Mercurial > hg > orthanc-stone
comparison Framework/OpenGL/OpenGLShader.cpp @ 578:21fd70df3fc9
starting work on OpenGL
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 19 Apr 2019 15:57:46 +0200 |
parents | |
children | fadacfbf5538 |
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577:b098a3aaf694 | 578:21fd70df3fc9 |
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1 /** | |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * Copyright (C) 2017-2019 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 <Core/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] = source.length(); | |
39 GLuint shader = glCreateShader(type); | |
40 | |
41 if (shader == 0) | |
42 { | |
43 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, | |
44 "Cannot create an OpenGL shader"); | |
45 } | |
46 else | |
47 { | |
48 // Assign and compile the source to the shader object | |
49 glShaderSource(shader, 1, sourceString, sourceStringLengths); | |
50 glCompileShader(shader); | |
51 | |
52 // Check if there were errors | |
53 int infoLen = 0; | |
54 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen); | |
55 | |
56 if (infoLen > 1) | |
57 { | |
58 char infoLog[infoLen + 1]; | |
59 glGetShaderInfoLog(shader, infoLen, NULL, infoLog); | |
60 glDeleteShader(shader); | |
61 | |
62 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, | |
63 "Error while creating an OpenGL shader: " + std::string(infoLog)); | |
64 } | |
65 else | |
66 { | |
67 return shader; | |
68 } | |
69 } | |
70 } | |
71 | |
72 | |
73 OpenGLShader::OpenGLShader(GLenum type, | |
74 const std::string& source) | |
75 { | |
76 shader_ = CompileShader(type, source); | |
77 isValid_ = true; | |
78 } | |
79 | |
80 | |
81 OpenGLShader::OpenGLShader(GLenum type, | |
82 Orthanc::EmbeddedResources::FileResourceId resource) | |
83 { | |
84 std::string content; | |
85 Orthanc::EmbeddedResources::GetFileResource(content, resource); | |
86 | |
87 shader_ = CompileShader(type, content); | |
88 isValid_ = true; | |
89 } | |
90 | |
91 | |
92 OpenGLShader::~OpenGLShader() | |
93 { | |
94 if (isValid_) | |
95 { | |
96 glDeleteShader(shader_); | |
97 } | |
98 } | |
99 | |
100 | |
101 GLuint OpenGLShader::Release() | |
102 { | |
103 if (isValid_) | |
104 { | |
105 isValid_ = false; | |
106 return shader_; | |
107 } | |
108 else | |
109 { | |
110 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
111 } | |
112 } | |
113 } | |
114 } |