Added theme support for defining color saturation for the image, video and animation components.

es-core/src/GuiComponent.cpp

@@ -33,6 +33,7 @@ GuiComponent::GuiComponent()
     , mSaturation {1.0f}
     , mDimming {1.0f}
     , mThemeOpacity {1.0f}
+    , mThemeSaturation {1.0f}
     , mRotation {0.0f}
     , mScale {1.0f}
     , mDefaultZIndex {0.0f}
@@ -376,6 +377,9 @@ void GuiComponent::applyTheme(const std::shared_ptr<ThemeData>& theme,
     else
         setVisible(true);
 
+    if (properties & ThemeFlags::SATURATION && elem->has("saturation"))
+        mThemeSaturation = glm::clamp(elem->get<float>("saturation"), 0.0f, 1.0f);
+
     if (properties && elem->has("gameselector"))
         mThemeGameSelector = elem->get<std::string>("gameselector");
 }

es-core/src/GuiComponent.h

@@ -303,6 +303,7 @@ protected:
     float mSaturation;
     float mDimming;
     float mThemeOpacity;
+    float mThemeSaturation;
     float mRotation;
     float mScale;
     float mDefaultZIndex;

es-core/src/ThemeData.cpp

@@ -96,6 +96,7 @@ std::map<std::string, std::map<std::string, ThemeData::ElementPropertyType>>
        {"gradientType", STRING},
        {"scrollFadeIn", BOOLEAN},
        {"opacity", FLOAT},
+       {"saturation", FLOAT},
        {"visible", BOOLEAN},
        {"zIndex", FLOAT}}},
      {"video",
@@ -116,6 +117,7 @@ std::map<std::string, std::map<std::string, ThemeData::ElementPropertyType>>
        {"fadeInTime", FLOAT},
        {"scrollFadeIn", BOOLEAN},
        {"opacity", FLOAT},
+       {"saturation", FLOAT},
        {"visible", BOOLEAN},
        {"zIndex", FLOAT},
        {"showSnapshotNoVideo", BOOLEAN}, // For backward compatibility with legacy themes.
@@ -132,6 +134,7 @@ std::map<std::string, std::map<std::string, ThemeData::ElementPropertyType>>
        {"keepAspectRatio", BOOLEAN},
        {"interpolation", STRING},
        {"opacity", FLOAT},
+       {"saturation", FLOAT},
        {"visible", BOOLEAN},
        {"zIndex", FLOAT}}},
      {"badges",

es-core/src/ThemeData.h

@@ -62,7 +62,8 @@ namespace ThemeFlags
         Z_INDEX =         0x00004000,
         ROTATION =        0x00008000,
         OPACITY =         0x00010000,
-        VISIBLE =         0x00020000,
+        SATURATION =      0x00020000,
+        VISIBLE =         0x00040000,
         ALL = 0xFFFFFFFF
     };
     // clang-format on

es-core/src/components/GIFAnimComponent.cpp

@@ -488,7 +488,7 @@ void GIFAnimComponent::render(const glm::mat4& parentTrans)
         for (int i = 0; i < 4; ++i)
             vertices[i].position = glm::round(vertices[i].position);
 
-        vertices->saturation = mSaturation;
+        vertices->saturation = mSaturation * mThemeSaturation;
         vertices->opacity = mOpacity * mThemeOpacity;
         vertices->dimming = mDimming;
         vertices->shaderFlags = Renderer::ShaderFlags::BGRA_TO_RGBA;

es-core/src/components/ImageComponent.cpp

@@ -419,7 +419,7 @@ void ImageComponent::render(const glm::mat4& parentTrans)
             else
                 fadeIn(mTexture->bind());
 
-            mVertices->saturation = mSaturation;
+            mVertices->saturation = mSaturation * mThemeSaturation;
             mVertices->opacity = mThemeOpacity;
             mVertices->dimming = mDimming;
 

es-core/src/components/LottieAnimComponent.cpp

@@ -477,7 +477,7 @@ void LottieAnimComponent::render(const glm::mat4& parentTrans)
         for (int i = 0; i < 4; ++i)
             vertices[i].position = glm::round(vertices[i].position);
 
