Differential D2889 Diff 10411 source/blender/draw/engines/gpencil/shaders/gpencil_zdepth_mix_frag.glsl

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				in vec4 uvcoordsvar;

				out vec4 FragColor;

				uniform sampler2D strokeColor;
				uniform sampler2D strokeDepth;
				uniform int tonemapping;

				float srgb_to_linearrgb(float c)
				{
				if (c < 0.04045)
				return (c < 0.0) ? 0.0 : c * (1.0 / 12.92);
				else
				return pow((c + 0.055) * (1.0 / 1.055), 2.4);
				}

				float linearrgb_to_srgb(float c)
				{
				if (c < 0.0031308)
				return (c < 0.0) ? 0.0 : c * 12.92;
				else
				return 1.055 * pow(c, 1.0 / 2.4) - 0.055;
				}

				void main()
				{
				ivec2 uv = ivec2(gl_FragCoord.xy);
				float stroke_depth = texelFetch(strokeDepth, uv, 0).r;
				vec4 stroke_color = texelFetch(strokeColor, uv, 0).rgba;

				/* premult alpha factor to remove double blend effects */
				if (stroke_color.a > 0) {
				stroke_color = vec4(vec3(stroke_color.rgb / stroke_color.a), stroke_color.a);
				}

				/* apply color correction for render only */
				if (tonemapping == 1) {
				stroke_color.r = srgb_to_linearrgb(stroke_color.r);
				stroke_color.g = srgb_to_linearrgb(stroke_color.g);
				stroke_color.b = srgb_to_linearrgb(stroke_color.b);
				}

				FragColor = stroke_color;
				gl_FragDepth = stroke_depth;
				}