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Correction: use the QAM texture for colours.

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Thomas Harte 2019-02-12 18:42:28 -05:00
parent cda0a2de79
commit 2fa4c59523
1 changed files with 5 additions and 8 deletions
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13
Outputs/OpenGL/ScanTargetGLSLFragments.cpp
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@ -421,15 +421,12 @@ std::unique_ptr<Shader> ScanTarget::conversion_shader() const {
// Split and average chrominance.
"vec2 chrominances[4] = vec2[4]("
"textureLod(textureName, qamTextureCoordinates[0], 0).gb,"
"textureLod(textureName, qamTextureCoordinates[1], 0).gb,"
"textureLod(textureName, qamTextureCoordinates[2], 0).gb,"
"textureLod(textureName, qamTextureCoordinates[3], 0).gb"
");"
"vec2 channels = vec2("
"dot(vec4(chrominances[0].x, chrominances[1].x, chrominances[2].x, chrominances[3].x), vec4(0.25))*2.0 - 1.0,"
"dot(vec4(chrominances[0].y, chrominances[1].y, chrominances[2].y, chrominances[3].y), vec4(0.25))*2.0 - 1.0"
"textureLod(qamTextureName, qamTextureCoordinates[0], 0).gb,"
"textureLod(qamTextureName, qamTextureCoordinates[1], 0).gb,"
"textureLod(qamTextureName, qamTextureCoordinates[2], 0).gb,"
"textureLod(qamTextureName, qamTextureCoordinates[3], 0).gb"
");"
"vec2 channels = (chrominances[0] + chrominances[1] + chrominances[2] + chrominances[3])*0.5 - vec2(1.0);"
// Apply a colour space conversion to get RGB.
"fragColour3 = mix("