// Copyright 2020 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "dawn/utils/TextureUtils.h"

namespace utils {
bool TextureFormatSupportsStorageTexture(wgpu::TextureFormat format) {
    switch (format) {
        case wgpu::TextureFormat::R32Uint:
        case wgpu::TextureFormat::R32Sint:
        case wgpu::TextureFormat::R32Float:
        case wgpu::TextureFormat::RGBA8Unorm:
        case wgpu::TextureFormat::RGBA8Snorm:
        case wgpu::TextureFormat::RGBA8Uint:
        case wgpu::TextureFormat::RGBA8Sint:
        case wgpu::TextureFormat::RG32Uint:
        case wgpu::TextureFormat::RG32Sint:
        case wgpu::TextureFormat::RG32Float:
        case wgpu::TextureFormat::RGBA16Uint:
        case wgpu::TextureFormat::RGBA16Sint:
        case wgpu::TextureFormat::RGBA16Float:
        case wgpu::TextureFormat::RGBA32Uint:
        case wgpu::TextureFormat::RGBA32Sint:
        case wgpu::TextureFormat::RGBA32Float:
            return true;

        default:
            return false;
    }
}

bool IsBCTextureFormat(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::BC1RGBAUnorm:
        case wgpu::TextureFormat::BC1RGBAUnormSrgb:
        case wgpu::TextureFormat::BC4RUnorm:
        case wgpu::TextureFormat::BC4RSnorm:
        case wgpu::TextureFormat::BC2RGBAUnorm:
        case wgpu::TextureFormat::BC2RGBAUnormSrgb:
        case wgpu::TextureFormat::BC3RGBAUnorm:
        case wgpu::TextureFormat::BC3RGBAUnormSrgb:
        case wgpu::TextureFormat::BC5RGUnorm:
        case wgpu::TextureFormat::BC5RGSnorm:
        case wgpu::TextureFormat::BC6HRGBUfloat:
        case wgpu::TextureFormat::BC6HRGBFloat:
        case wgpu::TextureFormat::BC7RGBAUnorm:
        case wgpu::TextureFormat::BC7RGBAUnormSrgb:
            return true;

        default:
            return false;
    }
}

bool IsETC2TextureFormat(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::ETC2RGB8Unorm:
        case wgpu::TextureFormat::ETC2RGB8UnormSrgb:
        case wgpu::TextureFormat::ETC2RGB8A1Unorm:
        case wgpu::TextureFormat::ETC2RGB8A1UnormSrgb:
        case wgpu::TextureFormat::EACR11Unorm:
        case wgpu::TextureFormat::EACR11Snorm:
        case wgpu::TextureFormat::ETC2RGBA8Unorm:
        case wgpu::TextureFormat::ETC2RGBA8UnormSrgb:
        case wgpu::TextureFormat::EACRG11Unorm:
        case wgpu::TextureFormat::EACRG11Snorm:
            return true;

        default:
            return false;
    }
}

bool IsASTCTextureFormat(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::ASTC4x4Unorm:
        case wgpu::TextureFormat::ASTC4x4UnormSrgb:
        case wgpu::TextureFormat::ASTC5x4Unorm:
        case wgpu::TextureFormat::ASTC5x4UnormSrgb:
        case wgpu::TextureFormat::ASTC5x5Unorm:
        case wgpu::TextureFormat::ASTC5x5UnormSrgb:
        case wgpu::TextureFormat::ASTC6x5Unorm:
        case wgpu::TextureFormat::ASTC6x5UnormSrgb:
        case wgpu::TextureFormat::ASTC6x6Unorm:
        case wgpu::TextureFormat::ASTC6x6UnormSrgb:
        case wgpu::TextureFormat::ASTC8x5Unorm:
        case wgpu::TextureFormat::ASTC8x5UnormSrgb:
        case wgpu::TextureFormat::ASTC8x6Unorm:
        case wgpu::TextureFormat::ASTC8x6UnormSrgb:
        case wgpu::TextureFormat::ASTC8x8Unorm:
        case wgpu::TextureFormat::ASTC8x8UnormSrgb:
        case wgpu::TextureFormat::ASTC10x5Unorm:
        case wgpu::TextureFormat::ASTC10x5UnormSrgb:
        case wgpu::TextureFormat::ASTC10x6Unorm:
        case wgpu::TextureFormat::ASTC10x6UnormSrgb:
        case wgpu::TextureFormat::ASTC10x8Unorm:
        case wgpu::TextureFormat::ASTC10x8UnormSrgb:
        case wgpu::TextureFormat::ASTC10x10Unorm:
        case wgpu::TextureFormat::ASTC10x10UnormSrgb:
        case wgpu::TextureFormat::ASTC12x10Unorm:
        case wgpu::TextureFormat::ASTC12x10UnormSrgb:
        case wgpu::TextureFormat::ASTC12x12Unorm:
        case wgpu::TextureFormat::ASTC12x12UnormSrgb:
            return true;

