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// dxc-support.cpp
#include "compiler.h"
// This file implements support for invoking the `dxcompiler`
// library to translate HLSL to DXIL.
#if defined(_WIN32)
# if !defined(SLANG_ENABLE_DXIL_SUPPORT)
# define SLANG_ENABLE_DXIL_SUPPORT 1
# endif
#endif
#if !defined(SLANG_ENABLE_DXIL_SUPPORT)
# define SLANG_ENABLE_DXIL_SUPPORT 0
#endif
#if SLANG_ENABLE_DXIL_SUPPORT
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX
#include <Windows.h>
#include <Unknwn.h>
#include "../../external/dxc/dxcapi.h"
#undef WIN32_LEAN_AND_MEAN
#undef NOMINMAX
#include "../core/platform.h"
namespace Slang
{
char const* GetHLSLProfileName(Profile profile);
String emitHLSLForEntryPoint(
EntryPointRequest* entryPoint,
TargetRequest* targetReq);
SharedLibrary loadDXCSharedLibrary(CompileRequest* request)
{
// TODO(tfoley): Let user specify name/path of library to use.
char const* libraryName = "dxcompiler";
SharedLibrary library = SharedLibrary::load(libraryName);
if (!library)
{
request->mSink.diagnose(SourceLoc(), Diagnostics::failedToLoadDynamicLibrary, libraryName);
}
return library;
}
SharedLibrary getDXCSharedLibrary(CompileRequest* request)
{
static SharedLibrary library = loadDXCSharedLibrary(request);
return library;
}
int emitDXILForEntryPointUsingDXC(
EntryPointRequest* entryPoint,
TargetRequest* targetReq,
List<uint8_t>& outCode)
{
auto compileRequest = entryPoint->compileRequest;
// First deal with all the rigamarole of loading
// the `dxcompiler` library, and creating the
// top-level COM objects that will be used to
// compile things.
static DxcCreateInstanceProc dxcCreateInstance = nullptr;
if (!dxcCreateInstance)
{
auto dxcSharedLibrary = getDXCSharedLibrary(compileRequest);
if (!dxcSharedLibrary)
return 1;
dxcCreateInstance = (DxcCreateInstanceProc) dxcSharedLibrary.findFuncByName("DxcCreateInstance");
if (!dxcCreateInstance)
return 1;
}
IDxcCompiler* dxcCompiler = nullptr;
if (FAILED(dxcCreateInstance(
CLSID_DxcCompiler,
__uuidof(dxcCompiler),
(LPVOID*) &dxcCompiler)))
{
return 1;
}
IDxcLibrary* dxcLibrary = nullptr;
if (FAILED(dxcCreateInstance(
CLSID_DxcLibrary,
__uuidof(dxcLibrary),
(LPVOID*) &dxcLibrary)))
{
return 1;
}
// Now let's go ahead and generate HLSL for the entry
// point, since we'll need that to feed into dxc.
auto hlslCode = emitHLSLForEntryPoint(entryPoint, targetReq);
maybeDumpIntermediate(entryPoint->compileRequest, hlslCode.Buffer(), CodeGenTarget::HLSL);
// Wrap the
// Create blob from the string
IDxcBlobEncoding* dxcSourceBlob = nullptr;
if (FAILED(dxcLibrary->CreateBlobWithEncodingFromPinned(
(LPBYTE)hlslCode.Buffer(),
(UINT32)hlslCode.Length(),
0,
&dxcSourceBlob)))
{
return 1;
}
WCHAR const* args[16];
UINT32 argCount = 0;
// TODO: deal with
bool treatWarningsAsErrors = false;
if (treatWarningsAsErrors)
{
args[argCount++] = L"-WX";
}
String entryPointName = getText(entryPoint->name);
OSString wideEntryPointName = entryPointName.ToWString();
String profileName = GetHLSLProfileName(entryPoint->profile);
OSString wideProfileName = profileName.ToWString();
IDxcOperationResult* dxcResult = nullptr;
if (FAILED(dxcCompiler->Compile(dxcSourceBlob,
L"slang",
wideEntryPointName.begin(),
wideProfileName.begin(),
args,
argCount,
nullptr, // `#define`s
0, // `#define` count
nullptr, // `#include` handler
&dxcResult)))
{
return 1;
}
// Retrieve result.
