fix(ColorLayer): Fix rendering issue on white to invisible effect

Closes #2236:
- Fix undefined value passed to uniforms effect_type and
  effect_parameter
- Remove useless intensity parameter of applyWhiteToInvisibleEffect
  function

src/Layer/ColorLayer.js

@@ -90,6 +90,9 @@ class ColorLayer extends RasterLayer {
         this.transparent = config.transparent || (this.opacity < 1.0);
         this.noTextureParentOutsideLimit = config.source ? config.source.isFileSource : false;
 
+        this.effect_type = config.effect_type ?? 0;
+        this.effect_parameter = config.effect_parameter ?? 1.0;
+
         // Feature options
         this.buildExtent = true;
         this.structure = '2d';

src/Renderer/Shader/Chunk/color_layers_pars_fragment.glsl

@@ -23,10 +23,10 @@ float getBorderDistance(vec2 uv) {
 
 float tolerance = 0.99;
 
-vec4 applyWhiteToInvisibleEffect(vec4 color, float intensity) {
+vec4 applyWhiteToInvisibleEffect(vec4 color) {
     float a = dot(color.rgb, vec3(0.333333333));
     if (a >= tolerance) {
-        color.a *= 1.0 - pow(abs(a), intensity);
+        color.a = 0.0;
     }
     return color;
 }
@@ -72,7 +72,7 @@ vec4 getLayerColor(int textureOffset, sampler2D tex, vec4 offsetScale, Layer lay
         if (layer.effect_type == 1) {
             color = applyLightColorToInvisibleEffect(color, layer.effect_parameter);
         } else if (layer.effect_type == 2) {
-            color = applyWhiteToInvisibleEffect(color, layer.effect_parameter);
+            color = applyWhiteToInvisibleEffect(color);
         }
     }
     color.a *= layer.opacity;