src/cobalt/renderer/glimp_shaders/glsl/fragment_skia_circular_rrect_masked_rect_blur.glsl

#version 100
precision mediump float;
uniform sampler2D uSampler0_Stage0;
uniform vec4 uproxyRect_Stage0;
uniform float uprofileSize_Stage0;
uniform float uRTHeight;
uniform vec4 uinnerRect_Stage1;
uniform float uradiusPlusHalf_Stage1;
varying vec4 vColor;
void main() 
{
	vec4 fragCoordYDown = vec4(gl_FragCoord.x, uRTHeight - gl_FragCoord.y, 1.0, 1.0);
	vec4 output_Stage0;
	{
		// Stage 0: RectBlur
		vec4 src=vColor;
		vec2 translatedPos = fragCoordYDown.xy - uproxyRect_Stage0.xy;
		float width = uproxyRect_Stage0.z - uproxyRect_Stage0.x;
		float height = uproxyRect_Stage0.w - uproxyRect_Stage0.y;
		vec2 smallDims = vec2(width - uprofileSize_Stage0, height-uprofileSize_Stage0);
		float center = 2.0 * floor(uprofileSize_Stage0/2.0 + .25) - 1.0;
		vec2 wh = smallDims - vec2(center,center);
		float horiz_lookup;
		{
			float coord = (0.5 * (abs(2.0*translatedPos.x - width) - wh.x))/uprofileSize_Stage0;
			horiz_lookup = texture2D(uSampler0_Stage0, vec2(coord,0.5)).aaaa.a;
		}
		float vert_lookup;
		{
			float coord = (0.5 * (abs(2.0*translatedPos.y - height) - wh.y))/uprofileSize_Stage0;
			vert_lookup = texture2D(uSampler0_Stage0, vec2(coord,0.5)).aaaa.a;
		}
		float final = horiz_lookup * vert_lookup;
		output_Stage0 = src * vec4(final);
	}
	vec4 output_Stage1;
	{
		// Stage 1: CircularRRect
		vec2 dxy0 = uinnerRect_Stage1.xy - fragCoordYDown.xy;
		vec2 dxy1 = fragCoordYDown.xy - uinnerRect_Stage1.zw;
		vec2 dxy = max(max(dxy0, dxy1), 0.0);
		float alpha = clamp(uradiusPlusHalf_Stage1 - length(dxy), 0.0, 1.0);
		alpha = 1.0 - alpha;
		output_Stage1 = (output_Stage0 * alpha);
	}
	gl_FragColor = output_Stage1;
}