Async load images

1 files changed, 45 insertions, 0 deletions

diff --git a/include/async_image.h b/include/async_image.h
new file mode 100644
index 0000000..a108d5e
--- /dev/null
+++ b/include/async_image.h
@@ -0,0 +1,45 @@
+#ifndef MGUI_ASYNC_IMAGE_H
+#define MGUI_ASYNC_IMAGE_H
+
+#include <mgl/graphics/image.h>
+#include <mgl/graphics/texture.h>
+#include <stdint.h>
+
+typedef struct mgui_async_image mgui_async_image;
+
+typedef enum {
+    MGUI_ASYNC_IMAGE_NOT_LOADED,
+    MGUI_ASYNC_IMAGE_LOADING,
+    MGUI_ASYNC_IMAGE_LOADED,
+    MGUI_ASYNC_IMAGE_APPLIED,
+    MGUI_ASYNC_IMAGE_FAILED_TO_LOAD,
+    MGUI_ASYNC_IMAGE_UNLOADED
+} mgui_async_image_state;
+
+struct mgui_async_image {
+    mgl_image image;
+    mgl_texture texture;
+    uint64_t hash;
+    mgui_async_image_state state;
+    uint32_t updated;
+    uint32_t ref_count;
+    char *filepath;
+};
+
+/* Do not call this manually */
+void mgui_async_image_init();
+/* Do not call this manually */
+void mgui_async_image_deinit();
+/* Do not call this manually */
+void mgui_async_image_unload_unreferenced();
+
+/*
+    Increases reference count by 1 every time this is called.
+    Call |mgui_async_image_unref| when done with the image so it can be unloaded when all references are gone.
+*/
+mgui_async_image* mgui_async_image_get_by_path(const char *filepath);
+/* Needs to be called at least once a frame to keep the image from being unloaded */
+void mgui_async_image_update(mgui_async_image *self);
+void mgui_async_image_unref(mgui_async_image *self);
+
+#endif /* MGUI_ASYNC_IMAGE_H */