0 ? -x : x; }
#define abs abs_stbi
#endif
/* stb_image - v2.30 - public domain image loader - http://nothings.org/stb /* stb_image - v2.30 - public domain image loader - http://nothings.org/stb
no warranty implied; use at your own risk no warranty implied; use at your own risk

225
src/kernel/userland/viewer.c
View file

@ -1,7 +1,7 @@
// Copyright (c) 2023-2026 Chris (boreddevnl) // Copyright (c) 2023-2026 Chris (boreddevnl)
// This software is released under the GNU General Public License v3.0. See LICENSE file for details. // This software is released under the GNU General Public License v3.0. See LICENSE file for details.
// This header needs to maintain in any file it is present in, as per the GPL license terms. // This header needs to maintain in any file it is present in, as per the GPL license terms.
#include "nanojpeg.h" #include "stb_image.h"
#include "libc/syscall.h" #include "libc/syscall.h"
#include "libc/libui.h" #include "libc/libui.h"
#include "libc/stdlib.h" #include "libc/stdlib.h"
@ -13,6 +13,12 @@
#define VIEWER_MAX_H 600 #define VIEWER_MAX_H 600
static uint32_t *viewer_pixels = NULL; static uint32_t *viewer_pixels = NULL;
static uint32_t **viewer_frames = NULL;
static int *viewer_delays = NULL;
static int viewer_frame_count = 0;
static int viewer_current_frame = 0;
static uint64_t viewer_next_frame_tick = 0;
static int viewer_img_w = 0; static int viewer_img_w = 0;
static int viewer_img_h = 0; static int viewer_img_h = 0;
static char viewer_title[64] = "Viewer"; static char viewer_title[64] = "Viewer";
@ -33,20 +39,43 @@ static int viewer_strlen(const char *s) {
return len; return len;
} }
static void viewer_scale_rgb_to_argb(const unsigned char *rgb, int src_w, int src_h, static void viewer_scale_rgba_to_argb(const unsigned char *rgba, int src_w, int src_h,
uint32_t *dst, int dst_w, int dst_h) { uint32_t *dst, int dst_w, int dst_h) {
for (int y = 0; y < dst_h; y++) { if (src_w == dst_w && src_h == dst_h) {
int src_y = y * src_h / dst_h; // Fast path: 1:1 copy
if (src_y >= src_h) src_y = src_h - 1; for (int i = 0; i < dst_w * dst_h; i++) {
for (int x = 0; x < dst_w; x++) { int idx = i * 4;
int src_x = x * src_w / dst_w; dst[i] = ((uint32_t)rgba[idx + 3] << 24) | ((uint32_t)rgba[idx] << 16) |
if (src_x >= src_w) src_x = src_w - 1; ((uint32_t)rgba[idx + 1] << 8) | rgba[idx + 2];
int idx = (src_y * src_w + src_x) * 3;
unsigned char r = rgb[idx];
unsigned char g = rgb[idx + 1];
unsigned char b = rgb[idx + 2];
dst[y * dst_w + x] = 0xFF000000 | ((uint32_t)r << 16) | ((uint32_t)g << 8) | b;
} }
return;
}
// Fixed-point 16.16
uint32_t step_x = (src_w << 16) / dst_w;
uint32_t step_y = (src_h << 16) / dst_h;
uint32_t curr_y = 0;
for (int y = 0; y < dst_h; y++) {
uint32_t src_y = curr_y >> 16;
if (src_y >= (uint32_t)src_h) src_y = src_h - 1;
uint32_t curr_x = 0;
uint32_t src_row_offset = src_y * src_w;
uint32_t dst_row_offset = y * dst_w;
for (int x = 0; x < dst_w; x++) {
uint32_t src_x = curr_x >> 16;
if (src_x >= (uint32_t)src_w) src_x = src_w - 1;
