layers/vk_layer_utils.cpp

/* Copyright (c) 2015-2016 The Khronos Group Inc.
 * Copyright (c) 2015-2016 Valve Corporation
 * Copyright (c) 2015-2016 LunarG, Inc.
 *
 * 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.
 *
 * Author: Mark Lobodzinski <mark@lunarg.com>
 *
 */

#include <string.h>
#include <string>
#include <vector>
#include "vulkan/vulkan.h"
#include "vk_layer_config.h"
#include "vk_layer_utils.h"

struct VULKAN_FORMAT_INFO {
    size_t size;
    uint32_t channel_count;
    VkFormatCompatibilityClass format_class;
};

// Set up data structure with number of bytes and number of channels
// for each Vulkan format.
static const VULKAN_FORMAT_INFO vk_format_table[VK_FORMAT_RANGE_SIZE] = {
    {0, 0, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_UNDEFINED]
    {1, 2, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R4G4_UNORM_PACK8]
    {2, 4, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R4G4B4A4_UNORM_PACK16]
    {2, 4, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_B4G4R4A4_UNORM_PACK16]
    {2, 3, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R5G6B5_UNORM_PACK16]
    {2, 3, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_B5G6R5_UNORM_PACK16]
    {2, 4, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R5G5B5A1_UNORM_PACK16]
    {2, 4, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_B5G5R5A1_UNORM_PACK16]
    {2, 4, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_A1R5G5B5_UNORM_PACK16]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R8_UNORM]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R8_SNORM]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R8_USCALED]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R8_SSCALED]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R8_UINT]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R8_SINT]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_8_BIT},             //    [VK_FORMAT_R8_SRGB]
    {2, 2, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R8G8_UNORM]
    {2, 2, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R8G8_SNORM]
    {2, 2, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R8G8_USCALED]
    {2, 2, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R8G8_SSCALED]
    {2, 2, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R8G8_UINT]
    {2, 2, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R8G8_SINT]
    {2, 2, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R8G8_SRGB]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_R8G8B8_UNORM]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_R8G8B8_SNORM]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_R8G8B8_USCALED]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_R8G8B8_SSCALED]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_R8G8B8_UINT]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_R8G8B8_SINT]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_R8G8B8_SRGB]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_B8G8R8_UNORM]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_B8G8R8_SNORM]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_B8G8R8_USCALED]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_B8G8R8_SSCALED]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_B8G8R8_UINT]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_B8G8R8_SINT]
    {3, 3, VK_FORMAT_COMPATIBILITY_CLASS_24_BIT},            //    [VK_FORMAT_B8G8R8_SRGB]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R8G8B8A8_UNORM]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R8G8B8A8_SNORM]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R8G8B8A8_USCALED]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R8G8B8A8_SSCALED]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R8G8B8A8_UINT]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R8G8B8A8_SINT]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R8G8B8A8_SRGB]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_UNORM]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_SNORM]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_USCALED]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_SSCALED]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_UINT]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_SINT]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_SRGB]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A8B8G8R8_UNORM_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A8B8G8R8_SNORM_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A8B8G8R8_USCALED_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A8B8G8R8_SSCALED_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A8B8G8R8_UINT_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A8B8G8R8_SINT_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B8G8R8A8_SRGB_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2R10G10B10_UNORM_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2R10G10B10_SNORM_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2R10G10B10_USCALED_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2R10G10B10_SSCALED_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2R10G10B10_UINT_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2R10G10B10_SINT_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2B10G10R10_UNORM_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2B10G10R10_SNORM_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2B10G10R10_USCALED_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2B10G10R10_SSCALED_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2B10G10R10_UINT_PACK32]
