Mercurial > hg > orthanc-stone
annotate Framework/Viewport/CairoSurface.cpp @ 457:3b4df9925db6 am-touch-events
added support for 'touch' in mouse trackers. This is still a bit hacky and we need to refactor it to make it clean. Thanks to that, Pan and zoom are available together with 2 touches
| author | Alain Mazy <alain@mazy.be> |
|---|---|
| date | Thu, 24 Jan 2019 16:42:27 +0100 |
| parents | b70e9be013e4 |
| children | b1e1eccee214 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 439 | 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 47 | 8 * modify it under the terms of the GNU Affero General Public License |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 0 | 11 * |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 47 | 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "CairoSurface.h" | |
| 23 | |
|
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24 #include <Core/Logging.h> |
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25 #include <Core/OrthancException.h> |
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26 #include <Core/Images/ImageProcessing.h> |
| 0 | 27 |
| 28 namespace OrthancStone | |
| 29 { | |
| 30 void CairoSurface::Release() | |
| 31 { | |
| 32 if (surface_) | |
| 33 { | |
| 34 cairo_surface_destroy(surface_); | |
| 35 surface_ = NULL; | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 | |
| 40 void CairoSurface::Allocate(unsigned int width, | |
| 41 unsigned int height) | |
| 42 { | |
| 43 Release(); | |
| 44 | |
| 45 surface_ = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height); | |
| 46 if (!surface_) | |
| 47 { | |
| 48 // Should never occur | |
| 49 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 50 } | |
| 51 | |
| 52 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS) | |
| 53 { | |
| 54 LOG(ERROR) << "Cannot create a Cairo surface"; | |
| 55 cairo_surface_destroy(surface_); | |
| 56 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 57 } | |
| 58 | |
| 59 width_ = width; | |
| 60 height_ = height; | |
| 61 pitch_ = cairo_image_surface_get_stride(surface_); | |
| 62 buffer_ = cairo_image_surface_get_data(surface_); | |
| 63 } | |
| 64 | |
| 65 | |
| 66 CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor) | |
| 67 { | |
| 68 if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32) | |
| 69 { | |
| 70 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
| 71 } | |
| 72 | |
| 73 width_ = accessor.GetWidth(); | |
| 74 height_ = accessor.GetHeight(); | |
| 75 pitch_ = accessor.GetPitch(); | |
| 76 buffer_ = accessor.GetBuffer(); | |
| 77 | |
| 78 surface_ = cairo_image_surface_create_for_data | |
| 79 (reinterpret_cast<unsigned char*>(buffer_), CAIRO_FORMAT_RGB24, width_, height_, pitch_); | |
| 80 if (!surface_) | |
| 81 { | |
| 82 // Should never occur | |
| 83 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 84 } | |
| 85 | |
| 86 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS) | |
| 87 { | |
| 88 LOG(ERROR) << "Bad pitch for a Cairo surface"; | |
| 89 cairo_surface_destroy(surface_); | |
| 90 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 | |
| 95 void CairoSurface::SetSize(unsigned int width, | |
| 96 unsigned int height) | |
| 97 { | |
| 98 if (width_ != width || | |
| 99 height_ != height) | |
| 100 { | |
| 101 Allocate(width, height); | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 | |
| 106 void CairoSurface::Copy(const CairoSurface& other) | |
| 107 { | |
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108 Orthanc::ImageAccessor source, target; |
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109 |
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110 other.GetReadOnlyAccessor(source); |
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111 GetWriteableAccessor(target); |
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112 |
| 0 | 113 Orthanc::ImageProcessing::Copy(target, source); |
| 114 } | |
| 115 | |
| 116 | |
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117 void CairoSurface::GetReadOnlyAccessor(Orthanc::ImageAccessor& target) const |
| 0 | 118 { |
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119 target.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_); |
| 0 | 120 } |
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121 |
| 0 | 122 |
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123 void CairoSurface::GetWriteableAccessor(Orthanc::ImageAccessor& target) |
| 0 | 124 { |
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125 target.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_); |
| 0 | 126 } |
| 127 } |