Mercurial > hg > orthanc-stone
view OrthancStone/Sources/OpenGL/OpenGLTexture.cpp @ 2146:743fa9c74443 dicom-sr tip
integration mainline->dicom-sr
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 16 Aug 2024 18:09:53 +0200 |
parents | 16c01cc201e7 |
children | 2e050ec85379 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2023 Osimis S.A., Belgium * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #include "OpenGLTexture.h" #include "IOpenGLContext.h" #include <Logging.h> #include <OrthancException.h> #include <cassert> namespace OrthancStone { namespace OpenGL { OpenGLTexture::OpenGLTexture(OpenGL::IOpenGLContext& context) : width_(0) , height_(0) , context_(context) { if (!context_.IsContextLost()) { // Generate a texture object glGenTextures(1, &texture_); if (texture_ == 0) { throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, "Cannot create an OpenGL program"); } } } OpenGLTexture::~OpenGLTexture() { try { if (!context_.IsContextLost()) { assert(texture_ != 0); ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteTextures"); glDeleteTextures(1, &texture_); } } catch (const Orthanc::OrthancException& e) { if (e.HasDetails()) { LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What() << " Details: " << e.GetDetails(); } else { LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What(); } } catch (const std::exception& e) { LOG(ERROR) << "std::exception in ~OpenGLTexture: " << e.what(); } catch (...) { LOG(ERROR) << "Unknown exception in ~OpenGLTexture"; } } void OpenGLTexture::Load(const Orthanc::ImageAccessor& image, bool isLinearInterpolation) { if (!context_.IsContextLost()) { glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Disable byte-alignment restriction if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth()) { throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "Unsupported non-zero padding"); } // Bind it glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture_); GLenum sourceFormat, internalFormat; switch (image.GetFormat()) { case Orthanc::PixelFormat_Grayscale8: sourceFormat = GL_RED; internalFormat = GL_RED; break; case Orthanc::PixelFormat_RGB24: sourceFormat = GL_RGB; internalFormat = GL_RGB; break; case Orthanc::PixelFormat_RGBA32: sourceFormat = GL_RGBA; internalFormat = GL_RGBA; break; default: throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "No support for this format in OpenGL textures: " + std::string(EnumerationToString(image.GetFormat()))); } width_ = image.GetWidth(); height_ = image.GetHeight(); GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST); // Load the texture from the image buffer glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, image.GetWidth(), image.GetHeight(), 0, sourceFormat, GL_UNSIGNED_BYTE, image.GetConstBuffer()); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, interpolation); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, interpolation); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); } } void OpenGLTexture::Bind(GLint location) { glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture_); glUniform1i(location, 0 /* texture unit */); } } }