        default:
            return false;
    }
}

bool IsDepthOnlyFormat(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::Depth16Unorm:
        case wgpu::TextureFormat::Depth24Plus:
        case wgpu::TextureFormat::Depth32Float:
            return true;
        default:
            return false;
    }
}

bool IsDepthOrStencilFormat(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::Depth16Unorm:
        case wgpu::TextureFormat::Depth24Plus:
        case wgpu::TextureFormat::Depth32Float:
        case wgpu::TextureFormat::Depth24PlusStencil8:
        case wgpu::TextureFormat::Depth32FloatStencil8:
        case wgpu::TextureFormat::Stencil8:
            return true;
        default:
            return false;
    }
}

bool TextureFormatSupportsMultisampling(wgpu::TextureFormat textureFormat) {
    if (IsBCTextureFormat(textureFormat) || IsETC2TextureFormat(textureFormat) ||
        IsASTCTextureFormat(textureFormat)) {
        return false;
    }

    switch (textureFormat) {
        case wgpu::TextureFormat::R32Uint:
        case wgpu::TextureFormat::R32Sint:
        case wgpu::TextureFormat::RG32Uint:
        case wgpu::TextureFormat::RG32Sint:
        case wgpu::TextureFormat::RG32Float:
        case wgpu::TextureFormat::RGBA32Uint:
        case wgpu::TextureFormat::RGBA32Sint:
        case wgpu::TextureFormat::RGBA32Float:
        case wgpu::TextureFormat::RGB9E5Ufloat:
        case wgpu::TextureFormat::R8Snorm:
        case wgpu::TextureFormat::RG8Snorm:
        case wgpu::TextureFormat::RGBA8Snorm:
        case wgpu::TextureFormat::RG11B10Ufloat:
            return false;

        default:
            return true;
    }
}

bool TextureFormatSupportsResolveTarget(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::R8Unorm:
        case wgpu::TextureFormat::RG8Unorm:
        case wgpu::TextureFormat::RGBA8Unorm:
        case wgpu::TextureFormat::RGBA8UnormSrgb:
        case wgpu::TextureFormat::BGRA8Unorm:
        case wgpu::TextureFormat::BGRA8UnormSrgb:
        case wgpu::TextureFormat::R16Float:
        case wgpu::TextureFormat::RG16Float:
        case wgpu::TextureFormat::RGBA16Float:
        case wgpu::TextureFormat::RGB10A2Unorm:
            return true;

        default:
            return false;
    }
}

bool IsStencilOnlyFormat(wgpu::TextureFormat textureFormat) {
    return textureFormat == wgpu::TextureFormat::Stencil8;
}

uint32_t GetTexelBlockSizeInBytes(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::R8Unorm:
        case wgpu::TextureFormat::R8Snorm:
        case wgpu::TextureFormat::R8Uint:
        case wgpu::TextureFormat::R8Sint:
        case wgpu::TextureFormat::Stencil8:
            return 1u;

        case wgpu::TextureFormat::R16Uint:
        case wgpu::TextureFormat::R16Sint:
        case wgpu::TextureFormat::R16Float:
        case wgpu::TextureFormat::RG8Unorm:
        case wgpu::TextureFormat::RG8Snorm:
        case wgpu::TextureFormat::RG8Uint:
        case wgpu::TextureFormat::RG8Sint:
            return 2u;

