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Fix scaling behavior when the window size doesn't divide evenly into the pixel scale

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elasota
2020-04-26 01:56:55 -04:00
parent e2127038ef
commit 92c4878492
1 changed files with 8 additions and 4 deletions
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12
GpDisplayDriver_D3D11/GpDisplayDriverD3D11.cpp
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@@ -631,11 +631,15 @@ void GpDisplayDriverD3D11::ScaleVirtualScreen()
const float twoDivWidth = 2.0f / static_cast<float>(m_windowWidthPhysical); const float twoDivWidth = 2.0f / static_cast<float>(m_windowWidthPhysical);
const float negativeTwoDivHeight = -2.0f / static_cast<float>(m_windowHeightPhysical); const float negativeTwoDivHeight = -2.0f / static_cast<float>(m_windowHeightPhysical);
// Use the scaled virtual width instead of the physical width to correctly handle cases where the window boundary is in the middle of a pixel
float fWidth = static_cast<float>(m_windowWidthVirtual) * m_pixelScaleX;
float fHeight = static_cast<float>(m_windowHeightVirtual) * m_pixelScaleY;
DrawQuadVertexConstants vConstantsData; DrawQuadVertexConstants vConstantsData;
vConstantsData.m_ndcOriginX = -1.0f; vConstantsData.m_ndcOriginX = twoDivWidth - 1.0f;
vConstantsData.m_ndcOriginY = 1.0f; vConstantsData.m_ndcOriginY = negativeTwoDivHeight + 1.0f;
vConstantsData.m_ndcWidth = 2.0f; vConstantsData.m_ndcWidth = fWidth * twoDivWidth;
vConstantsData.m_ndcHeight = -2.0f; vConstantsData.m_ndcHeight = fHeight * negativeTwoDivHeight;
vConstantsData.m_surfaceDimensionX = static_cast<float>(m_windowWidthVirtual); vConstantsData.m_surfaceDimensionX = static_cast<float>(m_windowWidthVirtual);
vConstantsData.m_surfaceDimensionY = static_cast<float>(m_windowHeightVirtual); vConstantsData.m_surfaceDimensionY = static_cast<float>(m_windowHeightVirtual);