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Use premultiplied alpha for plDynamicTextMaps on GUI controls.

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This fixes the irregular dark fringes around light text when not exactly pixel-aligned that are caused by independent interpolation of color and alpha. It also makes calculations simpler for things to come.
This commit is contained in:
Christian Walther
2011-12-30 15:10:47 +01:00
committed by Anne Marije v/d Meer
parent b34577103e
commit 8c5286400a
10 changed files with 144 additions and 21 deletions
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18
Sources/Plasma/PubUtilLib/plPipeline/DX/plDXPipeline.cpp
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@ -7211,12 +7211,26 @@ void plDXPipeline::IHandleFirstStageBlend()
fD3DDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE );
if( fLayerState[0].fBlendFlags & hsGMatState::kBlendInvertFinalAlpha )
{
fD3DDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_INVSRCALPHA );
if( fLayerState[0].fBlendFlags & hsGMatState::kBlendAlphaPremultiplied )
{
fD3DDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_ONE );
}
else
{
fD3DDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_INVSRCALPHA );
}
fD3DDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_SRCALPHA );
}
else
{
fD3DDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
if( fLayerState[0].fBlendFlags & hsGMatState::kBlendAlphaPremultiplied )
{
fD3DDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_ONE );
}
else
{
fD3DDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
}
fD3DDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA );
}
break;