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Merge branch 'dashmode-shader' into 'master'

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Add TC_DASHMODE color shader

See merge request STJr/SRB2!526
This commit is contained in:
James R 2019-12-13 01:58:18 -05:00
commit c415d80e19
1 changed files with 33 additions and 0 deletions
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33
src/hardware/hw_md2.c
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@ -729,6 +729,39 @@ static void HWR_CreateBlendedTexture(GLPatch_t *gpatch, GLPatch_t *blendgpatch,
cur++; image++; blendimage++;
}
}
else if (skinnum == TC_DASHMODE)
{
while (size--)
{
if (image->s.alpha == 0 && blendimage->s.alpha == 0)
{
// Don't bother with blending the pixel if the alpha of the blend pixel is 0
cur->rgba = image->rgba;
}
else
{
UINT8 ialpha = 255 - blendimage->s.alpha, balpha = blendimage->s.alpha;
RGBA_t icolor = *image, bcolor;
if (blendimage->s.alpha)
{
bcolor.s.blue = 0;
bcolor.s.red = 255;
bcolor.s.green = (blendimage->s.red + blendimage->s.green + blendimage->s.blue) / 3;
}
if (image->s.alpha && image->s.red > image->s.green << 1) // this is pretty arbitrary, but it works well for Metal Sonic
{
icolor.s.red = image->s.blue;
icolor.s.blue = image->s.red;
}
cur->s.red = (ialpha * icolor.s.red + balpha * bcolor.s.red)/255;
cur->s.green = (ialpha * icolor.s.green + balpha * bcolor.s.green)/255;
cur->s.blue = (ialpha * icolor.s.blue + balpha * bcolor.s.blue)/255;
cur->s.alpha = image->s.alpha;
}
cur++; image++; blendimage++;
}
}
else
{
while (size--)