208 lines
7.4 KiB
GLSL
208 lines
7.4 KiB
GLSL
/**
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* _______ ___ ___ ___ ___
|
|
* / || \/ | / \ / \
|
|
* | (---- | \ / | / ^ \ / ^ \
|
|
* \ \ | |\/| | / /_\ \ / /_\ \
|
|
* ----) | | | | | / _____ \ / _____ \
|
|
* |_______/ |__| |__| /__/ \__\ /__/ \__\
|
|
*
|
|
* E N H A N C E D
|
|
* S U B P I X E L M O R P H O L O G I C A L A N T I A L I A S I N G
|
|
*
|
|
* http://www.iryoku.com/smaa/
|
|
*/
|
|
#version 450
|
|
|
|
#define SMAA_THRESHOLD 0.1
|
|
#define SMAA_DEPTH_THRESHOLD (0.1 * SMAA_THRESHOLD) // For depth edge detection, depends on the depth range of the scene
|
|
#define SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR 2.0
|
|
|
|
uniform sampler2D colorTex;
|
|
|
|
in vec2 texCoord;
|
|
in vec4 offset0;
|
|
in vec4 offset1;
|
|
in vec4 offset2;
|
|
out vec4 fragColor;
|
|
|
|
// Misc functions
|
|
// Gathers current pixel, and the top-left neighbors.
|
|
// vec3 SMAAGatherNeighbours(vec2 texcoord/*, vec4 offset[3], sampler2D tex*/) {
|
|
// float P = textureLod(tex, texcoord, 0.0).r;
|
|
// float Pleft = textureLod(tex, offset0.xy, 0.0).r;
|
|
// float Ptop = textureLod(tex, offset0.zw, 0.0).r;
|
|
// return vec3(P, Pleft, Ptop);
|
|
// }
|
|
|
|
// Edge Detection Pixel Shaders (First Pass)
|
|
// Adjusts the threshold by means of predication.
|
|
// vec2 SMAACalculatePredicatedThreshold(vec2 texcoord, vec4 offset[3], sampler2D predicationTex) {
|
|
// vec3 neighbours = SMAAGatherNeighbours(texcoord, offset, predicationTex);
|
|
// vec2 delta = abs(neighbours.xx - neighbours.yz);
|
|
// vec2 edges = step(SMAA_PREDICATION_THRESHOLD, delta);
|
|
// return SMAA_PREDICATION_SCALE * SMAA_THRESHOLD * (1.0 - SMAA_PREDICATION_STRENGTH * edges);
|
|
// }
|
|
|
|
// Luma Edge Detection
|
|
// IMPORTANT NOTICE: luma edge detection requires gamma-corrected colors, and
|
|
// thus 'colorTex' should be a non-sRGB texture.
|
|
vec2 SMAALumaEdgeDetectionPS(vec2 texcoord
|
|
//#if SMAA_PREDICATION
|
|
//, sampler2D predicationTex
|
|
//#endif
|
|
) {
|
|
// Calculate the threshold:
|
|
//#if SMAA_PREDICATION
|
|
//vec2 threshold = SMAACalculatePredicatedThreshold(texcoord, offset, SMAATexturePass2D(predicationTex));
|
|
//#else
|
|
vec2 threshold = vec2(SMAA_THRESHOLD, SMAA_THRESHOLD);
|
|
//#endif
|
|
|
|
// Calculate lumas:
|
|
vec3 weights = vec3(0.2126, 0.7152, 0.0722);
|
|
float L = dot(textureLod(colorTex, texcoord, 0.0).rgb, weights);
|
|
|
|
float Lleft = dot(textureLod(colorTex, offset0.xy, 0.0).rgb, weights);
|
|
float Ltop = dot(textureLod(colorTex, offset0.zw, 0.0).rgb, weights);
|
|
|
|
// We do the usual threshold:
|
|
vec4 delta;
|
|
delta.xy = abs(L - vec2(Lleft, Ltop));
|
|
vec2 edges = step(threshold, delta.xy);
|
|
|
|
// Then discard if there is no edge:
|
|
if (dot(edges, vec2(1.0, 1.0)) == 0.0)
|
|
discard;
|
|
|
|
// Calculate right and bottom deltas:
|
|
float Lright = dot(textureLod(colorTex, offset1.xy, 0.0).rgb, weights);
|
|
float Lbottom = dot(textureLod(colorTex, offset1.zw, 0.0).rgb, weights);
|
|
delta.zw = abs(L - vec2(Lright, Lbottom));
|
|
|
|
// Calculate the maximum delta in the direct neighborhood:
|
|
vec2 maxDelta = max(delta.xy, delta.zw);
|
|
|
|
// Calculate left-left and top-top deltas:
|
|
float Lleftleft = dot(textureLod(colorTex, offset2.xy, 0.0).rgb, weights);
|
|
float Ltoptop = dot(textureLod(colorTex, offset2.zw, 0.0).rgb, weights);
|
|
delta.zw = abs(vec2(Lleft, Ltop) - vec2(Lleftleft, Ltoptop));
|
|
|
|
// Calculate the final maximum delta:
|
|
maxDelta = max(maxDelta.xy, delta.zw);
|
|
float finalDelta = max(maxDelta.x, maxDelta.y);
|
|
|
|
// Local contrast adaptation:
|
|
edges.xy *= step(finalDelta, SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR * delta.xy);
|
|
|
|
return edges;
|
|
}
|
|
|
|
// Color Edge Detection
|
|
// IMPORTANT NOTICE: color edge detection requires gamma-corrected colors, and
|
|
// thus 'colorTex' should be a non-sRGB texture.
