source/blender/gpu/shaders/gpu_shader_image_modulate_alpha_frag.glsl


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#if __VERSION__ == 120
  varying vec2 texCoord_interp;
  #define fragColor gl_FragColor
#else
  in vec2 texCoord_interp;
  out vec4 fragColor;
  #define texture2D texture
#endif

uniform float alpha;
uniform sampler2D image;

void main()
{
	fragColor = texture2D(image, texCoord_interp);
	fragColor.a *= alpha;
}