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      1 ///////////////////////////////////////////////////////////////////////////////
      2 //
      3 // Copyright (c) 2015-2016 The Khronos Group Inc.
      4 // Copyright (c) 2015-2016 Valve Corporation
      5 // Copyright (c) 2015-2016 LunarG, Inc.
      6 // Copyright (c) 2015-2016 Google, Inc.
      7 //
      8 // Licensed under the Apache License, Version 2.0 (the "License");
      9 // you may not use this file except in compliance with the License.
     10 // You may obtain a copy of the License at
     11 //
     12 //     http://www.apache.org/licenses/LICENSE-2.0
     13 //
     14 // Unless required by applicable law or agreed to in writing, software
     15 // distributed under the License is distributed on an "AS IS" BASIS,
     16 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     17 // See the License for the specific language governing permissions and
     18 // limitations under the License.
     19 ///////////////////////////////////////////////////////////////////////////////
     20 
     21 #include "vkjson.h"
     22 
     23 #include <assert.h>
     24 #include <string.h>
     25 #include <stdlib.h>
     26 
     27 #include <cmath>
     28 #include <cinttypes>
     29 #include <cstdio>
     30 #include <limits>
     31 #include <memory>
     32 #include <sstream>
     33 #include <type_traits>
     34 #include <utility>
     35 
     36 #include <json/json.h>
     37 
     38 namespace {
     39 
     40 inline bool IsIntegral(double value) {
     41 #if defined(ANDROID)
     42   // Android NDK doesn't provide std::trunc yet
     43   return trunc(value) == value;
     44 #else
     45   return std::trunc(value) == value;
     46 #endif
     47 }
     48 
     49 template <typename T> struct EnumTraits;
     50 template <> struct EnumTraits<VkPhysicalDeviceType> {
     51   static uint32_t min() { return VK_PHYSICAL_DEVICE_TYPE_BEGIN_RANGE; }
     52   static uint32_t max() { return VK_PHYSICAL_DEVICE_TYPE_END_RANGE; }
     53   static bool exist(uint32_t e) { return e >= min() && e <= max(); }
     54 };
     55 
     56 template <> struct EnumTraits<VkFormat> {
     57   static bool exist(uint32_t e) {
     58     switch (e) {
     59       case VK_FORMAT_UNDEFINED:
     60       case VK_FORMAT_R4G4_UNORM_PACK8:
     61       case VK_FORMAT_R4G4B4A4_UNORM_PACK16:
     62       case VK_FORMAT_B4G4R4A4_UNORM_PACK16:
     63       case VK_FORMAT_R5G6B5_UNORM_PACK16:
     64       case VK_FORMAT_B5G6R5_UNORM_PACK16:
     65       case VK_FORMAT_R5G5B5A1_UNORM_PACK16:
     66       case VK_FORMAT_B5G5R5A1_UNORM_PACK16:
     67       case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
     68       case VK_FORMAT_R8_UNORM:
     69       case VK_FORMAT_R8_SNORM:
     70       case VK_FORMAT_R8_USCALED:
     71       case VK_FORMAT_R8_SSCALED:
     72       case VK_FORMAT_R8_UINT:
     73       case VK_FORMAT_R8_SINT:
     74       case VK_FORMAT_R8_SRGB:
     75       case VK_FORMAT_R8G8_UNORM:
     76       case VK_FORMAT_R8G8_SNORM:
     77       case VK_FORMAT_R8G8_USCALED:
     78       case VK_FORMAT_R8G8_SSCALED:
     79       case VK_FORMAT_R8G8_UINT:
     80       case VK_FORMAT_R8G8_SINT:
     81       case VK_FORMAT_R8G8_SRGB:
     82       case VK_FORMAT_R8G8B8_UNORM:
     83       case VK_FORMAT_R8G8B8_SNORM:
     84       case VK_FORMAT_R8G8B8_USCALED:
     85       case VK_FORMAT_R8G8B8_SSCALED:
     86       case VK_FORMAT_R8G8B8_UINT:
     87       case VK_FORMAT_R8G8B8_SINT:
     88       case VK_FORMAT_R8G8B8_SRGB:
     89       case VK_FORMAT_B8G8R8_UNORM:
     90       case VK_FORMAT_B8G8R8_SNORM:
     91       case VK_FORMAT_B8G8R8_USCALED:
     92       case VK_FORMAT_B8G8R8_SSCALED:
     93       case VK_FORMAT_B8G8R8_UINT:
     94       case VK_FORMAT_B8G8R8_SINT:
     95       case VK_FORMAT_B8G8R8_SRGB:
     96       case VK_FORMAT_R8G8B8A8_UNORM:
     97       case VK_FORMAT_R8G8B8A8_SNORM:
     98       case VK_FORMAT_R8G8B8A8_USCALED:
     99       case VK_FORMAT_R8G8B8A8_SSCALED:
    100       case VK_FORMAT_R8G8B8A8_UINT:
    101       case VK_FORMAT_R8G8B8A8_SINT:
    102       case VK_FORMAT_R8G8B8A8_SRGB:
    103       case VK_FORMAT_B8G8R8A8_UNORM:
    104       case VK_FORMAT_B8G8R8A8_SNORM:
    105       case VK_FORMAT_B8G8R8A8_USCALED:
    106       case VK_FORMAT_B8G8R8A8_SSCALED:
    107       case VK_FORMAT_B8G8R8A8_UINT:
    108       case VK_FORMAT_B8G8R8A8_SINT:
    109       case VK_FORMAT_B8G8R8A8_SRGB:
    110       case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
    111       case VK_FORMAT_A8B8G8R8_SNORM_PACK32:
    112       case VK_FORMAT_A8B8G8R8_USCALED_PACK32:
    113       case VK_FORMAT_A8B8G8R8_SSCALED_PACK32:
    114       case VK_FORMAT_A8B8G8R8_UINT_PACK32:
    115       case VK_FORMAT_A8B8G8R8_SINT_PACK32:
    116       case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
    117       case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
    118       case VK_FORMAT_A2R10G10B10_SNORM_PACK32:
    119       case VK_FORMAT_A2R10G10B10_USCALED_PACK32:
    120       case VK_FORMAT_A2R10G10B10_SSCALED_PACK32:
    121       case VK_FORMAT_A2R10G10B10_UINT_PACK32:
    122       case VK_FORMAT_A2R10G10B10_SINT_PACK32:
    123       case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
    124       case VK_FORMAT_A2B10G10R10_SNORM_PACK32:
    125       case VK_FORMAT_A2B10G10R10_USCALED_PACK32:
    126       case VK_FORMAT_A2B10G10R10_SSCALED_PACK32:
    127       case VK_FORMAT_A2B10G10R10_UINT_PACK32:
    128       case VK_FORMAT_A2B10G10R10_SINT_PACK32:
    129       case VK_FORMAT_R16_UNORM:
    130       case VK_FORMAT_R16_SNORM:
    131       case VK_FORMAT_R16_USCALED:
    132       case VK_FORMAT_R16_SSCALED:
    133       case VK_FORMAT_R16_UINT:
    134       case VK_FORMAT_R16_SINT:
    135       case VK_FORMAT_R16_SFLOAT:
    136       case VK_FORMAT_R16G16_UNORM:
    137       case VK_FORMAT_R16G16_SNORM:
    138       case VK_FORMAT_R16G16_USCALED:
    139       case VK_FORMAT_R16G16_SSCALED:
    140       case VK_FORMAT_R16G16_UINT:
    141       case VK_FORMAT_R16G16_SINT:
    142       case VK_FORMAT_R16G16_SFLOAT:
    143       case VK_FORMAT_R16G16B16_UNORM:
    144       case VK_FORMAT_R16G16B16_SNORM:
    145       case VK_FORMAT_R16G16B16_USCALED:
    146       case VK_FORMAT_R16G16B16_SSCALED:
    147       case VK_FORMAT_R16G16B16_UINT:
    148       case VK_FORMAT_R16G16B16_SINT:
    149       case VK_FORMAT_R16G16B16_SFLOAT:
    150       case VK_FORMAT_R16G16B16A16_UNORM:
    151       case VK_FORMAT_R16G16B16A16_SNORM:
    152       case VK_FORMAT_R16G16B16A16_USCALED:
    153       case VK_FORMAT_R16G16B16A16_SSCALED:
    154       case VK_FORMAT_R16G16B16A16_UINT:
    155       case VK_FORMAT_R16G16B16A16_SINT:
    156       case VK_FORMAT_R16G16B16A16_SFLOAT:
    157       case VK_FORMAT_R32_UINT:
    158       case VK_FORMAT_R32_SINT:
    159       case VK_FORMAT_R32_SFLOAT:
    160       case VK_FORMAT_R32G32_UINT:
    161       case VK_FORMAT_R32G32_SINT:
    162       case VK_FORMAT_R32G32_SFLOAT:
    163       case VK_FORMAT_R32G32B32_UINT:
    164       case VK_FORMAT_R32G32B32_SINT:
    165       case VK_FORMAT_R32G32B32_SFLOAT:
    166       case VK_FORMAT_R32G32B32A32_UINT:
    167       case VK_FORMAT_R32G32B32A32_SINT:
