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comparison OrthancStone/Sources/OpenGL/OpenGLShader.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/OpenGLShader.cpp@30deba7bc8e2
children 85e117739eca
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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 "OpenGLShader.h"
23
24 #include <OrthancException.h>
25
26 namespace OrthancStone
27 {
28 namespace OpenGL
29 {
30 static GLuint CompileShader(GLenum type,
31 const std::string& source)
32 {
33 // Create shader object
34 const GLchar* sourceString[1];
35 GLint sourceStringLengths[1];
36
37 sourceString[0] = source.c_str();
38 sourceStringLengths[0] = static_cast<GLint>(source.length());
39 GLuint shader = glCreateShader(type);
40 ORTHANC_OPENGL_CHECK("glCreateShader");
41
42 if (shader == 0)
43 {
44 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
45 "Cannot create an OpenGL shader");
46 }
47 else
48 {
49 // Assign and compile the source to the shader object
50 glShaderSource(shader, 1, sourceString, sourceStringLengths);
51 ORTHANC_OPENGL_CHECK("glShaderSource");
52 glCompileShader(shader);
53 ORTHANC_OPENGL_CHECK("glCompileShader");
54
55 // Check if there were errors
56 int infoLen = 0;
57 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
58 ORTHANC_OPENGL_CHECK("glGetShaderiv");
59
60 if (infoLen > 1) // Might be equal to 1, which amounts to no error
61 {
62 std::string infoLog;
63 infoLog.resize(infoLen + 1);
64 glGetShaderInfoLog(shader, infoLen, NULL, &infoLog[0]);
65 ORTHANC_OPENGL_CHECK("glGetShaderInfoLog");
66 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader");
67 glDeleteShader(shader);
68 ORTHANC_OPENGL_CHECK("glDeleteShader");
69
70 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
71 "Error while creating an OpenGL shader: " + infoLog);
72 }
73 else
74 {
75 return shader;
76 }
77 }
78 }
79
80
81 OpenGLShader::OpenGLShader(GLenum type,
82 const std::string& source)
83 {
84 shader_ = CompileShader(type, source);
85 isValid_ = true;
86 }
87
88
89 OpenGLShader::~OpenGLShader()
90 {
91 try
92 {
93 if (isValid_)
94 {
95 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteShader");
96 glDeleteShader(shader_);
97 ORTHANC_OPENGL_CHECK("glDeleteShader");
98 }
99 }
100 catch (const Orthanc::OrthancException& e)
101 {
102 if (e.HasDetails())
103 {
104 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What() << " Details: " << e.GetDetails();
105 }
106 else
107 {
108 LOG(ERROR) << "OrthancException in ~OpenGLShader: " << e.What();
109 }
110 }
111 catch (const std::exception& e)
112 {
113 LOG(ERROR) << "std::exception in ~OpenGLShader: " << e.what();
114 }
115 catch (...)
116 {
117 LOG(ERROR) << "Unknown exception in ~OpenGLShader";
118 }
119 }
120
121 GLuint OpenGLShader::Release()
122 {
123 if (isValid_)
124 {
125 isValid_ = false;
126 return shader_;
127 }
128 else
129 {
130 LOG(ERROR) << "OpenGLShader::Release(): (!isValid_)";
131 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
132 }
133 }
134 }
135 }