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boredos_mirror/src/wm/graphics.c
mellurboo fd20a5df41 Window Manager Graphics Optimisations
2026-05-14 14:28:27 +01:00

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// 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 <stddef.h>
#include "graphics.h"
#include "font.h"
#include "io.h"
#include "font_manager.h"
#include "../mem/memory_manager.h"
#include "sys/spinlock.h"
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
static struct limine_framebuffer *g_fb = NULL;
static uint32_t g_bg_color = 0xFF696969;
extern void serial_write(const char *str);
extern uint32_t blend_src_over_dst(uint32_t dst, uint32_t src);
static int g_color_mode = 0;
#define PATTERN_SIZE 128
static uint32_t g_bg_pattern[PATTERN_SIZE * PATTERN_SIZE];
static bool g_use_pattern = false;
static uint32_t *g_bg_image = NULL;
static int g_bg_image_w = 0;
static int g_bg_image_h = 0;
static bool g_use_image = false;
static uint32_t *g_logo_pixels = NULL;
static int g_logo_w = 0;
static int g_logo_h = 0;
static DirtyRect g_dirty = {0, 0, 0, 0, false};
static spinlock_t graphics_lock = SPINLOCK_INIT;
#define MAX_FB_WIDTH 2048
#define MAX_FB_HEIGHT 2048
static uint32_t g_back_buffer[MAX_FB_WIDTH * MAX_FB_HEIGHT] __attribute__((aligned(4096)));
#define MAX_RENDER_CPUS 32
#define CLIP_STACK_DEPTH 8
static int g_clip_stack_x[MAX_RENDER_CPUS][CLIP_STACK_DEPTH];
static int g_clip_stack_y[MAX_RENDER_CPUS][CLIP_STACK_DEPTH];
static int g_clip_stack_w[MAX_RENDER_CPUS][CLIP_STACK_DEPTH];
static int g_clip_stack_h[MAX_RENDER_CPUS][CLIP_STACK_DEPTH];
static int g_clip_stack_ptr[MAX_RENDER_CPUS] = {0};
static bool g_clip_enabled[MAX_RENDER_CPUS] = {false};
extern uint32_t smp_this_cpu_id(void);
static uint32_t *g_render_target[MAX_RENDER_CPUS] = {0};
static int g_rt_width[MAX_RENDER_CPUS] = {0};
static int g_rt_height[MAX_RENDER_CPUS] = {0};
static ttf_font_t *g_current_ttf = NULL;
void graphics_init(struct limine_framebuffer *fb) {
g_fb = fb;
g_dirty.active = false;
// Initialize back buffer to black
for (int i = 0; i < MAX_FB_WIDTH * MAX_FB_HEIGHT; i++) {
g_back_buffer[i] = 0;
}
}
void graphics_init_fonts(void) {
font_manager_init();
g_current_ttf = font_manager_load("/Library/Fonts/firamono.ttf", 15.0f);
if (!g_current_ttf) {
serial_write("[FONT] Falling back to bitmap font\n");
}
font_manager_set_fallback_font(font_manager_load("/Library/Fonts/Emoji/NotoEmoji-VariableFont_wght.ttf", 15.0f));
}
void graphics_update_resolution(int width, int height, int bpp, void* fb_addr, int color_mode) {
if (!g_fb) return;
uint64_t rflags;
asm volatile("pushfq; pop %0; cli" : "=r"(rflags));
g_fb->width = width;
g_fb->height = height;
g_fb->bpp = bpp;
g_fb->pitch = width * (bpp / 8);
g_fb->address = fb_addr;
g_color_mode = color_mode;
// Clear back buffer
for (int i = 0; i < MAX_FB_WIDTH * MAX_FB_HEIGHT; i++) {
g_back_buffer[i] = 0;
}
// Clear dirty rect
g_dirty.active = false;
asm volatile("push %0; popfq" : : "r"(rflags));
}
void graphics_set_font(const char *path) {
ttf_font_t *new_font = font_manager_load(path, 15.0f);
if (new_font) {
// TODO: free old font data if needed
g_current_ttf = new_font;
serial_write("[FONT] Switched to: ");
serial_write(path);
serial_write("\n");
}
}
int get_screen_width(void) {
return g_fb ? g_fb->width : 0;
}
int get_screen_height(void) {
return g_fb ? g_fb->height : 0;
}
uint64_t graphics_get_fb_addr(void) {
return g_fb ? (uint64_t)g_fb->address : 0;
}
int graphics_get_fb_bpp(void) {
return g_fb ? g_fb->bpp : 0;
}
// faltten the structure, cache the edges, calculate the right and bottom edges
// calculate a new bounding box with some of my clever branchless math
