diff --git a/vulkan/Android.bp b/vulkan/Android.bp
index a49b6dd..b15bed9 100644
--- a/vulkan/Android.bp
+++ b/vulkan/Android.bp
@@ -55,4 +55,5 @@
     "nulldrv",
     "libvulkan",
     "tools",
+    "vkjson",
 ]
diff --git a/vulkan/vkjson/.clang-format b/vulkan/vkjson/.clang-format
new file mode 100644
index 0000000..3f19e61
--- /dev/null
+++ b/vulkan/vkjson/.clang-format
@@ -0,0 +1 @@
+BasedOnStyle: Chromium
diff --git a/vulkan/vkjson/Android.bp b/vulkan/vkjson/Android.bp
new file mode 100644
index 0000000..1b32e7a
--- /dev/null
+++ b/vulkan/vkjson/Android.bp
@@ -0,0 +1,52 @@
+cc_library_static {
+    name: "libvkjson",
+    srcs: [
+        "vkjson.cc",
+        "vkjson_instance.cc",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    cppflags: [
+        "-std=c++11",
+        "-Wno-sign-compare",
+    ],
+    export_include_dirs: [
+        ".",
+    ],
+    whole_static_libs: [
+        "cjson",
+    ],
+    header_libs: [
+        "vulkan_headers",
+    ],
+}
+
+cc_library_static {
+    name: "libvkjson_ndk",
+    clang: true,
+    srcs: [
+        "vkjson.cc",
+        "vkjson_instance.cc",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    cppflags: [
+        "-std=c++11",
+        "-Wno-sign-compare",
+    ],
+    export_include_dirs: [
+        ".",
+    ],
+    whole_static_libs: [
+        "cjson_ndk",
+    ],
+    header_libs: [
+        "vulkan_headers_ndk",
+    ],
+    sdk_version: "24",
+    stl: "libc++_static",
+}
diff --git a/vulkan/vkjson/vkjson.cc b/vulkan/vkjson/vkjson.cc
new file mode 100644
index 0000000..704ca96
--- /dev/null
+++ b/vulkan/vkjson/vkjson.cc
@@ -0,0 +1,1148 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2015-2016 The Khronos Group Inc.
+// Copyright (c) 2015-2016 Valve Corporation
+// Copyright (c) 2015-2016 LunarG, Inc.
+// Copyright (c) 2015-2016 Google, 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.
+///////////////////////////////////////////////////////////////////////////////
+
+#include "vkjson.h"
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <cmath>
+#include <cinttypes>
+#include <cstdio>
+#include <limits>
+#include <memory>
+#include <sstream>
+#include <type_traits>
+#include <utility>
+
+#include <cJSON.h>
+
+namespace {
+
+inline bool IsIntegral(double value) {
+#if defined(ANDROID)
+  // Android NDK doesn't provide std::trunc yet
+  return trunc(value) == value;
+#else
+  return std::trunc(value) == value;
+#endif
+}
+
+template <typename T> struct EnumTraits;
+template <> struct EnumTraits<VkPhysicalDeviceType> {
+  static uint32_t min() { return VK_PHYSICAL_DEVICE_TYPE_BEGIN_RANGE; }
+  static uint32_t max() { return VK_PHYSICAL_DEVICE_TYPE_END_RANGE; }
+  static bool exist(uint32_t e) { return e >= min() && e <= max(); }
+};
+
+template <> struct EnumTraits<VkFormat> {
+  static bool exist(uint32_t e) {
+    switch (e) {
+      case VK_FORMAT_UNDEFINED:
+      case VK_FORMAT_R4G4_UNORM_PACK8:
+      case VK_FORMAT_R4G4B4A4_UNORM_PACK16:
+      case VK_FORMAT_B4G4R4A4_UNORM_PACK16:
+      case VK_FORMAT_R5G6B5_UNORM_PACK16:
+      case VK_FORMAT_B5G6R5_UNORM_PACK16:
+      case VK_FORMAT_R5G5B5A1_UNORM_PACK16:
+      case VK_FORMAT_B5G5R5A1_UNORM_PACK16:
+      case VK_FORMAT_A1R5G5B5_UNORM_PACK16:
+      case VK_FORMAT_R8_UNORM:
+      case VK_FORMAT_R8_SNORM:
+      case VK_FORMAT_R8_USCALED:
+      case VK_FORMAT_R8_SSCALED:
+      case VK_FORMAT_R8_UINT:
+      case VK_FORMAT_R8_SINT:
+      case VK_FORMAT_R8_SRGB:
+      case VK_FORMAT_R8G8_UNORM:
+      case VK_FORMAT_R8G8_SNORM:
+      case VK_FORMAT_R8G8_USCALED:
+      case VK_FORMAT_R8G8_SSCALED:
+      case VK_FORMAT_R8G8_UINT:
+      case VK_FORMAT_R8G8_SINT:
+      case VK_FORMAT_R8G8_SRGB:
+      case VK_FORMAT_R8G8B8_UNORM:
+      case VK_FORMAT_R8G8B8_SNORM:
+      case VK_FORMAT_R8G8B8_USCALED:
+      case VK_FORMAT_R8G8B8_SSCALED:
+      case VK_FORMAT_R8G8B8_UINT:
+      case VK_FORMAT_R8G8B8_SINT:
+      case VK_FORMAT_R8G8B8_SRGB:
+      case VK_FORMAT_B8G8R8_UNORM:
+      case VK_FORMAT_B8G8R8_SNORM:
+      case VK_FORMAT_B8G8R8_USCALED:
+      case VK_FORMAT_B8G8R8_SSCALED:
+      case VK_FORMAT_B8G8R8_UINT:
+      case VK_FORMAT_B8G8R8_SINT:
+      case VK_FORMAT_B8G8R8_SRGB:
+      case VK_FORMAT_R8G8B8A8_UNORM:
+      case VK_FORMAT_R8G8B8A8_SNORM:
+      case VK_FORMAT_R8G8B8A8_USCALED:
+      case VK_FORMAT_R8G8B8A8_SSCALED:
+      case VK_FORMAT_R8G8B8A8_UINT:
+      case VK_FORMAT_R8G8B8A8_SINT:
+      case VK_FORMAT_R8G8B8A8_SRGB:
+      case VK_FORMAT_B8G8R8A8_UNORM:
+      case VK_FORMAT_B8G8R8A8_SNORM:
+      case VK_FORMAT_B8G8R8A8_USCALED:
+      case VK_FORMAT_B8G8R8A8_SSCALED:
+      case VK_FORMAT_B8G8R8A8_UINT:
+      case VK_FORMAT_B8G8R8A8_SINT:
+      case VK_FORMAT_B8G8R8A8_SRGB:
+      case VK_FORMAT_A8B8G8R8_UNORM_PACK32:
+      case VK_FORMAT_A8B8G8R8_SNORM_PACK32:
+      case VK_FORMAT_A8B8G8R8_USCALED_PACK32:
+      case VK_FORMAT_A8B8G8R8_SSCALED_PACK32:
+      case VK_FORMAT_A8B8G8R8_UINT_PACK32:
+      case VK_FORMAT_A8B8G8R8_SINT_PACK32:
+      case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
+      case VK_FORMAT_A2R10G10B10_UNORM_PACK32:
+      case VK_FORMAT_A2R10G10B10_SNORM_PACK32:
+      case VK_FORMAT_A2R10G10B10_USCALED_PACK32:
+      case VK_FORMAT_A2R10G10B10_SSCALED_PACK32:
+      case VK_FORMAT_A2R10G10B10_UINT_PACK32:
+      case VK_FORMAT_A2R10G10B10_SINT_PACK32:
+      case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
+      case VK_FORMAT_A2B10G10R10_SNORM_PACK32:
+      case VK_FORMAT_A2B10G10R10_USCALED_PACK32:
+      case VK_FORMAT_A2B10G10R10_SSCALED_PACK32:
+      case VK_FORMAT_A2B10G10R10_UINT_PACK32:
+      case VK_FORMAT_A2B10G10R10_SINT_PACK32:
+      case VK_FORMAT_R16_UNORM:
+      case VK_FORMAT_R16_SNORM:
+      case VK_FORMAT_R16_USCALED:
+      case VK_FORMAT_R16_SSCALED:
+      case VK_FORMAT_R16_UINT:
+      case VK_FORMAT_R16_SINT:
+      case VK_FORMAT_R16_SFLOAT:
+      case VK_FORMAT_R16G16_UNORM:
+      case VK_FORMAT_R16G16_SNORM:
+      case VK_FORMAT_R16G16_USCALED:
+      case VK_FORMAT_R16G16_SSCALED:
+      case VK_FORMAT_R16G16_UINT:
+      case VK_FORMAT_R16G16_SINT:
+      case VK_FORMAT_R16G16_SFLOAT:
+      case VK_FORMAT_R16G16B16_UNORM:
+      case VK_FORMAT_R16G16B16_SNORM:
+      case VK_FORMAT_R16G16B16_USCALED:
+      case VK_FORMAT_R16G16B16_SSCALED:
+      case VK_FORMAT_R16G16B16_UINT:
+      case VK_FORMAT_R16G16B16_SINT:
+      case VK_FORMAT_R16G16B16_SFLOAT:
+      case VK_FORMAT_R16G16B16A16_UNORM:
+      case VK_FORMAT_R16G16B16A16_SNORM:
+      case VK_FORMAT_R16G16B16A16_USCALED:
+      case VK_FORMAT_R16G16B16A16_SSCALED:
+      case VK_FORMAT_R16G16B16A16_UINT:
+      case VK_FORMAT_R16G16B16A16_SINT:
+      case VK_FORMAT_R16G16B16A16_SFLOAT:
+      case VK_FORMAT_R32_UINT:
+      case VK_FORMAT_R32_SINT:
+      case VK_FORMAT_R32_SFLOAT:
+      case VK_FORMAT_R32G32_UINT:
+      case VK_FORMAT_R32G32_SINT:
+      case VK_FORMAT_R32G32_SFLOAT:
+      case VK_FORMAT_R32G32B32_UINT:
+      case VK_FORMAT_R32G32B32_SINT:
+      case VK_FORMAT_R32G32B32_SFLOAT:
+      case VK_FORMAT_R32G32B32A32_UINT:
+      case VK_FORMAT_R32G32B32A32_SINT:
+      case VK_FORMAT_R32G32B32A32_SFLOAT:
+      case VK_FORMAT_R64_UINT:
+      case VK_FORMAT_R64_SINT:
+      case VK_FORMAT_R64_SFLOAT:
+      case VK_FORMAT_R64G64_UINT:
+      case VK_FORMAT_R64G64_SINT:
+      case VK_FORMAT_R64G64_SFLOAT:
+      case VK_FORMAT_R64G64B64_UINT:
+      case VK_FORMAT_R64G64B64_SINT:
+      case VK_FORMAT_R64G64B64_SFLOAT:
+      case VK_FORMAT_R64G64B64A64_UINT:
+      case VK_FORMAT_R64G64B64A64_SINT:
+      case VK_FORMAT_R64G64B64A64_SFLOAT:
+      case VK_FORMAT_B10G11R11_UFLOAT_PACK32:
+      case VK_FORMAT_E5B9G9R9_UFLOAT_PACK32:
+      case VK_FORMAT_D16_UNORM:
+      case VK_FORMAT_X8_D24_UNORM_PACK32:
+      case VK_FORMAT_D32_SFLOAT:
+      case VK_FORMAT_S8_UINT:
+      case VK_FORMAT_D16_UNORM_S8_UINT:
+      case VK_FORMAT_D24_UNORM_S8_UINT:
+      case VK_FORMAT_D32_SFLOAT_S8_UINT:
+      case VK_FORMAT_BC1_RGB_UNORM_BLOCK:
+      case VK_FORMAT_BC1_RGB_SRGB_BLOCK:
+      case VK_FORMAT_BC1_RGBA_UNORM_BLOCK:
+      case VK_FORMAT_BC1_RGBA_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:
+      case VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG:
+      case VK_FORMAT_PVRTC1_4BPP_UNORM_BLOCK_IMG:
+      case VK_FORMAT_PVRTC2_2BPP_UNORM_BLOCK_IMG:
+      case VK_FORMAT_PVRTC2_4BPP_UNORM_BLOCK_IMG:
+      case VK_FORMAT_PVRTC1_2BPP_SRGB_BLOCK_IMG:
+      case VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG:
+      case VK_FORMAT_PVRTC2_2BPP_SRGB_BLOCK_IMG:
+      case VK_FORMAT_PVRTC2_4BPP_SRGB_BLOCK_IMG:
+      case VK_FORMAT_G8B8G8R8_422_UNORM_KHR:
+      case VK_FORMAT_B8G8R8G8_422_UNORM_KHR:
+      case VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM_KHR:
+      case VK_FORMAT_G8_B8R8_2PLANE_420_UNORM_KHR:
+      case VK_FORMAT_G8_B8_R8_3PLANE_422_UNORM_KHR:
+      case VK_FORMAT_G8_B8R8_2PLANE_422_UNORM_KHR:
+      case VK_FORMAT_G8_B8_R8_3PLANE_444_UNORM_KHR:
+      case VK_FORMAT_R10X6_UNORM_PACK16_KHR:
+      case VK_FORMAT_R10X6G10X6_UNORM_2PACK16_KHR:
+      case VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16_KHR:
+      case VK_FORMAT_G10X6B10X6G10X6R10X6_422_UNORM_4PACK16_KHR:
+      case VK_FORMAT_B10X6G10X6R10X6G10X6_422_UNORM_4PACK16_KHR:
+      case VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_422_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G10X6_B10X6R10X6_2PLANE_422_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G10X6_B10X6_R10X6_3PLANE_444_UNORM_3PACK16_KHR:
+      case VK_FORMAT_R12X4_UNORM_PACK16_KHR:
+      case VK_FORMAT_R12X4G12X4_UNORM_2PACK16_KHR:
+      case VK_FORMAT_R12X4G12X4B12X4A12X4_UNORM_4PACK16_KHR:
+      case VK_FORMAT_G12X4B12X4G12X4R12X4_422_UNORM_4PACK16_KHR:
