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out vec4 FragColor;
uniform sampler2D wireColor;
uniform sampler2D wireDepth;
uniform sampler2D faceColor;
uniform sampler2D sceneDepth;
uniform float alpha;
vec4 linear(vec4 col)
{
const float fac = 0.45454545;
return vec4(pow(col.r,fac), pow(col.g,fac), pow(col.b,fac), col.a);
}
vec4 srgb(vec4 col)
{
const float fac = 2.2;
return vec4(pow(col.r,fac), pow(col.g,fac), pow(col.b,fac), col.a);
}
void main()
{
ivec2 co = ivec2(gl_FragCoord.xy);
float wire_depth = texelFetch(wireDepth, co, 0).r;
float scene_depth = texelFetch(sceneDepth, co, 0).r;
vec4 wire_color = texelFetch(wireColor, co, 0).rgba;
vec4 face_color = texelFetch(faceColor, co, 0).rgba;
/* this works because not rendered depth is 1.0 and the
* following test is always true even when no wires */
if (wire_depth > scene_depth) {
wire_color.a *= alpha;
FragColor.rgb = mix(face_color.rgb, wire_color.rgb, wire_color.a);
FragColor.a = face_color.a + wire_color.a;
}
else {
FragColor = wire_color;
}
}
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