vulkan/libvulkan/code-generator.tmpl

{{define "Copyright"}}
/*
* Copyright 2016 The Android Open Source Project
*
* 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.
*/
{{end}}

{{Include "../api/templates/vulkan_common.tmpl"}}
{{Global "clang-format" (Strings "clang-format" "-style=file")}}
{{Macro "DefineGlobals" $}}
{{$ | Macro "api_gen.h"   | Format (Global "clang-format") | Write "api_gen.h"  }}
{{$ | Macro "api_gen.cpp" | Format (Global "clang-format") | Write "api_gen.cpp"}}
{{$ | Macro "driver_gen.h" | Format (Global "clang-format") | Write "driver_gen.h"}}
{{$ | Macro "driver_gen.cpp" | Format (Global "clang-format") | Write "driver_gen.cpp"}}

{{/*
-------------------------------------------------------------------------------
  api_gen.h
-------------------------------------------------------------------------------
*/}}
{{define "api_gen.h"}}
{{Macro "Copyright"}}

// WARNING: This file is generated. See ../README.md for instructions.

#ifndef LIBVULKAN_API_GEN_H
#define LIBVULKAN_API_GEN_H

#include <bitset>
#include <vulkan/vulkan.h>
#include "driver_gen.h"

namespace vulkan {
namespace api {

struct InstanceDispatchTable {
  // clang-format off
  {{range $f := AllCommands $}}
    {{if (Macro "api.IsInstanceDispatchTableEntry" $f)}}
      {{Macro "C++.DeclareTableEntry" $f}};
    {{end}}
  {{end}}
  // clang-format on
};

struct DeviceDispatchTable {
  // clang-format off
  {{range $f := AllCommands $}}
    {{if (Macro "api.IsDeviceDispatchTableEntry" $f)}}
      {{Macro "C++.DeclareTableEntry" $f}};
    {{end}}
  {{end}}
  // clang-format on
};

bool InitDispatchTable(
    VkInstance instance,
    PFN_vkGetInstanceProcAddr get_proc,
    const std::bitset<driver::ProcHook::EXTENSION_COUNT> &extensions);
bool InitDispatchTable(
    VkDevice dev,
    PFN_vkGetDeviceProcAddr get_proc,
    const std::bitset<driver::ProcHook::EXTENSION_COUNT> &extensions);

} // namespace api
} // namespace vulkan

#endif // LIBVULKAN_API_GEN_H
{{end}}


{{/*
-------------------------------------------------------------------------------
  api_gen.cpp
-------------------------------------------------------------------------------
*/}}
{{define "api_gen.cpp"}}
{{Macro "Copyright"}}

// WARNING: This file is generated. See ../README.md for instructions.

#include <string.h>
#include <algorithm>
#include <log/log.h>

// to catch mismatches between vulkan.h and this file
#undef VK_NO_PROTOTYPES
#include "api.h"

namespace vulkan {
namespace api {

{{Macro "C++.DefineInitProcMacro" "dispatch"}}

{{Macro "api.C++.DefineInitProcExtMacro"}}

namespace {

// clang-format off

{{range $f := AllCommands $}}
  {{Macro "api.C++.DefineExtensionStub" $f}}
{{end}}
// clang-format on

} // anonymous

bool InitDispatchTable(
    VkInstance instance,
    PFN_vkGetInstanceProcAddr get_proc,
    const std::bitset<driver::ProcHook::EXTENSION_COUNT> &extensions) {
    auto& data = GetData(instance);
    bool success = true;

    // clang-format off
    {{range $f := AllCommands $}}
      {{if (Macro "api.IsInstanceDispatchTableEntry" $f)}}
        {{Macro "C++.InitProc" $f}}
      {{end}}
    {{end}}
    // clang-format on

    return success;
}

bool InitDispatchTable(
    VkDevice dev,
    PFN_vkGetDeviceProcAddr get_proc,
    const std::bitset<driver::ProcHook::EXTENSION_COUNT> &extensions) {
    auto& data = GetData(dev);
    bool success = true;

    // clang-format off
    {{range $f := AllCommands $}}
      {{if (Macro "api.IsDeviceDispatchTableEntry" $f)}}
        {{Macro "C++.InitProc" $f}}
      {{end}}
    {{end}}
    // clang-format on

    return success;
}

// clang-format off

namespace {

// forward declarations needed by GetInstanceProcAddr and GetDeviceProcAddr
{{range $f := AllCommands $}}
  {{if and (Macro "IsFunctionExported" $f) (not (Macro "api.IsIntercepted" $f))}}
    VKAPI_ATTR {{Node "Type" $f.Return}} {{Macro "BaseName" $f}}({{Macro "Parameters" $f}});
  {{end}}
{{end}}