        case wgpu::TextureFormat::R32Float:
        case wgpu::TextureFormat::R32Uint:
        case wgpu::TextureFormat::R32Sint:
        case wgpu::TextureFormat::RG16Uint:
        case wgpu::TextureFormat::RG16Sint:
        case wgpu::TextureFormat::RG16Float:
        case wgpu::TextureFormat::RGBA8Unorm:
        case wgpu::TextureFormat::RGBA8UnormSrgb:
        case wgpu::TextureFormat::RGBA8Snorm:
        case wgpu::TextureFormat::RGBA8Uint:
        case wgpu::TextureFormat::RGBA8Sint:
        case wgpu::TextureFormat::BGRA8Unorm:
        case wgpu::TextureFormat::BGRA8UnormSrgb:
        case wgpu::TextureFormat::RGB10A2Unorm:
        case wgpu::TextureFormat::RG11B10Ufloat:
        case wgpu::TextureFormat::RGB9E5Ufloat:
            return 4u;

        case wgpu::TextureFormat::RG32Float:
        case wgpu::TextureFormat::RG32Uint:
        case wgpu::TextureFormat::RG32Sint:
        case wgpu::TextureFormat::RGBA16Uint:
        case wgpu::TextureFormat::RGBA16Sint:
        case wgpu::TextureFormat::RGBA16Float:
            return 8u;

        case wgpu::TextureFormat::RGBA32Float:
        case wgpu::TextureFormat::RGBA32Uint:
        case wgpu::TextureFormat::RGBA32Sint:
            return 16u;

        case wgpu::TextureFormat::Depth16Unorm:
            return 2u;

        case wgpu::TextureFormat::Depth24Plus:
        case wgpu::TextureFormat::Depth32Float:
            return 4u;

        case wgpu::TextureFormat::BC1RGBAUnorm:
        case wgpu::TextureFormat::BC1RGBAUnormSrgb:
        case wgpu::TextureFormat::BC4RUnorm:
        case wgpu::TextureFormat::BC4RSnorm:
            return 8u;

        case wgpu::TextureFormat::BC2RGBAUnorm:
        case wgpu::TextureFormat::BC2RGBAUnormSrgb:
        case wgpu::TextureFormat::BC3RGBAUnorm:
        case wgpu::TextureFormat::BC3RGBAUnormSrgb:
        case wgpu::TextureFormat::BC5RGUnorm:
        case wgpu::TextureFormat::BC5RGSnorm:
        case wgpu::TextureFormat::BC6HRGBUfloat:
        case wgpu::TextureFormat::BC6HRGBFloat:
        case wgpu::TextureFormat::BC7RGBAUnorm:
        case wgpu::TextureFormat::BC7RGBAUnormSrgb:
            return 16u;

        case wgpu::TextureFormat::ETC2RGB8Unorm:
        case wgpu::TextureFormat::ETC2RGB8UnormSrgb:
        case wgpu::TextureFormat::ETC2RGB8A1Unorm:
        case wgpu::TextureFormat::ETC2RGB8A1UnormSrgb:
        case wgpu::TextureFormat::EACR11Unorm:
        case wgpu::TextureFormat::EACR11Snorm:
            return 8u;

        case wgpu::TextureFormat::ETC2RGBA8Unorm:
        case wgpu::TextureFormat::ETC2RGBA8UnormSrgb:
        case wgpu::TextureFormat::EACRG11Unorm:
        case wgpu::TextureFormat::EACRG11Snorm:
            return 16u;

        case wgpu::TextureFormat::ASTC4x4Unorm:
        case wgpu::TextureFormat::ASTC4x4UnormSrgb:
        case wgpu::TextureFormat::ASTC5x4Unorm:
        case wgpu::TextureFormat::ASTC5x4UnormSrgb:
        case wgpu::TextureFormat::ASTC5x5Unorm:
        case wgpu::TextureFormat::ASTC5x5UnormSrgb:
        case wgpu::TextureFormat::ASTC6x5Unorm:
        case wgpu::TextureFormat::ASTC6x5UnormSrgb:
        case wgpu::TextureFormat::ASTC6x6Unorm:
        case wgpu::TextureFormat::ASTC6x6UnormSrgb:
        case wgpu::TextureFormat::ASTC8x5Unorm:
        case wgpu::TextureFormat::ASTC8x5UnormSrgb:
        case wgpu::TextureFormat::ASTC8x6Unorm:
        case wgpu::TextureFormat::ASTC8x6UnormSrgb:
        case wgpu::TextureFormat::ASTC8x8Unorm:
        case wgpu::TextureFormat::ASTC8x8UnormSrgb:
        case wgpu::TextureFormat::ASTC10x5Unorm:
        case wgpu::TextureFormat::ASTC10x5UnormSrgb:
        case wgpu::TextureFormat::ASTC10x6Unorm:
        case wgpu::TextureFormat::ASTC10x6UnormSrgb:
        case wgpu::TextureFormat::ASTC10x8Unorm:
        case wgpu::TextureFormat::ASTC10x8UnormSrgb:
        case wgpu::TextureFormat::ASTC10x10Unorm:
        case wgpu::TextureFormat::ASTC10x10UnormSrgb:
        case wgpu::TextureFormat::ASTC12x10Unorm:
        case wgpu::TextureFormat::ASTC12x10UnormSrgb:
        case wgpu::TextureFormat::ASTC12x12Unorm:
        case wgpu::TextureFormat::ASTC12x12UnormSrgb:
            return 16u;

