renderer: added new customization options to the blur shaders (#3650)

Adds to `decoration:blur:` `vibrancy` and `vibrancy_darkness`

6 files changed, 266 insertions, 80 deletions

diff --git a/example/hyprland.conf b/example/hyprland.conf
index 698335ea..0f830ec3 100644
--- a/example/hyprland.conf
+++ b/example/hyprland.conf
@@ -63,6 +63,8 @@ decoration {
         enabled = true
         size = 3
         passes = 1
+        
+        vibrancy = 0.1696
     }
 
     drop_shadow = true
diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 760e9e87..d07e6a6a 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -153,34 +153,36 @@ void CConfigManager::setDefaultVars() {
     configValues["debug:suppress_errors"].intValue    = 0;
     configValues["debug:watchdog_timeout"].intValue   = 5;
 
-    configValues["decoration:rounding"].intValue               = 0;
-    configValues["decoration:blur:enabled"].intValue           = 1;
-    configValues["decoration:blur:size"].intValue              = 8;
-    configValues["decoration:blur:passes"].intValue            = 1;
-    configValues["decoration:blur:ignore_opacity"].intValue    = 0;
-    configValues["decoration:blur:new_optimizations"].intValue = 1;
-    configValues["decoration:blur:xray"].intValue              = 0;
-    configValues["decoration:blur:noise"].floatValue           = 0.0117;
-    configValues["decoration:blur:contrast"].floatValue        = 0.8916;
-    configValues["decoration:blur:brightness"].floatValue      = 0.8172;
-    configValues["decoration:blur:special"].intValue           = 0;
-    configValues["decoration:active_opacity"].floatValue       = 1;
-    configValues["decoration:inactive_opacity"].floatValue     = 1;
-    configValues["decoration:fullscreen_opacity"].floatValue   = 1;
-    configValues["decoration:no_blur_on_oversized"].intValue   = 0;
-    configValues["decoration:drop_shadow"].intValue            = 1;
-    configValues["decoration:shadow_range"].intValue           = 4;
-    configValues["decoration:shadow_render_power"].intValue    = 3;
-    configValues["decoration:shadow_ignore_window"].intValue   = 1;
-    configValues["decoration:shadow_offset"].vecValue          = Vector2D();
-    configValues["decoration:shadow_scale"].floatValue         = 1.f;
-    configValues["decoration:col.shadow"].intValue             = 0xee1a1a1a;
-    configValues["decoration:col.shadow_inactive"].intValue    = INT_MAX;
-    configValues["decoration:dim_inactive"].intValue           = 0;
-    configValues["decoration:dim_strength"].floatValue         = 0.5f;
-    configValues["decoration:dim_special"].floatValue          = 0.2f;
-    configValues["decoration:dim_around"].floatValue           = 0.4f;
-    configValues["decoration:screen_shader"].strValue          = STRVAL_EMPTY;
+    configValues["decoration:rounding"].intValue                 = 0;
+    configValues["decoration:blur:enabled"].intValue             = 1;
+    configValues["decoration:blur:size"].intValue                = 8;
+    configValues["decoration:blur:passes"].intValue              = 1;
+    configValues["decoration:blur:ignore_opacity"].intValue      = 0;
+    configValues["decoration:blur:new_optimizations"].intValue   = 1;
+    configValues["decoration:blur:xray"].intValue                = 0;
+    configValues["decoration:blur:contrast"].floatValue          = 0.8916;
+    configValues["decoration:blur:brightness"].floatValue        = 1.0;
+    configValues["decoration:blur:vibrancy"].floatValue          = 0.1696;
+    configValues["decoration:blur:vibrancy_darkness"].floatValue = 0.0;
+    configValues["decoration:blur:noise"].floatValue             = 0.0117;
+    configValues["decoration:blur:special"].intValue             = 0;
+    configValues["decoration:active_opacity"].floatValue         = 1;
+    configValues["decoration:inactive_opacity"].floatValue       = 1;
+    configValues["decoration:fullscreen_opacity"].floatValue     = 1;
+    configValues["decoration:no_blur_on_oversized"].intValue     = 0;
+    configValues["decoration:drop_shadow"].intValue              = 1;
+    configValues["decoration:shadow_range"].intValue             = 4;
+    configValues["decoration:shadow_render_power"].intValue      = 3;
+    configValues["decoration:shadow_ignore_window"].intValue     = 1;
+    configValues["decoration:shadow_offset"].vecValue            = Vector2D();
+    configValues["decoration:shadow_scale"].floatValue           = 1.f;
+    configValues["decoration:col.shadow"].intValue               = 0xee1a1a1a;
+    configValues["decoration:col.shadow_inactive"].intValue      = INT_MAX;
+    configValues["decoration:dim_inactive"].intValue             = 0;
+    configValues["decoration:dim_strength"].floatValue           = 0.5f;
+    configValues["decoration:dim_special"].floatValue            = 0.2f;
+    configValues["decoration:dim_around"].floatValue             = 0.4f;
+    configValues["decoration:screen_shader"].strValue            = STRVAL_EMPTY;
 