{{range $f := AllCommands $}}
  {{if and (Macro "IsFunctionExported" $f) (not (Macro "api.IsIntercepted" $f))}}
    VKAPI_ATTR {{Node "Type" $f.Return}} {{Macro "BaseName" $f}}({{Macro "Parameters" $f}}) {
      {{     if eq $f.Name "vkGetInstanceProcAddr"}}
        {{Macro "api.C++.InterceptInstanceProcAddr" $}}
      {{else if eq $f.Name "vkGetDeviceProcAddr"}}
        {{Macro "api.C++.InterceptDeviceProcAddr" $}}
      {{end}}

      {{Macro "api.C++.Dispatch" $f}}
    }

  {{end}}
{{end}}

}  // anonymous namespace

// clang-format on

} // namespace api
} // namespace vulkan

// clang-format off

{{range $f := AllCommands $}}
  {{if (Macro "IsFunctionExported" $f)}}
    __attribute__((visibility("default")))
    VKAPI_ATTR {{Node "Type" $f.Return}} {{$f.Name}}({{Macro "Parameters" $f}}) {
      {{if not (IsVoid $f.Return.Type)}}return {{end}}
      vulkan::api::{{Macro "BaseName" $f}}({{Macro "Arguments" $f}});
    }

  {{end}}
{{end}}

// clang-format on
{{end}}


{{/*
-------------------------------------------------------------------------------
  driver_gen.h
-------------------------------------------------------------------------------
*/}}
{{define "driver_gen.h"}}
{{Macro "Copyright"}}

// WARNING: This file is generated. See ../README.md for instructions.

#ifndef LIBVULKAN_DRIVER_GEN_H
#define LIBVULKAN_DRIVER_GEN_H

#include <bitset>
#include <vulkan/vulkan.h>
#include <vulkan/vk_android_native_buffer.h>

namespace vulkan {
namespace driver {

{{Macro "driver.C++.DefineProcHookType"}}

struct InstanceDriverTable {
  // clang-format off
  {{range $f := AllCommands $}}
    {{if (Macro "driver.IsInstanceDriverTableEntry" $f)}}
      {{Macro "C++.DeclareTableEntry" $f}};
    {{end}}
  {{end}}
  // clang-format on
};

struct DeviceDriverTable {
  // clang-format off
  {{range $f := AllCommands $}}
    {{if (Macro "driver.IsDeviceDriverTableEntry" $f)}}
      {{Macro "C++.DeclareTableEntry" $f}};
    {{end}}
  {{end}}
  // clang-format on
};

const ProcHook* GetProcHook(const char* name);
ProcHook::Extension GetProcHookExtension(const char* name);

bool InitDriverTable(VkInstance instance, PFN_vkGetInstanceProcAddr get_proc,
                     const std::bitset<ProcHook::EXTENSION_COUNT> &extensions);
bool InitDriverTable(VkDevice dev, PFN_vkGetDeviceProcAddr get_proc,
                     const std::bitset<ProcHook::EXTENSION_COUNT> &extensions);

} // namespace driver
} // namespace vulkan

#endif // LIBVULKAN_DRIVER_TABLE_H
{{end}}


{{/*
-------------------------------------------------------------------------------
  driver_gen.cpp
-------------------------------------------------------------------------------
*/}}
{{define "driver_gen.cpp"}}
{{Macro "Copyright"}}

// WARNING: This file is generated. See ../README.md for instructions.

#include <string.h>
#include <algorithm>
#include <log/log.h>

#include "driver.h"

namespace vulkan {
namespace driver {

namespace {

// clang-format off

{{range $f := AllCommands $}}
  {{Macro "driver.C++.DefineProcHookStub" $f}}
{{end}}
// clang-format on

const ProcHook g_proc_hooks[] = {
  // clang-format off
  {{range $f := SortBy (AllCommands $) "FunctionName"}}
    {{if (Macro "driver.IsIntercepted" $f)}}
      {{     if (Macro "IsGloballyDispatched" $f)}}
        {{Macro "driver.C++.DefineGlobalProcHook" $f}}
      {{else if (Macro "IsInstanceDispatched" $f)}}
        {{Macro "driver.C++.DefineInstanceProcHook" $f}}
      {{else if (Macro "IsDeviceDispatched" $f)}}
        {{Macro "driver.C++.DefineDeviceProcHook" $f}}
      {{end}}
    {{end}}
  {{end}}
  // clang-format on
};

