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1059 lines
34 KiB
C++
1059 lines
34 KiB
C++
#include "technique.hpp"
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#include <array>
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#include <string>
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#include <utility>
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#include <osg/CullStack>
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#include <osg/Texture1D>
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#include <osg/Texture2D>
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#include <osg/Texture3D>
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#include <SDL_opengl_glext.h>
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#include <components/debug/debuglog.hpp>
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#include <components/files/conversion.hpp>
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#include <components/misc/strings/algorithm.hpp>
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#include <components/resource/imagemanager.hpp>
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#include <components/sceneutil/util.hpp>
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#include <components/stereo/multiview.hpp>
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#include <components/vfs/manager.hpp>
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#include "parse_constants.hpp"
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namespace
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{
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struct ProxyTextureData
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{
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osg::Texture::WrapMode wrap_s = osg::Texture::CLAMP_TO_EDGE;
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osg::Texture::WrapMode wrap_t = osg::Texture::CLAMP_TO_EDGE;
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osg::Texture::WrapMode wrap_r = osg::Texture::CLAMP_TO_EDGE;
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osg::Texture::FilterMode min_filter = osg::Texture::LINEAR_MIPMAP_LINEAR;
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osg::Texture::FilterMode mag_filter = osg::Texture::LINEAR;
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osg::Texture::InternalFormatMode compression = osg::Texture::USE_IMAGE_DATA_FORMAT;
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std::optional<int> source_format;
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std::optional<int> source_type;
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std::optional<int> internal_format;
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};
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}
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namespace fx
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{
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Technique::Technique(const VFS::Manager& vfs, Resource::ImageManager& imageManager, std::string name, int width,
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int height, bool ubo, bool supportsNormals)
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: mName(std::move(name))
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, mFileName(Files::pathToUnicodeString(
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(Files::pathFromUnicodeString(Technique::sSubdir) / (mName + Technique::sExt))))
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, mLastModificationTime(std::filesystem::file_time_type::clock::now())
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, mWidth(width)
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, mHeight(height)
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, mVFS(vfs)
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, mImageManager(imageManager)
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, mUBO(ubo)
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, mSupportsNormals(supportsNormals)
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{
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clear();
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}
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void Technique::clear()
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{
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mTextures.clear();
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mStatus = Status::Uncompiled;
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mValid = false;
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mHDR = false;
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mNormals = false;
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mLights = false;
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mEnabled = true;
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mPassMap.clear();
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mPasses.clear();
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mPassKeys.clear();
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mDefinedUniforms.clear();
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mRenderTargets.clear();
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mLastAppliedType = Pass::Type::None;
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mFlags = 0;
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mShared.clear();
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mAuthor = {};
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mDescription = {};
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mVersion = {};
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mGLSLExtensions.clear();
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mGLSLVersion = mUBO ? 330 : 120;
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mGLSLProfile.clear();
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mDynamic = false;
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}
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std::string Technique::getBlockWithLineDirective()
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{