        case wgpu::TextureFormat::Depth24PlusStencil8:
        case wgpu::TextureFormat::Depth32FloatStencil8:

        // Block size of a multi-planar format depends on aspect.
        case wgpu::TextureFormat::R8BG8Biplanar420Unorm:

        case wgpu::TextureFormat::Undefined:
            break;
    }
    UNREACHABLE();
}

uint32_t GetTextureFormatBlockWidth(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::R8Unorm:
        case wgpu::TextureFormat::R8Snorm:
        case wgpu::TextureFormat::R8Uint:
        case wgpu::TextureFormat::R8Sint:
        case wgpu::TextureFormat::R16Uint:
        case wgpu::TextureFormat::R16Sint:
        case wgpu::TextureFormat::R16Float:
        case wgpu::TextureFormat::RG8Unorm:
        case wgpu::TextureFormat::RG8Snorm:
        case wgpu::TextureFormat::RG8Uint:
        case wgpu::TextureFormat::RG8Sint:
        case wgpu::TextureFormat::R32Float:
        case wgpu::TextureFormat::R32Uint:
        case wgpu::TextureFormat::R32Sint:
        case wgpu::TextureFormat::RG16Uint:
        case wgpu::TextureFormat::RG16Sint:
        case wgpu::TextureFormat::RG16Float:
        case wgpu::TextureFormat::RGBA8Unorm:
        case wgpu::TextureFormat::RGBA8UnormSrgb:
        case wgpu::TextureFormat::RGBA8Snorm:
        case wgpu::TextureFormat::RGBA8Uint:
        case wgpu::TextureFormat::RGBA8Sint:
        case wgpu::TextureFormat::BGRA8Unorm:
        case wgpu::TextureFormat::BGRA8UnormSrgb:
        case wgpu::TextureFormat::RGB10A2Unorm:
        case wgpu::TextureFormat::RG11B10Ufloat:
        case wgpu::TextureFormat::RGB9E5Ufloat:
        case wgpu::TextureFormat::RG32Float:
        case wgpu::TextureFormat::RG32Uint:
        case wgpu::TextureFormat::RG32Sint:
        case wgpu::TextureFormat::RGBA16Uint:
        case wgpu::TextureFormat::RGBA16Sint:
        case wgpu::TextureFormat::RGBA16Float:
        case wgpu::TextureFormat::RGBA32Float:
        case wgpu::TextureFormat::RGBA32Uint:
        case wgpu::TextureFormat::RGBA32Sint:
        case wgpu::TextureFormat::Depth32Float:
        case wgpu::TextureFormat::Depth24Plus:
        case wgpu::TextureFormat::Depth24PlusStencil8:
        case wgpu::TextureFormat::Depth16Unorm:
        case wgpu::TextureFormat::Depth32FloatStencil8:
        case wgpu::TextureFormat::Stencil8:
            return 1u;

