GS: Add gamma control to ShadeBoost

Author: Gonzalosilvalde

bin/resources/shaders/opengl/shadeboost.glsl

@@ -30,6 +30,7 @@ vec4 ContrastSaturationBrightness(vec4 color)
 	float brt = params.x;
 	float con = params.y;
 	float sat = params.z;
+    float gam = params.w;
 
 	// Increase or decrease these values to adjust r, g and b color channels separately
 	const float AvgLumR = 0.5;
@@ -45,7 +46,10 @@ vec4 ContrastSaturationBrightness(vec4 color)
 	vec3 satColor = mix(intensity, brtColor, sat);
 	vec3 conColor = mix(AvgLumin, satColor, con);
 
-	color.rgb = conColor;
+	vec3 csb = conColor;
+    csb = pow(csb, vec3(1.0 / gam));
+    color.rgb = csb;
+
 	return color;
 }
 

bin/resources/shaders/vulkan/shadeboost.glsl

@@ -44,6 +44,7 @@ vec4 ContrastSaturationBrightness(vec4 color)
     float brt = params.x;
     float con = params.y;
     float sat = params.z;
+    float gam = params.w;
 
     // Increase or decrease these values to adjust r, g and b color channels separately
     const float AvgLumR = 0.5;
@@ -59,7 +60,9 @@ vec4 ContrastSaturationBrightness(vec4 color)
     vec3 satColor = mix(intensity, brtColor, sat);
     vec3 conColor = mix(AvgLumin, satColor, con);
 
-    color.rgb = conColor;
+    vec3 csb = conColor;
+    csb = pow(csb, vec3(1.0 / gam));
+    color.rgb = csb;
     return color;
 }
 

pcsx2-qt/Settings/GraphicsSettingsWidget.cpp

@@ -134,6 +134,7 @@ GraphicsSettingsWidget::GraphicsSettingsWidget(SettingsWindow* dialog, QWidget*
 	SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.fxaa, "EmuCore/GS", "fxaa", false);
 	SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.shadeBoost, "EmuCore/GS", "ShadeBoost", false);
 	SettingWidgetBinder::BindWidgetToIntSetting(sif, m_ui.shadeBoostBrightness, "EmuCore/GS", "ShadeBoost_Brightness", false);
+	SettingWidgetBinder::BindWidgetToIntSetting(sif, m_ui.shadeBoostGamma, "EmuCore/GS", "ShadeBoost_Gamma", false);
 	SettingWidgetBinder::BindWidgetToIntSetting(sif, m_ui.shadeBoostContrast, "EmuCore/GS", "ShadeBoost_Contrast", false);
 	SettingWidgetBinder::BindWidgetToIntSetting(sif, m_ui.shadeBoostSaturation, "EmuCore/GS", "ShadeBoost_Saturation", false);
 	SettingWidgetBinder::BindWidgetToIntSetting(sif, m_ui.tvShader, "EmuCore/GS", "TVShader", DEFAULT_TV_SHADER_MODE);

pcsx2-qt/Settings/GraphicsSettingsWidget.ui

@@ -1532,6 +1532,26 @@
               </property>
              </widget>
             </item>
+            <item>
+             <widget class="QLabel" name="gammaLabel">
+              <property name="text">
+               <string>Gamma:</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QSpinBox" name="shadeBoostGamma">
+              <property name="minimum">
+               <number>1</number>
+              </property>
+              <property name="maximum">
+               <number>100</number>
+              </property>
+              <property name="value">
+               <number>50</number>
+              </property>
+             </widget>
+            </item>
            </layout>
           </item>
          </layout>

pcsx2/Config.h

@@ -818,6 +818,7 @@ struct Pcsx2Config
 		u8 ShadeBoost_Brightness = 50;
 		u8 ShadeBoost_Contrast = 50;
 		u8 ShadeBoost_Saturation = 50;
+        u8 ShadeBoost_Gamma = 50;
 		u8 PNGCompressionLevel = 1;
 
 		u16 SWExtraThreads = 2;

pcsx2/GS/Renderers/Common/GSDevice.cpp

@@ -768,6 +768,7 @@ void GSDevice::ShadeBoost()
 			static_cast<float>(GSConfig.ShadeBoost_Brightness) * (1.0f / 50.0f),
 			static_cast<float>(GSConfig.ShadeBoost_Contrast) * (1.0f / 50.0f),
 			static_cast<float>(GSConfig.ShadeBoost_Saturation) * (1.0f / 50.0f),
+            static_cast<float>(GSConfig.ShadeBoost_Gamma) * (1.0f / 50.0f),
 		};
 
 		DoShadeBoost(m_current, m_target_tmp, params);

pcsx2/ImGui/FullscreenUI.cpp

@@ -4334,6 +4334,8 @@ void FullscreenUI::DrawGraphicsSettingsPage(SettingsInterface* bsi, bool show_ad
 			"ShadeBoost_Contrast", 50, 1, 100, "%d", shadeboost_active);
 		DrawIntRangeSetting(bsi, FSUI_CSTR("Shade Boost Saturation"), FSUI_CSTR("Adjusts saturation. 50 is normal."), "EmuCore/GS",
 			"ShadeBoost_Saturation", 50, 1, 100, "%d", shadeboost_active);
+        DrawIntRangeSetting(bsi, FSUI_CSTR("Shade Boost Gamma"), FSUI_CSTR("Adjusts gamma. 50 is normal."), "EmuCore/GS",
+            "ShadeBoost_Gamma", 50, 1, 100, "%d", shadeboost_active);
 
 		static constexpr const char* s_tv_shaders[] = {
 			FSUI_NSTR("None (Default)"),

pcsx2/Pcsx2Config.cpp

@@ -838,6 +838,7 @@ bool Pcsx2Config::GSOptions::OptionsAreEqual(const GSOptions& right) const
 		OpEqu(ShadeBoost_Brightness) &&
 		OpEqu(ShadeBoost_Contrast) &&
 		OpEqu(ShadeBoost_Saturation) &&
+        OpEqu(ShadeBoost_Gamma) &&
 		OpEqu(PNGCompressionLevel) &&
 		OpEqu(SaveDrawStart) &&
 		OpEqu(SaveDrawCount) &&
@@ -1029,6 +1030,7 @@ void Pcsx2Config::GSOptions::LoadSave(SettingsWrapper& wrap)
 	SettingsWrapBitfield(ShadeBoost_Brightness);
 	SettingsWrapBitfield(ShadeBoost_Contrast);
 	SettingsWrapBitfield(ShadeBoost_Saturation);
+	SettingsWrapBitfield(ShadeBoost_Gamma);
 	SettingsWrapBitfield(ExclusiveFullscreenControl);
 	SettingsWrapBitfieldEx(PNGCompressionLevel, "png_compression_level");
 	SettingsWrapBitfieldEx(SaveDrawStart, "SaveDrawStart");