Mercurial > hg > orthanc-stone
view OrthancStone/Sources/OpenGL/OpenGLTexture.cpp @ 2056:66c130af0d3c deep-learning
OpenGLTexture::SetClampingToZero() is not available in wasm
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 18 Apr 2023 15:18:36 +0200 |
parents | a05b03f45289 |
children | c0627145b441 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2022 Osimis S.A., Belgium * Copyright (C) 2021-2022 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 <Images/Image.h> #include <Logging.h> #include <OrthancException.h> #if defined(__EMSCRIPTEN__) # if !defined(ORTHANC_WEBGL2_HEAP_COMPAT) # error The macro ORTHANC_WEBGL2_HEAP_COMPAT must be defined # endif #endif namespace OrthancStone { namespace OpenGL { OpenGLTexture::OpenGLTexture(OpenGL::IOpenGLContext& context) : texture_(0), width_(0), height_(0), format_(Orthanc::PixelFormat_Grayscale8), context_(context) { if (!context_.IsContextLost()) { // Generate a texture object glGenTextures(1, &texture_); ORTHANC_OPENGL_CHECK("glGenTextures()"); if (texture_ == 0) { throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, "Cannot create an OpenGL texture"); } } } 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::Setup(Orthanc::PixelFormat format, unsigned int width, unsigned int height, bool isLinearInterpolation, const void* data) { if (context_.IsContextLost()) { throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, "OpenGL context has been lost"); } else { glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Disable byte-alignment restriction // Bind it glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture_); GLenum sourceFormat, internalFormat, pixelType; ConvertToOpenGLFormats(sourceFormat, internalFormat, pixelType, format); format_ = format; width_ = width; height_ = height; GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST); // Load the texture from the image buffer #if defined(__EMSCRIPTEN__) && (ORTHANC_WEBGL2_HEAP_COMPAT == 1) /** * This compatibility implementation seems to be necessary * with WebGL2, at least in Web workers. In such a situation, * the calls that are referred to as the "new garbage-free * entry points" in the Emscripten source file * "upstream/emscripten/src/library_webgl.js" seem to fail, * because the "Uint8Array" and "Float32Array" seem to be * incorrectly created. This compatibility reverts to the * WebGL1 behavior of "library_webgl.js", which requires the * function "emscriptenWebGLGetTexPixelData" that is defined * in "upstream/emscripten/src/library_webgl.js" to be * exported in the linker using option * "EXTRA_EXPORTED_RUNTIME_METHODS" or * "EXPORTED_RUNTIME_METHODS". **/ EM_ASM({ var ptr = $0 ? emscriptenWebGLGetTexPixelData($5, $4, $2, $3, $0, $1) : null; GLctx.texImage2D(GLctx.TEXTURE_2D, 0, $1, $2, $3, 0, $4, $5, ptr); }, data, // $0 internalFormat, // $1 width, // $2 height, // $3 sourceFormat, // $4 pixelType); // $5 #else glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, sourceFormat, pixelType, data); #endif ORTHANC_OPENGL_CHECK("glTexImage2D()"); #if !defined(__EMSCRIPTEN__) /** * glGetTexLevelParameteriv() was introduced in OpenGL ES 3.1, * but WebGL 2 only supports OpenGL ES 3.0, so it is not * available in WebAssembly: * https://registry.khronos.org/OpenGL-Refpages/es3.1/html/glGetTexLevelParameter.xhtml **/ GLint w, h; glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w); glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &h); if (width != static_cast<unsigned int>(w) || height != static_cast<unsigned int>(h)) { throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, "Your GPU cannot create a texture of size " + boost::lexical_cast<std::string>(width) + " x " + boost::lexical_cast<std::string>(height)); } #endif 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::Load(const Orthanc::ImageAccessor& image, bool isLinearInterpolation) { if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth()) { throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "Pitch is not the same as the row size"); } else { Setup(image.GetFormat(), image.GetWidth(), image.GetHeight(), isLinearInterpolation, image.GetConstBuffer()); } } void OpenGLTexture::Bind(GLint location) const { glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture_); glUniform1i(location, 0 /* texture unit */); } void OpenGLTexture::BindAsTextureUnit(GLint location, unsigned int unit) const { if (unit >= 32) { throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); } assert(GL_TEXTURE0 + 1 == GL_TEXTURE1 && GL_TEXTURE0 + 31 == GL_TEXTURE31); glActiveTexture(GL_TEXTURE0 + unit); glBindTexture(GL_TEXTURE_2D, texture_); glUniform1i(location, unit /* texture unit */); } Orthanc::ImageAccessor* OpenGLTexture::Download(Orthanc::PixelFormat format) const { if (context_.IsContextLost()) { throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, "OpenGL context is lost"); } std::unique_ptr<Orthanc::ImageAccessor> target(new Orthanc::Image(format, width_, height_, true)); assert(target->GetPitch() == width_ * Orthanc::GetBytesPerPixel(format)); #if defined(__EMSCRIPTEN__) /** * The "glGetTexImage()" is unavailable in WebGL, it is * necessary to use a framebuffer: * https://stackoverflow.com/a/15064957 **/ throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); #else glBindTexture(GL_TEXTURE_2D, texture_); switch (format) { case Orthanc::PixelFormat_Grayscale8: glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RED, GL_UNSIGNED_BYTE, target->GetBuffer()); break; case Orthanc::PixelFormat_RGB24: glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RGB, GL_UNSIGNED_BYTE, target->GetBuffer()); break; case Orthanc::PixelFormat_RGBA32: glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RGBA, GL_UNSIGNED_BYTE, target->GetBuffer()); break; case Orthanc::PixelFormat_Float32: glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RED, GL_FLOAT, target->GetBuffer()); break; default: throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); } #endif return target.release(); } void OpenGLTexture::SetClampingToZero() { ORTHANC_OPENGL_CHECK("Entering OpenGLTexture::SetClampingToZero()"); #if defined(__EMSCRIPTEN__) /** * This is because WebGL 2 derives from OpenGL ES 3.0, which * doesn't support GL_CLAMP_TO_BORDER, as can be seen here: * https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glTexParameter.xhtml **/ LOG(WARNING) << "OpenGLTexture::SetClampingToZero() is not available in WebGL 2"; #else glBindTexture(GL_TEXTURE_2D, texture_); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); GLfloat colorfv[4] = { 0, 0, 0, 0 }; glTextureParameterfv(texture_, GL_TEXTURE_BORDER_COLOR, colorfv); #endif ORTHANC_OPENGL_CHECK("Exiting OpenGLTexture::SetClampingToZero()"); } void OpenGLTexture::ConvertToOpenGLFormats(GLenum& sourceFormat, GLenum& internalFormat, GLenum& pixelType, Orthanc::PixelFormat format) { switch (format) { case Orthanc::PixelFormat_Grayscale8: sourceFormat = GL_RED; internalFormat = GL_RED; pixelType = GL_UNSIGNED_BYTE; break; case Orthanc::PixelFormat_RGB24: sourceFormat = GL_RGB; internalFormat = GL_RGB; pixelType = GL_UNSIGNED_BYTE; break; case Orthanc::PixelFormat_RGBA32: sourceFormat = GL_RGBA; internalFormat = GL_RGBA; pixelType = GL_UNSIGNED_BYTE; break; case Orthanc::PixelFormat_Float32: sourceFormat = GL_RED; internalFormat = GL_R32F; // Don't use "GL_RED" here, as it clamps to [0,1] pixelType = GL_FLOAT; break; default: throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, "No support for this format in OpenGL textures: " + std::string(EnumerationToString(format))); } } } }