[gfx] metal backend skeleton (#4223)

* add metal-cpp submodule

* add metal-cpp cmake target

* gfx metal backend skeleton

* add premake support

* add foundation framework

* add metal-cpp include to premake

* update vs project file

---------

Co-authored-by: Simon Kallweit <skallweit@nvidia.com>
Co-authored-by: Jay Kwak <82421531+jkwak-work@users.noreply.github.com>

1 files changed, 181 insertions, 0 deletions

diff --git a/tools/gfx/metal/metal-util.cpp b/tools/gfx/metal/metal-util.cpp
new file mode 100644
index 000000000..a8c8da6b6
--- /dev/null
+++ b/tools/gfx/metal/metal-util.cpp
@@ -0,0 +1,181 @@
+// metal-util.cpp
+#include "metal-util.h"
+#include "core/slang-math.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+namespace gfx {
+
+using namespace MTL;
+
+MTL::VertexFormat MetalUtil::getMetalVertexFormat(Format format)
+{
+    switch (format)
+    {
+    case Format::R8G8_UINT:                 return VertexFormatUChar2;
+    // VertexFormatUChar3
+    case Format::R8G8B8A8_UINT:             return VertexFormatUChar4;
+    case Format::R8G8_SINT:                 return VertexFormatChar2;
+    // return VertexFormatChar3
+    case Format::R8G8B8A8_SINT:             return VertexFormatChar4;
+    case Format::R8G8_UNORM:                return VertexFormatUChar2Normalized;
+    // return VertexFormatUChar3Normalized;
+    case Format::R8G8B8A8_UNORM:            return VertexFormatUChar4Normalized;
+    case Format::R8G8_SNORM:                return VertexFormatChar2Normalized;
+    // return VertexFormatChar3Normalized
+    case Format::R8G8B8A8_SNORM:            return VertexFormatChar4Normalized;
+    case Format::R16G16_UINT:               return VertexFormatUShort2;
+    // return VertexFormatUShort3;
+    case Format::R16G16B16A16_UINT:         return VertexFormatUShort4;
+    case Format::R16G16_SINT:               return VertexFormatShort2;
+    // return VertexFormatShort3;
+    case Format::R16G16B16A16_SINT:         return VertexFormatShort4;
+    case Format::R16G16_UNORM:              return VertexFormatUShort2Normalized;
+    // return VertexFormatUShort3Normalized;
+    case Format::R16G16B16A16_UNORM:        return VertexFormatUShort4Normalized;
+    case Format::R16G16_SNORM:              return VertexFormatShort2Normalized;
+    // return VertexFormatShort3Normalized;
+    case Format::R16G16B16A16_SNORM:        return VertexFormatShort4Normalized;
+    case Format::R16G16_FLOAT:              return VertexFormatHalf2;
+    // return VertexFormatHalf3;
+    case Format::R16G16B16A16_FLOAT:        return VertexFormatHalf4;
+    case Format::R32_FLOAT:                 return VertexFormatFloat;
+    case Format::R32G32_FLOAT:              return VertexFormatFloat2;
+    case Format::R32G32B32_FLOAT:           return VertexFormatFloat3;
+    case Format::R32G32B32A32_FLOAT:        return VertexFormatFloat4;
+    case Format::R32_SINT:                  return VertexFormatInt;
+    case Format::R32G32_SINT:               return VertexFormatInt2;
+    case Format::R32G32B32_SINT:            return VertexFormatInt3;
+    case Format::R32G32B32A32_SINT:         return VertexFormatInt4;
+    case Format::R32_UINT:                  return VertexFormatUInt;
+    case Format::R32G32_UINT:               return VertexFormatUInt2;
+    case Format::R32G32B32_UINT:            return VertexFormatUInt3;
+    case Format::R32G32B32A32_UINT:         return VertexFormatUInt4;
+    // return VertexFormatInt1010102Normalized;
+    case Format::R10G10B10A2_UNORM:         return VertexFormatUInt1010102Normalized;
+    case Format::B4G4R4A4_UNORM:            return VertexFormatUChar4Normalized_BGRA;