+      case VK_FORMAT_B12X4G12X4R12X4G12X4_422_UNORM_4PACK16_KHR:
+      case VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_422_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G12X4_B12X4R12X4_2PLANE_422_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G12X4_B12X4_R12X4_3PLANE_444_UNORM_3PACK16_KHR:
+      case VK_FORMAT_G16B16G16R16_422_UNORM_KHR:
+      case VK_FORMAT_B16G16R16G16_422_UNORM_KHR:
+      case VK_FORMAT_G16_B16_R16_3PLANE_420_UNORM_KHR:
+      case VK_FORMAT_G16_B16R16_2PLANE_420_UNORM_KHR:
+      case VK_FORMAT_G16_B16_R16_3PLANE_422_UNORM_KHR:
+      case VK_FORMAT_G16_B16R16_2PLANE_422_UNORM_KHR:
+      case VK_FORMAT_G16_B16_R16_3PLANE_444_UNORM_KHR:
+        return true;
+    }
+    return false;
+  }
+};
+
+template <>
+struct EnumTraits<VkPointClippingBehavior> {
+  static uint32_t min() { return VK_POINT_CLIPPING_BEHAVIOR_BEGIN_RANGE; }
+  static uint32_t max() { return VK_POINT_CLIPPING_BEHAVIOR_END_RANGE; }
+  static bool exist(uint32_t e) { return e >= min() && e <= max(); }
+};
+
+template <>
+struct EnumTraits<VkExternalFenceHandleTypeFlagBits> {
+  static bool exist(uint32_t e) {
+    switch (e) {
+      case VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_FD_BIT:
+      case VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_WIN32_BIT:
+      case VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_WIN32_KMT_BIT:
+      case VK_EXTERNAL_FENCE_HANDLE_TYPE_SYNC_FD_BIT:
+        return true;
+    }
+    return false;
+  }
+};
+
+template <>
+struct EnumTraits<VkExternalSemaphoreHandleTypeFlagBits> {
+  static bool exist(uint32_t e) {
+    switch (e) {
+      case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT:
+      case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_BIT:
+      case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_KMT_BIT:
+      case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_D3D12_FENCE_BIT:
+      case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT:
+        return true;
+    }
+    return false;
+  }
+};
+
+// VkSparseImageFormatProperties
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkExtent3D* extents) {
+  return
+    visitor->Visit("width", &extents->width) &&
+    visitor->Visit("height", &extents->height) &&
+    visitor->Visit("depth", &extents->depth);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkImageFormatProperties* properties) {
+  return
+    visitor->Visit("maxExtent", &properties->maxExtent) &&
+    visitor->Visit("maxMipLevels", &properties->maxMipLevels) &&
+    visitor->Visit("maxArrayLayers", &properties->maxArrayLayers) &&
+    visitor->Visit("sampleCounts", &properties->sampleCounts) &&
+    visitor->Visit("maxResourceSize", &properties->maxResourceSize);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkPhysicalDeviceLimits* limits) {
+  return
+    visitor->Visit("maxImageDimension1D", &limits->maxImageDimension1D) &&
+    visitor->Visit("maxImageDimension2D", &limits->maxImageDimension2D) &&
+    visitor->Visit("maxImageDimension3D", &limits->maxImageDimension3D) &&
+    visitor->Visit("maxImageDimensionCube", &limits->maxImageDimensionCube) &&
+    visitor->Visit("maxImageArrayLayers", &limits->maxImageArrayLayers) &&
+    visitor->Visit("maxTexelBufferElements", &limits->maxTexelBufferElements) &&
+    visitor->Visit("maxUniformBufferRange", &limits->maxUniformBufferRange) &&
+    visitor->Visit("maxStorageBufferRange", &limits->maxStorageBufferRange) &&
+    visitor->Visit("maxPushConstantsSize", &limits->maxPushConstantsSize) &&
+    visitor->Visit("maxMemoryAllocationCount", &limits->maxMemoryAllocationCount) &&
+    visitor->Visit("maxSamplerAllocationCount", &limits->maxSamplerAllocationCount) &&
+    visitor->Visit("bufferImageGranularity", &limits->bufferImageGranularity) &&
+    visitor->Visit("sparseAddressSpaceSize", &limits->sparseAddressSpaceSize) &&
+    visitor->Visit("maxBoundDescriptorSets", &limits->maxBoundDescriptorSets) &&
+    visitor->Visit("maxPerStageDescriptorSamplers", &limits->maxPerStageDescriptorSamplers) &&
+    visitor->Visit("maxPerStageDescriptorUniformBuffers", &limits->maxPerStageDescriptorUniformBuffers) &&
+    visitor->Visit("maxPerStageDescriptorStorageBuffers", &limits->maxPerStageDescriptorStorageBuffers) &&
+    visitor->Visit("maxPerStageDescriptorSampledImages", &limits->maxPerStageDescriptorSampledImages) &&
+    visitor->Visit("maxPerStageDescriptorStorageImages", &limits->maxPerStageDescriptorStorageImages) &&
+    visitor->Visit("maxPerStageDescriptorInputAttachments", &limits->maxPerStageDescriptorInputAttachments) &&
+    visitor->Visit("maxPerStageResources", &limits->maxPerStageResources) &&
+    visitor->Visit("maxDescriptorSetSamplers", &limits->maxDescriptorSetSamplers) &&
+    visitor->Visit("maxDescriptorSetUniformBuffers", &limits->maxDescriptorSetUniformBuffers) &&
+    visitor->Visit("maxDescriptorSetUniformBuffersDynamic", &limits->maxDescriptorSetUniformBuffersDynamic) &&
+    visitor->Visit("maxDescriptorSetStorageBuffers", &limits->maxDescriptorSetStorageBuffers) &&
+    visitor->Visit("maxDescriptorSetStorageBuffersDynamic", &limits->maxDescriptorSetStorageBuffersDynamic) &&
+    visitor->Visit("maxDescriptorSetSampledImages", &limits->maxDescriptorSetSampledImages) &&
+    visitor->Visit("maxDescriptorSetStorageImages", &limits->maxDescriptorSetStorageImages) &&
+    visitor->Visit("maxDescriptorSetInputAttachments", &limits->maxDescriptorSetInputAttachments) &&
+    visitor->Visit("maxVertexInputAttributes", &limits->maxVertexInputAttributes) &&
+    visitor->Visit("maxVertexInputBindings", &limits->maxVertexInputBindings) &&
+    visitor->Visit("maxVertexInputAttributeOffset", &limits->maxVertexInputAttributeOffset) &&
+    visitor->Visit("maxVertexInputBindingStride", &limits->maxVertexInputBindingStride) &&
+    visitor->Visit("maxVertexOutputComponents", &limits->maxVertexOutputComponents) &&
+    visitor->Visit("maxTessellationGenerationLevel", &limits->maxTessellationGenerationLevel) &&
+    visitor->Visit("maxTessellationPatchSize", &limits->maxTessellationPatchSize) &&
+    visitor->Visit("maxTessellationControlPerVertexInputComponents", &limits->maxTessellationControlPerVertexInputComponents) &&
+    visitor->Visit("maxTessellationControlPerVertexOutputComponents", &limits->maxTessellationControlPerVertexOutputComponents) &&
+    visitor->Visit("maxTessellationControlPerPatchOutputComponents", &limits->maxTessellationControlPerPatchOutputComponents) &&
+    visitor->Visit("maxTessellationControlTotalOutputComponents", &limits->maxTessellationControlTotalOutputComponents) &&
+    visitor->Visit("maxTessellationEvaluationInputComponents", &limits->maxTessellationEvaluationInputComponents) &&
+    visitor->Visit("maxTessellationEvaluationOutputComponents", &limits->maxTessellationEvaluationOutputComponents) &&
+    visitor->Visit("maxGeometryShaderInvocations", &limits->maxGeometryShaderInvocations) &&
+    visitor->Visit("maxGeometryInputComponents", &limits->maxGeometryInputComponents) &&
+    visitor->Visit("maxGeometryOutputComponents", &limits->maxGeometryOutputComponents) &&
+    visitor->Visit("maxGeometryOutputVertices", &limits->maxGeometryOutputVertices) &&
+    visitor->Visit("maxGeometryTotalOutputComponents", &limits->maxGeometryTotalOutputComponents) &&
+    visitor->Visit("maxFragmentInputComponents", &limits->maxFragmentInputComponents) &&
+    visitor->Visit("maxFragmentOutputAttachments", &limits->maxFragmentOutputAttachments) &&
+    visitor->Visit("maxFragmentDualSrcAttachments", &limits->maxFragmentDualSrcAttachments) &&
+    visitor->Visit("maxFragmentCombinedOutputResources", &limits->maxFragmentCombinedOutputResources) &&
+    visitor->Visit("maxComputeSharedMemorySize", &limits->maxComputeSharedMemorySize) &&
+    visitor->Visit("maxComputeWorkGroupCount", &limits->maxComputeWorkGroupCount) &&
+    visitor->Visit("maxComputeWorkGroupInvocations", &limits->maxComputeWorkGroupInvocations) &&
+    visitor->Visit("maxComputeWorkGroupSize", &limits->maxComputeWorkGroupSize) &&
+    visitor->Visit("subPixelPrecisionBits", &limits->subPixelPrecisionBits) &&
+    visitor->Visit("subTexelPrecisionBits", &limits->subTexelPrecisionBits) &&
+    visitor->Visit("mipmapPrecisionBits", &limits->mipmapPrecisionBits) &&
+    visitor->Visit("maxDrawIndexedIndexValue", &limits->maxDrawIndexedIndexValue) &&
+    visitor->Visit("maxDrawIndirectCount", &limits->maxDrawIndirectCount) &&
+    visitor->Visit("maxSamplerLodBias", &limits->maxSamplerLodBias) &&
+    visitor->Visit("maxSamplerAnisotropy", &limits->maxSamplerAnisotropy) &&
+    visitor->Visit("maxViewports", &limits->maxViewports) &&
+    visitor->Visit("maxViewportDimensions", &limits->maxViewportDimensions) &&
+    visitor->Visit("viewportBoundsRange", &limits->viewportBoundsRange) &&
+    visitor->Visit("viewportSubPixelBits", &limits->viewportSubPixelBits) &&
+    visitor->Visit("minMemoryMapAlignment", &limits->minMemoryMapAlignment) &&
+    visitor->Visit("minTexelBufferOffsetAlignment", &limits->minTexelBufferOffsetAlignment) &&
+    visitor->Visit("minUniformBufferOffsetAlignment", &limits->minUniformBufferOffsetAlignment) &&
+    visitor->Visit("minStorageBufferOffsetAlignment", &limits->minStorageBufferOffsetAlignment) &&
+    visitor->Visit("minTexelOffset", &limits->minTexelOffset) &&
+    visitor->Visit("maxTexelOffset", &limits->maxTexelOffset) &&
+    visitor->Visit("minTexelGatherOffset", &limits->minTexelGatherOffset) &&
+    visitor->Visit("maxTexelGatherOffset", &limits->maxTexelGatherOffset) &&
+    visitor->Visit("minInterpolationOffset", &limits->minInterpolationOffset) &&
+    visitor->Visit("maxInterpolationOffset", &limits->maxInterpolationOffset) &&
