initial commit, 4.5 stable

servers/rendering/renderer_rd/shaders/effects/smaa_edge_detection.glsl

@@ -0,0 +1,120 @@
+/**
+ * Copyright (C) 2013 Jorge Jimenez (jorge@iryoku.com)
+ * Copyright (C) 2013 Jose I. Echevarria (joseignacioechevarria@gmail.com)
+ * Copyright (C) 2013 Belen Masia (bmasia@unizar.es)
+ * Copyright (C) 2013 Fernando Navarro (fernandn@microsoft.com)
+ * Copyright (C) 2013 Diego Gutierrez (diegog@unizar.es)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to
+ * do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software. As clarification, there
+ * is no requirement that the copyright notice and permission be included in
+ * binary distributions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#[vertex]
+#version 450
+
+layout(location = 0) out vec2 tex_coord;
+layout(location = 1) out vec4 offset[3];
+
+layout(push_constant, std430) uniform Params {
+	vec2 inv_size;
+	float threshold;
+	float reserved;
+}
+params;
+
+void main() {
+	vec2 vertex_base;
+	if (gl_VertexIndex == 0) {
+		vertex_base = vec2(-1.0, -1.0);
+	} else if (gl_VertexIndex == 1) {
+		vertex_base = vec2(-1.0, 3.0);
+	} else {
+		vertex_base = vec2(3.0, -1.0);
+	}
+	gl_Position = vec4(vertex_base, 0.0, 1.0);
+	tex_coord = clamp(vertex_base, vec2(0.0, 0.0), vec2(1.0, 1.0)) * 2.0; // saturate(x) * 2.0
+
+	offset[0] = fma(params.inv_size.xyxy, vec4(-1.0, 0.0, 0.0, -1.0), tex_coord.xyxy);
+	offset[1] = fma(params.inv_size.xyxy, vec4(1.0, 0.0, 0.0, 1.0), tex_coord.xyxy);
+	offset[2] = fma(params.inv_size.xyxy, vec4(-2.0, 0.0, 0.0, -2.0), tex_coord.xyxy);
+}
+
+#[fragment]
+#version 450
+
+layout(location = 0) in vec2 tex_coord;
+layout(location = 1) in vec4 offset[3];
+
+layout(set = 0, binding = 0) uniform sampler2D color_tex;
+
+layout(location = 0) out vec2 edges;
+
+layout(push_constant, std430) uniform Params {
+	vec2 inv_size;
+	float threshold;
+	float reserved;
+}
+params;
+
+#define SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR 2.0
+
+void main() {
+	vec2 threshold = vec2(params.threshold);
+
+	vec4 delta;
+	vec3 C = texture(color_tex, tex_coord).rgb;
+
+	vec3 Cleft = texture(color_tex, offset[0].xy).rgb;
+	vec3 t = abs(C - Cleft);
+	delta.x = max(max(t.r, t.g), t.b);
+
+	vec3 Ctop = texture(color_tex, offset[0].zw).rgb;
+	t = abs(C - Ctop);
+	delta.y = max(max(t.r, t.g), t.b);
+
+	edges = step(threshold, delta.xy);
+
+	if (dot(edges, vec2(1.0, 1.0)) == 0.0) {
+		discard;
+	}
+
+	vec3 Cright = texture(color_tex, offset[1].xy).rgb;
+	t = abs(C - Cright);
+	delta.z = max(max(t.r, t.g), t.b);
+
+	vec3 Cbottom = texture(color_tex, offset[1].zw).rgb;
+	t = abs(C - Cbottom);
+	delta.w = max(max(t.r, t.g), t.b);
+
+	vec2 max_delta = max(delta.xy, delta.zw);
+
+	vec3 Cleftleft = texture(color_tex, offset[2].xy).rgb;
+	t = abs(Cleft - Cleftleft);
+	delta.z = max(max(t.r, t.g), t.b);
+
+	vec3 Ctoptop = texture(color_tex, offset[2].zw).rgb;
+	t = abs(Ctop - Ctoptop);
+	delta.w = max(max(t.r, t.g), t.b);
+
+	max_delta = max(max_delta.xy, delta.zw);
+	float final_delta = max(max_delta.x, max_delta.y);
+
+	edges.xy *= step(final_delta, SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR * delta.xy);
+}