HRESULT resultCode = S_OK;
if (FAILED(dxcResult->GetStatus(&resultCode)))
{
// This indicates that we failed to retrieve the reuslt...
return 1;
}
// Note: it seems like the dxcompiler interface
// doesn't support querying diagnostic output
// *unless* the compile failed (no way to get
// warnings out!?).
// Verify compile result
if (FAILED(resultCode))
{
// Compilation failed.
// Try to read any diagnostic output.
IDxcBlobEncoding* dxcErrorBlob = nullptr;
if (!FAILED(dxcResult->GetErrorBuffer(&dxcErrorBlob)))
{
compileRequest->mSink.diagnoseRaw(
FAILED(resultCode) ? Severity::Error : Severity::Warning,
(char const*)dxcErrorBlob->GetBufferPointer());
dxcErrorBlob->Release();
}
return 1;
}
// Okay, the compile supposedly succeeded, so we
// just need to grab the buffer with the output DXIL.
IDxcBlob* dxcResultBlob = nullptr;
if (FAILED(dxcResult->GetResult(&dxcResultBlob)))
{
return 1;
}
outCode.AddRange(
(uint8_t const*)dxcResultBlob->GetBufferPointer(),
(int) dxcResultBlob->GetBufferSize());
// Clean up after ourselves.
if(dxcResultBlob) dxcResultBlob ->Release();
if(dxcResult) dxcResult ->Release();
if(dxcLibrary) dxcLibrary ->Release();
if(dxcCompiler) dxcCompiler ->Release();
return 0;
}
String dissassembleDXILUsingDXC(
CompileRequest* compileRequest,
void const* data,
size_t size)
{
// First deal with all the rigamarole of loading
// the `dxcompiler` library, and creating the
// top-level COM objects that will be used to
// compile things.
static DxcCreateInstanceProc dxcCreateInstance = nullptr;
if (!dxcCreateInstance)
{
auto dxcSharedLibrary = getDXCSharedLibrary(compileRequest);
if (!dxcSharedLibrary)
return 1;
dxcCreateInstance = (DxcCreateInstanceProc) dxcSharedLibrary.findFuncByName("DxcCreateInstance");
if (!dxcCreateInstance)
return 1;
}
IDxcCompiler* dxcCompiler = nullptr;
if (FAILED(dxcCreateInstance(
CLSID_DxcCompiler,
__uuidof(dxcCompiler),
(LPVOID*) &dxcCompiler)))
{
return 1;
}
IDxcLibrary* dxcLibrary = nullptr;
if (FAILED(dxcCreateInstance(
CLSID_DxcLibrary,
__uuidof(dxcLibrary),
(LPVOID*) &dxcLibrary)))
{
return 1;
}
// Create blob from the input data
IDxcBlobEncoding* dxcSourceBlob = nullptr;
if (FAILED(dxcLibrary->CreateBlobWithEncodingFromPinned(
(LPBYTE) data,
(UINT32) size,
0,
&dxcSourceBlob)))
{
return 1;
}
IDxcBlobEncoding* dxcResultBlob = nullptr;
if(FAILED(dxcCompiler->Disassemble(
dxcSourceBlob,
&dxcResultBlob)))
{
return 1;
}
String result;
char const* codeBegin = (char const*)dxcResultBlob->GetBufferPointer();
char const* codeEnd = codeBegin + dxcResultBlob->GetBufferSize() - 1;
result.append(codeBegin, codeEnd);
if(dxcResultBlob) dxcResultBlob ->Release();
if(dxcLibrary) dxcLibrary ->Release();
if(dxcCompiler) dxcCompiler ->Release();
return result;
}
} // namespace Slang
#endif
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