    168       case VK_FORMAT_R32G32B32A32_SFLOAT:
    169       case VK_FORMAT_R64_UINT:
    170       case VK_FORMAT_R64_SINT:
    171       case VK_FORMAT_R64_SFLOAT:
    172       case VK_FORMAT_R64G64_UINT:
    173       case VK_FORMAT_R64G64_SINT:
    174       case VK_FORMAT_R64G64_SFLOAT:
    175       case VK_FORMAT_R64G64B64_UINT:
    176       case VK_FORMAT_R64G64B64_SINT:
    177       case VK_FORMAT_R64G64B64_SFLOAT:
    178       case VK_FORMAT_R64G64B64A64_UINT:
    179       case VK_FORMAT_R64G64B64A64_SINT:
    180       case VK_FORMAT_R64G64B64A64_SFLOAT:
    181       case VK_FORMAT_B10G11R11_UFLOAT_PACK32:
    182       case VK_FORMAT_E5B9G9R9_UFLOAT_PACK32:
    183       case VK_FORMAT_D16_UNORM:
    184       case VK_FORMAT_X8_D24_UNORM_PACK32:
    185       case VK_FORMAT_D32_SFLOAT:
    186       case VK_FORMAT_S8_UINT:
    187       case VK_FORMAT_D16_UNORM_S8_UINT:
    188       case VK_FORMAT_D24_UNORM_S8_UINT:
    189       case VK_FORMAT_D32_SFLOAT_S8_UINT:
    190       case VK_FORMAT_BC1_RGB_UNORM_BLOCK:
    191       case VK_FORMAT_BC1_RGB_SRGB_BLOCK:
    192       case VK_FORMAT_BC1_RGBA_UNORM_BLOCK:
    193       case VK_FORMAT_BC1_RGBA_SRGB_BLOCK:
    194       case VK_FORMAT_BC2_UNORM_BLOCK:
    195       case VK_FORMAT_BC2_SRGB_BLOCK:
    196       case VK_FORMAT_BC3_UNORM_BLOCK:
    197       case VK_FORMAT_BC3_SRGB_BLOCK:
    198       case VK_FORMAT_BC4_UNORM_BLOCK:
    199       case VK_FORMAT_BC4_SNORM_BLOCK:
    200       case VK_FORMAT_BC5_UNORM_BLOCK:
    201       case VK_FORMAT_BC5_SNORM_BLOCK:
    202       case VK_FORMAT_BC6H_UFLOAT_BLOCK:
    203       case VK_FORMAT_BC6H_SFLOAT_BLOCK:
    204       case VK_FORMAT_BC7_UNORM_BLOCK:
    205       case VK_FORMAT_BC7_SRGB_BLOCK:
    206       case VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK:
    207       case VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK:
    208       case VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK:
    209       case VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK:
    210       case VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK:
    211       case VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK:
    212       case VK_FORMAT_EAC_R11_UNORM_BLOCK:
    213       case VK_FORMAT_EAC_R11_SNORM_BLOCK:
    214       case VK_FORMAT_EAC_R11G11_UNORM_BLOCK:
    215       case VK_FORMAT_EAC_R11G11_SNORM_BLOCK:
    216       case VK_FORMAT_ASTC_4x4_UNORM_BLOCK:
    217       case VK_FORMAT_ASTC_4x4_SRGB_BLOCK:
    218       case VK_FORMAT_ASTC_5x4_UNORM_BLOCK:
    219       case VK_FORMAT_ASTC_5x4_SRGB_BLOCK:
    220       case VK_FORMAT_ASTC_5x5_UNORM_BLOCK:
    221       case VK_FORMAT_ASTC_5x5_SRGB_BLOCK:
    222       case VK_FORMAT_ASTC_6x5_UNORM_BLOCK:
    223       case VK_FORMAT_ASTC_6x5_SRGB_BLOCK:
    224       case VK_FORMAT_ASTC_6x6_UNORM_BLOCK:
    225       case VK_FORMAT_ASTC_6x6_SRGB_BLOCK:
    226       case VK_FORMAT_ASTC_8x5_UNORM_BLOCK:
    227       case VK_FORMAT_ASTC_8x5_SRGB_BLOCK:
    228       case VK_FORMAT_ASTC_8x6_UNORM_BLOCK:
    229       case VK_FORMAT_ASTC_8x6_SRGB_BLOCK:
    230       case VK_FORMAT_ASTC_8x8_UNORM_BLOCK:
    231       case VK_FORMAT_ASTC_8x8_SRGB_BLOCK:
    232       case VK_FORMAT_ASTC_10x5_UNORM_BLOCK:
    233       case VK_FORMAT_ASTC_10x5_SRGB_BLOCK:
    234       case VK_FORMAT_ASTC_10x6_UNORM_BLOCK:
    235       case VK_FORMAT_ASTC_10x6_SRGB_BLOCK:
    236       case VK_FORMAT_ASTC_10x8_UNORM_BLOCK:
    237       case VK_FORMAT_ASTC_10x8_SRGB_BLOCK:
    238       case VK_FORMAT_ASTC_10x10_UNORM_BLOCK:
    239       case VK_FORMAT_ASTC_10x10_SRGB_BLOCK:
    240       case VK_FORMAT_ASTC_12x10_UNORM_BLOCK:
    241       case VK_FORMAT_ASTC_12x10_SRGB_BLOCK:
    242       case VK_FORMAT_ASTC_12x12_UNORM_BLOCK:
    243       case VK_FORMAT_ASTC_12x12_SRGB_BLOCK:
    244       case VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG:
    245       case VK_FORMAT_PVRTC1_4BPP_UNORM_BLOCK_IMG:
    246       case VK_FORMAT_PVRTC2_2BPP_UNORM_BLOCK_IMG:
    247       case VK_FORMAT_PVRTC2_4BPP_UNORM_BLOCK_IMG:
    248       case VK_FORMAT_PVRTC1_2BPP_SRGB_BLOCK_IMG:
    249       case VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG:
    250       case VK_FORMAT_PVRTC2_2BPP_SRGB_BLOCK_IMG:
    251       case VK_FORMAT_PVRTC2_4BPP_SRGB_BLOCK_IMG:
    252       case VK_FORMAT_G8B8G8R8_422_UNORM_KHR:
    253       case VK_FORMAT_B8G8R8G8_422_UNORM_KHR:
    254       case VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM_KHR:
    255       case VK_FORMAT_G8_B8R8_2PLANE_420_UNORM_KHR:
    256       case VK_FORMAT_G8_B8_R8_3PLANE_422_UNORM_KHR:
    257       case VK_FORMAT_G8_B8R8_2PLANE_422_UNORM_KHR:
    258       case VK_FORMAT_G8_B8_R8_3PLANE_444_UNORM_KHR:
    259       case VK_FORMAT_R10X6_UNORM_PACK16_KHR:
    260       case VK_FORMAT_R10X6G10X6_UNORM_2PACK16_KHR:
    261       case VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16_KHR:
    262       case VK_FORMAT_G10X6B10X6G10X6R10X6_422_UNORM_4PACK16_KHR:
    263       case VK_FORMAT_B10X6G10X6R10X6G10X6_422_UNORM_4PACK16_KHR:
    264       case VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16_KHR:
    265       case VK_FORMAT_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16_KHR:
    266       case VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_422_UNORM_3PACK16_KHR:
    267       case VK_FORMAT_G10X6_B10X6R10X6_2PLANE_422_UNORM_3PACK16_KHR:
    268       case VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_444_UNORM_3PACK16_KHR:
    269       case VK_FORMAT_R12X4_UNORM_PACK16_KHR:
    270       case VK_FORMAT_R12X4G12X4_UNORM_2PACK16_KHR:
    271       case VK_FORMAT_R12X4G12X4B12X4A12X4_UNORM_4PACK16_KHR:
    272       case VK_FORMAT_G12X4B12X4G12X4R12X4_422_UNORM_4PACK16_KHR:
    273       case VK_FORMAT_B12X4G12X4R12X4G12X4_422_UNORM_4PACK16_KHR:
    274       case VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16_KHR:
    275       case VK_FORMAT_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16_KHR:
    276       case VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_422_UNORM_3PACK16_KHR:
    277       case VK_FORMAT_G12X4_B12X4R12X4_2PLANE_422_UNORM_3PACK16_KHR:
    278       case VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_444_UNORM_3PACK16_KHR:
    279       case VK_FORMAT_G16B16G16R16_422_UNORM_KHR:
    280       case VK_FORMAT_B16G16R16G16_422_UNORM_KHR:
    281       case VK_FORMAT_G16_B16_R16_3PLANE_420_UNORM_KHR:
    282       case VK_FORMAT_G16_B16R16_2PLANE_420_UNORM_KHR:
    283       case VK_FORMAT_G16_B16_R16_3PLANE_422_UNORM_KHR:
    284       case VK_FORMAT_G16_B16R16_2PLANE_422_UNORM_KHR:
    285       case VK_FORMAT_G16_B16_R16_3PLANE_444_UNORM_KHR:
    286         return true;
    287     }
    288     return false;
    289   }
    290 };
    291 
    292 template <>
    293 struct EnumTraits<VkPointClippingBehavior> {
    294   static uint32_t min() { return VK_POINT_CLIPPING_BEHAVIOR_BEGIN_RANGE; }
    295   static uint32_t max() { return VK_POINT_CLIPPING_BEHAVIOR_END_RANGE; }
    296   static bool exist(uint32_t e) { return e >= min() && e <= max(); }
    297 };
    298 
    299 template <>
    300 struct EnumTraits<VkExternalFenceHandleTypeFlagBits> {
    301   static bool exist(uint32_t e) {
    302     switch (e) {
    303       case VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_FD_BIT:
