mirror of
https://github.com/libretro/slang-shaders.git
synced 2024-06-02 11:28:21 -04:00
256 lines
9.6 KiB
Plaintext
256 lines
9.6 KiB
Plaintext
#version 450
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/*
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SABR v3.0 Shader
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Joshua Street
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Portions of this algorithm were taken from Hyllian's 5xBR v3.7c
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shader.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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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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} 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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#define saturate(c) clamp(c, 0.0, 1.0)
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#define lerp(a,b,c) mix(a,b,c)
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#define mul(a,b) (b*a)
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#define fmod(a,b) mod(a,b)
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#define frac(c) fract(c)
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#define tex2D(c,d) texture(c,d)
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#define float2 vec2
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#define float3 vec3
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#define float4 vec4
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#define int2 ivec2
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#define int3 ivec3
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#define int4 ivec4
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#define bool2 bvec2
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#define bool3 bvec3
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#define bool4 bvec4
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#define float2x2 mat2x2
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#define float3x3 mat3x3
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#define float4x4 mat4x4
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#define decal Source
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const float4 Ai = float4( 1.0, -1.0, -1.0, 1.0);
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const float4 B45 = float4( 1.0, 1.0, -1.0, -1.0);
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const float4 C45 = float4( 1.5, 0.5, -0.5, 0.5);
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const float4 B30 = float4( 0.5, 2.0, -0.5, -2.0);
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const float4 C30 = float4( 1.0, 1.0, -0.5, 0.0);
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const float4 B60 = float4( 2.0, 0.5, -2.0, -0.5);
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const float4 C60 = float4( 2.0, 0.0, -1.0, 0.5);
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const float4 M45 = float4(0.4, 0.4, 0.4, 0.4);
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const float4 M30 = float4(0.2, 0.4, 0.2, 0.4);
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const float4 M60 = M30.yxwz;
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const float4 Mshift = float4(0.2, 0.2, 0.2, 0.2);
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const float coef = 2.0;
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const float4 threshold = float4(0.32, 0.32, 0.32, 0.32);
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const float3 lum = float3(0.21, 0.72, 0.07);
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float4 lum_to(float3 v0, float3 v1, float3 v2, float3 v3) {
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return float4(dot(lum, v0), dot(lum, v1), dot(lum, v2), dot(lum, v3));
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}
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float4 lum_df(float4 A, float4 B) {
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return abs(A - B);
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}
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bool4 lum_eq(float4 A, float4 B) {
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return lessThan(lum_df(A, B) , float4(threshold));
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}
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float4 lum_wd(float4 a, float4 b, float4 c, float4 d, float4 e, float4 f, float4 g, float4 h) {
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return lum_df(a, b) + lum_df(a, c) + lum_df(d, e) + lum_df(d, f) + 4.0 * lum_df(g, h);
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}
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float c_df(float3 c1, float3 c2) {
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float3 df = abs(c1 - c2);
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return df.r + df.g + df.b;
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}
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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 tc;
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layout(location = 1) out vec4 xyp_1_2_3;
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layout(location = 2) out vec4 xyp_5_10_15;
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layout(location = 3) out vec4 xyp_6_7_8;
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layout(location = 4) out vec4 xyp_9_14_9;
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layout(location = 5) out vec4 xyp_11_12_13;
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layout(location = 6) out vec4 xyp_16_17_18;
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layout(location = 7) out vec4 xyp_21_22_23;
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void main()
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{
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gl_Position = global.MVP * Position;
