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sonic3air-main/Oxygen/oxygenengine/data/shader/upscaler_xbrz-freescale-pass0.shader
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| // Hyllian's xBRZ freescale multipass shader | ||
| // - Adapted for use in Oxygen Engine | ||
| // Copyright (C) 2018-2024 Eukaryot | ||
| // | ||
| // This shader is derived from original "xbrz-freescale-pass0.glsl" from https://github.com/libretro/glsl-shaders/tree/master/xbrz/shaders/xbrz-freescale-multipass | ||
| // Used under GNU General Public License v2, see additional license info below. | ||
| // | ||
| // This file is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 2 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This file is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with the this software. If not, see <http://www.gnu.org/licenses/>. | ||
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| // xBRZ freescale | ||
| // based on : | ||
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| // 4xBRZ shader - Copyright (C) 2014-2016 DeSmuME team | ||
| // | ||
| // This file is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 2 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This file is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with the this software. If not, see <http://www.gnu.org/licenses/>. | ||
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| /* | ||
| Hyllian's xBR-vertex code and texel mapping | ||
| Copyright (C) 2011/2016 Hyllian - [email protected] | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of 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. | ||
| 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. | ||
| */ | ||
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| ## ----- Shared ------------------------------------------------------------------- | ||
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| #version 130 | ||
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| precision mediump float; | ||
| precision mediump int; | ||
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| ## ----- Vertex ------------------------------------------------------------------- | ||
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| in vec2 position; | ||
| out vec2 TEX0; | ||
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| void main() | ||
| { | ||
| gl_Position.x = position.x * 2.0 - 1.0; | ||
| gl_Position.y = position.y * 2.0 - 1.0; | ||
| gl_Position.z = 0.0; | ||
| gl_Position.w = 1.0; | ||
| TEX0.xy = position.xy * 1.0001; | ||
| } | ||
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| ## ----- Fragment ----------------------------------------------------------------- | ||
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| in vec2 TEX0; | ||
| out vec4 FragColor; | ||
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| uniform vec2 GameResolution; | ||
| uniform sampler2D Texture; | ||
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| #define SourceSize vec4(GameResolution, 1.0 / GameResolution) | ||
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| #define BLEND_NONE 0 | ||
| #define BLEND_NORMAL 1 | ||
| #define BLEND_DOMINANT 2 | ||
| #define LUMINANCE_WEIGHT 1.0 | ||
| #define EQUAL_COLOR_TOLERANCE 30.0/255.0 | ||
| #define STEEP_DIRECTION_THRESHOLD 2.2 | ||
| #define DOMINANT_DIRECTION_THRESHOLD 3.6 | ||
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| float DistYCbCr(vec3 pixA, vec3 pixB) | ||
| { | ||
| const vec3 w = vec3(0.2627, 0.6780, 0.0593); | ||
| const float scaleB = 0.5 / (1.0 - w.b); | ||
| const float scaleR = 0.5 / (1.0 - w.r); | ||
| vec3 diff = pixA - pixB; | ||
| float Y = dot(diff.rgb, w); | ||
| float Cb = scaleB * (diff.b - Y); | ||
| float Cr = scaleR * (diff.r - Y); | ||
| return sqrt(((LUMINANCE_WEIGHT * Y) * (LUMINANCE_WEIGHT * Y)) + (Cb * Cb) + (Cr * Cr)); | ||
| } | ||
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| bool IsPixEqual(const vec3 pixA, const vec3 pixB) | ||
| { | ||
| return (DistYCbCr(pixA, pixB) < EQUAL_COLOR_TOLERANCE); | ||
| } | ||
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| #define eq(a,b) (a == b) | ||