     configValues["dwindle:pseudotile"].intValue                   = 0;
     configValues["dwindle:force_split"].intValue                  = 0;
diff --git a/src/render/OpenGL.cpp b/src/render/OpenGL.cpp
index 690b0ede..e047f287 100644
--- a/src/render/OpenGL.cpp
+++ b/src/render/OpenGL.cpp
@@ -307,15 +307,18 @@ void CHyprOpenGLImpl::initShaders() {
     m_RenderData.pCurrentMonData->m_shEXT.applyTint         = glGetUniformLocation(prog, "applyTint");
     m_RenderData.pCurrentMonData->m_shEXT.tint              = glGetUniformLocation(prog, "tint");
 
-    prog                                              = createProgram(TEXVERTSRC, FRAGBLUR1);
-    m_RenderData.pCurrentMonData->m_shBLUR1.program   = prog;
-    m_RenderData.pCurrentMonData->m_shBLUR1.tex       = glGetUniformLocation(prog, "tex");
-    m_RenderData.pCurrentMonData->m_shBLUR1.alpha     = glGetUniformLocation(prog, "alpha");
-    m_RenderData.pCurrentMonData->m_shBLUR1.proj      = glGetUniformLocation(prog, "proj");
-    m_RenderData.pCurrentMonData->m_shBLUR1.posAttrib = glGetAttribLocation(prog, "pos");
-    m_RenderData.pCurrentMonData->m_shBLUR1.texAttrib = glGetAttribLocation(prog, "texcoord");
-    m_RenderData.pCurrentMonData->m_shBLUR1.radius    = glGetUniformLocation(prog, "radius");
-    m_RenderData.pCurrentMonData->m_shBLUR1.halfpixel = glGetUniformLocation(prog, "halfpixel");
+    prog                                                      = createProgram(TEXVERTSRC, FRAGBLUR1);
+    m_RenderData.pCurrentMonData->m_shBLUR1.program           = prog;
+    m_RenderData.pCurrentMonData->m_shBLUR1.tex               = glGetUniformLocation(prog, "tex");
+    m_RenderData.pCurrentMonData->m_shBLUR1.alpha             = glGetUniformLocation(prog, "alpha");
+    m_RenderData.pCurrentMonData->m_shBLUR1.proj              = glGetUniformLocation(prog, "proj");
+    m_RenderData.pCurrentMonData->m_shBLUR1.posAttrib         = glGetAttribLocation(prog, "pos");
+    m_RenderData.pCurrentMonData->m_shBLUR1.texAttrib         = glGetAttribLocation(prog, "texcoord");
+    m_RenderData.pCurrentMonData->m_shBLUR1.radius            = glGetUniformLocation(prog, "radius");
+    m_RenderData.pCurrentMonData->m_shBLUR1.halfpixel         = glGetUniformLocation(prog, "halfpixel");
+    m_RenderData.pCurrentMonData->m_shBLUR1.passes            = glGetUniformLocation(prog, "passes");
+    m_RenderData.pCurrentMonData->m_shBLUR1.vibrancy          = glGetUniformLocation(prog, "vibrancy");
+    m_RenderData.pCurrentMonData->m_shBLUR1.vibrancy_darkness = glGetUniformLocation(prog, "vibrancy_darkness");
 
     prog                                              = createProgram(TEXVERTSRC, FRAGBLUR2);
     m_RenderData.pCurrentMonData->m_shBLUR2.program   = prog;
@@ -327,15 +330,23 @@ void CHyprOpenGLImpl::initShaders() {
     m_RenderData.pCurrentMonData->m_shBLUR2.radius    = glGetUniformLocation(prog, "radius");
     m_RenderData.pCurrentMonData->m_shBLUR2.halfpixel = glGetUniformLocation(prog, "halfpixel");
 
