Differential D16284 Diff 56999 source/blender/gpu/shaders/gpu_shader_icon_frag.glsl

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source/blender/gpu/shaders/gpu_shader_icon_frag.glsl

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				/**
				* Draw the icons, leaving a semi-transparent rectangle on top of the icon.
				*
				JacquesLuckeUnsubmitted Done Inline Actions typo (`outer`) JacquesLucke: typo (`outer`)
				* The top-left corner of the rectangle is rounded and drawned with anti-alias.
				* The anti-alias is done by transitioning from the outer to the inner radius of
				* the rounded corner, and the rectangle sides.
				*/

				void main()
				{
				/* Top-left rounded corner parameters. */
				const float circle_radius_outer = 0.1;
				const float circle_radius_inner = 0.075;

				/**
				* Add a bit transparency to see a bit of the icon, without
				* getting on the way of readability. */
				const float mask_transparency = 0.25;

				vec2 circle_center = vec2(circle_radius_outer - text_width, 0.5);
				fragColor = texture(image, texCoord_interp) * color;

				/* radius in icon space (1 is the icon width). */
				float radius = length(mask_coord_interp - circle_center);
				float mask = smoothstep(circle_radius_inner, circle_radius_outer, radius);

				bool lower_half = mask_coord_interp.y < circle_center.y;
				bool right_half = mask_coord_interp.x > circle_center.x;

				if (right_half && mask_coord_interp.t < circle_center.y + circle_radius_outer) {
				mask = smoothstep(circle_center.y + circle_radius_inner,
				circle_center.y + circle_radius_outer,
				mask_coord_interp.t);
				}
				if (lower_half && mask_coord_interp.s > circle_center.x - circle_radius_outer) {
				mask = smoothstep(circle_center.x - circle_radius_inner,
				circle_center.x - circle_radius_outer,
				mask_coord_interp.s);
				}

				fragColor = mix(vec4(0.0), fragColor, max(mask_transparency, mask));
				}