Added grayscale

gui/dot-config/hypr/shaders/grayscale-custom.glsl

@@ -0,0 +1,23 @@
+#version 300 es
+
+precision highp float;
+
+in vec2 v_texcoord;
+uniform sampler2D tex;
+out vec4 fragColor;
+
+void main() {
+	vec4 pixColor = texture(tex, v_texcoord);
+	float gray = 0.0;
+
+	// Get gray with luminosity and hdr
+	// https://en.wikipedia.org/wiki/Grayscale#Luma_coding_in_video_systems
+	gray = dot(pixColor.rgb, vec3(0.2627, 0.6780, 0.0593));
+
+	// Change contrast
+	float contrast = 0.95; 
+	gray = (gray - 0.5) * contrast + 0.5;
+	gray = clamp(gray, 0.0, 1.0);
+
+	fragColor = vec4(vec3(gray), pixColor.a);
+}