archivemuh

archive/dusksdl2/display/render.c

@@ -0,0 +1,119 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusksdl2input.h"
+#include "render.h"
+#include "renderbackbuffer.h"
+#include "display/scene/renderscene.h"
+#include "display/spritebatch/spritebatch.h"
+#include "display/ui/renderui.h"
+
+SDL_Window *RENDER_WINDOW;
+SDL_GLContext RENDER_GL_CONTEXT;
+bool_t RENDER_RUNNING;
+
+errorret_t renderInit(void) {
+  // Init SDL 
+  uint32_t flags = SDL_INIT_VIDEO;
+  #if INPUT_SUPPORT_GAMEPAD
+    flags |= SDL_INIT_GAMECONTROLLER;
+  #endif
+
+  if(SDL_Init(flags) != 0) {
+    errorThrow(
+      "SDL Failed to Initialize: %s",
+      SDL_GetError()
+    );
+  }
+
+  // Set OpenGL attributes (Needs to be done now or later?)
+  SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+  // Create window with OpenGL flag.
+  RENDER_WINDOW = SDL_CreateWindow(
+    "DuskSDL2",
+    SDL_WINDOWPOS_UNDEFINED,
+    SDL_WINDOWPOS_UNDEFINED,
+    RENDER_WINDOW_WIDTH_DEFAULT,
+    RENDER_WINDOW_HEIGHT_DEFAULT,
+    SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI |
+    SDL_WINDOW_OPENGL
+  );
+  if(!RENDER_WINDOW) {
+    errorThrow("SDL_CreateWindow failed: %s", SDL_GetError());
+  }
+
+  // Create OpenGL context
+  RENDER_GL_CONTEXT = SDL_GL_CreateContext(RENDER_WINDOW);
+  if(!RENDER_GL_CONTEXT) {
+    errorThrow("SDL_GL_CreateContext failed: %s", SDL_GetError());
+  }
+
+  SDL_GL_SetSwapInterval(1);
+  glDisable(GL_DEPTH_TEST);
+  glDisable(GL_CULL_FACE);
+  glDisable(GL_LIGHTING);// PSP defaults this on?
+  glShadeModel(GL_SMOOTH); // Fixes color on PSP?
+  glEnable(GL_BLEND);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+  glEnableClientState(GL_COLOR_ARRAY);// To confirm: every frame on PSP?
+  glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+  glEnableClientState(GL_VERTEX_ARRAY);
+
+  spriteBatchInit();
+  renderBackBufferInit();
+  renderSceneInit();
+  renderUIInit();
+
+  RENDER_RUNNING = true;
+  errorOk();
+}
+
+errorret_t renderDraw(void) {
+  SDL_Event event;
+  while(SDL_PollEvent(&event)) {
+    switch(event.type) {
+      case SDL_QUIT:
+        RENDER_RUNNING = false;
+        break;
+
+      default:
+        break;
+    } 
+  }
+
+  // Reset the state
+  spriteBatchClear();
+  renderBackBufferBind();
+
+  renderSceneDraw();
+  renderUIDraw();
+
+  // Finish rendering, now render back buffer.
+  renderBackBufferUnbind();
+  renderBackBufferDraw();
+  textureBind(NULL);
+
+  SDL_GL_SwapWindow(RENDER_WINDOW);
+  errorOk();
+}
+
+errorret_t renderDispose(void) {
+  renderUIDispose();
+  renderSceneDispose();
+  renderBackBufferDispose();
+  spriteBatchDispose();
+
+  // Destroy OpenGL context
+  SDL_GL_DeleteContext(RENDER_GL_CONTEXT);
+  SDL_DestroyWindow(RENDER_WINDOW);
+  SDL_Quit();
+
+  errorOk();
+}