Lubos Lenco
124 lines
4.2 KiB
GLSL
124 lines
4.2 KiB
GLSL
#version 450
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// Copyright (C) 2013 Jorge Jimenez (jorge@iryoku.com)
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// Copyright (C) 2013 Jose I. Echevarria (joseignacioechevarria@gmail.com)
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// Copyright (C) 2013 Belen Masia (bmasia@unizar.es)
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// Copyright (C) 2013 Fernando Navarro (fernandn@microsoft.com)
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// Copyright (C) 2013 Diego Gutierrez (diegog@unizar.es)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to
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// do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software. As clarification, there
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// is no requirement that the copyright notice and permission be included in
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// binary distributions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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// http://www.iryoku.com/smaa/
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#define SMAA_THRESHOLD 0.1
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#define SMAA_DEPTH_THRESHOLD (0.1 * SMAA_THRESHOLD)
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#define SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR 2.0
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uniform sampler2D color_tex;
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in vec2 tex_coord;
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in vec4 offset0;
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in vec4 offset1;
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in vec4 offset2;
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out vec4 frag_color;
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vec2 smaa_luma_edge_detection_ps(vec2 texcoord) {
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vec2 threshold = vec2(SMAA_THRESHOLD, SMAA_THRESHOLD);
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vec3 weights = vec3(0.2126, 0.7152, 0.0722);
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float L = dot(textureLod(color_tex, texcoord, 0.0).rgb, weights);
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float Lleft = dot(textureLod(color_tex, offset0.xy, 0.0).rgb, weights);
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float Ltop = dot(textureLod(color_tex, offset0.zw, 0.0).rgb, weights);
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vec4 delta;
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delta.xy = abs(L - vec2(Lleft, Ltop));
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vec2 edges = step(threshold, delta.xy);
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if (dot(edges, vec2(1.0, 1.0)) == 0.0)
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discard;
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float Lright = dot(textureLod(color_tex, offset1.xy, 0.0).rgb, weights);
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float Lbottom = dot(textureLod(color_tex, offset1.zw, 0.0).rgb, weights);
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delta.zw = abs(L - vec2(Lright, Lbottom));
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vec2 max_delta = max(delta.xy, delta.zw);
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float Lleftleft = dot(textureLod(color_tex, offset2.xy, 0.0).rgb, weights);
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float Ltoptop = dot(textureLod(color_tex, offset2.zw, 0.0).rgb, weights);
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delta.zw = abs(vec2(Lleft, Ltop) - vec2(Lleftleft, Ltoptop));
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max_delta = max(max_delta.xy, delta.zw);
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float final_delta = max(max_delta.x, max_delta.y);
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edges.xy *= step(final_delta, SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR * delta.xy);
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return edges;
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}
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vec2 smaa_color_edge_detection_ps(vec2 texcoord) {
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vec2 threshold = vec2(SMAA_THRESHOLD, SMAA_THRESHOLD);
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vec4 delta;
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vec3 C = textureLod(color_tex, texcoord, 0.0).rgb;
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vec3 Cleft = textureLod(color_tex, offset0.xy, 0.0).rgb;
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vec3 t = abs(C - Cleft);
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delta.x = max(max(t.r, t.g), t.b);
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vec3 Ctop = textureLod(color_tex, offset0.zw, 0.0).rgb;
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t = abs(C - Ctop);
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delta.y = max(max(t.r, t.g), t.b);
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vec2 edges = step(threshold, delta.xy);
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if (dot(edges, vec2(1.0, 1.0)) == 0.0)
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discard;
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vec3 Cright = textureLod(color_tex, offset1.xy, 0.0).rgb;
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t = abs(C - Cright);
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delta.z = max(max(t.r, t.g), t.b);
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vec3 Cbottom = textureLod(color_tex, offset1.zw, 0.0).rgb;
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t = abs(C - Cbottom);
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delta.w = max(max(t.r, t.g), t.b);
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vec2 max_delta = max(delta.xy, delta.zw);
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vec3 Cleftleft = textureLod(color_tex, offset2.xy, 0.0).rgb;
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t = abs(C - Cleftleft);
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delta.z = max(max(t.r, t.g), t.b);
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vec3 Ctoptop = textureLod(color_tex, offset2.zw, 0.0).rgb;
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t = abs(C - Ctoptop);
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delta.w = max(max(t.r, t.g), t.b);
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max_delta = max(max_delta.xy, delta.zw);
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float final_delta = max(max_delta.x, max_delta.y);
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edges.xy *= step(final_delta, SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR * delta.xy);
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return edges;
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}
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void main() {
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frag_color.rg = smaa_color_edge_detection_ps(tex_coord);
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}
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