+    visitor->Visit("subPixelInterpolationOffsetBits", &limits->subPixelInterpolationOffsetBits) &&
+    visitor->Visit("maxFramebufferWidth", &limits->maxFramebufferWidth) &&
+    visitor->Visit("maxFramebufferHeight", &limits->maxFramebufferHeight) &&
+    visitor->Visit("maxFramebufferLayers", &limits->maxFramebufferLayers) &&
+    visitor->Visit("framebufferColorSampleCounts", &limits->framebufferColorSampleCounts) &&
+    visitor->Visit("framebufferDepthSampleCounts", &limits->framebufferDepthSampleCounts) &&
+    visitor->Visit("framebufferStencilSampleCounts", &limits->framebufferStencilSampleCounts) &&
+    visitor->Visit("framebufferNoAttachmentsSampleCounts", &limits->framebufferNoAttachmentsSampleCounts) &&
+    visitor->Visit("maxColorAttachments", &limits->maxColorAttachments) &&
+    visitor->Visit("sampledImageColorSampleCounts", &limits->sampledImageColorSampleCounts) &&
+    visitor->Visit("sampledImageIntegerSampleCounts", &limits->sampledImageIntegerSampleCounts) &&
+    visitor->Visit("sampledImageDepthSampleCounts", &limits->sampledImageDepthSampleCounts) &&
+    visitor->Visit("sampledImageStencilSampleCounts", &limits->sampledImageStencilSampleCounts) &&
+    visitor->Visit("storageImageSampleCounts", &limits->storageImageSampleCounts) &&
+    visitor->Visit("maxSampleMaskWords", &limits->maxSampleMaskWords) &&
+    visitor->Visit("timestampComputeAndGraphics", &limits->timestampComputeAndGraphics) &&
+    visitor->Visit("timestampPeriod", &limits->timestampPeriod) &&
+    visitor->Visit("maxClipDistances", &limits->maxClipDistances) &&
+    visitor->Visit("maxCullDistances", &limits->maxCullDistances) &&
+    visitor->Visit("maxCombinedClipAndCullDistances", &limits->maxCombinedClipAndCullDistances) &&
+    visitor->Visit("discreteQueuePriorities", &limits->discreteQueuePriorities) &&
+    visitor->Visit("pointSizeRange", &limits->pointSizeRange) &&
+    visitor->Visit("lineWidthRange", &limits->lineWidthRange) &&
+    visitor->Visit("pointSizeGranularity", &limits->pointSizeGranularity) &&
+    visitor->Visit("lineWidthGranularity", &limits->lineWidthGranularity) &&
+    visitor->Visit("strictLines", &limits->strictLines) &&
+    visitor->Visit("standardSampleLocations", &limits->standardSampleLocations) &&
+    visitor->Visit("optimalBufferCopyOffsetAlignment", &limits->optimalBufferCopyOffsetAlignment) &&
+    visitor->Visit("optimalBufferCopyRowPitchAlignment", &limits->optimalBufferCopyRowPitchAlignment) &&
+    visitor->Visit("nonCoherentAtomSize", &limits->nonCoherentAtomSize);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceSparseProperties* properties) {
+  return
+    visitor->Visit("residencyStandard2DBlockShape", &properties->residencyStandard2DBlockShape) &&
+    visitor->Visit("residencyStandard2DMultisampleBlockShape", &properties->residencyStandard2DMultisampleBlockShape) &&
+    visitor->Visit("residencyStandard3DBlockShape", &properties->residencyStandard3DBlockShape) &&
+    visitor->Visit("residencyAlignedMipSize", &properties->residencyAlignedMipSize) &&
+    visitor->Visit("residencyNonResidentStrict", &properties->residencyNonResidentStrict);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceProperties* properties) {
+  return
+    visitor->Visit("apiVersion", &properties->apiVersion) &&
+    visitor->Visit("driverVersion", &properties->driverVersion) &&
+    visitor->Visit("vendorID", &properties->vendorID) &&
+    visitor->Visit("deviceID", &properties->deviceID) &&
+    visitor->Visit("deviceType", &properties->deviceType) &&
+    visitor->Visit("deviceName", &properties->deviceName) &&
+    visitor->Visit("pipelineCacheUUID", &properties->pipelineCacheUUID) &&
+    visitor->Visit("limits", &properties->limits) &&
+    visitor->Visit("sparseProperties", &properties->sparseProperties);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkPhysicalDeviceFeatures* features) {
+  return
+    visitor->Visit("robustBufferAccess", &features->robustBufferAccess) &&
+    visitor->Visit("fullDrawIndexUint32", &features->fullDrawIndexUint32) &&
+    visitor->Visit("imageCubeArray", &features->imageCubeArray) &&
+    visitor->Visit("independentBlend", &features->independentBlend) &&
+    visitor->Visit("geometryShader", &features->geometryShader) &&
+    visitor->Visit("tessellationShader", &features->tessellationShader) &&
+    visitor->Visit("sampleRateShading", &features->sampleRateShading) &&
+    visitor->Visit("dualSrcBlend", &features->dualSrcBlend) &&
+    visitor->Visit("logicOp", &features->logicOp) &&
+    visitor->Visit("multiDrawIndirect", &features->multiDrawIndirect) &&
+    visitor->Visit("drawIndirectFirstInstance", &features->drawIndirectFirstInstance) &&
+    visitor->Visit("depthClamp", &features->depthClamp) &&
+    visitor->Visit("depthBiasClamp", &features->depthBiasClamp) &&
+    visitor->Visit("fillModeNonSolid", &features->fillModeNonSolid) &&
+    visitor->Visit("depthBounds", &features->depthBounds) &&
+    visitor->Visit("wideLines", &features->wideLines) &&
+    visitor->Visit("largePoints", &features->largePoints) &&
+    visitor->Visit("alphaToOne", &features->alphaToOne) &&
+    visitor->Visit("multiViewport", &features->multiViewport) &&
+    visitor->Visit("samplerAnisotropy", &features->samplerAnisotropy) &&
+    visitor->Visit("textureCompressionETC2", &features->textureCompressionETC2) &&
+    visitor->Visit("textureCompressionASTC_LDR", &features->textureCompressionASTC_LDR) &&
+    visitor->Visit("textureCompressionBC", &features->textureCompressionBC) &&
+    visitor->Visit("occlusionQueryPrecise", &features->occlusionQueryPrecise) &&
+    visitor->Visit("pipelineStatisticsQuery", &features->pipelineStatisticsQuery) &&
+    visitor->Visit("vertexPipelineStoresAndAtomics", &features->vertexPipelineStoresAndAtomics) &&
+    visitor->Visit("fragmentStoresAndAtomics", &features->fragmentStoresAndAtomics) &&
+    visitor->Visit("shaderTessellationAndGeometryPointSize", &features->shaderTessellationAndGeometryPointSize) &&
+    visitor->Visit("shaderImageGatherExtended", &features->shaderImageGatherExtended) &&
+    visitor->Visit("shaderStorageImageExtendedFormats", &features->shaderStorageImageExtendedFormats) &&
+    visitor->Visit("shaderStorageImageMultisample", &features->shaderStorageImageMultisample) &&
+    visitor->Visit("shaderStorageImageReadWithoutFormat", &features->shaderStorageImageReadWithoutFormat) &&
+    visitor->Visit("shaderStorageImageWriteWithoutFormat", &features->shaderStorageImageWriteWithoutFormat) &&
+    visitor->Visit("shaderUniformBufferArrayDynamicIndexing", &features->shaderUniformBufferArrayDynamicIndexing) &&
+    visitor->Visit("shaderSampledImageArrayDynamicIndexing", &features->shaderSampledImageArrayDynamicIndexing) &&
+    visitor->Visit("shaderStorageBufferArrayDynamicIndexing", &features->shaderStorageBufferArrayDynamicIndexing) &&
+    visitor->Visit("shaderStorageImageArrayDynamicIndexing", &features->shaderStorageImageArrayDynamicIndexing) &&
+    visitor->Visit("shaderClipDistance", &features->shaderClipDistance) &&
+    visitor->Visit("shaderCullDistance", &features->shaderCullDistance) &&
+    visitor->Visit("shaderFloat64", &features->shaderFloat64) &&
+    visitor->Visit("shaderInt64", &features->shaderInt64) &&
+    visitor->Visit("shaderInt16", &features->shaderInt16) &&
+    visitor->Visit("shaderResourceResidency", &features->shaderResourceResidency) &&
+    visitor->Visit("shaderResourceMinLod", &features->shaderResourceMinLod) &&
+    visitor->Visit("sparseBinding", &features->sparseBinding) &&
+    visitor->Visit("sparseResidencyBuffer", &features->sparseResidencyBuffer) &&
+    visitor->Visit("sparseResidencyImage2D", &features->sparseResidencyImage2D) &&
+    visitor->Visit("sparseResidencyImage3D", &features->sparseResidencyImage3D) &&
+    visitor->Visit("sparseResidency2Samples", &features->sparseResidency2Samples) &&
+    visitor->Visit("sparseResidency4Samples", &features->sparseResidency4Samples) &&
+    visitor->Visit("sparseResidency8Samples", &features->sparseResidency8Samples) &&
+    visitor->Visit("sparseResidency16Samples", &features->sparseResidency16Samples) &&
+    visitor->Visit("sparseResidencyAliased", &features->sparseResidencyAliased) &&
+    visitor->Visit("variableMultisampleRate", &features->variableMultisampleRate) &&
+    visitor->Visit("inheritedQueries", &features->inheritedQueries);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkJsonExtVariablePointerFeatures* features) {
+  return visitor->Visit("variablePointerFeaturesKHR",
+                        &features->variable_pointer_features_khr);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkMemoryType* type) {
+  return
+    visitor->Visit("propertyFlags", &type->propertyFlags) &&
+    visitor->Visit("heapIndex", &type->heapIndex);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkMemoryHeap* heap) {
+  return
+    visitor->Visit("size", &heap->size) &&
+    visitor->Visit("flags", &heap->flags);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkPhysicalDeviceMemoryProperties* properties) {
+  return
+    visitor->Visit("memoryTypeCount", &properties->memoryTypeCount) &&
+    visitor->VisitArray("memoryTypes", properties->memoryTypeCount, &properties->memoryTypes) &&
+    visitor->Visit("memoryHeapCount", &properties->memoryHeapCount) &&
+    visitor->VisitArray("memoryHeaps", properties->memoryHeapCount, &properties->memoryHeaps);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceSubgroupProperties* properties) {
+  return visitor->Visit("subgroupSize", &properties->subgroupSize) &&
+         visitor->Visit("supportedStages", &properties->supportedStages) &&
+         visitor->Visit("supportedOperations",
+                        &properties->supportedOperations) &&