// and perform exactly 1 Write to memory
static void merge_dirty_rect(int x, int y, int w, int h) {
if (!g_dirty.active) {
g_dirty.x = x;
g_dirty.y = y;
g_dirty.w = w;
g_dirty.h = h;
g_dirty.active = true;
return;
}
int gx = g_dirty.x;
int gy = g_dirty.y;
int gx2 = gx + g_dirty.w;
int gy2 = gy + g_dirty.h;
int nx2 = x + w;
int ny2 = y + h;
int new_x = MIN(gx, x);
int new_y = MIN(gy, y);
int new_x2 = MAX(gx2, nx2);
int new_y2 = MAX(gy2, ny2);
g_dirty.x = new_x;
g_dirty.y = new_y;
g_dirty.w = new_x2 - new_x;
g_dirty.h = new_y2 - new_y;
}
void graphics_mark_dirty(int x, int y, int w, int h) {
if (w <= 0 || h <= 0) {
return;
}
int x2 = x + w;
int y2 = y + h;
// Cache screen boundaries because then we can avoid multiple calls
int screen_w = get_screen_width();
int screen_h = get_screen_height();
int cx1 = MAX(0, x);
int cy1 = MAX(0, y);
int cx2 = MIN(screen_w, x2);
int cy2 = MIN(screen_h, y2);
int cw = cx2 - cx1;
int ch = cy2 - cy1;
if (cw <= 0 || ch <= 0) {
return;
}
uint64_t flags = spinlock_acquire_irqsave(&graphics_lock);
merge_dirty_rect(cx1, cy1, cw, ch);
spinlock_release_irqrestore(&graphics_lock, flags);
}
void graphics_mark_screen_dirty(void) {
uint64_t flags = spinlock_acquire_irqsave(&graphics_lock);
g_dirty.x = 0;
g_dirty.y = 0;
g_dirty.w = get_screen_width();
g_dirty.h = get_screen_height();
g_dirty.active = true;
spinlock_release_irqrestore(&graphics_lock, flags);
}
DirtyRect graphics_get_dirty_rect(void) {
return g_dirty;
}
void graphics_clear_dirty(void) {
uint64_t flags = spinlock_acquire_irqsave(&graphics_lock);
g_dirty.active = false;
spinlock_release_irqrestore(&graphics_lock, flags);
}
void graphics_clear_dirty_no_lock(void) {
g_dirty.active = false;
}
void graphics_set_render_target(uint32_t *buffer, int w, int h) {
uint32_t cpu = smp_this_cpu_id();
if (cpu < MAX_RENDER_CPUS) {
g_render_target[cpu] = buffer;
g_rt_width[cpu] = w;
g_rt_height[cpu] = h;
}
}
void put_pixel(int x, int y, uint32_t color) {
uint32_t cpu = smp_this_cpu_id();
if (cpu < MAX_RENDER_CPUS && g_render_target[cpu]) {
if (x >= 0 && x < g_rt_width[cpu] && y >= 0 && y < g_rt_height[cpu]) {
g_render_target[cpu][y * g_rt_width[cpu] + x] = color;
}
return;
}
if (!g_fb) return;
if (x < 0 || x >= (int)g_fb->width || y < 0 || y >= (int)g_fb->height) return;
if (g_clip_enabled[cpu]) {
int ptr = g_clip_stack_ptr[cpu];
if (x < g_clip_stack_x[cpu][ptr] || x >= g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr] ||
y < g_clip_stack_y[cpu][ptr] || y >= g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr]) {
return;
}
}
uint32_t pixel_offset = y * g_fb->width + x;
g_back_buffer[pixel_offset] = color;
}
uint32_t graphics_get_pixel(int x, int y) {
uint32_t cpu = smp_this_cpu_id();
if (cpu < MAX_RENDER_CPUS && g_render_target[cpu]) {
if (x >= 0 && x < g_rt_width[cpu] && y >= 0 && y < g_rt_height[cpu]) {
return g_render_target[cpu][y * g_rt_width[cpu] + x];
}
return 0;
}
if (!g_fb) return 0;
if (x < 0 || x >= (int)g_fb->width || y < 0 || y >= (int)g_fb->height) return 0;
return g_back_buffer[y * g_fb->width + x];
}
void draw_rect(int x, int y, int w, int h, uint32_t color) {
int x1 = x, y1 = y, x2 = x + w, y2 = y + h;
uint32_t cpu = smp_this_cpu_id();
if (cpu < MAX_RENDER_CPUS && g_render_target[cpu]) {
if (x1 < 0) x1 = 0;
if (y1 < 0) y1 = 0;
if (x2 > g_rt_width[cpu]) x2 = g_rt_width[cpu];
if (y2 > g_rt_height[cpu]) y2 = g_rt_height[cpu];
if (x1 >= x2 || y1 >= y2) return;
for (int i = y1; i < y2; i++) {
uint32_t *row = &g_render_target[cpu][i * g_rt_width[cpu] + x1];
int len = x2 - x1;
for (int j = 0; j < len; j++) {
row[j] = color;
}
}
return;
}
if (!g_fb) return;
