mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-25 23:25:41 +00:00
7cf7a0a11f
This is a first pack of shaders ported to dolphinfx specs. It includes: crt-hyllian, crt-easymode, zfast-crt, ddt, xbr, jinc2 and pixellate.
111 lines
2.9 KiB
GLSL
111 lines
2.9 KiB
GLSL
// Hyllian's DDT Shader
|
|
|
|
// Copyright (C) 2011-2024 Hyllian - sergiogdb@gmail.com
|
|
|
|
// 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.
|
|
|
|
|
|
/*
|
|
[configuration]
|
|
|
|
[OptionRangeFloat]
|
|
GUIName = Bilinear Fallback Threshold
|
|
OptionName = BIL_FALLBACK
|
|
MinValue = 0.0
|
|
MaxValue = 1.0
|
|
StepAmount = 0.05
|
|
DefaultValue = 0.6
|
|
|
|
[/configuration]
|
|
*/
|
|
|
|
const vec3 Y = vec3(0.2126729, 0.7151522, 0.0721750);
|
|
|
|
float luma(vec3 color)
|
|
{
|
|
return dot(color, Y);
|
|
}
|
|
|
|
vec3 bilinear(float p, float q, vec3 A, vec3 B, vec3 C, vec3 D)
|
|
{
|
|
return ((1-p)*(1-q)*A + p*(1-q)*B + (1-p)*q*C + p*q*D);
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec2 texCoord = GetCoordinates();
|
|
vec2 nativeSize = 1.0 / GetInvNativePixelSize();
|
|
|
|
vec2 loc = texCoord*nativeSize;
|
|
vec2 pos = fract(loc) - vec2(0.5, 0.5); // pos = pixel position
|
|
vec2 dir = sign(pos); // dir = pixel direction
|
|
|
|
vec2 dx = vec2(1.0/nativeSize.x, 0.0);
|
|
vec2 dy = vec2(0.0, 1.0/nativeSize.y);
|
|
|
|
vec2 g1 = dir*dx;
|
|
vec2 g2 = dir*dy;
|
|
|
|
vec2 tc = (floor(loc)+vec2(0.5,0.5))/nativeSize;
|
|
|
|
vec3 A = SampleLocation(tc ).rgb;
|
|
vec3 B = SampleLocation(tc +g1 ).rgb;
|
|
vec3 C = SampleLocation(tc +g2).rgb;
|
|
vec3 D = SampleLocation(tc +g1+g2).rgb;
|
|
|
|
float a = luma(A);
|
|
float b = luma(B);
|
|
float c = luma(C);
|
|
float d = luma(D);
|
|
|
|
float p = abs(pos.x);
|
|
float q = abs(pos.y);
|
|
|
|
float k = distance(pos,g1);
|
|
float l = distance(pos,g2);
|
|
|
|
float wd1 = abs(a-d);
|
|
float wd2 = abs(b-c);
|
|
|
|
vec3 color = bilinear(p, q, A, B, C, D);
|
|
|
|
if ( wd1 < wd2 )
|
|
{
|
|
if (k < l)
|
|
{
|
|
C = A + D - B;
|
|
}
|
|
else
|
|
{
|
|
B = A + D - C;
|
|
}
|
|
}
|
|
else if (wd1 > wd2)
|
|
{
|
|
D = B + C - A;
|
|
}
|
|
|
|
|
|
vec3 ddt = bilinear(p, q, A, B, C, D);
|
|
|
|
color = mix(color, ddt, smoothstep(0.0, BIL_FALLBACK, abs(wd2-wd1)));
|
|
|
|
SetOutput(vec4(color, 1.0));
|
|
}
|