💿🐜 Antkeeper source code
https://antkeeper.com
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464 lines
13 KiB
464 lines
13 KiB
/*
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* Copyright (C) 2017-2019 Christopher J. Howard
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*
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* This file is part of Antkeeper Source Code.
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*
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* Antkeeper Source Code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper Source Code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper Source Code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "resource-loader.hpp"
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#include "resource-manager.hpp"
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#include <algorithm>
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#include <stdexcept>
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#include <sstream>
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#include <vector>
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#include <emergent/emergent.hpp>
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using namespace Emergent;
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static bool loadShaderInt(ShaderInt* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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int value;
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std::stringstream stream;
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stream << elements[i][0];
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stream >> value;
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderFloat(ShaderFloat* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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float value;
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std::stringstream stream;
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stream << elements[i][0];
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stream >> value;
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderVector2(ShaderVector2* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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Vector2 value;
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for (int j = 0; j < 2; ++j)
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{
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std::stringstream stream;
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stream << elements[i][j];
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stream >> value[j];
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}
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderVector3(ShaderVector3* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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Vector3 value;
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for (int j = 0; j < 3; ++j)
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{
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std::stringstream stream;
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stream << elements[i][j];
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stream >> value[j];
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}
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderVector4(ShaderVector4* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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Vector4 value;
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for (int j = 0; j < 4; ++j)
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{
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std::stringstream stream;
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stream << elements[i][j];
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stream >> value[j];
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}
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderMatrix3(ShaderMatrix3* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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Matrix3 value;
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for (int j = 0; j < 3; ++j)
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{
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for (int k = 0; k < 3; ++k)
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{
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std::stringstream stream;
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stream << elements[i][k * 3 + j];
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stream >> value[j][k];
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}
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}
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderMatrix4(ShaderMatrix4* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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Matrix4 value;
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for (int j = 0; j < 4; ++j)
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{
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for (int k = 0; k < 4; ++k)
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{
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std::stringstream stream;
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stream << elements[i][k * 4 + j];
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stream >> value[j][k];
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}
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}
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderTexture2D(ResourceManager* resourceManager, ShaderTexture2D* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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std::string filename;
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std::stringstream stream;
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stream << elements[i][0];
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stream >> filename;
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Texture2D* value = resourceManager->load<Texture2D>(filename);
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variable->setValue(i, value);
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}
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return true;
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}
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static bool loadShaderTextureCube(ResourceManager* resourceManager, ShaderTextureCube* variable, const std::vector<std::vector<std::string>>& elements)
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{
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for (int i = 0; i < elements.size(); ++i)
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{
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std::string filename;
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std::stringstream stream;
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stream << elements[i][0];
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stream >> filename;
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TextureCube* value = resourceManager->load<TextureCube>(filename);
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variable->setValue(i, value);
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}
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return true;
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}
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template <>
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Material* ResourceLoader<Material>::load(ResourceManager* resourceManager, std::istream* is)
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{
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// Allocate new material
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Material* material = new Material();
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std::string line;
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std::size_t lineNumber = 0;
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const std::string whitespace = " \t\r\n";
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// Parse lines
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while (is->good() && std::getline(*is, line))
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{
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if (is->bad() || is->fail())
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{
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break;
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}
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// Increment current line number
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++lineNumber;
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// Skip empty lines
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if (line.empty())
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{
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continue;
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}
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// Find position of first character in the command
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std::size_t commandPosition = line.find_first_not_of(whitespace, 0);
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if (commandPosition == std::string::npos)
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{
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// Skip whitespace-only lines
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continue;
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}
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// Determine command type
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std::string command = line.substr(commandPosition, line.find_first_of(" \t=", commandPosition) - commandPosition);
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// Parse command
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if (command == "shader" || command == "flags")
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{
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// Find position of equals sign
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std::size_t equalsSignPosition = line.find_first_of("=", commandPosition);
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if (equalsSignPosition == std::string::npos)
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{
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// Line has no equals sign
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Invalid line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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// Find position of first character in the value string
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std::size_t valueStartPosition = line.find_first_not_of(whitespace, equalsSignPosition + 1);
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if (valueStartPosition == std::string::npos)
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{
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// Line has no value
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Invalid line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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// Find position the end of the value string
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std::size_t valueEndPosition = line.find_first_of(" \t;\r\n", valueStartPosition);
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// Determine value string
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std::string valueString;
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if (valueEndPosition == std::string::npos)
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{
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valueString = line.substr(valueStartPosition);
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}
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else
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{
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valueString = line.substr(valueStartPosition, valueEndPosition - valueStartPosition);
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}
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// Execute command
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if (command == "shader")
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{
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// Load shader
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Shader* shader = nullptr;
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try
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{
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shader = resourceManager->load<Shader>(valueString);
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}
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catch (const std::exception& e)