    304       case VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_WIN32_BIT:
    305       case VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_WIN32_KMT_BIT:
    306       case VK_EXTERNAL_FENCE_HANDLE_TYPE_SYNC_FD_BIT:
    307         return true;
    308     }
    309     return false;
    310   }
    311 };
    312 
    313 template <>
    314 struct EnumTraits<VkExternalSemaphoreHandleTypeFlagBits> {
    315   static bool exist(uint32_t e) {
    316     switch (e) {
    317       case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT:
    318       case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_BIT:
    319       case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_KMT_BIT:
    320       case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_D3D12_FENCE_BIT:
    321       case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT:
    322         return true;
    323     }
    324     return false;
    325   }
    326 };
    327 
    328 // VkSparseImageFormatProperties
    329 
    330 template <typename Visitor>
    331 inline bool Iterate(Visitor* visitor, VkExtent3D* extents) {
    332   return
    333     visitor->Visit("width", &extents->width) &&
    334     visitor->Visit("height", &extents->height) &&
    335     visitor->Visit("depth", &extents->depth);
    336 }
    337 
    338 template <typename Visitor>
    339 inline bool Iterate(Visitor* visitor, VkImageFormatProperties* properties) {
    340   return
    341     visitor->Visit("maxExtent", &properties->maxExtent) &&
    342     visitor->Visit("maxMipLevels", &properties->maxMipLevels) &&
    343     visitor->Visit("maxArrayLayers", &properties->maxArrayLayers) &&
    344     visitor->Visit("sampleCounts", &properties->sampleCounts) &&
    345     visitor->Visit("maxResourceSize", &properties->maxResourceSize);
    346 }
    347 
    348 template <typename Visitor>
    349 inline bool Iterate(Visitor* visitor, VkPhysicalDeviceLimits* limits) {
    350   return
    351     visitor->Visit("maxImageDimension1D", &limits->maxImageDimension1D) &&
    352     visitor->Visit("maxImageDimension2D", &limits->maxImageDimension2D) &&
    353     visitor->Visit("maxImageDimension3D", &limits->maxImageDimension3D) &&
    354     visitor->Visit("maxImageDimensionCube", &limits->maxImageDimensionCube) &&
    355     visitor->Visit("maxImageArrayLayers", &limits->maxImageArrayLayers) &&
    356     visitor->Visit("maxTexelBufferElements", &limits->maxTexelBufferElements) &&
    357     visitor->Visit("maxUniformBufferRange", &limits->maxUniformBufferRange) &&
    358     visitor->Visit("maxStorageBufferRange", &limits->maxStorageBufferRange) &&
    359     visitor->Visit("maxPushConstantsSize", &limits->maxPushConstantsSize) &&
    360     visitor->Visit("maxMemoryAllocationCount", &limits->maxMemoryAllocationCount) &&
    361     visitor->Visit("maxSamplerAllocationCount", &limits->maxSamplerAllocationCount) &&
    362     visitor->Visit("bufferImageGranularity", &limits->bufferImageGranularity) &&
    363     visitor->Visit("sparseAddressSpaceSize", &limits->sparseAddressSpaceSize) &&
    364     visitor->Visit("maxBoundDescriptorSets", &limits->maxBoundDescriptorSets) &&
    365     visitor->Visit("maxPerStageDescriptorSamplers", &limits->maxPerStageDescriptorSamplers) &&
    366     visitor->Visit("maxPerStageDescriptorUniformBuffers", &limits->maxPerStageDescriptorUniformBuffers) &&
    367     visitor->Visit("maxPerStageDescriptorStorageBuffers", &limits->maxPerStageDescriptorStorageBuffers) &&
    368     visitor->Visit("maxPerStageDescriptorSampledImages", &limits->maxPerStageDescriptorSampledImages) &&
    369     visitor->Visit("maxPerStageDescriptorStorageImages", &limits->maxPerStageDescriptorStorageImages) &&
    370     visitor->Visit("maxPerStageDescriptorInputAttachments", &limits->maxPerStageDescriptorInputAttachments) &&
    371     visitor->Visit("maxPerStageResources", &limits->maxPerStageResources) &&
    372     visitor->Visit("maxDescriptorSetSamplers", &limits->maxDescriptorSetSamplers) &&
    373     visitor->Visit("maxDescriptorSetUniformBuffers", &limits->maxDescriptorSetUniformBuffers) &&
    374     visitor->Visit("maxDescriptorSetUniformBuffersDynamic", &limits->maxDescriptorSetUniformBuffersDynamic) &&
    375     visitor->Visit("maxDescriptorSetStorageBuffers", &limits->maxDescriptorSetStorageBuffers) &&
    376     visitor->Visit("maxDescriptorSetStorageBuffersDynamic", &limits->maxDescriptorSetStorageBuffersDynamic) &&
    377     visitor->Visit("maxDescriptorSetSampledImages", &limits->maxDescriptorSetSampledImages) &&
    378     visitor->Visit("maxDescriptorSetStorageImages", &limits->maxDescriptorSetStorageImages) &&
    379     visitor->Visit("maxDescriptorSetInputAttachments", &limits->maxDescriptorSetInputAttachments) &&
    380     visitor->Visit("maxVertexInputAttributes", &limits->maxVertexInputAttributes) &&
    381     visitor->Visit("maxVertexInputBindings", &limits->maxVertexInputBindings) &&
    382     visitor->Visit("maxVertexInputAttributeOffset", &limits->maxVertexInputAttributeOffset) &&
    383     visitor->Visit("maxVertexInputBindingStride", &limits->maxVertexInputBindingStride) &&
    384     visitor->Visit("maxVertexOutputComponents", &limits->maxVertexOutputComponents) &&
    385     visitor->Visit("maxTessellationGenerationLevel", &limits->maxTessellationGenerationLevel) &&
    386     visitor->Visit("maxTessellationPatchSize", &limits->maxTessellationPatchSize) &&
    387     visitor->Visit("maxTessellationControlPerVertexInputComponents", &limits->maxTessellationControlPerVertexInputComponents) &&
    388     visitor->Visit("maxTessellationControlPerVertexOutputComponents", &limits->maxTessellationControlPerVertexOutputComponents) &&
    389     visitor->Visit("maxTessellationControlPerPatchOutputComponents", &limits->maxTessellationControlPerPatchOutputComponents) &&
    390     visitor->Visit("maxTessellationControlTotalOutputComponents", &limits->maxTessellationControlTotalOutputComponents) &&
    391     visitor->Visit("maxTessellationEvaluationInputComponents", &limits->maxTessellationEvaluationInputComponents) &&
    392     visitor->Visit("maxTessellationEvaluationOutputComponents", &limits->maxTessellationEvaluationOutputComponents) &&
    393     visitor->Visit("maxGeometryShaderInvocations", &limits->maxGeometryShaderInvocations) &&
    394     visitor->Visit("maxGeometryInputComponents", &limits->maxGeometryInputComponents) &&
    395     visitor->Visit("maxGeometryOutputComponents", &limits->maxGeometryOutputComponents) &&
    396     visitor->Visit("maxGeometryOutputVertices", &limits->maxGeometryOutputVertices) &&
    397     visitor->Visit("maxGeometryTotalOutputComponents", &limits->maxGeometryTotalOutputComponents) &&
    398     visitor->Visit("maxFragmentInputComponents", &limits->maxFragmentInputComponents) &&
    399     visitor->Visit("maxFragmentOutputAttachments", &limits->maxFragmentOutputAttachments) &&
    400     visitor->Visit("maxFragmentDualSrcAttachments", &limits->maxFragmentDualSrcAttachments) &&
    401     visitor->Visit("maxFragmentCombinedOutputResources", &limits->maxFragmentCombinedOutputResources) &&
    402     visitor->Visit("maxComputeSharedMemorySize", &limits->maxComputeSharedMemorySize) &&