|
|
vec2 SMAAColorEdgeDetectionPS(vec2 texcoord
|
|
//#if SMAA_PREDICATION
|
|
//, sampler2D predicationTex
|
|
//#endif
|
|
) {
|
|
// Calculate the threshold:
|
|
//#if SMAA_PREDICATION
|
|
//vec2 threshold = SMAACalculatePredicatedThreshold(texcoord, offset, predicationTex);
|
|
//#else
|
|
vec2 threshold = vec2(SMAA_THRESHOLD, SMAA_THRESHOLD);
|
|
//#endif
|
|
|
|
// Calculate color deltas:
|
|
vec4 delta;
|
|
vec3 C = textureLod(colorTex, texcoord, 0.0).rgb;
|
|
|
|
vec3 Cleft = textureLod(colorTex, offset0.xy, 0.0).rgb;
|
|
vec3 t = abs(C - Cleft);
|
|
delta.x = max(max(t.r, t.g), t.b);
|
|
|
|
vec3 Ctop = textureLod(colorTex, offset0.zw, 0.0).rgb;
|
|
t = abs(C - Ctop);
|
|
delta.y = max(max(t.r, t.g), t.b);
|
|
|
|
// We do the usual threshold:
|
|
vec2 edges = step(threshold, delta.xy);
|
|
|
|
// Then discard if there is no edge:
|
|
if (dot(edges, vec2(1.0, 1.0)) == 0.0)
|
|
discard;
|
|
|
|
// Calculate right and bottom deltas:
|
|
vec3 Cright = textureLod(colorTex, offset1.xy, 0.0).rgb;
|
|
t = abs(C - Cright);
|
|
delta.z = max(max(t.r, t.g), t.b);
|
|
|
|
vec3 Cbottom = textureLod(colorTex, offset1.zw, 0.0).rgb;
|
|
t = abs(C - Cbottom);
|
|
delta.w = max(max(t.r, t.g), t.b);
|
|
|
|
// Calculate the maximum delta in the direct neighborhood:
|
|
vec2 maxDelta = max(delta.xy, delta.zw);
|
|
|
|
// Calculate left-left and top-top deltas:
|
|
vec3 Cleftleft = textureLod(colorTex, offset2.xy, 0.0).rgb;
|
|
t = abs(C - Cleftleft);
|
|
delta.z = max(max(t.r, t.g), t.b);
|
|
|
|
vec3 Ctoptop = textureLod(colorTex, offset2.zw, 0.0).rgb;
|
|
t = abs(C - Ctoptop);
|
|
delta.w = max(max(t.r, t.g), t.b);
|
|
|
|
// Calculate the final maximum delta:
|
|
maxDelta = max(maxDelta.xy, delta.zw);
|
|
float finalDelta = max(maxDelta.x, maxDelta.y);
|
|
|
|
// Local contrast adaptation:
|
|
edges.xy *= step(finalDelta, SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR * delta.xy);
|
|
|
|
return edges;
|
|
}
|
|
|
|
// Depth Edge Detection
|
|
// vec2 SMAADepthEdgeDetectionPS(vec2 texcoord, /*vec4 offset[3],*/ sampler2D depthTex) {
|
|
// vec3 neighbours = SMAAGatherNeighbours(texcoord, /*offset,*/ depthTex);
|
|
// vec2 delta = abs(neighbours.xx - vec2(neighbours.y, neighbours.z));
|
|
// vec2 edges = step(SMAA_DEPTH_THRESHOLD, delta);
|
|
|
|
// if (dot(edges, vec2(1.0, 1.0)) == 0.0)
|
|
// discard;
|
|
|
|
// return edges;
|
|
// }
|
|
|
|
void main() {
|
|
fragColor.rg = SMAAColorEdgeDetectionPS(texCoord);
|
|
}
|