Irrlicht Engine

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//! Creates an boolean alpha channel of the texture based of an color key position.
void CNullDriver::makeColorKeyTexture(video::ITexture* texture,
                    core::position2d<s32> colorKeyPixelPos,
                    bool zeroTexels) const
{/*
    if (!texture)
        return;
 
    if (texture->getColorFormat() != ECF_A1R5G5B5 &&
        texture->getColorFormat() != ECF_A8R8G8B8 )
    {
        os::Printer::log("Error: Unsupported texture color format for making color key channel.", ELL_ERROR);
        return;
    }
 
    SColor colorKey;
 
    if (texture->getColorFormat() == ECF_A1R5G5B5)
    {
        u16 *p = (u16*)texture->lock(ETLM_READ_ONLY);
 
        if (!p)
        {
            os::Printer::log("Could not lock texture for making color key channel.", ELL_ERROR);
            return;
        }
 
        u32 pitch = texture->getPitch() / 2;
 
        const u16 key16Bit = 0x7fff & p[colorKeyPixelPos.Y*pitch + colorKeyPixelPos.X];
 
        colorKey = video::A1R5G5B5toA8R8G8B8(key16Bit);
    }
    else
    {
        u32 *p = (u32*)texture->lock(ETLM_READ_ONLY);
 
        if (!p)
        {
            os::Printer::log("Could not lock texture for making color key channel.", ELL_ERROR);
            return;
        }
 
        u32 pitch = texture->getPitch() / 4;
        colorKey = 0x00ffffff & p[colorKeyPixelPos.Y*pitch + colorKeyPixelPos.X];
    }
 
    texture->unlock();
    makeColorKeyTexture(texture, colorKey, zeroTexels);*/
 
        os::Printer::log("DevSH is amazed that you'd even want to do this.", ELL_ERROR);
        return;
}