Mercurial > hg > orthanc-stone

comparison Framework/Viewport/CairoSurface.cpp @ 0:351ab0da0150

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initial commit
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 14 Oct 2016 15:34:11 +0200
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children ff1e935768e7
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-1:000000000000 0:351ab0da0150
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 *
6 * This program is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
10 *
11 * In addition, as a special exception, the copyright holders of this
12 * program give permission to link the code of its release with the
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
14 * that use the same license as the "OpenSSL" library), and distribute
15 * the linked executables. You must obey the GNU General Public License
16 * in all respects for all of the code used other than "OpenSSL". If you
17 * modify file(s) with this exception, you may extend this exception to
18 * your version of the file(s), but you are not obligated to do so. If
19 * you do not wish to do so, delete this exception statement from your
20 * version. If you delete this exception statement from all source files
21 * in the program, then also delete it here.
22 *
23 * This program is distributed in the hope that it will be useful, but
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 **/
31
32
33 #include "CairoSurface.h"
34
35 #include "../Orthanc/Core/Logging.h"
36 #include "../Orthanc/Core/OrthancException.h"
37 #include "../Orthanc/Core/Images/ImageProcessing.h"
38
39 namespace OrthancStone
40 {
41 void CairoSurface::Release()
42 {
43 if (surface_)
44 {
45 cairo_surface_destroy(surface_);
46 surface_ = NULL;
47 }
48 }
49
50
51 void CairoSurface::Allocate(unsigned int width,
52 unsigned int height)
53 {
54 Release();
55
56 surface_ = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
57 if (!surface_)
58 {
59 // Should never occur
60 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
61 }
62
63 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
64 {
65 LOG(ERROR) << "Cannot create a Cairo surface";
66 cairo_surface_destroy(surface_);
67 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
68 }
69
70 width_ = width;
71 height_ = height;
72 pitch_ = cairo_image_surface_get_stride(surface_);
73 buffer_ = cairo_image_surface_get_data(surface_);
74 }
75
76
77 CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor)
78 {
79 if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32)
80 {
81 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
82 }
83
84 width_ = accessor.GetWidth();
85 height_ = accessor.GetHeight();
86 pitch_ = accessor.GetPitch();
87 buffer_ = accessor.GetBuffer();
88
89 surface_ = cairo_image_surface_create_for_data
90 (reinterpret_cast<unsigned char*>(buffer_), CAIRO_FORMAT_RGB24, width_, height_, pitch_);
91 if (!surface_)
92 {
93 // Should never occur
94 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
95 }
96
97 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
98 {
99 LOG(ERROR) << "Bad pitch for a Cairo surface";
100 cairo_surface_destroy(surface_);
101 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
102 }
103 }
104
105
106 void CairoSurface::SetSize(unsigned int width,
107 unsigned int height)
108 {
109 if (width_ != width ||
110 height_ != height)
111 {
112 Allocate(width, height);
113 }
114 }
115
116
117 void CairoSurface::Copy(const CairoSurface& other)
118 {
119 Orthanc::ImageAccessor source = other.GetConstAccessor();
120 Orthanc::ImageAccessor target = GetAccessor();
121 Orthanc::ImageProcessing::Copy(target, source);
122 }
123
124
125 Orthanc::ImageAccessor CairoSurface::GetConstAccessor() const
126 {
127 Orthanc::ImageAccessor accessor;
128 accessor.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
129 return accessor;
130 }
131
132
133 Orthanc::ImageAccessor CairoSurface::GetAccessor()
134 {
135 Orthanc::ImageAccessor accessor;
136 accessor.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
137 return accessor;
138 }
139 }