int idx = (src_row_offset + src_x) * 4;
dst[dst_row_offset + x] = ((uint32_t)rgba[idx + 3] << 24) |
((uint32_t)rgba[idx] << 16) |
((uint32_t)rgba[idx + 1] << 8) |
rgba[idx + 2];
curr_x += step_x;
}
curr_y += step_y;
} }
} }
@ -56,13 +85,15 @@ static void viewer_paint(ui_window_t win) {
int cw = win_w - 8; int cw = win_w - 8;
int ch = win_h - 28; int ch = win_h - 28;
ui_draw_rect(win, cx, cy, cw, ch, 0xFF1A1A1A);
if (!viewer_has_image) { if (!viewer_has_image) {
ui_draw_string(win, cx + 20, cy + ch / 2, "No image loaded", 0xFF888888); ui_draw_string(win, cx + 20, cy + ch / 2, "No image loaded", 0xFF888888);
return; return;
} }
uint32_t *pixels = viewer_pixels;
if (viewer_frames) pixels = viewer_frames[viewer_current_frame];
int disp_w = viewer_img_w; int disp_w = viewer_img_w;
int disp_h = viewer_img_h; int disp_h = viewer_img_h;
@ -76,62 +107,58 @@ static void viewer_paint(ui_window_t win) {
} }
int ox = cx + (cw - disp_w) / 2; int ox = cx + (cw - disp_w) / 2;
int oy = cy + (ch - disp_h - 30) / 2; int oy = cy + (ch - disp_h) / 2;
uint32_t *temp_buf = malloc(disp_w * disp_h * sizeof(uint32_t)); uint32_t *temp_buf = malloc(disp_w * disp_h * sizeof(uint32_t));
if (temp_buf) { if (temp_buf) {
for (int y = 0; y < disp_h; y++) { if (disp_w == viewer_img_w && disp_h == viewer_img_h) {
int src_y = y * viewer_img_h / disp_h; // Fast path: 1:1
if (src_y >= viewer_img_h) src_y = viewer_img_h - 1; for (int i = 0; i < disp_w * disp_h; i++) temp_buf[i] = pixels[i];
for (int x = 0; x < disp_w; x++) { } else {
int src_x = x * viewer_img_w / disp_w; // Fixed-point 16.16
if (src_x >= viewer_img_w) src_x = viewer_img_w - 1; uint32_t step_x = (viewer_img_w << 16) / disp_w;
temp_buf[y * disp_w + x] = viewer_pixels[src_y * viewer_img_w + src_x]; uint32_t step_y = (viewer_img_h << 16) / disp_h;
uint32_t curr_y = 0;
for (int y = 0; y < disp_h; y++) {
uint32_t src_y = curr_y >> 16;
if (src_y >= (uint32_t)viewer_img_h) src_y = viewer_img_h - 1;
uint32_t curr_x = 0;
uint32_t src_row_off = src_y * viewer_img_w;
uint32_t dst_row_off = y * disp_w;
for (int x = 0; x < disp_w; x++) {
uint32_t src_x = curr_x >> 16;
if (src_x >= (uint32_t)viewer_img_w) src_x = viewer_img_w - 1;
temp_buf[dst_row_off + x] = pixels[src_row_off + src_x];
curr_x += step_x;
}
curr_y += step_y;
} }
} }
ui_draw_image(win, ox, oy, disp_w, disp_h, temp_buf); ui_draw_image(win, ox, oy, disp_w, disp_h, temp_buf);
free(temp_buf); free(temp_buf);
} }
int btn_w = 160;
int btn_h = 22;
int btn_x = cx + (cw - btn_w) / 2;
int btn_y = (win_h - 20) - 30;
ui_draw_rounded_rect_filled(win, btn_x, btn_y, btn_w, btn_h, 6, 0xFF2D2D2D);
ui_draw_string(win, btn_x + 10, btn_y + 6, "Set as Wallpaper", 0xFFF0F0F0);
}
static void viewer_handle_click(ui_window_t win, int x, int y) {
if (!viewer_has_image) return;
int cx = 4;
int cw = win_w - 8;
int btn_w = 160;
int btn_x = cx + (cw - btn_w) / 2;
int btn_y = (win_h - 25) - 30; // Matches the hitboxes
if (x >= btn_x && x < btn_x + btn_w && y >= btn_y && y < btn_y + 22) {
