quakeforge/libs/video/renderer/vulkan/shader/quakebsp.frag

#version 450
#extension GL_GOOGLE_include_directive : enable

#include "fog.finc"

layout (set = 3, binding = 0) uniform sampler2DArray Texture;
layout (set = 4, binding = 0) uniform sampler2D Lightmap;

layout (push_constant) uniform PushConstants {
	vec4        fog;
	float       time;
	float       alpha;
};

layout (location = 0) in vec4 tl_st;
layout (location = 1) in vec3 direction;
layout (location = 2) in vec3 normal;
layout (location = 3) in vec4 position;
layout (location = 4) in vec4 color;

layout (location = 0) out vec4 frag_color;

void
main (void)
{
	vec3        t_st = vec3 (tl_st.xy, 0);
	vec3        e_st = vec3 (tl_st.xy, 1);
	vec2        l_st = vec2 (tl_st.zw);

	vec4        c = texture (Texture, t_st) * color;
	vec4        e = texture (Texture, e_st);
	vec4        l = texture (Lightmap, l_st);

	frag_color = FogBlend (c * l + e, fog);
}