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comparison engine/core/video/sdl/renderbackendsdl.cpp @ 634:5f381fa34769

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* Added the clearBackBuffer() function to the renderbackends. * Renamed setClearScreen() to setClearBackBuffer() * The SDL render backend now honors what was set with setClearBackBuffer() * Documented testRenderedViewPort() * The OpenGL backend no longer clears the screen every frame by default. testRenderedViewPort() takes care of clearing the screen for now. Note: if the user overrides the default and enables clearing of the backbuffer that it may be cleared twice in one frame (OpenGL only)!
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Wed, 06 Oct 2010 15:49:53 +0000
parents 46b95d06c8c2
children 855ad500f991
comparison
equal deleted inserted replaced
633:46b95d06c8c2 634:5f381fa34769
58 throw SDLException(SDL_GetError()); 58 throw SDLException(SDL_GetError());
59 59
60 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL); // temporary hack 60 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL); // temporary hack
61 } 61 }
62 62
63 void RenderBackendSDL::clearBackBuffer() {
64 SDL_Rect rect;
65 rect.x = 0;
66 rect.y = 0;
67 rect.w = getWidth();
68 rect.h = getHeight();
69 SDL_SetClipRect(m_screen->getSurface(), &rect);
70 SDL_FillRect(m_screen->getSurface(), 0, 0x00);
71 }
72
63 Image* RenderBackendSDL::createMainScreen(unsigned int width, unsigned int height, unsigned char bitsPerPixel, bool fs, const std::string& title, const std::string& icon) { 73 Image* RenderBackendSDL::createMainScreen(unsigned int width, unsigned int height, unsigned char bitsPerPixel, bool fs, const std::string& title, const std::string& icon) {
64 Uint32 flags = 0; 74 Uint32 flags = 0;
65 if (fs) { 75 if (fs) {
66 flags |= SDL_FULLSCREEN; 76 flags |= SDL_FULLSCREEN;
67 } 77 }
118 m_screen = new SDLImage(screen); 128 m_screen = new SDLImage(screen);
119 return m_screen; 129 return m_screen;
120 } 130 }
121 131
122 void RenderBackendSDL::startFrame() { 132 void RenderBackendSDL::startFrame() {
123 SDL_Rect rect; 133 if (m_clear) {
124 rect.x = 0; 134 clearBackBuffer();
125 rect.y = 0; 135 }
126 rect.w = getWidth();
127 rect.h = getHeight();
128 SDL_SetClipRect(m_screen->getSurface(), &rect);
129 SDL_FillRect(m_screen->getSurface(), 0, 0x00);
130 } 136 }
131 137
132 void RenderBackendSDL::endFrame() { 138 void RenderBackendSDL::endFrame() {
133 SDL_Flip(m_screen->getSurface()); 139 SDL_Flip(m_screen->getSurface());
134 } 140 }