Reduced number of SPD mip levels used by luma pyramid and shading change pyramid passes by one for OpenGL Core, to ensure they stay within the limit of 8 UAV bindings.

Shaders/shaders/ffx_fsr3upscaler_luma_pyramid_pass.hlsl

@@ -30,8 +30,12 @@
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_2                4
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_3                5
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_4                6
+#ifdef SHADER_API_GLCORE
+#define FSR3UPSCALER_BIND_UAV_FARTHEST_DEPTH_MIP1             7
+#else
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_5                7
 #define FSR3UPSCALER_BIND_UAV_FARTHEST_DEPTH_MIP1             8
+#endif
 
 
 #define FSR3UPSCALER_BIND_CB_FSR3UPSCALER                     0

Shaders/shaders/ffx_fsr3upscaler_shading_change_pyramid_pass.hlsl

@@ -32,7 +32,9 @@
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_2                      3
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_3                      4
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_4                      5
+#ifndef SHADER_API_GLCORE
 #define FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_5                      6
+#endif
 
 
 #define FSR3UPSCALER_BIND_CB_FSR3UPSCALER                           0

Shaders/shaders/fsr3upscaler/ffx_fsr3upscaler_callbacks_hlsl.h

@@ -929,14 +929,18 @@ FfxFloat32x4 FrameInfo()
     defined(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_2)    && \
     defined(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_3)    && \
     defined(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_4)    && \
-    defined(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_5)
+    (defined(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_5) || defined(SHADER_API_GLCORE))
 
 RWTexture2D<FfxFloat32x2>                   rw_spd_mip0   : FFX_DECLARE_UAV(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_0);
 RWTexture2D<FfxFloat32x2>                   rw_spd_mip1   : FFX_DECLARE_UAV(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_1);
 RWTexture2D<FfxFloat32x2>                   rw_spd_mip2   : FFX_DECLARE_UAV(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_2);
 RWTexture2D<FfxFloat32x2>                   rw_spd_mip3   : FFX_DECLARE_UAV(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_3);
+#ifdef SHADER_API_GLCORE
+globallycoherent RWTexture2D<FfxFloat32x2>  rw_spd_mip4   : FFX_DECLARE_UAV(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_4);
+#else
 RWTexture2D<FfxFloat32x2>                   rw_spd_mip4   : FFX_DECLARE_UAV(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_4);
 globallycoherent RWTexture2D<FfxFloat32x2>  rw_spd_mip5   : FFX_DECLARE_UAV(FSR3UPSCALER_BIND_UAV_SPD_MIPS_LEVEL_5);
+#endif
 
 FfxFloat32x2 RWLoadPyramid(FFX_PARAMETER_IN FfxInt32x2 iPxPos, FFX_PARAMETER_IN FfxUInt32 index)
 {
@@ -950,7 +954,9 @@ FfxFloat32x2 RWLoadPyramid(FFX_PARAMETER_IN FfxInt32x2 iPxPos, FFX_PARAMETER_IN
     LOAD(2);
     LOAD(3);
     LOAD(4);
+#ifndef SHADER_API_GLCORE
     LOAD(5);
+#endif
 
     return 0;
 
@@ -970,7 +976,9 @@ void StorePyramid(FFX_PARAMETER_IN FfxInt32x2 iPxPos, FFX_PARAMETER_IN FfxFloat3
     STORE(2);
     STORE(3);
     STORE(4);
+#ifndef SHADER_API_GLCORE
     STORE(5);
+#endif
 
 #undef STORE
 }

Shaders/shaders/fsr3upscaler/ffx_fsr3upscaler_shading_change_pyramid.h

@@ -200,7 +200,11 @@ FfxFloat32x4 SpdLoadSourceImage(FfxFloat32x2 iPxPos, FfxUInt32 slice)
 
 FfxFloat32x4 SpdLoad(FfxInt32x2 tex, FfxUInt32 slice)
 {
+#ifdef SHADER_API_GLCORE
+    return FfxFloat32x4(RWLoadPyramid(tex, 4), 0, 0);
+#else
     return FfxFloat32x4(RWLoadPyramid(tex, 5), 0, 0);
+#endif
 }
 
 FfxFloat32x4 SpdReduce4(FfxFloat32x4 v0, FfxFloat32x4 v1, FfxFloat32x4 v2, FfxFloat32x4 v3)