1 files changed, 55 insertions, 0 deletions
diff --git a/src/draw.h b/src/draw.h
new file mode 100644
index 0000000..1282563
--- /dev/null
+++ b/src/draw.h
@@ -0,0 +1,55 @@
+#ifndef ANIMTOOL_DRAW_H_
+#define ANIMTOOL_DRAW_H_
+
+#include "util/container.h"
+
+typedef void *rgba_data;
+typedef uint64_t texture_id;
+typedef uint64_t mesh_id;
+
+#define PRItexture_id PRIu64
+#define PRImesh_id PRIu64
+
+enum texture_type
+{
+    TEXTURE_2D,
+    TEXTURE_CUBEMAP,
+};
+
+struct draw_vertex
+{
+    float pos[3];
+    float tex[2];
+    // float normal[3];
+};
+
+struct draw_surface
+{
+    option(texture_id) texture;
+    float color[3];
+};
+
+struct draw_call
+{
+    mesh_id mesh;
+    struct draw_surface surface;
+    float model[4][4];
+};
+
+struct draw_frame
+{
+    option(struct draw_surface) bg;
+    array(struct draw_call) calls;
+    float view_proj[4][4];
+};
+
+struct draw_backend
+{
+    void (*init)(unsigned int size[2]);
+    bool (*create_mesh)(size_t n_verts, const struct draw_vertex verts[n_verts], mesh_id *id);
+    bool (*create_texture)(enum texture_type type, unsigned int size[2], const rgba_data faces[], texture_id *id);
+    void (*draw_frame)(struct draw_frame *frame, rgba_data out_data);
+    void (*cleanup)();
+};
+
+#endif