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archive/old_display_system/display/framebuffer/framebuffer.c

@@ -0,0 +1,77 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "framebuffer.h"
+#include "display/display.h"
+#include "assert/assert.h"
+#include "util/memory.h"
+
+framebuffer_t FRAMEBUFFER_BACKBUFFER = {0};
+const framebuffer_t *FRAMEBUFFER_BOUND = &FRAMEBUFFER_BACKBUFFER;
+
+errorret_t frameBufferInitBackBuffer() {
+  memoryZero(&FRAMEBUFFER_BACKBUFFER, sizeof(framebuffer_t));
+  errorChain(frameBufferPlatformInitBackBuffer());
+  FRAMEBUFFER_BOUND = &FRAMEBUFFER_BACKBUFFER;
+  errorOk();
+}
+
+errorret_t frameBufferBind(framebuffer_t *framebuffer) {
+  if(framebuffer == NULL) {
+    frameBufferBind(&FRAMEBUFFER_BACKBUFFER);
+    FRAMEBUFFER_BOUND = &FRAMEBUFFER_BACKBUFFER;
+    errorOk();
+  }
+
+  errorChain(frameBufferPlatformBind(framebuffer));
+  FRAMEBUFFER_BOUND = framebuffer;
+  errorOk();
+}
+
+uint32_t frameBufferGetWidth(const framebuffer_t *framebuffer) {
+  return frameBufferPlatformGetWidth(framebuffer);
+}
+
+uint32_t frameBufferGetHeight(const framebuffer_t *framebuffer) {
+  return frameBufferPlatformGetHeight(framebuffer);
+}
+
+float_t frameBufferGetAspect(const framebuffer_t *framebuffer) {
+  #ifdef frameBufferPlatformGetAspect
+    return frameBufferPlatformGetAspect(framebuffer);
+  #endif
+  
+  uint32_t width = frameBufferGetWidth(framebuffer);
+  uint32_t height = frameBufferGetHeight(framebuffer);
+  if(height == 0) return 1.0f; // Avoid divide by zero, just return 1:1 aspect.
+  return (float_t)width / (float_t)height;
+}
+
+void frameBufferClear(const uint8_t flags, const color_t color) {
+  frameBufferPlatformClear(flags, color);
+}
+
+#ifdef DUSK_DISPLAY_SIZE_DYNAMIC
+  errorret_t frameBufferInit(
+    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));
+    errorChain(frameBufferPlatformInit(fb, width, height));
+    errorOk();
+  }
+  
+  errorret_t frameBufferDispose(framebuffer_t *framebuffer) {
+    assertNotNull(framebuffer, "Framebuffer cannot be NULL");
+    errorChain(frameBufferPlatformDispose(framebuffer));
+    errorOk();
+  }
+#endif