10 files changed, 179 insertions, 0 deletions
diff --git a/LibOVR/Src/CAPI/Shaders/DistortionChroma_ps.psh b/LibOVR/Src/CAPI/Shaders/DistortionChroma_ps.psh
new file mode 100644
index 0000000..5c95ade
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/DistortionChroma_ps.psh
@@ -0,0 +1,12 @@
+Texture2D Texture : register(t0);
+SamplerState Linear : register(s0);
+
+float4 main(in float4 oPosition : SV_Position, in float4 oColor : COLOR,
+            in float3 oTexCoord0 : TEXCOORD0, in float3 oTexCoord1 : TEXCOORD1, in float3 oTexCoord2 : TEXCOORD2) : SV_Target
+{
+	float ResultR = Texture.Sample(Linear, oTexCoord0.xy).r;
+	float ResultG = Texture.Sample(Linear, oTexCoord1.xy).g;
+	float ResultB = Texture.Sample(Linear, oTexCoord2.xy).b;
+	return float4(ResultR * oColor.r, ResultG * oColor.g, ResultB * oColor.b, 1.0);
+	//"	return oColor.rrrr;
+}
diff --git a/LibOVR/Src/CAPI/Shaders/DistortionChroma_vs.vsh b/LibOVR/Src/CAPI/Shaders/DistortionChroma_vs.vsh
new file mode 100644
index 0000000..6e11647
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/DistortionChroma_vs.vsh
@@ -0,0 +1,24 @@
+float2   EyeToSourceUVScale;
+float2   EyeToSourceUVOffset;
+
+void main(in float2 Position    : POSITION,    in float4 Color       : COLOR0,
+          in float2 TexCoord0   : TEXCOORD0,   in float2 TexCoord1   : TEXCOORD1, in float2 TexCoord2 : TEXCOORD2,
+          out float4 oPosition  : SV_Position, out float4 oColor     : COLOR,     out float3 oTexCoord0 : TEXCOORD0,
+          out float3 oTexCoord1 : TEXCOORD1,   out float3 oTexCoord2 : TEXCOORD2)
+{
+   oPosition.x = Position.x;
+   oPosition.y = Position.y;
+   oPosition.z = 0.5;
+   oPosition.w = 1.0;
+
+   // Scale them into  UV lookup space
+   float2 tc0scaled = EyeToSourceUVScale * TexCoord0 + EyeToSourceUVOffset;
+   float2 tc1scaled = EyeToSourceUVScale * TexCoord1 + EyeToSourceUVOffset;
+   float2 tc2scaled = EyeToSourceUVScale * TexCoord2 + EyeToSourceUVOffset;
+
+   oTexCoord0  = float3(tc0scaled, 1);      // R sample.
+   oTexCoord1  = float3(tc1scaled, 1);      // G sample.
+   oTexCoord2  = float3(tc2scaled, 1);      // B sample.
+   oColor      = Color;                    // Used for vignette fade.
+}
+
diff --git a/LibOVR/Src/CAPI/Shaders/DistortionTimewarpChroma_vs.vsh b/LibOVR/Src/CAPI/Shaders/DistortionTimewarpChroma_vs.vsh
new file mode 100644
index 0000000..d629ddd
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/DistortionTimewarpChroma_vs.vsh
@@ -0,0 +1,40 @@
+float2 EyeToSourceUVScale;
+float2 EyeToSourceUVOffset;
+float4x4 EyeRotationStart;
+float4x4 EyeRotationEnd;
+
+float2 TimewarpTexCoordToWarpedPos(float2 inTexCoord, float4x4 rotMat)
+{
+	// Vertex inputs are in TanEyeAngle space for the R,G,B channels (i.e. after chromatic aberration and distortion).
+	// These are now "real world" vectors in direction (x,y,1) relative to the eye of the HMD.	
+	// Apply the 3x3 timewarp rotation to these vectors.
+	float3 transformed = float3( mul ( rotMat, float4(inTexCoord.xy, 1, 1) ).xyz);
+	// Project them back onto the Z=1 plane of the rendered images.
