SDL2源代码分析8：视频显示总结

标签：sdl   opengl   direct3d   gdi   源代码   

SDL显示视频的结构体

SDL_Window：代表了窗口
SDL_Renderer：代表了渲染器
SDL_Texture：代表了纹理
SDL_Rect：一个矩形框，用于确定纹理显示的位置。

PS：该图源自于文章《最简单的基于FFMPEG+SDL的视频播放器 ver2 （采用SDL2.0）》

SDL显示视频的流程

SDL显示视频的流程如下图所示。

SDL-Windows-Direct3D

PS：白色背景函数为SDL的API；蓝色背景的函数为Win32的API；紫色背景的函数Direct3D的API。

更清晰的图片链接（右键保存）：http://my.csdn.net/leixiaohua1020/album/detail/1795753

CreateWindow()
SetWindowText()
ShowWindow()
SetWindowPos()

Direct3DCreate9()
IDirect3D9_GetDeviceCaps()
IDirect3D9_CreateDevice()
IDirect3DDevice9_SetFVF()
IDirect3DDevice9_SetRenderState()
IDirect3DDevice9_SetTextureStageState()
IDirect3DDevice9_SetTransform()
IDirect3DDevice9_CreatePixelShader()

IDirect3DDevice9_CreateTexture()

IDirect3DTexture9_LockRect()
memcpy()：这个不算D3D的，用于拷贝像素数据。
IDirect3DTexture9_UnlockRect()

IDirect3DDevice9_BeginScene()
IDirect3DDevice9_SetRenderState()
IDirect3DDevice9_SetSamplerState()
IDirect3DDevice9_SetTexture()
IDirect3DDevice9_SetPixelShader()
IDirect3DDevice9_DrawPrimitiveUP()

IDirect3DDevice9_EndScene()
IDirect3DDevice9_Present()

SDL-Windows-OpenGL

更清晰的图片链接（右键保存）：http://my.csdn.net/leixiaohua1020/album/detail/1795755

CreateWindow()
SetWindowText()
ShowWindow()
SetWindowPos()

glCreateProgramObject()
glCreateShaderObject()
glShaderSource()
glCompileShader()
GetObjectParameteriv()
AttachObject()
LinkProgram()
UseProgramObject()

glGenTextures()
glBindTexture()
glTexParameteri()
glTexImage2D()

glBindTexture()
glTexSubImage2D()

glActiveTexture()
glBindTexture()

SwapBuffers()

SDL-Windows-Software

 

CreateWindow()
SetWindowText()
ShowWindow()
SetWindowPos()

CreateCompatibleBitmap()
GetDIBits()
CreateCompatibleDC()
CreateDIBSection()
SelectObject()

BitBlt()

SDL2源代码分析8：视频显示总结

标签：sdl   opengl   direct3d   gdi   源代码   

原文地址：http://blog.csdn.net/leixiaohua1020/article/details/41207787