} // anonymous

const ProcHook* GetProcHook(const char* name) {
    const auto& begin = g_proc_hooks;
    const auto& end = g_proc_hooks +
      sizeof(g_proc_hooks) / sizeof(g_proc_hooks[0]);
    const auto hook = std::lower_bound(begin, end, name,
        [](const ProcHook& e, const char* n) { return strcmp(e.name, n) < 0; });
    return (hook <  end && strcmp(hook->name, name) == 0) ? hook : nullptr;
}

ProcHook::Extension GetProcHookExtension(const char* name) {
  {{$exts := Strings (Macro "driver.InterceptedExtensions") | SplitOn "\n"}}
  // clang-format off
  {{range $e := $exts}}
    if (strcmp(name, "{{$e}}") == 0) return ProcHook::{{TrimPrefix "VK_" $e}};
  {{end}}
  // clang-format on
  return ProcHook::EXTENSION_UNKNOWN;
}

{{Macro "C++.DefineInitProcMacro" "driver"}}

{{Macro "driver.C++.DefineInitProcExtMacro"}}

bool InitDriverTable(VkInstance instance, PFN_vkGetInstanceProcAddr get_proc,
                     const std::bitset<ProcHook::EXTENSION_COUNT> &extensions)
{
    auto& data = GetData(instance);
    bool success = true;

    // clang-format off
    {{range $f := AllCommands $}}
      {{if (Macro "driver.IsInstanceDriverTableEntry" $f)}}
        {{Macro "C++.InitProc" $f}}
      {{end}}
    {{end}}
    // clang-format on

    return success;
}

bool InitDriverTable(VkDevice dev, PFN_vkGetDeviceProcAddr get_proc,
                     const std::bitset<ProcHook::EXTENSION_COUNT> &extensions)
{
    auto& data = GetData(dev);
    bool success = true;

    // clang-format off
    {{range $f := AllCommands $}}
      {{if (Macro "driver.IsDeviceDriverTableEntry" $f)}}
        {{Macro "C++.InitProc" $f}}
      {{end}}
    {{end}}
    // clang-format on

    return success;
}

} // namespace driver
} // namespace vulkan

// clang-format on
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits a declaration of a dispatch/driver table entry.
------------------------------------------------------------------------------
*/}}
{{define "C++.DeclareTableEntry"}}
  {{AssertType $ "Function"}}

  {{Macro "FunctionPtrName" $}} {{Macro "BaseName" $}}
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits INIT_PROC macro.
-------------------------------------------------------------------------------
*/}}
{{define "C++.DefineInitProcMacro"}}
  #define UNLIKELY(expr) __builtin_expect((expr), 0)

  #define INIT_PROC(obj, proc) do {                             \
      data.{{$}}.proc = reinterpret_cast<PFN_vk ## proc>(       \
              get_proc(obj, "vk" # proc));                      \
      if (UNLIKELY(!data.{{$}}.proc)) {                         \
          ALOGE("missing " # obj " proc: vk" # proc);           \
          success = false;                                      \
      }                                                         \
  } while(0)
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits code to invoke INIT_PROC or INIT_PROC_EXT.
-------------------------------------------------------------------------------
*/}}
{{define "C++.InitProc"}}
  {{AssertType $ "Function"}}

  {{$ext := GetAnnotation $ "extension"}}
  {{if $ext}}
    INIT_PROC_EXT({{Macro "BaseName" $ext}},
  {{else}}
    INIT_PROC(
  {{end}}

  {{if (Macro "IsInstanceDispatched" $)}}
    instance,
  {{else}}
    dev,
  {{end}}

  {{Macro "BaseName" $}});
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if a function is exported and instance-dispatched.
------------------------------------------------------------------------------
*/}}
{{define "api.IsInstanceDispatchTableEntry"}}
  {{AssertType $ "Function"}}

  {{if and (Macro "IsFunctionExported" $) (Macro "IsInstanceDispatched" $)}}
    {{/* deprecated and unused internally */}}
    {{if not (eq $.Name "vkEnumerateDeviceLayerProperties")}}
      true
    {{end}}
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if a function is exported and device-dispatched.
------------------------------------------------------------------------------
*/}}
{{define "api.IsDeviceDispatchTableEntry"}}
  {{AssertType $ "Function"}}

