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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* 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.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "ShaderToolsCommon.hpp"
#include "DebugUtilities.hpp"
#include "DataBlobImpl.hpp"
namespace Diligent
{
namespace
{
const ShaderMacro VSMacros[] = {{"VERTEX_SHADER", "1"}, {}};
const ShaderMacro PSMacros[] = {{"FRAGMENT_SHADER", "1"}, {"PIXEL_SHADER", "1"}, {}};
const ShaderMacro GSMacros[] = {{"GEOMETRY_SHADER", "1"}, {}};
const ShaderMacro HSMacros[] = {{"TESS_CONTROL_SHADER", "1"}, {"HULL_SHADER", "1"}, {}};
const ShaderMacro DSMacros[] = {{"TESS_EVALUATION_SHADER", "1"}, {"DOMAIN_SHADER", "1"}, {}};
const ShaderMacro CSMacros[] = {{"COMPUTE_SHADER", "1"}, {}};
const ShaderMacro ASMacros[] = {{"TASK_SHADER", "1"}, {"AMPLIFICATION_SHADER", "1"}, {}};
const ShaderMacro MSMacros[] = {{"MESH_SHADER", "1"}, {}};
const ShaderMacro RGMacros[] = {{"RAY_GEN_SHADER", "1"}, {}};
const ShaderMacro RMMacros[] = {{"RAY_MISS_SHADER", "1"}, {}};
const ShaderMacro RCHMacros[] = {{"RAY_CLOSEST_HIT_SHADER", "1"}, {}};
const ShaderMacro RAHMacros[] = {{"RAY_ANY_HIT_SHADER", "1"}, {}};
const ShaderMacro RIMacros[] = {{"RAY_INTERSECTION_SHADER", "1"}, {}};
const ShaderMacro RCMacros[] = {{"RAY_CALLABLE_SHADER", "1"}, {}};
} // namespace
const ShaderMacro* GetShaderTypeMacros(SHADER_TYPE Type)
{
static_assert(SHADER_TYPE_LAST == SHADER_TYPE_CALLABLE, "Please update the switch below to handle the new shader type");
switch (Type)
{
// clang-format off
case SHADER_TYPE_VERTEX: return VSMacros;
case SHADER_TYPE_PIXEL: return PSMacros;
case SHADER_TYPE_GEOMETRY: return GSMacros;
case SHADER_TYPE_HULL: return HSMacros;
case SHADER_TYPE_DOMAIN: return DSMacros;
case SHADER_TYPE_COMPUTE: return CSMacros;
case SHADER_TYPE_AMPLIFICATION: return ASMacros;
case SHADER_TYPE_MESH: return MSMacros;
case SHADER_TYPE_RAY_GEN: return RGMacros;
case SHADER_TYPE_RAY_MISS: return RMMacros;
case SHADER_TYPE_RAY_CLOSEST_HIT: return RCHMacros;
case SHADER_TYPE_RAY_ANY_HIT: return RAHMacros;
case SHADER_TYPE_RAY_INTERSECTION: return RIMacros;
case SHADER_TYPE_CALLABLE: return RCMacros;
// clang-format on
default:
UNEXPECTED("Unexpected shader type");
return nullptr;
}
}
void AppendShaderMacros(std::string& Source, const ShaderMacro* Macros)
{
if (Macros == nullptr)
return;
for (auto* pMacro = Macros; pMacro->Name != nullptr && pMacro->Definition != nullptr; ++pMacro)
{
Source += "#define ";
Source += pMacro->Name;
Source += ' ';
Source += pMacro->Definition;
Source += "\n";
}
}
void AppendShaderTypeDefinitions(std::string& Source, SHADER_TYPE Type)
{
AppendShaderMacros(Source, GetShaderTypeMacros(Type));
}
const char* ReadShaderSourceFile(const char* SourceCode,
IShaderSourceInputStreamFactory* pShaderSourceStreamFactory,
const char* FilePath,
RefCntAutoPtr<IDataBlob>& pFileData,
size_t& SourceCodeLen) noexcept(false)
{
SourceCodeLen = 0;
if (SourceCode != nullptr)
{
VERIFY(FilePath == nullptr, "FilePath must be null when SourceCode is not null");
SourceCodeLen = strlen(SourceCode);
}
else
{
if (pShaderSourceStreamFactory != nullptr)
{
if (FilePath != nullptr)
{
RefCntAutoPtr<IFileStream> pSourceStream;
pShaderSourceStreamFactory->CreateInputStream(FilePath, &pSourceStream);
if (pSourceStream == nullptr)
LOG_ERROR_AND_THROW("Failed to load shader source file '", FilePath, '\'');
pFileData = MakeNewRCObj<DataBlobImpl>{}(0);
pSourceStream->ReadBlob(pFileData);
SourceCode = reinterpret_cast<char*>(pFileData->GetDataPtr());
SourceCodeLen = pFileData->GetSize();
}
else
{
UNEXPECTED("FilePath is null");
}
}
else
{
UNEXPECTED("Input stream factory is null");
}
}
return SourceCode;
}
void AppendShaderSourceCode(std::string& Source, const ShaderCreateInfo& ShaderCI) noexcept(false)
{
RefCntAutoPtr<IDataBlob> pFileData;
size_t SourceCodeLen = 0;
const auto* SourceCode =
ReadShaderSourceFile(ShaderCI.Source, ShaderCI.pShaderSourceStreamFactory,
ShaderCI.FilePath, pFileData, SourceCodeLen);
Source.append(SourceCode, SourceCodeLen);
}
} // namespace Diligent
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