mirror of
https://git.eden-emu.dev/eden-emu/eden.git
synced 2026-09-08 13:11:02 +00:00
CamilleLaVey
110 lines
3.5 KiB
HLSL
110 lines
3.5 KiB
HLSL
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
|
|
// SPDX-License-Identifier: GPL-3.0-or-later
|
|
|
|
texture BackBufferTex : COLOR;
|
|
sampler BackBuffer { Texture = BackBufferTex; };
|
|
|
|
uniform float Radius <
|
|
ui_type = "slider";
|
|
ui_label = "Radius";
|
|
ui_tooltip = "How far the blur reaches, in pixels.";
|
|
ui_min = 1.0; ui_max = 12.0; ui_step = 0.5;
|
|
> = 4.0;
|
|
|
|
uniform float Strength <
|
|
ui_type = "slider";
|
|
ui_label = "Strength";
|
|
ui_tooltip = "Blend between the original image and the blurred one.";
|
|
ui_min = 0.0; ui_max = 1.0; ui_step = 0.05;
|
|
> = 1.0;
|
|
|
|
uniform float FocusSize <
|
|
ui_type = "slider";
|
|
ui_label = "Sharp Centre";
|
|
ui_tooltip = "Size of the region left in focus at the centre of the screen. At zero the whole image is blurred evenly.";
|
|
ui_min = 0.0; ui_max = 1.0; ui_step = 0.05;
|
|
> = 0.0;
|
|
|
|
uniform float FocusSoftness <
|
|
ui_type = "slider";
|
|
ui_label = "Focus Falloff";
|
|
ui_tooltip = "How gradually the sharp centre gives way to the blur.";
|
|
ui_min = 0.05; ui_max = 1.0; ui_step = 0.05;
|
|
> = 0.4;
|
|
|
|
static const int TAPS = 17;
|
|
static const float3 KERNEL[17] = {
|
|
float3( 0.171499, 0.000000, 0.942873),
|
|
float3(-0.219031, 0.200651, 0.838223),
|
|
float3( 0.033526, -0.382014, 0.745189),
|
|
float3( 0.276075, 0.360090, 0.662480),
|
|
float3(-0.506631, -0.089616, 0.588951),
|
|
float3( 0.479925, -0.305289, 0.523583),
|
|
float3(-0.160526, 0.597147, 0.465471),
|
|
float3(-0.306140, -0.589453, 0.413808),
|
|
float3( 0.664200, 0.242565, 0.367879),
|
|
float3(-0.690990, 0.285231, 0.327048),
|
|
float3( 0.333103, -0.711821, 0.290749),
|
|
float3( 0.246154, 0.784779, 0.258479),
|
|
float3(-0.741912, -0.429953, 0.229790),
|
|
float3( 0.870348, -0.191344, 0.204286),
|
|
float3(-0.531160, 0.755520, 0.181612),
|
|
float3(-0.122710, -0.946946, 0.161455),
|
|
float3( 0.753320, 0.634899, 0.143535)
|
|
};
|
|
|
|
void VS_PostProcess(in uint id : SV_VertexID, out float4 pos : SV_Position, out float2 uv : TEXCOORD)
|
|
{
|
|
uv = float2(0.0, 0.0);
|
|
if (id == 2)
|
|
{
|
|
uv.x = 2.0;
|
|
}
|
|
if (id == 1)
|
|
{
|
|
uv.y = 2.0;
|
|
}
|
|
pos = float4(uv * float2(2.0, -2.0) + float2(-1.0, 1.0), 0.0, 1.0);
|
|
}
|
|
|
|
float4 PS_Blur(float4 pos : SV_Position, float2 uv : TEXCOORD) : SV_Target
|
|
{
|
|
float2 texel = float2(BUFFER_RCP_WIDTH, BUFFER_RCP_HEIGHT);
|
|
float3 original = tex2D(BackBuffer, uv).rgb;
|
|
|
|
float2 centred = (uv - 0.5) * float2(BUFFER_WIDTH * BUFFER_RCP_HEIGHT, 1.0) * 2.0;
|
|
float distance_from_centre = length(centred);
|
|
float no_focus = 1.0 - step(0.001, FocusSize);
|
|
float focus = max(smoothstep(FocusSize, FocusSize + FocusSoftness, distance_from_centre), no_focus);
|
|
float amount = Strength * focus;
|
|
|
|
float angle = frac(sin(dot(pos.xy, float2(12.9898, 78.233))) * 43758.5453) * 6.2831853;
|
|
float2 rotation = float2(cos(angle), sin(angle));
|
|
|
|
float3 sum = float3(0.0, 0.0, 0.0);
|
|
float total = 0.0;
|
|
for (int i = 0; i < TAPS; ++i)
|
|
{
|
|
float3 tap = KERNEL[i];
|
|
float2 spun = float2(tap.x * rotation.x - tap.y * rotation.y,
|
|
tap.x * rotation.y + tap.y * rotation.x);
|
|
sum += tex2D(BackBuffer, uv + spun * texel * Radius).rgb * tap.z;
|
|
total += tap.z;
|
|
}
|
|
|
|
float3 blurred = sum / total;
|
|
return float4(lerp(original, blurred, amount), 1.0);
|
|
}
|
|
|
|
technique Blur <
|
|
ui_label = "Blur";
|
|
ui_tooltip = "Gaussian blur with an optional sharp centre, for softening the picture or faking depth of field.";
|
|
>
|
|
{
|
|
pass
|
|
{
|
|
VertexShader = VS_PostProcess;
|
|
PixelShader = PS_Blur;
|
|
}
|
|
}
|