  {{if and (Macro "IsFunctionExported" $) (Macro "IsDeviceDispatched" $)}}
    true
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if a function is intercepted by vulkan::api.
------------------------------------------------------------------------------
*/}}
{{define "api.IsIntercepted"}}
  {{AssertType $ "Function"}}

  {{if (Macro "IsFunctionSupported" $)}}
    {{/* Global functions cannot be dispatched at all */}}
    {{     if (Macro "IsGloballyDispatched" $)}}true

    {{/* VkPhysicalDevice functions that manage device layers */}}
    {{else if eq $.Name "vkCreateDevice"}}true
    {{else if eq $.Name "vkEnumerateDeviceLayerProperties"}}true
    {{else if eq $.Name "vkEnumerateDeviceExtensionProperties"}}true

    {{/* Destroy functions of dispatchable objects */}}
    {{else if eq $.Name "vkDestroyInstance"}}true
    {{else if eq $.Name "vkDestroyDevice"}}true

    {{end}}
  {{end}}
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits INIT_PROC_EXT macro for vulkan::api.
-------------------------------------------------------------------------------
*/}}
{{define "api.C++.DefineInitProcExtMacro"}}
  // Exported extension functions may be invoked even when their extensions
  // are disabled.  Dispatch to stubs when that happens.
  #define INIT_PROC_EXT(ext, obj, proc) do {                    \
      if (extensions[driver::ProcHook::ext])                    \
        INIT_PROC(obj, proc);                                   \
      else                                                      \
        data.dispatch.proc = disabled ## proc;                  \
  } while(0)
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits a stub for an exported extension function.
-------------------------------------------------------------------------------
*/}}
{{define "api.C++.DefineExtensionStub"}}
  {{AssertType $ "Function"}}

  {{$ext := GetAnnotation $ "extension"}}
  {{if and $ext (Macro "IsFunctionExported" $)}}
    {{$ext_name := index $ext.Arguments 0}}

    {{$base := (Macro "BaseName" $)}}

    {{$p0 := (index $.CallParameters 0)}}
    {{$ptail := (Tail 1 $.CallParameters)}}

    {{$first_type := (Macro "Parameter" $p0)}}
    {{$tail_types := (ForEach $ptail "ParameterType" | JoinWith ", ")}}

    VKAPI_ATTR {{Node "Type" $.Return}} disabled{{$base}}({{$first_type}}, {{$tail_types}}) {
      driver::Logger({{$p0.Name}}).Err({{$p0.Name}},
        "{{$ext_name}} not enabled. Exported {{$.Name}} not executed.");
      {{if not (IsVoid $.Return.Type)}}return VK_SUCCESS;{{end}}
    }

  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits code for vkGetInstanceProcAddr for function interception.
------------------------------------------------------------------------------
*/}}
{{define "api.C++.InterceptInstanceProcAddr"}}
  {{AssertType $ "API"}}

  // global functions
  if (instance == VK_NULL_HANDLE) {
    {{range $f := AllCommands $}}
      {{if (Macro "IsGloballyDispatched" $f)}}
        if (strcmp(pName, "{{$f.Name}}") == 0) return
          reinterpret_cast<PFN_vkVoidFunction>({{Macro "BaseName" $f}});
      {{end}}
    {{end}}

    ALOGE("invalid vkGetInstanceProcAddr(VK_NULL_HANDLE, \"%s\") call", pName);
    return nullptr;
  }

  static const struct Hook {
    const char* name;
    PFN_vkVoidFunction proc;
  } hooks[] = {
    {{range $f := SortBy (AllCommands $) "FunctionName"}}
      {{if (Macro "IsFunctionExported" $f)}}
        {{/* hide global functions */}}
        {{if (Macro "IsGloballyDispatched" $f)}}
          { "{{$f.Name}}", nullptr },

        {{/* redirect intercepted functions */}}
        {{else if (Macro "api.IsIntercepted" $f)}}
          { "{{$f.Name}}", reinterpret_cast<PFN_vkVoidFunction>(
            {{Macro "BaseName" $f}}) },

        {{/* redirect vkGetInstanceProcAddr to itself */}}
        {{else if eq $f.Name "vkGetInstanceProcAddr"}}
          { "{{$f.Name}}", reinterpret_cast<PFN_vkVoidFunction>({{Macro "BaseName" $f}}) },

