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tweak: increase thumbnail cache wm.c

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boreddevnl 2026-04-20 19:43:48 +02:00
parent b865023dc2
commit 840c0a0be4
1 changed files with 43 additions and 12 deletions
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55
src/wm/wm.c
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@ -898,8 +898,7 @@ void draw_elf_icon(int x, int y, const char *label) {
draw_icon_label(x, y, label); draw_icon_label(x, y, label);
} }
// === Dynamic thumbnail cache for JPG explorer icons === #define THUMB_CACHE_SIZE 128
#define THUMB_CACHE_SIZE 8
#define THUMB_PIXELS (48 * 48) #define THUMB_PIXELS (48 * 48)
static struct { static struct {
char path[FAT32_MAX_PATH]; char path[FAT32_MAX_PATH];
@ -910,7 +909,7 @@ static struct {
static int thumb_cache_next = 0; // Round-robin eviction static int thumb_cache_next = 0; // Round-robin eviction
// Deferred Thumbnail Request Queue // Deferred Thumbnail Request Queue
#define THUMB_QUEUE_SIZE 16 #define THUMB_QUEUE_SIZE 128
static char thumb_request_queue[THUMB_QUEUE_SIZE][FAT32_MAX_PATH]; static char thumb_request_queue[THUMB_QUEUE_SIZE][FAT32_MAX_PATH];
static int thumb_queue_head = 0; static int thumb_queue_head = 0;
static int thumb_queue_tail = 0; static int thumb_queue_tail = 0;
@ -954,21 +953,49 @@ static uint32_t* thumb_cache_lookup(const char *path) {
return NULL; return NULL;
} }
static void thumb_cache_mark_failed(const char *path) {
if (!path || !path[0]) return;
int slot = thumb_cache_next;
thumb_cache_next = (thumb_cache_next + 1) % THUMB_CACHE_SIZE;
int p = 0;
while (path[p] && p < FAT32_MAX_PATH - 1) {
thumb_cache[slot].path[p] = path[p];
p++;
}
thumb_cache[slot].path[p] = 0;
thumb_cache[slot].valid = false;
thumb_cache[slot].failed = true;
}
static uint32_t* thumb_cache_decode(const char *path) { static uint32_t* thumb_cache_decode(const char *path) {
uint32_t *cached = thumb_cache_lookup(path);
if (cached) return cached;
if (thumb_cache_is_failed(path)) return NULL;
// Open and read the JPG file // Open and read the JPG file
FAT32_FileHandle *fh = fat32_open(path, "r"); FAT32_FileHandle *fh = fat32_open(path, "r");
if (!fh) return NULL; if (!fh) {
thumb_cache_mark_failed(path);
return NULL;
}
uint32_t file_size = fh->size; uint32_t file_size = fh->size;
if (file_size == 0 || file_size > 8 * 1024 * 1024) { if (file_size == 0 || file_size > 8 * 1024 * 1024) {
fat32_close(fh); fat32_close(fh);
thumb_cache_mark_failed(path);
return NULL; return NULL;
} }
unsigned char *buf = (unsigned char*)kmalloc(file_size); unsigned char *buf = (unsigned char*)kmalloc(file_size);
if (!buf) { fat32_close(fh); return NULL; } if (!buf) {
fat32_close(fh);
thumb_cache_mark_failed(path);
return NULL;
}
int total = 0; int total = 0;
while (total < (int)file_size) { while (total < (int)file_size) {
@ -978,20 +1005,22 @@ static uint32_t* thumb_cache_decode(const char *path) {
} }
fat32_close(fh); fat32_close(fh);
if (total <= 0) { kfree(buf); return NULL; } if (total <= 0) {
kfree(buf);
thumb_cache_mark_failed(path);
return NULL;
}
// Decode image // Decode image
int img_w, img_h, channels; int img_w, img_h, channels;
unsigned char *img = stbi_load_from_memory(buf, total, &img_w, &img_h, &channels, 4); unsigned char *img = stbi_load_from_memory(buf, total, &img_w, &img_h, &channels, 4);
if (!img || img_w <= 0 || img_h <= 0) { if (!img || img_w <= 0 || img_h <= 0) {
serial_write("[WM] stbi_load_from_memory failed for deferred thumb\n");
if (img) stbi_image_free(img); if (img) stbi_image_free(img);
kfree(buf); kfree(buf);
thumb_cache_mark_failed(path);
return NULL; return NULL;
} }
serial_write("[WM] stbi_load_from_memory OK for deferred thumb\n");
// Store in cache — downscale to 48x48 // Store in cache — downscale to 48x48
int slot = thumb_cache_next; int slot = thumb_cache_next;
thumb_cache_next = (thumb_cache_next + 1) % THUMB_CACHE_SIZE; thumb_cache_next = (thumb_cache_next + 1) % THUMB_CACHE_SIZE;
@ -3288,9 +3317,11 @@ void wm_process_deferred_thumbs(void) {
// Pop from queue // Pop from queue
thumb_queue_head = (thumb_queue_head + 1) % THUMB_QUEUE_SIZE; thumb_queue_head = (thumb_queue_head + 1) % THUMB_QUEUE_SIZE;
// Process (this takes time but it's okay because we are in the main loop with IRQs enabled) if (thumb_cache_lookup(path) || thumb_cache_is_failed(path)) return;
thumb_cache_decode(path);
force_redraw = true; if (thumb_cache_decode(path)) {
force_redraw = true;
}
} }
void wm_init(void) { void wm_init(void) {