Mercurial > hg > orthanc-stone
diff Framework/OpenGL/OpenGLShader.cpp @ 578:21fd70df3fc9
starting work on OpenGL
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 19 Apr 2019 15:57:46 +0200 |
parents | |
children | fadacfbf5538 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/OpenGL/OpenGLShader.cpp Fri Apr 19 15:57:46 2019 +0200 @@ -0,0 +1,114 @@ +/** + * 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 "OpenGLShader.h" + +#include <Core/OrthancException.h> + +namespace OrthancStone +{ + namespace OpenGL + { + static GLuint CompileShader(GLenum type, + const std::string& source) + { + // Create shader object + const GLchar* sourceString[1]; + GLint sourceStringLengths[1]; + + sourceString[0] = source.c_str(); + sourceStringLengths[0] = source.length(); + GLuint shader = glCreateShader(type); + + if (shader == 0) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, + "Cannot create an OpenGL shader"); + } + else + { + // Assign and compile the source to the shader object + glShaderSource(shader, 1, sourceString, sourceStringLengths); + glCompileShader(shader); + + // Check if there were errors + int infoLen = 0; + glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen); + + if (infoLen > 1) + { + char infoLog[infoLen + 1]; + glGetShaderInfoLog(shader, infoLen, NULL, infoLog); + glDeleteShader(shader); + + throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, + "Error while creating an OpenGL shader: " + std::string(infoLog)); + } + else + { + return shader; + } + } + } + + + OpenGLShader::OpenGLShader(GLenum type, + const std::string& source) + { + shader_ = CompileShader(type, source); + isValid_ = true; + } + + + OpenGLShader::OpenGLShader(GLenum type, + Orthanc::EmbeddedResources::FileResourceId resource) + { + std::string content; + Orthanc::EmbeddedResources::GetFileResource(content, resource); + + shader_ = CompileShader(type, content); + isValid_ = true; + } + + + OpenGLShader::~OpenGLShader() + { + if (isValid_) + { + glDeleteShader(shader_); + } + } + + + GLuint OpenGLShader::Release() + { + if (isValid_) + { + isValid_ = false; + return shader_; + } + else + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); + } + } + } +}