Add backbuffer

src/display/framebuffer/framebuffer.h

@@ -0,0 +1,75 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "display/display.h"
+#include "display/texture/texture.h"
+
+typedef struct {
+  #if DUSK_DISPLAY_SDL2
+    // OpenGL Framebuffer Object ID
+    GLuint id;
+  #endif
+} framebuffer_t;
+
+extern framebuffer_t FRAMEBUFFER_BACKBUFFER;
+extern const framebuffer_t *FRAMEBUFFER_BOUND;
+
+void frameBufferInitBackbuffer();
+
+/**
+ * Gets the width of the framebuffer.
+ * 
+ * @param framebuffer The framebuffer to get the width of.
+ * @return The width of the framebuffer, or 0 if the framebuffer is NULL.
+ */
+int32_t frameBufferGetWidth(const framebuffer_t *framebuffer);
+
+/**
+ * Gets the height of the framebuffer.
+ * 
+ * @param framebuffer The framebuffer to get the height of.
+ * @return The height of the framebuffer, or 0 if the framebuffer is NULL.
+ */
+int32_t frameBufferGetHeight(const framebuffer_t *framebuffer);
+
+/**
+ * Binds the framebuffer for rendering, or the backbuffer if the framebuffer 
+ * provided is NULL.
+ * 
+ * @param framebuffer The framebuffer to bind, or NULL to bind the backbuffer.
+ */
+void frameBufferBind(const framebuffer_t *framebuffer);
+
+/**
+ * Disposes of the framebuffer using EXT methods.
+ * 
+ * @param framebuffer The framebuffer to dispose of.
+ */
+void frameBufferDispose(framebuffer_t *framebuffer);
+
+// #if RENDER_USE_FRAMEBUFFER
+//   typedef struct {
+//     GLuint id;
+//     texture_t texture;
+//   } framebuffer_t;
+
+//   /**
+//    * Initializes a framebuffer using EXT methods.
+//    * 
+//    * @param framebuffer The framebuffer to initialize.
+//    * @param width The width of the framebuffer.
+//    * @param height The height of the framebuffer.
+//    * @return An error code indicating success or failure.
+//    */
+//   void frameBufferInit(
+//     framebuffer_t *framebuffer,
+//     const uint32_t width,
+//     const uint32_t height
+//   );
+
+// #endif