+    case Format::R8_UINT:                   return VertexFormatUChar;
+    case Format::R8_SINT:                   return VertexFormatChar;
+    case Format::R8_UNORM:                  return VertexFormatUCharNormalized;
+    case Format::R8_SNORM:                  return VertexFormatCharNormalized;
+    case Format::R16_UINT:                  return VertexFormatUShort;
+    case Format::R16_SINT:                  return VertexFormatShort;
+    case Format::R16_UNORM:                 return VertexFormatUShortNormalized;
+    case Format::R16_SNORM:                 return VertexFormatShortNormalized;
+    case Format::R16_FLOAT:                 return VertexFormatHalf;
+    case Format::R11G11B10_FLOAT:           return VertexFormatFloatRG11B10;
+    case Format::R9G9B9E5_SHAREDEXP:        return VertexFormatFloatRGB9E5;
+    default:                                return VertexFormatInvalid;
+    }
+}
+
+/* static */MTL::PixelFormat MetalUtil::getMetalPixelFormat(Format format)
+{
+    switch (format)
+    {
+    case Format::R32G32B32A32_TYPELESS:     return PixelFormatRGBA32Float;
+    case Format::R32G32B32_TYPELESS:        return PixelFormatInvalid;
+    case Format::R32G32_TYPELESS:           return PixelFormatRG32Float;
+    case Format::R32_TYPELESS:              return PixelFormatR32Float;
+
+    case Format::R16G16B16A16_TYPELESS:     return PixelFormatRGBA16Float;
+    case Format::R16G16_TYPELESS:           return PixelFormatRG16Float;
+    case Format::R16_TYPELESS:              return PixelFormatR16Float;
+
+    case Format::R8G8B8A8_TYPELESS:         return PixelFormatRGBA8Unorm;
+    case Format::R8G8_TYPELESS:             return PixelFormatRG8Unorm;
+    case Format::R8_TYPELESS:               return PixelFormatR8Unorm;
+    case Format::B8G8R8A8_TYPELESS:         return PixelFormatBGRA8Unorm;
+
+    case Format::R32G32B32A32_FLOAT:        return PixelFormatRGBA32Float;
+    case Format::R32G32B32_FLOAT:           return PixelFormatInvalid;
+    case Format::R32G32_FLOAT:              return PixelFormatRG32Float;
+    case Format::R32_FLOAT:                 return PixelFormatR32Float;
+
+    case Format::R16G16B16A16_FLOAT:        return PixelFormatRGBA16Float;
+    case Format::R16G16_FLOAT:              return PixelFormatRG16Float;
+    case Format::R16_FLOAT:                 return PixelFormatR16Float;
+
+    case Format::R32G32B32A32_UINT:         return PixelFormatRGBA32Uint;
+    case Format::R32G32B32_UINT:            return PixelFormatInvalid;
+    case Format::R32G32_UINT:               return PixelFormatRG32Uint;
+    case Format::R32_UINT:                  return PixelFormatR32Uint;
+
+    case Format::R16G16B16A16_UINT:         return PixelFormatRGBA16Uint;
+    case Format::R16G16_UINT:               return PixelFormatRG16Uint;
+    case Format::R16_UINT:                  return PixelFormatR16Uint;
+
+    case Format::R8G8B8A8_UINT:             return PixelFormatRGBA8Uint;
+    case Format::R8G8_UINT:                 return PixelFormatRG8Uint;
+    case Format::R8_UINT:                   return PixelFormatR8Uint;
+
+    case Format::R32G32B32A32_SINT:         return PixelFormatRGBA32Sint;
+    case Format::R32G32B32_SINT:            return PixelFormatInvalid;
+    case Format::R32G32_SINT:               return PixelFormatRG32Sint;
+    case Format::R32_SINT:                  return PixelFormatR32Sint;
+
+    case Format::R16G16B16A16_SINT:         return PixelFormatRGBA16Sint;
+    case Format::R16G16_SINT:               return PixelFormatRG16Sint;
+    case Format::R16_SINT:                  return PixelFormatR16Sint;