+         visitor->Visit("quadOperationsInAllStages",
+                        &properties->quadOperationsInAllStages);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDevicePointClippingProperties* properties) {
+  return visitor->Visit("pointClippingBehavior",
+                        &properties->pointClippingBehavior);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceMultiviewProperties* properties) {
+  return visitor->Visit("maxMultiviewViewCount",
+                        &properties->maxMultiviewViewCount) &&
+         visitor->Visit("maxMultiviewInstanceIndex",
+                        &properties->maxMultiviewInstanceIndex);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceIDProperties* properties) {
+  return visitor->Visit("deviceUUID", &properties->deviceUUID) &&
+         visitor->Visit("driverUUID", &properties->driverUUID) &&
+         visitor->Visit("deviceLUID", &properties->deviceLUID) &&
+         visitor->Visit("deviceNodeMask", &properties->deviceNodeMask) &&
+         visitor->Visit("deviceLUIDValid", &properties->deviceLUIDValid);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceMaintenance3Properties* properties) {
+  return visitor->Visit("maxPerSetDescriptors",
+                        &properties->maxPerSetDescriptors) &&
+         visitor->Visit("maxMemoryAllocationSize",
+                        &properties->maxMemoryAllocationSize);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDevice16BitStorageFeatures* features) {
+  return visitor->Visit("storageBuffer16BitAccess",
+                        &features->storageBuffer16BitAccess) &&
+         visitor->Visit("uniformAndStorageBuffer16BitAccess",
+                        &features->uniformAndStorageBuffer16BitAccess) &&
+         visitor->Visit("storagePushConstant16",
+                        &features->storagePushConstant16) &&
+         visitor->Visit("storageInputOutput16",
+                        &features->storageInputOutput16);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceMultiviewFeatures* features) {
+  return visitor->Visit("multiview", &features->multiview) &&
+         visitor->Visit("multiviewGeometryShader",
+                        &features->multiviewGeometryShader) &&
+         visitor->Visit("multiviewTessellationShader",
+                        &features->multiviewTessellationShader);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceVariablePointerFeatures* features) {
+  return visitor->Visit("variablePointersStorageBuffer",
+                        &features->variablePointersStorageBuffer) &&
+         visitor->Visit("variablePointers", &features->variablePointers);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceProtectedMemoryFeatures* features) {
+  return visitor->Visit("protectedMemory", &features->protectedMemory);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceSamplerYcbcrConversionFeatures* features) {
+  return visitor->Visit("samplerYcbcrConversion",
+                        &features->samplerYcbcrConversion);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkPhysicalDeviceShaderDrawParameterFeatures* features) {
+  return visitor->Visit("shaderDrawParameters",
+                        &features->shaderDrawParameters);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkExternalFenceProperties* properties) {
+  return visitor->Visit("exportFromImportedHandleTypes",
+                        &properties->exportFromImportedHandleTypes) &&
+         visitor->Visit("compatibleHandleTypes",
+                        &properties->compatibleHandleTypes) &&
+         visitor->Visit("externalFenceFeatures",
+                        &properties->externalFenceFeatures);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor,
+                    VkExternalSemaphoreProperties* properties) {
+  return visitor->Visit("exportFromImportedHandleTypes",
+                        &properties->exportFromImportedHandleTypes) &&
+         visitor->Visit("compatibleHandleTypes",
+                        &properties->compatibleHandleTypes) &&
+         visitor->Visit("externalSemaphoreFeatures",
+                        &properties->externalSemaphoreFeatures);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkQueueFamilyProperties* properties) {
+  return
+    visitor->Visit("queueFlags", &properties->queueFlags) &&
+    visitor->Visit("queueCount", &properties->queueCount) &&
+    visitor->Visit("timestampValidBits", &properties->timestampValidBits) &&
+    visitor->Visit("minImageTransferGranularity", &properties->minImageTransferGranularity);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkExtensionProperties* properties) {
+  return
+    visitor->Visit("extensionName", &properties->extensionName) &&
+    visitor->Visit("specVersion", &properties->specVersion);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkLayerProperties* properties) {
+  return
+    visitor->Visit("layerName", &properties->layerName) &&
+    visitor->Visit("specVersion", &properties->specVersion) &&
+    visitor->Visit("implementationVersion", &properties->implementationVersion) &&
+    visitor->Visit("description", &properties->description);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkFormatProperties* properties) {
+  return
+    visitor->Visit("linearTilingFeatures", &properties->linearTilingFeatures) &&
+    visitor->Visit("optimalTilingFeatures", &properties->optimalTilingFeatures) &&
+    visitor->Visit("bufferFeatures", &properties->bufferFeatures);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkJsonLayer* layer) {
+  return visitor->Visit("properties", &layer->properties) &&
+         visitor->Visit("extensions", &layer->extensions);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkJsonDeviceGroup* device_group) {
+  return visitor->Visit("devices", &device_group->device_inds) &&
+         visitor->Visit("subsetAllocation",
+                        &device_group->properties.subsetAllocation);
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkJsonDevice* device) {
+  bool ret = true;
+  switch (device->properties.apiVersion ^
+          VK_VERSION_PATCH(device->properties.apiVersion)) {
+    case VK_API_VERSION_1_1:
+      ret &=
+          visitor->Visit("subgroupProperties", &device->subgroup_properties) &&
+          visitor->Visit("pointClippingProperties",
+                         &device->point_clipping_properties) &&
+          visitor->Visit("multiviewProperties",
+                         &device->multiview_properties) &&
+          visitor->Visit("idProperties", &device->id_properties) &&
+          visitor->Visit("maintenance3Properties",
+                         &device->maintenance3_properties) &&
+          visitor->Visit("16bitStorageFeatures",
+                         &device->bit16_storage_features) &&
+          visitor->Visit("multiviewFeatures", &device->multiview_features) &&
+          visitor->Visit("variablePointerFeatures",
+                         &device->variable_pointer_features) &&
+          visitor->Visit("protectedMemoryFeatures",
+                         &device->protected_memory_features) &&
+          visitor->Visit("samplerYcbcrConversionFeatures",
+                         &device->sampler_ycbcr_conversion_features) &&
+          visitor->Visit("shaderDrawParameterFeatures",
+                         &device->shader_draw_parameter_features) &&
+          visitor->Visit("externalFenceProperties",
+                         &device->external_fence_properties) &&
+          visitor->Visit("externalSemaphoreProperties",
+                         &device->external_semaphore_properties);
+    case VK_API_VERSION_1_0:
+      ret &= visitor->Visit("properties", &device->properties) &&
+             visitor->Visit("features", &device->features) &&
+             visitor->Visit("VK_KHR_variable_pointers",
+                            &device->ext_variable_pointer_features) &&
+             visitor->Visit("memory", &device->memory) &&
+             visitor->Visit("queues", &device->queues) &&
+             visitor->Visit("extensions", &device->extensions) &&
+             visitor->Visit("layers", &device->layers) &&
+             visitor->Visit("formats", &device->formats);
+  }
+  return ret;
+}
+
+template <typename Visitor>
+inline bool Iterate(Visitor* visitor, VkJsonInstance* instance) {
+  bool ret = true;
+  switch (instance->api_version ^ VK_VERSION_PATCH(instance->api_version)) {
+    case VK_API_VERSION_1_1:
+      ret &= visitor->Visit("deviceGroups", &instance->device_groups);
+    case VK_API_VERSION_1_0:
+      ret &= visitor->Visit("layers", &instance->layers) &&
+             visitor->Visit("extensions", &instance->extensions) &&
+             visitor->Visit("devices", &instance->devices);
+  }
+  return ret;
+}
+
+template <typename T>
+using EnableForArithmetic =
+    typename std::enable_if<std::is_arithmetic<T>::value, void>::type;
+
+template <typename T>
+using EnableForStruct =
+    typename std::enable_if<std::is_class<T>::value, void>::type;
+
+template <typename T>
+using EnableForEnum =
+    typename std::enable_if<std::is_enum<T>::value, void>::type;
+
+template <typename T, typename = EnableForStruct<T>, typename = void>
+cJSON* ToJsonValue(const T& value);
+
+template <typename T, typename = EnableForArithmetic<T>>
+inline cJSON* ToJsonValue(const T& value) {
+  return cJSON_CreateNumber(static_cast<double>(value));
+}
+
+inline cJSON* ToJsonValue(const uint64_t& value) {
+  char string[19] = {0};  // "0x" + 16 digits + terminal \0
+  snprintf(string, sizeof(string), "0x%016" PRIx64, value);
+  return cJSON_CreateString(string);
+}
+
+template <typename T, typename = EnableForEnum<T>, typename = void,
+          typename = void>
+inline cJSON* ToJsonValue(const T& value) {
