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-rw-r--r--hlsl/downsample.fx19
1 files changed, 11 insertions, 8 deletions
diff --git a/hlsl/downsample.fx b/hlsl/downsample.fx
index 122172350f9..6cb18f53935 100644
--- a/hlsl/downsample.fx
+++ b/hlsl/downsample.fx
@@ -57,6 +57,11 @@ uniform float2 SourceRect;
uniform bool PrepareVector;
+static const float2 Coord0Offset = float2(-0.5f, -0.5f);
+static const float2 Coord1Offset = float2( 0.5f, -0.5f);
+static const float2 Coord2Offset = float2(-0.5f, 0.5f);
+static const float2 Coord3Offset = float2( 0.5f, 0.5f);
+
VS_OUTPUT vs_main(VS_INPUT Input)
{
VS_OUTPUT Output = (VS_OUTPUT)0;
@@ -72,14 +77,12 @@ VS_OUTPUT vs_main(VS_INPUT Input)
Output.Color = Input.Color;
float2 TexCoord = Input.Position.xy / ScreenDims;
- TexCoord += PrepareVector
- ? 0.5f / TargetDims // half texel offset correction (DX9) - only for vector grpahics
- : 0.0f;
-
- Output.TexCoord01.xy = TexCoord + float2(-0.5f, -0.5f) * TargetTexelDims;
- Output.TexCoord01.zw = TexCoord + float2( 0.5f, -0.5f) * TargetTexelDims;
- Output.TexCoord23.xy = TexCoord + float2(-0.5f, 0.5f) * TargetTexelDims;
- Output.TexCoord23.zw = TexCoord + float2( 0.5f, 0.5f) * TargetTexelDims;
+ TexCoord += 0.5f / TargetDims; // half texel offset correction (DX9)
+
+ Output.TexCoord01.xy = TexCoord + Coord0Offset * TargetTexelDims;
+ Output.TexCoord01.zw = TexCoord + Coord1Offset * TargetTexelDims;
+ Output.TexCoord23.xy = TexCoord + Coord2Offset * TargetTexelDims;
+ Output.TexCoord23.zw = TexCoord + Coord3Offset * TargetTexelDims;
return Output;
}