1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* mogl_rebinder.c -- Dynamic extension rebinding.
*
*/
#include "GL/glew.h"
// Dynamic extension rebinding: This is in an extra file mogl_rebinder.c and defined
// with explicit C linkage. Reason: For the Octave version, we need to compile all
// files (except glew.c) as C++, not C, otherwise won't work. The C++ compiler is
// more picky about function pointer assignments and will abort for hacks like in
// mogl_rebind... -> Move this function into separate file, compile that file as
// C file, make the compiler happy.
// Dynamic rebinding of ARB extensions to core routines:
// This is a trick to get GLSL working on current OS-X (10.4.4). MacOS-X supports the OpenGL
// shading language on all graphics cards as an ARB extension. But as OS-X only supports
// OpenGL versions < 2.0 as of now, the functionality is not available as core functions, but
// only as their ARB counterparts. e.g., glCreateProgram() is always a NULL-Ptr on OS-X, but
// glCreateProgramObjectARB() is supported with exactly the same syntax and behaviour. By
// binding glCreateProgram as glCreateProgramObjectARB, we allow users to write Matlab code
// that uses glCreateProgram -- which is cleaner code than using glCreateProgramObjectARB,
// and it saves us from parsing tons of additional redundant function definitions anc code
// generation...
// In this function, we try to detect such OS dependent quirks and try to work around them...
#ifdef PTBOCTAVE
extern "C" void mogl_rebindARBExtensionsToCore(void)
#else
void mogl_rebindARBExtensionsToCore(void)
#endif
{
#ifndef NULL
#define NULL 0
#endif
// Remap unsupported OpenGL 2.0 core functions for GLSL to supported ARB extension counterparts:
if (NULL == glCreateProgram) glCreateProgram = glCreateProgramObjectARB;
if (NULL == glCreateShader) glCreateShader = glCreateShaderObjectARB;
if (NULL == glShaderSource) glShaderSource = glShaderSourceARB;
if (NULL == glCompileShader) glCompileShader = glCompileShaderARB;
if (NULL == glAttachShader) glAttachShader = glAttachObjectARB;
if (NULL == glLinkProgram) glLinkProgram = glLinkProgramARB;
if (NULL == glUseProgram) glUseProgram = glUseProgramObjectARB;
if (NULL == glGetAttribLocation) glGetAttribLocation = glGetAttribLocationARB;
#ifndef WINR2007a
// Windows + Octave or any other OS:
if (NULL == glGetUniformLocation) glGetUniformLocation = (GLint (*)(GLint, const GLchar*)) glGetUniformLocationARB;
#else
// Windows + Matlab R2007a or later:
if (NULL == glGetUniformLocation) glGetUniformLocation = glGetUniformLocationARB;
#endif
if (NULL == glGetUniformfv) glGetUniformfv = glGetUniformfvARB;
if (NULL == glUniform1f) glUniform1f = glUniform1fARB;
if (NULL == glUniform2f) glUniform2f = glUniform2fARB;
if (NULL == glUniform3f) glUniform3f = glUniform3fARB;
if (NULL == glUniform4f) glUniform4f = glUniform4fARB;
if (NULL == glUniform1fv) glUniform1fv = glUniform1fvARB;
if (NULL == glUniform2fv) glUniform2fv = glUniform2fvARB;
if (NULL == glUniform3fv) glUniform3fv = glUniform3fvARB;
if (NULL == glUniform4fv) glUniform4fv = glUniform4fvARB;
if (NULL == glUniform1i) glUniform1i = glUniform1iARB;
if (NULL == glUniform2i) glUniform2i = glUniform2iARB;
if (NULL == glUniform3i) glUniform3i = glUniform3iARB;
if (NULL == glUniform4i) glUniform4i = glUniform4iARB;
if (NULL == glUniform1iv) glUniform1iv = glUniform1ivARB;
if (NULL == glUniform2iv) glUniform2iv = glUniform2ivARB;
if (NULL == glUniform3iv) glUniform3iv = glUniform3ivARB;
if (NULL == glUniform4iv) glUniform4iv = glUniform4ivARB;
if (NULL == glUniformMatrix2fv) glUniformMatrix2fv = glUniformMatrix2fvARB;
if (NULL == glUniformMatrix3fv) glUniformMatrix3fv = glUniformMatrix3fvARB;
if (NULL == glUniformMatrix4fv) glUniformMatrix4fv = glUniformMatrix4fvARB;
if (NULL == glGetShaderiv) glGetShaderiv = glGetObjectParameterivARB;
if (NULL == glGetProgramiv) glGetProgramiv = glGetObjectParameterivARB;
if (NULL == glGetShaderInfoLog) glGetShaderInfoLog = glGetInfoLogARB;
if (NULL == glGetProgramInfoLog) glGetProgramInfoLog = glGetInfoLogARB;
if (NULL == glValidateProgram) glValidateProgram = glValidateProgramARB;
if (NULL == glIsProgram) glIsProgram = glIsProgramARB;
// ARB_vertex_buffer_object:
if (NULL == glGenBuffers) glGenBuffers = glGenBuffersARB;
if (NULL == glDeleteBuffers) glDeleteBuffers = glDeleteBuffersARB;
if (NULL == glBindBuffer) glBindBuffer = glBindBufferARB;
if (NULL == glBufferData) glBufferData = glBufferDataARB;
if (NULL == glBufferSubData) glBufferSubData = glBufferSubDataARB;
if (NULL == glGetBufferSubData) glGetBufferSubData = glGetBufferSubDataARB;
if (NULL == glIsBuffer) glIsBuffer = glIsBufferARB;
if (NULL == glMapBuffer) glMapBuffer = glMapBufferARB;
if (NULL == glUnmapBuffer) glUnmapBuffer = glUnmapBufferARB;
if (NULL == glGetBufferPointerv) glGetBufferPointerv = glGetBufferPointervARB;
if (NULL == glGetBufferParameteriv) glGetBufferParameteriv = glGetBufferParameterivARB;
// Misc other stuff to remap...
if (NULL == glDrawRangeElements) glDrawRangeElements = glDrawRangeElementsEXT;
return;
}
|
