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///////////////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2017 - Brad Parker //
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// //
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// This program is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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// //
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///////////////////////////////////////////////////////////////////////////
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#if defined(VERTEX)
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////////////////////////////////////////////////////////////////////////////////
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// Vertex shader //
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////////////////////////////////////////////////////////////////////////////////
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#if __VERSION__ >= 130
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#define COMPAT_VARYING out
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#define COMPAT_ATTRIBUTE in
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#define COMPAT_TEXTURE texture
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#else
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#define COMPAT_VARYING varying
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#define COMPAT_ATTRIBUTE attribute
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#define COMPAT_TEXTURE texture2D
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#endif
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#ifdef GL_ES
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#define COMPAT_PRECISION mediump
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#else
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#define COMPAT_PRECISION
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#endif
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COMPAT_ATTRIBUTE vec4 VertexCoord;
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COMPAT_ATTRIBUTE vec4 COLOR;
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COMPAT_ATTRIBUTE vec4 TexCoord;
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COMPAT_VARYING vec4 COL0;
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COMPAT_VARYING vec4 TEX0;
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COMPAT_VARYING vec2 dot_size;
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COMPAT_VARYING vec2 one_texel;
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uniform mat4 MVPMatrix;
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uniform COMPAT_PRECISION int FrameDirection;
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uniform COMPAT_PRECISION int FrameCount;
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uniform COMPAT_PRECISION vec2 OutputSize;
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uniform COMPAT_PRECISION vec2 TextureSize;
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uniform COMPAT_PRECISION vec2 InputSize;
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////////////////////////////////////////////////////////////////////////////////
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// Vertex definitions //
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////////////////////////////////////////////////////////////////////////////////
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#define vTexCoord TEX0.xy
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#define SourceSize vec4(TextureSize, 1.0 / TextureSize) //either TextureSize or InputSize
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#define outsize vec4(OutputSize, 1.0 / OutputSize)
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// Largest integer scale of input video that will fit in the current output (y axis would typically be limiting on widescreens)
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#define video_scale floor(outsize.y * SourceSize.w)
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// Size of the scaled video
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//#define scaled_video_out (SourceSize.xy * vec2(video_scale))
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//it's... half a pixel
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#define half_pixel (vec2(0.5) * outsize.zw)
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void main()
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{
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vec2 scaled_video_out = (InputSize.xy * vec2(video_scale));
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// Remaps position to integer scaled output
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gl_Position = MVPMatrix * VertexCoord;// / vec4( vec2(outsize.xy / scaled_video_out), 1.0, 1.0 );
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TEX0.xy = TexCoord.xy;// + vec2(0.0, half_pixel);
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dot_size = SourceSize.zw;
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one_texel = 1.0 / (SourceSize.xy * video_scale);
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}
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#elif defined(FRAGMENT)
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////////////////////////////////////////////////////////////////////////////////
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// Fragment shader //
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////////////////////////////////////////////////////////////////////////////////
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#if __VERSION__ >= 130
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#define COMPAT_VARYING in
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#define COMPAT_TEXTURE texture
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out vec4 FragColor;
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#else
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#define COMPAT_VARYING varying
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#define FragColor gl_FragColor
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#define COMPAT_TEXTURE texture2D
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#endif
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#ifdef GL_ES
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#ifdef GL_FRAGMENT_PRECISION_HIGH
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precision highp float;
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#else
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precision mediump float;
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#endif
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#define COMPAT_PRECISION mediump
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#else
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#define COMPAT_PRECISION
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#endif
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uniform COMPAT_PRECISION int FrameDirection;
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uniform COMPAT_PRECISION int FrameCount;
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uniform COMPAT_PRECISION vec2 OutputSize;
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uniform COMPAT_PRECISION vec2 TextureSize;
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uniform COMPAT_PRECISION vec2 InputSize;
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uniform sampler2D Texture;
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uniform sampler2D MASK;
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COMPAT_VARYING vec4 TEX0;
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COMPAT_VARYING vec2 dot_size;
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COMPAT_VARYING vec2 one_texel;
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// compatibility #defines
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#define Source Texture
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#define vTexCoord TEX0.xy
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#define SourceSize vec4(TextureSize, 1.0 / TextureSize) //either TextureSize or InputSize
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#define outsize vec4(OutputSize, 1.0 / OutputSize)
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#define maskSize vec2(2., floor(outsize.y / InputSize.y + 0.000001))
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////////////////////////////////////////////////////////////////////////////////
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//fragment definitions //
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////////////////////////////////////////////////////////////////////////////////
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#define curr_rgb COMPAT_TEXTURE(Source, vTexCoord)
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#define mask_rgb COMPAT_TEXTURE(MASK, fract(gl_FragCoord.xy / maskSize))
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void main()
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{
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FragColor = mask_rgb * curr_rgb;
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}
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#endif
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