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auto block = mLexer->getLastJumpBlock();
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std::string content = std::string(block.content);
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content = "\n#line " + std::to_string(block.line + 1) + "\n" + std::string(block.content) + "\n";
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return content;
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}
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Technique::UniformMap::iterator Technique::findUniform(const std::string& name)
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{
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return std::find_if(mDefinedUniforms.begin(), mDefinedUniforms.end(),
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[&name](const auto& uniform) { return uniform->mName == name; });
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}
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bool Technique::compile()
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{
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clear();
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if (!mVFS.exists(mFileName))
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{
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Log(Debug::Error) << "Could not load technique, file does not exist '" << mFileName << "'";
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mStatus = Status::File_Not_exists;
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return false;
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}
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try
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{
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std::string source(std::istreambuf_iterator<char>(*mVFS.get(getFileName())), {});
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parse(std::move(source));
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if (mPassKeys.empty())
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error("no pass list found, ensure you define one in a 'technique' block");
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int swaps = 0;
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for (auto& name : mPassKeys)
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{
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auto it = mPassMap.find(name);
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if (it == mPassMap.end())
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error(
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Misc::StringUtils::format("pass '%s' was found in the pass list, but there was no matching "
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"'fragment', 'vertex' or 'compute' block",
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std::string(name)));
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if (mLastAppliedType != Pass::Type::None && mLastAppliedType != it->second->mType)
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{
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swaps++;
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if (swaps == 2)
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Log(Debug::Warning) << "compute and pixel shaders are being swapped multiple times in shader "
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"chain, this can lead to serious performance drain.";
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}
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else
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mLastAppliedType = it->second->mType;
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if (Stereo::getMultiview())
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{
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mGLSLExtensions.insert("GL_OVR_multiview");
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mGLSLExtensions.insert("GL_OVR_multiview2");
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mGLSLExtensions.insert("GL_EXT_texture_array");
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}
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it->second->compile(*this, mShared);
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if (!it->second->mTarget.empty())
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{
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auto rtIt = mRenderTargets.find(it->second->mTarget);
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if (rtIt == mRenderTargets.end())
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error(Misc::StringUtils::format("target '%s' not defined", std::string(it->second->mTarget)));
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}
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mPasses.emplace_back(it->second);
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}
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if (mPasses.empty())
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error("invalid pass list, no passes defined for technique");
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mValid = true;
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}
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catch (const std::runtime_error& e)
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{
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clear();
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mStatus = Status::Parse_Error;
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mLastError = "Failed parsing technique '" + getName() + "' " + e.what();
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;
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Log(Debug::Error) << mLastError;
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}
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return mValid;
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}
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std::string Technique::getName() const
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{
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return mName;
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}
