diff --git a/src/renderer/gl_engine/tvgGlShaderSrc.cpp b/src/renderer/gl_engine/tvgGlShaderSrc.cpp
index 368d66c5..e123cfb6 100644
--- a/src/renderer/gl_engine/tvgGlShaderSrc.cpp
+++ b/src/renderer/gl_engine/tvgGlShaderSrc.cpp
@@ -436,7 +436,7 @@ const char* MASK_LUMA_FRAG_SHADER = TVG_COMPOSE_SHADER(
             maskColor = vec4(maskColor.rgb / maskColor.a, maskColor.a);                                             \n
         }                                                                                                           \n
                                                                                                                     \n
-        FragColor = srcColor * (0.299 * maskColor.r + 0.587 * maskColor.g + 0.114 * maskColor.b) * maskColor.a;     \n
+        FragColor = srcColor * dot(maskColor.rgb, vec3(0.2125, 0.7154, 0.0721)) * maskColor.a;                      \n
     }                                                                                                               \n
 );
 
@@ -450,7 +450,7 @@ const char* MASK_INV_LUMA_FRAG_SHADER = TVG_COMPOSE_SHADER(
     {                                                                                   \n
         vec4 srcColor = texture(uSrcTexture, vUV);                                      \n
         vec4 maskColor = texture(uMaskTexture, vUV);                                    \n
-        float luma = (0.299 * maskColor.r + 0.587 * maskColor.g + 0.114 * maskColor.b); \n
+        float luma = dot(maskColor.rgb, vec3(0.2125, 0.7154, 0.0721));                  \n
         FragColor = srcColor * (1.0 - luma);                                            \n
     }                                                                                   \n
 );