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Fixed chroma subsampling in color_heavy.fx and color.fx, nw

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This commit is contained in:
Ryan Holtz 2011-05-18 02:17:31 +00:00
parent 8805896738
commit df5254338f
2 changed files with 28 additions and 30 deletions
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29
hlsl/color.fx
View File

@ -129,26 +129,25 @@ uniform float QSubsampleLength = 3.0f;
float4 ps_main(PS_INPUT Input) : COLOR
{
// -- Bandwidth Subsampling --
float YSubsampleWidth = (RawWidth * 2.0f) / YSubsampleLength;
float ISubsampleWidth = (RawWidth * 2.0f) / ISubsampleLength;
float QSubsampleWidth = (RawWidth * 2.0f) / QSubsampleLength;
float3 SubsampleWidth = float3(YSubsampleWidth, ISubsampleWidth, QSubsampleWidth);
float3 SubsampleFrac = frac(Input.TexCoord.x * SubsampleWidth);
float3 SubsampleCoord = (Input.TexCoord.x * SubsampleWidth - SubsampleFrac) / SubsampleWidth + SubsampleFrac / (SubsampleWidth * 2.0f);
float3 SubsampleWidth = float3(YSubsampleLength, ISubsampleLength, QSubsampleLength);
SubsampleWidth = (RawWidth * 2.0f) / SubsampleWidth;
float3 SubsampleCoord = Input.TexCoord.x;
float3 SubsampleFrac = frac(SubsampleCoord * SubsampleWidth); // Fraction is in subsample width units!
SubsampleCoord = (SubsampleCoord * SubsampleWidth - SubsampleFrac) / SubsampleWidth;
float4 BaseTexel = tex2D(DiffuseSampler, Input.TexCoord);
float3 YTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.x, Input.TexCoord.y)).rgb;
float3 ITexel = tex2D(DiffuseSampler, float2(SubsampleCoord.y, Input.TexCoord.y)).rgb;
float3 QTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.z, Input.TexCoord.y)).rgb;
float3 LastYTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.x - SubsampleFrac.x / RawWidth, Input.TexCoord.y)).rgb;
float3 LastITexel = tex2D(DiffuseSampler, float2(SubsampleCoord.y - SubsampleFrac.y / RawWidth, Input.TexCoord.y)).rgb;
float3 LastQTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.z - SubsampleFrac.z / RawWidth, Input.TexCoord.y)).rgb;
float3 LastYTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.x + YSubsampleLength / (RawWidth * 2.0f), Input.TexCoord.y)).rgb;
float3 LastITexel = tex2D(DiffuseSampler, float2(SubsampleCoord.y + ISubsampleLength / (RawWidth * 2.0f), Input.TexCoord.y)).rgb;
float3 LastQTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.z + QSubsampleLength / (RawWidth * 2.0f), Input.TexCoord.y)).rgb;
YTexel = lerp(LastYTexel, YTexel, SubsampleFrac.x);
ITexel = lerp(LastITexel, ITexel, SubsampleFrac.y);
QTexel = lerp(LastQTexel, QTexel, SubsampleFrac.z);
YTexel = lerp(YTexel, LastYTexel, SubsampleFrac.x);
ITexel = lerp(ITexel, LastITexel, SubsampleFrac.y);
QTexel = lerp(QTexel, LastQTexel, SubsampleFrac.z);
// -- RGB Tint & Shift --
float ShiftedRedY = dot(YTexel, float3(RedFromRed, RedFromGrn, RedFromBlu));
@ -199,8 +198,8 @@ float4 ps_main(PS_INPUT Input) : COLOR
// -- Final Pixel --
float4 Output = lerp(Input.Color, float4(OutRGB, BaseTexel.a) * Input.Color, Input.ExtraInfo.x);
return BaseTexel;
return Output;
}
//-----------------------------------------------------------------------------

29
hlsl/color_heavy.fx
View File

@ -129,26 +129,25 @@ uniform float QSubsampleLength = 3.0f;
float4 ps_main(PS_INPUT Input) : COLOR
{
// -- Bandwidth Subsampling --
float YSubsampleWidth = (RawWidth * 2.0f) / YSubsampleLength;
float ISubsampleWidth = (RawWidth * 2.0f) / ISubsampleLength;
float QSubsampleWidth = (RawWidth * 2.0f) / QSubsampleLength;
float3 SubsampleWidth = float3(YSubsampleWidth, ISubsampleWidth, QSubsampleWidth);
float3 SubsampleFrac = frac(Input.TexCoord.x * SubsampleWidth);
float3 SubsampleCoord = (Input.TexCoord.x * SubsampleWidth - SubsampleFrac) / SubsampleWidth + SubsampleFrac / (SubsampleWidth * 2.0f);
float3 SubsampleWidth = float3(YSubsampleLength, ISubsampleLength, QSubsampleLength);
SubsampleWidth = (RawWidth * 2.0f) / SubsampleWidth;
float3 SubsampleCoord = Input.TexCoord.x;
float3 SubsampleFrac = frac(SubsampleCoord * SubsampleWidth); // Fraction is in subsample width units!
SubsampleCoord = (SubsampleCoord * SubsampleWidth - SubsampleFrac) / SubsampleWidth;
float4 BaseTexel = tex2D(DiffuseSampler, Input.TexCoord);
float3 YTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.x, Input.TexCoord.y)).rgb;
float3 ITexel = tex2D(DiffuseSampler, float2(SubsampleCoord.y, Input.TexCoord.y)).rgb;
float3 QTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.z, Input.TexCoord.y)).rgb;
float3 LastYTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.x - SubsampleFrac.x / RawWidth, Input.TexCoord.y)).rgb;
float3 LastITexel = tex2D(DiffuseSampler, float2(SubsampleCoord.y - SubsampleFrac.y / RawWidth, Input.TexCoord.y)).rgb;
float3 LastQTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.z - SubsampleFrac.z / RawWidth, Input.TexCoord.y)).rgb;
float3 LastYTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.x + YSubsampleLength / (RawWidth * 2.0f), Input.TexCoord.y)).rgb;
float3 LastITexel = tex2D(DiffuseSampler, float2(SubsampleCoord.y + ISubsampleLength / (RawWidth * 2.0f), Input.TexCoord.y)).rgb;
float3 LastQTexel = tex2D(DiffuseSampler, float2(SubsampleCoord.z + QSubsampleLength / (RawWidth * 2.0f), Input.TexCoord.y)).rgb;
YTexel = lerp(LastYTexel, YTexel, SubsampleFrac.x);
ITexel = lerp(LastITexel, ITexel, SubsampleFrac.y);
QTexel = lerp(LastQTexel, QTexel, SubsampleFrac.z);
YTexel = lerp(YTexel, LastYTexel, SubsampleFrac.x);
ITexel = lerp(ITexel, LastITexel, SubsampleFrac.y);
QTexel = lerp(QTexel, LastQTexel, SubsampleFrac.z);
// -- RGB Tint & Shift --
float ShiftedRedY = dot(YTexel, float3(RedFromRed, RedFromGrn, RedFromBlu));
@ -199,8 +198,8 @@ float4 ps_main(PS_INPUT Input) : COLOR
// -- Final Pixel --
float4 Output = lerp(Input.Color, float4(OutRGB, BaseTexel.a) * Input.Color, Input.ExtraInfo.x);
return BaseTexel;
return Output;
}
//-----------------------------------------------------------------------------