| #define neq(a,b) (a != b) | ||
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| #define P(x,y) texture(Texture, coord + SourceSize.zw * vec2(x, y)).rgb | ||
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| void main() | ||
| { | ||
| //--------------------------------------- | ||
| // Input Pixel Mapping: -|x|x|x|- | ||
| // x|A|B|C|x | ||
| // x|D|E|F|x | ||
| // x|G|H|I|x | ||
| // -|x|x|x|- | ||
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| vec2 pos = fract(TEX0.xy * SourceSize.xy) - vec2(0.5, 0.5); | ||
| vec2 coord = TEX0.xy - pos * SourceSize.zw; | ||
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| vec3 A = P(-1.,-1.); | ||
| vec3 B = P( 0.,-1.); | ||
| vec3 C = P( 1.,-1.); | ||
| vec3 D = P(-1., 0.); | ||
| vec3 E = P( 0., 0.); | ||
| vec3 F = P( 1., 0.); | ||
| vec3 G = P(-1., 1.); | ||
| vec3 H = P( 0., 1.); | ||
| vec3 I = P( 1., 1.); | ||
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| // blendResult Mapping: x|y| | ||
| // w|z| | ||
| ivec4 blendResult = ivec4(BLEND_NONE,BLEND_NONE,BLEND_NONE,BLEND_NONE); | ||
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| // Preprocess corners | ||
| // Pixel Tap Mapping: -|-|-|-|- | ||
| // -|-|B|C|- | ||
| // -|D|E|F|x | ||
| // -|G|H|I|x | ||
| // -|-|x|x|- | ||
| if (!((eq(E,F) && eq(H,I)) || (eq(E,H) && eq(F,I)))) | ||
| { | ||
| float dist_H_F = DistYCbCr(G, E) + DistYCbCr(E, C) + DistYCbCr(P(0.,2.), I) + DistYCbCr(I, P(2.,0.)) + (4.0 * DistYCbCr(H, F)); | ||
| float dist_E_I = DistYCbCr(D, H) + DistYCbCr(H, P(1.,2.)) + DistYCbCr(B, F) + DistYCbCr(F, P(2.,1.)) + (4.0 * DistYCbCr(E, I)); | ||
| bool dominantGradient = (DOMINANT_DIRECTION_THRESHOLD * dist_H_F) < dist_E_I; | ||
| blendResult.z = ((dist_H_F < dist_E_I) && neq(E,F) && neq(E,H)) ? ((dominantGradient) ? BLEND_DOMINANT : BLEND_NORMAL) : BLEND_NONE; | ||
| } | ||
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| // Pixel Tap Mapping: -|-|-|-|- | ||
| // -|A|B|-|- | ||
| // x|D|E|F|- | ||
| // x|G|H|I|- | ||
| // -|x|x|-|- | ||
| if (!((eq(D,E) && eq(G,H)) || (eq(D,G) && eq(E,H)))) | ||
| { | ||
| float dist_G_E = DistYCbCr(P(-2.,1.) , D) + DistYCbCr(D, B) + DistYCbCr(P(-1.,2.), H) + DistYCbCr(H, F) + (4.0 * DistYCbCr(G, E)); | ||
| float dist_D_H = DistYCbCr(P(-2.,0.) , G) + DistYCbCr(G, P(0.,2.)) + DistYCbCr(A, E) + DistYCbCr(E, I) + (4.0 * DistYCbCr(D, H)); | ||
| bool dominantGradient = (DOMINANT_DIRECTION_THRESHOLD * dist_D_H) < dist_G_E; | ||
| blendResult.w = ((dist_G_E > dist_D_H) && neq(E,D) && neq(E,H)) ? ((dominantGradient) ? BLEND_DOMINANT : BLEND_NORMAL) : BLEND_NONE; | ||
| } | ||
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| // Pixel Tap Mapping: -|-|x|x|- | ||
| // -|A|B|C|x | ||
| // -|D|E|F|x | ||
| // -|-|H|I|- | ||
| // -|-|-|-|- | ||
| if (!((eq(B,C) && eq(E,F)) || (eq(B,E) && eq(C,F)))) | ||
| { | ||
| float dist_E_C = DistYCbCr(D, B) + DistYCbCr(B, P(1,-2)) + DistYCbCr(H, F) + DistYCbCr(F, P(2.,-1.)) + (4.0 * DistYCbCr(E, C)); | ||
| float dist_B_F = DistYCbCr(A, E) + DistYCbCr(E, I) + DistYCbCr(P(0.,-2.), C) + DistYCbCr(C, P(2.,0.)) + (4.0 * DistYCbCr(B, F)); | ||
| bool dominantGradient = (DOMINANT_DIRECTION_THRESHOLD * dist_B_F) < dist_E_C; | ||
| blendResult.y = ((dist_E_C > dist_B_F) && neq(E,B) && neq(E,F)) ? ((dominantGradient) ? BLEND_DOMINANT : BLEND_NORMAL) : BLEND_NONE; | ||
| } | ||
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| // Pixel Tap Mapping: -|x|x|-|- | ||
| // x|A|B|C|- | ||
| // x|D|E|F|- | ||
| // -|G|H|-|- | ||
| // -|-|-|-|- | ||
| if (!((eq(A,B) && eq(D,E)) || (eq(A,D) && eq(B,E)))) | ||
| { | ||
| float dist_D_B = DistYCbCr(P(-2.,0.), A) + DistYCbCr(A, P(0.,-2.)) + DistYCbCr(G, E) + DistYCbCr(E, C) + (4.0 * DistYCbCr(D, B)); | ||
| float dist_A_E = DistYCbCr(P(-2.,-1.), D) + DistYCbCr(D, H) + DistYCbCr(P(-1.,-2.), B) + DistYCbCr(B, F) + (4.0 * DistYCbCr(A, E)); | ||
| bool dominantGradient = (DOMINANT_DIRECTION_THRESHOLD * dist_D_B) < dist_A_E; | ||
| blendResult.x = ((dist_D_B < dist_A_E) && neq(E,D) && neq(E,B)) ? ((dominantGradient) ? BLEND_DOMINANT : BLEND_NORMAL) : BLEND_NONE; | ||
| } | ||
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| FragColor = vec4(blendResult); | ||
