Repo created

libs/shaders/GL/user_mark.fsh.glsl

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+// Warning! Beware to use this shader. "discard" command may significally reduce performance.
+// Unfortunately some CG algorithms cannot be implemented without discarding fragments from depth buffer.
+
+layout (location = 0) in vec4 v_texCoords;
+layout (location = 1) in vec4 v_maskColor;
+
+layout (location = 0) out vec4 v_FragColor;
+
+layout (binding = 0) uniform UBO
+{
+  mat4 u_modelView;
+  mat4 u_projection;
+  mat4 u_pivotTransform;
+  vec2 u_contrastGamma;
+  float u_opacity;
+  float u_zScale;
+  float u_interpolation;
+  float u_isOutlinePass;
+};
+
+layout (binding = 1) uniform sampler2D u_colorTex;
+
+void main()
+{
+  vec4 color = texture(u_colorTex, v_texCoords.xy);
+  vec4 bgColor = texture(u_colorTex, v_texCoords.zw) * vec4(v_maskColor.xyz, 1.0);
+  vec4 finalColor = mix(color, mix(bgColor, color, color.a), bgColor.a);
+  finalColor.a = clamp(color.a + bgColor.a, 0.0, 1.0) * u_opacity * v_maskColor.w;
+  if (finalColor.a < 0.01)
+    discard;
+  v_FragColor = finalColor;
+}