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view OrthancStone/Sources/Wrappers/CairoSurface.cpp @ 1842:9568082ee013
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 24 Jun 2021 14:19:36 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2021 Osimis S.A., 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 "CairoSurface.h" #include <Logging.h> #include <OrthancException.h> #include <Images/ImageProcessing.h> namespace OrthancStone { void CairoSurface::Release() { if (surface_) { cairo_surface_destroy(surface_); surface_ = NULL; } } void CairoSurface::Allocate(unsigned int width, unsigned int height, bool hasAlpha) { Release(); hasAlpha_ = hasAlpha; surface_ = cairo_image_surface_create (hasAlpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, width, height); if (!surface_) { // Should never occur throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); } if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS) { LOG(ERROR) << "Cannot create a Cairo surface"; cairo_surface_destroy(surface_); throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); } width_ = width; height_ = height; pitch_ = cairo_image_surface_get_stride(surface_); buffer_ = cairo_image_surface_get_data(surface_); } CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor, bool hasAlpha) : hasAlpha_(hasAlpha) { if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32) { throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); } width_ = accessor.GetWidth(); height_ = accessor.GetHeight(); pitch_ = accessor.GetPitch(); buffer_ = accessor.GetBuffer(); surface_ = cairo_image_surface_create_for_data (reinterpret_cast<unsigned char*>(buffer_), hasAlpha_ ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, width_, height_, pitch_); if (!surface_) { // Should never occur throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); } if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS) { LOG(ERROR) << "Bad pitch for a Cairo surface"; cairo_surface_destroy(surface_); throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); } } void CairoSurface::SetSize(unsigned int width, unsigned int height, bool hasAlpha) { if (hasAlpha_ != hasAlpha || width_ != width || height_ != height) { Allocate(width, height, hasAlpha); } } void CairoSurface::Copy(const CairoSurface& other) { SetSize(other.GetWidth(), other.GetHeight(), other.HasAlpha()); Orthanc::ImageAccessor source, target; other.GetReadOnlyAccessor(source); GetWriteableAccessor(target); Orthanc::ImageProcessing::Copy(target, source); cairo_surface_mark_dirty(surface_); } void CairoSurface::Copy(const Orthanc::ImageAccessor& source, bool hasAlpha) { SetSize(source.GetWidth(), source.GetHeight(), hasAlpha); Orthanc::ImageAccessor target; GetWriteableAccessor(target); Orthanc::ImageProcessing::Convert(target, source); cairo_surface_mark_dirty(surface_); } void CairoSurface::GetReadOnlyAccessor(Orthanc::ImageAccessor& target) const { target.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_); } void CairoSurface::GetWriteableAccessor(Orthanc::ImageAccessor& target) { target.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_); } }