53 lines
1.3 KiB
GLSL
53 lines
1.3 KiB
GLSL
#version 450
|
|
|
|
layout(location = 0) in vec2 inUV;
|
|
layout(location = 0) out vec4 outColor;
|
|
|
|
layout(set = 0, binding = 0) uniform sampler2D uColor;
|
|
|
|
layout(push_constant) uniform Push
|
|
{
|
|
float inverse_width;
|
|
float inverse_height;
|
|
float edge_threshold;
|
|
float edge_threshold_min;
|
|
} pc;
|
|
|
|
float luma(vec3 c)
|
|
{
|
|
return dot(c, vec3(0.299, 0.587, 0.114));
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec2 texel = vec2(pc.inverse_width, pc.inverse_height);
|
|
|
|
vec3 cM = texture(uColor, inUV).rgb;
|
|
vec3 cN = texture(uColor, inUV + vec2(0.0, texel.y)).rgb;
|
|
vec3 cS = texture(uColor, inUV + vec2(0.0, -texel.y)).rgb;
|
|
vec3 cE = texture(uColor, inUV + vec2( texel.x, 0.0)).rgb;
|
|
vec3 cW = texture(uColor, inUV + vec2(-texel.x, 0.0)).rgb;
|
|
|
|
float lM = luma(cM);
|
|
float lN = luma(cN);
|
|
float lS = luma(cS);
|
|
float lE = luma(cE);
|
|
float lW = luma(cW);
|
|
|
|
float lMin = min(lM, min(min(lN, lS), min(lE, lW)));
|
|
float lMax = max(lM, max(max(lN, lS), max(lE, lW)));
|
|
float lRange = lMax - lMin;
|
|
|
|
float threshold = max(pc.edge_threshold_min, pc.edge_threshold * lMax);
|
|
if (lRange < threshold)
|
|
{
|
|
outColor = vec4(cM, 1.0);
|
|
return;
|
|
}
|
|
|
|
// Simple 5-tap cross blur when we detect an edge.
|
|
vec3 avg = (cM + cN + cS + cE + cW) * 0.2;
|
|
outColor = vec4(avg, 1.0);
|
|
}
|
|
|