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comparison OrthancStone/Sources/OpenGL/OpenGLTexture.cpp @ 1512:244ad1e4e76a

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reorganization of folders
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 16:21:02 +0200
parents Framework/OpenGL/OpenGLTexture.cpp@30deba7bc8e2
children e731e62692a9
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1511:9dfeee74c1e6 1512:244ad1e4e76a
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
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.
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
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
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #include "OpenGLTexture.h"
23 #include "IOpenGLContext.h"
24
25 #include <OrthancException.h>
26
27 namespace OrthancStone
28 {
29 namespace OpenGL
30 {
31 OpenGLTexture::OpenGLTexture(OpenGL::IOpenGLContext& context)
32 : width_(0)
33 , height_(0)
34 , context_(context)
35 {
36 if (!context_.IsContextLost())
37 {
38 // Generate a texture object
39 glGenTextures(1, &texture_);
40 if (texture_ == 0)
41 {
42 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
43 "Cannot create an OpenGL program");
44 }
45 }
46 }
47
48 OpenGLTexture::~OpenGLTexture()
49 {
50 try
51 {
52 if (!context_.IsContextLost())
53 {
54 assert(texture_ != 0);
55 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteTextures");
56 glDeleteTextures(1, &texture_);
57 }
58 }
59 catch (const Orthanc::OrthancException& e)
60 {
61 if (e.HasDetails())
62 {
63 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What() << " Details: " << e.GetDetails();
64 }
65 else
66 {
67 LOG(ERROR) << "OrthancException in ~OpenGLTexture: " << e.What();
68 }
69 }
70 catch (const std::exception& e)
71 {
72 LOG(ERROR) << "std::exception in ~OpenGLTexture: " << e.what();
73 }
74 catch (...)
75 {
76 LOG(ERROR) << "Unknown exception in ~OpenGLTexture";
77 }
78 }
79
80 void OpenGLTexture::Load(const Orthanc::ImageAccessor& image,
81 bool isLinearInterpolation)
82 {
83 if (!context_.IsContextLost())
84 {
85 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // Disable byte-alignment restriction
86
87 if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth())
88 {
89 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented,
90 "Unsupported non-zero padding");
91 }
92
93 // Bind it
94 glActiveTexture(GL_TEXTURE0);
95 glBindTexture(GL_TEXTURE_2D, texture_);
96
97 GLenum sourceFormat, internalFormat;
98
99 switch (image.GetFormat())
100 {
101 case Orthanc::PixelFormat_Grayscale8:
102 sourceFormat = GL_RED;
103 internalFormat = GL_RED;
104 break;
105
106 case Orthanc::PixelFormat_RGB24:
107 sourceFormat = GL_RGB;
108 internalFormat = GL_RGB;
109 break;
110
111 case Orthanc::PixelFormat_RGBA32:
112 sourceFormat = GL_RGBA;
113 internalFormat = GL_RGBA;
114 break;
115
116 default:
117 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented,
118 "No support for this format in OpenGL textures: " +
119 std::string(EnumerationToString(image.GetFormat())));
120 }
121
122 width_ = image.GetWidth();
123 height_ = image.GetHeight();
124
125 GLint interpolation = (isLinearInterpolation ? GL_LINEAR : GL_NEAREST);
126
127 // Load the texture from the image buffer
128 glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, image.GetWidth(), image.GetHeight(),
129 0, sourceFormat, GL_UNSIGNED_BYTE, image.GetBuffer());
130 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, interpolation);
131 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, interpolation);
132 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
133 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
134 }
135 }
136
137
138 void OpenGLTexture::Bind(GLint location)
139 {
140 glActiveTexture(GL_TEXTURE0);
141 glBindTexture(GL_TEXTURE_2D, texture_);
142 glUniform1i(location, 0 /* texture unit */);
143 }
144 }
145 }