// SYSTEM_CMD_SET_WALLPAPER_PATH is 31
sys_system(31, (uint64_t)viewer_file_path, 0, 0, 0);
}
} }
void viewer_open_file(const char *path) { void viewer_open_file(const char *path) {
int fd = sys_open(path, "r"); int fd = sys_open(path, "r");
if (fd < 0) return; if (fd < 0) return;
// We can't use stat yet, so read chunks until EOF uint32_t file_size = sys_size(fd);
// Alternatively, use a large buffer if sys_read handles large chunks. if (file_size == 0 || file_size > 32 * 1024 * 1024) { // 32MB limit
int alloc_size = 2 * 1024 * 1024; sys_close(fd);
unsigned char *buf = malloc(alloc_size); return;
}
unsigned char *buf = malloc(file_size);
if (!buf) { if (!buf) {
sys_close(fd); sys_close(fd);
return; return;
} }
int total_read = 0; int total_read = 0;
while (total_read < alloc_size) { while (total_read < (int)file_size) {
int chunk = sys_read(fd, (char*)buf + total_read, alloc_size - total_read); int chunk = sys_read(fd, (char*)buf + total_read, (int)file_size - total_read);
if (chunk <= 0) break; if (chunk <= 0) break;
total_read += chunk; total_read += chunk;
} }
@ -142,20 +169,35 @@ void viewer_open_file(const char *path) {
return; return;
} }
njInit(); // Free previous image if any
nj_result_t result = njDecode(buf, total_read); if (viewer_pixels) { free(viewer_pixels); viewer_pixels = NULL; }
if (result != NJ_OK) { if (viewer_frames) {
njDone(); for (int i = 0; i < viewer_frame_count; i++) {
free(buf); if (viewer_frames[i]) free(viewer_frames[i]);
return; }
free(viewer_frames); viewer_frames = NULL;
}
if (viewer_delays) { free(viewer_delays); viewer_delays = NULL; }
viewer_frame_count = 0;
viewer_current_frame = 0;
viewer_has_image = false;
int img_w, img_h, channels;
unsigned char *rgba = NULL;
int *delays = NULL;
int frame_count = 1;
// Check if it's a GIF - more robust check
bool is_gif = (total_read > 4 && buf[0] == 'G' && buf[1] == 'I' && buf[2] == 'F');
if (is_gif) {
rgba = stbi_load_gif_from_memory(buf, total_read, &delays, &img_w, &img_h, &frame_count, &channels, 4);
} else {
rgba = stbi_load_from_memory(buf, total_read, &img_w, &img_h, &channels, 4);
} }
int img_w = njGetWidth(); if (!rgba || img_w <= 0 || img_h <= 0) {
int img_h = njGetHeight(); if (rgba) stbi_image_free(rgba);
unsigned char *rgb = njGetImage();
if (!rgb || img_w <= 0 || img_h <= 0) {
njDone();
free(buf); free(buf);
return; return;
} }
@ -171,15 +213,41 @@ void viewer_open_file(const char *path) {
fit_h = VIEWER_MAX_H; fit_h = VIEWER_MAX_H;
} }
viewer_pixels = malloc(fit_w * fit_h * sizeof(uint32_t)); if (frame_count > 1 && delays) {
if (viewer_pixels) { viewer_frames = malloc(frame_count * sizeof(uint32_t *));
viewer_scale_rgb_to_argb(rgb, img_w, img_h, viewer_pixels, fit_w, fit_h); viewer_delays = malloc(frame_count * sizeof(int));
viewer_img_w = fit_w; if (viewer_frames && viewer_delays) {
viewer_img_h = fit_h; viewer_frame_count = frame_count;
viewer_has_image = true; for (int i = 0; i < frame_count; i++) {
viewer_frames[i] = malloc(fit_w * fit_h * sizeof(uint32_t));