+    prog                                                     = createProgram(TEXVERTSRC, FRAGBLURPREPARE);
+    m_RenderData.pCurrentMonData->m_shBLURPREPARE.program    = prog;
+    m_RenderData.pCurrentMonData->m_shBLURPREPARE.tex        = glGetUniformLocation(prog, "tex");
+    m_RenderData.pCurrentMonData->m_shBLURPREPARE.proj       = glGetUniformLocation(prog, "proj");
+    m_RenderData.pCurrentMonData->m_shBLURPREPARE.posAttrib  = glGetAttribLocation(prog, "pos");
+    m_RenderData.pCurrentMonData->m_shBLURPREPARE.texAttrib  = glGetAttribLocation(prog, "texcoord");
+    m_RenderData.pCurrentMonData->m_shBLURPREPARE.contrast   = glGetUniformLocation(prog, "contrast");
+    m_RenderData.pCurrentMonData->m_shBLURPREPARE.brightness = glGetUniformLocation(prog, "brightness");
+
     prog                                                    = createProgram(TEXVERTSRC, FRAGBLURFINISH);
     m_RenderData.pCurrentMonData->m_shBLURFINISH.program    = prog;
     m_RenderData.pCurrentMonData->m_shBLURFINISH.tex        = glGetUniformLocation(prog, "tex");
     m_RenderData.pCurrentMonData->m_shBLURFINISH.proj       = glGetUniformLocation(prog, "proj");
     m_RenderData.pCurrentMonData->m_shBLURFINISH.posAttrib  = glGetAttribLocation(prog, "pos");
     m_RenderData.pCurrentMonData->m_shBLURFINISH.texAttrib  = glGetAttribLocation(prog, "texcoord");
-    m_RenderData.pCurrentMonData->m_shBLURFINISH.noise      = glGetUniformLocation(prog, "noise");
-    m_RenderData.pCurrentMonData->m_shBLURFINISH.contrast   = glGetUniformLocation(prog, "contrast");
     m_RenderData.pCurrentMonData->m_shBLURFINISH.brightness = glGetUniformLocation(prog, "brightness");
+    m_RenderData.pCurrentMonData->m_shBLURFINISH.noise      = glGetUniformLocation(prog, "noise");
 
     prog                                                    = createProgram(QUADVERTSRC, FRAGSHADOW);
     m_RenderData.pCurrentMonData->m_shSHADOW.program        = prog;
@@ -912,8 +923,10 @@ CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* o
     wlr_matrix_multiply(glMatrix, m_RenderData.projection, matrix);
 
     // get the config settings
-    static auto* const PBLURSIZE   = &g_pConfigManager->getConfigValuePtr("decoration:blur:size")->intValue;
-    static auto* const PBLURPASSES = &g_pConfigManager->getConfigValuePtr("decoration:blur:passes")->intValue;
+    static auto* const PBLURSIZE             = &g_pConfigManager->getConfigValuePtr("decoration:blur:size")->intValue;
+    static auto* const PBLURPASSES           = &g_pConfigManager->getConfigValuePtr("decoration:blur:passes")->intValue;
+    static auto* const PBLURVIBRANCY         = &g_pConfigManager->getConfigValuePtr("decoration:blur:vibrancy")->floatValue;
+    static auto* const PBLURVIBRANCYDARKNESS = &g_pConfigManager->getConfigValuePtr("decoration:blur:vibrancy_darkness")->floatValue;
 
     // prep damage
     CRegion damage{*originalDamage};
@@ -927,7 +940,7 @@ CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* o
 
