Bundle extra shaders ported from PPSSPP

2026-09-05 12:00:05 +00:00 · 2026-09-04 22:45:02 -04:00
parent 898da17e30
commit 81734e85b9
13 changed files with 594 additions and 59 deletions
@@ -0,0 +1,79 @@
+// 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 crt.fsh in PPSSPP, by KillaMaaki.
+
+
+texture BackBufferTex : COLOR;
+sampler BackBuffer { Texture = BackBufferTex; };
+
+uniform float Timer < source = "timer"; > = 0.0;
+
+uniform float Density <
+    ui_type = "slider";
+    ui_label = "Line Density";
+    ui_min = 60.0; ui_max = 720.0; ui_step = 10.0;
+> = 272.0;
+
+uniform float RollSpeed <
+    ui_type = "slider";
+    ui_label = "Roll Speed";
+    ui_tooltip = "Speed of the rolling bar. Zero disables it.";
+    ui_min = 0.0; ui_max = 2.0; ui_step = 0.05;
+> = 1.0;
+
+uniform float Bleed <
+    ui_type = "slider";
+    ui_label = "Colour Bleed";
+    ui_tooltip = "Horizontal separation of the red and green channels.";
+    ui_min = 0.0; ui_max = 4.0; ui_step = 0.1;
+> = 1.0;
+
+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_CRT(float4 pos : SV_Position, float2 uv : TEXCOORD) : SV_Target
+{
+    float seconds = Timer * 0.001;
+    float scan = floor((uv.y + seconds * RollSpeed * 0.5) * Density);
+    float line_intensity = frac(scan * 0.5) * 2.0;
+
+    float2 shift = float2(line_intensity * 0.0005, 0.0);
+    float2 bleed = float2(BUFFER_RCP_WIDTH * Bleed, 0.0);
+
+    float r = tex2D(BackBuffer, uv + bleed + shift).r;
+    float g = tex2D(BackBuffer, uv - bleed + shift).g;
+    float b = tex2D(BackBuffer, uv).b;
+
+    float3 color = float3(r, g * 0.99, b) * clamp(line_intensity, 0.85, 1.0);
+
+    if (RollSpeed > 0.0)
+    {
+        float rollbar = sin((uv.y + seconds * RollSpeed) * 4.0);
+        color += rollbar * 0.02;
+    }
+
+    return float4(saturate(color), 1.0);
+}
+
+technique CRT
+{
+    pass
+    {
+        VertexShader = VS_PostProcess;
+        PixelShader = PS_CRT;
+    }
+}