+  return cJSON_CreateNumber(static_cast<double>(value));
+}
+
+template <typename T>
+inline cJSON* ArrayToJsonValue(uint32_t count, const T* values) {
+  cJSON* array = cJSON_CreateArray();
+  for (unsigned int i = 0; i < count; ++i)
+    cJSON_AddItemToArray(array, ToJsonValue(values[i]));
+  return array;
+}
+
+template <typename T, unsigned int N>
+inline cJSON* ToJsonValue(const T (&value)[N]) {
+  return ArrayToJsonValue(N, value);
+}
+
+template <size_t N>
+inline cJSON* ToJsonValue(const char (&value)[N]) {
+  assert(strlen(value) < N);
+  return cJSON_CreateString(value);
+}
+
+template <typename T>
+inline cJSON* ToJsonValue(const std::vector<T>& value) {
+  assert(value.size() <= std::numeric_limits<uint32_t>::max());
+  return ArrayToJsonValue(static_cast<uint32_t>(value.size()), value.data());
+}
+
+template <typename F, typename S>
+inline cJSON* ToJsonValue(const std::pair<F, S>& value) {
+  cJSON* array = cJSON_CreateArray();
+  cJSON_AddItemToArray(array, ToJsonValue(value.first));
+  cJSON_AddItemToArray(array, ToJsonValue(value.second));
+  return array;
+}
+
+template <typename F, typename S>
+inline cJSON* ToJsonValue(const std::map<F, S>& value) {
+  cJSON* array = cJSON_CreateArray();
+  for (auto& kv : value)
+    cJSON_AddItemToArray(array, ToJsonValue(kv));
+  return array;
+}
+
+class JsonWriterVisitor {
+ public:
+  JsonWriterVisitor() : object_(cJSON_CreateObject()) {}
+
+  ~JsonWriterVisitor() {
+    if (object_)
+      cJSON_Delete(object_);
+  }
+
+  template <typename T> bool Visit(const char* key, const T* value) {
+    cJSON_AddItemToObjectCS(object_, key, ToJsonValue(*value));
+    return true;
+  }
+
+  template <typename T, uint32_t N>
+  bool VisitArray(const char* key, uint32_t count, const T (*value)[N]) {
+    assert(count <= N);
+    cJSON_AddItemToObjectCS(object_, key, ArrayToJsonValue(count, *value));
+    return true;
+  }
+
+  cJSON* get_object() const { return object_; }
+  cJSON* take_object() {
+    cJSON* object = object_;
+    object_ = nullptr;
+    return object;
+  }
+
+ private:
+  cJSON* object_;
+};
+
+template <typename Visitor, typename T>
+inline void VisitForWrite(Visitor* visitor, const T& t) {
+  Iterate(visitor, const_cast<T*>(&t));
+}
+
+template <typename T, typename /*= EnableForStruct<T>*/, typename /*= void*/>
+cJSON* ToJsonValue(const T& value) {
+  JsonWriterVisitor visitor;
+  VisitForWrite(&visitor, value);
+  return visitor.take_object();
+}
+
+template <typename T, typename = EnableForStruct<T>>
+bool AsValue(cJSON* json_value, T* t);
+
+inline bool AsValue(cJSON* json_value, int32_t* value) {
+  double d = json_value->valuedouble;
+  if (json_value->type != cJSON_Number || !IsIntegral(d) ||
+      d < static_cast<double>(std::numeric_limits<int32_t>::min()) ||
+      d > static_cast<double>(std::numeric_limits<int32_t>::max()))
+    return false;
+  *value = static_cast<int32_t>(d);
+  return true;
+}
+
+inline bool AsValue(cJSON* json_value, uint64_t* value) {
+  if (json_value->type != cJSON_String)
+    return false;
+  int result = std::sscanf(json_value->valuestring, "0x%016" PRIx64, value);
+  return result == 1;
+}
+
+inline bool AsValue(cJSON* json_value, uint32_t* value) {
+  double d = json_value->valuedouble;
+  if (json_value->type != cJSON_Number || !IsIntegral(d) ||
+      d < 0.0 || d > static_cast<double>(std::numeric_limits<uint32_t>::max()))
+    return false;
+  *value = static_cast<uint32_t>(d);
+  return true;
+}
+
+inline bool AsValue(cJSON* json_value, uint8_t* value) {
+  uint32_t value32 = 0;
+  AsValue(json_value, &value32);
+  if (value32 > std::numeric_limits<uint8_t>::max())
+    return false;
+  *value = static_cast<uint8_t>(value32);
+  return true;
+}
+
+inline bool AsValue(cJSON* json_value, float* value) {
+  if (json_value->type != cJSON_Number)
+    return false;
+  *value = static_cast<float>(json_value->valuedouble);
+  return true;
+}
+
+template <typename T>
+inline bool AsArray(cJSON* json_value, uint32_t count, T* values) {
+  if (json_value->type != cJSON_Array ||
+      cJSON_GetArraySize(json_value) != count)
+    return false;
+  for (uint32_t i = 0; i < count; ++i) {
+    if (!AsValue(cJSON_GetArrayItem(json_value, i), values + i))
+      return false;
+  }
+  return true;
+}
+
+template <typename T, unsigned int N>
+inline bool AsValue(cJSON* json_value, T (*value)[N]) {
+  return AsArray(json_value, N, *value);
+}
+
+template <size_t N>
+inline bool AsValue(cJSON* json_value, char (*value)[N]) {
+  if (json_value->type != cJSON_String)
+    return false;
+  size_t len = strlen(json_value->valuestring);
+  if (len >= N)
+    return false;
+  memcpy(*value, json_value->valuestring, len);
+  memset(*value + len, 0, N-len);
+  return true;
+}
+
+template <typename T, typename = EnableForEnum<T>, typename = void>
+inline bool AsValue(cJSON* json_value, T* t) {
+  uint32_t value = 0;
+  if (!AsValue(json_value, &value))
+      return false;
+  if (!EnumTraits<T>::exist(value)) return false;
+  *t = static_cast<T>(value);
+  return true;
+}
+
+template <typename T>
+inline bool AsValue(cJSON* json_value, std::vector<T>* value) {
+  if (json_value->type != cJSON_Array)
+    return false;
+  int size = cJSON_GetArraySize(json_value);
+  value->resize(size);
+  return AsArray(json_value, size, value->data());
+}
+
+template <typename F, typename S>
+inline bool AsValue(cJSON* json_value, std::pair<F, S>* value) {
+  if (json_value->type != cJSON_Array || cJSON_GetArraySize(json_value) != 2)
+    return false;
+  return AsValue(cJSON_GetArrayItem(json_value, 0), &value->first) &&
+         AsValue(cJSON_GetArrayItem(json_value, 1), &value->second);
+}
+
+template <typename F, typename S>
+inline bool AsValue(cJSON* json_value, std::map<F, S>* value) {
+  if (json_value->type != cJSON_Array)
+    return false;
+  int size = cJSON_GetArraySize(json_value);
+  for (int i = 0; i < size; ++i) {
+    std::pair<F, S> elem;
+    if (!AsValue(cJSON_GetArrayItem(json_value, i), &elem))
+      return false;
+    if (!value->insert(elem).second)
+      return false;
+  }
+  return true;
+}
+
+template <typename T>
+bool ReadValue(cJSON* object, const char* key, T* value,
+               std::string* errors) {
+  cJSON* json_value = cJSON_GetObjectItem(object, key);
+  if (!json_value) {
+    if (errors)
+      *errors = std::string(key) + " missing.";
+    return false;
+  }
+  if (AsValue(json_value, value))
+    return true;
+  if (errors)
+    *errors = std::string("Wrong type for ") + std::string(key) + ".";
+  return false;
+}
+
+template <typename Visitor, typename T>
+inline bool VisitForRead(Visitor* visitor, T* t) {
+  return Iterate(visitor, t);
+}
+
+class JsonReaderVisitor {
+ public:
+  JsonReaderVisitor(cJSON* object, std::string* errors)
+      : object_(object), errors_(errors) {}
+
+  template <typename T> bool Visit(const char* key, T* value) const {
+    return ReadValue(object_, key, value, errors_);
+  }
+
+  template <typename T, uint32_t N>
+  bool VisitArray(const char* key, uint32_t count, T (*value)[N]) {
+    if (count > N)
+      return false;
+    cJSON* json_value = cJSON_GetObjectItem(object_, key);
+    if (!json_value) {
+      if (errors_)
+        *errors_ = std::string(key) + " missing.";
+      return false;
+    }
+    if (AsArray(json_value, count, *value))
+      return true;
+    if (errors_)
+      *errors_ = std::string("Wrong type for ") + std::string(key) + ".";
+    return false;
+  }
+
+
+ private:
+  cJSON* object_;
+  std::string* errors_;
+};
+
+template <typename T, typename /*= EnableForStruct<T>*/>
+bool AsValue(cJSON* json_value, T* t) {
+  if (json_value->type != cJSON_Object)
+    return false;
+  JsonReaderVisitor visitor(json_value, nullptr);
+  return VisitForRead(&visitor, t);
+}
+
+
+template <typename T> std::string VkTypeToJson(const T& t) {
+  JsonWriterVisitor visitor;
+  VisitForWrite(&visitor, t);
+
+  char* output = cJSON_Print(visitor.get_object());
+  std::string result(output);
+  free(output);
+  return result;
+}
+
+template <typename T> bool VkTypeFromJson(const std::string& json,
+                                          T* t,
+                                          std::string* errors) {
+  *t = T();
+  cJSON* object = cJSON_Parse(json.c_str());
+  if (!object) {
+    if (errors)
+      errors->assign(cJSON_GetErrorPtr());
+    return false;
+  }
+  bool result = AsValue(object, t);
+  cJSON_Delete(object);
+  return result;
+}
+
+}  // anonymous namespace
+
+std::string VkJsonInstanceToJson(const VkJsonInstance& instance) {
+  return VkTypeToJson(instance);
+}
+
+bool VkJsonInstanceFromJson(const std::string& json,
+                            VkJsonInstance* instance,
+                            std::string* errors) {
+  return VkTypeFromJson(json, instance, errors);
+}
+
+std::string VkJsonDeviceToJson(const VkJsonDevice& device) {
+  return VkTypeToJson(device);
+}
+
+bool VkJsonDeviceFromJson(const std::string& json,
+                          VkJsonDevice* device,
+                          std::string* errors) {
+  return VkTypeFromJson(json, device, errors);
+};
+
+std::string VkJsonImageFormatPropertiesToJson(
+    const VkImageFormatProperties& properties) {
+  return VkTypeToJson(properties);
+}
+
+bool VkJsonImageFormatPropertiesFromJson(const std::string& json,
+                                         VkImageFormatProperties* properties,
+                                         std::string* errors) {
+  return VkTypeFromJson(json, properties, errors);
+};
diff --git a/vulkan/vkjson/vkjson.h b/vulkan/vkjson/vkjson.h
new file mode 100644
index 0000000..5e8428a
--- /dev/null
+++ b/vulkan/vkjson/vkjson.h
@@ -0,0 +1,162 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2015-2016 The Khronos Group Inc.