     CFramebuffer* currentRenderToFB = PMIRRORFB;
 
-    // begin with color adjustments
+    // Begin with base color adjustments - global brightness and contrast
     // TODO: make this a part of the first pass maybe to save on a drawcall?
     {
         static auto* const PBLURCONTRAST   = &g_pConfigManager->getConfigValuePtr("decoration:blur:contrast")->floatValue;
@@ -941,24 +954,23 @@ CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* o
 
         glTexParameteri(m_RenderData.pCurrentMonData->primaryFB.m_cTex.m_iTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 
-        glUseProgram(m_RenderData.pCurrentMonData->m_shBLURFINISH.program);
+        glUseProgram(m_RenderData.pCurrentMonData->m_shBLURPREPARE.program);
 
 #ifndef GLES2
-        glUniformMatrix3fv(m_RenderData.pCurrentMonData->m_shBLURFINISH.proj, 1, GL_TRUE, glMatrix);
+        glUniformMatrix3fv(m_RenderData.pCurrentMonData->m_shBLURPREPARE.proj, 1, GL_TRUE, glMatrix);
 #else
         wlr_matrix_transpose(glMatrix, glMatrix);
         glUniformMatrix3fv(m_RenderData.pCurrentMonData->m_shBLURFINISH.proj, 1, GL_FALSE, glMatrix);
 #endif
-        glUniform1f(m_RenderData.pCurrentMonData->m_shBLURFINISH.contrast, *PBLURCONTRAST);
-        glUniform1f(m_RenderData.pCurrentMonData->m_shBLURFINISH.brightness, *PBLURBRIGHTNESS);
+        glUniform1f(m_RenderData.pCurrentMonData->m_shBLURPREPARE.contrast, *PBLURCONTRAST);
+        glUniform1f(m_RenderData.pCurrentMonData->m_shBLURPREPARE.brightness, *PBLURBRIGHTNESS);
+        glUniform1i(m_RenderData.pCurrentMonData->m_shBLURPREPARE.tex, 0);
 
-        glUniform1i(m_RenderData.pCurrentMonData->m_shBLURFINISH.tex, 0);
+        glVertexAttribPointer(m_RenderData.pCurrentMonData->m_shBLURPREPARE.posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
+        glVertexAttribPointer(m_RenderData.pCurrentMonData->m_shBLURPREPARE.texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
 
-        glVertexAttribPointer(m_RenderData.pCurrentMonData->m_shBLURFINISH.posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
-        glVertexAttribPointer(m_RenderData.pCurrentMonData->m_shBLURFINISH.texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
-
-        glEnableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURFINISH.posAttrib);
-        glEnableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURFINISH.texAttrib);
+        glEnableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURPREPARE.posAttrib);
+        glEnableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURPREPARE.texAttrib);
 
         if (!damage.empty()) {
             for (auto& RECT : damage.getRects()) {
@@ -967,8 +979,8 @@ CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* o
             }
         }
 
-        glDisableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURFINISH.posAttrib);
-        glDisableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURFINISH.texAttrib);
+        glDisableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURPREPARE.posAttrib);
+        glDisableVertexAttribArray(m_RenderData.pCurrentMonData->m_shBLURPREPARE.texAttrib);
 
         currentRenderToFB = PMIRRORSWAPFB;
     }
@@ -996,10 +1008,13 @@ CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* o
         glUniformMatrix3fv(pShader->proj, 1, GL_FALSE, glMatrix);
 #endif
         glUniform1f(pShader->radius, *PBLURSIZE * a); // this makes the blursize change with a
-        if (pShader == &m_RenderData.pCurrentMonData->m_shBLUR1)
+        if (pShader == &m_RenderData.pCurrentMonData->m_shBLUR1) {
             glUniform2f(m_RenderData.pCurrentMonData->m_shBLUR1.halfpixel, 0.5f / (m_RenderData.pMonitor->vecPixelSize.x / 2.f),
                         0.5f / (m_RenderData.pMonitor->vecPixelSize.y / 2.f));
-        else
+            glUniform1i(m_RenderData.pCurrentMonData->m_shBLUR1.passes, *PBLURPASSES);
+            glUniform1f(m_RenderData.pCurrentMonData->m_shBLUR1.vibrancy, *PBLURVIBRANCY);
+            glUniform1f(m_RenderData.pCurrentMonData->m_shBLUR1.vibrancy_darkness, *PBLURVIBRANCYDARKNESS);
+        } else
             glUniform2f(m_RenderData.pCurrentMonData->m_shBLUR2.halfpixel, 0.5f / (m_RenderData.pMonitor->vecPixelSize.x * 2.f),
                         0.5f / (m_RenderData.pMonitor->vecPixelSize.y * 2.f));
         glUniform1i(pShader->tex, 0);
@@ -1045,9 +1060,10 @@ CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* o
         drawPass(&m_RenderData.pCurrentMonData->m_shBLUR2, &tempDamage);        // up
     }
 