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std::string Technique::getFileName() const
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{
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return mFileName;
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}
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bool Technique::setLastModificationTime(std::filesystem::file_time_type timeStamp)
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{
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const bool isDirty = timeStamp != mLastModificationTime;
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mLastModificationTime = timeStamp;
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return isDirty;
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}
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[[noreturn]] void Technique::error(const std::string& msg)
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{
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mLexer->error(msg);
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}
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template <>
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void Technique::parseBlockImp<Lexer::Shared>()
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{
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if (!mLexer->jump())
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error(Misc::StringUtils::format("unterminated 'shared' block, expected closing brackets"));
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if (!mShared.empty())
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error("repeated 'shared' block, only one allowed per technique file");
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mShared = getBlockWithLineDirective();
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}
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template <>
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void Technique::parseBlockImp<Lexer::Technique>()
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{
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if (!mPassKeys.empty())
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error("exactly one 'technique' block can appear per file");
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while (!isNext<Lexer::Close_bracket>() && !isNext<Lexer::Eof>())
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{
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expect<Lexer::Literal>();
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auto key = std::get<Lexer::Literal>(mToken).value;
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expect<Lexer::Equal>();
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if (key == "passes")
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mPassKeys = parseLiteralList<Lexer::Comma>();
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else if (key == "version")
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mVersion = parseString();
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else if (key == "description")
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mDescription = parseString();
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else if (key == "author")
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mAuthor = parseString();
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else if (key == "glsl_version")
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{
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int version = parseInteger();
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if (mUBO && version > 330)
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mGLSLVersion = version;
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}
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else if (key == "flags")
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mFlags = parseFlags();
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else if (key == "hdr")
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mHDR = parseBool();
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else if (key == "pass_normals")
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mNormals = parseBool() && mSupportsNormals;
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else if (key == "pass_lights")
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mLights = parseBool();
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else if (key == "glsl_profile")
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{
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expect<Lexer::String>();
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mGLSLProfile = std::string(std::get<Lexer::String>(mToken).value);
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}
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else if (key == "glsl_extensions")
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{
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for (const auto& ext : parseLiteralList<Lexer::Comma>())
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mGLSLExtensions.emplace(ext);
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}
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else if (key == "dynamic")
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mDynamic = parseBool();
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else
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error(Misc::StringUtils::format("unexpected key '%s'", std::string{ key }));
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expect<Lexer::SemiColon>();
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}
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if (mPassKeys.empty())
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error("pass list in 'technique' block cannot be empty.");
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}
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template <>
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void Technique::parseBlockImp<Lexer::Render_Target>()
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{
