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// Copyright 2021 The Tint 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 "src/tint/val/val.h"
#include "src/tint/utils/io/command.h"
#include "src/tint/utils/io/tmpfile.h"
#ifdef _WIN32
#include <Windows.h>
#include <d3dcommon.h>
#include <d3dcompiler.h>
#include <wrl.h>
using Microsoft::WRL::ComPtr;
#endif // _WIN32
namespace tint::val {
Result HlslUsingDXC(const std::string& dxc_path,
const std::string& source,
const EntryPointList& entry_points,
const std::vector<std::string>& overrides) {
Result result;
auto dxc = utils::Command(dxc_path);
if (!dxc.Found()) {
result.output = "DXC not found at '" + std::string(dxc_path) + "'";
result.failed = true;
return result;
}
utils::TmpFile file;
file << source;
for (auto ep : entry_points) {
const char* profile = "";
switch (ep.second) {
case ast::PipelineStage::kNone:
result.output = "Invalid PipelineStage";
result.failed = true;
return result;
case ast::PipelineStage::kVertex:
profile = "-T vs_6_0";
break;
case ast::PipelineStage::kFragment:
profile = "-T ps_6_0";
break;
case ast::PipelineStage::kCompute:
profile = "-T cs_6_0";
break;
}
// Match Dawn's compile flags
// See dawn\src\dawn_native\d3d12\RenderPipelineD3D12.cpp
// and dawn_native\d3d12\ShaderModuleD3D12.cpp (GetDXCArguments)
const char* compileFlags =
"/Zpr " // D3DCOMPILE_PACK_MATRIX_ROW_MAJOR
"/Gis"; // D3DCOMPILE_IEEE_STRICTNESS
std::string defs;
defs.reserve(overrides.size() * 20);
for (auto& o : overrides) {
defs += "/D" + o + " ";
}
auto res = dxc(profile, "-E " + ep.first, compileFlags, file.Path(), defs);
if (!res.out.empty()) {
if (!result.output.empty()) {
result.output += "\n";
}
result.output += res.out;
}
if (!res.err.empty()) {
if (!result.output.empty()) {
result.output += "\n";
}
result.output += res.err;
}
result.failed = (res.error_code != 0);
}
if (entry_points.empty()) {
result.output = "No entrypoint found";
result.failed = true;
return result;
}
return result;
}
#ifdef _WIN32
Result HlslUsingFXC(const std::string& source,
const EntryPointList& entry_points,
const std::vector<std::string>& overrides) {
Result result;
// This library leaks if an error happens in this function, but it is ok
// because it is loaded at most once, and the executables using HlslUsingFXC
// are short-lived.
HMODULE fxcLib = LoadLibraryA("d3dcompiler_47.dll");
if (fxcLib == nullptr) {
result.output = "Couldn't load FXC";
result.failed = true;
return result;
}
pD3DCompile d3dCompile = reinterpret_cast<pD3DCompile>(
reinterpret_cast<void*>(GetProcAddress(fxcLib, "D3DCompile")));
if (d3dCompile == nullptr) {
result.output = "Couldn't load D3DCompile from FXC";
result.failed = true;
return result;
}
for (auto ep : entry_points) {
const char* profile = "";
switch (ep.second) {
case ast::PipelineStage::kNone:
result.output = "Invalid PipelineStage";
result.failed = true;
return result;
case ast::PipelineStage::kVertex:
profile = "vs_5_1";
break;
case ast::PipelineStage::kFragment:
profile = "ps_5_1";
break;
case ast::PipelineStage::kCompute:
profile = "cs_5_1";
break;
}
// Match Dawn's compile flags
// See dawn\src\dawn_native\d3d12\RenderPipelineD3D12.cpp
UINT compileFlags = D3DCOMPILE_OPTIMIZATION_LEVEL0 | D3DCOMPILE_PACK_MATRIX_ROW_MAJOR |
D3DCOMPILE_IEEE_STRICTNESS;
auto overrides_copy = overrides; // Copy so that we can replace '=' with '\0'
std::vector<D3D_SHADER_MACRO> macros;
macros.reserve(overrides_copy.size() * 2);
for (auto& o : overrides_copy) {
if (auto sep = o.find_first_of('='); sep != std::string::npos) {
// Replace '=' with '\0' so we can point directly into the allocated string buffer
o[sep] = '\0';
macros.push_back(D3D_SHADER_MACRO{&o[0], &o[sep + 1]});
} else {
macros.emplace_back(D3D_SHADER_MACRO{o.c_str(), NULL});
}
}
macros.emplace_back(D3D_SHADER_MACRO{NULL, NULL});
ComPtr<ID3DBlob> compiledShader;
ComPtr<ID3DBlob> errors;
HRESULT cr = d3dCompile(source.c_str(), // pSrcData
source.length(), // SrcDataSize
nullptr, // pSourceName
macros.data(), // pDefines
nullptr, // pInclude
ep.first.c_str(), // pEntrypoint
profile, // pTarget
compileFlags, // Flags1
0, // Flags2
&compiledShader, // ppCode
&errors); // ppErrorMsgs
if (FAILED(cr)) {
result.output = static_cast<char*>(errors->GetBufferPointer());
result.failed = true;
return result;
}
}
FreeLibrary(fxcLib);
if (entry_points.empty()) {
result.output = "No entrypoint found";
result.failed = true;
return result;
}
return result;
}
#endif // _WIN32
} // namespace tint::val