Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/OpenGL/OpenGLTexture.cpp @ 1624:59f95b9ea858

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fix build
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 06 Nov 2020 17:30:36 +0100
parents 8563ea5d8ae4
children 9ac2a65d4172
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "OpenGLTexture.h"
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24 #include "IOpenGLContext.h"
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25
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26 #include <Logging.h>
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27 #include <OrthancException.h>
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28
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29 namespace OrthancStone
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30 {
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31 namespace OpenGL
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32 {
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33 OpenGLTexture::OpenGLTexture(OpenGL::IOpenGLContext& context)
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34 : width_(0)
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35 , height_(0)
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36 , context_(context)
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37 {
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38 if (!context_.IsContextLost())
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39 {
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40 // Generate a texture object
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41 glGenTextures(1, &texture_);
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42 if (texture_ == 0)
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43 {
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44 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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45 "Cannot create an OpenGL program");
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46 }
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47 }
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48 }
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49
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50 OpenGLTexture::~OpenGLTexture()
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51 {
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52 try
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53 {
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54 if (!context_.IsContextLost())
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55 {
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56 assert(texture_ != 0);
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57 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteTextures");
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58 glDeleteTextures(1, &texture_);
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59 }
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60 }
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61 catch (const Orthanc::OrthancException& e)
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62 {
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63 if (e.HasDetails())
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64 {
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65 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What() << " Details: " << e.GetDetails();
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66 }
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67 else
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68 {
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69 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What();
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70 }
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71 }
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72 catch (const std::exception& e)
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73 {
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74 LOG(ERROR) << "std::exception in ~OpenGLTexture: " << e.what();
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75 }
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76 catch (...)
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77 {
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78 LOG(ERROR) << "Unknown exception in ~OpenGLTexture";
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79 }
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80 }
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81
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82 void OpenGLTexture::Load(const Orthanc::ImageAccessor& image,
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83 bool isLinearInterpolation)
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84 {
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85 if (!context_.IsContextLost())
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86 {
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87 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Disable byte-alignment restriction
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88
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89 if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth())
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90 {
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91 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented,
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92 "Unsupported non-zero padding");
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93 }
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94
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95 // Bind it
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96 glActiveTexture(GL_TEXTURE0);
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97 glBindTexture(GL_TEXTURE_2D, texture_);
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98
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99 GLenum sourceFormat, internalFormat;
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100
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101 switch (image.GetFormat())
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102 {
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103 case Orthanc::PixelFormat_Grayscale8:
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104 sourceFormat = GL_RED;
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105 internalFormat = GL_RED;
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106 break;
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107
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108 case Orthanc::PixelFormat_RGB24:
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109 sourceFormat = GL_RGB;
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110 internalFormat = GL_RGB;
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111 break;
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112
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113 case Orthanc::PixelFormat_RGBA32:
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114 sourceFormat = GL_RGBA;
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115 internalFormat = GL_RGBA;
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116 break;
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117
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118 default:
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119 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented,
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120 "No support for this format in OpenGL textures: " +
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121 std::string(EnumerationToString(image.GetFormat())));
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122 }
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123
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124 width_ = image.GetWidth();
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125 height_ = image.GetHeight();
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126
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127 GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST);
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128
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129 // Load the texture from the image buffer
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130 glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, image.GetWidth(), image.GetHeight(),
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131 0, sourceFormat, GL_UNSIGNED_BYTE, image.GetConstBuffer());
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132 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, interpolation);
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133 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, interpolation);
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134 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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135 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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136 }
579
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137 }
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138
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139
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140 void OpenGLTexture::Bind(GLint location)
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141 {
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142 glActiveTexture(GL_TEXTURE0);
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143 glBindTexture(GL_TEXTURE_2D, texture_);
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144 glUniform1i(location, 0 /* texture unit */);
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145 }
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146 }
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147 }