    403     visitor->Visit("maxComputeWorkGroupCount", &limits->maxComputeWorkGroupCount) &&
    404     visitor->Visit("maxComputeWorkGroupInvocations", &limits->maxComputeWorkGroupInvocations) &&
    405     visitor->Visit("maxComputeWorkGroupSize", &limits->maxComputeWorkGroupSize) &&
    406     visitor->Visit("subPixelPrecisionBits", &limits->subPixelPrecisionBits) &&
    407     visitor->Visit("subTexelPrecisionBits", &limits->subTexelPrecisionBits) &&
    408     visitor->Visit("mipmapPrecisionBits", &limits->mipmapPrecisionBits) &&
    409     visitor->Visit("maxDrawIndexedIndexValue", &limits->maxDrawIndexedIndexValue) &&
    410     visitor->Visit("maxDrawIndirectCount", &limits->maxDrawIndirectCount) &&
    411     visitor->Visit("maxSamplerLodBias", &limits->maxSamplerLodBias) &&
    412     visitor->Visit("maxSamplerAnisotropy", &limits->maxSamplerAnisotropy) &&
    413     visitor->Visit("maxViewports", &limits->maxViewports) &&
    414     visitor->Visit("maxViewportDimensions", &limits->maxViewportDimensions) &&
    415     visitor->Visit("viewportBoundsRange", &limits->viewportBoundsRange) &&
    416     visitor->Visit("viewportSubPixelBits", &limits->viewportSubPixelBits) &&
    417     visitor->Visit("minMemoryMapAlignment", &limits->minMemoryMapAlignment) &&
    418     visitor->Visit("minTexelBufferOffsetAlignment", &limits->minTexelBufferOffsetAlignment) &&
    419     visitor->Visit("minUniformBufferOffsetAlignment", &limits->minUniformBufferOffsetAlignment) &&
    420     visitor->Visit("minStorageBufferOffsetAlignment", &limits->minStorageBufferOffsetAlignment) &&
    421     visitor->Visit("minTexelOffset", &limits->minTexelOffset) &&
    422     visitor->Visit("maxTexelOffset", &limits->maxTexelOffset) &&
    423     visitor->Visit("minTexelGatherOffset", &limits->minTexelGatherOffset) &&
    424     visitor->Visit("maxTexelGatherOffset", &limits->maxTexelGatherOffset) &&
    425     visitor->Visit("minInterpolationOffset", &limits->minInterpolationOffset) &&
    426     visitor->Visit("maxInterpolationOffset", &limits->maxInterpolationOffset) &&
    427     visitor->Visit("subPixelInterpolationOffsetBits", &limits->subPixelInterpolationOffsetBits) &&
    428     visitor->Visit("maxFramebufferWidth", &limits->maxFramebufferWidth) &&
    429     visitor->Visit("maxFramebufferHeight", &limits->maxFramebufferHeight) &&
    430     visitor->Visit("maxFramebufferLayers", &limits->maxFramebufferLayers) &&
    431     visitor->Visit("framebufferColorSampleCounts", &limits->framebufferColorSampleCounts) &&
    432     visitor->Visit("framebufferDepthSampleCounts", &limits->framebufferDepthSampleCounts) &&
    433     visitor->Visit("framebufferStencilSampleCounts", &limits->framebufferStencilSampleCounts) &&
    434     visitor->Visit("framebufferNoAttachmentsSampleCounts", &limits->framebufferNoAttachmentsSampleCounts) &&
    435     visitor->Visit("maxColorAttachments", &limits->maxColorAttachments) &&
    436     visitor->Visit("sampledImageColorSampleCounts", &limits->sampledImageColorSampleCounts) &&
    437     visitor->Visit("sampledImageIntegerSampleCounts", &limits->sampledImageIntegerSampleCounts) &&
    438     visitor->Visit("sampledImageDepthSampleCounts", &limits->sampledImageDepthSampleCounts) &&
    439     visitor->Visit("sampledImageStencilSampleCounts", &limits->sampledImageStencilSampleCounts) &&
    440     visitor->Visit("storageImageSampleCounts", &limits->storageImageSampleCounts) &&
    441     visitor->Visit("maxSampleMaskWords", &limits->maxSampleMaskWords) &&
    442     visitor->Visit("timestampComputeAndGraphics", &limits->timestampComputeAndGraphics) &&
    443     visitor->Visit("timestampPeriod", &limits->timestampPeriod) &&
    444     visitor->Visit("maxClipDistances", &limits->maxClipDistances) &&
    445     visitor->Visit("maxCullDistances", &limits->maxCullDistances) &&
    446     visitor->Visit("maxCombinedClipAndCullDistances", &limits->maxCombinedClipAndCullDistances) &&
    447     visitor->Visit("discreteQueuePriorities", &limits->discreteQueuePriorities) &&
    448     visitor->Visit("pointSizeRange", &limits->pointSizeRange) &&
    449     visitor->Visit("lineWidthRange", &limits->lineWidthRange) &&
    450     visitor->Visit("pointSizeGranularity", &limits->pointSizeGranularity) &&
    451     visitor->Visit("lineWidthGranularity", &limits->lineWidthGranularity) &&
    452     visitor->Visit("strictLines", &limits->strictLines) &&
    453     visitor->Visit("standardSampleLocations", &limits->standardSampleLocations) &&
    454     visitor->Visit("optimalBufferCopyOffsetAlignment", &limits->optimalBufferCopyOffsetAlignment) &&
    455     visitor->Visit("optimalBufferCopyRowPitchAlignment", &limits->optimalBufferCopyRowPitchAlignment) &&
    456     visitor->Visit("nonCoherentAtomSize", &limits->nonCoherentAtomSize);
    457 }
    458 
    459 template <typename Visitor>
    460 inline bool Iterate(Visitor* visitor,
    461                     VkPhysicalDeviceSparseProperties* properties) {
    462   return
    463     visitor->Visit("residencyStandard2DBlockShape", &properties->residencyStandard2DBlockShape) &&
    464     visitor->Visit("residencyStandard2DMultisampleBlockShape", &properties->residencyStandard2DMultisampleBlockShape) &&
    465     visitor->Visit("residencyStandard3DBlockShape", &properties->residencyStandard3DBlockShape) &&
    466     visitor->Visit("residencyAlignedMipSize", &properties->residencyAlignedMipSize) &&
    467     visitor->Visit("residencyNonResidentStrict", &properties->residencyNonResidentStrict);
    468 }
    469 
    470 template <typename Visitor>
    471 inline bool Iterate(Visitor* visitor,
    472                     VkPhysicalDeviceProperties* properties) {
    473   return
    474     visitor->Visit("apiVersion", &properties->apiVersion) &&
    475     visitor->Visit("driverVersion", &properties->driverVersion) &&
    476     visitor->Visit("vendorID", &properties->vendorID) &&
    477     visitor->Visit("deviceID", &properties->deviceID) &&
    478     visitor->Visit("deviceType", &properties->deviceType) &&
    479     visitor->Visit("deviceName", &properties->deviceName) &&
    480     visitor->Visit("pipelineCacheUUID", &properties->pipelineCacheUUID) &&
    481     visitor->Visit("limits", &properties->limits) &&
    482     visitor->Visit("sparseProperties", &properties->sparseProperties);
    483 }
    484 
    485 template <typename Visitor>
    486 inline bool Iterate(Visitor* visitor, VkPhysicalDeviceFeatures* features) {
    487   return
    488     visitor->Visit("robustBufferAccess", &features->robustBufferAccess) &&
    489     visitor->Visit("fullDrawIndexUint32", &features->fullDrawIndexUint32) &&
    490     visitor->Visit("imageCubeArray", &features->imageCubeArray) &&
    491     visitor->Visit("independentBlend", &features->independentBlend) &&
    492     visitor->Visit("geometryShader", &features->geometryShader) &&
    493     visitor->Visit("tessellationShader", &features->tessellationShader) &&
    494     visitor->Visit("sampleRateShading", &features->sampleRateShading) &&
    495     visitor->Visit("dualSrcBlend", &features->dualSrcBlend) &&
    496     visitor->Visit("logicOp", &features->logicOp) &&
    497     visitor->Visit("multiDrawIndirect", &features->multiDrawIndirect) &&