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float x = params.SourceSize.z;//1.0 / IN.texture_size.x;
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float y = params.SourceSize.w;//1.0 / IN.texture_size.y;
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tc = TexCoord * 1.00001;
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xyp_1_2_3 = tc.xxxy + float4( -x, 0.0, x, -2.0 * y);
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xyp_6_7_8 = tc.xxxy + float4( -x, 0.0, x, -y);
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xyp_11_12_13 = tc.xxxy + float4( -x, 0.0, x, 0.0);
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xyp_16_17_18 = tc.xxxy + float4( -x, 0.0, x, y);
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xyp_21_22_23 = tc.xxxy + float4( -x, 0.0, x, 2.0 * y);
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xyp_5_10_15 = tc.xyyy + float4(-2.0 * x, -y, 0.0, y);
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xyp_9_14_9 = tc.xyyy + float4( 2.0 * x, -y, 0.0, y);
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}
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#pragma stage fragment
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layout(location = 0) in vec2 tc;
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layout(location = 1) in vec4 xyp_1_2_3;
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layout(location = 2) in vec4 xyp_5_10_15;
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layout(location = 3) in vec4 xyp_6_7_8;
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layout(location = 4) in vec4 xyp_9_14_9;
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layout(location = 5) in vec4 xyp_11_12_13;
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layout(location = 6) in vec4 xyp_16_17_18;
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layout(location = 7) in vec4 xyp_21_22_23;
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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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/*
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Mask for algorithm
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+-----+-----+-----+-----+-----+
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| | 1 | 2 | 3 | |
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+-----+-----+-----+-----+-----+
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| 5 | 6 | 7 | 8 | 9 |
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+-----+-----+-----+-----+-----+
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| 10 | 11 | 12 | 13 | 14 |
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+-----+-----+-----+-----+-----+
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| 15 | 16 | 17 | 18 | 19 |
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+-----+-----+-----+-----+-----+
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| | 21 | 22 | 23 | |
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+-----+-----+-----+-----+-----+
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*/
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// Store mask values
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float3 P1 = tex2D(decal, xyp_1_2_3.xw ).rgb;
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float3 P2 = tex2D(decal, xyp_1_2_3.yw ).rgb;
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float3 P3 = tex2D(decal, xyp_1_2_3.zw ).rgb;
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float3 P6 = tex2D(decal, xyp_6_7_8.xw ).rgb;
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float3 P7 = tex2D(decal, xyp_6_7_8.yw ).rgb;
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float3 P8 = tex2D(decal, xyp_6_7_8.zw ).rgb;
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float3 P11 = tex2D(decal, xyp_11_12_13.xw).rgb;
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float3 P12 = tex2D(decal, xyp_11_12_13.yw).rgb;
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float3 P13 = tex2D(decal, xyp_11_12_13.zw).rgb;
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float3 P16 = tex2D(decal, xyp_16_17_18.xw).rgb;
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float3 P17 = tex2D(decal, xyp_16_17_18.yw).rgb;
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float3 P18 = tex2D(decal, xyp_16_17_18.zw).rgb;
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float3 P21 = tex2D(decal, xyp_21_22_23.xw).rgb;
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float3 P22 = tex2D(decal, xyp_21_22_23.yw).rgb;
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float3 P23 = tex2D(decal, xyp_21_22_23.zw).rgb;
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float3 P5 = tex2D(decal, xyp_5_10_15.xy ).rgb;
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float3 P10 = tex2D(decal, xyp_5_10_15.xz ).rgb;
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float3 P15 = tex2D(decal, xyp_5_10_15.xw ).rgb;
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float3 P9 = tex2D(decal, xyp_9_14_9.xy ).rgb;
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float3 P14 = tex2D(decal, xyp_9_14_9.xz ).rgb;
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float3 P19 = tex2D(decal, xyp_9_14_9.xw ).rgb;
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// Store luminance values of each point
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float4 p7 = lum_to(P7, P11, P17, P13);
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float4 p8 = lum_to(P8, P6, P16, P18);
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float4 p11 = p7.yzwx; // P11, P17, P13, P7
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float4 p12 = lum_to(P12, P12, P12, P12);
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float4 p13 = p7.wxyz; // P13, P7, P11, P17
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float4 p14 = lum_to(P14, P2, P10, P22);
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float4 p16 = p8.zwxy; // P16, P18, P8, P6
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float4 p17 = p7.zwxy; // P11, P17, P13, P7