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if (mRenderTargets.count(mBlockName))
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error(Misc::StringUtils::format("redeclaration of render target '%s'", std::string(mBlockName)));
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fx::Types::RenderTarget rt;
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rt.mTarget->setTextureSize(mWidth, mHeight);
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rt.mTarget->setSourceFormat(GL_RGB);
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rt.mTarget->setInternalFormat(GL_RGB);
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rt.mTarget->setSourceType(GL_UNSIGNED_BYTE);
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while (!isNext<Lexer::Close_bracket>() && !isNext<Lexer::Eof>())
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{
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expect<Lexer::Literal>();
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auto key = std::get<Lexer::Literal>(mToken).value;
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expect<Lexer::Equal>();
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if (key == "min_filter")
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rt.mTarget->setFilter(osg::Texture2D::MIN_FILTER, parseFilterMode());
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else if (key == "mag_filter")
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rt.mTarget->setFilter(osg::Texture2D::MAG_FILTER, parseFilterMode());
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else if (key == "wrap_s")
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rt.mTarget->setWrap(osg::Texture2D::WRAP_S, parseWrapMode());
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else if (key == "wrap_t")
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rt.mTarget->setWrap(osg::Texture2D::WRAP_T, parseWrapMode());
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else if (key == "width_ratio")
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rt.mSize.mWidthRatio = parseFloat();
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else if (key == "height_ratio")
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rt.mSize.mHeightRatio = parseFloat();
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else if (key == "width")
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rt.mSize.mWidth = parseInteger();
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else if (key == "height")
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rt.mSize.mHeight = parseInteger();
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else if (key == "internal_format")
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rt.mTarget->setInternalFormat(parseInternalFormat());
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else if (key == "source_type")
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rt.mTarget->setSourceType(parseSourceType());
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else if (key == "source_format")
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rt.mTarget->setSourceFormat(parseSourceFormat());
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else if (key == "mipmaps")
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rt.mMipMap = parseBool();
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else
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error(Misc::StringUtils::format("unexpected key '%s'", std::string(key)));
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expect<Lexer::SemiColon>();
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}
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mRenderTargets.emplace(mBlockName, std::move(rt));
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}
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template <>
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void Technique::parseBlockImp<Lexer::Vertex>()
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{
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if (!mLexer->jump())
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error(Misc::StringUtils::format("unterminated 'vertex' block, expected closing brackets"));
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auto& pass = mPassMap[mBlockName];
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if (!pass)
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pass = std::make_shared<fx::Pass>();
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pass->mName = mBlockName;
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if (pass->mCompute)
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error(Misc::StringUtils::format("'compute' block already defined. Usage is ambiguous."));
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else if (!pass->mVertex)
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pass->mVertex = new osg::Shader(osg::Shader::VERTEX, getBlockWithLineDirective());
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else
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error(Misc::StringUtils::format("duplicate vertex shader for block '%s'", std::string(mBlockName)));
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pass->mType = Pass::Type::Pixel;
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}
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template <>
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void Technique::parseBlockImp<Lexer::Fragment>()
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{
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if (!mLexer->jump())
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error(Misc::StringUtils::format("unterminated 'fragment' block, expected closing brackets"));
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auto& pass = mPassMap[mBlockName];
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if (!pass)
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pass = std::make_shared<fx::Pass>();
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pass->mUBO = mUBO;
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pass->mName = mBlockName;
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if (pass->mCompute)