    498     visitor->Visit("drawIndirectFirstInstance", &features->drawIndirectFirstInstance) &&
    499     visitor->Visit("depthClamp", &features->depthClamp) &&
    500     visitor->Visit("depthBiasClamp", &features->depthBiasClamp) &&
    501     visitor->Visit("fillModeNonSolid", &features->fillModeNonSolid) &&
    502     visitor->Visit("depthBounds", &features->depthBounds) &&
    503     visitor->Visit("wideLines", &features->wideLines) &&
    504     visitor->Visit("largePoints", &features->largePoints) &&
    505     visitor->Visit("alphaToOne", &features->alphaToOne) &&
    506     visitor->Visit("multiViewport", &features->multiViewport) &&
    507     visitor->Visit("samplerAnisotropy", &features->samplerAnisotropy) &&
    508     visitor->Visit("textureCompressionETC2", &features->textureCompressionETC2) &&
    509     visitor->Visit("textureCompressionASTC_LDR", &features->textureCompressionASTC_LDR) &&
    510     visitor->Visit("textureCompressionBC", &features->textureCompressionBC) &&
    511     visitor->Visit("occlusionQueryPrecise", &features->occlusionQueryPrecise) &&
    512     visitor->Visit("pipelineStatisticsQuery", &features->pipelineStatisticsQuery) &&
    513     visitor->Visit("vertexPipelineStoresAndAtomics", &features->vertexPipelineStoresAndAtomics) &&
    514     visitor->Visit("fragmentStoresAndAtomics", &features->fragmentStoresAndAtomics) &&
    515     visitor->Visit("shaderTessellationAndGeometryPointSize", &features->shaderTessellationAndGeometryPointSize) &&
    516     visitor->Visit("shaderImageGatherExtended", &features->shaderImageGatherExtended) &&
    517     visitor->Visit("shaderStorageImageExtendedFormats", &features->shaderStorageImageExtendedFormats) &&
    518     visitor->Visit("shaderStorageImageMultisample", &features->shaderStorageImageMultisample) &&
    519     visitor->Visit("shaderStorageImageReadWithoutFormat", &features->shaderStorageImageReadWithoutFormat) &&
    520     visitor->Visit("shaderStorageImageWriteWithoutFormat", &features->shaderStorageImageWriteWithoutFormat) &&
    521     visitor->Visit("shaderUniformBufferArrayDynamicIndexing", &features->shaderUniformBufferArrayDynamicIndexing) &&
    522     visitor->Visit("shaderSampledImageArrayDynamicIndexing", &features->shaderSampledImageArrayDynamicIndexing) &&
    523     visitor->Visit("shaderStorageBufferArrayDynamicIndexing", &features->shaderStorageBufferArrayDynamicIndexing) &&
    524     visitor->Visit("shaderStorageImageArrayDynamicIndexing", &features->shaderStorageImageArrayDynamicIndexing) &&
    525     visitor->Visit("shaderClipDistance", &features->shaderClipDistance) &&
    526     visitor->Visit("shaderCullDistance", &features->shaderCullDistance) &&
    527     visitor->Visit("shaderFloat64", &features->shaderFloat64) &&
    528     visitor->Visit("shaderInt64", &features->shaderInt64) &&
    529     visitor->Visit("shaderInt16", &features->shaderInt16) &&
    530     visitor->Visit("shaderResourceResidency", &features->shaderResourceResidency) &&
    531     visitor->Visit("shaderResourceMinLod", &features->shaderResourceMinLod) &&
    532     visitor->Visit("sparseBinding", &features->sparseBinding) &&
    533     visitor->Visit("sparseResidencyBuffer", &features->sparseResidencyBuffer) &&
    534     visitor->Visit("sparseResidencyImage2D", &features->sparseResidencyImage2D) &&
    535     visitor->Visit("sparseResidencyImage3D", &features->sparseResidencyImage3D) &&
    536     visitor->Visit("sparseResidency2Samples", &features->sparseResidency2Samples) &&
    537     visitor->Visit("sparseResidency4Samples", &features->sparseResidency4Samples) &&
    538     visitor->Visit("sparseResidency8Samples", &features->sparseResidency8Samples) &&
    539     visitor->Visit("sparseResidency16Samples", &features->sparseResidency16Samples) &&
    540     visitor->Visit("sparseResidencyAliased", &features->sparseResidencyAliased) &&
    541     visitor->Visit("variableMultisampleRate", &features->variableMultisampleRate) &&
    542     visitor->Visit("inheritedQueries", &features->inheritedQueries);
    543 }
    544 
    545 template <typename Visitor>
    546 inline bool Iterate(Visitor* visitor,
    547                     VkJsonExtVariablePointerFeatures* features) {
    548   return visitor->Visit("variablePointerFeaturesKHR",
    549                         &features->variable_pointer_features_khr);
    550 }
    551 
    552 template <typename Visitor>
    553 inline bool Iterate(Visitor* visitor, VkMemoryType* type) {
    554   return
    555     visitor->Visit("propertyFlags", &type->propertyFlags) &&
    556     visitor->Visit("heapIndex", &type->heapIndex);
    557 }
    558 
    559 template <typename Visitor>
    560 inline bool Iterate(Visitor* visitor, VkMemoryHeap* heap) {
    561   return
    562     visitor->Visit("size", &heap->size) &&
    563     visitor->Visit("flags", &heap->flags);
    564 }
    565 
    566 template <typename Visitor>
    567 inline bool Iterate(Visitor* visitor, VkPhysicalDeviceMemoryProperties* properties) {
    568   return
    569     visitor->Visit("memoryTypeCount", &properties->memoryTypeCount) &&
    570     visitor->VisitArray("memoryTypes", properties->memoryTypeCount, &properties->memoryTypes) &&
    571     visitor->Visit("memoryHeapCount", &properties->memoryHeapCount) &&
    572     visitor->VisitArray("memoryHeaps", properties->memoryHeapCount, &properties->memoryHeaps);
    573 }
    574 
    575 template <typename Visitor>
    576 inline bool Iterate(Visitor* visitor,
    577                     VkPhysicalDeviceSubgroupProperties* properties) {
    578   return visitor->Visit("subgroupSize", &properties->subgroupSize) &&
    579          visitor->Visit("supportedStages", &properties->supportedStages) &&
    580          visitor->Visit("supportedOperations",
    581                         &properties->supportedOperations) &&
    582          visitor->Visit("quadOperationsInAllStages",
    583                         &properties->quadOperationsInAllStages);
    584 }
    585 
    586 template <typename Visitor>
    587 inline bool Iterate(Visitor* visitor,
    588                     VkPhysicalDevicePointClippingProperties* properties) {
    589   return visitor->Visit("pointClippingBehavior",
    590                         &properties->pointClippingBehavior);
    591 }
    592 
    593 template <typename Visitor>
    594 inline bool Iterate(Visitor* visitor,
    595                     VkPhysicalDeviceMultiviewProperties* properties) {
    596   return visitor->Visit("maxMultiviewViewCount",
    597                         &properties->maxMultiviewViewCount) &&
    598          visitor->Visit("maxMultiviewInstanceIndex",
    599                         &properties->maxMultiviewInstanceIndex);
    600 }
    601 
    602 template <typename Visitor>
    603 inline bool Iterate(Visitor* visitor,
    604                     VkPhysicalDeviceIDProperties* properties) {
    605   return visitor->Visit("deviceUUID", &properties->deviceUUID) &&
    606          visitor->Visit("driverUUID", &properties->driverUUID) &&
    607          visitor->Visit("deviceLUID", &properties->deviceLUID) &&
    608          visitor->Visit("deviceNodeMask", &properties->deviceNodeMask) &&
    609          visitor->Visit("deviceLUIDValid", &properties->deviceLUIDValid);
    610 }
    611 