if (g_clip_enabled[cpu]) {
int ptr = g_clip_stack_ptr[cpu];
if (x1 < g_clip_stack_x[cpu][ptr]) x1 = g_clip_stack_x[cpu][ptr];
if (y1 < g_clip_stack_y[cpu][ptr]) y1 = g_clip_stack_y[cpu][ptr];
if (x2 > g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr]) x2 = g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr];
if (y2 > g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr]) y2 = g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr];
}
if (x1 < 0) x1 = 0;
if (y1 < 0) y1 = 0;
if (x2 > (int)g_fb->width) x2 = g_fb->width;
if (y2 > (int)g_fb->height) y2 = g_fb->height;
if (x1 >= x2 || y1 >= y2) return;
for (int i = y1; i < y2; i++) {
uint32_t *row = &g_back_buffer[i * g_fb->width + x1];
int len = x2 - x1;
for (int j = 0; j < len; j++) {
row[j] = color;
}
}
}
// Simple integer-based square root approximation
static int isqrt(int n) {
if (n < 0) return 0;
if (n == 0) return 0;
int x = n;
int y = (x + 1) / 2;
while (y < x) {
x = y;
y = (x + n / x) / 2;
}
return x;
}
// Draw rounded rectangle outline
void draw_rounded_rect(int x, int y, int w, int h, int radius, uint32_t color) {
if (radius > w / 2) radius = w / 2;
if (radius > h / 2) radius = h / 2;
if (radius < 1) {
// Draw a simple rect outline if no radius
draw_rect(x, y, w, 1, color);
draw_rect(x, y + h - 1, w, 1, color);
draw_rect(x, y + 1, 1, h - 2, color);
draw_rect(x + w - 1, y + 1, 1, h - 2, color);
return;
}
// Draw top and bottom straight edges
draw_rect(x + radius, y, w - 2*radius, 1, color);
draw_rect(x + radius, y + h - 1, w - 2*radius, 1, color);
// Draw left and right straight edges
draw_rect(x, y + radius, 1, h - 2*radius, color);
draw_rect(x + w - 1, y + radius, 1, h - 2*radius, color);
// Draw four corner arcs
for (int dy = 0; dy < radius; dy++) {
int y_dist = radius - 1 - dy;
int dx = isqrt(radius*radius - y_dist*y_dist);
int next_dx = (dy < radius - 1) ? isqrt(radius*radius - (y_dist - 1)*(y_dist - 1)) : radius;
for (int i = dx; i < next_dx && i <= radius; i++) {
// Top-left
put_pixel(x + radius - 1 - i, y + dy, color);
// Top-right
put_pixel(x + w - radius + i, y + dy, color);
// Bottom-left
put_pixel(x + radius - 1 - i, y + h - 1 - dy, color);
// Bottom-right
put_pixel(x + w - radius + i, y + h - 1 - dy, color);
}
}
}
// Draw filled rounded rectangle
void draw_rounded_rect_filled(int x, int y, int w, int h, int radius, uint32_t color) {
if (radius > w / 2) radius = w / 2;
if (radius > h / 2) radius = h / 2;
if (radius < 1) {
draw_rect(x, y, w, h, color);
return;
}
// Draw main rectangle body
draw_rect(x, y + radius, w, h - 2*radius, color);
// Draw rounded top and bottom caps
for (int dy = 0; dy < radius; dy++) {
int y_dist = radius - 1 - dy;
int dx = isqrt(radius*radius - y_dist*y_dist);
draw_rect(x + radius - dx, y + dy, w - 2*radius + 2*dx, 1, color);
draw_rect(x + radius - dx, y + h - 1 - dy, w - 2*radius + 2*dx, 1, color);
}
}
static uint32_t blend_color_alpha(uint32_t bottom, uint32_t top, int alpha) {
if (alpha <= 0) return bottom;
if (alpha >= 255) return top;
int rb = (bottom >> 16) & 0xFF;
int gb = (bottom >> 8) & 0xFF;
int bb = bottom & 0xFF;
int rt = (top >> 16) & 0xFF;
int gt = (top >> 8) & 0xFF;
int bt = top & 0xFF;
int rr = rb + (((rt - rb) * alpha) >> 8);
int gg = gb + (((gt - gb) * alpha) >> 8);
int bb_new = bb + (((bt - bb) * alpha) >> 8);
return (rr << 16) | (gg << 8) | bb_new;
}
void draw_rounded_rect_blurred(int x, int y, int w, int h, int radius, uint32_t tint_color, int blur_radius, int alpha) {
if (!g_fb) return;
int sw = get_screen_width();
int sh = get_screen_height();
if (x < 0) { w += x; x = 0; }
if (y < 0) { h += y; y = 0; }
if (x + w > sw) w = sw - x;
