Initial Commit

allegro_qoi.c

@@ -0,0 +1,66 @@
+#include <stdlib.h>
+#define QOI_IMPLEMENTATION
+#include <qoi.h>
+#include <allegro5/allegro5.h>
+#include <allegro5/bitmap.h>
+#include <allegro5/bitmap_io.h>
+#include <allegro5/bitmap_lock.h>
+#include <allegro5/color.h>
+#include <allegro5/file.h>
+#include <allegro5/bitmap_lock.h>
+
+ALLEGRO_BITMAP* _al_load_qoi_f(ALLEGRO_FILE* filename, int flags) {
+	qoi_desc meta;
+	void* data = qoi_read("sample.qoi", &meta, 4);
+	if (!data) return NULL;
+
+	ALLEGRO_BITMAP* bmp = al_create_bitmap(meta.width, meta.height);
+	ALLEGRO_LOCKED_REGION* lock = al_lock_bitmap(
+			bmp,
+			ALLEGRO_PIXEL_FORMAT_ABGR_8888,
+			ALLEGRO_LOCK_WRITEONLY
+	);
+	if (!lock) return NULL;
+
+	lock->data = data;
+
+	al_unlock_bitmap(bmp);
+	return bmp;
+}
+
+ALLEGRO_BITMAP* _al_load_qoi(const char* filename, int flags) {
+	ALLEGRO_FILE* fp;
+	ALLEGRO_BITMAP* bmp;
+
+	ALLEGRO_ASSERT(filename);
+
+	fp = al_fopen(filename, "rb");
+	if (!fp) {
+		//ALLEGRO_ERROR("Unable to open %s for reading.\n", filename);
+		return NULL;
+	}
+
+	bmp = _al_load_qoi_f(fp, flags);
+
+	al_fclose(fp);
+	return bmp;
+}
+
+bool _al_identify_qoi(ALLEGRO_FILE* f) {
+  uint32_t magic_found;
+  uint32_t magic_expected = 1718185841;
+	magic_found = al_fread32le(f);
+	if (magic_found != magic_expected)
+  	return false;
+  if (!al_fseek(f, 14 - 4, ALLEGRO_SEEK_CUR)) // check for min size 14-byte header minus 32-bit magic
+    return false;
+  return true;
+}
+
+bool al_init_qoi() {
+  int insane = 0;
+  insane |= al_register_bitmap_loader(".qoi", _al_load_qoi);
+  insane |= al_register_bitmap_loader_f(".qoi", _al_load_qoi_f);
+  insane |= al_register_bitmap_identifier(".qoi", _al_identify_qoi);
+  return insane;
+}

allegro_qoi.h

@@ -0,0 +1,9 @@
+#ifndef ALLEGRO_QOI_H
+#define ALLEGRO_QOI_H
+
+#include <allegro5/allegro5.h>
+ALLEGRO_BITMAP* _al_load_qoi_f(ALLEGRO_FILE* filename, int flags);
+ALLEGRO_BITMAP* _al_load_qoi(const char* filename, int flags);
+bool _al_identify_qoi(ALLEGRO_FILE* f);
+
+#endif //ALLEGRO_QOI_H