if (viewer_frames[i]) {
viewer_scale_rgba_to_argb(rgba + (i * img_w * img_h * 4), img_w, img_h, viewer_frames[i], fit_w, fit_h);
viewer_delays[i] = delays[i];
} else {
// Memory exhausted, stop here
viewer_frame_count = i;
break;
}
}
viewer_img_w = fit_w;
viewer_img_h = fit_h;
viewer_has_image = (viewer_frame_count > 0);
if (viewer_has_image) {
viewer_next_frame_tick = sys_system(16, 0, 0, 0, 0) + (viewer_delays[0] * 60 / 1000);
}
}
free(delays);
} else {
viewer_pixels = malloc(fit_w * fit_h * sizeof(uint32_t));
if (viewer_pixels) {
viewer_scale_rgba_to_argb(rgba, img_w, img_h, viewer_pixels, fit_w, fit_h);
viewer_img_w = fit_w;
viewer_img_h = fit_h;
viewer_has_image = true;
}
} }
njDone(); stbi_image_free(rgba);
free(buf); free(buf);
viewer_strcpy(viewer_file_path, path); viewer_strcpy(viewer_file_path, path);
@ -204,7 +272,7 @@ void viewer_open_file(const char *path) {
win_w = fit_w + 16; win_w = fit_w + 16;
if (win_w < 200) win_w = 200; if (win_w < 200) win_w = 200;
win_h = fit_h + 64; win_h = fit_h + 34;
if (win_h < 100) win_h = 100; if (win_h < 100) win_h = 100;
} }
@ -223,10 +291,23 @@ int main(int argc, char **argv) {
viewer_paint(win); viewer_paint(win);
ui_mark_dirty(win, 0, 0, win_w, win_h - 20); ui_mark_dirty(win, 0, 0, win_w, win_h - 20);
} else if (ev.type == GUI_EVENT_CLICK) { } else if (ev.type == GUI_EVENT_CLICK) {
viewer_handle_click(win, ev.arg1, ev.arg2); // No actions currently
} else if (ev.type == GUI_EVENT_CLOSE) { } else if (ev.type == GUI_EVENT_CLOSE) {
sys_exit(0); sys_exit(0);
} }
} else {
if (viewer_has_image && viewer_frame_count > 1) {
uint64_t now = sys_system(16, 0, 0, 0, 0);
if (now >= viewer_next_frame_tick) {
viewer_current_frame = (viewer_current_frame + 1) % viewer_frame_count;
viewer_next_frame_tick = now + (viewer_delays[viewer_current_frame] * 60 / 1000);
if (viewer_next_frame_tick <= now) viewer_next_frame_tick = now + 1;
viewer_paint(win);
ui_mark_dirty(win, 0, 0, win_w, win_h - 20);
}
}
// Small sleep to avoid eating 100% CPU
for (volatile int i = 0; i < 10000; i++);
} }
} }
return 0; return 0;

56
src/kernel/wallpaper.c
View file

@ -1,5 +1,6 @@
#include "wallpaper.h" #include "wallpaper.h"
#include "nanojpeg.h" #define STBI_NO_STDIO
#include "userland/stb_image.h"
#include "graphics.h" #include "graphics.h"
#include "fat32.h" #include "fat32.h"
#include "memory_manager.h" #include "memory_manager.h"
@ -10,7 +11,7 @@
// Static buffer for the current wallpaper (max 1920x1080) // Static buffer for the current wallpaper (max 1920x1080)
#define MAX_WP_WIDTH 1920 #define MAX_WP_WIDTH 1920
#define MAX_WP_HEIGHT 1080 #define MAX_WP_HEIGHT 1080
static uint32_t wp_pixels[MAX_WP_WIDTH * MAX_WP_HEIGHT]; static uint32_t* wp_pixels = NULL;
static int wp_width = 0; static int wp_width = 0;
static int wp_height = 0; static int wp_height = 0;
@ -18,39 +19,33 @@ static int wp_height = 0;
static volatile const char *pending_wallpaper_path = NULL; static volatile const char *pending_wallpaper_path = NULL;