if (y + h > sh) h = sh - y;
if (w <= 0 || h <= 0) return;
if (radius > w / 2) radius = w / 2;
if (radius > h / 2) radius = h / 2;
if (radius < 1) radius = 1;
uint32_t *tmp_buf = (uint32_t *)kmalloc(w * h * sizeof(uint32_t));
if (!tmp_buf) {
draw_rounded_rect_filled(x, y, w, h, radius, tint_color);
return;
}
for (int r = 0; r < h; r++) {
int g_y = y + r;
if (g_y < 0 || g_y >= sh) continue;
for (int c = 0; c < w; c++) {
int g_x = x + c;
if (g_x < 0 || g_x >= sw) continue;
int r_sum = 0, g_sum = 0, b_sum = 0, count = 0;
int start_kx = g_x - blur_radius;
int end_kx = g_x + blur_radius;
if (start_kx < 0) start_kx = 0;
if (end_kx >= sw) end_kx = sw - 1;
for (int kx = start_kx; kx <= end_kx; kx++) {
uint32_t pixel = g_back_buffer[g_y * sw + kx];
r_sum += (pixel >> 16) & 0xFF;
g_sum += (pixel >> 8) & 0xFF;
b_sum += pixel & 0xFF;
count++;
}
if(count == 0) count = 1;
uint32_t out_pixel = ((r_sum / count) << 16) | ((g_sum / count) << 8) | (b_sum / count);
tmp_buf[r * w + c] = out_pixel;
}
}
for (int r = 0; r < h; r++) {
int g_y = y + r;
if (g_y < 0 || g_y >= sh) continue;
uint32_t cpu = smp_this_cpu_id();
if (g_clip_enabled[cpu]) {
int ptr = g_clip_stack_ptr[cpu];
if (g_y < g_clip_stack_y[cpu][ptr] || g_y >= g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr]) continue;
}
for (int c = 0; c < w; c++) {
int g_x = x + c;
if (g_x < 0 || g_x >= sw) continue;
if (g_clip_enabled[cpu]) {
int ptr = g_clip_stack_ptr[cpu];
if (g_x < g_clip_stack_x[cpu][ptr] || g_x >= g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr]) continue;
}
bool in_corner = false;
int dx = 0, dy = 0;
if (c < radius && r < radius) {
dx = radius - c - 1; dy = radius - r - 1;
in_corner = true;
} else if (c >= w - radius && r < radius) {
dx = c - (w - radius); dy = radius - r - 1;
in_corner = true;
} else if (c < radius && r >= h - radius) {
dx = radius - c - 1; dy = r - (h - radius);
in_corner = true;
} else if (c >= w - radius && r >= h - radius) {
dx = c - (w - radius); dy = r - (h - radius);
in_corner = true;
}
if (in_corner) {
if (dx*dx + dy*dy >= radius*radius) {
continue;
}
}
int r_sum = 0, g_sum = 0, b_sum = 0, count = 0;
int start_kr = r - blur_radius;
int end_kr = r + blur_radius;
if (start_kr < 0) start_kr = 0;
if (end_kr >= h) end_kr = h - 1;
for (int kr = start_kr; kr <= end_kr; kr++) {
uint32_t pixel = tmp_buf[kr * w + c];
r_sum += (pixel >> 16) & 0xFF;
g_sum += (pixel >> 8) & 0xFF;
b_sum += pixel & 0xFF;
count++;
}
if(count == 0) count = 1;
uint32_t blurred_pixel = ((r_sum / count) << 16) | ((g_sum / count) << 8) | (b_sum / count);
uint32_t final_pixel = blend_color_alpha(blurred_pixel, tint_color, alpha);
g_back_buffer[g_y * sw + g_x] = final_pixel;
}
}
kfree(tmp_buf);
}
void draw_char(int x, int y, char c, uint32_t color) {
if (g_current_ttf) {
font_manager_render_char(g_current_ttf, x, y, c, color, put_pixel);
return;
}
unsigned char uc = (unsigned char)c;
if (uc > 127) return;
uint32_t cpu = smp_this_cpu_id();
bool has_rt = (cpu < MAX_RENDER_CPUS && g_render_target[cpu]);
if (g_clip_enabled[cpu] && !has_rt) {
int ptr = g_clip_stack_ptr[cpu];
if (x + 8 <= g_clip_stack_x[cpu][ptr] || x >= g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr] ||
y + 8 <= g_clip_stack_y[cpu][ptr] || y >= g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr]) {
return;
}
}
const uint8_t *glyph = font8x8_basic[uc];
for (int row = 0; row < 8; row++) {
for (int col = 0; col < 8; col++) {
if ((glyph[row] >> (7 - col)) & 1) {
put_pixel(x + col, y + row, color);
}
}
}
}
void draw_char_bitmap(int x, int y, char c, uint32_t color) {
unsigned char uc = (unsigned char)c;
if (uc > 127) return;
uint32_t cpu = smp_this_cpu_id();