        case wgpu::TextureFormat::BC1RGBAUnorm:
        case wgpu::TextureFormat::BC1RGBAUnormSrgb:
        case wgpu::TextureFormat::BC4RUnorm:
        case wgpu::TextureFormat::BC4RSnorm:
        case wgpu::TextureFormat::BC2RGBAUnorm:
        case wgpu::TextureFormat::BC2RGBAUnormSrgb:
        case wgpu::TextureFormat::BC3RGBAUnorm:
        case wgpu::TextureFormat::BC3RGBAUnormSrgb:
        case wgpu::TextureFormat::BC5RGUnorm:
        case wgpu::TextureFormat::BC5RGSnorm:
        case wgpu::TextureFormat::BC6HRGBUfloat:
        case wgpu::TextureFormat::BC6HRGBFloat:
        case wgpu::TextureFormat::BC7RGBAUnorm:
        case wgpu::TextureFormat::BC7RGBAUnormSrgb:
        case wgpu::TextureFormat::ETC2RGB8Unorm:
        case wgpu::TextureFormat::ETC2RGB8UnormSrgb:
        case wgpu::TextureFormat::ETC2RGB8A1Unorm:
        case wgpu::TextureFormat::ETC2RGB8A1UnormSrgb:
        case wgpu::TextureFormat::ETC2RGBA8Unorm:
        case wgpu::TextureFormat::ETC2RGBA8UnormSrgb:
        case wgpu::TextureFormat::EACR11Unorm:
        case wgpu::TextureFormat::EACR11Snorm:
        case wgpu::TextureFormat::EACRG11Unorm:
        case wgpu::TextureFormat::EACRG11Snorm:
            return 4u;

        case wgpu::TextureFormat::ASTC4x4Unorm:
        case wgpu::TextureFormat::ASTC4x4UnormSrgb:
            return 4u;
        case wgpu::TextureFormat::ASTC5x4Unorm:
        case wgpu::TextureFormat::ASTC5x4UnormSrgb:
        case wgpu::TextureFormat::ASTC5x5Unorm:
        case wgpu::TextureFormat::ASTC5x5UnormSrgb:
            return 5u;
        case wgpu::TextureFormat::ASTC6x5Unorm:
        case wgpu::TextureFormat::ASTC6x5UnormSrgb:
        case wgpu::TextureFormat::ASTC6x6Unorm:
        case wgpu::TextureFormat::ASTC6x6UnormSrgb:
            return 6u;
        case wgpu::TextureFormat::ASTC8x5Unorm:
        case wgpu::TextureFormat::ASTC8x5UnormSrgb:
        case wgpu::TextureFormat::ASTC8x6Unorm:
        case wgpu::TextureFormat::ASTC8x6UnormSrgb:
        case wgpu::TextureFormat::ASTC8x8Unorm:
        case wgpu::TextureFormat::ASTC8x8UnormSrgb:
            return 8u;
        case wgpu::TextureFormat::ASTC10x5Unorm:
        case wgpu::TextureFormat::ASTC10x5UnormSrgb:
        case wgpu::TextureFormat::ASTC10x6Unorm:
        case wgpu::TextureFormat::ASTC10x6UnormSrgb:
        case wgpu::TextureFormat::ASTC10x8Unorm:
        case wgpu::TextureFormat::ASTC10x8UnormSrgb:
        case wgpu::TextureFormat::ASTC10x10Unorm:
        case wgpu::TextureFormat::ASTC10x10UnormSrgb:
            return 10u;
        case wgpu::TextureFormat::ASTC12x10Unorm:
        case wgpu::TextureFormat::ASTC12x10UnormSrgb:
        case wgpu::TextureFormat::ASTC12x12Unorm:
        case wgpu::TextureFormat::ASTC12x12UnormSrgb:
            return 12u;

        // Block size of a multi-planar format depends on aspect.
        case wgpu::TextureFormat::R8BG8Biplanar420Unorm:

        case wgpu::TextureFormat::Undefined:
            break;
    }
    UNREACHABLE();
}

