SDL time

src/dusksdl2/display/CMakeLists.txt

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+# Copyright (c) 2025 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DUSK_TARGET_NAME}
+  PRIVATE
+    render.c
+)
+
+# Subdirs
+# add_subdirectory(draw)

src/dusksdl2/display/render.c

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "render.h"
+#include "assert/assert.h"
+
+SDL_Window *RENDER_WINDOW;
+SDL_Renderer *RENDER_RENDERER;
+bool_t RENDER_RUNNING;
+
+errorret_t renderInit(void) {
+  if(SDL_Init(SDL_INIT_VIDEO) != 0) {
+    errorThrow(
+      "SDL Failed to Initialize: %s",
+      SDL_GetError()
+    );
+  }
+
+  RENDER_WINDOW = SDL_CreateWindow(
+    "DuskSDL2",
+    SDL_WINDOWPOS_UNDEFINED,
+    SDL_WINDOWPOS_UNDEFINED,
+    RENDER_WINDOW_WIDTH_DEFAULT,
+    RENDER_WINDOW_HEIGHT_DEFAULT,
+    SDL_WINDOW_SHOWN
+  );
+
+  #if RENDER_USE_FRAMEBUFFER
+    printf("Using framebuffer for rendering\n");
+  #else
+    printf("Using window for rendering\n");
+  #endif
+
+  RENDER_RENDERER = SDL_CreateRenderer(
+    RENDER_WINDOW,
+    -1,
+    SDL_RENDERER_ACCELERATED
+  );
+
+  if(!RENDER_RENDERER) {
+    errorThrow("SDL_CreateRenderer failed: %s", SDL_GetError());
+  }
+
+  RENDER_RUNNING = true;
+
+  errorOk();
+}
+
+errorret_t renderDraw(void) {
+  SDL_Event event;
+  while(SDL_PollEvent(&event)) {
+    if(event.type == SDL_QUIT) {
+      RENDER_RUNNING = false;
+    }
+  }
+
+  SDL_SetRenderDrawColor(RENDER_RENDERER, 0, 0, 0, 255);
+  SDL_RenderClear(RENDER_RENDERER);
+  
+  // Draw red triangle
+  SDL_SetRenderDrawColor(RENDER_RENDERER, 255, 0, 0, 255);
+  SDL_RenderDrawLine(RENDER_RENDERER, 100, 100, 200, 100);
+  SDL_RenderDrawLine(RENDER_RENDERER, 200, 100, 150, 50);
+  SDL_RenderDrawLine(RENDER_RENDERER, 150, 50, 100, 100);
+
+  SDL_RenderPresent(RENDER_RENDERER);
+
+  RENDER_FRAME++;
+
+  errorOk();
+}
+
+errorret_t renderDispose(void) {
+  SDL_DestroyRenderer(RENDER_RENDERER);
+  SDL_DestroyWindow(RENDER_WINDOW);
+  SDL_Quit();
+
+  errorOk();
+}

src/dusksdl2/display/render.h

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusksdl2.h"
+#include "display/renderbase.h"
+
+#ifndef RENDER_WINDOW_WIDTH_DEFAULT
+  #define RENDER_WINDOW_WIDTH_DEFAULT RENDER_WIDTH * 3
+#endif
+#ifndef RENDER_WINDOW_HEIGHT_DEFAULT
+  #define RENDER_WINDOW_HEIGHT_DEFAULT RENDER_HEIGHT * 3
+#endif
+
+#if RENDER_WIDTH == RENDER_WINDOW_WIDTH_DEFAULT && RENDER_HEIGHT == RENDER_WINDOW_HEIGHT_DEFAULT
+  #define RENDER_USE_FRAMEBUFFER 0
+#else
+  #define RENDER_USE_FRAMEBUFFER 1
+#endif
+
+extern SDL_Window *RENDER_WINDOW;
+extern SDL_Renderer *RENDER_RENDERER;
+extern bool_t RENDER_RUNNING;

src/dusksdl2/display/renderbackbuffer.c

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "renderbackbuffer.h"
+
+#if RENDER_USE_FRAMEBUFFER
+SDL_Texture *RENDER_BACKBUFFER;
+#else
+
+#endif
+
+void renderBackBufferInit(void) {
+  #if RENDER_USE_FRAMEBUFFER
+    RENDER_BACKBUFFER = SDL_CreateTexture(
+      RENDER_RENDERER,
+      SDL_PIXELFORMAT_RGBA8888,
+      SDL_TEXTUREACCESS_TARGET,
+      RENDER_WINDOW_WIDTH_DEFAULT,
+      RENDER_WINDOW_HEIGHT_DEFAULT
+    );
+
+    if(!RENDER_BACKBUFFER) {
+      assertUnreachable("SDL_CreateTexture failed\n");
+      return;
+    }
+  #else
+    // No back buffer needed for window rendering
+  #endif
+
+  
+}

src/dusksdl2/display/renderbackbuffer.h

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusksdl2.h"