bool has_rt = (cpu < MAX_RENDER_CPUS && g_render_target[cpu]);
if (g_clip_enabled[cpu] && !has_rt) {
int ptr = g_clip_stack_ptr[cpu];
if (x + 8 <= g_clip_stack_x[cpu][ptr] || x >= g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr] ||
y + 8 <= g_clip_stack_y[cpu][ptr] || y >= g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr]) {
return;
}
}
const uint8_t *glyph = font8x8_basic[uc];
for (int row = 0; row < 8; row++) {
for (int col = 0; col < 8; col++) {
if ((glyph[row] >> (7 - col)) & 1) {
put_pixel(x + col, y + row, color);
}
}
}
}
ttf_font_t *graphics_get_current_ttf(void) {
return g_current_ttf;
}
void draw_string_bitmap(int x, int y, const char *str, uint32_t color) {
const char *s = str;
int cur_x = x;
int cur_y = y;
while (*s) {
if (*s == '\n') {
cur_x = x;
cur_y += 10;
} else if (*s == '\t') {
cur_x += 8 * 4;
} else {
draw_char_bitmap(cur_x, cur_y, *s, color);
cur_x += 8;
}
s++;
}
}
int graphics_get_font_height(void) {
if (g_current_ttf) {
return (int)((g_current_ttf->ascent - g_current_ttf->descent) * g_current_ttf->scale);
}
return 10; // Fallback bitmap height
}
int graphics_get_font_height_scaled(float scale) {
if (g_current_ttf) {
return font_manager_get_font_height_scaled(g_current_ttf, scale);
}
return 10; // Fallback bitmap height
}
int graphics_get_string_width_scaled(const char *s, float scale) {
if (g_current_ttf) {
return font_manager_get_string_width_scaled(g_current_ttf, s, scale);
}
int len = 0;
while (s && *s) {
uint32_t codepoint = utf8_decode(&s);
if (codepoint == '\t') len += 4;
else len++;
}
return len * 8; // Fallback bitmap width
}
void draw_string(int x, int y, const char *s, uint32_t color) {
if (g_current_ttf) draw_string_scaled(x, y, s, color, g_current_ttf->pixel_height);
else draw_string_scaled(x, y, s, color, 15.0f);
}
void draw_string_scaled(int x, int y, const char *s, uint32_t color, float scale) {
if (!s) return;
int cur_x = x;
if (g_current_ttf) {
int baseline = y + font_manager_get_font_ascent_scaled(g_current_ttf, scale) - 2;
int line_height = font_manager_get_font_line_height_scaled(g_current_ttf, scale);
while (*s) {
uint32_t codepoint = utf8_decode(&s);
if (codepoint == '\n') {
cur_x = x;
baseline += line_height;
} else if (codepoint == '\t') {
cur_x += font_manager_get_codepoint_width_scaled(g_current_ttf, ' ', scale) * 4;
} else {
font_manager_render_char_scaled(g_current_ttf, cur_x, baseline, codepoint, color, scale, put_pixel);
cur_x += font_manager_get_codepoint_width_scaled(g_current_ttf, codepoint, scale);
}
}
return;
}
int cur_y = y;
while (*s) {
uint32_t codepoint = utf8_decode(&s);
if (codepoint == '\n') {
cur_x = x;
cur_y += 10;
} else if (codepoint == '\t') {
cur_x += 8 * 4;
} else {
draw_char(cur_x, cur_y, (codepoint < 128) ? (char)codepoint : '?', color);
cur_x += 8;
}
}
}
void draw_string_sloped(int x, int y, const char *s, uint32_t color, float slope) {
if (g_current_ttf) draw_string_scaled_sloped(x, y, s, color, g_current_ttf->pixel_height, slope);
else draw_string_scaled(x, y, s, color, 15.0f); // Fast fallback if no ttf
}
void draw_string_scaled_sloped(int x, int y, const char *s, uint32_t color, float scale, float slope) {
if (!s) return;
int cur_x = x;
if (g_current_ttf) {
int baseline = y + font_manager_get_font_ascent_scaled(g_current_ttf, scale) - 2;
int line_height = font_manager_get_font_line_height_scaled(g_current_ttf, scale);
while (*s) {
uint32_t codepoint = utf8_decode(&s);
if (codepoint == '\n') {
cur_x = x;
baseline += line_height;
} else if (codepoint == '\t') {
cur_x += font_manager_get_codepoint_width_scaled(g_current_ttf, ' ', scale) * 4;
} else {