    612 template <typename Visitor>
    613 inline bool Iterate(Visitor* visitor,
    614                     VkPhysicalDeviceMaintenance3Properties* properties) {
    615   return visitor->Visit("maxPerSetDescriptors",
    616                         &properties->maxPerSetDescriptors) &&
    617          visitor->Visit("maxMemoryAllocationSize",
    618                         &properties->maxMemoryAllocationSize);
    619 }
    620 
    621 template <typename Visitor>
    622 inline bool Iterate(Visitor* visitor,
    623                     VkPhysicalDevice16BitStorageFeatures* features) {
    624   return visitor->Visit("storageBuffer16BitAccess",
    625                         &features->storageBuffer16BitAccess) &&
    626          visitor->Visit("uniformAndStorageBuffer16BitAccess",
    627                         &features->uniformAndStorageBuffer16BitAccess) &&
    628          visitor->Visit("storagePushConstant16",
    629                         &features->storagePushConstant16) &&
    630          visitor->Visit("storageInputOutput16",
    631                         &features->storageInputOutput16);
    632 }
    633 
    634 template <typename Visitor>
    635 inline bool Iterate(Visitor* visitor,
    636                     VkPhysicalDeviceMultiviewFeatures* features) {
    637   return visitor->Visit("multiview", &features->multiview) &&
    638          visitor->Visit("multiviewGeometryShader",
    639                         &features->multiviewGeometryShader) &&
    640          visitor->Visit("multiviewTessellationShader",
    641                         &features->multiviewTessellationShader);
    642 }
    643 
    644 template <typename Visitor>
    645 inline bool Iterate(Visitor* visitor,
    646                     VkPhysicalDeviceVariablePointerFeatures* features) {
    647   return visitor->Visit("variablePointersStorageBuffer",
    648                         &features->variablePointersStorageBuffer) &&
    649          visitor->Visit("variablePointers", &features->variablePointers);
    650 }
    651 
    652 template <typename Visitor>
    653 inline bool Iterate(Visitor* visitor,
    654                     VkPhysicalDeviceProtectedMemoryFeatures* features) {
    655   return visitor->Visit("protectedMemory", &features->protectedMemory);
    656 }
    657 
    658 template <typename Visitor>
    659 inline bool Iterate(Visitor* visitor,
    660                     VkPhysicalDeviceSamplerYcbcrConversionFeatures* features) {
    661   return visitor->Visit("samplerYcbcrConversion",
    662                         &features->samplerYcbcrConversion);
    663 }
    664 
    665 template <typename Visitor>
    666 inline bool Iterate(Visitor* visitor,
    667                     VkPhysicalDeviceShaderDrawParameterFeatures* features) {
    668   return visitor->Visit("shaderDrawParameters",
    669                         &features->shaderDrawParameters);
    670 }
    671 
    672 template <typename Visitor>
    673 inline bool Iterate(Visitor* visitor, VkExternalFenceProperties* properties) {
    674   return visitor->Visit("exportFromImportedHandleTypes",
    675                         &properties->exportFromImportedHandleTypes) &&
    676          visitor->Visit("compatibleHandleTypes",
    677                         &properties->compatibleHandleTypes) &&
    678          visitor->Visit("externalFenceFeatures",
    679                         &properties->externalFenceFeatures);
    680 }
    681 
    682 template <typename Visitor>
    683 inline bool Iterate(Visitor* visitor,
    684                     VkExternalSemaphoreProperties* properties) {
    685   return visitor->Visit("exportFromImportedHandleTypes",
    686                         &properties->exportFromImportedHandleTypes) &&
    687          visitor->Visit("compatibleHandleTypes",
    688                         &properties->compatibleHandleTypes) &&
    689          visitor->Visit("externalSemaphoreFeatures",
    690                         &properties->externalSemaphoreFeatures);
    691 }
    692 
    693 template <typename Visitor>
    694 inline bool Iterate(Visitor* visitor, VkQueueFamilyProperties* properties) {
    695   return
    696     visitor->Visit("queueFlags", &properties->queueFlags) &&
    697     visitor->Visit("queueCount", &properties->queueCount) &&
    698     visitor->Visit("timestampValidBits", &properties->timestampValidBits) &&
    699     visitor->Visit("minImageTransferGranularity", &properties->minImageTransferGranularity);
    700 }
    701 
    702 template <typename Visitor>
    703 inline bool Iterate(Visitor* visitor, VkExtensionProperties* properties) {
    704   return
    705     visitor->Visit("extensionName", &properties->extensionName) &&
    706     visitor->Visit("specVersion", &properties->specVersion);
    707 }
    708 
    709 template <typename Visitor>
    710 inline bool Iterate(Visitor* visitor, VkLayerProperties* properties) {
    711   return
    712     visitor->Visit("layerName", &properties->layerName) &&
    713     visitor->Visit("specVersion", &properties->specVersion) &&
    714     visitor->Visit("implementationVersion", &properties->implementationVersion) &&
    715     visitor->Visit("description", &properties->description);
    716 }
    717 
    718 template <typename Visitor>
    719 inline bool Iterate(Visitor* visitor, VkFormatProperties* properties) {
    720   return
    721     visitor->Visit("linearTilingFeatures", &properties->linearTilingFeatures) &&
    722     visitor->Visit("optimalTilingFeatures", &properties->optimalTilingFeatures) &&
    723     visitor->Visit("bufferFeatures", &properties->bufferFeatures);
    724 }
    725 
    726 template <typename Visitor>
    727 inline bool Iterate(Visitor* visitor, VkJsonLayer* layer) {
    728   return visitor->Visit("properties", &layer->properties) &&
    729          visitor->Visit("extensions", &layer->extensions);
    730 }
    731 
    732 template <typename Visitor>
    733 inline bool Iterate(Visitor* visitor, VkJsonDeviceGroup* device_group) {
    734   return visitor->Visit("devices", &device_group->device_inds) &&
    735          visitor->Visit("subsetAllocation",
    736                         &device_group->properties.subsetAllocation);
    737 }
    738 
    739 template <typename Visitor>
    740 inline bool Iterate(Visitor* visitor, VkJsonDevice* device) {
    741   bool ret = true;
    742   switch (device->properties.apiVersion ^
    743           VK_VERSION_PATCH(device->properties.apiVersion)) {
    744     case VK_API_VERSION_1_1:
    745       ret &=
    746           visitor->Visit("subgroupProperties", &device->subgroup_properties) &&
    747           visitor->Visit("pointClippingProperties",
    748                          &device->point_clipping_properties) &&
    749           visitor->Visit("multiviewProperties",
    750                          &device->multiview_properties) &&
    751           visitor->Visit("idProperties", &device->id_properties) &&
    752           visitor->Visit("maintenance3Properties",
    753                          &device->maintenance3_properties) &&
    754           visitor->Visit("16bitStorageFeatures",
    755                          &device->bit16_storage_features) &&
    756           visitor->Visit("multiviewFeatures", &device->multiview_features) &&
