Direct3D how to obtain the background on the surface of the cache data and copied to the memory-CodePudding

A piece of code on the first

 
//do not use the swap chain: 
IDirect3DSurface9 * pBackBuffer; 
//the cache after surface 
M_pd3dDevice - & gt; GetBackBuffer (0, 0, D3DBACKBUFFER_TYPE_MONO, & amp; PBackBuffer); 

//will be saved as a file cache surface after (D3DXIFF_ * to save the image format, BMP, JPG, tga, PNG, DDS, etc.) 
D3DXSaveSurfaceToFile (TEXT (" C: \ \ temp. JPG "), D3DXIFF_JPG, pBackBuffer, NULL, NULL); 

PBackBuffer - & gt; Release ();

This code was to preserve the background cache surface for a picture, but now I need to save the background on the surface of the cache data to save memory in the form of BYTE (the BYTE data should be a dot matrix diagram), to the other methods to deal with the data. I don't know how to operate, which a man knows how to handle, also please teach next thanked the first,

CodePudding user response:

The RECT the RECT.
//set the width
D3DLOCKED_RECT lockedRect;
PBackBuffer - & gt; LockRect (& amp; LockedRect, & amp; The rect, 0);
XXXX (*) lockedRect. PBits;//the actual data, the specific format and the format
//https://msdn.microsoft.com/en-us/library/bb172570 (v=versus 85). Aspx
PBackBuffer - & gt; UnlockRect ();

CodePudding user response:

BackBuffer cannot be read directly, you need to create a BackBuffer and other large Pool for Managed Texture, then the content of the BackBuffer CopyRect to Texture, and then to Lock the Texture