1 files changed, 67 insertions, 0 deletions
diff --git a/thirdparty/amd-fsr2/shaders/ffx_fsr2_rcas.h b/thirdparty/amd-fsr2/shaders/ffx_fsr2_rcas.h
new file mode 100644
index 0000000000..d9006cd8ee
--- /dev/null
+++ b/thirdparty/amd-fsr2/shaders/ffx_fsr2_rcas.h
@@ -0,0 +1,67 @@
+// This file is part of the FidelityFX SDK.
+//
+// Copyright (c) 2022-2023 Advanced Micro Devices, Inc. All rights reserved.
+//
+// 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.
+
+#define GROUP_SIZE  8
+
+#define FSR_RCAS_DENOISE 1
+
+void WriteUpscaledOutput(FFX_MIN16_U2 iPxHrPos, FfxFloat32x3 fUpscaledColor)
+{
+    StoreUpscaledOutput(FFX_MIN16_I2(iPxHrPos), fUpscaledColor);
+}
+
+#define FSR_RCAS_F
+FfxFloat32x4 FsrRcasLoadF(FfxInt32x2 p)
+{
+    FfxFloat32x4 fColor = LoadRCAS_Input(p);
+
+    fColor.rgb = PrepareRgb(fColor.rgb, Exposure(), PreExposure());
+
+    return fColor;
+}
+
+void FsrRcasInputF(inout FfxFloat32 r, inout FfxFloat32 g, inout FfxFloat32 b) {}
+
+#include "ffx_fsr1.h"
+
+
+void CurrFilter(FFX_MIN16_U2 pos)
+{
+    FfxFloat32x3 c;
+    FsrRcasF(c.r, c.g, c.b, pos, RCASConfig());
+
+    c = UnprepareRgb(c, Exposure());
+
+    WriteUpscaledOutput(pos, c);
+}
+
+void RCAS(FfxUInt32x3 LocalThreadId, FfxUInt32x3 WorkGroupId, FfxUInt32x3 Dtid)
+{
+    // Do remapping of local xy in workgroup for a more PS-like swizzle pattern.
+    FfxUInt32x2 gxy = ffxRemapForQuad(LocalThreadId.x) + FfxUInt32x2(WorkGroupId.x << 4u, WorkGroupId.y << 4u);
+    CurrFilter(FFX_MIN16_U2(gxy));
+    gxy.x += 8u;
+    CurrFilter(FFX_MIN16_U2(gxy));
+    gxy.y += 8u;
+    CurrFilter(FFX_MIN16_U2(gxy));
+    gxy.x -= 8u;
+    CurrFilter(FFX_MIN16_U2(gxy));
+}