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// Copyright 2023 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn/native/d3d/PlatformFunctions.h"
#include <comdef.h>
#include <algorithm>
#include <array>
#include <sstream>
#include <utility>
#include "dawn/common/DynamicLib.h"
namespace dawn::native::d3d {
namespace {
// Extract Version from "10.0.{Version}.0" if possible, otherwise return 0.
uint32_t GetWindowsSDKVersionFromDirectoryName(const char* directoryName) {
constexpr char kPrefix[] = "10.0.";
constexpr char kPostfix[] = ".0";
constexpr uint32_t kPrefixLen = sizeof(kPrefix) - 1;
constexpr uint32_t kPostfixLen = sizeof(kPostfix) - 1;
const uint32_t directoryNameLen = strlen(directoryName);
if (directoryNameLen < kPrefixLen + kPostfixLen + 1) {
return 0;
}
// Check if directoryName starts with "10.0.".
if (strncmp(directoryName, kPrefix, kPrefixLen) != 0) {
return 0;
}
// Check if directoryName ends with ".0".
if (strncmp(directoryName + (directoryNameLen - kPostfixLen), kPostfix, kPostfixLen) != 0) {
return 0;
}
// Extract Version from "10.0.{Version}.0" and convert Version into an integer.
return atoi(directoryName + kPrefixLen);
}
class ScopedFileHandle final {
public:
explicit ScopedFileHandle(HANDLE handle) : mHandle(handle) {}
~ScopedFileHandle() {
if (mHandle != INVALID_HANDLE_VALUE) {
ASSERT(FindClose(mHandle));
}
}
HANDLE GetHandle() const { return mHandle; }
private:
HANDLE mHandle;
};
std::string GetWindowsSDKBasePath() {
const char* kDefaultWindowsSDKPath = "C:\\Program Files (x86)\\Windows Kits\\10\\bin\\*";
WIN32_FIND_DATAA fileData;
ScopedFileHandle handle(FindFirstFileA(kDefaultWindowsSDKPath, &fileData));
if (handle.GetHandle() == INVALID_HANDLE_VALUE) {
return "";
}
uint32_t highestWindowsSDKVersion = 0;
do {
if (!(fileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
continue;
}
highestWindowsSDKVersion = std::max(
highestWindowsSDKVersion, GetWindowsSDKVersionFromDirectoryName(fileData.cFileName));
} while (FindNextFileA(handle.GetHandle(), &fileData));
if (highestWindowsSDKVersion == 0) {
return "";
}
// Currently we only support using DXC on x64.
std::ostringstream ostream;
ostream << "C:\\Program Files (x86)\\Windows Kits\\10\\bin\\10.0." << highestWindowsSDKVersion
<< ".0\\x64\\";
return ostream.str();
}
} // anonymous namespace
PlatformFunctions::PlatformFunctions() = default;
PlatformFunctions::~PlatformFunctions() = default;
MaybeError PlatformFunctions::LoadFunctions() {
DAWN_TRY(LoadDXGI());
LoadDXCLibraries();
DAWN_TRY(LoadFXCompiler());
return {};
}
MaybeError PlatformFunctions::LoadDXGI() {
#if DAWN_PLATFORM_IS(WINUWP)
#if defined(_DEBUG)
// DXGIGetDebugInterface1 is tagged as a development-only capability
// which implies that linking to this function will cause
// the application to fail Windows store certification
// But we need it when debuging using VS Graphics Diagnostics or PIX
// So we only link to it in debug build
dxgiGetDebugInterface1 = &DXGIGetDebugInterface1;
#endif
createDxgiFactory2 = &CreateDXGIFactory2;
#else
std::string error;
if (!mDXGILib.Open("dxgi.dll", &error) ||
!mDXGILib.GetProc(&dxgiGetDebugInterface1, "DXGIGetDebugInterface1", &error) ||
!mDXGILib.GetProc(&createDxgiFactory2, "CreateDXGIFactory2", &error)) {
return DAWN_INTERNAL_ERROR(error.c_str());
}
#endif
return {};
}
void PlatformFunctions::LoadDXCLibraries() {
// TODO(dawn:766)
// Statically linked with dxcompiler.lib in UWP
// currently linked with dxcompiler.lib making CoreApp unable to activate
// LoadDXIL and LoadDXCompiler will fail in UWP, but LoadFunctions() can still be
// successfully executed.
const std::string& windowsSDKBasePath = GetWindowsSDKBasePath();
LoadDXIL(windowsSDKBasePath);
LoadDXCompiler(windowsSDKBasePath);
}
void PlatformFunctions::LoadDXIL(const std::string& baseWindowsSDKPath) {
const char* dxilDLLName = "dxil.dll";
const std::array<std::string, 2> kDxilDLLPaths = {
{dxilDLLName, baseWindowsSDKPath + dxilDLLName}};
for (const std::string& dxilDLLPath : kDxilDLLPaths) {
if (mDXILLib.Open(dxilDLLPath, nullptr)) {
return;
}
}
ASSERT(!mDXILLib.Valid());
}
void PlatformFunctions::LoadDXCompiler(const std::string& baseWindowsSDKPath) {
// DXIL must be loaded before DXC, otherwise shader signing is unavailable
if (!mDXILLib.Valid()) {
return;
}
const char* dxCompilerDLLName = "dxcompiler.dll";
const std::array<std::string, 2> kDxCompilerDLLPaths = {
{dxCompilerDLLName, baseWindowsSDKPath + dxCompilerDLLName}};
DynamicLib dxCompilerLib;
for (const std::string& dxCompilerDLLName : kDxCompilerDLLPaths) {
if (dxCompilerLib.Open(dxCompilerDLLName, nullptr)) {
break;
}
}
if (dxCompilerLib.Valid() &&
dxCompilerLib.GetProc(&dxcCreateInstance, "DxcCreateInstance", nullptr)) {
mDXCompilerLib = std::move(dxCompilerLib);
} else {
mDXILLib.Close();
}
}
MaybeError PlatformFunctions::LoadFXCompiler() {
#if DAWN_PLATFORM_IS(WINUWP)
d3dCompile = &D3DCompile;
d3dDisassemble = &D3DDisassemble;
#else
std::string error;
if (!mFXCompilerLib.Open("d3dcompiler_47.dll", &error) ||
!mFXCompilerLib.GetProc(&d3dCompile, "D3DCompile", &error) ||
!mFXCompilerLib.GetProc(&d3dDisassemble, "D3DDisassemble", &error)) {
return DAWN_INTERNAL_ERROR(error.c_str());
}
#endif
return {};
}
// Use Backend::IsDXCAvaliable if possible, which also check the DXC is no older than a given
// version
bool PlatformFunctions::IsDXCBinaryAvailable() const {
return mDXILLib.Valid() && mDXCompilerLib.Valid();
}
} // namespace dawn::native::d3d