+	float2 flattened = transformed.xy / transformed.z;
+	// Scale them into ([0,0.5],[0,1]) or ([0.5,0],[0,1]) UV lookup space (depending on eye)
+	return flattened * EyeToSourceUVScale + EyeToSourceUVOffset;
+	
+}
+
+void main(in float2 Position    : POSITION,    in float4 Color       : COLOR0,    in float2 TexCoord0 : TEXCOORD0,
+          in float2 TexCoord1   : TEXCOORD1,   in float2 TexCoord2   : TEXCOORD2,
+          out float4 oPosition  : SV_Position, out float4 oColor     : COLOR,     out float3 oTexCoord0 : TEXCOORD0,
+          out float3 oTexCoord1 : TEXCOORD1,   out float3 oTexCoord2 : TEXCOORD2)
+{
+
+   oPosition.x = Position.x;
+   oPosition.y = Position.y;
+   oPosition.z = 0.5;
+   oPosition.w = 1.0;
+    	    
+   float timewarpLerpFactor = Color.a;
+   float4x4 lerpedEyeRot = lerp(EyeRotationStart, EyeRotationEnd, timewarpLerpFactor);	
+	//"	float4x4 lerpedEyeRot = EyeRotationStart;
+
+		// warped positions are a bit more involved, hence a separate function
+	oTexCoord0 = float3(TimewarpTexCoordToWarpedPos(TexCoord0, lerpedEyeRot), 1);
+	oTexCoord1 = float3(TimewarpTexCoordToWarpedPos(TexCoord1, lerpedEyeRot), 1);
+	oTexCoord2 = float3(TimewarpTexCoordToWarpedPos(TexCoord2, lerpedEyeRot), 1);
+
+   oColor = Color.r;              // Used for vignette fade.
+}
diff --git a/LibOVR/Src/CAPI/Shaders/DistortionTimewarp_vs.vsh b/LibOVR/Src/CAPI/Shaders/DistortionTimewarp_vs.vsh
new file mode 100644
index 0000000..627970f
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/DistortionTimewarp_vs.vsh
@@ -0,0 +1,36 @@
+float2   EyeToSourceUVScale;
+float2   EyeToSourceUVOffset;
+float4x4 EyeRotationStart;
+float4x4 EyeRotationEnd;
+
+float2 TimewarpTexCoordToWarpedPos(float2 inTexCoord, float4x4 rotMat)
+{
+    // Vertex inputs are in TanEyeAngle space for the R,G,B channels (i.e. after chromatic aberration and distortion).
+    // These are now "real world" vectors in direction (x,y,1) relative to the eye of the HMD.    
+    // Apply the 3x3 timewarp rotation to these vectors.
+	float3 transformed = float3( mul ( rotMat, float4(inTexCoord,1,1) ).xyz);
+    // Project them back onto the Z=1 plane of the rendered images.
+	float2 flattened = transformed.xy / transformed.z;
+    // Scale them into ([0,0.5],[0,1]) or ([0.5,0],[0,1]) UV lookup space (depending on eye)
+	return flattened * EyeToSourceUVScale + EyeToSourceUVOffset;
+	
+}
+
+void main(in float2 Position    : POSITION,    in float4 Color   : COLOR0,  in float2 TexCoord0   : TEXCOORD0,    
+          out float4 oPosition  : SV_Position, out float4 oColor : COLOR,   out float3 oTexCoord0 : TEXCOORD0)    
+{
+
+   oPosition.x = Position.x;
+   oPosition.y = Position.y;
+   oPosition.z = 0.5;
+   oPosition.w = 1.0;
+
+   float timewarpLerpFactor = Color.a;
+   float4x4 lerpedEyeRot = lerp(EyeRotationStart, EyeRotationEnd, timewarpLerpFactor);	
+
+    // Warped positions are a bit more involved, hence a separate function
+	oTexCoord0 = float3(TimewarpTexCoordToWarpedPos(TexCoord0, lerpedEyeRot), 1);
+   oColor = Color.r;              // Used for vignette fade.
