Framebuffer first

src/dusksdl2/display/renderbackbuffer.c

@@ -7,6 +7,8 @@
 
 #include "renderbackbuffer.h"
 #include "render.h"
+#include "display/spritebatch/spritebatch.h"
+#include "display/camera/camera.h"
 
 #if RENDER_USE_FRAMEBUFFER
   SDL_Texture *RENDER_BACKBUFFER;
@@ -16,20 +18,20 @@
 
 errorret_t renderBackBufferInit(void) {
   #if RENDER_USE_FRAMEBUFFER
-    RENDER_BACKBUFFER = SDL_CreateTexture(
-      RENDER_RENDERER,
-      SDL_PIXELFORMAT_RGBA8888,
-      SDL_TEXTUREACCESS_TARGET,
-      RENDER_WIDTH,
-      RENDER_HEIGHT
-    );
+    // RENDER_BACKBUFFER = SDL_CreateTexture(
+    //   RENDER_RENDERER,
+    //   SDL_PIXELFORMAT_RGBA8888,
+    //   SDL_TEXTUREACCESS_TARGET,
+    //   RENDER_WIDTH,
+    //   RENDER_HEIGHT
+    // );
 
     if(!RENDER_BACKBUFFER) {
       errorThrow("SDL_CreateTexture failed: %s", SDL_GetError());
     }
 
     // Make sure we unbind the back buffer after creation
-    SDL_SetRenderTarget(RENDER_RENDERER, NULL);
+    // SDL_SetRenderTarget(RENDER_RENDERER, NULL);
   #else
     // No back buffer needed for window rendering
   #endif
@@ -39,30 +41,31 @@ errorret_t renderBackBufferInit(void) {
 
 void renderBackBufferBind(void) {
   #if RENDER_USE_FRAMEBUFFER
-    SDL_SetRenderTarget(RENDER_RENDERER, RENDER_BACKBUFFER);
+    // SDL_SetRenderTarget(RENDER_RENDERER, RENDER_BACKBUFFER);
   #endif
   
   // Fill background with cornflower blue.
-  SDL_SetRenderDrawColor(RENDER_RENDERER, 100, 149, 237, 255);
-  SDL_RenderClear(RENDER_RENDERER);
+  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
-    SDL_SetRenderTarget(RENDER_RENDERER, NULL);
+    // SDL_SetRenderTarget(RENDER_RENDERER, NULL);
   #endif
 }
 
 void renderBackBufferDraw(void) {
   #if RENDER_USE_FRAMEBUFFER
-    // Clear background black
-    SDL_SetRenderDrawColor(RENDER_RENDERER, 0, 0, 0, 255);
-    SDL_RenderClear(RENDER_RENDERER);
-
-    // Create a quad that is scaled to fit but maintain original aspect ratio
     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;
@@ -77,8 +80,16 @@ void renderBackBufferDraw(void) {
     }
 
     // Draw the back buffer texture
-    SDL_Rect destRect = { renderX, renderY, renderWidth, renderHeight };
-    SDL_RenderCopy(RENDER_RENDERER, RENDER_BACKBUFFER, NULL, &destRect);
+    spriteBatchClear();
+    spriteBatchPush(
+      NULL,
+      renderX, renderY,
+      renderX+renderWidth, renderY+renderHeight,
+      0xFF, 0x00, 0xFF, 0xFF,
+      0, 0, 1, 1
+    );
+    spriteBatchFlush();
+    cameraScreenPop();
   #else
     // No back buffer to draw
   #endif