forked from Mirrors/openclonk
50 lines
1.8 KiB
GLSL
50 lines
1.8 KiB
GLSL
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#define HAVE_2PX
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slice(texture+5)
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{
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// find scaler coordinate
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vec2 scalerCoo = scalerOffset + mod(pixelCoo, vec2(1.0, 1.0)) * scalerPixel;
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#ifdef SCALER_IN_GPU
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if(texture2D(landscapeTex[0], centerCoo - fullStepX - fullStepY).r == landscapePx.r)
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scalerCoo += scalerStepX;
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if(texture2D(landscapeTex[0], centerCoo - fullStepY).r == landscapePx.r)
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scalerCoo += 2.0 * scalerStepX;
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if(texture2D(landscapeTex[0], centerCoo + fullStepX - fullStepY).r == landscapePx.r)
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scalerCoo += 4.0 * scalerStepX;
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if(texture2D(landscapeTex[0], centerCoo - fullStepX ).r == landscapePx.r)
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scalerCoo += scalerStepY;
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if(texture2D(landscapeTex[0], centerCoo + fullStepX ).r == landscapePx.r)
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scalerCoo += 2.0 * scalerStepY;
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if(texture2D(landscapeTex[0], centerCoo - fullStepX + fullStepY).r == landscapePx.r)
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scalerCoo += 4.0 * scalerStepY;
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if(texture2D(landscapeTex[0], centerCoo + fullStepY).r == landscapePx.r)
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scalerCoo += 8.0 * scalerStepY;
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if(texture2D(landscapeTex[0], centerCoo + fullStepX + fullStepY).r == landscapePx.r)
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scalerCoo += 16.0 * scalerStepY;
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#else
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int iScaler = f2i(landscapePx.a), iRow = iScaler / 8;
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scalerCoo.x += float(iScaler - iRow * 8) / 8.0;
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scalerCoo.y += float(iScaler / 8) / 32.0;
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#endif
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// Note: scalerCoo will jump around a lot, causing some GPUs to
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// apparantly get confused with the level-of-detail
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// calculation. We therefore try to disable LOD.
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vec4 scalerPx = texture2DLod(scalerTex, scalerCoo, 0.0);
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// gen3 other coordinate calculation. Still struggles a bit with 3-ways
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vec2 centerCoo2 = centerCoo + fullStep * floor(vec2(-0.5, -0.5) +
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scalerPx.gb * 255.0 / 64.0);
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vec4 landscapePx2 = texture2D(landscapeTex[0], centerCoo2);
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}
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slice(color+10) {
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// Mix second color into main color according to scaler
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color = mix(color2, color, scalerPx.r);
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}
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