    757           visitor->Visit("variablePointerFeatures",
    758                          &device->variable_pointer_features) &&
    759           visitor->Visit("protectedMemoryFeatures",
    760                          &device->protected_memory_features) &&
    761           visitor->Visit("samplerYcbcrConversionFeatures",
    762                          &device->sampler_ycbcr_conversion_features) &&
    763           visitor->Visit("shaderDrawParameterFeatures",
    764                          &device->shader_draw_parameter_features) &&
    765           visitor->Visit("externalFenceProperties",
    766                          &device->external_fence_properties) &&
    767           visitor->Visit("externalSemaphoreProperties",
    768                          &device->external_semaphore_properties);
    769     case VK_API_VERSION_1_0:
    770       ret &= visitor->Visit("properties", &device->properties) &&
    771              visitor->Visit("features", &device->features) &&
    772              visitor->Visit("VK_KHR_variable_pointers",
    773                             &device->ext_variable_pointer_features) &&
    774              visitor->Visit("memory", &device->memory) &&
    775              visitor->Visit("queues", &device->queues) &&
    776              visitor->Visit("extensions", &device->extensions) &&
    777              visitor->Visit("layers", &device->layers) &&
    778              visitor->Visit("formats", &device->formats);
    779   }
    780   return ret;
    781 }
    782 
    783 template <typename Visitor>
    784 inline bool Iterate(Visitor* visitor, VkJsonInstance* instance) {
    785   bool ret = true;
    786   switch (instance->api_version ^ VK_VERSION_PATCH(instance->api_version)) {
    787     case VK_API_VERSION_1_1:
    788       ret &= visitor->Visit("deviceGroups", &instance->device_groups);
    789     case VK_API_VERSION_1_0:
    790       ret &= visitor->Visit("layers", &instance->layers) &&
    791              visitor->Visit("extensions", &instance->extensions) &&
    792              visitor->Visit("devices", &instance->devices);
    793   }
    794   return ret;
    795 }
    796 
    797 template <typename T>
    798 using EnableForArithmetic =
    799     typename std::enable_if<std::is_arithmetic<T>::value, void>::type;
    800 
    801 template <typename T>
    802 using EnableForStruct =
    803     typename std::enable_if<std::is_class<T>::value, void>::type;
    804 
    805 template <typename T>
    806 using EnableForEnum =
    807     typename std::enable_if<std::is_enum<T>::value, void>::type;
    808 
    809 template <typename T, typename = EnableForStruct<T>, typename = void>
    810 Json::Value ToJsonValue(const T& value);
    811 
    812 template <typename T, typename = EnableForArithmetic<T>>
    813 inline Json::Value ToJsonValue(const T& value) {
    814   return Json::Value(static_cast<double>(value));
    815 }
    816 
    817 inline Json::Value ToJsonValue(const uint64_t& value) {
    818   char string[19] = {0};  // "0x" + 16 digits + terminal \0
    819   snprintf(string, sizeof(string), "0x%016" PRIx64, value);
    820   return Json::Value(string);
    821 }
    822 
    823 template <typename T, typename = EnableForEnum<T>, typename = void,
    824           typename = void>
    825 inline Json::Value ToJsonValue(const T& value) {
    826   return Json::Value(static_cast<double>(value));
    827 }
    828 
    829 template <typename T>
    830 inline Json::Value ArrayToJsonValue(uint32_t count, const T* values) {
    831   Json::Value array(Json::arrayValue);
    832   for (unsigned int i = 0; i < count; ++i) array.append(ToJsonValue(values[i]));
    833   return array;
    834 }
    835 
    836 template <typename T, unsigned int N>
    837 inline Json::Value ToJsonValue(const T (&value)[N]) {
    838   return ArrayToJsonValue(N, value);
    839 }
    840 
    841 template <size_t N>
    842 inline Json::Value ToJsonValue(const char (&value)[N]) {
    843   assert(strlen(value) < N);
    844   return Json::Value(value);
    845 }
    846 
    847 template <typename T>
    848 inline Json::Value ToJsonValue(const std::vector<T>& value) {
    849   assert(value.size() <= std::numeric_limits<uint32_t>::max());
    850   return ArrayToJsonValue(static_cast<uint32_t>(value.size()), value.data());
    851 }
    852 
    853 template <typename F, typename S>
    854 inline Json::Value ToJsonValue(const std::pair<F, S>& value) {
    855   Json::Value array(Json::arrayValue);
    856   array.append(ToJsonValue(value.first));
    857   array.append(ToJsonValue(value.second));
    858   return array;
    859 }
    860 
    861 template <typename F, typename S>
    862 inline Json::Value ToJsonValue(const std::map<F, S>& value) {
    863   Json::Value array(Json::arrayValue);
    864   for (auto& kv : value) array.append(ToJsonValue(kv));
    865   return array;
    866 }
    867 
    868 class JsonWriterVisitor {
    869  public:
    870   JsonWriterVisitor() : object_(Json::objectValue) {}
    871 
    872   ~JsonWriterVisitor() {}
    873 
    874   template <typename T> bool Visit(const char* key, const T* value) {
    875     object_[key] = ToJsonValue(*value);
    876     return true;
    877   }
    878 
    879   template <typename T, uint32_t N>
    880   bool VisitArray(const char* key, uint32_t count, const T (*value)[N]) {
    881     assert(count <= N);
    882     object_[key] = ArrayToJsonValue(count, *value);
    883     return true;
    884   }
    885 
    886   Json::Value get_object() const { return object_; }
    887 
    888  private:
    889   Json::Value object_;
    890 };
    891 
    892 template <typename Visitor, typename T>
    893 inline void VisitForWrite(Visitor* visitor, const T& t) {
    894   Iterate(visitor, const_cast<T*>(&t));
    895 }
    896 
    897 template <typename T, typename /*= EnableForStruct<T>*/, typename /*= void*/>
    898 Json::Value ToJsonValue(const T& value) {
    899   JsonWriterVisitor visitor;
    900   VisitForWrite(&visitor, value);
    901   return visitor.get_object();
    902 }
    903 
    904 template <typename T, typename = EnableForStruct<T>>
    905 bool AsValue(Json::Value* json_value, T* t);
    906 
    907 inline bool AsValue(Json::Value* json_value, int32_t* value) {
    908   if (json_value->type() != Json::realValue) return false;
    909   double d = json_value->asDouble();
    910   if (!IsIntegral(d) ||
    911       d < static_cast<double>(std::numeric_limits<int32_t>::min()) ||
    912       d > static_cast<double>(std::numeric_limits<int32_t>::max()))
    913     return false;
    914   *value = static_cast<int32_t>(d);
    915   return true;
    916 }
    917 
    918 inline bool AsValue(Json::Value* json_value, uint64_t* value) {
    919   if (json_value->type() != Json::stringValue) return false;
    920   int result =
    921       std::sscanf(json_value->asString().c_str(), "0x%016" PRIx64, value);
    922   return result == 1;
    923 }
    924 
    925 inline bool AsValue(Json::Value* json_value, uint32_t* value) {
    926   if (json_value->type() != Json::realValue) return false;
    927   double d = json_value->asDouble();
    928   if (!IsIntegral(d) || d < 0.0 ||
    929       d > static_cast<double>(std::numeric_limits<uint32_t>::max()))
    930     return false;
