This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_macgl.c
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
Lesser General Public License for more details.
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
Sam Lantinga
20
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
25
26
27
/* AGL implementation of SDL OpenGL support */
#include "SDL_lowvideo.h"
#include "SDL_macgl_c.h"
28
#include "SDL_loadso.h"
29
30
31
/* krat: adding OpenGL support */
33
Mac_GL_Init(_THIS)
35
#if SDL_VIDEO_OPENGL
36
37
38
39
40
41
42
43
AGLPixelFormat format;
int i = 0;
GLint attributes[26]; /* 26 is max possible in this setup */
GLboolean noerr;
/* load the gl driver from a default path */
if (!this->gl_config.driver_loaded) {
/* no driver has been loaded, use default (ourselves) */
44
if (Mac_GL_LoadLibrary(this, NULL) < 0) {
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
return (-1);
}
}
attributes[i++] = AGL_RGBA;
if (this->gl_config.red_size != 0 &&
this->gl_config.blue_size != 0 && this->gl_config.green_size != 0) {
attributes[i++] = AGL_RED_SIZE;
attributes[i++] = this->gl_config.red_size;
attributes[i++] = AGL_GREEN_SIZE;
attributes[i++] = this->gl_config.green_size;
attributes[i++] = AGL_BLUE_SIZE;
attributes[i++] = this->gl_config.blue_size;
attributes[i++] = AGL_ALPHA_SIZE;
attributes[i++] = this->gl_config.alpha_size;
}
if (this->gl_config.double_buffer) {
attributes[i++] = AGL_DOUBLEBUFFER;
}
if (this->gl_config.depth_size != 0) {
attributes[i++] = AGL_DEPTH_SIZE;
attributes[i++] = this->gl_config.depth_size;
}
if (this->gl_config.stencil_size != 0) {
attributes[i++] = AGL_STENCIL_SIZE;
attributes[i++] = this->gl_config.stencil_size;
}
if (this->gl_config.accum_red_size != 0 &&
this->gl_config.accum_blue_size != 0 &&
this->gl_config.accum_green_size != 0) {
attributes[i++] = AGL_ACCUM_RED_SIZE;
attributes[i++] = this->gl_config.accum_red_size;
attributes[i++] = AGL_ACCUM_GREEN_SIZE;
attributes[i++] = this->gl_config.accum_green_size;
attributes[i++] = AGL_ACCUM_BLUE_SIZE;
attributes[i++] = this->gl_config.accum_blue_size;
attributes[i++] = AGL_ACCUM_ALPHA_SIZE;
attributes[i++] = this->gl_config.accum_alpha_size;
}
if (this->gl_config.stereo) {
attributes[i++] = AGL_STEREO;
}
88
#if defined(AGL_SAMPLE_BUFFERS_ARB) && defined(AGL_SAMPLES_ARB)
89
90
91
92
93
94
95
96
if (this->gl_config.multisamplebuffers != 0) {
attributes[i++] = AGL_SAMPLE_BUFFERS_ARB;
attributes[i++] = this->gl_config.multisamplebuffers;
}
if (this->gl_config.multisamplesamples != 0) {
attributes[i++] = AGL_SAMPLES_ARB;
attributes[i++] = this->gl_config.multisamplesamples;
}
97
#endif
98
99
100
101
102
103
104
105
if (this->gl_config.accelerated > 0) {
attributes[i++] = AGL_ACCELERATED;
attributes[i++] = AGL_NO_RECOVERY;
}
attributes[i++] = AGL_ALL_RENDERERS;
attributes[i] = AGL_NONE;
106
format = aglChoosePixelFormat(NULL, 0, attributes);
107
if (format == NULL) {
108
SDL_SetError("Couldn't match OpenGL desired format");
109
110
111
return (-1);
}
112
glContext = aglCreateContext(format, NULL);
113
if (glContext == NULL) {
114
SDL_SetError("Couldn't create OpenGL context");
115
116
return (-1);
}
117
aglDestroyPixelFormat(format);
118
119
#if TARGET_API_MAC_CARBON
120
noerr = aglSetDrawable(glContext, GetWindowPort(SDL_Window));
121
#else
122
noerr = aglSetDrawable(glContext, (AGLDrawable) SDL_Window);
123
124
125
#endif
if (!noerr) {
126
SDL_SetError("Unable to bind GL context to window");
127
128
129
130
return (-1);
}
return (0);
#else
131
SDL_SetError("OpenGL support not configured");
133
134
135
#endif
}
137
Mac_GL_Quit(_THIS)
138
{
139
#if SDL_VIDEO_OPENGL
140
if (glContext != NULL) {
141
142
143
aglSetCurrentContext(NULL);
aglSetDrawable(glContext, NULL);
aglDestroyContext(glContext);
144
145
glContext = NULL;
}
146
147
148
#endif
}
149
#if SDL_VIDEO_OPENGL
150
151
/* Make the current context active */
153
Mac_GL_MakeCurrent(_THIS)
154
{
155
156
157
int retval;
retval = 0;
158
159
if (!aglSetCurrentContext(glContext)) {
SDL_SetError("Unable to make GL context current");
160
161
162
retval = -1;
}
return (retval);
163
164
}
166
Mac_GL_SwapBuffers(_THIS)
167
{
168
aglSwapBuffers(glContext);
169
170
}
172
Mac_GL_LoadLibrary(_THIS, const char *location)
174
if (location == NULL)
175
#if __MACH__
176
location = "/System/Library/Frameworks/OpenGL.framework/OpenGL";
177
#else
178
location = "OpenGLLibrary";
179
#endif
181
this->hidden->libraryHandle = SDL_LoadObject(location);
183
184
this->gl_config.driver_loaded = 1;
return (this->hidden->libraryHandle != NULL) ? 0 : -1;
188
Mac_GL_UnloadLibrary(_THIS)
190
SDL_UnloadObject(this->hidden->libraryHandle);
192
193
this->hidden->libraryHandle = NULL;
this->gl_config.driver_loaded = 0;
197
Mac_GL_GetProcAddress(_THIS, const char *proc)
199
return SDL_LoadFunction(this->hidden->libraryHandle, proc);
202
#endif /* SDL_VIDEO_OPENGL */
203
/* vi: set ts=4 sw=4 expandtab: */