-    // finalize with noise
+    // finalize the image
     {
-        static auto* const PBLURNOISE = &g_pConfigManager->getConfigValuePtr("decoration:blur:noise")->floatValue;
+        static auto* const PBLURNOISE      = &g_pConfigManager->getConfigValuePtr("decoration:blur:noise")->floatValue;
+        static auto* const PBLURBRIGHTNESS = &g_pConfigManager->getConfigValuePtr("decoration:blur:brightness")->floatValue;
 
         if (currentRenderToFB == PMIRRORFB)
             PMIRRORSWAPFB->bind();
@@ -1069,6 +1085,7 @@ CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* o
         glUniformMatrix3fv(m_RenderData.pCurrentMonData->m_shBLURFINISH.proj, 1, GL_FALSE, glMatrix);
 #endif
         glUniform1f(m_RenderData.pCurrentMonData->m_shBLURFINISH.noise, *PBLURNOISE);
+        glUniform1f(m_RenderData.pCurrentMonData->m_shBLURFINISH.brightness, *PBLURBRIGHTNESS);
 
         glUniform1i(m_RenderData.pCurrentMonData->m_shBLURFINISH.tex, 0);
 
diff --git a/src/render/OpenGL.hpp b/src/render/OpenGL.hpp
index 7e3e4e7c..0c6ef13c 100644
--- a/src/render/OpenGL.hpp
+++ b/src/render/OpenGL.hpp
@@ -64,6 +64,7 @@ struct SMonitorRenderData {
     CShader m_shEXT;
     CShader m_shBLUR1;
     CShader m_shBLUR2;
+    CShader m_shBLURPREPARE;
     CShader m_shBLURFINISH;
     CShader m_shSHADOW;
     CShader m_shBORDER1;
diff --git a/src/render/Shader.hpp b/src/render/Shader.hpp
index b67f61ef..70fe468c 100644
--- a/src/render/Shader.hpp
+++ b/src/render/Shader.hpp
@@ -46,13 +46,21 @@ class CShader {
     GLint   distort = -1;
     GLint   output  = -1;
 
-    GLint   noise      = -1;
-    GLint   contrast   = -1;
-    GLint   brightness = -1;
+    // Blur prepare
+    GLint contrast = -1;
 
-    GLint   getUniformLocation(const std::string&);
+    // Blur
+    GLint passes            = -1; // Used by `vibrancy`
+    GLint vibrancy          = -1;
+    GLint vibrancy_darkness = -1;
 
-    void    destroy();
+    // Blur finish
+    GLint brightness = -1;
+    GLint noise      = -1;
+
+    GLint getUniformLocation(const std::string&);
+
+    void  destroy();
 
   private:
     std::unordered_map<std::string, GLint> m_muUniforms;
diff --git a/src/render/shaders/Textures.hpp b/src/render/shaders/Textures.hpp
index cf753bb4..15e80410 100644
--- a/src/render/shaders/Textures.hpp
+++ b/src/render/shaders/Textures.hpp
@@ -180,12 +180,116 @@ void main() {
 