+
+    case Format::R8G8B8A8_SINT:             return PixelFormatRGBA8Sint;
+    case Format::R8G8_SINT:                 return PixelFormatRG8Sint;
+    case Format::R8_SINT:                   return PixelFormatR8Sint;
+
+    case Format::R16G16B16A16_UNORM:        return PixelFormatRGBA16Unorm;
+    case Format::R16G16_UNORM:              return PixelFormatRG16Unorm;
+    case Format::R16_UNORM:                 return PixelFormatR16Unorm;
+
+    case Format::R8G8B8A8_UNORM:            return PixelFormatRGBA8Unorm;
+    case Format::R8G8B8A8_UNORM_SRGB:       return PixelFormatRGBA8Unorm_sRGB;
+    case Format::R8G8_UNORM:                return PixelFormatRG8Unorm;
+    case Format::R8_UNORM:                  return PixelFormatR8Unorm;
+    case Format::B8G8R8A8_UNORM:            return PixelFormatBGRA8Unorm;
+    case Format::B8G8R8A8_UNORM_SRGB:       return PixelFormatBGRA8Unorm_sRGB;
+    case Format::B8G8R8X8_UNORM:            return PixelFormatInvalid;
+    case Format::B8G8R8X8_UNORM_SRGB:       return PixelFormatInvalid;
+
+    case Format::R16G16B16A16_SNORM:        return PixelFormatRGBA16Snorm;
+    case Format::R16G16_SNORM:              return PixelFormatRG16Snorm;
+    case Format::R16_SNORM:                 return PixelFormatR16Snorm;
+
+    case Format::R8G8B8A8_SNORM:            return PixelFormatRGBA8Snorm;
+    case Format::R8G8_SNORM:                return PixelFormatRG8Snorm;
+    case Format::R8_SNORM:                  return PixelFormatR8Snorm;
+
+    case Format::D32_FLOAT:                 return PixelFormatDepth32Float;
+    case Format::D16_UNORM:                 return PixelFormatDepth16Unorm;
+    case Format::D32_FLOAT_S8_UINT:         return PixelFormatDepth32Float_Stencil8;
+    case Format::R32_FLOAT_X32_TYPELESS:    return PixelFormatInvalid;
+
+    case Format::B4G4R4A4_UNORM:            return PixelFormatABGR4Unorm;
+    case Format::B5G6R5_UNORM:              return PixelFormatB5G6R5Unorm;
+    case Format::B5G5R5A1_UNORM:            return PixelFormatA1BGR5Unorm;
+
+    case Format::R9G9B9E5_SHAREDEXP:        return PixelFormatRGB9E5Float;
+    case Format::R10G10B10A2_TYPELESS:      return PixelFormatInvalid;
+    case Format::R10G10B10A2_UINT:          return PixelFormatRGB10A2Uint;
+    case Format::R10G10B10A2_UNORM:         return PixelFormatRGB10A2Unorm;
+    case Format::R11G11B10_FLOAT:           return PixelFormatRG11B10Float;
+
+    case Format::BC1_UNORM:                 return PixelFormatBC1_RGBA;
+    case Format::BC1_UNORM_SRGB:            return PixelFormatBC1_RGBA_sRGB;
+    case Format::BC2_UNORM:                 return PixelFormatBC2_RGBA;
+    case Format::BC2_UNORM_SRGB:            return PixelFormatBC2_RGBA_sRGB;
+    case Format::BC3_UNORM:                 return PixelFormatBC3_RGBA;
+    case Format::BC3_UNORM_SRGB:            return PixelFormatBC3_RGBA_sRGB;
+    case Format::BC4_UNORM:                 return PixelFormatBC4_RUnorm;
+    case Format::BC4_SNORM:                 return PixelFormatBC4_RSnorm;
+    case Format::BC5_UNORM:                 return PixelFormatBC5_RGUnorm;
+    case Format::BC5_SNORM:                 return PixelFormatBC5_RGSnorm;
+    case Format::BC6H_UF16:                 return PixelFormatBC6H_RGBUfloat;
+    case Format::BC6H_SF16:                 return PixelFormatBC6H_RGBFloat;
+    case Format::BC7_UNORM:                 return PixelFormatBC7_RGBAUnorm;
+    case Format::BC7_UNORM_SRGB:            return PixelFormatBC7_RGBAUnorm_sRGB;
+
+    default:                                return PixelFormatInvalid;
+    }
+}
+
+} // namespace gfx