        {{/* redirect device functions to themselves as a workaround for
             layers that do not intercept in their vkGetInstanceProcAddr */}}
        {{else if (Macro "IsDeviceDispatched" $f)}}
          { "{{$f.Name}}", reinterpret_cast<PFN_vkVoidFunction>({{Macro "BaseName" $f}}) },

        {{end}}
      {{end}}
    {{end}}
  };
  // clang-format on
  constexpr size_t count = sizeof(hooks) / sizeof(hooks[0]);
  auto hook = std::lower_bound(
    hooks, hooks + count, pName,
    [](const Hook& h, const char* n) { return strcmp(h.name, n) < 0; });
  if (hook <  hooks + count && strcmp(hook->name, pName) == 0) {
    if (!hook->proc) {
      vulkan::driver::Logger(instance).Err(
        instance, "invalid vkGetInstanceProcAddr(%p, \"%s\") call",
        instance, pName);
    }
    return hook->proc;
  }
  // clang-format off

{{end}}


{{/*
------------------------------------------------------------------------------
  Emits code for vkGetDeviceProcAddr for function interception.
------------------------------------------------------------------------------
*/}}
{{define "api.C++.InterceptDeviceProcAddr"}}
  {{AssertType $ "API"}}

  if (device == VK_NULL_HANDLE) {
    ALOGE("invalid vkGetDeviceProcAddr(VK_NULL_HANDLE, ...) call");
    return nullptr;
  }

  static const char* const known_non_device_names[] = {
    {{range $f := SortBy (AllCommands $) "FunctionName"}}
      {{if (Macro "IsFunctionSupported" $f)}}
        {{if not (Macro "IsDeviceDispatched" $f)}}
          "{{$f.Name}}",
        {{end}}
      {{end}}
    {{end}}
  };
  // clang-format on
  constexpr size_t count = sizeof(known_non_device_names) /
    sizeof(known_non_device_names[0]);
  if (!pName ||
      std::binary_search(
        known_non_device_names, known_non_device_names + count, pName,
        [](const char* a, const char* b) { return (strcmp(a, b) < 0); })) {
    vulkan::driver::Logger(device).Err(
      device, "invalid vkGetDeviceProcAddr(%p, \"%s\") call", device,
      (pName) ? pName : "(null)");
    return nullptr;
  }
  // clang-format off

  {{range $f := AllCommands $}}
    {{if (Macro "IsDeviceDispatched" $f)}}
      {{     if (Macro "api.IsIntercepted" $f)}}
        if (strcmp(pName, "{{$f.Name}}") == 0) return
          reinterpret_cast<PFN_vkVoidFunction>(
            {{Macro "BaseName" $f}});
      {{else if eq $f.Name "vkGetDeviceProcAddr"}}
        if (strcmp(pName, "{{$f.Name}}") == 0) return
          reinterpret_cast<PFN_vkVoidFunction>(
            {{Macro "BaseName" $f}});
      {{end}}
    {{end}}
  {{end}}

{{end}}


{{/*
------------------------------------------------------------------------------
  Emits code to dispatch a function.
------------------------------------------------------------------------------
*/}}
{{define "api.C++.Dispatch"}}
  {{AssertType $ "Function"}}
  {{if (Macro "api.IsIntercepted" $)}}
    {{Error "$.Name should not be generated"}}
  {{end}}

  {{if not (IsVoid $.Return.Type)}}return {{end}}

  {{$p0 := index $.CallParameters 0}}
  GetData({{$p0.Name}}).dispatch.
  {{Macro "BaseName" $}}({{Macro "Arguments" $}});
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits a list of extensions intercepted by vulkan::driver.
------------------------------------------------------------------------------
*/}}
{{define "driver.InterceptedExtensions"}}
VK_ANDROID_native_buffer
VK_EXT_debug_report
VK_KHR_android_surface
VK_KHR_surface
VK_KHR_swapchain
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if an extension is intercepted by vulkan::driver.
------------------------------------------------------------------------------
*/}}
{{define "driver.IsExtensionIntercepted"}}
  {{$ext_name := index $.Arguments 0}}
  {{$filters := Strings (Macro "driver.InterceptedExtensions") | SplitOn "\n"}}

  {{range $f := $filters}}
    {{if eq $ext_name $f}}true{{end}}
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if a function is intercepted by vulkan::driver.
------------------------------------------------------------------------------
*/}}
{{define "driver.IsIntercepted"}}
  {{AssertType $ "Function"}}