font_manager_render_char_sloped(g_current_ttf, cur_x, baseline, codepoint, color, scale, slope, put_pixel);
cur_x += font_manager_get_codepoint_width_scaled(g_current_ttf, codepoint, scale);
}
}
return;
}
// Fallback to normal draw_string_scaled if no TTF
draw_string_scaled(x, y, s, color, scale);
}
void draw_desktop_background(void) {
if (!g_fb) return;
if (g_use_image && g_bg_image) {
// Draw wallpaper image (stretch/scale to screen)
int x1 = 0, y1 = 0, x2 = g_fb->width, y2 = g_fb->height;
uint32_t cpu = smp_this_cpu_id();
if (g_clip_enabled[cpu]) {
int ptr = g_clip_stack_ptr[cpu];
x1 = g_clip_stack_x[cpu][ptr]; y1 = g_clip_stack_y[cpu][ptr];
x2 = g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr]; y2 = g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr];
}
for (int y = y1; y < y2; y++) {
int src_y = y * g_bg_image_h / (int)g_fb->height;
if (src_y >= g_bg_image_h) src_y = g_bg_image_h - 1;
uint32_t *row = &g_back_buffer[y * g_fb->width + x1];
for (int x = x1; x < x2; x++) {
int src_x = x * g_bg_image_w / (int)g_fb->width;
if (src_x >= g_bg_image_w) src_x = g_bg_image_w - 1;
*row++ = g_bg_image[src_y * g_bg_image_w + src_x];
}
}
} else if (g_use_pattern) {
// Optimized tiled pattern: only draw within the clipping/dirty rect
int x1 = 0, y1 = 0, x2 = g_fb->width, y2 = g_fb->height;
uint32_t cpu = smp_this_cpu_id();
if (g_clip_enabled[cpu]) {
int ptr = g_clip_stack_ptr[cpu];
x1 = g_clip_stack_x[cpu][ptr]; y1 = g_clip_stack_y[cpu][ptr];
x2 = g_clip_stack_x[cpu][ptr] + g_clip_stack_w[cpu][ptr]; y2 = g_clip_stack_y[cpu][ptr] + g_clip_stack_h[cpu][ptr];
}
for (int y = y1; y < y2; y++) {
uint32_t *row = &g_back_buffer[y * g_fb->width + x1];
int py = y % PATTERN_SIZE;
for (int x = x1; x < x2; x++) {
*row++ = g_bg_pattern[py * PATTERN_SIZE + (x % PATTERN_SIZE)];
}
}
} else {
// Draw solid color
draw_rect(0, 0, g_fb->width, g_fb->height, g_bg_color);
}
}
void graphics_set_bg_color(uint32_t color) {
g_bg_color = color;
g_use_pattern = false;
g_use_image = false;
}
void graphics_set_bg_pattern(const uint32_t *pattern) {
if (!pattern) return;
// Copy pattern to internal buffer
for (int i = 0; i < PATTERN_SIZE * PATTERN_SIZE; i++) {
g_bg_pattern[i] = pattern[i];
}
g_use_pattern = true;
g_use_image = false;
}
void graphics_set_bg_image(uint32_t *pixels, int w, int h) {
g_bg_image = pixels;
g_bg_image_w = w;
g_bg_image_h = h;
g_use_image = true;
g_use_pattern = false;
}
void graphics_set_logo_pixels(uint32_t *pixels, int w, int h) {
g_logo_pixels = pixels;
g_logo_w = w;
g_logo_h = h;
}
void draw_boredos_logo(int x, int y, int scale) {
if (g_logo_pixels) {
for (int r = 0; r < g_logo_h; r++) {
for (int c = 0; c < g_logo_w; c++) {
uint32_t pixel = g_logo_pixels[r * g_logo_w + c];
uint8_t a = (pixel >> 24) & 0xFF;
if (a == 0) continue;
if (scale == 1) {
if (a == 255) {
put_pixel(x + c, y + r, pixel);
} else {
uint32_t dst = graphics_get_pixel(x + c, y + r);
put_pixel(x + c, y + r, blend_src_over_dst(dst, pixel));
}
} else {
for (int sy = 0; sy < scale; sy++) {
for (int sx = 0; sx < scale; sx++) {
if (a == 255) {
put_pixel(x + (c * scale) + sx, y + (r * scale) + sy, pixel);
} else {
uint32_t dst = graphics_get_pixel(x + (c * scale) + sx, y + (r * scale) + sy);
put_pixel(x + (c * scale) + sx, y + (r * scale) + sy, blend_src_over_dst(dst, pixel));
}
}
}
}
}
}
return;
}
// Width: 60, Height: 16
// 1: Magenta, 2: Blue, 3: Cyan, 4: White, 0: Deadspace
static const uint8_t boredos_bmp[] = {
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
const int bmp_w = 60;
const int bmp_h = 16;
for (int r = 0; r < bmp_h; r++) {
for (int c = 0; c < bmp_w; c++) {
uint8_t p = boredos_bmp[r * bmp_w + c];
