Mercurial > hg > orthanc-stone
diff Framework/OpenGL/OpenGLProgram.cpp @ 579:fadacfbf5538
OpenGL programs and textures
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 19 Apr 2019 16:06:45 +0200 |
parents | |
children | 1091b2adeb5a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/OpenGL/OpenGLProgram.cpp Fri Apr 19 16:06:45 2019 +0200 @@ -0,0 +1,103 @@ +/** + * Stone of Orthanc + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2019 Osimis S.A., Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU Affero General Public License + * as published by the Free Software Foundation, either version 3 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#include "OpenGLProgram.h" + +#include "OpenGLShader.h" + +#include <Core/OrthancException.h> + + +namespace OrthancStone +{ + namespace OpenGL + { + OpenGLProgram::OpenGLProgram() + { + program_ = glCreateProgram(); + if (program_ == 0) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, + "Cannot create an OpenGL program"); + } + } + + + OpenGLProgram::~OpenGLProgram() + { + assert(program_ != 0); + glDeleteProgram(program_); + } + + + void OpenGLProgram::Use() + { + glUseProgram(program_); + } + + + void OpenGLProgram::CompileShaders(const std::string& vertexCode, + const std::string& fragmentCode) + { + assert(program_ != 0); + + OpenGLShader vertexShader(GL_VERTEX_SHADER, vertexCode); + OpenGLShader fragmentShader(GL_FRAGMENT_SHADER, fragmentCode); + + glAttachShader(program_, vertexShader.Release()); + glAttachShader(program_, fragmentShader.Release()); + glLinkProgram(program_); + glValidateProgram(program_); + } + + + GLint OpenGLProgram::GetUniformLocation(const std::string& name) + { + GLint location = glGetUniformLocation(program_, name.c_str()); + + if (location == -1) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem, + "Inexistent uniform variable in shader: " + name); + } + else + { + return location; + } + } + + + GLint OpenGLProgram::GetAttributeLocation(const std::string& name) + { + GLint location = glGetAttribLocation(program_, name.c_str()); + + if (location == -1) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem, + "Inexistent attribute in shader: " + name); + } + else + { + return location; + } + } + } +}