archivemuh

2025-08-20 19:18:38 -05:00
parent 1411c2e96b
commit fbfcbe9578
173 changed files with 2802 additions and 13 deletions
--- a/archive/dusksdl2/display/renderbackbuffer.c
+++ b/archive/dusksdl2/display/renderbackbuffer.c
@@ -0,0 +1,93 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "renderbackbuffer.h"
+#include "render.h"
+#include "display/spritebatch/spritebatch.h"
+#include "display/camera/camera.h"
+
+#if RENDER_USE_FRAMEBUFFER
+  framebuffer_t RENDER_BACKBUFFER;
+#endif
+
+errorret_t renderBackBufferInit(void) {
+  #if RENDER_USE_FRAMEBUFFER
+    frameBufferInit(
+      &RENDER_BACKBUFFER,
+      RENDER_WIDTH,
+      RENDER_HEIGHT
+    );
+  #else
+    // No back buffer needed for window rendering
+  #endif
+
+  errorOk();
+}
+
+void renderBackBufferBind(void) {
+  #if RENDER_USE_FRAMEBUFFER
+    frameBufferBind(&RENDER_BACKBUFFER);
+  #endif
+  
+  // Fill background with cornflower blue.
+  glClearColor(0.392f, 0.584f, 0.929f, 1.0f);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+void renderBackBufferUnbind(void) {
+  #if RENDER_USE_FRAMEBUFFER
+    frameBufferBind(NULL);
+  #endif
+}
+
+void renderBackBufferDraw(void) {
+  #if RENDER_USE_FRAMEBUFFER
+    int32_t windowWidth, windowHeight;
+    SDL_GetWindowSize(RENDER_WINDOW, &windowWidth, &windowHeight);
+
+    // Set viewport to match window size
+    cameraScreenPush();
+    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    // Create a quad that is scaled to fit but maintain original aspect ratio
+    int32_t renderWidth, renderHeight, renderX, renderY;
+    if(RENDER_WIDTH * windowHeight > RENDER_HEIGHT * windowWidth) {
+      renderWidth = windowWidth;
+      renderHeight = (RENDER_HEIGHT * windowWidth) / RENDER_WIDTH;
+      renderX = 0;
+      renderY = (windowHeight - renderHeight) / 2;
+    } else {
+      renderWidth = (RENDER_WIDTH * windowHeight) / RENDER_HEIGHT;
+      renderHeight = windowHeight;
+      renderX = (windowWidth - renderWidth) / 2;
+      renderY = 0;
+    }
+
+    // Draw the back buffer texture
+    spriteBatchClear();
+    spriteBatchPush(
+      &RENDER_BACKBUFFER.texture,
+      renderX, renderY,
+      renderX+renderWidth, renderY+renderHeight,
+      0xFF, 0xFF, 0xFF, 0xFF,
+      0, 1, 1, 0
+    );
+    spriteBatchFlush();
+    cameraScreenPop();
+  #else
+    // No back buffer to draw
+  #endif
+}
+
+errorret_t renderBackBufferDispose(void) {
+  #if RENDER_USE_FRAMEBUFFER
+    frameBufferDispose(&RENDER_BACKBUFFER);
+  #endif
+
+  errorOk();
+}