void DarkenTexture(LPDIRECT3DTEXTURE8 *pSourceTexture, LPDIRECT3DTEXTURE8 *pDestTexture, int textureSize, int value)
{
if(textureSize<0) return;
if(!pSourceTexture) return;
if(!pDestTexture) return;
BYTE *pSourceData = new BYTE[textureSize*textureSize];
//read data from source texture
D3DLOCKED_RECT d3dlr;
(*pSourceTexture)->LockRect(0, &d3dlr,0, D3DLOCK_READONLY);
BYTE *pSourceBits = (BYTE*)d3dlr.pBits;
int dataIndex=0;
int bitIndex=0;
for(int x=0;x<textureSize;x++)
{
for(int y=0;y<textureSize;y++)
pSourceData[dataIndex++] = pSourceBits[bitIndex++];
bitIndex += d3dlr.Pitch - (textureSize);
}
(*pSourceTexture)->UnlockRect(0);
//read data from source texture
(*pDestTexture)->LockRect(0, &d3dlr,0, 0);
BYTE *pDestBits = (BYTE*)d3dlr.pBits;
dataIndex=0;
bitIndex=0;
for(x=0;x<textureSize;x++)
{
for(int y=0;y<textureSize;y++)
{
if(pSourceData[dataIndex++] - value > 0)
pDestBits[bitIndex++] = pSourceData[dataIndex++] - value;
else
pDestBits[bitIndex++] = 0;
}
bitIndex += d3dlr.Pitch - (textureSize);
}
(*pDestTexture)->UnlockRect(0);
}
Updating a texture
Author
I''ve got a source texture that is created as a rendertarget and drawn to. I later would like to copy the data from this texture, darken it, and set its value to a new texture. I''m getting an access violation when I try to read the texture. Since this texture is required to be a rendertarget and not dynamic, I''m not sure how to handle. Here''s my source for updating the texture. Can anyone help?
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