+}
+
+
diff --git a/LibOVR/Src/CAPI/Shaders/Distortion_ps.psh b/LibOVR/Src/CAPI/Shaders/Distortion_ps.psh
new file mode 100644
index 0000000..4a33de5
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/Distortion_ps.psh
@@ -0,0 +1,9 @@
+Texture2D    Texture : register(t0);
+SamplerState Linear  : register(s0);
+
+float4 main(in float4 oPosition  : SV_Position, in float4 oColor : COLOR,
+            in float3 oTexCoord0 : TEXCOORD0) : SV_Target
+{
+	float3 Result = Texture.Sample(Linear, oTexCoord0.xy).rgb;
+	return float4(Result.r * oColor.r, Result.g * oColor.g, Result.b * oColor.b, 1.0);
+}
diff --git a/LibOVR/Src/CAPI/Shaders/Distortion_vs.vsh b/LibOVR/Src/CAPI/Shaders/Distortion_vs.vsh
new file mode 100644
index 0000000..d22ea02
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/Distortion_vs.vsh
@@ -0,0 +1,14 @@
+float2   EyeToSourceUVScale;
+float2   EyeToSourceUVOffset;
+
+void main(in float2 Position   : POSITION,    in float4 Color : COLOR0,  in float2 TexCoord0 : TEXCOORD0,
+          out float4 oPosition : SV_Position, out float4 oColor : COLOR, out float3 oTexCoord0 : TEXCOORD0)
+{
+   oPosition.x = Position.x;
+   oPosition.y = Position.y;
+   oPosition.z = 0.5;
+   oPosition.w = 1.0;   
+   oTexCoord0  = float3(EyeToSourceUVScale * TexCoord0 + EyeToSourceUVOffset, 1);
+   oColor      = Color; // Used for vignette fade.
+}
+
diff --git a/LibOVR/Src/CAPI/Shaders/SimpleQuad_ps.psh b/LibOVR/Src/CAPI/Shaders/SimpleQuad_ps.psh
new file mode 100644
index 0000000..9ea10cd
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/SimpleQuad_ps.psh
@@ -0,0 +1,6 @@
+float4 Color;
+
+float4 main() : SV_Target
+{
+   return Color;
+}
diff --git a/LibOVR/Src/CAPI/Shaders/SimpleQuad_vs.vsh b/LibOVR/Src/CAPI/Shaders/SimpleQuad_vs.vsh
new file mode 100644
index 0000000..4625371
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/SimpleQuad_vs.vsh
@@ -0,0 +1,8 @@
+float2 PositionOffset = float2(0, 0);
+float2 Scale = float2(1, 1);
+
+void main(	in  float3 Position		: POSITION,
+out float4 oPosition	: SV_Position)
+{
+	oPosition = float4(Position.xy * Scale + PositionOffset, 0.5, 1.0);
+}
+\ No newline at end of file
diff --git a/LibOVR/Src/CAPI/Shaders/genPixelShaderHeader.bat b/LibOVR/Src/CAPI/Shaders/genPixelShaderHeader.bat
new file mode 100644
index 0000000..a1311b2
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/genPixelShaderHeader.bat
@@ -0,0 +1,15 @@
+@echo off
+pushd %~dp0
+echo Compiling shader and packing into header: %~2
+setlocal
+
+set PATH=%PATH%;"%DXSDK_DIR%Utilities\bin\x86\"
+fxc.exe  /nologo /E main /T ps_4_0 /Fo "%1" %2
+bin2header.exe "%1"
+
+echo Generating shader reflection data for %1
+ShaderReflector "%1" "%1_refl.h"
+
+del "%1"
+endlocal
+popd
diff --git a/LibOVR/Src/CAPI/Shaders/genVertexShaderHeader.bat b/LibOVR/Src/CAPI/Shaders/genVertexShaderHeader.bat
new file mode 100644
index 0000000..4591d20
--- /dev/null
+++ b/LibOVR/Src/CAPI/Shaders/genVertexShaderHeader.bat
@@ -0,0 +1,15 @@
+@echo off
+pushd %~dp0
+echo Compiling shader and packing into header: %~2
+setlocal
+
+set PATH=%PATH%;"%DXSDK_DIR%Utilities\bin\x86\"
+fxc.exe  /nologo /E main /T vs_4_0 /Fo "%1" %2
+bin2header.exe "%1"
+
+echo Generating shader reflection data for %1
+ShaderReflector "%1" "%1_refl.h"
+
+del "%1"
+endlocal
+popd