mirror of
https://github.com/italicsjenga/slang-shaders.git
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119 lines
4.2 KiB
Plaintext
119 lines
4.2 KiB
Plaintext
#version 450
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/* Ported by Hyllian and hunterk - 2015 / 2017 */
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// Copyright (c) 2015-2017, bacondither
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer
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// in this position and unchanged.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// First pass, MUST BE PLACED IMMEDIATELY BEFORE THE SECOND PASS IN THE CHAIN
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// Adaptive sharpen - version 2017-04-11 - (requires ps >= 3.0)
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// Tuned for use post-resize, EXPECTS FULL RANGE GAMMA LIGHT
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// Compatibility defines:
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#define mul(a,b) (b*a)
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#define saturate(c) clamp(c, 0.0, 1.0)
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//-------------------------------------------------------------------------------------------------
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#define w_offset 1.0 // Edge channel offset, must be the same in all passes
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//-------------------------------------------------------------------------------------------------
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// Get destination pixel values
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#define get(x,y) ( saturate(texture(Source, coord + vec2(x*(px), y*(py))).rgb) )
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// Component-wise distance
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#define b_diff(pix) ( abs(blur - c[pix]) )
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layout(push_constant) uniform Push
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{
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vec4 SourceSize;
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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} params;
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layout(std140, set = 0, binding = 0) uniform UBO
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{
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mat4 MVP;
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} global;
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#pragma stage vertex
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layout(location = 0) in vec4 Position;
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layout(location = 1) in vec2 TexCoord;
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layout(location = 0) out vec2 vTexCoord;
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void main()
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{
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gl_Position = global.MVP * Position;
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vTexCoord = TexCoord;
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}
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#pragma stage fragment
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layout(location = 0) in vec2 vTexCoord;
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layout(location = 0) out vec4 FragColor;
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layout(set = 0, binding = 2) uniform sampler2D Source;
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vec4 frag_op(sampler2D Source, vec2 coord, float px, float py)
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{
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// Get points and clip out of range values (BTB & WTW)
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// [ c9 ]
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// [ c1, c2, c3 ]
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// [ c10, c4, c0, c5, c11 ]
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// [ c6, c7, c8 ]
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// [ c12 ]
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vec3 c[13] = { get( 0, 0), get(-1,-1), get( 0,-1), get( 1,-1), get(-1, 0),
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get( 1, 0), get(-1, 1), get( 0, 1), get( 1, 1), get( 0,-2),
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get(-2, 0), get( 2, 0), get( 0, 2) };
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// Blur, gauss 3x3
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vec3 blur = (2.*(c[2]+c[4]+c[5]+c[7]) + (c[1]+c[3]+c[6]+c[8]) + 4.*c[0])/16.;
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float blur_Y = (blur.r/3. + blur.g/3. + blur.b/3.);
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// Contrast compression, center = 0.5, scaled to 1/3
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float c_comp = saturate(0.266666681 + 0.9*exp2(-7.4*blur_Y));
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// Edge detection
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// Relative matrix weights
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// [ 1, ]
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// [ 4, 5, 4 ]
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// [ 1, 5, 6, 5, 1 ]
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// [ 4, 5, 4 ]
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// [ 1 ]
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float edge = length( 1.38*(b_diff(0))
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+ 1.15*(b_diff(2) + b_diff(4) + b_diff(5) + b_diff(7))
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+ 0.92*(b_diff(1) + b_diff(3) + b_diff(6) + b_diff(8))
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+ 0.23*(b_diff(9) + b_diff(10) + b_diff(11) + b_diff(12)) );
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return vec4( (texture(Source, coord).rgb), (edge*c_comp + w_offset) );
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}
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void main()
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{
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vec2 tex = vTexCoord;
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float px = 1.0 / params.SourceSize.x;
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float py = 1.0 / params.SourceSize.y;
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FragColor = vec4(frag_op(Source, tex, px, py));
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} |