Mercurial > hg > orthanc-stone
annotate Framework/OpenGL/OpenGLTexture.cpp @ 767:dce5b067d040
fix
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 23 May 2019 16:57:33 +0200 |
parents | 97926984d5d0 |
children | 1091b2adeb5a |
rev | line source |
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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) 2017-2019 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 Affero 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 * Affero 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 Affero General Public License |
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 **/ |
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20 |
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21 |
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22 #include "OpenGLTexture.h" |
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23 |
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24 #include <Core/OrthancException.h> |
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25 |
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26 namespace OrthancStone |
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27 { |
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28 namespace OpenGL |
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29 { |
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30 OpenGLTexture::OpenGLTexture() : |
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31 width_(0), |
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32 height_(0) |
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33 { |
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34 // Generate a texture object |
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35 glGenTextures(1, &texture_); |
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36 if (texture_ == 0) |
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37 { |
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38 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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39 "Cannot create an OpenGL program"); |
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40 } |
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41 } |
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42 |
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43 |
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44 OpenGLTexture::~OpenGLTexture() |
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45 { |
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46 assert(texture_ != 0); |
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47 glDeleteTextures(1, &texture_); |
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48 } |
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49 |
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50 |
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51 void OpenGLTexture::Load(const Orthanc::ImageAccessor& image, |
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52 bool isLinearInterpolation) |
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53 { |
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54 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Disable byte-alignment restriction |
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55 |
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56 if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth()) |
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57 { |
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58 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, |
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59 "Unsupported non-zero padding"); |
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60 } |
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61 |
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62 // Bind it |
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63 glActiveTexture(GL_TEXTURE0); |
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64 glBindTexture(GL_TEXTURE_2D, texture_); |
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65 |
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66 GLenum sourceFormat, internalFormat; |
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67 |
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68 switch (image.GetFormat()) |
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69 { |
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70 case Orthanc::PixelFormat_Grayscale8: |
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71 sourceFormat = GL_RED; |
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72 internalFormat = GL_RED; |
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73 break; |
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74 |
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75 case Orthanc::PixelFormat_RGB24: |
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76 sourceFormat = GL_RGB; |
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77 internalFormat = GL_RGB; |
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78 break; |
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79 |
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80 case Orthanc::PixelFormat_RGBA32: |
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81 sourceFormat = GL_RGBA; |
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82 internalFormat = GL_RGBA; |
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83 break; |
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84 |
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85 default: |
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86 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented, |
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87 "No support for this format in OpenGL textures: " + |
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88 std::string(EnumerationToString(image.GetFormat()))); |
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89 } |
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90 |
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91 width_ = image.GetWidth(); |
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92 height_ = image.GetHeight(); |
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93 |
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94 GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST); |
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95 |
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96 // Load the texture from the image buffer |
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97 glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, image.GetWidth(), image.GetHeight(), |
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98 0, sourceFormat, GL_UNSIGNED_BYTE, image.GetBuffer()); |
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99 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, interpolation); |
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100 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, interpolation); |
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101 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
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102 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
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103 } |
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104 |
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105 |
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106 void OpenGLTexture::Bind(GLint location) |
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107 { |
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108 glActiveTexture(GL_TEXTURE0); |
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109 glBindTexture(GL_TEXTURE_2D, texture_); |
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110 glUniform1i(location, 0 /* texture unit */); |
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111 } |
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112 } |
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113 } |