1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2012 PPSSPP Project
// SPDX-License-Identifier: GPL-2.0-or-later
// Ported from vignette.fsh in PPSSPP, by Henrik Rydgard.
texture BackBufferTex : COLOR;
sampler BackBuffer { Texture = BackBufferTex; };
uniform float Strength <
ui_type = "slider";
ui_label = "Strength";
ui_tooltip = "How dark the corners become.";
ui_min = 0.0; ui_max = 2.0; ui_step = 0.01;
> = 0.6;
uniform float Aspect <
ui_type = "slider";
ui_label = "Aspect";
ui_min = 0.5; ui_max = 2.0; ui_step = 0.01;
> = 1.0;
void VS_PostProcess(in uint id : SV_VertexID, out float4 pos : SV_Position, out float2 uv : TEXCOORD)
{
uv = float2(float(id & 2), float((id & 1) << 1));
pos = float4(uv * float2(2.0, -2.0) + float2(-1.0, 1.0), 0.0, 1.0);
}
float4 PS_Vignette(float4 pos : SV_Position, float2 uv : TEXCOORD) : SV_Target
{
float2 diff = uv - 0.5;
diff.x *= Aspect;
diff.y /= max(Aspect, 0.0001);
float falloff = 1.0 - min(1.0, Strength * dot(diff, diff) * 2.0);
float3 rgb = tex2D(BackBuffer, uv).rgb;
return float4(rgb * falloff, 1.0);
}
technique Vignette <
ui_label = "Vignette";
ui_tooltip = "Darkens the corners of the screen to pull the eye towards the middle, the way a camera lens falls off at its edges.";
>
{
pass
{
VertexShader = VS_PostProcess;
PixelShader = PS_Vignette;
}
}
|