    {4, 4, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_A2B10G10R10_SINT_PACK32]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R16_UNORM]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R16_SNORM]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R16_USCALED]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R16_SSCALED]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R16_UINT]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R16_SINT]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_16_BIT},            //    [VK_FORMAT_R16_SFLOAT]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R16G16_UNORM]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R16G16_SNORM]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R16G16_USCALED]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R16G16_SSCALED]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R16G16_UINT]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R16G16_SINT]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R16G16_SFLOAT]
    {6, 3, VK_FORMAT_COMPATIBILITY_CLASS_48_BIT},            //    [VK_FORMAT_R16G16B16_UNORM]
    {6, 3, VK_FORMAT_COMPATIBILITY_CLASS_48_BIT},            //    [VK_FORMAT_R16G16B16_SNORM]
    {6, 3, VK_FORMAT_COMPATIBILITY_CLASS_48_BIT},            //    [VK_FORMAT_R16G16B16_USCALED]
    {6, 3, VK_FORMAT_COMPATIBILITY_CLASS_48_BIT},            //    [VK_FORMAT_R16G16B16_SSCALED]
    {6, 3, VK_FORMAT_COMPATIBILITY_CLASS_48_BIT},            //    [VK_FORMAT_R16G16B16_UINT]
    {6, 3, VK_FORMAT_COMPATIBILITY_CLASS_48_BIT},            //    [VK_FORMAT_R16G16B16_SINT]
    {6, 3, VK_FORMAT_COMPATIBILITY_CLASS_48_BIT},            //    [VK_FORMAT_R16G16B16_SFLOAT]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R16G16B16A16_UNORM]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R16G16B16A16_SNORM]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R16G16B16A16_USCALED]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R16G16B16A16_SSCALED]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R16G16B16A16_UINT]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R16G16B16A16_SINT]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R16G16B16A16_SFLOAT]
    {4, 1, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R32_UINT]
    {4, 1, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R32_SINT]
    {4, 1, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_R32_SFLOAT]
    {8, 2, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R32G32_UINT]
    {8, 2, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R32G32_SINT]
    {8, 2, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R32G32_SFLOAT]
    {12, 3, VK_FORMAT_COMPATIBILITY_CLASS_96_BIT},           //    [VK_FORMAT_R32G32B32_UINT]
    {12, 3, VK_FORMAT_COMPATIBILITY_CLASS_96_BIT},           //    [VK_FORMAT_R32G32B32_SINT]
    {12, 3, VK_FORMAT_COMPATIBILITY_CLASS_96_BIT},           //    [VK_FORMAT_R32G32B32_SFLOAT]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_128_BIT},          //    [VK_FORMAT_R32G32B32A32_UINT]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_128_BIT},          //    [VK_FORMAT_R32G32B32A32_SINT]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_128_BIT},          //    [VK_FORMAT_R32G32B32A32_SFLOAT]
    {8, 1, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R64_UINT]
    {8, 1, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R64_SINT]
    {8, 1, VK_FORMAT_COMPATIBILITY_CLASS_64_BIT},            //    [VK_FORMAT_R64_SFLOAT]
    {16, 2, VK_FORMAT_COMPATIBILITY_CLASS_128_BIT},          //    [VK_FORMAT_R64G64_UINT]
    {16, 2, VK_FORMAT_COMPATIBILITY_CLASS_128_BIT},          //    [VK_FORMAT_R64G64_SINT]
    {16, 2, VK_FORMAT_COMPATIBILITY_CLASS_128_BIT},          //    [VK_FORMAT_R64G64_SFLOAT]
    {24, 3, VK_FORMAT_COMPATIBILITY_CLASS_192_BIT},          //    [VK_FORMAT_R64G64B64_UINT]
    {24, 3, VK_FORMAT_COMPATIBILITY_CLASS_192_BIT},          //    [VK_FORMAT_R64G64B64_SINT]
    {24, 3, VK_FORMAT_COMPATIBILITY_CLASS_192_BIT},          //    [VK_FORMAT_R64G64B64_SFLOAT]
    {32, 4, VK_FORMAT_COMPATIBILITY_CLASS_256_BIT},          //    [VK_FORMAT_R64G64B64A64_UINT]
    {32, 4, VK_FORMAT_COMPATIBILITY_CLASS_256_BIT},          //    [VK_FORMAT_R64G64B64A64_SINT]
    {32, 4, VK_FORMAT_COMPATIBILITY_CLASS_256_BIT},          //    [VK_FORMAT_R64G64B64A64_SFLOAT]
    {4, 3, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_B10G11R11_UFLOAT_PACK32]
    {4, 3, VK_FORMAT_COMPATIBILITY_CLASS_32_BIT},            //    [VK_FORMAT_E5B9G9R9_UFLOAT_PACK32]
    {2, 1, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_D16_UNORM]
    {3, 1, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_X8_D24_UNORM_PACK32]
    {4, 1, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_D32_SFLOAT]
    {1, 1, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_S8_UINT]
    {3, 2, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_D16_UNORM_S8_UINT]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_D24_UNORM_S8_UINT]