  {{if (Macro "IsFunctionSupported" $)}}
    {{/* Create functions of dispatchable objects */}}
    {{     if eq $.Name "vkCreateInstance"}}true
    {{else if eq $.Name "vkCreateDevice"}}true
    {{else if eq $.Name "vkEnumeratePhysicalDevices"}}true
    {{else if eq $.Name "vkGetDeviceQueue"}}true
    {{else if eq $.Name "vkAllocateCommandBuffers"}}true

    {{/* Destroy functions of dispatchable objects */}}
    {{else if eq $.Name "vkDestroyInstance"}}true
    {{else if eq $.Name "vkDestroyDevice"}}true

    {{/* Enumeration of extensions */}}
    {{else if eq $.Name "vkEnumerateInstanceExtensionProperties"}}true
    {{else if eq $.Name "vkEnumerateDeviceExtensionProperties"}}true

    {{else if eq $.Name "vkGetInstanceProcAddr"}}true
    {{else if eq $.Name "vkGetDeviceProcAddr"}}true

    {{end}}

    {{$ext := GetAnnotation $ "extension"}}
    {{if $ext}}
      {{Macro "driver.IsExtensionIntercepted" $ext}}
    {{end}}

  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if a function needs a ProcHook stub.
------------------------------------------------------------------------------
*/}}
{{define "driver.NeedProcHookStub"}}
  {{AssertType $ "Function"}}

  {{if and (Macro "driver.IsIntercepted" $) (Macro "IsDeviceDispatched" $)}}
    {{$ext := GetAnnotation $ "extension"}}
    {{if $ext}}
      {{if not (Macro "IsExtensionInternal" $ext)}}true{{end}}
    {{end}}
  {{end}}
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits definition of struct ProcHook.
-------------------------------------------------------------------------------
*/}}
{{define "driver.C++.DefineProcHookType"}}
  struct ProcHook {
      enum Type {
        GLOBAL,
        INSTANCE,
        DEVICE,
      };

      enum Extension {
        {{$exts := Strings (Macro "driver.InterceptedExtensions") | SplitOn "\n"}}
        {{range $e := $exts}}
          {{TrimPrefix "VK_" $e}},
        {{end}}

        EXTENSION_CORE, // valid bit
        EXTENSION_COUNT,
        EXTENSION_UNKNOWN,
      };

      const char* name;
      Type type;
      Extension extension;

      PFN_vkVoidFunction proc;
      PFN_vkVoidFunction checked_proc;  // always nullptr for non-device hooks
  };
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits INIT_PROC_EXT macro for vulkan::driver.
-------------------------------------------------------------------------------
*/}}
{{define "driver.C++.DefineInitProcExtMacro"}}
  #define INIT_PROC_EXT(ext, obj, proc) do {                    \
      if (extensions[ProcHook::ext])                            \
        INIT_PROC(obj, proc);                                   \
  } while(0)
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits a stub for ProcHook::checked_proc.
-------------------------------------------------------------------------------
*/}}
{{define "driver.C++.DefineProcHookStub"}}
  {{AssertType $ "Function"}}

  {{if (Macro "driver.NeedProcHookStub" $)}}
    {{$ext := GetAnnotation $ "extension"}}
    {{$ext_name := index $ext.Arguments 0}}

    {{$base := (Macro "BaseName" $)}}

    VKAPI_ATTR {{Node "Type" $.Return}} checked{{$base}}({{Macro "Parameters" $}}) {
      {{$p0 := index $.CallParameters 0}}
      {{$ext_hook := Strings ("ProcHook::") (Macro "BaseName" $ext)}}

      if (GetData({{$p0.Name}}).hook_extensions[{{$ext_hook}}]) {
        {{if not (IsVoid $.Return.Type)}}return {{end}}
        {{$base}}({{Macro "Arguments" $}});
      } else {
        Logger({{$p0.Name}}).Err({{$p0.Name}}, "{{$ext_name}} not enabled. {{$.Name}} not executed.");
        {{if not (IsVoid $.Return.Type)}}return VK_SUCCESS;{{end}}
      }
    }

  {{end}}
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits definition of a global ProcHook.
-------------------------------------------------------------------------------
*/}}
{{define "driver.C++.DefineGlobalProcHook"}}
  {{AssertType $ "Function"}}

