Update

Signed-off-by: begeekmyfriend <begeekmyfriend@gmail.com>

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:4.1.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Mar 05 14:42:21 CST 2020
+#Fri Dec 25 20:40:46 CST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip

library/src/main/res/raw/beauty.glsl

@@ -1,6 +1,6 @@
 #extension GL_OES_EGL_image_external : require
 
-precision highp float;
+precision mediump float;
 
 uniform samplerExternalOES inputImageTexture;
 uniform vec2 singleStepOffset;
@@ -16,6 +16,50 @@ const mat3 saturateMatrix = mat3(
 
 vec2 blurCoordinates[24];
 
+vec3 rgb2lab(vec3 color) {
+    float L = 0.3811 * color.b + 0.5783 * color.g + 0.0402 * color.r;
+    float M = 0.1967 * color.b + 0.7244 * color.g + 0.0782 * color.r;
+    float S = 0.0241 * color.b + 0.1288 * color.g + 0.8444 * color.r;
+    if (L == 0.0) L = 1.0;
+    if (M == 0.0) M = 1.0;
+    if (S == 0.0) S = 1.0;
+    L = log(L);
+    M = log(M);
+    S = log(S);
+    float ll = (L + M + S) / sqrt(3.0);
+    float aa = (L + M - 2.0 * S) / sqrt(6.0);
+    float bb = (L - M) / sqrt(2.0);
+    return vec3(ll, aa, bb);
+}
+
+vec3 lab2rgb(vec3 lab) {
+    float L = lab.r / sqrt(3.0) + lab.g / sqrt(6.0) + lab.b / sqrt(2.0);
+    float M = lab.r / sqrt(3.0) + lab.g / sqrt(6.0) - lab.b / sqrt(2.0);
+    float S = lab.r / sqrt(3.0) - 2.0 * lab.g / sqrt(6.0);
+    L = exp(L);
+    M = exp(M);
+    S = exp(S);
+    float b = 4.4679 * L - 3.5873 * M + 0.1193 * S;
+    float g = -1.2186 * L + 2.3809 * M - 0.1624 * S;
+    float r = -0.0497 * L - 0.2439 * M + 1.2045 * S;
+    if (b > 1.0) b = 1.0;
+    if (b < 0.0) b = 0.0;
+    if (g > 1.0) g = 1.0;
+    if (g < 0.0) g = 0.0;
+    if (r > 1.0) r = 1.0;
+    if (r < 0.0) r = 0.0;
+    return vec3(r,g,b);
+}
+
+float skinMask(vec3 color) {
+    vec3 lab = rgb2lab(color); // return values in the range [0, 1]
+    float a = smoothstep(0.45, 0.55, lab.g);
+    float b = smoothstep(0.46, 0.54, lab.b);
+    float c = 1.0 - smoothstep(0.9, 1.0, length(lab.gb));
+    float d = 1.0 - smoothstep(0.98, 1.02, lab.r);
+    return min(min(min(a, b), c), d);
+}
+
 float hardLight(float color) {
     if(color <= 0.5) {
         color = color * color * 2.0;
@@ -27,7 +71,8 @@ float hardLight(float color) {
 
 void main() {
     vec3 centralColor = texture2D(inputImageTexture, textureCoordinate).rgb;
-
+    //float mask = skinMask(centralColor);
+    if (true) {
         blurCoordinates[0] = textureCoordinate.xy + singleStepOffset * vec2(0.0, -10.0);
         blurCoordinates[1] = textureCoordinate.xy + singleStepOffset * vec2(0.0, 10.0);
         blurCoordinates[2] = textureCoordinate.xy + singleStepOffset * vec2(-10.0, 0.0);
@@ -81,9 +126,7 @@ void main() {
         sampleColor = sampleColor / 62.0;
 
         float highPass = centralColor.g - sampleColor + 0.5;
-
-    for(int i = 0; i < 5;i++)
-    {
+        for (int i = 0; i < 5; i++) {
             highPass = hardLight(highPass);
         }
         float luminance = dot(centralColor, W);
@@ -106,6 +149,8 @@ void main() {
 
         vec3 satColor = gl_FragColor.rgb * saturateMatrix;
         gl_FragColor.rgb = mix(gl_FragColor.rgb, satColor, params.a);
-
         gl_FragColor.rgb = vec3(gl_FragColor.rgb + vec3(-0.096));
+    } else {
+        gl_FragColor.rgb = centralColor;
+    }
 }