SDL库自适应窗口大小及遇到的坑

一、窗口尺寸改变大小时，视频卡住不动

网上介绍的方法有：

1：修改源码中的代码！
SDL_OnWindowResized中的SDL_WINDOWEVENT_SIZE_CHANGED更改为SDL_WINDOWEVENT_RESIZED
2：SDL_EventState(SDL_WINDOWEVENT, SDL_IGNORE);

我都试过了，确实可以实现，但是牺牲了分辨率，视频边的模糊

我总结了方法，既然不信那就重新创建SDL_Window、SDL_Renderer、SDL_Texture呗，再利用事件即可解决

void SDLRender::_HandleEventProc()
{std::string str = "1";while (true){SDL_Event event;if (SDL_PollEvent(&event)){switch (event.type){case SDL_WINDOWEVENT:switch (event.window.event){case SDL_WINDOWEVENT_RESIZED:case SDL_WINDOWEVENT_SIZE_CHANGED:m_nScaleWidth = event.window.data1;m_nScaleHeight = event.window.data2;if (m_SdlWindow){SDL_DestroyWindow(m_SdlWindow);m_SdlWindow = nullptr;}if (m_SdlTexture){SDL_DestroyTexture(m_SdlTexture);m_SdlTexture = nullptr;}if (m_SdlRender){SDL_DestroyRenderer(m_SdlRender);m_SdlRender = nullptr;}if (!m_SdlWindow)m_SdlWindow = SDL_CreateWindowFrom(m_hwnd);if (!m_SdlRender)m_SdlRender = SDL_CreateRenderer(m_SdlWindow, -1, SDL_RendererFlags::SDL_RENDERER_ACCELERATED);break;default:break;}break;default:break;}}}
}

只要检测到窗口尺寸变化就重新创建。

二、播放不同分辨率视频会崩溃

解决办法：检测到不用分辨率的帧重新创建SDL_CreateTexture

		if (m_SdlTexture){SDL_DestroyTexture(m_SdlTexture);m_SdlTexture = nullptr;}m_SdlTexture = SDL_CreateTexture(m_SdlRender, GetSDLFormat((AVPixelFormat)frame->format), SDL_TEXTUREACCESS_STREAMING, frame->width, frame->height);

有不足指出还请指教。。。。