add rotating cheese

This adds the Cheese3D graphics api and makes the cheese command display a cheese rotating in 3d as a demo

1 files changed, 37 insertions, 0 deletions

diff --git a/stage3/cheese3d.h b/stage3/cheese3d.h
new file mode 100644
index 0000000..f93872f
--- /dev/null
+++ b/stage3/cheese3d.h
@@ -0,0 +1,37 @@
+#ifndef CHEESE3D_H
+#define CHEESE3D_H
+
+// Cheese3D is the cuddlesOS 3d graphics API
+
+#include "def.h"
+
+typedef struct {
+	float pos[3];
+	float tex[2];
+} vertex;
+
+typedef struct {
+	u32 w, h;
+	u32 *data;
+} texture;
+
+typedef struct {
+	u32 width;
+	u32 height;
+	u32 pitch;
+	u32 bgcolor;
+	float *depth_buffer;
+	void *color_buffer;
+} cheese3d_ctx;
+
+#define VERT(x, y, z, s, t) { { x, y, z }, { s, t } } // this exists to work with the QUAD macro
+#define QUAD(a, b, c, d) a, b, c, a, c, d
+
+cheese3d_ctx cheese3d_create(u32 width, u32 height, u32 pitch, u32 bgcolor);
+cheese3d_ctx cheese3d_create_default(u32 bgcolor);
+void cheese3d_destroy(cheese3d_ctx ctx);
+void cheese3d_clear(cheese3d_ctx ctx, bool color, bool depth);
+void cheese3d_render(cheese3d_ctx ctx, usize num, vertex *vertices, texture *textures, float transform[4][4]);
+void cheese3d_display(cheese3d_ctx ctx);
+
+#endif