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error(Misc::StringUtils::format("'compute' block already defined. Usage is ambiguous."));
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else if (!pass->mFragment)
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pass->mFragment = new osg::Shader(osg::Shader::FRAGMENT, getBlockWithLineDirective());
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else
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error(Misc::StringUtils::format("duplicate vertex shader for block '%s'", std::string(mBlockName)));
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pass->mType = Pass::Type::Pixel;
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}
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template <>
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void Technique::parseBlockImp<Lexer::Compute>()
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{
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if (!mLexer->jump())
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error(Misc::StringUtils::format("unterminated 'compute' block, expected closing brackets"));
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auto& pass = mPassMap[mBlockName];
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if (!pass)
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pass = std::make_shared<fx::Pass>();
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pass->mName = mBlockName;
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if (pass->mFragment)
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error(Misc::StringUtils::format("'fragment' block already defined. Usage is ambiguous."));
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else if (pass->mVertex)
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error(Misc::StringUtils::format("'vertex' block already defined. Usage is ambiguous."));
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else if (!pass->mFragment)
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pass->mCompute = new osg::Shader(osg::Shader::COMPUTE, getBlockWithLineDirective());
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else
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error(Misc::StringUtils::format("duplicate vertex shader for block '%s'", std::string(mBlockName)));
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pass->mType = Pass::Type::Compute;
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}
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template <class T>
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void Technique::parseSampler()
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{
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if (findUniform(std::string(mBlockName)) != mDefinedUniforms.end())
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error(Misc::StringUtils::format("redeclaration of uniform '%s'", std::string(mBlockName)));
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ProxyTextureData proxy;
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osg::ref_ptr<osg::Texture> sampler;
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constexpr bool is1D = std::is_same_v<Lexer::Sampler_1D, T>;
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constexpr bool is3D = std::is_same_v<Lexer::Sampler_3D, T>;
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Types::SamplerType type;
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while (!isNext<Lexer::Close_bracket>() && !isNext<Lexer::Eof>())
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{
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expect<Lexer::Literal>();
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auto key = asLiteral();
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expect<Lexer::Equal>();
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if (!is1D && key == "min_filter")
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proxy.min_filter = parseFilterMode();
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else if (!is1D && key == "mag_filter")
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proxy.mag_filter = parseFilterMode();
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else if (key == "wrap_s")
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proxy.wrap_s = parseWrapMode();
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else if (key == "wrap_t")
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proxy.wrap_t = parseWrapMode();
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else if (is3D && key == "wrap_r")
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proxy.wrap_r = parseWrapMode();
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else if (key == "compression")
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proxy.compression = parseCompression();
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else if (key == "source_type")
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proxy.source_type = parseSourceType();
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else if (key == "source_format")
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proxy.source_format = parseSourceFormat();
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else if (key == "internal_format")
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proxy.internal_format = parseInternalFormat();
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else if (key == "source")
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{
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expect<Lexer::String>();
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auto image = mImageManager.getImage(std::string{ std::get<Lexer::String>(mToken).value }, is3D);
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if constexpr (is1D)
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{
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type = Types::SamplerType::Texture_1D;
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sampler = new osg::Texture1D(image);
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}
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else if constexpr (is3D)
