// Weighted blended OIT by McGuire and Bavoil
#version 450

#include "compiled.inc"

uniform sampler2D gbuffer0; // accum
uniform sampler2D gbuffer1; // revealage

uniform vec2 texSize;

in vec2 texCoord;
out vec4 fragColor;

void main() {
	vec4 accum = texelFetch(gbuffer0, ivec2(texCoord * texSize), 0);
	float revealage = 1.0 - accum.a;

	// Save the blending and color texture fetch cost
	if (revealage == 0.0) {
		discard;
	}
	
	float f = texelFetch(gbuffer1, ivec2(texCoord * texSize), 0).r;
	fragColor = vec4(accum.rgb / clamp(f, 0.0001, 5000), revealage);
}