static char pending_path_buf[256]; static char pending_path_buf[256];
// Simple nearest-neighbor scale from decoded RGB to ARGB pixel buffer // Simple nearest-neighbor scale from decoded RGBA to ARGB pixel buffer
static void scale_rgb_to_argb(const unsigned char *rgb, int src_w, int src_h, static void scale_rgba_to_argb(const unsigned char *rgba, int src_w, int src_h,
uint32_t *dst, int dst_w, int dst_h) { uint32_t *dst, int dst_w, int dst_h) {
for (int y = 0; y < dst_h; y++) { for (int y = 0; y < dst_h; y++) {
int src_y = y * src_h / dst_h; int src_y = y * src_h / dst_h;
if (src_y >= src_h) src_y = src_h - 1; if (src_y >= src_h) src_y = src_h - 1;
for (int x = 0; x < dst_w; x++) { for (int x = 0; x < dst_w; x++) {
int src_x = x * src_w / dst_w; int src_x = x * src_w / dst_w;
if (src_x >= src_w) src_x = src_w - 1; if (src_x >= src_w) src_x = src_w - 1;
int idx = (src_y * src_w + src_x) * 3;
unsigned char r = rgb[idx]; size_t idx = ((size_t)src_y * (size_t)src_w + (size_t)src_x) * 4;
unsigned char g = rgb[idx + 1]; unsigned char r = rgba[idx];
unsigned char b = rgb[idx + 2]; unsigned char g = rgba[idx + 1];
dst[y * dst_w + x] = 0xFF000000 | ((uint32_t)r << 16) | ((uint32_t)g << 8) | b; unsigned char b = rgba[idx + 2];
unsigned char a = rgba[idx + 3];
dst[y * dst_w + x] = ((uint32_t)a << 24) | ((uint32_t)r << 16) | ((uint32_t)g << 8) | b;
} }
} }
} }
// Decode JPEG data from memory and set as wallpaper (MUST be called from non-interrupt context) // Decode JPEG data from memory and set as wallpaper (MUST be called from non-interrupt context)
static int decode_and_set_wallpaper(const unsigned char *jpg_data, unsigned int jpg_size) { static int decode_and_set_wallpaper(const unsigned char *jpg_data, unsigned int jpg_size) {
njInit(); int img_w, img_h, channels;
nj_result_t result = njDecode(jpg_data, (int)jpg_size); // We request 4 channels (RGBA) for better alignment and consistency with working userland code
if (result != NJ_OK) { unsigned char *rgba = stbi_load_from_memory(jpg_data, (int)jpg_size, &img_w, &img_h, &channels, 4);
njDone();
return 0;
}
int img_w = njGetWidth(); if (!rgba || img_w <= 0 || img_h <= 0) {
int img_h = njGetHeight();
unsigned char *rgb = njGetImage();
if (!rgb || img_w <= 0 || img_h <= 0) {
njDone();
return 0; return 0;
} }
@ -60,11 +55,19 @@ static int decode_and_set_wallpaper(const unsigned char *jpg_data, unsigned int
if (screen_w > MAX_WP_WIDTH) screen_w = MAX_WP_WIDTH; if (screen_w > MAX_WP_WIDTH) screen_w = MAX_WP_WIDTH;
if (screen_h > MAX_WP_HEIGHT) screen_h = MAX_WP_HEIGHT; if (screen_h > MAX_WP_HEIGHT) screen_h = MAX_WP_HEIGHT;
scale_rgb_to_argb(rgb, img_w, img_h, wp_pixels, screen_w, screen_h); if (!wp_pixels) {
wp_pixels = (uint32_t*)kmalloc(MAX_WP_WIDTH * MAX_WP_HEIGHT * sizeof(uint32_t));
if (!wp_pixels) {
stbi_image_free(rgba);
return 0;
}
}
scale_rgba_to_argb(rgba, img_w, img_h, wp_pixels, screen_w, screen_h);
wp_width = screen_w; wp_width = screen_w;
wp_height = screen_h; wp_height = screen_h;
njDone(); stbi_image_free(rgba);