  {{$base := (Macro "BaseName" $)}}

  {{$ext := GetAnnotation $ "extension"}}
  {{if $ext}}
    {{Error "invalid global extension"}}
  {{end}}

  {
    "{{$.Name}}",
    ProcHook::GLOBAL,
    ProcHook::EXTENSION_CORE,
    reinterpret_cast<PFN_vkVoidFunction>({{$base}}),
    nullptr,
  },
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits definition of an instance ProcHook.
-------------------------------------------------------------------------------
*/}}
{{define "driver.C++.DefineInstanceProcHook"}}
  {{AssertType $ "Function"}}

  {{$base := (Macro "BaseName" $)}}

  {
    "{{$.Name}}",
    ProcHook::INSTANCE,

    {{$ext := GetAnnotation $ "extension"}}
    {{if $ext}}
      ProcHook::{{Macro "BaseName" $ext}},

      {{if (Macro "IsExtensionInternal" $ext)}}
        nullptr,
        nullptr,
      {{else}}
        reinterpret_cast<PFN_vkVoidFunction>({{$base}}),
        nullptr,
      {{end}}
    {{else}}
      ProcHook::EXTENSION_CORE,
      reinterpret_cast<PFN_vkVoidFunction>({{$base}}),
      nullptr,
    {{end}}
  },
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits definition of a device ProcHook.
-------------------------------------------------------------------------------
*/}}
{{define "driver.C++.DefineDeviceProcHook"}}
  {{AssertType $ "Function"}}

  {{$base := (Macro "BaseName" $)}}

  {
    "{{$.Name}}",
    ProcHook::DEVICE,

    {{$ext := GetAnnotation $ "extension"}}
    {{if $ext}}
      ProcHook::{{Macro "BaseName" $ext}},

      {{if (Macro "IsExtensionInternal" $ext)}}
        nullptr,
        nullptr,
      {{else}}
        reinterpret_cast<PFN_vkVoidFunction>({{$base}}),
        reinterpret_cast<PFN_vkVoidFunction>(checked{{$base}}),
      {{end}}
    {{else}}
      ProcHook::EXTENSION_CORE,
      reinterpret_cast<PFN_vkVoidFunction>({{$base}}),
      nullptr,
    {{end}}
  },
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits true if a function is needed by vulkan::driver.
-------------------------------------------------------------------------------
*/}}
{{define "driver.IsDriverTableEntry"}}
  {{AssertType $ "Function"}}

  {{if (Macro "IsFunctionSupported" $)}}
    {{/* Create functions of dispatchable objects */}}
    {{     if eq $.Name "vkCreateDevice"}}true
    {{else if eq $.Name "vkGetDeviceQueue"}}true
    {{else if eq $.Name "vkAllocateCommandBuffers"}}true

    {{/* Destroy functions of dispatchable objects */}}
    {{else if eq $.Name "vkDestroyInstance"}}true
    {{else if eq $.Name "vkDestroyDevice"}}true

    {{/* Enumeration of extensions */}}
    {{else if eq $.Name "vkEnumerateDeviceExtensionProperties"}}true

    {{/* We cache physical devices in loader.cpp */}}
    {{else if eq $.Name "vkEnumeratePhysicalDevices"}}true

    {{else if eq $.Name "vkGetInstanceProcAddr"}}true
    {{else if eq $.Name "vkGetDeviceProcAddr"}}true

    {{/* VK_KHR_swapchain->VK_ANDROID_native_buffer translation */}}
    {{else if eq $.Name "vkCreateImage"}}true
    {{else if eq $.Name "vkDestroyImage"}}true

    {{end}}

    {{$ext := GetAnnotation $ "extension"}}
    {{if $ext}}
      {{$ext_name := index $ext.Arguments 0}}
      {{     if eq $ext_name "VK_ANDROID_native_buffer"}}true
      {{else if eq $ext_name "VK_EXT_debug_report"}}true
      {{end}}
    {{end}}
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if an instance-dispatched function is needed by vulkan::driver.
------------------------------------------------------------------------------
*/}}
{{define "driver.IsInstanceDriverTableEntry"}}
  {{AssertType $ "Function"}}

  {{if and (Macro "driver.IsDriverTableEntry" $) (Macro "IsInstanceDispatched" $)}}
    true
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emits true if a device-dispatched function is needed by vulkan::driver.
------------------------------------------------------------------------------
*/}}
{{define "driver.IsDeviceDriverTableEntry"}}
  {{AssertType $ "Function"}}