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{
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type = Types::SamplerType::Texture_3D;
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sampler = new osg::Texture3D(image);
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}
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else
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{
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type = Types::SamplerType::Texture_2D;
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sampler = new osg::Texture2D(image);
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}
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}
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else
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error(Misc::StringUtils::format("unexpected key '%s'", std::string{ key }));
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expect<Lexer::SemiColon>();
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}
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if (!sampler)
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error(Misc::StringUtils::format(
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"%s '%s' requires a filename", std::string(T::repr), std::string{ mBlockName }));
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if (!is1D)
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{
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sampler->setFilter(osg::Texture::MIN_FILTER, proxy.min_filter);
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sampler->setFilter(osg::Texture::MAG_FILTER, proxy.mag_filter);
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}
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if (is3D)
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sampler->setWrap(osg::Texture::WRAP_R, proxy.wrap_r);
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sampler->setWrap(osg::Texture::WRAP_S, proxy.wrap_s);
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sampler->setWrap(osg::Texture::WRAP_T, proxy.wrap_t);
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sampler->setInternalFormatMode(proxy.compression);
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if (proxy.internal_format.has_value())
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sampler->setInternalFormat(proxy.internal_format.value());
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if (proxy.source_type.has_value())
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sampler->setSourceType(proxy.source_type.value());
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if (proxy.internal_format.has_value())
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sampler->setSourceFormat(proxy.internal_format.value());
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sampler->setName(std::string{ mBlockName });
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sampler->setResizeNonPowerOfTwoHint(false);
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mTextures.emplace_back(sampler);
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std::shared_ptr<Types::UniformBase> uniform = std::make_shared<Types::UniformBase>();
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uniform->mSamplerType = type;
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uniform->mName = std::string(mBlockName);
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mDefinedUniforms.emplace_back(std::move(uniform));
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}
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template <class SrcT, class T>
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void Technique::parseUniform()
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{
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if (findUniform(std::string(mBlockName)) != mDefinedUniforms.end())
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error(Misc::StringUtils::format("redeclaration of uniform '%s'", std::string(mBlockName)));
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std::shared_ptr<Types::UniformBase> uniform = std::make_shared<Types::UniformBase>();
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Types::Uniform<SrcT> data = Types::Uniform<SrcT>();
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while (!isNext<Lexer::Close_bracket>() && !isNext<Lexer::Eof>())
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{
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expect<Lexer::Literal>();
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auto key = asLiteral();
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expect<Lexer::Equal>("error parsing config for uniform block");
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|
|
constexpr bool isVec = std::is_same_v<osg::Vec2f,
|
|
SrcT> || std::is_same_v<osg::Vec3f, SrcT> || std::is_same_v<osg::Vec4f, SrcT>;
|
|
constexpr bool isFloat = std::is_same_v<float, SrcT>;
|
|
constexpr bool isInt = std::is_same_v<int, SrcT>;
|
|
constexpr bool isBool = std::is_same_v<bool, SrcT>;
|
|
|
|
static_assert(isVec || isFloat || isInt || isBool, "Unsupported type");
|
|
|
|
if (key == "default")
|
|
{
|
|
if constexpr (isVec)
|
|
data.mDefault = parseVec<SrcT, T>();
|
|
else if constexpr (isFloat)
|
|
data.mDefault = parseFloat();
|
|
else if constexpr (isInt)
|
|
data.mDefault = parseInteger();
|
|
else if constexpr (isBool)
|
|
data.mDefault = parseBool();
|
|
}
|
|
else if (key == "size")
|
|
{
|
|
if constexpr (isBool)
|
|
error("bool arrays currently unsupported");
|
|
|
|
int size = parseInteger();
|
|
if (size > 1)
|
|
data.mArray = std::vector<SrcT>(size);
|
|
}
|
|
else if (key == "min")
|
|
{
|
|
if constexpr (isVec)
|
|
data.mMin = parseVec<SrcT, T>();
|
|
else if constexpr (isFloat)
|
|
data.mMin = parseFloat();
|
|
else if constexpr (isInt)
|
|
data.mMin = parseInteger();
|
|
else if constexpr (isBool)
|
|
data.mMin = parseBool();
|
|
}
|
|
else if (key == "max")
|
|
{
|
|
if constexpr (isVec)
|
|
data.mMax = parseVec<SrcT, T>();
|
|
else if constexpr (isFloat)
|
|
data.mMax = parseFloat();
|
|
else if constexpr (isInt)
|
|
data.mMax = parseInteger();
|
|
else if constexpr (isBool)
|
|
data.mMax = parseBool();