-        vertices->saturation = mSaturation;
+        vertices->saturation = mSaturation * mThemeSaturation;
         vertices->opacity = mOpacity * mThemeOpacity;
         vertices->dimming = mDimming;
         vertices->shaderFlags = Renderer::ShaderFlags::BGRA_TO_RGBA;

es-core/src/components/VideoComponent.cpp

@@ -277,6 +277,7 @@ void VideoComponent::renderSnapshot(const glm::mat4& parentTrans)
 
     if (mStaticImagePath != "") {
         mStaticImage.setOpacity(mOpacity * mThemeOpacity);
+        mStaticImage.setSaturation(mSaturation * mThemeSaturation);
         mStaticImage.setDimming(mDimming);
         mStaticImage.render(parentTrans);
     }

es-core/src/components/VideoFFmpegComponent.cpp

@@ -165,10 +165,10 @@ void VideoFFmpegComponent::render(const glm::mat4& parentTrans)
         for (int i = 0; i < 4; ++i)
             vertices[i].position = glm::round(vertices[i].position);
 
-        if (mDecodedFrame && (mFadeIn < 1.0f || mThemeOpacity < 1.0f))
+        if (mFadeIn < 1.0f || mThemeOpacity < 1.0f)
             vertices->opacity = mFadeIn * mThemeOpacity;
 
-        vertices->saturation = mSaturation;
+        vertices->saturation = mSaturation * mThemeSaturation;
         vertices->dimming = mDimming;
 
         std::unique_lock<std::mutex> pictureLock(mPictureMutex);

es-core/src/renderers/RendererOpenGL.cpp

@@ -446,6 +446,7 @@ void RendererOpenGL::drawTriangleStrips(const Vertex* vertices,
             GL_CHECK_ERROR(glBufferData(GL_ARRAY_BUFFER, sizeof(Vertex) * numVertices, vertices,
                                         GL_DYNAMIC_DRAW));
             mScanlinelShader->setOpacity(vertices->opacity);
+            mScanlinelShader->setSaturation(vertices->saturation);
             mScanlinelShader->setTextureSize({shaderWidth, shaderHeight});
             GL_CHECK_ERROR(glDrawArrays(GL_TRIANGLE_STRIP, 0, numVertices));
             mLastShader = mScanlinelShader;

resources/shaders/glsl/scanlines.glsl

@@ -54,6 +54,7 @@ precision mediump float;
 
 uniform vec2 textureSize;
 uniform float opacity;
+uniform float saturation;
 uniform sampler2D textureSampler;
 in vec2 texCoord;
 in vec2 onex;
@@ -100,6 +101,13 @@ void main()
     float h_weight_00 = dx / SPOT_WIDTH;
     WEIGHT(h_weight_00);
 
+    // Saturation.
+    if (saturation != 1.0) {
+        vec3 grayscale = vec3(dot(color.rgb, vec3(0.34, 0.55, 0.11)));
+        vec3 blendedColor = mix(grayscale, color.rgb, saturation);
+        color = vec4(blendedColor, color.a);
+    }
+
     color *= vec4(h_weight_00, h_weight_00, h_weight_00, h_weight_00);
 
     // Get closest horizontal neighbour to blend.
@@ -114,6 +122,13 @@ void main()
     }
     vec4 colorNB = TEX2D(texture_coords + coords01);
 
+    // Saturation.
+    if (saturation != 1.0) {
+        vec3 grayscale = vec3(dot(colorNB.rgb, vec3(0.34, 0.55, 0.11)));
+        vec3 blendedColor = mix(grayscale, colorNB.rgb, saturation);
+        colorNB = vec4(blendedColor, colorNB.a);
+    }
+
     float h_weight_01 = dx / SPOT_WIDTH;
     WEIGHT(h_weight_01);
 
@@ -137,6 +152,13 @@ void main()
     }
     colorNB = TEX2D(texture_coords + coords10);
 
+    // Saturation.
+    if (saturation != 1.0) {
+        vec3 grayscale = vec3(dot(colorNB.rgb, vec3(0.34, 0.55, 0.11)));
+        vec3 blendedColor = mix(grayscale, colorNB.rgb, saturation);
+        colorNB = vec4(blendedColor, colorNB.a);
+    }
+
     float v_weight_10 = dy / SPOT_HEIGHT;
     WEIGHT(v_weight_10);