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https://github.com/italicsjenga/slang-shaders.git
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127 lines
4.3 KiB
Plaintext
127 lines
4.3 KiB
Plaintext
#version 450
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/*
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Hyllian's CRT Shader - pass1
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Copyright (C) 2011-2016 Hyllian - sergiogdb@gmail.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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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.
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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
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THE SOFTWARE.
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*/
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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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float OutputGamma;
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float PHOSPHOR;
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float COLOR_BOOST;
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float RED_BOOST;
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float GREEN_BOOST;
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float BLUE_BOOST;
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float SCANLINES_STRENGTH;
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float BEAM_MIN_WIDTH;
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float BEAM_MAX_WIDTH;
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} params;
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#pragma parameter OutputGamma "CRT - Output Gamma" 2.2 0.0 5.0 0.1
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#pragma parameter PHOSPHOR "CRT - Phosphor ON/OFF" 1.0 0.0 1.0 1.0
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#pragma parameter COLOR_BOOST "CRT - Color Boost" 1.5 1.0 2.0 0.05
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#pragma parameter RED_BOOST "CRT - Red Boost" 1.0 1.0 2.0 0.01
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#pragma parameter GREEN_BOOST "CRT - Green Boost" 1.0 1.0 2.0 0.01
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#pragma parameter BLUE_BOOST "CRT - Blue Boost" 1.0 1.0 2.0 0.01
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#pragma parameter SCANLINES_STRENGTH "CRT - Scanline Strength" 0.72 0.0 1.0 0.02
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#pragma parameter BEAM_MIN_WIDTH "CRT - Min Beam Width" 0.86 0.0 1.0 0.02
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#pragma parameter BEAM_MAX_WIDTH "CRT - Max Beam Width" 1.0 0.0 1.0 0.02
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#define OutputGamma params.OutputGamma
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#define PHOSPHOR params.PHOSPHOR
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#define COLOR_BOOST params.COLOR_BOOST
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#define RED_BOOST params.RED_BOOST
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#define GREEN_BOOST params.GREEN_BOOST
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#define BLUE_BOOST params.BLUE_BOOST
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#define SCANLINES_STRENGTH params.SCANLINES_STRENGTH
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#define BEAM_MIN_WIDTH params.BEAM_MIN_WIDTH
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#define BEAM_MAX_WIDTH params.BEAM_MAX_WIDTH
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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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#define GAMMA_OUT(color) pow(color, vec3(1.0 / OutputGamma, 1.0 / OutputGamma, 1.0 / OutputGamma))
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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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void main()
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{
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vec2 texture_size = params.SourceSize.xy;
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vec3 color;
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vec2 dx = vec2(1.0/texture_size.x, 0.0);
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vec2 dy = vec2(0.0, 1.0/texture_size.y);
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vec2 pix_coord = vTexCoord*texture_size+vec2(0.0,0.5);
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vec2 tc = (floor(pix_coord)+vec2(0.0,0.5))/texture_size;
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vec2 fp = fract(pix_coord);
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vec3 color0 = texture(Source, tc - dy).xyz;
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vec3 color1 = texture(Source, tc ).xyz;
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float pos0 = fp.y;
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float pos1 = 1 - fp.y;
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vec3 lum0 = mix(vec3(BEAM_MIN_WIDTH), vec3(BEAM_MAX_WIDTH), color0);
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vec3 lum1 = mix(vec3(BEAM_MIN_WIDTH), vec3(BEAM_MAX_WIDTH), color1);
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vec3 d0 = clamp(pos0/(lum0+0.0000001), 0.0, 1.0);
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vec3 d1 = clamp(pos1/(lum1+0.0000001), 0.0, 1.0);
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d0 = exp(-10.0*SCANLINES_STRENGTH*d0*d0);
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d1 = exp(-10.0*SCANLINES_STRENGTH*d1*d1);
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color = clamp(color0*d0+color1*d1, 0.0, 1.0);
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color *= COLOR_BOOST*vec3(RED_BOOST, GREEN_BOOST, BLUE_BOOST);
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float mod_factor = vTexCoord.x * params.OutputSize.x;
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vec3 dotMaskWeights = mix(
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vec3(1.0, 0.7, 1.0),
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vec3(0.7, 1.0, 0.7),
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floor(mod(mod_factor, 2.0))
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);
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color.rgb *= mix(vec3(1.0, 1.0, 1.0), dotMaskWeights, PHOSPHOR);
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color = GAMMA_OUT(color);
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FragColor = vec4(color, 1.0);
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} |