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Add subtractive blending mode to backends

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This commit is contained in:
Jack Andersen
2017-09-04 16:59:41 -10:00
parent 18cbfd2865
commit dd6e53119a
6 changed files with 71 additions and 11 deletions
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14
lib/graphicsdev/D3D12.cpp
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@@ -694,8 +694,18 @@ class D3D12ShaderPipeline : public IShaderPipeline
if (dstFac != BlendFactor::Zero)
{
desc.BlendState.RenderTarget[0].BlendEnable = true;
desc.BlendState.RenderTarget[0].SrcBlend = BLEND_FACTOR_TABLE[int(srcFac)];
desc.BlendState.RenderTarget[0].DestBlend = BLEND_FACTOR_TABLE[int(dstFac)];
if (srcFac == BlendFactor::Subtract || dstFac == BlendFactor::Subtract)
{
desc.BlendState.RenderTarget[0].SrcBlend = D3D12_BLEND_DEST_COLOR;
desc.BlendState.RenderTarget[0].DestBlend = D3D12_BLEND_SRC_COLOR;
desc.BlendState.RenderTarget[0].BlendOp = D3D12_BLEND_OP_SUBTRACT;
}
else
{
desc.BlendState.RenderTarget[0].SrcBlend = BLEND_FACTOR_TABLE[int(srcFac)];
desc.BlendState.RenderTarget[0].DestBlend = BLEND_FACTOR_TABLE[int(dstFac)];
desc.BlendState.RenderTarget[0].BlendOp = D3D12_BLEND_OP_ADD;
}
desc.BlendState.RenderTarget[0].SrcBlendAlpha = D3D12_BLEND_ONE;
desc.BlendState.RenderTarget[0].DestBlendAlpha = D3D12_BLEND_ZERO;
}