|
|
}
|
|
else if (key == "step")
|
|
uniform->mStep = parseFloat();
|
|
else if (key == "static")
|
|
uniform->mStatic = parseBool();
|
|
else if (key == "description")
|
|
{
|
|
expect<Lexer::String>();
|
|
uniform->mDescription = std::get<Lexer::String>(mToken).value;
|
|
}
|
|
else if (key == "header")
|
|
{
|
|
expect<Lexer::String>();
|
|
uniform->mHeader = std::get<Lexer::String>(mToken).value;
|
|
}
|
|
else if (key == "display_name")
|
|
{
|
|
expect<Lexer::String>();
|
|
uniform->mDisplayName = std::get<Lexer::String>(mToken).value;
|
|
}
|
|
else
|
|
error(Misc::StringUtils::format("unexpected key '%s'", std::string{ key }));
|
|
|
|
expect<Lexer::SemiColon>();
|
|
}
|
|
|
|
if (data.isArray())
|
|
uniform->mStatic = false;
|
|
|
|
uniform->mName = std::string(mBlockName);
|
|
uniform->mData = data;
|
|
uniform->mTechniqueName = mName;
|
|
|
|
if (data.mArray)
|
|
{
|
|
if constexpr (!std::is_same_v<bool, SrcT>)
|
|
{
|
|
if (auto cached = Settings::ShaderManager::get().getValue<std::vector<SrcT>>(mName, uniform->mName))
|
|
uniform->setValue(cached.value());
|
|
}
|
|
}
|
|
else if (auto cached = Settings::ShaderManager::get().getValue<SrcT>(mName, uniform->mName))
|
|
{
|
|
uniform->setValue(cached.value());
|
|
}
|
|
|
|
mDefinedUniforms.emplace_back(std::move(uniform));
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Sampler_1D>()
|
|
{
|
|
parseSampler<Lexer::Sampler_1D>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Sampler_2D>()
|
|
{
|
|
parseSampler<Lexer::Sampler_2D>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Sampler_3D>()
|
|
{
|
|
parseSampler<Lexer::Sampler_3D>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Uniform_Bool>()
|
|
{
|
|
parseUniform<bool, bool>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Uniform_Float>()
|
|
{
|
|
parseUniform<float, float>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Uniform_Int>()
|
|
{
|
|
parseUniform<int, int>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Uniform_Vec2>()
|
|
{
|
|
parseUniform<osg::Vec2f, Lexer::Vec2>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Uniform_Vec3>()
|
|
{
|
|
parseUniform<osg::Vec3f, Lexer::Vec3>();
|
|
}
|
|
|
|
template <>
|
|
void Technique::parseBlockImp<Lexer::Uniform_Vec4>()
|
|
{
|
|
parseUniform<osg::Vec4f, Lexer::Vec4>();
|
|
}
|
|
|
|
template <class T>
|
|
void Technique::expect(const std::string& err)
|
|
{
|
|
mToken = mLexer->next();
|
|
if (!std::holds_alternative<T>(mToken))
|
|
{
|
|
if (err.empty())
|
|
error(Misc::StringUtils::format("Expected %s", std::string(T::repr)));
|
|
else
|
|
error(Misc::StringUtils::format("%s. Expected %s", err, std::string(T::repr)));
|
|
}
|
|
}
|
|
|
|
template <class T, class T2>
|
|
void Technique::expect(const std::string& err)
|
|
{
|
|
mToken = mLexer->next();
|
|
if (!std::holds_alternative<T>(mToken) && !std::holds_alternative<T2>(mToken))
|
|
{
|
|
if (err.empty())
|
|
error(Misc::StringUtils::format(
|
|
"%s. Expected %s or %s", err, std::string(T::repr), std::string(T2::repr)));
|
|
else
|
|
error(Misc::StringUtils::format("Expected %s or %s", std::string(T::repr), std::string(T2::repr)));
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
bool Technique::isNext()
|
|
{
|
|
return std::holds_alternative<T>(mLexer->peek());
|
|
}
|
|
|
|
void Technique::parse(std::string&& buffer)
|
|
{
|
|
mBuffer = std::move(buffer);
|
|
Misc::StringUtils::replaceAll(mBuffer, "\r\n", "\n");
|
|
mLexer = std::make_unique<Lexer::Lexer>(mBuffer);
|
|
|
|
for (auto t = mLexer->next(); !std::holds_alternative<Lexer::Eof>(t); t = mLexer->next())
|
|
{
|
|
std::visit(
|
|
[this](auto&& arg) {
|
|
using T = std::decay_t<decltype(arg)>;
|
|
|
|
if constexpr (std::is_same_v<Lexer::Shared, T>)
|
|
parseBlock<Lexer::Shared>(false);
|
|
else if constexpr (std::is_same_v<Lexer::Technique, T>)
|
|
parseBlock<Lexer::Technique>(false);
|
|
else if constexpr (std::is_same_v<Lexer::Render_Target, T>)
|
|
parseBlock<Lexer::Render_Target>();
|
|
else if constexpr (std::is_same_v<Lexer::Vertex, T>)
|
|
parseBlock<Lexer::Vertex>();
|
|
else if constexpr (std::is_same_v<Lexer::Fragment, T>)
|
|
parseBlock<Lexer::Fragment>();
|
|
else if constexpr (std::is_same_v<Lexer::Compute, T>)
|
|
parseBlock<Lexer::Compute>();
|
|
else if constexpr (std::is_same_v<Lexer::Sampler_1D, T>)
|
|
parseBlock<Lexer::Sampler_1D>();
|
|
else if constexpr (std::is_same_v<Lexer::Sampler_2D, T>)
|
|
parseBlock<Lexer::Sampler_2D>();
|
|
else if constexpr (std::is_same_v<Lexer::Sampler_3D, T>)
|
|
parseBlock<Lexer::Sampler_3D>();
|
|
else if constexpr (std::is_same_v<Lexer::Uniform_Bool, T>)
|
|
parseBlock<Lexer::Uniform_Bool>();
|
|
else if constexpr (std::is_same_v<Lexer::Uniform_Float, T>)
|
|
parseBlock<Lexer::Uniform_Float>();
|
|
else if constexpr (std::is_same_v<Lexer::Uniform_Int, T>)
|
|
parseBlock<Lexer::Uniform_Int>();
|
|
else if constexpr (std::is_same_v<Lexer::Uniform_Vec2, T>)
|
|
parseBlock<Lexer::Uniform_Vec2>();
|
|
else if constexpr (std::is_same_v<Lexer::Uniform_Vec3, T>)
|
|
parseBlock<Lexer::Uniform_Vec3>();
|
|
else if constexpr (std::is_same_v<Lexer::Uniform_Vec4, T>)
|
|
parseBlock<Lexer::Uniform_Vec4>();
|
|
else
|
|
error("invalid top level block");
|
|
},
|
|
t);
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
void Technique::parseBlock(bool named)
|
|
{
|
|
mBlockName = T::repr;
|
|
|
|
if (named)
|
|
{
|
|
expect<Lexer::Literal>("name is required for preceeding block decleration");
|
|
|
|
mBlockName = std::get<Lexer::Literal>(mToken).value;
|
|
|
|
if (isNext<Lexer::Open_Parenthesis>())
|
|
parseBlockHeader();
|
|
}
|
|
|
|
expect<Lexer::Open_bracket>();
|
|
|
|
parseBlockImp<T>();
|
|
|
|
expect<Lexer::Close_bracket>();
|
|
}
|
|
|
|
template <class TDelimeter>
|
|
std::vector<std::string_view> Technique::parseLiteralList()
|
|
{
|
|
std::vector<std::string_view> data;
|
|
|
|
while (!isNext<Lexer::Eof>())
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
data.emplace_back(std::get<Lexer::Literal>(mToken).value);
|
|
|
|
if (!isNext<TDelimeter>())
|
|
break;
|
|
|
|
mLexer->next();
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
void Technique::parseBlockHeader()
|
|
{
|
|
expect<Lexer::Open_Parenthesis>();
|
|
|
|
if (isNext<Lexer::Close_Parenthesis>())