uint32_t GetTextureFormatBlockHeight(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::R8Unorm:
        case wgpu::TextureFormat::R8Snorm:
        case wgpu::TextureFormat::R8Uint:
        case wgpu::TextureFormat::R8Sint:
        case wgpu::TextureFormat::R16Uint:
        case wgpu::TextureFormat::R16Sint:
        case wgpu::TextureFormat::R16Float:
        case wgpu::TextureFormat::RG8Unorm:
        case wgpu::TextureFormat::RG8Snorm:
        case wgpu::TextureFormat::RG8Uint:
        case wgpu::TextureFormat::RG8Sint:
        case wgpu::TextureFormat::R32Float:
        case wgpu::TextureFormat::R32Uint:
        case wgpu::TextureFormat::R32Sint:
        case wgpu::TextureFormat::RG16Uint:
        case wgpu::TextureFormat::RG16Sint:
        case wgpu::TextureFormat::RG16Float:
        case wgpu::TextureFormat::RGBA8Unorm:
        case wgpu::TextureFormat::RGBA8UnormSrgb:
        case wgpu::TextureFormat::RGBA8Snorm:
        case wgpu::TextureFormat::RGBA8Uint:
        case wgpu::TextureFormat::RGBA8Sint:
        case wgpu::TextureFormat::BGRA8Unorm:
        case wgpu::TextureFormat::BGRA8UnormSrgb:
        case wgpu::TextureFormat::RGB10A2Unorm:
        case wgpu::TextureFormat::RG11B10Ufloat:
        case wgpu::TextureFormat::RGB9E5Ufloat:
        case wgpu::TextureFormat::RG32Float:
        case wgpu::TextureFormat::RG32Uint:
        case wgpu::TextureFormat::RG32Sint:
        case wgpu::TextureFormat::RGBA16Uint:
        case wgpu::TextureFormat::RGBA16Sint:
        case wgpu::TextureFormat::RGBA16Float:
        case wgpu::TextureFormat::RGBA32Float:
        case wgpu::TextureFormat::RGBA32Uint:
        case wgpu::TextureFormat::RGBA32Sint:
        case wgpu::TextureFormat::Depth32Float:
        case wgpu::TextureFormat::Depth24Plus:
        case wgpu::TextureFormat::Depth24PlusStencil8:
        case wgpu::TextureFormat::Depth16Unorm:
        case wgpu::TextureFormat::Depth32FloatStencil8:
        case wgpu::TextureFormat::Stencil8:
            return 1u;

        case wgpu::TextureFormat::BC1RGBAUnorm:
        case wgpu::TextureFormat::BC1RGBAUnormSrgb:
        case wgpu::TextureFormat::BC4RUnorm:
        case wgpu::TextureFormat::BC4RSnorm:
        case wgpu::TextureFormat::BC2RGBAUnorm:
        case wgpu::TextureFormat::BC2RGBAUnormSrgb:
        case wgpu::TextureFormat::BC3RGBAUnorm:
        case wgpu::TextureFormat::BC3RGBAUnormSrgb:
        case wgpu::TextureFormat::BC5RGUnorm:
        case wgpu::TextureFormat::BC5RGSnorm:
        case wgpu::TextureFormat::BC6HRGBUfloat:
        case wgpu::TextureFormat::BC6HRGBFloat:
        case wgpu::TextureFormat::BC7RGBAUnorm:
        case wgpu::TextureFormat::BC7RGBAUnormSrgb:
        case wgpu::TextureFormat::ETC2RGB8Unorm:
        case wgpu::TextureFormat::ETC2RGB8UnormSrgb:
        case wgpu::TextureFormat::ETC2RGB8A1Unorm:
        case wgpu::TextureFormat::ETC2RGB8A1UnormSrgb:
        case wgpu::TextureFormat::ETC2RGBA8Unorm:
        case wgpu::TextureFormat::ETC2RGBA8UnormSrgb:
        case wgpu::TextureFormat::EACR11Unorm:
        case wgpu::TextureFormat::EACR11Snorm:
        case wgpu::TextureFormat::EACRG11Unorm:
        case wgpu::TextureFormat::EACRG11Snorm:
            return 4u;

        case wgpu::TextureFormat::ASTC4x4Unorm:
        case wgpu::TextureFormat::ASTC4x4UnormSrgb:
        case wgpu::TextureFormat::ASTC5x4Unorm:
        case wgpu::TextureFormat::ASTC5x4UnormSrgb:
            return 4u;
        case wgpu::TextureFormat::ASTC5x5Unorm:
        case wgpu::TextureFormat::ASTC5x5UnormSrgb:
        case wgpu::TextureFormat::ASTC6x5Unorm:
        case wgpu::TextureFormat::ASTC6x5UnormSrgb:
        case wgpu::TextureFormat::ASTC8x5Unorm:
        case wgpu::TextureFormat::ASTC8x5UnormSrgb:
        case wgpu::TextureFormat::ASTC10x5Unorm:
        case wgpu::TextureFormat::ASTC10x5UnormSrgb:
            return 5u;
        case wgpu::TextureFormat::ASTC6x6Unorm:
        case wgpu::TextureFormat::ASTC6x6UnormSrgb:
        case wgpu::TextureFormat::ASTC8x6Unorm:
        case wgpu::TextureFormat::ASTC8x6UnormSrgb:
        case wgpu::TextureFormat::ASTC10x6Unorm:
        case wgpu::TextureFormat::ASTC10x6UnormSrgb:
            return 6u;
        case wgpu::TextureFormat::ASTC8x8Unorm:
        case wgpu::TextureFormat::ASTC8x8UnormSrgb:
        case wgpu::TextureFormat::ASTC10x8Unorm:
        case wgpu::TextureFormat::ASTC10x8UnormSrgb:
            return 8u;
        case wgpu::TextureFormat::ASTC10x10Unorm:
        case wgpu::TextureFormat::ASTC10x10UnormSrgb:
        case wgpu::TextureFormat::ASTC12x10Unorm:
        case wgpu::TextureFormat::ASTC12x10UnormSrgb:
            return 10u;
        case wgpu::TextureFormat::ASTC12x12Unorm:
        case wgpu::TextureFormat::ASTC12x12UnormSrgb:
            return 12u;