    {4, 2, VK_FORMAT_COMPATIBILITY_CLASS_NONE_BIT},          //    [VK_FORMAT_D32_SFLOAT_S8_UINT]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC1_RGB_BIT},       //    [VK_FORMAT_BC1_RGB_UNORM_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC1_RGB_BIT},       //    [VK_FORMAT_BC1_RGB_SRGB_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC1_RGBA_BIT},      //    [VK_FORMAT_BC1_RGBA_UNORM_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC1_RGBA_BIT},      //    [VK_FORMAT_BC1_RGBA_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC2_BIT},          //    [VK_FORMAT_BC2_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC2_BIT},          //    [VK_FORMAT_BC2_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC3_BIT},          //    [VK_FORMAT_BC3_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC3_BIT},          //    [VK_FORMAT_BC3_SRGB_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC4_BIT},           //    [VK_FORMAT_BC4_UNORM_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC4_BIT},           //    [VK_FORMAT_BC4_SNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC5_BIT},          //    [VK_FORMAT_BC5_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC5_BIT},          //    [VK_FORMAT_BC5_SNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC6H_BIT},         //    [VK_FORMAT_BC6H_UFLOAT_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC6H_BIT},         //    [VK_FORMAT_BC6H_SFLOAT_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC7_BIT},          //    [VK_FORMAT_BC7_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_BC7_BIT},          //    [VK_FORMAT_BC7_SRGB_BLOCK]
    {8, 3, VK_FORMAT_COMPATIBILITY_CLASS_ETC2_RGB_BIT},      //    [VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK]
    {8, 3, VK_FORMAT_COMPATIBILITY_CLASS_ETC2_RGB_BIT},      //    [VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_ETC2_RGBA_BIT},     //    [VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_ETC2_RGBA_BIT},     //    [VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_ETC2_EAC_RGBA_BIT}, //    [VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK]
    {8, 4, VK_FORMAT_COMPATIBILITY_CLASS_ETC2_EAC_RGBA_BIT}, // [VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK]
    {8, 1, VK_FORMAT_COMPATIBILITY_CLASS_EAC_R_BIT},         //    [VK_FORMAT_EAC_R11_UNORM_BLOCK]
    {8, 1, VK_FORMAT_COMPATIBILITY_CLASS_EAC_R_BIT},         //    [VK_FORMAT_EAC_R11_SNORM_BLOCK]
    {16, 2, VK_FORMAT_COMPATIBILITY_CLASS_EAC_RG_BIT},       //    [VK_FORMAT_EAC_R11G11_UNORM_BLOCK]
    {16, 2, VK_FORMAT_COMPATIBILITY_CLASS_EAC_RG_BIT},       //    [VK_FORMAT_EAC_R11G11_SNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_4X4_BIT},     //    [VK_FORMAT_ASTC_4x4_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_4X4_BIT},     //    [VK_FORMAT_ASTC_4x4_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_5X4_BIT},     //    [VK_FORMAT_ASTC_5x4_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_5X4_BIT},     //    [VK_FORMAT_ASTC_5x4_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_5X5_BIT},     //    [VK_FORMAT_ASTC_5x5_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_5X5_BIT},     //    [VK_FORMAT_ASTC_5x5_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_6X5_BIT},     //    [VK_FORMAT_ASTC_6x5_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_6X5_BIT},     //    [VK_FORMAT_ASTC_6x5_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_6X6_BIT},     //    [VK_FORMAT_ASTC_6x6_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_6X6_BIT},     //    [VK_FORMAT_ASTC_6x6_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_8X5_BIT},     //    [VK_FORMAT_ASTC_8x5_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_8X5_BIT},     //    [VK_FORMAT_ASTC_8x5_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_8X6_BIT},     //    [VK_FORMAT_ASTC_8x6_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_8X6_BIT},     //    [VK_FORMAT_ASTC_8x6_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_8X8_BIT},     //    [VK_FORMAT_ASTC_8x8_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_8X8_BIT},     //    [VK_FORMAT_ASTC_8x8_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X5_BIT},    //    [VK_FORMAT_ASTC_10x5_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X5_BIT},    //    [VK_FORMAT_ASTC_10x5_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X6_BIT},    //    [VK_FORMAT_ASTC_10x6_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X6_BIT},    //    [VK_FORMAT_ASTC_10x6_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X8_BIT},    //    [VK_FORMAT_ASTC_10x8_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X8_BIT},    //    [VK_FORMAT_ASTC_10x8_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X10_BIT},   //    [VK_FORMAT_ASTC_10x10_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_10X10_BIT},   //    [VK_FORMAT_ASTC_10x10_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_12X10_BIT},   //    [VK_FORMAT_ASTC_12x10_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_12X10_BIT},   //    [VK_FORMAT_ASTC_12x10_SRGB_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_12X12_BIT},   //    [VK_FORMAT_ASTC_12x12_UNORM_BLOCK]
    {16, 4, VK_FORMAT_COMPATIBILITY_CLASS_ASTC_12X12_BIT},   //    [VK_FORMAT_ASTC_12x12_SRGB_BLOCK]
};