|
|
{
|
|
mLexer->next();
|
|
return;
|
|
}
|
|
|
|
auto& pass = mPassMap[mBlockName];
|
|
|
|
if (!pass)
|
|
pass = std::make_shared<fx::Pass>();
|
|
|
|
bool clear = true;
|
|
osg::Vec4f clearColor = { 1, 1, 1, 1 };
|
|
|
|
while (!isNext<Lexer::Eof>())
|
|
{
|
|
expect<Lexer::Literal>("invalid key in block header");
|
|
|
|
std::string_view key = std::get<Lexer::Literal>(mToken).value;
|
|
|
|
expect<Lexer::Equal>();
|
|
|
|
if (key == "target")
|
|
{
|
|
expect<Lexer::Literal>();
|
|
pass->mTarget = std::get<Lexer::Literal>(mToken).value;
|
|
}
|
|
else if (key == "rt1")
|
|
{
|
|
expect<Lexer::Literal>();
|
|
pass->mRenderTargets[0] = std::get<Lexer::Literal>(mToken).value;
|
|
}
|
|
else if (key == "rt2")
|
|
{
|
|
expect<Lexer::Literal>();
|
|
pass->mRenderTargets[1] = std::get<Lexer::Literal>(mToken).value;
|
|
}
|
|
else if (key == "rt3")
|
|
{
|
|
expect<Lexer::Literal>();
|
|
pass->mRenderTargets[2] = std::get<Lexer::Literal>(mToken).value;
|
|
}
|
|
else if (key == "blend")
|
|
{
|
|
expect<Lexer::Open_Parenthesis>();
|
|
osg::BlendEquation::Equation blendEq = parseBlendEquation();
|
|
expect<Lexer::Comma>();
|
|
osg::BlendFunc::BlendFuncMode blendSrc = parseBlendFuncMode();
|
|
expect<Lexer::Comma>();
|
|
osg::BlendFunc::BlendFuncMode blendDest = parseBlendFuncMode();
|
|
expect<Lexer::Close_Parenthesis>();
|
|
|
|
pass->mBlendSource = blendSrc;
|
|
pass->mBlendDest = blendDest;
|
|
if (blendEq != osg::BlendEquation::FUNC_ADD)
|
|
pass->mBlendEq = blendEq;
|
|
}
|
|
else if (key == "clear")
|
|
clear = parseBool();
|
|
else if (key == "clear_color")
|
|
clearColor = parseVec<osg::Vec4f, Lexer::Vec4>();
|
|
else
|
|
error(Misc::StringUtils::format("unrecognized key '%s' in block header", std::string(key)));
|
|
|
|
mToken = mLexer->next();
|
|
|
|
if (std::holds_alternative<Lexer::Comma>(mToken))
|
|
{
|
|
if (std::holds_alternative<Lexer::Close_Parenthesis>(mLexer->peek()))
|
|
error(Misc::StringUtils::format("leading comma in '%s' is not allowed", std::string(mBlockName)));
|
|
else
|
|
continue;
|
|
}
|
|
|
|
if (std::holds_alternative<Lexer::Close_Parenthesis>(mToken))
|
|
return;
|
|
}
|
|
|
|
if (clear)
|
|
pass->mClearColor = clearColor;
|
|
|
|
error("malformed block header");
|
|
}
|
|
|
|
std::string_view Technique::asLiteral() const
|
|
{
|
|
return std::get<Lexer::Literal>(mToken).value;
|
|
}
|
|
|
|
FlagsType Technique::parseFlags()
|
|
{
|
|
auto parseBit = [this](std::string_view term) {
|
|
for (const auto& [identifer, bit] : constants::TechniqueFlag)
|
|
{
|
|
if (Misc::StringUtils::ciEqual(term, identifer))
|
|
return bit;
|
|
}
|
|
error(Misc::StringUtils::format("unrecognized flag '%s'", std::string(term)));
|
|
};
|
|
|
|
FlagsType flag = 0;
|
|
for (const auto& bit : parseLiteralList<Lexer::Comma>())
|
|
flag |= parseBit(bit);
|
|
|
|
return flag;
|
|
}
|
|
|
|
osg::Texture::FilterMode Technique::parseFilterMode()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::FilterMode)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized filter mode '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
osg::Texture::WrapMode Technique::parseWrapMode()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::WrapMode)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized wrap mode '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
osg::Texture::InternalFormatMode Technique::parseCompression()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::Compression)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized compression '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
int Technique::parseInternalFormat()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::InternalFormat)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized internal format '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
int Technique::parseSourceType()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::SourceType)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized source type '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
int Technique::parseSourceFormat()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::SourceFormat)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized source format '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
osg::BlendEquation::Equation Technique::parseBlendEquation()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::BlendEquation)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized blend equation '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
osg::BlendFunc::BlendFuncMode Technique::parseBlendFuncMode()
|
|
{
|
|
expect<Lexer::Literal>();
|
|
|
|
for (const auto& [identifer, mode] : constants::BlendFunc)
|
|
{
|
|
if (asLiteral() == identifer)
|
|
return mode;
|
|
}
|
|
|
|
error(Misc::StringUtils::format("unrecognized blend function '%s'", std::string{ asLiteral() }));
|
|
}
|
|
|
|
bool Technique::parseBool()
|
|
{
|
|
mToken = mLexer->next();
|
|
|
|
if (std::holds_alternative<Lexer::True>(mToken))
|
|
return true;
|
|
if (std::holds_alternative<Lexer::False>(mToken))
|
|
return false;
|
|
|
|
error("expected 'true' or 'false' as boolean value");
|
|
}
|
|
|
|
std::string_view Technique::parseString()
|
|
{
|
|
expect<Lexer::String>();
|
|
|
|
return std::get<Lexer::String>(mToken).value;
|
|
}
|
|
|
|
float Technique::parseFloat()
|
|
{
|
|
mToken = mLexer->next();
|
|
|
|
if (std::holds_alternative<Lexer::Float>(mToken))
|
|
return std::get<Lexer::Float>(mToken).value;
|
|
if (std::holds_alternative<Lexer::Integer>(mToken))
|
|
return static_cast<float>(std::get<Lexer::Integer>(mToken).value);
|
|
|
|
error("expected float value");
|
|
}
|
|
|
|
int Technique::parseInteger()
|
|
{
|
|
expect<Lexer::Integer>();
|
|
|
|
return std::get<Lexer::Integer>(mToken).value;
|
|
}
|
|
|
|
template <class OSGVec, class T>
|
|
OSGVec Technique::parseVec()
|
|
{
|
|
expect<T>();
|
|
expect<Lexer::Open_Parenthesis>();
|
|
|
|
OSGVec value;
|
|
|
|
for (int i = 0; i < OSGVec::num_components; ++i)
|
|
{
|
|
value[i] = parseFloat();
|
|
|
|
if (i < OSGVec::num_components - 1)
|
|
expect<Lexer::Comma>();
|
|
}
|
|
|
|
expect<Lexer::Close_Parenthesis>("check definition of the vector");
|
|
|
|
return value;
|
|
}
|
|
}
|