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annotate Core/ImageFormats/ImageAccessor.cpp @ 861:a546b05a43da jpeg

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fix PngWriter
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 07 Jun 2014 10:49:00 +0200
parents 80c7e53a69b5
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "../PrecompiledHeaders.h"
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34 #include "ImageAccessor.h"
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35
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36 #include "../OrthancException.h"
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37
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38 #include <stdint.h>
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39 #include <cassert>
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40 #include <glog/logging.h>
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41
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42 namespace Orthanc
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43 {
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44 void* ImageAccessor::GetBuffer() const
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45 {
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46 if (readOnly_)
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47 {
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48 LOG(ERROR) << "Trying to write on a read-only image";
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49 throw OrthancException(ErrorCode_ReadOnly);
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50 }
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51
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52 return buffer_;
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53 }
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54
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55
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56 const void* ImageAccessor::GetConstRow(unsigned int y) const
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57 {
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58 if (buffer_ != NULL)
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59 {
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60 return reinterpret_cast<const uint8_t*>(buffer_) + y * pitch_;
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61 }
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62 else
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63 {
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64 return NULL;
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65 }
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66 }
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67
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68
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69 void* ImageAccessor::GetRow(unsigned int y) const
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70 {
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71 if (readOnly_)
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72 {
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73 LOG(ERROR) << "Trying to write on a read-only image";
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74 throw OrthancException(ErrorCode_ReadOnly);
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75 }
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76
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77 if (buffer_ != NULL)
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78 {
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79 return reinterpret_cast<uint8_t*>(buffer_) + y * pitch_;
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80 }
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81 else
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82 {
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83 return NULL;
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84 }
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85 }
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86
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87
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88 void ImageAccessor::AssignEmpty(PixelFormat format)
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89 {
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90 readOnly_ = false;
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91 format_ = format;
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92 width_ = 0;
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93 height_ = 0;
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94 pitch_ = 0;
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95 buffer_ = NULL;
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96 }
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97
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98
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99 void ImageAccessor::AssignReadOnly(PixelFormat format,
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100 unsigned int width,
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101 unsigned int height,
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102 unsigned int pitch,
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103 const void *buffer)
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104 {
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105 readOnly_ = true;
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106 format_ = format;
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107 width_ = width;
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108 height_ = height;
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109 pitch_ = pitch;
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110 buffer_ = const_cast<void*>(buffer);
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111
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112 assert(GetBytesPerPixel(format_) * width_ <= pitch_);
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113 }
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114
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115
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116 void ImageAccessor::AssignWritable(PixelFormat format,
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117 unsigned int width,
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118 unsigned int height,
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119 unsigned int pitch,
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120 void *buffer)
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121 {
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122 readOnly_ = false;
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123 format_ = format;
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124 width_ = width;
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125 height_ = height;
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126 pitch_ = pitch;
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127 buffer_ = buffer;
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128
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129 assert(GetBytesPerPixel(format_) * width_ <= pitch_);
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130 }
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131 }