From e378bf51d532c15fa56f7688709e0ceacf4c58bd Mon Sep 17 00:00:00 2001
From: assiduous <assiduous@diligentgraphics.com>
Date: Sun, 24 May 2020 17:46:50 -0700
Subject: Added TexUVToNormalizedDeviceXY convenience shader function

---
 Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions.fxh     | 5 +++++
 Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions_inc.fxh | 5 +++++
 2 files changed, 10 insertions(+)

(limited to 'Graphics/GraphicsEngineD3DBase')

diff --git a/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions.fxh b/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions.fxh
index 44ed3641..3916bb63 100644
--- a/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions.fxh
+++ b/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions.fxh
@@ -12,6 +12,11 @@ float2 NormalizedDeviceXYToTexUV( float2 f2ProjSpaceXY )
     return float2(0.5,0.5) + float2(0.5,-0.5) * f2ProjSpaceXY.xy;
 }
 
+float2 TexUVToNormalizedDeviceXY( float2 TexUV)
+{
+    return (TexUV.xy - float2(0.5, 0.5)) * float2(2.0, -2.0);
+}
+
 float NormalizedDeviceZToDepth(float fNDC_Z)
 {
     return fNDC_Z;
diff --git a/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions_inc.fxh b/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions_inc.fxh
index 72bfc1f8..078e6ae4 100644
--- a/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions_inc.fxh
+++ b/Graphics/GraphicsEngineD3DBase/include/HLSLDefinitions_inc.fxh
@@ -12,6 +12,11 @@
 "    return float2(0.5,0.5) + float2(0.5,-0.5) * f2ProjSpaceXY.xy;\n"
 "}\n"
 "\n"
+"float2 TexUVToNormalizedDeviceXY( float2 TexUV)\n"
+"{\n"
+"    return (TexUV.xy - float2(0.5, 0.5)) * float2(2.0, -2.0);\n"
+"}\n"
+"\n"
 "float NormalizedDeviceZToDepth(float fNDC_Z)\n"
 "{\n"
 "    return fNDC_Z;\n"
-- 
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