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| // Pixel Tap Mapping: -|-|-|-|- | ||
| // -|-|B|C|- | ||
| // -|D|E|F|x | ||
| // -|G|H|I|x | ||
| // -|-|x|x|- | ||
| if (blendResult.z == BLEND_DOMINANT || (blendResult.z == BLEND_NORMAL && | ||
| !((blendResult.y != BLEND_NONE && !IsPixEqual(E, G)) || (blendResult.w != BLEND_NONE && !IsPixEqual(E, C)) || | ||
| (IsPixEqual(G, H) && IsPixEqual(H, I) && IsPixEqual(I, F) && IsPixEqual(F, C) && !IsPixEqual(E, I))))) | ||
| { | ||
| FragColor.z += 4.0; | ||
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| float dist_F_G = DistYCbCr(F, G); | ||
| float dist_H_C = DistYCbCr(H, C); | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_F_G <= dist_H_C) && neq(E,G) && neq(D,G)) | ||
| FragColor.z += 16.0; | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_H_C <= dist_F_G) && neq(E,C) && neq(B,C)) | ||
| FragColor.z += 64.0; | ||
| } | ||
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| // Pixel Tap Mapping: -|-|-|-|- | ||
| // -|A|B|-|- | ||
| // x|D|E|F|- | ||
| // x|G|H|I|- | ||
| // -|x|x|-|- | ||
| if (blendResult.w == BLEND_DOMINANT || (blendResult.w == BLEND_NORMAL && | ||
| !((blendResult.z != BLEND_NONE && !IsPixEqual(E, A)) || (blendResult.x != BLEND_NONE && !IsPixEqual(E, I)) || | ||
| (IsPixEqual(A, D) && IsPixEqual(D, G) && IsPixEqual(G, H) && IsPixEqual(H, I) && !IsPixEqual(E, G))))) | ||
| { | ||
| FragColor.w += 4.0; | ||
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| float dist_H_A = DistYCbCr(H, A); | ||
| float dist_D_I = DistYCbCr(D, I); | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_H_A <= dist_D_I) && neq(E,A) && neq(B,A)) | ||
| FragColor.w += 16.0; | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_D_I <= dist_H_A) && neq(E,I) && neq(F,I)) | ||
| FragColor.w += 64.0; | ||
| } | ||
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| // Pixel Tap Mapping: -|-|x|x|- | ||
| // -|A|B|C|x | ||
| // -|D|E|F|x | ||
| // -|-|H|I|- | ||
| // -|-|-|-|- | ||
| if (blendResult.y == BLEND_DOMINANT || (blendResult.y == BLEND_NORMAL && | ||
| !((blendResult.x != BLEND_NONE && !IsPixEqual(E, I)) || (blendResult.z != BLEND_NONE && !IsPixEqual(E, A)) || | ||
| (IsPixEqual(I, F) && IsPixEqual(F, C) && IsPixEqual(C, B) && IsPixEqual(B, A) && !IsPixEqual(E, C))))) | ||
| { | ||
| FragColor.y += 4.0; | ||
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| float dist_B_I = DistYCbCr(B, I); | ||
| float dist_F_A = DistYCbCr(F, A); | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_B_I <= dist_F_A) && neq(E,I) && neq(H,I)) | ||
| FragColor.y += 16.0; | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_F_A <= dist_B_I) && neq(E,A) && neq(D,A)) | ||
| FragColor.y += 64.0; | ||
| } | ||
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| // Pixel Tap Mapping: -|x|x|-|- | ||
| // x|A|B|C|- | ||
| // x|D|E|F|- | ||
| // -|G|H|-|- | ||
| // -|-|-|-|- | ||
| if (blendResult.x == BLEND_DOMINANT || (blendResult.x == BLEND_NORMAL && | ||
| !((blendResult.w != BLEND_NONE && !IsPixEqual(E, C)) || (blendResult.y != BLEND_NONE && !IsPixEqual(E, G)) || | ||
| (IsPixEqual(C, B) && IsPixEqual(B, A) && IsPixEqual(A, D) && IsPixEqual(D, G) && !IsPixEqual(E, A))))) | ||
| { | ||
| FragColor.x += 4.0; | ||
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| float dist_D_C = DistYCbCr(D, C); | ||
| float dist_B_G = DistYCbCr(B, G); | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_D_C <= dist_B_G) && neq(E,C) && neq(F,C)) | ||
| FragColor.x += 16.0; | ||
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| if ((STEEP_DIRECTION_THRESHOLD * dist_B_G <= dist_D_C) && neq(E,G) && neq(H,G)) | ||
| FragColor.x += 64.0; | ||
| } | ||
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| FragColor /= 255.0; | ||
| } | ||
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| ## ----- TECH --------------------------------------------------------------------- | ||
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| technique Standard | ||
| { | ||
| blendfunc = opaque; | ||
| vs = Shared + Vertex; | ||
| fs = Shared + Fragment; | ||
| vertexattrib[0] = position; | ||
| } |
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