将游戏层和UI层分开渲染 并提高了缩放质量

source/EngineFrame/Render/RenderManager.cpp

@@ -26,8 +26,11 @@ RenderManager::RenderManager(SDL_Window *window)
     // 设置窗口尺寸
     _windowWidth = width;
     _windowHeight = height;
-    // 设置正交投影矩阵
-    _orthoMatrix = glm::ortho(0.0f, (float)width, (float)height, 0.0f, -1.0f, 1.0f);
+
+    // 游戏的初始正交投影矩阵
+    _GameOrthoMatrix = glm::ortho(0.0f, (float)width / 1.2f, (float)height / 1.2f, 0.0f, -1.0f, 1.0f);
+    // UI的初始正交投影矩阵
+    _UIOrthoMatrix = glm::ortho(0.0f, (float)width, (float)height, 0.0f, -1.0f, 1.0f);
 
     // 设置清屏颜色
     glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
@@ -217,7 +220,7 @@ void RenderManager::Init2DTextureProgram()
 
         // 设置着色器 uniforms
         glUniformMatrix4fv(_currentRenderParams.UnimLocs[0], 1, GL_FALSE, glm::value_ptr(model));
-        glUniformMatrix4fv(_currentRenderParams.UnimLocs[1], 1, GL_FALSE, glm::value_ptr(_orthoMatrix));
+        glUniformMatrix4fv(_currentRenderParams.UnimLocs[1], 1, GL_FALSE, glm::value_ptr(_OrthoMatrix));
 
         // 绑定纹理并设置采样器
         glActiveTexture(GL_TEXTURE0);
@@ -297,6 +300,7 @@ void RenderManager::SetCurrentBufferObject(std::string name)
 void RenderManager::ClearScreen()
 {
     glClear(GL_COLOR_BUFFER_BIT);
+    _frameRenderCount = 0;
 }
 
 void RenderManager::SwapBuffer()
@@ -317,12 +321,21 @@ void RenderManager::CloseClipRect()
 
 void RenderManager::DrawTexture(RefPtr<Texture> textureObj, const SDL_Rect *srcrect, const SDL_FRect *dstrect, const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip, void *userdata)
 {
+    _frameRenderCount++;
     if (_currentRenderParams.DrawFunc != nullptr)
         _currentRenderParams.DrawFunc(textureObj, srcrect, dstrect, angle, center, flip, userdata);
     else
         SDL_LogError(SDL_LOG_CATEGORY_ERROR, "找不到渲染逻辑函数\n");
 }
 
+void RenderManager::SetOrthoMatrixType(int type)
+{
+    if (type == 0)
+        _OrthoMatrix = _GameOrthoMatrix;
+    else
+        _OrthoMatrix = _UIOrthoMatrix;
+}
+
 GLuint RenderManager::CompileShader(GLenum type, std::string Path)
 {
     std::ifstream Source("shader/" + Path);