        // Block size of a multi-planar format depends on aspect.
        case wgpu::TextureFormat::R8BG8Biplanar420Unorm:

        case wgpu::TextureFormat::Undefined:
            break;
    }
    UNREACHABLE();
}

const char* GetWGSLColorTextureComponentType(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::R8Unorm:
        case wgpu::TextureFormat::R8Snorm:
        case wgpu::TextureFormat::R16Float:
        case wgpu::TextureFormat::RG8Unorm:
        case wgpu::TextureFormat::RG8Snorm:
        case wgpu::TextureFormat::R32Float:
        case wgpu::TextureFormat::RG16Float:
        case wgpu::TextureFormat::RGBA8Unorm:
        case wgpu::TextureFormat::RGBA8Snorm:
        case wgpu::TextureFormat::RGB10A2Unorm:
        case wgpu::TextureFormat::RG11B10Ufloat:
        case wgpu::TextureFormat::RGB9E5Ufloat:
        case wgpu::TextureFormat::RG32Float:
        case wgpu::TextureFormat::RGBA16Float:
        case wgpu::TextureFormat::RGBA32Float:
        case wgpu::TextureFormat::BGRA8Unorm:
        case wgpu::TextureFormat::BGRA8UnormSrgb:
        case wgpu::TextureFormat::RGBA8UnormSrgb:
            return "f32";

        case wgpu::TextureFormat::R8Uint:
        case wgpu::TextureFormat::R16Uint:
        case wgpu::TextureFormat::RG8Uint:
        case wgpu::TextureFormat::R32Uint:
        case wgpu::TextureFormat::RG16Uint:
        case wgpu::TextureFormat::RGBA8Uint:
        case wgpu::TextureFormat::RG32Uint:
        case wgpu::TextureFormat::RGBA16Uint:
        case wgpu::TextureFormat::RGBA32Uint:
            return "u32";

        case wgpu::TextureFormat::R8Sint:
        case wgpu::TextureFormat::R16Sint:
        case wgpu::TextureFormat::RG8Sint:
        case wgpu::TextureFormat::R32Sint:
        case wgpu::TextureFormat::RG16Sint:
        case wgpu::TextureFormat::RGBA8Sint:
        case wgpu::TextureFormat::RG32Sint:
        case wgpu::TextureFormat::RGBA16Sint:
        case wgpu::TextureFormat::RGBA32Sint:
            return "i32";

        default:
            UNREACHABLE();
    }
}

uint32_t GetWGSLRenderableColorTextureComponentCount(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::R8Unorm:
        case wgpu::TextureFormat::R8Uint:
        case wgpu::TextureFormat::R8Sint:
        case wgpu::TextureFormat::R16Uint:
        case wgpu::TextureFormat::R16Sint:
        case wgpu::TextureFormat::R16Float:
        case wgpu::TextureFormat::R32Float:
        case wgpu::TextureFormat::R32Uint:
        case wgpu::TextureFormat::R32Sint:
            return 1u;
        case wgpu::TextureFormat::RG8Unorm:
        case wgpu::TextureFormat::RG8Uint:
        case wgpu::TextureFormat::RG8Sint:
        case wgpu::TextureFormat::RG16Uint:
        case wgpu::TextureFormat::RG16Sint:
        case wgpu::TextureFormat::RG16Float:
        case wgpu::TextureFormat::RG32Float:
        case wgpu::TextureFormat::RG32Uint:
        case wgpu::TextureFormat::RG32Sint:
            return 2u;
        case wgpu::TextureFormat::RGBA8Unorm:
        case wgpu::TextureFormat::RGBA8UnormSrgb:
        case wgpu::TextureFormat::RGBA8Uint:
        case wgpu::TextureFormat::RGBA8Sint:
        case wgpu::TextureFormat::BGRA8Unorm:
        case wgpu::TextureFormat::BGRA8UnormSrgb:
        case wgpu::TextureFormat::RGB10A2Unorm:
        case wgpu::TextureFormat::RGBA16Uint:
        case wgpu::TextureFormat::RGBA16Sint:
        case wgpu::TextureFormat::RGBA16Float:
        case wgpu::TextureFormat::RGBA32Float:
        case wgpu::TextureFormat::RGBA32Uint:
        case wgpu::TextureFormat::RGBA32Sint:
            return 4u;
        default:
            UNREACHABLE();
    }
}

