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/* |
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* The ManaPlus Client |
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* Copyright (C) 2014-2019 The ManaPlus Developers |
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* Copyright (C) 2019-2021 Andrei Karas |
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* |
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* This file is part of The ManaPlus Client. |
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* |
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* This program 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 2 of the License, or |
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* any later version. |
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* |
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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#include "render/shaders/shadersmanager.h" |
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#ifdef USE_OPENGL |
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#include "configuration.h" |
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#include "logger.h" |
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#include "fs/virtfs/tools.h" |
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#include "utils/cast.h" |
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#include "render/opengl/mgl.h" |
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#ifdef __native_client__ |
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#include "render/opengl/naclglfunctions.h" |
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#endif // __native_client__ |
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#include "render/shaders/shader.h" |
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#include "render/shaders/shaderprogram.h" |
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#include "resources/loaders/shaderloader.h" |
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#include "debug.h" |
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ShadersManager shaders; |
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Shader *ShadersManager::createShader(const unsigned int type, |
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const std::string &fileName) |
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{ |
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const std::string str = VirtFs::loadTextFileString(fileName); |
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const char *ptrStr = str.c_str(); |
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GLuint shaderId = mglCreateShader(type); |
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mglShaderSource(shaderId, 1, &ptrStr, nullptr); |
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mglCompileShader(shaderId); |
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GLint isCompiled = 0; |
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mglGetShaderiv(shaderId, GL_COMPILE_STATUS, &isCompiled); |
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if (isCompiled == GL_TRUE) |
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return new Shader(shaderId); |
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GLint len = 0; |
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mglGetShaderiv(shaderId, GL_INFO_LOG_LENGTH, &len); |
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char *buf = new char[CAST_SIZE(len) + 1]; |
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mglGetShaderInfoLog(shaderId, len, &len, buf); |
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buf[len] = 0; |
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logger->log("Shader '%s' compilation error: %s", fileName.c_str(), buf); |
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delete [] buf; |
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mglDeleteShader(shaderId); |
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return nullptr; |
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} |
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ShaderProgram *ShadersManager::createProgram(const std::string &vertex, |
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const std::string &fragment, |
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const bool isNewShader) |
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{ |
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Shader *const vertexShader = static_cast<Shader*>( |
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Loader::getShader(GL_VERTEX_SHADER, vertex)); |
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if (vertexShader == nullptr) |
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return nullptr; |
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Shader *const fragmentShader = static_cast<Shader*>( |
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Loader::getShader(GL_FRAGMENT_SHADER, fragment)); |
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if (fragmentShader == nullptr) |
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{ |
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vertexShader->decRef(); |
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return nullptr; |
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} |
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GLuint programId = mglCreateProgram(); |
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if (programId == 0U) |
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{ |
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vertexShader->decRef(); |
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fragmentShader->decRef(); |
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return nullptr; |
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} |
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mglAttachShader(programId, vertexShader->getShaderId()); |
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mglAttachShader(programId, fragmentShader->getShaderId()); |
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if (isNewShader) |
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mglBindFragDataLocation(programId, 0, "outColor"); |
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else |
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mglBindAttribLocation(programId, 0, "position"); |
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mglLinkProgram(programId); |
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GLint isLinked = 0; |
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mglGetProgramiv(programId, GL_LINK_STATUS, &isLinked); |
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if (isLinked == GL_TRUE) |
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{ |
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mglValidateProgram(programId); |
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GLint isValidated = 0; |
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mglGetProgramiv(programId, GL_VALIDATE_STATUS, &isValidated); |
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if (isValidated == GL_TRUE) |
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return new ShaderProgram(programId, vertexShader, fragmentShader); |
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mglDeleteProgram(programId); |
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return nullptr; |
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} |
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GLint len = 0; |
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mglGetProgramiv(programId, GL_INFO_LOG_LENGTH, &len); |
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char *buf = new char[CAST_SIZE(len) + 1]; |
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mglGetProgramInfoLog(programId, len, &len, buf); |
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buf[len] = 0; |
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logger->log("Program '%s, %s' compilation error: %s", |
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vertexShader->mIdPath.c_str(), |
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fragmentShader->mIdPath.c_str(), |
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buf); |
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delete [] buf; |
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mglDeleteProgram(programId); |
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return nullptr; |
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} |
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ShaderProgram *ShadersManager::getSimpleProgram() |
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{ |
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const std::string dir = paths.getStringValue("shaders"); |
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return createProgram(dir + paths.getStringValue("simpleVertexShader"), |
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dir + paths.getStringValue("simpleFragmentShader"), |
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true); |
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} |
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ShaderProgram *ShadersManager::getGles2Program() |
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{ |
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const std::string dir = paths.getStringValue("shaders"); |
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return createProgram(dir + paths.getStringValue("gles2VertexShader"), |
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dir + paths.getStringValue("gles2FragmentShader"), |
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false); |
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} |
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#endif // USE_OPENGL |