+// Copyright (c) 2015-2016 Valve Corporation
+// Copyright (c) 2015-2016 LunarG, Inc.
+// Copyright (c) 2015-2016 Google, 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.
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef VKJSON_H_
+#define VKJSON_H_
+
+#include <vulkan/vulkan.h>
+#include <string.h>
+
+#include <map>
+#include <string>
+#include <vector>
+
+#ifdef WIN32
+#undef min
+#undef max
+#endif
+
+#ifndef VK_API_VERSION_1_0
+#define VK_API_VERSION_1_0 VK_MAKE_VERSION(1, 0, 0)
+#endif
+
+#ifndef VK_API_VERSION_1_1
+#define VK_API_VERSION_1_1 VK_MAKE_VERSION(1, 1, 0)
+#endif
+
+struct VkJsonLayer {
+  VkLayerProperties properties;
+  std::vector<VkExtensionProperties> extensions;
+};
+
+struct VkJsonExtVariablePointerFeatures {
+  VkJsonExtVariablePointerFeatures() {
+    memset(&variable_pointer_features_khr, 0,
+           sizeof(VkPhysicalDeviceVariablePointerFeaturesKHR));
+  }
+  VkPhysicalDeviceVariablePointerFeaturesKHR variable_pointer_features_khr;
+};
+
+struct VkJsonDevice {
+  VkJsonDevice() {
+    memset(&properties, 0, sizeof(VkPhysicalDeviceProperties));
+    memset(&features, 0, sizeof(VkPhysicalDeviceFeatures));
+    memset(&memory, 0, sizeof(VkPhysicalDeviceMemoryProperties));
+    memset(&subgroup_properties, 0, sizeof(VkPhysicalDeviceSubgroupProperties));
+    memset(&point_clipping_properties, 0,
+           sizeof(VkPhysicalDevicePointClippingProperties));
+    memset(&multiview_properties, 0,
+           sizeof(VkPhysicalDeviceMultiviewProperties));
+    memset(&id_properties, 0, sizeof(VkPhysicalDeviceIDProperties));
+    memset(&maintenance3_properties, 0,
+           sizeof(VkPhysicalDeviceMaintenance3Properties));
+    memset(&bit16_storage_features, 0,
+           sizeof(VkPhysicalDevice16BitStorageFeatures));
+    memset(&multiview_features, 0, sizeof(VkPhysicalDeviceMultiviewFeatures));
+    memset(&variable_pointer_features, 0,
+           sizeof(VkPhysicalDeviceVariablePointerFeatures));
+    memset(&protected_memory_features, 0,
+           sizeof(VkPhysicalDeviceProtectedMemoryFeatures));
+    memset(&sampler_ycbcr_conversion_features, 0,
+           sizeof(VkPhysicalDeviceSamplerYcbcrConversionFeatures));
+    memset(&shader_draw_parameter_features, 0,
+           sizeof(VkPhysicalDeviceShaderDrawParameterFeatures));
+  }
+  VkPhysicalDeviceProperties properties;
+  VkPhysicalDeviceFeatures features;
+  VkJsonExtVariablePointerFeatures ext_variable_pointer_features;
+  VkPhysicalDeviceMemoryProperties memory;
+  std::vector<VkQueueFamilyProperties> queues;
+  std::vector<VkExtensionProperties> extensions;
+  std::vector<VkLayerProperties> layers;
+  std::map<VkFormat, VkFormatProperties> formats;
+  VkPhysicalDeviceSubgroupProperties subgroup_properties;
+  VkPhysicalDevicePointClippingProperties point_clipping_properties;
+  VkPhysicalDeviceMultiviewProperties multiview_properties;
+  VkPhysicalDeviceIDProperties id_properties;
+  VkPhysicalDeviceMaintenance3Properties maintenance3_properties;
+  VkPhysicalDevice16BitStorageFeatures bit16_storage_features;
+  VkPhysicalDeviceMultiviewFeatures multiview_features;
+  VkPhysicalDeviceVariablePointerFeatures variable_pointer_features;
+  VkPhysicalDeviceProtectedMemoryFeatures protected_memory_features;
+  VkPhysicalDeviceSamplerYcbcrConversionFeatures
+      sampler_ycbcr_conversion_features;
+  VkPhysicalDeviceShaderDrawParameterFeatures shader_draw_parameter_features;
+  std::map<VkExternalFenceHandleTypeFlagBits, VkExternalFenceProperties>
+      external_fence_properties;
+  std::map<VkExternalSemaphoreHandleTypeFlagBits, VkExternalSemaphoreProperties>
+      external_semaphore_properties;
+};
+
+struct VkJsonDeviceGroup {
+  VkJsonDeviceGroup() {
+    memset(&properties, 0, sizeof(VkPhysicalDeviceGroupProperties));
+  }
+  VkPhysicalDeviceGroupProperties properties;
+  std::vector<uint32_t> device_inds;
+};
+
+struct VkJsonInstance {
+  VkJsonInstance() : api_version(0) {}
+  uint32_t api_version;
+  std::vector<VkJsonLayer> layers;
+  std::vector<VkExtensionProperties> extensions;
+  std::vector<VkJsonDevice> devices;
+  std::vector<VkJsonDeviceGroup> device_groups;
+};
+
+VkJsonInstance VkJsonGetInstance();
+std::string VkJsonInstanceToJson(const VkJsonInstance& instance);
+bool VkJsonInstanceFromJson(const std::string& json,
+                            VkJsonInstance* instance,
+                            std::string* errors);
+
+VkJsonDevice VkJsonGetDevice(VkInstance instance,
+                             VkPhysicalDevice device,
+                             uint32_t instanceExtensionCount,
+                             const char* const* instanceExtensions);
+std::string VkJsonDeviceToJson(const VkJsonDevice& device);
+bool VkJsonDeviceFromJson(const std::string& json,
+                          VkJsonDevice* device,
+                          std::string* errors);
+
+std::string VkJsonImageFormatPropertiesToJson(
+    const VkImageFormatProperties& properties);
+bool VkJsonImageFormatPropertiesFromJson(const std::string& json,
+                                         VkImageFormatProperties* properties,
+                                         std::string* errors);
+
+// Backward-compatibility aliases
+typedef VkJsonDevice VkJsonAllProperties;
+inline VkJsonAllProperties VkJsonGetAllProperties(
+    VkPhysicalDevice physicalDevice) {
+  return VkJsonGetDevice(VK_NULL_HANDLE, physicalDevice, 0, nullptr);
+}
+inline std::string VkJsonAllPropertiesToJson(
+    const VkJsonAllProperties& properties) {
+  return VkJsonDeviceToJson(properties);
+}
+inline bool VkJsonAllPropertiesFromJson(const std::string& json,
+                                        VkJsonAllProperties* properties,
+                                        std::string* errors) {
+  return VkJsonDeviceFromJson(json, properties, errors);
+}
+
+#endif  // VKJSON_H_
diff --git a/vulkan/vkjson/vkjson_info.cc b/vulkan/vkjson/vkjson_info.cc
new file mode 100644
index 0000000..3c4b08b
--- /dev/null
+++ b/vulkan/vkjson/vkjson_info.cc
@@ -0,0 +1,184 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2015-2016 The Khronos Group Inc.
+// Copyright (c) 2015-2016 Valve Corporation
+// Copyright (c) 2015-2016 LunarG, Inc.
+// Copyright (c) 2015-2016 Google, 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.
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef VK_PROTOTYPES
+#define VK_PROTOTYPES
+#endif
+
+#include "vkjson.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <iostream>
+#include <vector>
+
+const uint32_t unsignedNegOne = (uint32_t)(-1);
+
+struct Options {
+  bool instance = false;
+  uint32_t device_index = unsignedNegOne;
+  std::string device_name;
+  std::string output_file;
+};
+
+bool ParseOptions(int argc, char* argv[], Options* options) {
+  for (int i = 1; i < argc; ++i) {
+    std::string arg(argv[i]);
+    if (arg == "--instance" || arg == "-i") {
+      options->instance = true;
+    } else if (arg == "--first" || arg == "-f") {
+      options->device_index = 0;
+    } else {
+      ++i;
+      if (i >= argc) {
+        std::cerr << "Missing parameter after: " << arg << std::endl;
+        return false;
+      }
+      std::string arg2(argv[i]);
+      if (arg == "--device-index" || arg == "-d") {
+        int result = sscanf(arg2.c_str(), "%u", &options->device_index);
+        if (result != 1) {
+          options->device_index = static_cast<uint32_t>(-1);
+          std::cerr << "Unable to parse index: " << arg2 << std::endl;
+          return false;
+        }
+      } else if (arg == "--device-name" || arg == "-n") {
+        options->device_name = arg2;
+      } else if (arg == "--output" || arg == "-o") {
+        options->output_file = arg2;
+      } else {
+        std::cerr << "Unknown argument: " << arg << std::endl;
+        return false;
+      }
+    }
+  }
+  if (options->instance && (options->device_index != unsignedNegOne ||
+                            !options->device_name.empty())) {
+    std::cerr << "Specifying a specific device is incompatible with dumping "
+                 "the whole instance." << std::endl;
+    return false;
+  }
+  if (options->device_index != unsignedNegOne && !options->device_name.empty()) {
+    std::cerr << "Must specify only one of device index and device name."
+              << std::endl;
+    return false;
+  }
+  if (options->instance && options->output_file.empty()) {
+    std::cerr << "Must specify an output file when dumping the whole instance."
+              << std::endl;
+    return false;
+  }
+  if (!options->output_file.empty() && !options->instance &&
+      options->device_index == unsignedNegOne && options->device_name.empty()) {
+    std::cerr << "Must specify instance, device index, or device name when "
+                 "specifying "
+                 "output file." << std::endl;
+    return false;
+  }
+  return true;
+}
+
+bool Dump(const VkJsonInstance& instance, const Options& options) {
+  const VkJsonDevice* out_device = nullptr;
+  if (options.device_index != unsignedNegOne) {
+    if (static_cast<uint32_t>(options.device_index) >=
+        instance.devices.size()) {
+      std::cerr << "Error: device " << options.device_index
+                << " requested but only " << instance.devices.size()
+                << " devices found." << std::endl;
+      return false;
+    }
+    out_device = &instance.devices[options.device_index];
+  } else if (!options.device_name.empty()) {
+    for (const auto& device : instance.devices) {
+      if (device.properties.deviceName == options.device_name) {
+        out_device = &device;
+      }
+    }
+    if (!out_device) {
+      std::cerr << "Error: device '" << options.device_name
+                << "' requested but not found." << std::endl;
+      return false;
+    }
+  }
+
+  std::string output_file;
+  if (options.output_file.empty()) {
+    assert(out_device);
+#if defined(ANDROID)
+    output_file.assign("/sdcard/Android/" + std::string(out_device->properties.deviceName));
+#else
+    output_file.assign(out_device->properties.deviceName);
+#endif
+    output_file.append(".json");
+  } else {
+    output_file = options.output_file;
+  }
+  FILE* file = nullptr;
+  if (output_file == "-") {
+    file = stdout;
+  } else {
+    file = fopen(output_file.c_str(), "w");
+    if (!file) {
+      std::cerr << "Unable to open file " << output_file << "." << std::endl;
+      return false;
+    }
+  }
+
+  std::string json = out_device ? VkJsonDeviceToJson(*out_device)
+                                : VkJsonInstanceToJson(instance);
+  fwrite(json.data(), 1, json.size(), file);
+  fputc('\n', file);
+
+  if (output_file != "-") {
+    fclose(file);
+    std::cout << "Wrote file " << output_file;
+    if (out_device)
+      std::cout << " for device " << out_device->properties.deviceName;
+    std::cout << "." << std::endl;
+  }
+  return true;
+}
+
+int main(int argc, char* argv[]) {
+#if defined(ANDROID)
+  int vulkanSupport = InitVulkan();
+  if (vulkanSupport == 0)
+    return 1;
+#endif
+  Options options;
+  if (!ParseOptions(argc, argv, &options))
+    return 1;
+
+  VkJsonInstance instance = VkJsonGetInstance();
+  if (options.instance || options.device_index != unsignedNegOne ||
+      !options.device_name.empty()) {
+    Dump(instance, options);
+  } else {
+    for (uint32_t i = 0, n = static_cast<uint32_t>(instance.devices.size()); i < n; i++) {
+      options.device_index = i;
+      Dump(instance, options);
+    }
+  }
+
+  return 0;
+}
diff --git a/vulkan/vkjson/vkjson_instance.cc b/vulkan/vkjson/vkjson_instance.cc
new file mode 100644
index 0000000..db0450d
--- /dev/null
+++ b/vulkan/vkjson/vkjson_instance.cc
@@ -0,0 +1,417 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2015-2016 The Khronos Group Inc.