// Return true if format is a depth or stencil format
bool vk_format_is_depth_or_stencil(VkFormat format) {
    return (vk_format_is_depth_and_stencil(format) || vk_format_is_depth_only(format) || vk_format_is_stencil_only(format));
}

// Return true if format contains depth and stencil information
bool vk_format_is_depth_and_stencil(VkFormat format) {
    bool is_ds = false;

    switch (format) {
    case VK_FORMAT_D16_UNORM_S8_UINT:
    case VK_FORMAT_D24_UNORM_S8_UINT:
    case VK_FORMAT_D32_SFLOAT_S8_UINT:
        is_ds = true;
        break;
    default:
        break;
    }
    return is_ds;
}

// Return true if format is a stencil-only format
bool vk_format_is_stencil_only(VkFormat format) { return (format == VK_FORMAT_S8_UINT); }

// Return true if format is a depth-only format
bool vk_format_is_depth_only(VkFormat format) {
    bool is_depth = false;

    switch (format) {
    case VK_FORMAT_D16_UNORM:
    case VK_FORMAT_X8_D24_UNORM_PACK32:
    case VK_FORMAT_D32_SFLOAT:
        is_depth = true;
        break;
    default:
        break;
    }

    return is_depth;
}

// Return true if format is of time UNORM
bool vk_format_is_norm(VkFormat format) {
    bool is_norm = false;

