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Resolves repetition between svideo_sample and composite_sample.

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This commit is contained in:
Thomas Harte 2019-02-03 22:09:16 -05:00
parent b75ad3def2
commit e5f75b5df2
1 changed files with 29 additions and 50 deletions
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79
Outputs/OpenGL/ScanTargetGLSLFragments.cpp
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@ -315,63 +315,34 @@ std::unique_ptr<Shader> ScanTarget::conversion_shader() const {
fragment_shader +=
"uniform mat3 lumaChromaToRGB;"
"uniform mat3 rgbToLumaChroma;";
}
if(modals_.display_type == DisplayType::SVideo) {
fragment_shader +=
"vec2 svideo_sample(vec2 coordinate, float angle) {";
switch(modals_.input_data_type) {
case InputDataType::Luminance1:
case InputDataType::Luminance8:
// Easy, just copy across.
fragment_shader += "return vec2(textureLod(textureName, coordinate, 0).r, 0.0);";
break;
case InputDataType::PhaseLinkedLuminance8:
fragment_shader +=
"uint iPhase = uint((angle * 2.0 / 3.141592654) ) & 3u;" // + phaseOffset*4.0
"return vec2(textureLod(textureName, coordinate, 0)[iPhase], 0.0);";
break;
case InputDataType::Luminance8Phase8:
fragment_shader +=
"vec2 yc = textureLod(textureName, coordinate, 0).rg;"
"float phaseOffset = 3.141592654 * 2.0 * 2.0 * yc.y;"
"float rawChroma = step(yc.y, 0.75) * cos(angle + phaseOffset);"
"return vec2(yc.x, rawChroma);";
break;
case InputDataType::Red1Green1Blue1:
case InputDataType::Red2Green2Blue2:
case InputDataType::Red4Green4Blue4:
case InputDataType::Red8Green8Blue8:
fragment_shader +=
"vec3 colour = rgbToLumaChroma * textureLod(textureName, coordinate, 0).rgb;"
"vec2 quadrature = vec2(cos(angle), sin(angle));"
"return vec2(colour.r, dot(quadrature, colour.gb));";
break;
if(modals_.display_type == DisplayType::SVideo) {
fragment_shader +=
"vec2 svideo_sample(vec2 coordinate, float angle) {";
} else {
fragment_shader +=
"float composite_sample(vec2 coordinate, float angle) {";
}
fragment_shader += "}";
}
if(modals_.display_type == DisplayType::CompositeMonochrome || modals_.display_type == DisplayType::CompositeColour) {
fragment_shader +=
"float composite_sample(vec2 coordinate, float angle) {";
const bool is_svideo = modals_.display_type == DisplayType::SVideo;
switch(modals_.input_data_type) {
case InputDataType::Luminance1:
case InputDataType::Luminance8:
// Easy, just copy across.
fragment_shader += "return textureLod(textureName, coordinate, 0).r;";
fragment_shader +=
is_svideo ?
"return vec2(textureLod(textureName, coordinate, 0).r, 0.0);" :
"return textureLod(textureName, coordinate, 0).r;";
break;
case InputDataType::PhaseLinkedLuminance8:
fragment_shader +=
"uint iPhase = uint((angle * 2.0 / 3.141592654) ) & 3u;" // + phaseOffset*4.0
"return textureLod(textureName, coordinate, 0)[iPhase];";
"uint iPhase = uint((angle * 2.0 / 3.141592654) ) & 3u;";
fragment_shader +=
is_svideo ?
"return vec2(textureLod(textureName, coordinate, 0)[iPhase], 0.0);" :
"return textureLod(textureName, coordinate, 0)[iPhase];";
break;
case InputDataType::Luminance8Phase8:
@ -379,8 +350,12 @@ std::unique_ptr<Shader> ScanTarget::conversion_shader() const {
"vec2 yc = textureLod(textureName, coordinate, 0).rg;"
"float phaseOffset = 3.141592654 * 2.0 * 2.0 * yc.y;"
"float rawChroma = step(yc.y, 0.75) * cos(angle + phaseOffset);"
"return mix(yc.x, rawChroma, compositeAmplitude);";
"float rawChroma = step(yc.y, 0.75) * cos(angle + phaseOffset);";
fragment_shader +=
is_svideo ?
"return vec2(yc.x, rawChroma);" :
"return mix(yc.x, rawChroma, compositeAmplitude);";
break;
case InputDataType::Red1Green1Blue1:
@ -389,8 +364,12 @@ std::unique_ptr<Shader> ScanTarget::conversion_shader() const {
case InputDataType::Red8Green8Blue8:
fragment_shader +=
"vec3 colour = rgbToLumaChroma * textureLod(textureName, coordinate, 0).rgb;"
"vec2 quadrature = vec2(cos(angle), sin(angle));"
"return mix(colour.r, dot(quadrature, colour.gb), compositeAmplitude);";
"vec2 quadrature = vec2(cos(angle), sin(angle));";
fragment_shader +=
is_svideo ?
"return vec2(colour.r, dot(quadrature, colour.gb));" :
"return mix(colour.r, dot(quadrature, colour.gb), compositeAmplitude);";
break;
}