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float4 p18 = p8.wxyz; // P18, P8, P6, P16
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float4 p19 = lum_to(P19, P3, P5, P21);
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float4 p22 = p14.wxyz; // P22, P14, P2, P10
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float4 p23 = lum_to(P23, P9, P1, P15);
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float2 fp = frac(tc * params.SourceSize.xy);
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float4 ma45 = smoothstep(C45 - M45, C45 + M45, Ai * fp.y + B45 * fp.x);
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float4 ma30 = smoothstep(C30 - M30, C30 + M30, Ai * fp.y + B30 * fp.x);
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float4 ma60 = smoothstep(C60 - M60, C60 + M60, Ai * fp.y + B60 * fp.x);
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float4 marn = smoothstep(C45 - M45 + Mshift, C45 + M45 + Mshift, Ai * fp.y + B45 * fp.x);
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float4 e45 = lum_wd(p12, p8, p16, p18, p22, p14, p17, p13);
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float4 econt = lum_wd(p17, p11, p23, p13, p7, p19, p12, p18);
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float4 e30 = lum_df(p13, p16);
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float4 e60 = lum_df(p8, p17);
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/* The whole edge detection thing seems broken here, so may as well comment it out to save cycles
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bool4 r45 = (notEqual(p12 , p13) == bool4(true) && notEqual(p12 , p17) == bool4(true) && (
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lum_eq(p13, p7) == bool4(false) && lum_eq(p13, p8) == bool4(false) ||
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lum_eq(p17, p11) == bool4(false) && lum_eq(p17, p16) == bool4(false) ||
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lum_eq(p12, p18) == bool4(true) && (
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lum_eq(p13, p14) == bool4(false) && lum_eq(p13, p19) == bool4(false) ||
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lum_eq(p17, p22) == bool4(false) && lum_eq(p17, p23) == bool4(false)) ||
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lum_eq(p12, p16) == bool4(true) ||
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lum_eq(p12, p8) == bool4(true))) ? bool4(true) : bool4(false);
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bool4 r30 = (notEqual(p12 , p16) == bool4(true) && notEqual(p11 , p16) == bool4(true)) ? bool4(true) : bool4(false);
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bool4 r60 = (notEqual(p12 , p8) == bool4(true) && notEqual(p7 , p8) == bool4(true)) ? bool4(true) : bool4(false);
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bool4 edr45 = (lessThan(e45 , econt) == bool4(true) && r45 == bool4(true)) ? bool4(true) : bool4(false);
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bool4 edrrn = (lessThanEqual(e45 , econt) == bool4(true)) ? bool4(true) : bool4(false);
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bool4 edr30 = (lessThanEqual(e30 * coef , e60) == bool4(true) && (r30 == bool4(true))) ? bool4(true) : bool4(false);
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bool4 edr60 = (lessThanEqual(e60 * coef , e30) == bool4(true) && (r60 == bool4(true))) ? bool4(true) : bool4(false);
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*/
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//FIXME: dunno what's up here. final45 is the only one that seems to matter and it's either all on or all off
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// again, may as well comment it out to save cycles :/
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float4 final45 = float4(1.0);//(edr30 == bool4(false) && edr60 == bool4(false) && edr45 == bool4(true)) ? float4(1.0) : float4(1.0);
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float4 final30 = float4(0.0);//(edr45 == bool4(true) && edr30 == bool4(true) && edr60 == bool4(false)) ? float4(1.0) : float4(0.0);
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float4 final60 = float4(0.0);//(edr45 == bool4(true) && edr60 == bool4(true) && edr30 == bool4(false)) ? float4(1.0) : float4(0.0);
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float4 final36 = float4(0.0);//(edr45 == bool4(true) && edr30 == bool4(true) && edr60 == bool4(true)) ? float4(1.0) : float4(0.0);
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float4 finalrn = float4(0.0);//(edr45 == bool4(false) && edrrn == bool4(true)) ? float4(1.0) : float4(0.0);
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float4 px = step(lum_df(p12, p17), lum_df(p12, p13));
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float4 mac = final36 * max(ma30, ma60) + final30 * ma30 + final60 * ma60 + final45 * ma45 + finalrn * marn;
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float3 res1 = P12;
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res1 = lerp(res1, lerp(P13, P17, px.x), mac.x);
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res1 = lerp(res1, lerp(P7 , P13, px.y), mac.y);
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res1 = lerp(res1, lerp(P11, P7 , px.z), mac.z);
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res1 = lerp(res1, lerp(P17, P11, px.w), mac.w);
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float3 res2 = P12;
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res2 = lerp(res2, lerp(P17, P11, px.w), mac.w);
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res2 = lerp(res2, lerp(P11, P7 , px.z), mac.z);
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res2 = lerp(res2, lerp(P7 , P13, px.y), mac.y);
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res2 = lerp(res2, lerp(P13, P17, px.x), mac.x);
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FragColor = float4(lerp(res1, res2, step(c_df(P12, res1), c_df(P12, res2))), 1.0);
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} |