graphics_set_bg_image(wp_pixels, wp_width, wp_height); graphics_set_bg_image(wp_pixels, wp_width, wp_height);
return 1; return 1;
@ -113,8 +116,11 @@ void wallpaper_process_pending(void) {
if (fh) { if (fh) {
uint32_t file_size = fh->size; uint32_t file_size = fh->size;
if (file_size > 0 && file_size <= 4 * 1024 * 1024) { if (file_size > 0 && file_size <= 4 * 1024 * 1024) {
unsigned char *buf = (unsigned char*)kmalloc(file_size); // Add padding to avoid stb_image reading past the end and potential corruption
size_t padded_size = file_size + 128;
unsigned char *buf = (unsigned char*)kmalloc(padded_size);
if (buf) { if (buf) {
mem_memset(buf, 0, padded_size);
int total_read = 0; int total_read = 0;
while (total_read < (int)file_size) { while (total_read < (int)file_size) {
int chunk = fat32_read(fh, buf + total_read, (int)file_size - total_read); int chunk = fat32_read(fh, buf + total_read, (int)file_size - total_read);

51
src/kernel/wm.c
View file

@ -13,10 +13,21 @@
#include <stddef.h> #include <stddef.h>
#include "wallpaper.h" #include "wallpaper.h"
#include "fat32.h" #include "fat32.h"
#include "nanojpeg.h" #define STBI_NO_STDIO
#include "userland/stb_image.h"
#include "memory_manager.h" #include "memory_manager.h"
#include "disk.h" #include "disk.h"
// Hello developer,
// i advise you to just not read this code and live on with your life.
// It's not worth it.
// TRUST ME.
// If you do decide to hate yourself for some dumb reason,
// add a few hours to the counter of despair:
// hours wasted: 57
// send help
extern void serial_write(const char *str); extern void serial_write(const char *str);
static bool str_eq(const char *s1, const char *s2) { static bool str_eq(const char *s1, const char *s2) {
@ -124,6 +135,15 @@ static bool str_ends_with(const char *str, const char *suffix) {
return true; return true;
} }
static bool is_image_file(const char *filename) {
if (!filename) return false;
return str_ends_with(filename, ".jpg") || str_ends_with(filename, ".JPG") ||
str_ends_with(filename, ".png") || str_ends_with(filename, ".PNG") ||
str_ends_with(filename, ".gif") || str_ends_with(filename, ".GIF") ||
str_ends_with(filename, ".bmp") || str_ends_with(filename, ".BMP") ||
str_ends_with(filename, ".tga") || str_ends_with(filename, ".TGA");
}
// Helper to check if string starts with prefix // Helper to check if string starts with prefix
static bool str_starts_with(const char *str, const char *prefix) { static bool str_starts_with(const char *str, const char *prefix) {
while(*prefix) { while(*prefix) {
@ -595,20 +615,17 @@ static uint32_t* thumb_cache_decode(const char *path) {
if (total <= 0) { kfree(buf); return NULL; } if (total <= 0) { kfree(buf); return NULL; }
// Decode JPEG // Decode image
njInit(); int img_w, img_h, channels;
if (njDecode(buf, total) != NJ_OK) { unsigned char *img = stbi_load_from_memory(buf, total, &img_w, &img_h, &channels, 4);
serial_write("[WM] njDecode failed for deferred thumb\n"); if (!img || img_w <= 0 || img_h <= 0) {