    931   *value = static_cast<uint32_t>(d);
    932   return true;
    933 }
    934 
    935 inline bool AsValue(Json::Value* json_value, uint8_t* value) {
    936   uint32_t value32 = 0;
    937   AsValue(json_value, &value32);
    938   if (value32 > std::numeric_limits<uint8_t>::max())
    939     return false;
    940   *value = static_cast<uint8_t>(value32);
    941   return true;
    942 }
    943 
    944 inline bool AsValue(Json::Value* json_value, float* value) {
    945   if (json_value->type() != Json::realValue) return false;
    946   *value = static_cast<float>(json_value->asDouble());
    947   return true;
    948 }
    949 
    950 template <typename T>
    951 inline bool AsArray(Json::Value* json_value, uint32_t count, T* values) {
    952   if (json_value->type() != Json::arrayValue || json_value->size() != count)
    953     return false;
    954   for (uint32_t i = 0; i < count; ++i) {
    955     if (!AsValue(&(*json_value)[i], values + i)) return false;
    956   }
    957   return true;
    958 }
    959 
    960 template <typename T, unsigned int N>
    961 inline bool AsValue(Json::Value* json_value, T (*value)[N]) {
    962   return AsArray(json_value, N, *value);
    963 }
    964 
    965 template <size_t N>
    966 inline bool AsValue(Json::Value* json_value, char (*value)[N]) {
    967   if (json_value->type() != Json::stringValue) return false;
    968   size_t len = json_value->asString().length();
    969   if (len >= N)
    970     return false;
    971   memcpy(*value, json_value->asString().c_str(), len);
    972   memset(*value + len, 0, N-len);
    973   return true;
    974 }
    975 
    976 template <typename T, typename = EnableForEnum<T>, typename = void>
    977 inline bool AsValue(Json::Value* json_value, T* t) {
    978   uint32_t value = 0;
    979   if (!AsValue(json_value, &value))
    980       return false;
    981   if (!EnumTraits<T>::exist(value)) return false;
    982   *t = static_cast<T>(value);
    983   return true;
    984 }
    985 
    986 template <typename T>
    987 inline bool AsValue(Json::Value* json_value, std::vector<T>* value) {
    988   if (json_value->type() != Json::arrayValue) return false;
    989   int size = json_value->size();
    990   value->resize(size);
    991   return AsArray(json_value, size, value->data());
    992 }
    993 
    994 template <typename F, typename S>
    995 inline bool AsValue(Json::Value* json_value, std::pair<F, S>* value) {
    996   if (json_value->type() != Json::arrayValue || json_value->size() != 2)
    997     return false;
    998   return AsValue(&(*json_value)[0], &value->first) &&
    999          AsValue(&(*json_value)[1], &value->second);
   1000 }
   1001 
   1002 template <typename F, typename S>
   1003 inline bool AsValue(Json::Value* json_value, std::map<F, S>* value) {
   1004   if (json_value->type() != Json::arrayValue) return false;
   1005   int size = json_value->size();
   1006   for (int i = 0; i < size; ++i) {
   1007     std::pair<F, S> elem;
   1008     if (!AsValue(&(*json_value)[i], &elem)) return false;
   1009     if (!value->insert(elem).second)
   1010       return false;
   1011   }
   1012   return true;
   1013 }
   1014 
   1015 template <typename T>
   1016 bool ReadValue(Json::Value* object, const char* key, T* value,
   1017                std::string* errors) {
   1018   Json::Value json_value = (*object)[key];
   1019   if (!json_value) {
   1020     if (errors)
   1021       *errors = std::string(key) + " missing.";
   1022     return false;
   1023   }
   1024   if (AsValue(&json_value, value)) return true;
   1025   if (errors)
   1026     *errors = std::string("Wrong type for ") + std::string(key) + ".";
   1027   return false;
   1028 }
   1029 
   1030 template <typename Visitor, typename T>
   1031 inline bool VisitForRead(Visitor* visitor, T* t) {
   1032   return Iterate(visitor, t);
   1033 }
   1034 
   1035 class JsonReaderVisitor {
   1036  public:
   1037   JsonReaderVisitor(Json::Value* object, std::string* errors)
   1038       : object_(object), errors_(errors) {}
   1039 
   1040   template <typename T> bool Visit(const char* key, T* value) const {
   1041     return ReadValue(object_, key, value, errors_);
   1042   }
   1043 
   1044   template <typename T, uint32_t N>
   1045   bool VisitArray(const char* key, uint32_t count, T (*value)[N]) {
   1046     if (count > N)
   1047       return false;
   1048     Json::Value json_value = (*object_)[key];
   1049     if (!json_value) {
   1050       if (errors_)
   1051         *errors_ = std::string(key) + " missing.";
   1052       return false;
   1053     }
   1054     if (AsArray(&json_value, count, *value)) return true;
   1055     if (errors_)
   1056       *errors_ = std::string("Wrong type for ") + std::string(key) + ".";
   1057     return false;
   1058   }
   1059 
   1060 
   1061  private:
   1062   Json::Value* object_;
   1063   std::string* errors_;
   1064 };
   1065 
   1066 template <typename T, typename /*= EnableForStruct<T>*/>
   1067 bool AsValue(Json::Value* json_value, T* t) {
   1068   if (json_value->type() != Json::objectValue) return false;
   1069   JsonReaderVisitor visitor(json_value, nullptr);
   1070   return VisitForRead(&visitor, t);
   1071 }
   1072 
   1073 
   1074 template <typename T> std::string VkTypeToJson(const T& t) {
   1075   JsonWriterVisitor visitor;
   1076   VisitForWrite(&visitor, t);
   1077   return visitor.get_object().toStyledString();
   1078 }
   1079 
   1080 template <typename T> bool VkTypeFromJson(const std::string& json,
   1081                                           T* t,
   1082                                           std::string* errors) {
   1083   *t = T();
   1084   Json::Value object(Json::objectValue);
   1085   Json::Reader reader;
   1086   reader.parse(json, object, false);
   1087   if (!object) {
   1088     if (errors) errors->assign(reader.getFormatedErrorMessages());
   1089     return false;
   1090   }
   1091   return AsValue(&object, t);
   1092 }
   1093 
   1094 }  // anonymous namespace
   1095 
   1096 std::string VkJsonInstanceToJson(const VkJsonInstance& instance) {
   1097   return VkTypeToJson(instance);
   1098 }
   1099 
   1100 bool VkJsonInstanceFromJson(const std::string& json,
   1101                             VkJsonInstance* instance,
   1102                             std::string* errors) {
   1103   return VkTypeFromJson(json, instance, errors);
   1104 }
   1105 
   1106 std::string VkJsonDeviceToJson(const VkJsonDevice& device) {
   1107   return VkTypeToJson(device);
   1108 }
   1109 
   1110 bool VkJsonDeviceFromJson(const std::string& json,
   1111                           VkJsonDevice* device,
   1112                           std::string* errors) {
   1113   return VkTypeFromJson(json, device, errors);
   1114 };
   1115 
   1116 std::string VkJsonImageFormatPropertiesToJson(
   1117     const VkImageFormatProperties& properties) {
   1118   return VkTypeToJson(properties);
   1119 }
   1120 
   1121 bool VkJsonImageFormatPropertiesFromJson(const std::string& json,
   1122                                          VkImageFormatProperties* properties,
   1123                                          std::string* errors) {
   1124   return VkTypeFromJson(json, properties, errors);
   1125 };
   1126