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Comparative/inverse blend modes #2

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Comparative/inverse blend modes #2

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bcc8e2a
Comparitive blend modes
Muzzarino Aug 10, 2023
6edde00
Update VFBlendLayers.cpp
Muzzarino Aug 10, 2023
f2a3d93
Adjustment for accurate comparitive maths
Muzzarino Aug 11, 2023
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27 changes: 26 additions & 1 deletion src/VDFilters/source/VFBlendLayers.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,9 @@ namespace {
L"Pin Light",
L"Hard Mix",
L"Difference",
L"Exclusion"
L"Exclusion",
L"Subtract",
L"Divide
};
}

Expand All @@ -73,6 +75,8 @@ struct VDVFBlendLayersConfig {
kMode_HardMix,
kMode_Difference,
kMode_Exclusion,
kMode_Subtract,
kMode_Divide,
kModeCount
};

Expand Down Expand Up @@ -396,6 +400,17 @@ void VDVFBlendLayers::Run() {
case VDVFBlendLayersConfig::kMode_Exclusion:
VDDSPProcessPlane3(dstp, dstpitch, srcp1, src1pitch, srcp2, src2pitch, w16, h, VDDSPBlend8_Exclusion);
break;

case VDVFBlendLayersConfig::kMode_Subtract:
if (sse2)
VDDSPProcessPlane3(dstp, dstpitch, srcp1, src1pitch, srcp2, src2pitch, w16, h, VDDSPBlend8_Subtract_SSE2);
else
VDDSPProcessPlane3(dstp, dstpitch, srcp1, src1pitch, srcp2, src2pitch, w16, h, VDDSPBlend8_Subtract);
break;

case VDVFBlendLayersConfig::kMode_Divide:
VDDSPProcessPlane3(dstp, dstpitch, srcp1, src1pitch, srcp2, src2pitch, w16, h, VDDSPBlend8_Divide);
break;
}

if (factor8 != 255)
Expand Down Expand Up @@ -497,6 +512,16 @@ void VDVFBlendLayers::StartAccel(IVDXAContext *vdxa) {
bytecode = kVDVFBlendLayersFP_Exclusion;
bclen = sizeof kVDVFBlendLayersFP_Exclusion;
break;

case VDVFBlendLayersConfig::kMode_Subtract:
bytecode = kVDVFBlendLayersFP_Subtract;
bclen = sizeof kVDVFBlendLayersFP_Subtract;
break;

case VDVFBlendLayersConfig::kMode_Divide:
bytecode = kVDVFBlendLayersFP_Divide;
bclen = sizeof kVDVFBlendLayersFP_Divide;
break;
}

mVDXAShader = vdxa->CreateFragmentProgram(kVDXAPF_D3D9ByteCodePS20, bytecode, bclen);
Expand Down
32 changes: 32 additions & 0 deletions src/VDFilters/source/VFBlendLayers.vdshaders
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Original file line number Diff line number Diff line change
Expand Up @@ -294,3 +294,35 @@ kVDVFBlendLayersFP_Exclusion::

return c0 + (c1 - 2.0h*c0*c1) * (half)opacity;
}

kVDVFBlendLayersFP_Subtract::
extern sampler2D src0 : register(s0);
extern sampler2D src1 : register(s1);
extern float opacity : register(c0);

half4 main(
float4 uv0 : TEXCOORD0,
float4 uv1 : TEXCOORD1
) : COLOR0
{
half4 c0 = tex2D(src0, uv0.xy);
half4 c1 = tex2D(src1, uv1.xy);

return max(0.0h, c0 - c1) * (half)opacity;
}

kVDVFBlendLayersFP_Divide::
extern sampler2D src0 : register(s0);
extern sampler2D src1 : register(s1);
extern float opacity : register(c0);

half4 main(
float4 uv0 : TEXCOORD0,
float4 uv1 : TEXCOORD1
) : COLOR0
{
half4 c0 = tex2D(src0, uv0.xy);
half4 c1 = tex2D(src1, uv1.xy);

return lerp(c0, min(1.0h, c0 / c1), (half)opacity);
}