const char* GetWGSLImageFormatQualifier(wgpu::TextureFormat textureFormat) {
    switch (textureFormat) {
        case wgpu::TextureFormat::RGBA8Unorm:
            return "rgba8unorm";
        case wgpu::TextureFormat::RGBA8Snorm:
            return "rgba8snorm";
        case wgpu::TextureFormat::RGBA8Uint:
            return "rgba8uint";
        case wgpu::TextureFormat::RGBA8Sint:
            return "rgba8sint";
        case wgpu::TextureFormat::RGBA16Uint:
            return "rgba16uint";
        case wgpu::TextureFormat::RGBA16Sint:
            return "rgba16sint";
        case wgpu::TextureFormat::RGBA16Float:
            return "rgba16float";
        case wgpu::TextureFormat::R32Uint:
            return "r32uint";
        case wgpu::TextureFormat::R32Sint:
            return "r32sint";
        case wgpu::TextureFormat::R32Float:
            return "r32float";
        case wgpu::TextureFormat::RG32Uint:
            return "rg32uint";
        case wgpu::TextureFormat::RG32Sint:
            return "rg32sint";
        case wgpu::TextureFormat::RG32Float:
            return "rg32float";
        case wgpu::TextureFormat::RGBA32Uint:
            return "rgba32uint";
        case wgpu::TextureFormat::RGBA32Sint:
            return "rgba32sint";
        case wgpu::TextureFormat::RGBA32Float:
            return "rgba32float";

        // The below do not currently exist in the WGSL spec, but are used
        // for tests that expect compilation failure.
        case wgpu::TextureFormat::R8Unorm:
            return "r8unorm";
        case wgpu::TextureFormat::R8Snorm:
            return "r8snorm";
        case wgpu::TextureFormat::R8Uint:
            return "r8uint";
        case wgpu::TextureFormat::R8Sint:
            return "r8sint";
        case wgpu::TextureFormat::R16Uint:
            return "r16uint";
        case wgpu::TextureFormat::R16Sint:
            return "r16sint";
        case wgpu::TextureFormat::R16Float:
            return "r16float";
        case wgpu::TextureFormat::RG8Unorm:
            return "rg8unorm";
        case wgpu::TextureFormat::RG8Snorm:
            return "rg8snorm";
        case wgpu::TextureFormat::RG8Uint:
            return "rg8uint";
        case wgpu::TextureFormat::RG8Sint:
            return "rg8sint";
        case wgpu::TextureFormat::RG16Uint:
            return "rg16uint";
        case wgpu::TextureFormat::RG16Sint:
            return "rg16sint";
        case wgpu::TextureFormat::RG16Float:
            return "rg16float";
        case wgpu::TextureFormat::RGB10A2Unorm:
            return "rgb10a2unorm";
        case wgpu::TextureFormat::RG11B10Ufloat:
            return "rg11b10ufloat";

        default:
            UNREACHABLE();
    }
}

wgpu::TextureDimension ViewDimensionToTextureDimension(const wgpu::TextureViewDimension dimension) {
    switch (dimension) {
        case wgpu::TextureViewDimension::e2D:
        case wgpu::TextureViewDimension::e2DArray:
        case wgpu::TextureViewDimension::Cube:
        case wgpu::TextureViewDimension::CubeArray:
            return wgpu::TextureDimension::e2D;
        case wgpu::TextureViewDimension::e3D:
            return wgpu::TextureDimension::e3D;
        // TODO(crbug.com/dawn/814): Implement for 1D texture.
        case wgpu::TextureViewDimension::e1D:
        default:
            UNREACHABLE();
            break;
    }
}

}  // namespace utils