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-rw-r--r--hlsl/downsample.fx7
1 files changed, 4 insertions, 3 deletions
diff --git a/hlsl/downsample.fx b/hlsl/downsample.fx
index 18eaa8313c0..376e4b8802d 100644
--- a/hlsl/downsample.fx
+++ b/hlsl/downsample.fx
@@ -60,13 +60,14 @@ VS_OUTPUT vs_main(VS_INPUT Input)
Output.Position = float4(Input.Position.xyz, 1.0f);
Output.Position.xy /= ScreenDims;
- Output.Position.y = 1.0f - Output.Position.y;
- Output.Position.xy -= 0.5f;
- Output.Position.xy *= 2.0f;
+ Output.Position.y = 1.0f - Output.Position.y; // flip y
+ Output.Position.xy -= 0.5f; // center
+ Output.Position.xy *= 2.0f; // zoom
Output.Color = Input.Color;
float2 TexCoord = Input.Position.xy / ScreenDims;
+
Output.TexCoord01.xy = TexCoord + float2(-0.5f, -0.5f) * TargetTexelSize * Prescale;
Output.TexCoord01.zw = TexCoord + float2( 0.5f, -0.5f) * TargetTexelSize * Prescale;
Output.TexCoord23.xy = TexCoord + float2(-0.5f, 0.5f) * TargetTexelSize * Prescale;