+// Copyright (c) 2015-2016 Valve Corporation
+// Copyright (c) 2015-2016 LunarG, Inc.
+// Copyright (c) 2015-2016 Google, 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.
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef VK_PROTOTYPES
+#define VK_PROTOTYPES
+#endif
+
+#include "vkjson.h"
+
+#include <algorithm>
+#include <utility>
+
+namespace {
+const char* kSupportedInstanceExtensions[] = {
+    "VK_KHR_get_physical_device_properties2"};
+
+bool EnumerateExtensions(const char* layer_name,
+                         std::vector<VkExtensionProperties>* extensions) {
+  VkResult result;
+  uint32_t count = 0;
+  result = vkEnumerateInstanceExtensionProperties(layer_name, &count, nullptr);
+  if (result != VK_SUCCESS)
+    return false;
+  extensions->resize(count);
+  result = vkEnumerateInstanceExtensionProperties(layer_name, &count,
+                                                  extensions->data());
+  if (result != VK_SUCCESS)
+    return false;
+  return true;
+}
+
+bool HasExtension(const char* extension_name,
+                  uint32_t count,
+                  const char* const* extensions) {
+  return std::find_if(extensions, extensions + count,
+                      [extension_name](const char* extension) {
+                        return strcmp(extension, extension_name) == 0;
+                      }) != extensions + count;
+}
+
+bool HasExtension(const char* extension_name,
+                  const std::vector<VkExtensionProperties>& extensions) {
+  return std::find_if(extensions.cbegin(), extensions.cend(),
+                      [extension_name](const VkExtensionProperties& extension) {
+                        return strcmp(extension.extensionName,
+                                      extension_name) == 0;
+                      }) != extensions.cend();
+}
+}  // anonymous namespace
+
+VkJsonDevice VkJsonGetDevice(VkInstance instance,
+                             VkPhysicalDevice physical_device,
+                             uint32_t instance_extension_count,
+                             const char* const* instance_extensions) {
+  VkJsonDevice device;
+
+  PFN_vkGetPhysicalDeviceFeatures2KHR vkpGetPhysicalDeviceFeatures2KHR =
+      nullptr;
+  if (instance != VK_NULL_HANDLE &&
+      HasExtension("VK_KHR_get_physical_device_properties2",
+                   instance_extension_count, instance_extensions)) {
+    vkpGetPhysicalDeviceFeatures2KHR =
+        reinterpret_cast<PFN_vkGetPhysicalDeviceFeatures2KHR>(
+            vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceFeatures2KHR"));
+  }
+
+  uint32_t extension_count = 0;
+  vkEnumerateDeviceExtensionProperties(physical_device, nullptr,
+                                       &extension_count, nullptr);
+  if (extension_count > 0) {
+    device.extensions.resize(extension_count);
+    vkEnumerateDeviceExtensionProperties(
+        physical_device, nullptr, &extension_count, device.extensions.data());
+  }
+
+  uint32_t layer_count = 0;
+  vkEnumerateDeviceLayerProperties(physical_device, &layer_count, nullptr);
+  if (layer_count > 0) {
+    device.layers.resize(layer_count);
+    vkEnumerateDeviceLayerProperties(physical_device, &layer_count,
+                                     device.layers.data());
+  }
+
+  vkGetPhysicalDeviceProperties(physical_device, &device.properties);
+  if (HasExtension("VK_KHR_get_physical_device_properties2",
+                   instance_extension_count, instance_extensions)) {
+    VkPhysicalDeviceFeatures2KHR features = {
+        VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2_KHR,
+        nullptr,
+        {}  // features
+    };
+    if (HasExtension("VK_KHR_variable_pointers", device.extensions)) {
+      device.ext_variable_pointer_features.variable_pointer_features_khr.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTER_FEATURES_KHR;
+      device.ext_variable_pointer_features.variable_pointer_features_khr.pNext =
+          features.pNext;
+      features.pNext =
+          &device.ext_variable_pointer_features.variable_pointer_features_khr;
+    }
+    vkpGetPhysicalDeviceFeatures2KHR(physical_device, &features);
+    device.features = features.features;
+  } else {
+    vkGetPhysicalDeviceFeatures(physical_device, &device.features);
+  }
+  vkGetPhysicalDeviceMemoryProperties(physical_device, &device.memory);
+
+  uint32_t queue_family_count = 0;
+  vkGetPhysicalDeviceQueueFamilyProperties(physical_device, &queue_family_count,
+                                           nullptr);
+  if (queue_family_count > 0) {
+    device.queues.resize(queue_family_count);
+    vkGetPhysicalDeviceQueueFamilyProperties(
+        physical_device, &queue_family_count, device.queues.data());
+  }
+
+  VkFormatProperties format_properties = {};
+  for (VkFormat format = VK_FORMAT_R4G4_UNORM_PACK8;
+       format <= VK_FORMAT_END_RANGE;
+       format = static_cast<VkFormat>(format + 1)) {
+    vkGetPhysicalDeviceFormatProperties(physical_device, format,
+                                        &format_properties);
+    if (format_properties.linearTilingFeatures ||
+        format_properties.optimalTilingFeatures ||
+        format_properties.bufferFeatures) {
+      device.formats.insert(std::make_pair(format, format_properties));
+    }
+  }
+
+  if (device.properties.apiVersion >= VK_API_VERSION_1_1) {
+    for (VkFormat format = VK_FORMAT_G8B8G8R8_422_UNORM;
+         format <= VK_FORMAT_G16_B16_R16_3PLANE_444_UNORM;
+         format = static_cast<VkFormat>(format + 1)) {
+      vkGetPhysicalDeviceFormatProperties(physical_device, format,
+                                          &format_properties);
+      if (format_properties.linearTilingFeatures ||
+          format_properties.optimalTilingFeatures ||
+          format_properties.bufferFeatures) {
+        device.formats.insert(std::make_pair(format, format_properties));
+      }
+    }
+
+    PFN_vkGetPhysicalDeviceProperties2 vkpGetPhysicalDeviceProperties2 =
+        reinterpret_cast<PFN_vkGetPhysicalDeviceProperties2>(
+            vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceProperties2"));
+    if (vkpGetPhysicalDeviceProperties2) {
+      VkPhysicalDeviceProperties2 properties2 = {
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2, nullptr, {}};
+
+      device.subgroup_properties.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_PROPERTIES;
+      device.subgroup_properties.pNext = properties2.pNext;
+      properties2.pNext = &device.subgroup_properties;
+
+      device.point_clipping_properties.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_POINT_CLIPPING_PROPERTIES;
+      device.point_clipping_properties.pNext = properties2.pNext;
+      properties2.pNext = &device.point_clipping_properties;
+
+      device.multiview_properties.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_PROPERTIES;
+      device.multiview_properties.pNext = properties2.pNext;
+      properties2.pNext = &device.multiview_properties;
+
+      device.id_properties.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ID_PROPERTIES;
+      device.id_properties.pNext = properties2.pNext;
+      properties2.pNext = &device.id_properties;
+
+      device.maintenance3_properties.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_3_PROPERTIES;
+      device.maintenance3_properties.pNext = properties2.pNext;
+      properties2.pNext = &device.maintenance3_properties;
+
+      (*vkpGetPhysicalDeviceProperties2)(physical_device, &properties2);
+    }
+
+    PFN_vkGetPhysicalDeviceFeatures2 vkpGetPhysicalDeviceFeatures2 =
+        reinterpret_cast<PFN_vkGetPhysicalDeviceFeatures2>(
+            vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceFeatures2"));
+    if (vkpGetPhysicalDeviceFeatures2) {
+      VkPhysicalDeviceFeatures2 features2 = {
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2, nullptr, {}};
+
+      device.bit16_storage_features.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_16BIT_STORAGE_FEATURES;
+      device.bit16_storage_features.pNext = features2.pNext;
+      features2.pNext = &device.bit16_storage_features;
+
+      device.multiview_features.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_FEATURES;
+      device.multiview_features.pNext = features2.pNext;
+      features2.pNext = &device.multiview_features;
+
+      device.variable_pointer_features.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTER_FEATURES;
+      device.variable_pointer_features.pNext = features2.pNext;
+      features2.pNext = &device.variable_pointer_features;
+
+      device.protected_memory_features.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROTECTED_MEMORY_FEATURES;
+      device.protected_memory_features.pNext = features2.pNext;
+      features2.pNext = &device.protected_memory_features;
+
+      device.sampler_ycbcr_conversion_features.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLER_YCBCR_CONVERSION_FEATURES;
+      device.sampler_ycbcr_conversion_features.pNext = features2.pNext;
+      features2.pNext = &device.sampler_ycbcr_conversion_features;
+
+      device.shader_draw_parameter_features.sType =
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DRAW_PARAMETER_FEATURES;
+      device.shader_draw_parameter_features.pNext = features2.pNext;
+      features2.pNext = &device.shader_draw_parameter_features;
+
+      (*vkpGetPhysicalDeviceFeatures2)(physical_device, &features2);
+    }
+
+    PFN_vkGetPhysicalDeviceExternalFenceProperties
+        vkpGetPhysicalDeviceExternalFenceProperties =
+            reinterpret_cast<PFN_vkGetPhysicalDeviceExternalFenceProperties>(
+                vkGetInstanceProcAddr(
+                    instance, "vkGetPhysicalDeviceExternalFenceProperties"));
+    if (vkpGetPhysicalDeviceExternalFenceProperties) {
+      VkPhysicalDeviceExternalFenceInfo external_fence_info = {
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_FENCE_INFO, nullptr,
+          VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_FD_BIT};
+      VkExternalFenceProperties external_fence_properties = {};
+
+      for (VkExternalFenceHandleTypeFlagBits handle_type =
+               VK_EXTERNAL_FENCE_HANDLE_TYPE_OPAQUE_FD_BIT;
