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Generate more accurate viewport values, so we can reverse transforms in the vertex shader more generally

This commit is contained in:
Anthony Miles 2019-12-12 22:58:01 +13:00 committed by patrickvl
parent 5d2ef854fb
commit 619b276d81
1 changed files with 50 additions and 8 deletions
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56
src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
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@ -3806,15 +3806,57 @@ void GetViewPortOffsetAndScale(float (&vOffset)[4], float(&vScale)[4])
float scaleZ = zScale * (ViewPort.MaxZ - ViewPort.MinZ);
float offsetZ = zScale * ViewPort.MinZ;
vOffset[0] = offsetWidth + ViewPort.X;
vOffset[1] = offsetHeight + ViewPort.Y;
vOffset[2] = offsetZ;
// TODO will we need to do something here to support upscaling?
// TODO remove the code above as required
// Default scale and offset.
// Multisample state will affect these
float xScale = 1;
float yScale = 1;
float xOffset = 0.5;
float yOffset = 0.5;
// MULTISAMPLE options have offset of 0
// Various sample sizes have various x and y scales
switch (g_EmuCDPD.XboxPresentationParameters.MultiSampleType)
{
case XTL::X_D3DMULTISAMPLE_2_SAMPLES_MULTISAMPLE_LINEAR:
case XTL::X_D3DMULTISAMPLE_2_SAMPLES_MULTISAMPLE_QUINCUNX:
case XTL::X_D3DMULTISAMPLE_4_SAMPLES_MULTISAMPLE_LINEAR:
case XTL::X_D3DMULTISAMPLE_4_SAMPLES_MULTISAMPLE_GAUSSIAN:
xOffset = yOffset = 0;
break;
case XTL::X_D3DMULTISAMPLE_2_SAMPLES_SUPERSAMPLE_HORIZONTAL_LINEAR:
xScale = 2;
break;
case XTL::X_D3DMULTISAMPLE_2_SAMPLES_SUPERSAMPLE_VERTICAL_LINEAR:
yScale = 2;
break;
case XTL::X_D3DMULTISAMPLE_4_SAMPLES_SUPERSAMPLE_LINEAR:
case XTL::X_D3DMULTISAMPLE_4_SAMPLES_SUPERSAMPLE_GAUSSIAN:
xScale = yScale = 2;
break;
case XTL::X_D3DMULTISAMPLE_9_SAMPLES_MULTISAMPLE_GAUSSIAN:
xScale = yScale = 1.5f;
xOffset = yOffset = 0;
break;
case XTL::X_D3DMULTISAMPLE_9_SAMPLES_SUPERSAMPLE_GAUSSIAN:
xScale = yScale = 3.0f;
break;
}
// Offset with OGL pixel correction (?) TODO verify
vOffset[0] = xOffset + (2.0f / ViewPort.Width);
vOffset[1] = yOffset + (2.0f / ViewPort.Height);
vOffset[2] = 0; //offsetZ;
vOffset[3] = 0.0f;
vScale[0] = scaleWidth;
vScale[1] = scaleHeight;
vScale[2] = scaleZ;
vScale[3] = 0.0f;
// Scale
vScale[0] = xScale * ViewPort.Width;
vScale[1] = yScale * ViewPort.Height;
vScale[2] = scaleZ; // ?
vScale[3] = 1.0f; // ?
}
void UpdateViewPortOffsetAndScaleConstants()