    switch (format) {
    case VK_FORMAT_R4G4_UNORM_PACK8:
    case VK_FORMAT_R4G4B4A4_UNORM_PACK16:
    case VK_FORMAT_R5G6B5_UNORM_PACK16:
    case VK_FORMAT_R5G5B5A1_UNORM_PACK16:
    case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
    case VK_FORMAT_R8_UNORM:
    case VK_FORMAT_R8_SNORM:
    case VK_FORMAT_R8G8_UNORM:
    case VK_FORMAT_R8G8_SNORM:
    case VK_FORMAT_R8G8B8_UNORM:
    case VK_FORMAT_R8G8B8_SNORM:
    case VK_FORMAT_R8G8B8A8_UNORM:
    case VK_FORMAT_R8G8B8A8_SNORM:
    case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
    case VK_FORMAT_A8B8G8R8_SNORM_PACK32:
    case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
    case VK_FORMAT_A2B10G10R10_SNORM_PACK32:
    case VK_FORMAT_R16_UNORM:
    case VK_FORMAT_R16_SNORM:
    case VK_FORMAT_R16G16_UNORM:
    case VK_FORMAT_R16G16_SNORM:
    case VK_FORMAT_R16G16B16_UNORM:
    case VK_FORMAT_R16G16B16_SNORM:
    case VK_FORMAT_R16G16B16A16_UNORM:
    case VK_FORMAT_R16G16B16A16_SNORM:
    case VK_FORMAT_BC1_RGB_UNORM_BLOCK:
    case VK_FORMAT_BC2_UNORM_BLOCK:
    case VK_FORMAT_BC3_UNORM_BLOCK:
    case VK_FORMAT_BC4_UNORM_BLOCK:
    case VK_FORMAT_BC4_SNORM_BLOCK:
    case VK_FORMAT_BC5_UNORM_BLOCK:
    case VK_FORMAT_BC5_SNORM_BLOCK:
    case VK_FORMAT_BC7_UNORM_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK:
    case VK_FORMAT_EAC_R11_UNORM_BLOCK:
    case VK_FORMAT_EAC_R11_SNORM_BLOCK:
    case VK_FORMAT_EAC_R11G11_UNORM_BLOCK:
    case VK_FORMAT_EAC_R11G11_SNORM_BLOCK:
    case VK_FORMAT_ASTC_4x4_UNORM_BLOCK:
    case VK_FORMAT_ASTC_5x4_UNORM_BLOCK:
    case VK_FORMAT_ASTC_5x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_6x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_6x6_UNORM_BLOCK:
    case VK_FORMAT_ASTC_8x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_8x6_UNORM_BLOCK:
    case VK_FORMAT_ASTC_8x8_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x6_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x8_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x10_UNORM_BLOCK:
    case VK_FORMAT_ASTC_12x10_UNORM_BLOCK:
    case VK_FORMAT_ASTC_12x12_UNORM_BLOCK:
    case VK_FORMAT_B5G6R5_UNORM_PACK16:
    case VK_FORMAT_B8G8R8_UNORM:
    case VK_FORMAT_B8G8R8_SNORM:
    case VK_FORMAT_B8G8R8A8_UNORM:
    case VK_FORMAT_B8G8R8A8_SNORM:
    case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
    case VK_FORMAT_A2R10G10B10_SNORM_PACK32:
        is_norm = true;
        break;
    default:
        break;
    }

    return is_norm;
};

// Return true if format is an integer format
bool vk_format_is_int(VkFormat format) { return (vk_format_is_sint(format) || vk_format_is_uint(format)); }

// Return true if format is an unsigned integer format
bool vk_format_is_uint(VkFormat format) {
    bool is_uint = false;

    switch (format) {
    case VK_FORMAT_R8_UINT:
    case VK_FORMAT_R8G8_UINT:
    case VK_FORMAT_R8G8B8_UINT:
    case VK_FORMAT_R8G8B8A8_UINT:
    case VK_FORMAT_A8B8G8R8_UINT_PACK32:
    case VK_FORMAT_A2B10G10R10_UINT_PACK32:
    case VK_FORMAT_R16_UINT:
    case VK_FORMAT_R16G16_UINT:
    case VK_FORMAT_R16G16B16_UINT:
    case VK_FORMAT_R16G16B16A16_UINT:
    case VK_FORMAT_R32_UINT:
    case VK_FORMAT_R32G32_UINT:
    case VK_FORMAT_R32G32B32_UINT:
    case VK_FORMAT_R32G32B32A32_UINT:
    case VK_FORMAT_R64_UINT:
    case VK_FORMAT_R64G64_UINT:
    case VK_FORMAT_R64G64B64_UINT:
    case VK_FORMAT_R64G64B64A64_UINT:
    case VK_FORMAT_B8G8R8_UINT:
    case VK_FORMAT_B8G8R8A8_UINT:
    case VK_FORMAT_A2R10G10B10_UINT_PACK32:
        is_uint = true;
        break;
    default:
        break;
    }

    return is_uint;
}

// Return true if format is a signed integer format
bool vk_format_is_sint(VkFormat format) {
    bool is_sint = false;

