JeVois  1.17
JeVois Smart Embedded Machine Vision Toolkit
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GPUprogram.C
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1 // ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2 //
3 // JeVois Smart Embedded Machine Vision Toolkit - Copyright (C) 2016 by Laurent Itti, the University of Southern
4 // California (USC), and iLab at USC. See http://iLab.usc.edu and http://jevois.org for information about this project.
5 //
6 // This file is part of the JeVois Smart Embedded Machine Vision Toolkit. This program is free software; you can
7 // redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
8 // Foundation, version 2. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
9 // without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
10 // License for more details. You should have received a copy of the GNU General Public License along with this program;
11 // if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
12 //
13 // Contact information: Laurent Itti - 3641 Watt Way, HNB-07A - Los Angeles, CA 90089-2520 - USA.
14 // Tel: +1 213 740 3527 - itti@pollux.usc.edu - http://iLab.usc.edu - http://jevois.org
15 // ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
16 /*! \file */
17 
18 #include <jevois/GPU/GPUprogram.H>
19 
20 // ####################################################################################################
21 jevois::GPUprogram::GPUprogram(char const * vertex_shader, char const * fragment_shader)
22 {
23  if (vertex_shader[0] == '#') itsVertexShader.set("vertex", vertex_shader, GL_VERTEX_SHADER);
24  else itsVertexShader.load(vertex_shader, GL_VERTEX_SHADER);
25 
26  if (fragment_shader[0] == '#') itsFragmentShader.set("fragment", fragment_shader, GL_FRAGMENT_SHADER);
27  else itsFragmentShader.load(fragment_shader, GL_FRAGMENT_SHADER);
28 
29  itsId = glCreateProgram();
30  GL_CHECK(glAttachShader(itsId, itsVertexShader.id()));
31  GL_CHECK(glAttachShader(itsId, itsFragmentShader.id()));
32  GL_CHECK(glLinkProgram(itsId));
33 
34  LDEBUG("GPU program " << itsId <<" created.");
35 
36  /*
37  // Prints the information log for a program object
38  char log[1024];
39  glGetProgramInfoLog(Id,sizeof log,NULL,log);
40  printf("%d:program:\n%s\n", Id, log);
41  */
42 }
43 
44 // ####################################################################################################
46 {
47  // Disable the program:
48  glUseProgram(0);
49 
50  // Nuke it:
51  glDetachShader(itsId, itsVertexShader.id());
52  glDetachShader(itsId, itsFragmentShader.id());
53  glDeleteProgram(itsId);
54 }
55 
56 // ####################################################################################################
57 GLuint jevois::GPUprogram::id() const
58 { return itsId; }
GPUprogram.H
LDEBUG
#define LDEBUG(msg)
Convenience macro for users to print out console or syslog messages, DEBUG level.
Definition: Log.H:160
jevois::GPUprogram::~GPUprogram
~GPUprogram()
Destructor, deletes the program from OpenGL and frees up the ID.
Definition: GPUprogram.C:45
jevois::GPUshader::set
void set(char const *name, char const *str, GLuint type)
Load a shader from inlined code in a C-string.
Definition: GPUshader.C:57
jevois::GPUshader::id
GLuint id() const
Get the shader's ID.
Definition: GPUshader.C:32
GL_CHECK
#define GL_CHECK(stmt)
Simple macro to check for OpenGL errors.
Definition: OpenGL.H:77
jevois::GPUprogram::id
GLuint id() const
Get the program ID so we can tell OpenGL to use this program.
Definition: GPUprogram.C:57
jevois::GPUprogram::GPUprogram
GPUprogram(char const *vertex_shader, char const *fragment_shader)
Constructor, loads and compiles the program, assigns it a program ID.
Definition: GPUprogram.C:21
jevois::GPUshader::load
void load(char const *filename, GLuint type)
Load a shader from file.
Definition: GPUshader.C:36