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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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51
src/kernel/wm.c
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@@ -13,10 +13,21 @@
#include <stddef.h>
#include "wallpaper.h"
#include "fat32.h"
#include "nanojpeg.h"
#define STBI_NO_STDIO
#include "userland/stb_image.h"
#include "memory_manager.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);
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;
}
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
static bool str_starts_with(const char *str, const char *prefix) {
while(*prefix) {
@@ -595,20 +615,17 @@ static uint32_t* thumb_cache_decode(const char *path) {
if (total <= 0) { kfree(buf); return NULL; }
// Decode JPEG
njInit();
if (njDecode(buf, total) != NJ_OK) {
serial_write("[WM] njDecode failed for deferred thumb\n");
njDone();
// Decode image
int img_w, img_h, channels;
unsigned char *img = stbi_load_from_memory(buf, total, &img_w, &img_h, &channels, 4);
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);
kfree(buf);
return NULL;
}
serial_write("[WM] njDecode OK for deferred thumb\n");
int img_w = njGetWidth();
int img_h = njGetHeight();
unsigned char *img = njGetImage();
serial_write("[WM] stbi_load_from_memory OK for deferred thumb\n");
// Store in cache — downscale to 48x48
int slot = thumb_cache_next;
@@ -626,16 +643,16 @@ static uint32_t* thumb_cache_decode(const char *path) {
int sy = ty * img_h / 48;
if (sx >= img_w) sx = img_w - 1;
if (sy >= img_h) sy = img_h - 1;
int idx = (sy * img_w + sx) * 3;
uint32_t r = img[idx], g = img[idx+1], b = img[idx+2];
thumb_cache[slot].pixels[ty * 48 + tx] = 0xFF000000 | (r << 16) | (g << 8) | b;
int idx = (sy * img_w + sx) * 4;
uint32_t r = img[idx], g = img[idx+1], b = img[idx+2], a = img[idx+3];
thumb_cache[slot].pixels[ty * 48 + tx] = (a << 24) | (r << 16) | (g << 8) | b;
}
}
thumb_cache[slot].valid = true;
thumb_cache[slot].failed = false;
njDone();
stbi_image_free(img);
kfree(buf);
return thumb_cache[slot].pixels;
@@ -1226,7 +1243,7 @@ void wm_paint(void) {
} else {
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, ".jpg") || str_ends_with(icon->name, ".JPG")) {
else if (is_image_file(icon->name)) {
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;
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);
} else if (str_ends_with(icon->name, ".md")) {
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);
} else {
process_create_elf("/bin/txtedit.elf", path);