+           handle_type <= VK_EXTERNAL_FENCE_HANDLE_TYPE_SYNC_FD_BIT;
+           handle_type = static_cast<VkExternalFenceHandleTypeFlagBits>(
+               handle_type << 1)) {
+        external_fence_info.handleType = handle_type;
+        (*vkpGetPhysicalDeviceExternalFenceProperties)(
+            physical_device, &external_fence_info, &external_fence_properties);
+        if (external_fence_properties.exportFromImportedHandleTypes ||
+            external_fence_properties.compatibleHandleTypes ||
+            external_fence_properties.externalFenceFeatures) {
+          device.external_fence_properties.insert(
+              std::make_pair(handle_type, external_fence_properties));
+        }
+      }
+    }
+
+    PFN_vkGetPhysicalDeviceExternalSemaphoreProperties
+        vkpGetPhysicalDeviceExternalSemaphoreProperties = reinterpret_cast<
+            PFN_vkGetPhysicalDeviceExternalSemaphoreProperties>(
+            vkGetInstanceProcAddr(
+                instance, "vkGetPhysicalDeviceExternalSemaphoreProperties"));
+    if (vkpGetPhysicalDeviceExternalSemaphoreProperties) {
+      VkPhysicalDeviceExternalSemaphoreInfo external_semaphore_info = {
+          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_SEMAPHORE_INFO, nullptr,
+          VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT};
+      VkExternalSemaphoreProperties external_semaphore_properties = {};
+
+      for (VkExternalSemaphoreHandleTypeFlagBits handle_type =
+               VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT;
+           handle_type <= VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT;
+           handle_type = static_cast<VkExternalSemaphoreHandleTypeFlagBits>(
+               handle_type << 1)) {
+        external_semaphore_info.handleType = handle_type;
+        (*vkpGetPhysicalDeviceExternalSemaphoreProperties)(
+            physical_device, &external_semaphore_info,
+            &external_semaphore_properties);
+        if (external_semaphore_properties.exportFromImportedHandleTypes ||
+            external_semaphore_properties.compatibleHandleTypes ||
+            external_semaphore_properties.externalSemaphoreFeatures) {
+          device.external_semaphore_properties.insert(
+              std::make_pair(handle_type, external_semaphore_properties));
+        }
+      }
+    }
+  }
+
+  return device;
+}
+
+VkJsonInstance VkJsonGetInstance() {
+  VkJsonInstance instance;
+  VkResult result;
+  uint32_t count;
+
+  count = 0;
+  result = vkEnumerateInstanceLayerProperties(&count, nullptr);
+  if (result != VK_SUCCESS)
+    return VkJsonInstance();
+  if (count > 0) {
+    std::vector<VkLayerProperties> layers(count);
+    result = vkEnumerateInstanceLayerProperties(&count, layers.data());
+    if (result != VK_SUCCESS)
+      return VkJsonInstance();
+    instance.layers.reserve(count);
+    for (auto& layer : layers) {
+      instance.layers.push_back(VkJsonLayer{layer, std::vector<VkExtensionProperties>()});
+      if (!EnumerateExtensions(layer.layerName,
+                               &instance.layers.back().extensions))
+        return VkJsonInstance();
+    }
+  }
+
+  if (!EnumerateExtensions(nullptr, &instance.extensions))
+    return VkJsonInstance();
+
+  std::vector<const char*> instance_extensions;
+  for (const auto extension : kSupportedInstanceExtensions) {
+    if (HasExtension(extension, instance.extensions))
+      instance_extensions.push_back(extension);
+  }
+
+  const VkApplicationInfo app_info = {VK_STRUCTURE_TYPE_APPLICATION_INFO,
+                                      nullptr,
+                                      "vkjson_info",
+                                      1,
+                                      "",
+                                      0,
+                                      VK_API_VERSION_1_0};
+  VkInstanceCreateInfo instance_info = {
+      VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
+      nullptr,
+      0,
+      &app_info,
+      0,
+      nullptr,
+      static_cast<uint32_t>(instance_extensions.size()),
+      instance_extensions.data()};
+  VkInstance vkinstance;
+  result = vkCreateInstance(&instance_info, nullptr, &vkinstance);
+  if (result != VK_SUCCESS)
+    return VkJsonInstance();
+
+  count = 0;
+  result = vkEnumeratePhysicalDevices(vkinstance, &count, nullptr);
+  if (result != VK_SUCCESS) {
+    vkDestroyInstance(vkinstance, nullptr);
+    return VkJsonInstance();
+  }
+
+  std::vector<VkPhysicalDevice> devices(count, VK_NULL_HANDLE);
+  result = vkEnumeratePhysicalDevices(vkinstance, &count, devices.data());
+  if (result != VK_SUCCESS) {
+    vkDestroyInstance(vkinstance, nullptr);
+    return VkJsonInstance();
+  }
+
+  std::map<VkPhysicalDevice, uint32_t> device_map;
+  const uint32_t sz = devices.size();
+  instance.devices.reserve(sz);
+  for (uint32_t i = 0; i < sz; ++i) {
+    device_map.insert(std::make_pair(devices[i], i));
+    instance.devices.emplace_back(VkJsonGetDevice(vkinstance, devices[i],
+                                                  instance_extensions.size(),
+                                                  instance_extensions.data()));
+  }
+
+  PFN_vkEnumerateInstanceVersion vkpEnumerateInstanceVersion =
+      reinterpret_cast<PFN_vkEnumerateInstanceVersion>(
+          vkGetInstanceProcAddr(nullptr, "vkEnumerateInstanceVersion"));
+  if (!vkpEnumerateInstanceVersion) {
+    instance.api_version = VK_API_VERSION_1_0;
+  } else {
+    result = (*vkpEnumerateInstanceVersion)(&instance.api_version);
+    if (result != VK_SUCCESS) {
+      vkDestroyInstance(vkinstance, nullptr);
+      return VkJsonInstance();
+    }
+  }
+
+  PFN_vkEnumeratePhysicalDeviceGroups vkpEnumeratePhysicalDeviceGroups =
+      reinterpret_cast<PFN_vkEnumeratePhysicalDeviceGroups>(
+          vkGetInstanceProcAddr(vkinstance, "vkEnumeratePhysicalDeviceGroups"));
+  if (vkpEnumeratePhysicalDeviceGroups) {
+    count = 0;
+    result = (*vkpEnumeratePhysicalDeviceGroups)(vkinstance, &count, nullptr);
+    if (result != VK_SUCCESS) {
+      vkDestroyInstance(vkinstance, nullptr);
+      return VkJsonInstance();
+    }
+
+    VkJsonDeviceGroup device_group;
+    std::vector<VkPhysicalDeviceGroupProperties> group_properties;
+    group_properties.resize(count);
+    result = (*vkpEnumeratePhysicalDeviceGroups)(vkinstance, &count,
+                                                 group_properties.data());
+    if (result != VK_SUCCESS) {
+      vkDestroyInstance(vkinstance, nullptr);
+      return VkJsonInstance();
+    }
+    for (auto properties : group_properties) {
+      device_group.properties = properties;
+      for (uint32_t i = 0; i < properties.physicalDeviceCount; ++i) {
+        device_group.device_inds.push_back(
+            device_map[properties.physicalDevices[i]]);
+      }
+      instance.device_groups.push_back(device_group);
+    }
+  }
+
+  vkDestroyInstance(vkinstance, nullptr);
+  return instance;
+}
diff --git a/vulkan/vkjson/vkjson_unittest.cc b/vulkan/vkjson/vkjson_unittest.cc
new file mode 100644
index 0000000..de765cd
--- /dev/null
+++ b/vulkan/vkjson/vkjson_unittest.cc
@@ -0,0 +1,101 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2015-2016 The Khronos Group Inc.
+// Copyright (c) 2015-2016 Valve Corporation
+// Copyright (c) 2015-2016 LunarG, Inc.
+// Copyright (c) 2015-2016 Google, 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.
+///////////////////////////////////////////////////////////////////////////////
+
+#include "vkjson.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <iostream>
+
+#define EXPECT(X) if (!(X)) \
+  ReportFailure(__FILE__, __LINE__, #X);
+
+#define ASSERT(X) if (!(X)) { \
+  ReportFailure(__FILE__, __LINE__, #X); \
+  return 2; \
+}
+
+int g_failures;
+
+void ReportFailure(const char* file, int line, const char* assertion) {
+  std::cout << file << ":" << line << ": \"" << assertion << "\" failed."
+            << std::endl;
+  ++g_failures;
+}
+
+int main(int argc, char* argv[]) {
+  std::string errors;
+  bool result = false;
+
+  VkJsonInstance instance;
+  instance.devices.resize(1);
+  VkJsonDevice& device = instance.devices[0];
+
+  const char name[] = "Test device";
+  memcpy(device.properties.deviceName, name, sizeof(name));
+  device.properties.limits.maxImageDimension1D = 3;
+  device.properties.limits.maxSamplerLodBias = 3.5f;
+  device.properties.limits.bufferImageGranularity = 0x1ffffffffull;
+  device.properties.limits.maxViewportDimensions[0] = 1;
+  device.properties.limits.maxViewportDimensions[1] = 2;
+  VkFormatProperties format_props = {
+      VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT | VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT,
+      VK_FORMAT_FEATURE_VERTEX_BUFFER_BIT,
+      VK_FORMAT_FEATURE_BLIT_SRC_BIT | VK_FORMAT_FEATURE_BLIT_DST_BIT};
+  device.formats.insert(std::make_pair(VK_FORMAT_R8_UNORM, format_props));
+  device.formats.insert(std::make_pair(VK_FORMAT_R8G8_UNORM, format_props));
+
+  std::string json = VkJsonInstanceToJson(instance);
+  std::cout << json << std::endl;
+
+  VkJsonInstance instance2;
+  result = VkJsonInstanceFromJson(json, &instance2, &errors);
+  EXPECT(result);
+  if (!result)
+    std::cout << "Error: " << errors << std::endl;
+  const VkJsonDevice& device2 = instance2.devices.at(0);
+
+  EXPECT(!memcmp(&device.properties, &device2.properties,
+                 sizeof(device.properties)));
+  for (auto& kv : device.formats) {
+    auto it = device2.formats.find(kv.first);
+    EXPECT(it != device2.formats.end());
+    EXPECT(!memcmp(&kv.second, &it->second, sizeof(kv.second)));
+  }
+
+  VkImageFormatProperties props = {};
+  json = VkJsonImageFormatPropertiesToJson(props);
+  VkImageFormatProperties props2 = {};
+  result = VkJsonImageFormatPropertiesFromJson(json, &props2, &errors);
+  EXPECT(result);
+  if (!result)
+    std::cout << "Error: " << errors << std::endl;
+
+  EXPECT(!memcmp(&props, &props2, sizeof(props)));
+
+  if (g_failures) {
+    std::cout << g_failures << " failures." << std::endl;
+    return 1;
+  } else {
+    std::cout << "Success." << std::endl;
+    return 0;
+  }
+}