diff options
Diffstat (limited to 'hlsl/downsample.fx')
-rw-r--r-- | hlsl/downsample.fx | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/hlsl/downsample.fx b/hlsl/downsample.fx index 376e4b8802d..4a4a8fe3743 100644 --- a/hlsl/downsample.fx +++ b/hlsl/downsample.fx @@ -48,15 +48,15 @@ struct PS_INPUT //----------------------------------------------------------------------------- uniform float2 ScreenDims; -uniform float2 TargetSize; +uniform float2 TargetDims; -uniform float2 Prescale = float2(1.0f, 1.0f); +uniform bool PrepareVector; VS_OUTPUT vs_main(VS_INPUT Input) { VS_OUTPUT Output = (VS_OUTPUT)0; - float2 TargetTexelSize = 1.0f / TargetSize; + float2 TargetTexelDims = 1.0f / TargetDims; Output.Position = float4(Input.Position.xyz, 1.0f); Output.Position.xy /= ScreenDims; @@ -67,11 +67,14 @@ VS_OUTPUT vs_main(VS_INPUT Input) 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; - Output.TexCoord23.zw = TexCoord + float2( 0.5f, 0.5f) * TargetTexelSize * Prescale; + TexCoord += PrepareVector + ? 0.5f / TargetDims // half texel offset correction (DX9) + : 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; return Output; } |