Moved a bunch of code around

src/duskgl/display/framebuffer/framebuffergl.c

@@ -0,0 +1,133 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "display/display.h"
+#include "display/framebuffer/framebuffer.h"
+#include "assert/assert.h"
+
+errorret_t frameBufferGLInitBackBuffer(void) {
+  errorOk();
+}
+
+uint32_t frameBufferGetWidth(const framebuffer_t *framebuffer) {
+  if(framebuffer == NULL) {
+    return 0;
+  }
+
+  if(framebuffer == &FRAMEBUFFER_BACKBUFFER) {
+    #ifdef DUSK_DISPLAY_SIZE_DYNAMIC
+      int32_t windowWidth, windowHeight;
+      SDL_GetWindowSize(DISPLAY.window, &windowWidth, &windowHeight);
+      return windowWidth;
+    #else
+      return DUSK_DISPLAY_WIDTH;
+    #endif
+  }
+
+  return framebuffer->texture.width;
+}
+
+uint32_t frameBufferGLGetHeight(const framebuffer_t *framebuffer) {
+  if(framebuffer == NULL) {
+    return 0;
+  }
+
+  if(framebuffer == &FRAMEBUFFER_BACKBUFFER) {
+    #ifdef DUSK_DISPLAY_SIZE_DYNAMIC
+      int32_t windowWidth, windowHeight;
+      SDL_GetWindowSize(DISPLAY.window, &windowWidth, &windowHeight);
+      return windowHeight;
+    #else
+      return DUSK_DISPLAY_HEIGHT;
+    #endif
+  }
+
+  return framebuffer->texture.height;
+}
+
+errorret_t frameBufferGLBind(framebuffer_t *framebuffer) {
+  assertNotNull(framebuffer, "Framebuffer cannot be NULL");
+
+  #ifdef DUSK_DISPLAY_SIZE_DYNAMIC
+    if(framebuffer == &FRAMEBUFFER_BACKBUFFER) {
+      glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+    } else {
+      glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebuffer->id);
+    }
+    
+    glViewport(
+      0, 0,
+      frameBufferGetWidth(framebuffer), frameBufferGetHeight(framebuffer)
+    );
+  #else
+    glViewport(
+      0, 0,
+      DUSK_DISPLAY_WIDTH, DUSK_DISPLAY_HEIGHT
+    );
+  #endif
+    
+  errorChain(errorGLCheck());
+  errorOk();
+}
+
+void frameBufferClear(const uint8_t flags, const color_t color) {
+  GLbitfield glFlags = 0;
+
+  if(flags & FRAMEBUFFER_CLEAR_COLOR) {
+    glFlags |= GL_COLOR_BUFFER_BIT;
+    glClearColor(
+      color.r / 255.0f,
+      color.g / 255.0f,
+      color.b / 255.0f,
+      color.a / 255.0f
+    );
+  }
+
+  if(flags & FRAMEBUFFER_CLEAR_DEPTH) {
+    glFlags |= GL_DEPTH_BUFFER_BIT;
+  }
+
+  glClear(glFlags);
+}
+
+#ifdef DUSK_DISPLAY_SIZE_DYNAMIC
+  errorret_t frameBufferGLInit(
+    framebuffer_t *fb,
+    const uint32_t width,
+    const uint32_t height
+  ) {
+    assertNotNull(fb, "Framebuffer cannot be NULL");
+    assertTrue(width > 0 && height > 0, "W/H must be greater than 0");
+
+    memoryZero(fb, sizeof(framebuffer_t));
+    textureInit(&fb->texture, width, height, TEXTURE_FORMAT_RGBA,(texturedata_t){
+      .rgbaColors = NULL
+    });
+    errorChain(errorGLCheck());
+
+    glGenFramebuffersEXT(1, &fb->id);
+    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb->id);
+    errorChain(errorGLCheck());
+
+    glFramebufferTexture2DEXT(
+      GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+      GL_TEXTURE_2D, fb->texture.id, 0
+    );
+    errorChain(errorGLCheck());
+
+    if(
+      glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) !=
+      GL_FRAMEBUFFER_COMPLETE_EXT
+    ) {
+      assertUnreachable("Framebuffer is not complete");
+    }
+
+    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+    errorChain(errorGLCheck());
+    errorOk();
+  }
+#endif