anchor.diff:  
   
     FRAGMENT_PALETTE_FLAG_SHADER =
  -  '#version 150'#13#10 +
  +  '#version 330'#13#10 +
     'const vec4 maskColor = vec4(1.0, 1.0, 0.0, 0.0);'+
     'uniform usampler2DRect bitmap;'+
     'uniform sampler1D palette;'+
  
positive.code: 
  const
    VERTEX_DEFAULT_SHADER =
    '#version 150'#13#10+
    'uniform mat4 viewMatrix, projMatrix;'#13#10+
    'in ivec2 coords;'+
    'void main(){'+
  
negative.code:   '}';
  
    FRAGMENT_PALETTE_SHADER =
    '#version 330'#13#10 +
    'uniform usampler2DRect bitmap;'+
    'uniform sampler1D palette;'+
    'layout (origin_upper_left) in vec4 gl_FragCoord;'+
  