- " if(!canvas.r) result.r = 1.0;\n"
- " if(!canvas.g) result.g = 1.0;\n"
- " if(!canvas.b) result.b = 1.0;\n"
- " if(!canvas.a) result.a = 1.0;\n"
+ " if(canvas.r == 0.) result.r = 1.0;\n"
+ " if(canvas.g == 0.) result.g = 1.0;\n"
+ " if(canvas.b == 0.) result.b = 1.0;\n"
+ " if(canvas.a == 0.) result.a = 1.0;\n"