Hi everyone,

I've been using a sprite to do post-processing effects for a while now, but I'm having a few issues with it recently. Here is my code for drawing to the screen using post-processing:

bool draw_Processed_Texture(D3DXHANDLE technique, DrawableTex2D screen_texture)
{
if (FAILED(screenSprite->Begin(D3DXSPRITE_DO_NOT_ADDREF_TEXTURE | D3DXSPRITE_SORT_TEXTURE))){return false;}
 
globalEffect->SetValue("i_TextureWidth", &WIDTH, sizeof(unsigned));
globalEffect->SetValue("i_TextureHeight", &HEIGHT, sizeof(unsigned));
 
globalEffect->SetTexture("t_ScreenTexture", screen_texture.drawTexture);
 
globalEffect->SetTechnique(technique);
UINT numPasses = 0;
if (FAILED(globalEffect->Begin(&numPasses, 0))){return false;}
for (UINT i = 0; i < numPasses; i++)
{
if (FAILED(globalEffect->BeginPass(i))){return false;}
screenSprite->Draw(screen_texture.drawTexture, NULL, NULL, NULL, D3DCOLOR_ARGB(255, 255, 255, 255));
if (FAILED(screenSprite->End())){return false;}
if (FAILED(globalEffect->EndPass())){return false;}
}
if (FAILED(globalEffect->End())){return false;}
 
return true;
}

Thanks for the help. It's interesting because I've been using the above for things like gaussian blurs, greyscale rendering, etc... and as far as I can tell it actually works if all I do is apply a pixel shader, but the thing is, I can't remember exactly where I came across this method so I was beginning to question whether it's valid or not!