1 files changed, 63 insertions, 0 deletions
diff --git a/sway/desktop/shaders/tex_decorated.frag b/sway/desktop/shaders/tex_decorated.frag
new file mode 100644
index 00000000..40320f9b
--- /dev/null
+++ b/sway/desktop/shaders/tex_decorated.frag
@@ -0,0 +1,63 @@
+/* enum wlr_gles2_shader_source */
+#define SOURCE_TEXTURE_RGBA 1
+#define SOURCE_TEXTURE_RGBX 2
+#define SOURCE_TEXTURE_EXTERNAL 3
+
+#if !defined(SOURCE)
+#error "Missing shader preamble"
+#endif
+
+#if SOURCE == SOURCE_TEXTURE_EXTERNAL
+#extension GL_OES_EGL_image_external : require
+#endif
+
+precision mediump float;
+
+varying vec2 v_texcoord;
+
+#if SOURCE == SOURCE_TEXTURE_EXTERNAL
+uniform samplerExternalOES tex;
+#elif SOURCE == SOURCE_TEXTURE_RGBA || SOURCE == SOURCE_TEXTURE_RGBX
+uniform sampler2D tex;
+#endif
+
+uniform float alpha;
+uniform float dim;
+uniform vec4 dim_color;
+uniform vec2 size;
+uniform vec2 position;
+uniform float radius;
+uniform bool has_titlebar;
+uniform float saturation;
+
+const vec3 saturation_weight = vec3(0.2125, 0.7154, 0.0721);
+
+vec4 sample_texture() {
+#if SOURCE == SOURCE_TEXTURE_RGBA || SOURCE == SOURCE_TEXTURE_EXTERNAL
+    return texture2D(tex, v_texcoord);
+#elif SOURCE == SOURCE_TEXTURE_RGBX
+    return vec4(texture2D(tex, v_texcoord).rgb, 1.0);
+#endif
+}
+
+void main() {
+    vec4 color = sample_texture();
+    // Saturation
+    if (saturation != 1.0) {
+        vec4 pixColor = texture2D(tex, v_texcoord);
+        vec3 irgb = pixColor.rgb;
+        vec3 target = vec3(dot(irgb, saturation_weight));
+        color = vec4(mix(target, irgb, saturation), pixColor.a);
+    }
+    // Dimming
+    gl_FragColor = mix(color, dim_color, dim) * alpha;
+
+    if (!has_titlebar || gl_FragCoord.y - position.y > radius) {
+        vec2 corner_distance = min(gl_FragCoord.xy - position, size + position - gl_FragCoord.xy);
+        if (max(corner_distance.x, corner_distance.y) < radius) {
+            float d = radius - distance(corner_distance, vec2(radius));
+            float smooth = smoothstep(-1.0f, 0.5f, d);
+            gl_FragColor = mix(vec4(0), gl_FragColor, smooth);
+        }
+    }
+}