 inline const std::string FRAGBLUR1 = R"#(
 #version 100
-precision mediump float;
+precision            mediump float;
 varying mediump vec2 v_texcoord; // is in 0-1
-uniform sampler2D tex;
+uniform sampler2D    tex;
+
+uniform float        radius;
+uniform vec2         halfpixel;
+uniform int          passes;
+uniform float        vibrancy;
+uniform float        vibrancy_darkness;
+
+// see http://alienryderflex.com/hsp.html
+const float Pr = 0.299;
+const float Pg = 0.587;
+const float Pb = 0.114;
+
+// Y is "v" ( brightness ). X is "s" ( saturation )
+// see https://www.desmos.com/3d/a88652b9a4
+// Determines if high brightness or high saturation is more important
+const float a = 0.93;
+const float b = 0.11;
+const float c = 0.66; //  Determines the smoothness of the transition of unboosted to boosted colors
+//
+
+// http://www.flong.com/archive/texts/code/shapers_circ/
+float doubleCircleSigmoid(float x, float a) {
+    float min_param_a = 0.0;
+    float max_param_a = 1.0;
+    a                 = max(min_param_a, min(max_param_a, a));
+
+    float y = .0;
+    if (x <= a) {
+        y = a - sqrt(a * a - x * x);
+    } else {
+        y = a + sqrt(pow(1. - a, 2.) - pow(x - 1., 2.));
+    }
+    return y;
+}
 
-uniform float radius;
-uniform vec2 halfpixel;
+vec3 rgb2hsl(vec3 col) {
+    float red   = col.r;
+    float green = col.g;
+    float blue  = col.b;
+
+    float minc  = min(col.r, min(col.g, col.b));
+    float maxc  = max(col.r, max(col.g, col.b));
+    float delta = maxc - minc;
+
+    float lum = (minc + maxc) * 0.5;
+    float sat = 0.0;
+    float hue = 0.0;
+
+    if (lum > 0.0 && lum < 1.0) {
+        float mul = (lum < 0.5) ? (lum) : (1.0 - lum);
+        sat       = delta / (mul * 2.0);
+    }
+
+    vec3  masks = vec3((maxc == red && maxc != green) ? 1.0 : 0.0, (maxc == green && maxc != blue) ? 1.0 : 0.0, (maxc == blue && maxc != red) ? 1.0 : 0.0);
+
+    vec3  adds = vec3(((green - blue) / delta), 2.0 + ((blue - red) / delta), 4.0 + ((red - green) / delta));
+
+    float deltaGtz = (delta > 0.0) ? 1.0 : 0.0;
+
+    hue += dot(adds, masks);
+    hue *= deltaGtz;
+    hue /= 6.0;
+
+    if (hue < 0.0)
+        hue += 1.0;
+
+    return vec3(hue, sat, lum);
+}
+vec3 hsl2rgb(vec3 col) {
+    const float onethird = 1.0 / 3.0;
+    const float twothird = 2.0 / 3.0;
+    const float rcpsixth = 6.0;
+
+    float       hue = col.x;
+    float       sat = col.y;
+    float       lum = col.z;
+
+    vec3        xt = vec3(rcpsixth * (hue - twothird), 0.0, rcpsixth * (1.0 - hue));
+
+    if (hue < twothird) {
+        xt.r = 0.0;
+        xt.g = rcpsixth * (twothird - hue);
+        xt.b = rcpsixth * (hue - onethird);
+    }
+
+    if (hue < onethird) {
+        xt.r = rcpsixth * (onethird - hue);
+        xt.g = rcpsixth * hue;
+        xt.b = 0.0;
+    }
+
+    xt = min(xt, 1.0);
+
+    float sat2   = 2.0 * sat;
+    float satinv = 1.0 - sat;
+    float luminv = 1.0 - lum;
+    float lum2m1 = (2.0 * lum) - 1.0;
+    vec3  ct     = (sat2 * xt) + satinv;
+
+    vec3  rgb;
+    if (lum >= 0.5)
+        rgb = (luminv * ct) + lum2m1;
+    else
+        rgb = lum * ct;
+
+    return rgb;
+}
 
 void main() {
     vec2 uv = v_texcoord * 2.0;
@@ -196,7 +300,28 @@ void main() {
     sum += texture2D(tex, uv + vec2(halfpixel.x, -halfpixel.y) * radius);
     sum += texture2D(tex, uv - vec2(halfpixel.x, -halfpixel.y) * radius);
 