if (p == 0) continue;
uint32_t color = 0;
switch(p) {
case 1: color = 0xFFB589D6; break; // Magenta
case 2: color = 0xFF569CD6; break; // Blue
case 3: color = 0xFF4EC9B0; break; // Cyan
case 4: color = 0xFFFFFFFF; break; // White
}
draw_rect(x + (c * scale), y + (r * scale), scale, scale, color);
}
}
}
// Double buffering functions
void graphics_clear_back_buffer(uint32_t color) {
if (!g_fb) return;
uint32_t *buf = g_back_buffer;
for (int i = 0; i < (int)g_fb->width * (int)g_fb->height; i++) {
*buf++ = color;
}
}
void graphics_flip_buffer(void) {
if (!g_fb) return;
uint64_t flags = spinlock_acquire_irqsave(&graphics_lock);
if (!g_dirty.active) {
spinlock_release_irqrestore(&graphics_lock, flags);
return;
}
int x = g_dirty.x;
int y = g_dirty.y;
int w = g_dirty.w;
int h = g_dirty.h;
// Clear dirty state
g_dirty.active = false;
spinlock_release_irqrestore(&graphics_lock, flags);
if (x < 0) { w += x; x = 0; }
if (y < 0) { h += y; y = 0; }
if (x + w > (int)g_fb->width) w = g_fb->width - x;
if (y + h > (int)g_fb->height) h = g_fb->height - y;
if (w <= 0 || h <= 0) return;
for (int i = 0; i < h; i++) {
int curr_y = y + i;
uint32_t *src_row = &g_back_buffer[curr_y * g_fb->width + x];
if (g_fb->bpp == 32) {
extern void mem_memcpy(void *dest, const void *src, size_t len);
uint32_t *dst_row = (uint32_t *)((uint8_t *)g_fb->address + curr_y * g_fb->pitch) + x;
mem_memcpy(dst_row, src_row, w * 4);
} else if (g_fb->bpp == 16) {
uint16_t *dst_row = (uint16_t *)((uint8_t *)g_fb->address + curr_y * g_fb->pitch) + x;
for (int j = 0; j < w; j++) {
uint32_t c = src_row[j];
uint16_t r = ((c >> 16) & 0xFF) >> 3;
uint16_t g = ((c >> 8) & 0xFF) >> 2;
uint16_t b = (c & 0xFF) >> 3;
dst_row[j] = (r << 11) | (g << 5) | b;
}
} else if (g_fb->bpp == 8) {
uint8_t *dst_row = (uint8_t *)((uint8_t *)g_fb->address + curr_y * g_fb->pitch) + x;
if (g_color_mode == 1) { // Grayscale
for (int j = 0; j < w; j++) {
uint32_t c = src_row[j];
uint8_t r = (c >> 16) & 0xFF;
uint8_t g = (c >> 8) & 0xFF;
uint8_t b = c & 0xFF;
dst_row[j] = (uint8_t)((r * 77 + g * 150 + b * 29) >> 8);
}
} else if (g_color_mode == 2) { // Monochrome
static const uint8_t bayer2[2][2] = {
{ 0, 128 },
{192, 64 }
};
for (int j = 0; j < w; j++) {
uint32_t c = src_row[j];
uint8_t r = (c >> 16) & 0xFF;
uint8_t g = (c >> 8) & 0xFF;
uint8_t b = c & 0xFF;
int gray = (r * 77 + g * 150 + b * 29) >> 8;
gray = gray * 2;
if (gray > 255) gray = 255;
int sx = x + j;
uint8_t threshold = bayer2[curr_y & 1][sx & 1];
dst_row[j] = (gray > threshold) ? 255 : 0;
}
} else { // 256 Colors (Standard)
for (int j = 0; j < w; j++) {
uint32_t c = src_row[j];
uint8_t r = ((c >> 16) & 0xFF) >> 5;
uint8_t g = ((c >> 8) & 0xFF) >> 5;
uint8_t b = (c & 0xFF) >> 6;
dst_row[j] = (r << 5) | (g << 2) | b;
}
}
}
}
}
void graphics_copy_screenbuffer(uint32_t *dest) {
if (!g_fb || !dest) return;
extern uint64_t wm_lock_acquire(void);
extern void wm_lock_release(uint64_t);
uint64_t rflags = wm_lock_acquire();
int sw = (int)g_fb->width;
int sh = (int)g_fb->height;
// Copy from the composition back buffer, applying color mode transformations if necessary
for (int y = 0; y < sh; y++) {
uint32_t *src_row = &g_back_buffer[y * sw];
for (int x = 0; x < sw; x++) {
uint32_t px = src_row[x];
if (g_color_mode == 1) { // 8-bit Grayscale
uint8_t r = (px >> 16) & 0xFF;
uint8_t g = (px >> 8) & 0xFF;
uint8_t b = px & 0xFF;
uint8_t gray = (uint8_t)((r * 77 + g * 150 + b * 29) >> 8);
dest[y * sw + x] = 0xFF000000 | (gray << 16) | (gray << 8) | gray;
} else if (g_color_mode == 2) { // 1-bit Monochrome (Dithered)
static const uint8_t bayer2[2][2] = {
{ 0, 128 },
{192, 64 }
};
uint8_t r = (px >> 16) & 0xFF;
