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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 <string>
#include "src/tint/val/val.h"
#include "src/tint/utils/io/command.h"
#include "src/tint/utils/io/tmpfile.h"
#include "src/tint/utils/string.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,
bool require_16bit_types) {
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;
}
// Native 16-bit types, e.g. float16_t, require SM6.2. Otherwise we use SM6.0.
const char* shader_model_version = require_16bit_types ? "6_2" : "6_0";
utils::TmpFile file;
file << source;
for (auto ep : entry_points) {
const char* stage_prefix = "";
switch (ep.second) {
case ast::PipelineStage::kNone:
result.output = "Invalid PipelineStage";
result.failed = true;
return result;
case ast::PipelineStage::kVertex:
stage_prefix = "vs";
break;
case ast::PipelineStage::kFragment:
stage_prefix = "ps";
break;
case ast::PipelineStage::kCompute:
stage_prefix = "cs";
break;
}
// Match Dawn's compile flags
// See dawn\src\dawn_native\d3d12\RenderPipelineD3D12.cpp
// and dawn_native\d3d12\ShaderModuleD3D12.cpp (GetDXCArguments)
auto res = dxc(
"-T " + std::string(stage_prefix) + "_" + std::string(shader_model_version), // Profile
"-E " + ep.first, // Entry point
"/Zpr", // D3DCOMPILE_PACK_MATRIX_ROW_MAJOR
"/Gis", // D3DCOMPILE_IEEE_STRICTNESS
require_16bit_types ? "-enable-16bit-types" : "", // Enable 16-bit if required
file.Path());
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);
// Remove the temporary file name from the output to keep output deterministic
result.output = utils::ReplaceAll(result.output, file.Path(), "shader.hlsl");
}
if (entry_points.empty()) {
result.output = "No entrypoint found";
result.failed = true;
return result;
}
return result;
}
#ifdef _WIN32
Result HlslUsingFXC(const std::string& fxc_path,
const std::string& source,
const EntryPointList& entry_points) {
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(fxc_path.c_str());
if (fxcLib == nullptr) {
result.output = "Couldn't load FXC";
result.failed = true;
return result;
}
auto* d3dCompile = reinterpret_cast<pD3DCompile>(
reinterpret_cast<void*>(GetProcAddress(fxcLib, "D3DCompile")));
auto* d3dDisassemble = reinterpret_cast<pD3DDisassemble>(
reinterpret_cast<void*>(GetProcAddress(fxcLib, "D3DDisassemble")));
if (d3dCompile == nullptr) {
result.output = "Couldn't load D3DCompile from FXC";
result.failed = true;
return result;
}
if (d3dDisassemble == nullptr) {
result.output = "Couldn't load D3DDisassemble 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;
ComPtr<ID3DBlob> compiledShader;
ComPtr<ID3DBlob> errors;
HRESULT res = d3dCompile(source.c_str(), // pSrcData
source.length(), // SrcDataSize
nullptr, // pSourceName
nullptr, // pDefines
nullptr, // pInclude
ep.first.c_str(), // pEntrypoint
profile, // pTarget
compileFlags, // Flags1
0, // Flags2
&compiledShader, // ppCode
&errors); // ppErrorMsgs
if (FAILED(res)) {
result.output = static_cast<char*>(errors->GetBufferPointer());
result.failed = true;
return result;
} else {
ComPtr<ID3DBlob> disassembly;
res = d3dDisassemble(compiledShader->GetBufferPointer(),
compiledShader->GetBufferSize(), 0, "", &disassembly);
if (FAILED(res)) {
result.output = "failed to disassemble shader";
} else {
result.output = static_cast<char*>(disassembly->GetBufferPointer());
}
}
}
FreeLibrary(fxcLib);
if (entry_points.empty()) {
result.output = "No entrypoint found";
result.failed = true;
return result;
}
return result;
}
#endif // _WIN32
} // namespace tint::val