-    gl_FragColor = sum / 8.0;
+    vec4 color = sum / 8.0;
+
+    if (vibrancy == 0.0) {
+        gl_FragColor = color;
+    } else {
+        // Invert it so that it correctly maps to the config setting
+        float vibrancy_darkness1 = 1.0 - vibrancy_darkness;
+
+        // Decrease the RGB components based on their perceived brightness, to prevent visually dark colors from overblowing the rest.
+        vec3 hsl = rgb2hsl(color.rgb);
+        // Calculate perceived brightness, as not boost visually dark colors like deep blue as much as equally saturated yellow
+        float perceivedBrightness = doubleCircleSigmoid(sqrt(color.r * color.r * Pr + color.g * color.g * Pg + color.b * color.b * Pb), 0.8 * vibrancy_darkness1);
+
+        float b1        = b * vibrancy_darkness1;
+        float boostBase = hsl[1] > 0.0 ? smoothstep(b1 - c * 0.5, b1 + c * 0.5, 1.0 - (pow(1.0 - hsl[1] * cos(a), 2.0) + pow(1.0 - perceivedBrightness * sin(a), 2.0))) : 0.0;
+
+        float saturation = clamp(hsl[1] + (boostBase * vibrancy) / float(passes), 0.0, 1.0);
+
+        vec3  newColor = hsl2rgb(vec3(hsl[0], saturation, hsl[2]));
+
+        gl_FragColor = vec4(newColor, color[3]);
+    }
 }
 )#";
 
@@ -226,35 +351,66 @@ void main() {
 }
 )#";
 
-inline const std::string FRAGBLURFINISH = R"#(
-precision mediump float;
-varying vec2 v_texcoord; // is in 0-1
+inline const std::string FRAGBLURPREPARE = R"#(
+precision         mediump float;
+varying vec2      v_texcoord; // is in 0-1
 uniform sampler2D tex;
 
-uniform float contrast;
-uniform float noise;
-uniform float brightness;
+uniform float     contrast;
+uniform float     brightness;
 
-float hash(vec2 p) {
-	return fract(sin(dot(p, vec2(12.9898, 78.233))) * 43758.5453);
+float gain(float x, float k) {
+    float a = 0.5 * pow(2.0 * ((x < 0.5) ? x : 1.0 - x), k);
+    return (x < 0.5) ? a : 1.0 - a;
 }
 
 void main() {
     vec4 pixColor = texture2D(tex, v_texcoord);
 
     // contrast
-    pixColor.rgb = (pixColor.rgb - 0.5) * contrast + 0.5;
+    if (contrast != 1.0) {
+        pixColor.r = gain(pixColor.r, contrast);
+        pixColor.g = gain(pixColor.g, contrast);
+        pixColor.b = gain(pixColor.b, contrast);
+    }
 
     // brightness
-    pixColor.rgb *= brightness;
+    if (brightness > 1.0) {
+        pixColor.rgb *= brightness;
+    }
+
+    gl_FragColor = pixColor;
+}
+)#";
+
+inline const std::string FRAGBLURFINISH = R"#(
+precision         mediump float;
+varying vec2      v_texcoord; // is in 0-1
+uniform sampler2D tex;
+
+uniform float     noise;
+uniform float     brightness;
+
+float hash(vec2 p) {
+    return fract(sin(dot(p, vec2(12.9898, 78.233))) * 43758.5453);
+}
+
+void main() {
+    vec4 pixColor = texture2D(tex, v_texcoord);
 
     // noise
-    float noiseHash = hash(v_texcoord);
+    float noiseHash   = hash(v_texcoord);
     float noiseAmount = (mod(noiseHash, 1.0) - 0.5);
     pixColor.rgb += noiseAmount * noise;
 
+    // brightness
+    if (brightness < 1.0) {
+        pixColor.rgb *= brightness;
+    }
+
     gl_FragColor = pixColor;
-})#";
+}
+)#";
 
 inline const std::string TEXFRAGSRCEXT = R"#(
 #extension GL_OES_EGL_image_external : require