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{
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std::string error = std::string("ResourceLoader<Material>::load(): Failed to load shader \"") + valueString + std::string("\": \"") + e.what() + std::string("\"");
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throw std::runtime_error(error.c_str());
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}
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material->setShader(shader);
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}
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else
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{
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// Parse flags
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std::uint64_t flags;
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std::stringstream stream;
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stream << valueString;
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stream >> flags;
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material->setFlags(flags);
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}
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}
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else if (command == "var")
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{
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// Find position of first character in variable name
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std::size_t variableNamePosition = line.find_first_not_of(whitespace, commandPosition + command.length());
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if (variableNamePosition == std::string::npos)
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{
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// Skip lines with no variable name
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Invalid variable on line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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// Find position of equals sign
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std::size_t equalsSignPosition = line.find_first_of("=", variableNamePosition);
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if (equalsSignPosition == std::string::npos)
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{
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// Skip lines with no equals sign
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Invalid variable on line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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// Find position of first character in variable type
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std::size_t variableTypePosition = line.find_first_not_of(whitespace, equalsSignPosition + 1);
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if (variableTypePosition == std::string::npos)
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{
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// Skip lines with no variable type definition
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Invalid variable on line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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// Count parentheses
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std::size_t leftParenthesisCount = std::count(line.begin() + variableNamePosition, line.end(), '(');
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std::size_t rightParenthesisCount = std::count(line.begin() + variableNamePosition, line.end(), ')');
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if (leftParenthesisCount != rightParenthesisCount || leftParenthesisCount == 0)
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{
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// Skip lines with invalid number of parentheses
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Invalid variable on line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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std::string variableName = line.substr(variableNamePosition, line.find_first_of(" \t=", variableNamePosition) - variableNamePosition);
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std::string variableType = line.substr(variableTypePosition, line.find_first_of(" \t[(", variableTypePosition) - variableTypePosition);
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std::size_t elementCount = leftParenthesisCount;
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std::size_t currentPosition = variableTypePosition;
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std::vector<std::vector<std::string>> elements;
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bool invalid = false;
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for (std::size_t i = 0; i < elementCount; ++i)
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{
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std::size_t leftParenthesisPosition = line.find_first_of("(", currentPosition);
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std::size_t rightParenthesisPosition = line.find_first_of(")", leftParenthesisPosition + 1);
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if (leftParenthesisPosition == std::string::npos || rightParenthesisPosition == std::string::npos)
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{
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invalid = true;
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break;
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}
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currentPosition = leftParenthesisPosition + 1;
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std::size_t argumentCount = std::count(line.begin() + leftParenthesisPosition + 1, line.begin() + rightParenthesisPosition, ',') + 1;
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std::vector<std::string> arguments;
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for (std::size_t j = 0; j < argumentCount; ++j)
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{
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std::size_t argumentStart = line.find_first_not_of(whitespace, currentPosition);
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std::size_t argumentEnd = line.find_first_of(" \t,)", argumentStart + 1);
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if (argumentStart == std::string::npos || argumentEnd == std::string::npos)
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{
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// Unable to parse argument
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invalid = true;
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break;
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}
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std::string argument = line.substr(argumentStart, argumentEnd - argumentStart);
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arguments.push_back(argument);
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currentPosition = argumentEnd + 1;
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}
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if (invalid)
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{
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Unable to parse element on line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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elements.push_back(arguments);
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currentPosition = rightParenthesisPosition + 1;
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}
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if (invalid)
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{
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// Unable to parse line
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Unable to parse line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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if (variableType == "int")
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{
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ShaderInt* variable = material->addVariable<int>(variableName, elements.size());
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loadShaderInt(variable, elements);
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}
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else if (variableType == "float")
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{
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ShaderFloat* variable = material->addVariable<float>(variableName, elements.size());
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loadShaderFloat(variable, elements);
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}
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else if (variableType == "vec2")
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{
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ShaderVector2* variable = material->addVariable<Vector2>(variableName, elements.size());
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loadShaderVector2(variable, elements);
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}
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else if (variableType == "vec3")
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{
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ShaderVector3* variable = material->addVariable<Vector3>(variableName, elements.size());
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loadShaderVector3(variable, elements);
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}
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else if (variableType == "vec4")
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{
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ShaderVector4* variable = material->addVariable<Vector4>(variableName, elements.size());
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loadShaderVector4(variable, elements);
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}
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else if (variableType == "mat3")
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{
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ShaderMatrix3* variable = material->addVariable<Matrix3>(variableName, elements.size());
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loadShaderMatrix3(variable, elements);
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}
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else if (variableType == "mat4")
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{
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ShaderMatrix4* variable = material->addVariable<Matrix4>(variableName, elements.size());
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loadShaderMatrix4(variable, elements);
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}
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else if (variableType == "texture")
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{
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ShaderTexture2D* variable = material->addVariable<const Texture2D*>(variableName, elements.size());
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loadShaderTexture2D(resourceManager, variable, elements);
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}
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else if (variableType == "textureCube")
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{
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ShaderTextureCube* variable = material->addVariable<const TextureCube*>(variableName, elements.size());
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loadShaderTextureCube(resourceManager, variable, elements);
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}
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}
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else
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{
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if (command[0] == '#')
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{
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// Skip comments
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continue;
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}
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// Invalid command
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std::stringstream stream;
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stream << "ResourceLoader<Material>::load(): Invalid command \"" << command << "\" on line " << lineNumber << ".";
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throw std::runtime_error(stream.str().c_str());
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}
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}
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return material;
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}
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