  {{if and (Macro "driver.IsDriverTableEntry" $) (Macro "IsDeviceDispatched" $)}}
    true
  {{end}}
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits a function/extension name without the "vk"/"VK_" prefix.
-------------------------------------------------------------------------------
*/}}
{{define "BaseName"}}
  {{     if IsFunction $}}{{TrimPrefix "vk" $.Name}}
  {{else if eq $.Name "extension"}}{{TrimPrefix "VK_" (index $.Arguments 0)}}
  {{else}}{{Error "invalid use of BaseName"}}
  {{end}}
{{end}}


{{/*
-------------------------------------------------------------------------------
  Emits a comma-separated list of C parameter names for the given command.
-------------------------------------------------------------------------------
*/}}
{{define "Arguments"}}
  {{AssertType $ "Function"}}

  {{ForEach $.CallParameters "ParameterName" | JoinWith ", "}}
{{end}}


{{/*
------------------------------------------------------------------------------
------------------------------------------------------------------------------
*/}}
{{define "IsGloballyDispatched"}}
  {{AssertType $ "Function"}}
  {{if and (Macro "IsFunctionSupported" $) (eq (Macro "Vtbl" $) "Global")}}
    true
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emit "true" for supported functions that undergo table dispatch. Only global
  functions and functions handled in the loader top without calling into
  lower layers are not dispatched.
------------------------------------------------------------------------------
*/}}
{{define "IsInstanceDispatched"}}
  {{AssertType $ "Function"}}
  {{if and (Macro "IsFunctionSupported" $) (eq (Macro "Vtbl" $) "Instance")}}
    true
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emit "true" for supported functions that can have device-specific dispatch.
------------------------------------------------------------------------------
*/}}
{{define "IsDeviceDispatched"}}
  {{AssertType $ "Function"}}
  {{if and (Macro "IsFunctionSupported" $) (eq (Macro "Vtbl" $) "Device")}}
    true
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emit "true" if a function is core or from a supportable extension.
------------------------------------------------------------------------------
*/}}
{{define "IsFunctionSupported"}}
  {{AssertType $ "Function"}}
  {{if not (GetAnnotation $ "pfn")}}
    {{$ext := GetAnnotation $ "extension"}}
    {{if not $ext}}true
    {{else if not (Macro "IsExtensionBlacklisted" $ext)}}true
    {{end}}
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Decides whether a function should be exported from the Android Vulkan
  library. Functions in the core API and in loader extensions are exported.
------------------------------------------------------------------------------
*/}}
{{define "IsFunctionExported"}}
  {{AssertType $ "Function"}}

  {{if (Macro "IsFunctionSupported" $)}}
    {{$ext := GetAnnotation $ "extension"}}
    {{if $ext}}
      {{Macro "IsExtensionExported" $ext}}
    {{else}}
      true
    {{end}}
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Emit "true" if an extension is unsupportable on Android.
------------------------------------------------------------------------------
*/}}
{{define "IsExtensionBlacklisted"}}
  {{$ext := index $.Arguments 0}}
  {{     if eq $ext "VK_KHR_display"}}true
  {{else if eq $ext "VK_KHR_display_swapchain"}}true
  {{else if eq $ext "VK_KHR_xlib_surface"}}true
  {{else if eq $ext "VK_KHR_xcb_surface"}}true
  {{else if eq $ext "VK_KHR_wayland_surface"}}true
  {{else if eq $ext "VK_KHR_mir_surface"}}true
  {{else if eq $ext "VK_KHR_win32_surface"}}true
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Reports whether an extension is implemented entirely by the loader,
  so drivers should not enumerate it.
------------------------------------------------------------------------------
*/}}
{{define "IsExtensionExported"}}
  {{$ext := index $.Arguments 0}}
  {{     if eq $ext "VK_KHR_surface"}}true
  {{else if eq $ext "VK_KHR_swapchain"}}true
  {{else if eq $ext "VK_KHR_android_surface"}}true
  {{end}}
{{end}}


{{/*
------------------------------------------------------------------------------
  Reports whether an extension is internal to the loader and drivers,
  so the loader should not enumerate it.
------------------------------------------------------------------------------
*/}}
{{define "IsExtensionInternal"}}
  {{$ext := index $.Arguments 0}}
  {{     if eq $ext "VK_ANDROID_native_buffer"}}true
  {{end}}
{{end}}