diff options
Diffstat (limited to 'hlsl/downsample.fx')
-rw-r--r-- | hlsl/downsample.fx | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/hlsl/downsample.fx b/hlsl/downsample.fx index 6cb18f53935..3afcdc703dd 100644 --- a/hlsl/downsample.fx +++ b/hlsl/downsample.fx @@ -53,9 +53,11 @@ struct PS_INPUT uniform float2 ScreenDims; uniform float2 TargetDims; +uniform float2 SourceDims; uniform float2 SourceRect; +uniform float2 QuadDims; -uniform bool PrepareVector; +uniform bool VectorScreen; static const float2 Coord0Offset = float2(-0.5f, -0.5f); static const float2 Coord1Offset = float2( 0.5f, -0.5f); @@ -67,6 +69,8 @@ VS_OUTPUT vs_main(VS_INPUT Input) VS_OUTPUT Output = (VS_OUTPUT)0; float2 TargetTexelDims = 1.0f / TargetDims; + float2 ScreenTexelDims = 1.0f / ScreenDims; + float2 SourceTexelDims = 1.0f / SourceDims; Output.Position = float4(Input.Position.xyz, 1.0f); Output.Position.xy /= ScreenDims; @@ -79,6 +83,13 @@ VS_OUTPUT vs_main(VS_INPUT Input) float2 TexCoord = Input.Position.xy / ScreenDims; TexCoord += 0.5f / TargetDims; // half texel offset correction (DX9) + float2 VectorTexelOffset = ScreenTexelDims * -0.5; + float2 RasterTexelOffset = SourceTexelDims * (0.5f * SourceRect) * (1.0f - (QuadDims / ScreenDims)); + + TexCoord += VectorScreen + ? VectorTexelOffset + : RasterTexelOffset; + Output.TexCoord01.xy = TexCoord + Coord0Offset * TargetTexelDims; Output.TexCoord01.zw = TexCoord + Coord1Offset * TargetTexelDims; Output.TexCoord23.xy = TexCoord + Coord2Offset * TargetTexelDims; |