initial

image.c

@@ -0,0 +1,41 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+#include "image.h"
+#include <stdlib.h>
+
+int image_load(image_t *img, const char *filename) {
+    int ch;
+    img->data = stbi_load(filename, &img->width, &img->height, &ch, 3);
+    return img->data != NULL;
+}
+
+int image_resize(image_t *src, image_t *dst, int new_w, int new_h) {
+    dst->width = new_w;
+    dst->height = new_h;
+    dst->data = malloc(new_w * new_h * 3);
+    if (!dst->data) return 0;
+
+    for (int y = 0; y < new_h; y++) {
+        for (int x = 0; x < new_w; x++) {
+            int sx = x * src->width / new_w;
+            int sy = y * src->height / new_h;
+            for (int c = 0; c < 3; c++) {
+                dst->data[(y*new_w + x)*3 + c] =
+                    src->data[(sy*src->width + sx)*3 + c];
+            }
+        }
+    }
+    return 1;
+}
+
+void image_free(image_t *img) {
+    if (img->data)
+        stbi_image_free(img->data);
+    img->data = NULL;
+}
+
+void image_free_raw(image_t *img) {
+    if (img->data)
+        free(img->data);
+    img->data = NULL;
+}