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Slider Color correction with quadratic and logarithmic scale

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Gamma (log10) and other color correction sliders (brightness, contrast, saturation) now range from [-1 to +1] with pow 2 scaling.
This commit is contained in:
Bruno Herbelin
2023-03-12 11:19:43 +01:00
parent 811b270bae
commit 136d6052d8
1 changed files with 8 additions and 6 deletions
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14
src/ImGuiVisitor.cpp
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@@ -280,15 +280,17 @@ void ImGuiVisitor::visit(ImageProcessingShader &n)
ImGui::SameLine(0, IMGUI_SAME_LINE);
ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
ImGui::SliderFloat("##Gamma", &n.gamma.w, 0.5f, 10.f, "%.2f", 2.f);
float val = log10(n.gamma.w);
if ( ImGui::SliderFloat("##Gamma", &val, -1.f, 1.f, "%.3f", 2.f) )
n.gamma.w = exp10(val);
if (ImGui::IsItemDeactivatedAfterEdit()){
oss << "Gamma " << std::setprecision(2) << n.gamma.w;
oss << "Gamma " << std::setprecision(2) << val;
Action::manager().store(oss.str());
}
ImGui::SameLine(0, IMGUI_SAME_LINE);
if (ImGuiToolkit::TextButton("Gamma")) {
n.gamma = glm::vec4(1.f, 1.f, 1.f, 1.f);
oss << "Gamma 1.0, #FFFFFF";
oss << "Gamma 0.0, #FFFFFF";
Action::manager().store(oss.str());
}
@@ -296,7 +298,7 @@ void ImGuiVisitor::visit(ImageProcessingShader &n)
/// BRIGHTNESS
///
ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
ImGui::SliderFloat("##Brightness", &n.brightness, -1.0, 1.0);
ImGui::SliderFloat("##Brightness", &n.brightness, -1.0, 1.0, "%.3f", 2.f);
if (ImGui::IsItemDeactivatedAfterEdit()){
oss << "Brightness " << std::setprecision(2) << n.brightness;
Action::manager().store(oss.str());
@@ -312,7 +314,7 @@ void ImGuiVisitor::visit(ImageProcessingShader &n)
/// CONTRAST
///
ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
ImGui::SliderFloat("##Contrast", &n.contrast, -1.0, 1.0);
ImGui::SliderFloat("##Contrast", &n.contrast, -1.0, 1.0, "%.3f", 2.f);
if (ImGui::IsItemDeactivatedAfterEdit()){
oss << "Contrast " << std::setprecision(2) << n.contrast;
Action::manager().store(oss.str());
@@ -328,7 +330,7 @@ void ImGuiVisitor::visit(ImageProcessingShader &n)
/// SATURATION
///
ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
ImGui::SliderFloat("##Saturation", &n.saturation, -1.0, 1.0);
ImGui::SliderFloat("##Saturation", &n.saturation, -1.0, 1.0, "%.3f", 2.f);
if (ImGui::IsItemDeactivatedAfterEdit()){
oss << "Saturation " << std::setprecision(2) << n.saturation;
Action::manager().store(oss.str());