uint8_t g = (px >> 8) & 0xFF;
uint8_t b = px & 0xFF;
int gray = (r * 77 + g * 150 + b * 29) >> 8;
// Boost contrast (matches graphics_flip_buffer logic)
gray = gray * 2;
if (gray > 255) gray = 255;
uint8_t threshold = bayer2[y & 1][x & 1];
dest[y * sw + x] = (gray > threshold) ? 0xFFFFFFFF : 0xFF000000;
} else {
// 32-bit (Standard)
dest[y * sw + x] = px;
}
}
}
wm_lock_release(rflags);
}
void graphics_set_clipping(int x, int y, int w, int h) {
if (x < 0) { w += x; x = 0; }
if (y < 0) { h += y; y = 0; }
int sw = get_screen_width();
int sh = get_screen_height();
if (x + w > sw) w = sw - x;
if (y + h > sh) h = sh - y;
if (w < 0) w = 0;
if (h < 0) h = 0;
uint32_t cpu = smp_this_cpu_id();
g_clip_stack_x[cpu][0] = x;
g_clip_stack_y[cpu][0] = y;
g_clip_stack_w[cpu][0] = w;
g_clip_stack_h[cpu][0] = h;
g_clip_stack_ptr[cpu] = 0; // Reset to base
g_clip_enabled[cpu] = true;
}
void graphics_push_clipping(int x, int y, int w, int h) {
uint32_t cpu = smp_this_cpu_id();
int cur_ptr = g_clip_stack_ptr[cpu];
if (cur_ptr + 1 >= CLIP_STACK_DEPTH) return; // Stack overflow
// Intersect with current top
int cx1 = g_clip_stack_x[cpu][cur_ptr];
int cy1 = g_clip_stack_y[cpu][cur_ptr];
int cx2 = cx1 + g_clip_stack_w[cpu][cur_ptr];
int cy2 = cy1 + g_clip_stack_h[cpu][cur_ptr];
int nx1 = x;
int ny1 = y;
int nx2 = x + w;
int ny2 = y + h;
if (nx1 < cx1) nx1 = cx1;
if (ny1 < cy1) ny1 = cy1;
if (nx2 > cx2) nx2 = cx2;
if (ny2 > cy2) ny2 = cy2;
int nw = nx2 - nx1;
int nh = ny2 - ny1;
if (nw < 0) nw = 0;
if (nh < 0) nh = 0;
g_clip_stack_ptr[cpu]++;
g_clip_stack_x[cpu][cur_ptr + 1] = nx1;
g_clip_stack_y[cpu][cur_ptr + 1] = ny1;
g_clip_stack_w[cpu][cur_ptr + 1] = nw;
g_clip_stack_h[cpu][cur_ptr + 1] = nh;
g_clip_enabled[cpu] = true;
}
void graphics_pop_clipping(void) {
uint32_t cpu = smp_this_cpu_id();
if (g_clip_stack_ptr[cpu] > 0) {
g_clip_stack_ptr[cpu]--;
} else {
g_clip_enabled[cpu] = false;
}
}
void graphics_clear_clipping(void) {
uint32_t cpu = smp_this_cpu_id();
g_clip_stack_ptr[cpu] = 0;
g_clip_enabled[cpu] = false;
}
void graphics_blit_buffer(uint32_t *src, int dst_x, int dst_y, int w, int h) {
if (!g_fb || !src) return;
int sw = get_screen_width();
int sh = get_screen_height();
uint32_t cpu = smp_this_cpu_id();
int cx1 = 0, cy1 = 0, cx2 = sw, cy2 = sh;
if (g_clip_enabled[cpu]) {
int ptr = g_clip_stack_ptr[cpu];
cx1 = g_clip_stack_x[cpu][ptr];
cy1 = g_clip_stack_y[cpu][ptr];
cx2 = cx1 + g_clip_stack_w[cpu][ptr];
cy2 = cy1 + g_clip_stack_h[cpu][ptr];
}
int x1 = dst_x, y1 = dst_y, x2 = dst_x + w, y2 = dst_y + h;
if (x1 < cx1) x1 = cx1;
if (y1 < cy1) y1 = cy1;
if (x2 > cx2) x2 = cx2;
if (y2 > cy2) y2 = cy2;
if (x1 >= x2 || y1 >= y2) return;
for (int y = y1; y < y2; y++) {
uint32_t *dst_row = &g_back_buffer[y * sw + x1];
uint32_t *src_row = &src[(y - dst_y) * w + (x1 - dst_x)];
int len = x2 - x1;
for (int x = 0; x < len; x++) {
uint32_t pcol = src_row[x];
if ((pcol & 0xFF000000) != 0 || (pcol & 0xFFFFFF) != 0) {
dst_row[x] = pcol;
}
}
}
}
void graphics_scroll_back_buffer(int lines) {
if (!g_fb || lines <= 0 || lines >= (int)g_fb->height) return;
extern uint64_t wm_lock_acquire(void);
extern void wm_lock_release(uint64_t);
uint64_t rflags = wm_lock_acquire();
int sw = (int)g_fb->width;
int sh = (int)g_fb->height;
for (int y = 0; y < sh - lines; y++) {
uint32_t *dst = &g_back_buffer[y * sw];
uint32_t *src = &g_back_buffer[(y + lines) * sw];
for (int x = 0; x < sw; x++) dst[x] = src[x];
}
for (int y = sh - lines; y < sh; y++) {
uint32_t *dst = &g_back_buffer[y * sw];
for (int x = 0; x < sw; x++) dst[x] = 0;
}
wm_lock_release(rflags);
}
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