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Add Luminance parameter to Lumakey filter

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This commit is contained in:
Bruno Herbelin
2023-11-21 21:50:24 +01:00
parent cf3bceeb46
commit 657b05d077
3 changed files with 31 additions and 2 deletions
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3
rsc/shaders/filters/lumakey.glsl
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@@ -4,6 +4,7 @@
* (C) 2019-2022 Bruno Herbelin <bruno.herbelin@gmail.com>
* Distributed under GNU GPL3+ License
**/
uniform float Luminance;
uniform float Threshold;
uniform float Tolerance;
@@ -43,5 +44,5 @@ void mainImage( out vec4 fragColor, in vec2 fragCoord )
float L = dot(RGB, vec3(0.299, 0.587, 0.114));
// float L = lightness( RGB );
fragColor = vec4( RGB, smoothstep( Threshold, Threshold + Tolerance * Tolerance, L ) );
fragColor = vec4( RGB, smoothstep( Threshold, Threshold + Tolerance * Tolerance, abs(Luminance - L) ) );
}

28
src/ImGuiVisitor.cpp
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@@ -1358,6 +1358,34 @@ void ImGuiVisitor::visit (AlphaFilter& f)
Action::manager().store(oss.str());
}
}
// Luminance extra parameter
else {
float v = filter_parameters["Luminance"];
ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
if (ImGui::SliderFloat( "##Luminance", &v, 0.f, 1.f, "%.2f")) {
f.setProgramParameter("Luminance", v);
}
if (ImGui::IsItemHovered() && io.MouseWheel != 0.f ){
v = CLAMP( v + 0.01f * io.MouseWheel, 0.f, 1.f);
f.setProgramParameter("Luminance", v);
oss << AlphaFilter::operation_label[ f.operation() ];
oss << " : " << "Luminance" << " " << std::setprecision(3) << v;
Action::manager().store(oss.str());
}
if (ImGui::IsItemDeactivatedAfterEdit()) {
oss << AlphaFilter::operation_label[ f.operation() ];
oss << " : " << "Luminance" << " " << std::setprecision(3) << v;
Action::manager().store(oss.str());
}
ImGui::SameLine(0, IMGUI_SAME_LINE);
if (ImGuiToolkit::TextButton("Luminance")) {
v = 0.f;
f.setProgramParameter("Luminance", v);
oss << AlphaFilter::operation_label[ f.operation() ];
oss << " : " << "Luminance" << " " << std::setprecision(3) << v;
Action::manager().store(oss.str());
}
}
}

2
src/ImageFilter.cpp
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@@ -806,7 +806,7 @@ const char* AlphaFilter::operation_label[AlphaFilter::ALPHA_INVALID] = {
std::vector< FilteringProgram > AlphaFilter::programs_ = {
FilteringProgram("Chromakey","shaders/filters/chromakey.glsl", "", { { "Red", 0.0}, { "Green", 1.0}, { "Blue", 0.0}, { "Threshold", 0.5}, { "Tolerance", 0.5} }),
FilteringProgram("Lumakey", "shaders/filters/lumakey.glsl", "", { { "Threshold", 0.5}, { "Tolerance", 0.5} } ),
FilteringProgram("Lumakey", "shaders/filters/lumakey.glsl", "", { { "Luminance", 0.0}, { "Threshold", 0.5}, { "Tolerance", 0.5} } ),
FilteringProgram("coloralpha","shaders/filters/coloralpha.glsl", "", { { "Red", 0.0}, { "Green", 1.0}, { "Blue", 0.0} })
};