    switch (format) {
    case VK_FORMAT_R8_SINT:
    case VK_FORMAT_R8G8_SINT:
    case VK_FORMAT_R8G8B8_SINT:
    case VK_FORMAT_R8G8B8A8_SINT:
    case VK_FORMAT_A8B8G8R8_SINT_PACK32:
    case VK_FORMAT_A2B10G10R10_SINT_PACK32:
    case VK_FORMAT_R16_SINT:
    case VK_FORMAT_R16G16_SINT:
    case VK_FORMAT_R16G16B16_SINT:
    case VK_FORMAT_R16G16B16A16_SINT:
    case VK_FORMAT_R32_SINT:
    case VK_FORMAT_R32G32_SINT:
    case VK_FORMAT_R32G32B32_SINT:
    case VK_FORMAT_R32G32B32A32_SINT:
    case VK_FORMAT_R64_SINT:
    case VK_FORMAT_R64G64_SINT:
    case VK_FORMAT_R64G64B64_SINT:
    case VK_FORMAT_R64G64B64A64_SINT:
    case VK_FORMAT_B8G8R8_SINT:
    case VK_FORMAT_B8G8R8A8_SINT:
    case VK_FORMAT_A2R10G10B10_SINT_PACK32:
        is_sint = true;
        break;
    default:
        break;
    }

    return is_sint;
}

// Return true if format is a floating-point format
bool vk_format_is_float(VkFormat format) {
    bool is_float = false;

    switch (format) {
    case VK_FORMAT_R16_SFLOAT:
    case VK_FORMAT_R16G16_SFLOAT:
    case VK_FORMAT_R16G16B16_SFLOAT:
    case VK_FORMAT_R16G16B16A16_SFLOAT:
    case VK_FORMAT_R32_SFLOAT:
    case VK_FORMAT_R32G32_SFLOAT:
    case VK_FORMAT_R32G32B32_SFLOAT:
    case VK_FORMAT_R32G32B32A32_SFLOAT:
    case VK_FORMAT_R64_SFLOAT:
    case VK_FORMAT_R64G64_SFLOAT:
    case VK_FORMAT_R64G64B64_SFLOAT:
    case VK_FORMAT_R64G64B64A64_SFLOAT:
    case VK_FORMAT_B10G11R11_UFLOAT_PACK32:
    case VK_FORMAT_E5B9G9R9_UFLOAT_PACK32:
    case VK_FORMAT_BC6H_UFLOAT_BLOCK:
    case VK_FORMAT_BC6H_SFLOAT_BLOCK:
        is_float = true;
        break;
    default:
        break;
    }

    return is_float;
}

// Return true if format is in the SRGB colorspace
bool vk_format_is_srgb(VkFormat format) {
    bool is_srgb = false;

    switch (format) {
    case VK_FORMAT_R8_SRGB:
    case VK_FORMAT_R8G8_SRGB:
    case VK_FORMAT_R8G8B8_SRGB:
    case VK_FORMAT_R8G8B8A8_SRGB:
    case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
    case VK_FORMAT_BC1_RGB_SRGB_BLOCK:
    case VK_FORMAT_BC2_SRGB_BLOCK:
    case VK_FORMAT_BC3_SRGB_BLOCK:
    case VK_FORMAT_BC7_SRGB_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK:
    case VK_FORMAT_ASTC_4x4_SRGB_BLOCK:
    case VK_FORMAT_ASTC_5x4_SRGB_BLOCK:
    case VK_FORMAT_ASTC_5x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_6x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_6x6_SRGB_BLOCK:
    case VK_FORMAT_ASTC_8x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_8x6_SRGB_BLOCK:
    case VK_FORMAT_ASTC_8x8_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x6_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x8_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x10_SRGB_BLOCK:
    case VK_FORMAT_ASTC_12x10_SRGB_BLOCK:
    case VK_FORMAT_ASTC_12x12_SRGB_BLOCK:
    case VK_FORMAT_B8G8R8_SRGB:
    case VK_FORMAT_B8G8R8A8_SRGB:
        is_srgb = true;
        break;
    default:
        break;
    }

