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Attempts to avoid introducing phase error in scanToComposition.

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Also brightens S-Video up to RGB levels.
This commit is contained in:
Thomas Harte 2020-08-25 22:41:37 -04:00
parent e502d336db
commit 02cea40ffa
2 changed files with 2 additions and 2 deletions
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2
OSBindings/Mac/Clock Signal/ScanTarget/CSScanTarget.mm
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@ -398,7 +398,7 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
SignalProcessing::FIRFilter chrominancefilter(15, cyclesPerLine, 0.0f, colourCyclesPerLine * 0.25f);
const auto calculatedCoefficients = chrominancefilter.get_coefficients();
for(size_t c = 0; c < 8; ++c) {
firCoefficients[c].y = firCoefficients[c].z = calculatedCoefficients[c] * (isSVideoOutput ? 3.0f : 1.0f);
firCoefficients[c].y = firCoefficients[c].z = calculatedCoefficients[c] * (isSVideoOutput ? 4.0f : 1.0f);
}
uniforms()->radiansPerPixel = (colourCyclesPerLine * 3.141592654f * 2.0f) / cyclesPerLine;

2
OSBindings/Mac/Clock Signal/ScanTarget/ScanTarget.metal
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@ -193,7 +193,7 @@ vertex SourceInterpolator scanToComposition( constant Uniforms &uniforms [[buffe
// Map position into eye space, allowing for target texture dimensions.
const float2 textureSize = float2(texture.get_width(), texture.get_height());
result.position.xy =
((result.position.xy + float2(0.5f)) / textureSize)
((result.position.xy + float2(0.0f, 0.5f)) / textureSize)
* float2(2.0f, -2.0f) + float2(-1.0f, 1.0f);
return result;