njDone(); serial_write("[WM] stbi_load_from_memory failed for deferred thumb\n");
if (img) stbi_image_free(img);
kfree(buf); kfree(buf);
return NULL; return NULL;
} }
serial_write("[WM] njDecode OK for deferred thumb\n"); serial_write("[WM] stbi_load_from_memory OK for deferred thumb\n");
int img_w = njGetWidth();
int img_h = njGetHeight();
unsigned char *img = njGetImage();
// Store in cache — downscale to 48x48 // Store in cache — downscale to 48x48
int slot = thumb_cache_next; int slot = thumb_cache_next;
@ -626,16 +643,16 @@ static uint32_t* thumb_cache_decode(const char *path) {
int sy = ty * img_h / 48; int sy = ty * img_h / 48;
if (sx >= img_w) sx = img_w - 1; if (sx >= img_w) sx = img_w - 1;
if (sy >= img_h) sy = img_h - 1; if (sy >= img_h) sy = img_h - 1;
int idx = (sy * img_w + sx) * 3; int idx = (sy * img_w + sx) * 4;
uint32_t r = img[idx], g = img[idx+1], b = img[idx+2]; uint32_t r = img[idx], g = img[idx+1], b = img[idx+2], a = img[idx+3];
thumb_cache[slot].pixels[ty * 48 + tx] = 0xFF000000 | (r << 16) | (g << 8) | b; thumb_cache[slot].pixels[ty * 48 + tx] = (a << 24) | (r << 16) | (g << 8) | b;
} }
} }
thumb_cache[slot].valid = true; thumb_cache[slot].valid = true;
thumb_cache[slot].failed = false; thumb_cache[slot].failed = false;
njDone(); stbi_image_free(img);
kfree(buf); kfree(buf);
return thumb_cache[slot].pixels; return thumb_cache[slot].pixels;
@ -1226,7 +1243,7 @@ void wm_paint(void) {
} else { } else {
if (str_ends_with(icon->name, ".elf")) draw_elf_icon(icon->x, icon->y, icon->name); if (str_ends_with(icon->name, ".elf")) draw_elf_icon(icon->x, icon->y, icon->name);
else if (str_ends_with(icon->name, ".pnt")) draw_paint_icon(icon->x, icon->y, icon->name); else if (str_ends_with(icon->name, ".pnt")) draw_paint_icon(icon->x, icon->y, icon->name);
else if (str_ends_with(icon->name, ".jpg") || str_ends_with(icon->name, ".JPG")) { else if (is_image_file(icon->name)) {
char full_path[128] = "/Desktop/"; char full_path[128] = "/Desktop/";
int p=9; int n=0; while(icon->name[n] && p < 127) full_path[p++] = icon->name[n++]; full_path[p]=0; int p=9; int n=0; while(icon->name[n] && p < 127) full_path[p++] = icon->name[n++]; full_path[p]=0;
draw_image_icon(icon->x, icon->y, full_path); draw_image_icon(icon->x, icon->y, full_path);
@ -2100,7 +2117,7 @@ void wm_handle_right_click(int x, int y) {
process_create_elf("/bin/paint.elf", path); process_create_elf("/bin/paint.elf", path);
} else if (str_ends_with(icon->name, ".md")) { } else if (str_ends_with(icon->name, ".md")) {
process_create_elf("/bin/markdown.elf", path); process_create_elf("/bin/markdown.elf", path);
} else if (str_ends_with(icon->name, ".jpg") || str_ends_with(icon->name, ".JPG")) { } else if (is_image_file(icon->name)) {
process_create_elf("/bin/viewer.elf", path); process_create_elf("/bin/viewer.elf", path);
} else { } else {
process_create_elf("/bin/txtedit.elf", path); process_create_elf("/bin/txtedit.elf", path);

0
test.gif Normal file
View file