void ChangeGamma(byte *pImage, int size, float factor)
{
for(int i = 0; i < size / 3; i++, pImage += 3)
{
float scale = 1.0f, temp = 0.0f;
float r = 0, g = 0, b = 0;
r = (float)pImage[0];
g = (float)pImage[1];
b = (float)pImage[2];
r = r * factor / 255.0f;
g = g * factor / 255.0f;
b = b * factor / 255.0f;
if(r > 1.0f && (temp = (1.0f/r)) < scale) scale=temp;
if(g > 1.0f && (temp = (1.0f/g)) < scale) scale=temp;
if(b > 1.0f && (temp = (1.0f/b)) < scale) scale=temp;
scale*=255.0f;
r*=scale; g*=scale; b*=scale;
pImage[0] = (byte)r;
pImage[1] = (byte)g;
pImage[2] = (byte)b;
}
}
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