    return is_srgb;
}

// Return true if format is compressed
bool vk_format_is_compressed(VkFormat format) {
    switch (format) {
    case VK_FORMAT_BC1_RGB_UNORM_BLOCK:
    case VK_FORMAT_BC1_RGB_SRGB_BLOCK:
    case VK_FORMAT_BC2_UNORM_BLOCK:
    case VK_FORMAT_BC2_SRGB_BLOCK:
    case VK_FORMAT_BC3_UNORM_BLOCK:
    case VK_FORMAT_BC3_SRGB_BLOCK:
    case VK_FORMAT_BC4_UNORM_BLOCK:
    case VK_FORMAT_BC4_SNORM_BLOCK:
    case VK_FORMAT_BC5_UNORM_BLOCK:
    case VK_FORMAT_BC5_SNORM_BLOCK:
    case VK_FORMAT_BC6H_UFLOAT_BLOCK:
    case VK_FORMAT_BC6H_SFLOAT_BLOCK:
    case VK_FORMAT_BC7_UNORM_BLOCK:
    case VK_FORMAT_BC7_SRGB_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK:
    case VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK:
    case VK_FORMAT_EAC_R11_UNORM_BLOCK:
    case VK_FORMAT_EAC_R11_SNORM_BLOCK:
    case VK_FORMAT_EAC_R11G11_UNORM_BLOCK:
    case VK_FORMAT_EAC_R11G11_SNORM_BLOCK:
    case VK_FORMAT_ASTC_4x4_UNORM_BLOCK:
    case VK_FORMAT_ASTC_4x4_SRGB_BLOCK:
    case VK_FORMAT_ASTC_5x4_UNORM_BLOCK:
    case VK_FORMAT_ASTC_5x4_SRGB_BLOCK:
    case VK_FORMAT_ASTC_5x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_5x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_6x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_6x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_6x6_UNORM_BLOCK:
    case VK_FORMAT_ASTC_6x6_SRGB_BLOCK:
    case VK_FORMAT_ASTC_8x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_8x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_8x6_UNORM_BLOCK:
    case VK_FORMAT_ASTC_8x6_SRGB_BLOCK:
    case VK_FORMAT_ASTC_8x8_UNORM_BLOCK:
    case VK_FORMAT_ASTC_8x8_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x5_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x5_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x6_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x6_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x8_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x8_SRGB_BLOCK:
    case VK_FORMAT_ASTC_10x10_UNORM_BLOCK:
    case VK_FORMAT_ASTC_10x10_SRGB_BLOCK:
    case VK_FORMAT_ASTC_12x10_UNORM_BLOCK:
    case VK_FORMAT_ASTC_12x10_SRGB_BLOCK:
    case VK_FORMAT_ASTC_12x12_UNORM_BLOCK:
    case VK_FORMAT_ASTC_12x12_SRGB_BLOCK:
        return true;
    default:
        return false;
    }
}

// Return format class of the specified format
VkFormatCompatibilityClass vk_format_get_compatibility_class(VkFormat format) { return vk_format_table[format].format_class; }

// Return size, in bytes, of a pixel of the specified format
size_t vk_format_get_size(VkFormat format) { return vk_format_table[format].size; }

// Return the number of channels for a given format
unsigned int vk_format_get_channel_count(VkFormat format) { return vk_format_table[format].channel_count; }

// Perform a zero-tolerant modulo operation
VkDeviceSize vk_safe_modulo(VkDeviceSize dividend, VkDeviceSize divisor) {
    VkDeviceSize result = 0;
    if (divisor != 0) {
        result = dividend % divisor;
    }
    return result;
}

static const uint8_t UTF8_ONE_BYTE_CODE = 0xC0;
static const uint8_t UTF8_ONE_BYTE_MASK = 0xE0;
static const uint8_t UTF8_TWO_BYTE_CODE = 0xE0;
static const uint8_t UTF8_TWO_BYTE_MASK = 0xF0;
static const uint8_t UTF8_THREE_BYTE_CODE = 0xF0;
static const uint8_t UTF8_THREE_BYTE_MASK = 0xF8;
static const uint8_t UTF8_DATA_BYTE_CODE = 0x80;
static const uint8_t UTF8_DATA_BYTE_MASK = 0xC0;

VkStringErrorFlags vk_string_validate(const int max_length, const char *utf8) {
    VkStringErrorFlags result = VK_STRING_ERROR_NONE;
    int num_char_bytes = 0;
    int i, j;

    for (i = 0; i < max_length; i++) {
        if (utf8[i] == 0) {
            break;
        } else if ((utf8[i] >= 0xa) && (utf8[i] < 0x7f)) {
            num_char_bytes = 0;
        } else if ((utf8[i] & UTF8_ONE_BYTE_MASK) == UTF8_ONE_BYTE_CODE) {
            num_char_bytes = 1;
        } else if ((utf8[i] & UTF8_TWO_BYTE_MASK) == UTF8_TWO_BYTE_CODE) {
            num_char_bytes = 2;
        } else if ((utf8[i] & UTF8_THREE_BYTE_MASK) == UTF8_THREE_BYTE_CODE) {
            num_char_bytes = 3;
        } else {
            result = VK_STRING_ERROR_BAD_DATA;
        }

        // Validate the following num_char_bytes of data
        for (j = 0; (j < num_char_bytes) && (i < max_length); j++) {
            if (++i == max_length) {
                result |= VK_STRING_ERROR_LENGTH;
                break;
            }
            if ((utf8[i] & UTF8_DATA_BYTE_MASK) != UTF8_DATA_BYTE_CODE) {
                result |= VK_STRING_ERROR_BAD_DATA;
            }
        }
    }
    return result;
}

// Debug callbacks get created in three ways:
//   o  Application-defined debug callbacks
//   o  Through settings in a vk_layer_settings.txt file
//   o  By default, if neither an app-defined debug callback nor a vk_layer_settings.txt file is present
//
// At layer initialization time, default logging callbacks are created to output layer error messages.
// If a vk_layer_settings.txt file is present its settings will override any default settings.
//
// If a vk_layer_settings.txt file is present and an application defines a debug callback, both callbacks
// will be active.  If no vk_layer_settings.txt file is present, creating an application-defined debug
// callback will cause the default callbacks to be unregisterd and removed.
void layer_debug_actions(debug_report_data *report_data, std::vector<VkDebugReportCallbackEXT> &logging_callback,
                         const VkAllocationCallbacks *pAllocator, const char *layer_identifier) {

    VkDebugReportCallbackEXT callback = VK_NULL_HANDLE;

    std::string report_flags_key = layer_identifier;
    std::string debug_action_key = layer_identifier;
    std::string log_filename_key = layer_identifier;
    report_flags_key.append(".report_flags");
    debug_action_key.append(".debug_action");
    log_filename_key.append(".log_filename");

    // Initialize layer options
    VkDebugReportFlagsEXT report_flags = GetLayerOptionFlags(report_flags_key, report_flags_option_definitions, 0);
    VkLayerDbgActionFlags debug_action = GetLayerOptionFlags(debug_action_key, debug_actions_option_definitions, 0);
    // Flag as default if these settings are not from a vk_layer_settings.txt file
    bool default_layer_callback = (debug_action & VK_DBG_LAYER_ACTION_DEFAULT) ? true : false;

    if (debug_action & VK_DBG_LAYER_ACTION_LOG_MSG) {
        const char *log_filename = getLayerOption(log_filename_key.c_str());
        FILE *log_output = getLayerLogOutput(log_filename, layer_identifier);
        VkDebugReportCallbackCreateInfoEXT dbgCreateInfo;
        memset(&dbgCreateInfo, 0, sizeof(dbgCreateInfo));
        dbgCreateInfo.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT;
        dbgCreateInfo.flags = report_flags;
        dbgCreateInfo.pfnCallback = log_callback;
        dbgCreateInfo.pUserData = (void *)log_output;
        layer_create_msg_callback(report_data, default_layer_callback, &dbgCreateInfo, pAllocator, &callback);
        logging_callback.push_back(callback);
    }

    callback = VK_NULL_HANDLE;

    if (debug_action & VK_DBG_LAYER_ACTION_DEBUG_OUTPUT) {
        VkDebugReportCallbackCreateInfoEXT dbgCreateInfo;
        memset(&dbgCreateInfo, 0, sizeof(dbgCreateInfo));
        dbgCreateInfo.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT;
        dbgCreateInfo.flags = report_flags;
        dbgCreateInfo.pfnCallback = win32_debug_output_msg;
        dbgCreateInfo.pUserData = NULL;
        layer_create_msg_callback(report_data, default_layer_callback, &dbgCreateInfo, pAllocator, &callback);
        logging_callback.push_back(callback);
    }
}