e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | 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 | /* AGL implementation of SDL OpenGL support */ |
25 | |
26 | #include "SDL_lowvideo.h" |
27 | #include "SDL_macgl_c.h" |
28 | #include "SDL_loadso.h" |
29 | |
30 | |
31 | /* krat: adding OpenGL support */ |
32 | int Mac_GL_Init(_THIS) |
33 | { |
34 | #if SDL_VIDEO_OPENGL |
35 | AGLPixelFormat format; |
36 | int i = 0; |
37 | GLint attributes [ 26 ]; /* 26 is max possible in this setup */ |
38 | GLboolean noerr; |
39 | |
40 | /* load the gl driver from a default path */ |
41 | if ( ! this->gl_config.driver_loaded ) { |
42 | /* no driver has been loaded, use default (ourselves) */ |
43 | if ( Mac_GL_LoadLibrary(this, NULL) < 0 ) { |
44 | return(-1); |
45 | } |
46 | } |
47 | |
48 | attributes[i++] = AGL_RGBA; |
49 | if ( this->gl_config.red_size != 0 && |
50 | this->gl_config.blue_size != 0 && |
51 | this->gl_config.green_size != 0 ) { |
52 | attributes[i++] = AGL_RED_SIZE; |
53 | attributes[i++] = this->gl_config.red_size; |
54 | attributes[i++] = AGL_GREEN_SIZE; |
55 | attributes[i++] = this->gl_config.green_size; |
56 | attributes[i++] = AGL_BLUE_SIZE; |
57 | attributes[i++] = this->gl_config.blue_size; |
58 | attributes[i++] = AGL_ALPHA_SIZE; |
59 | attributes[i++] = this->gl_config.alpha_size; |
60 | } |
61 | if ( this->gl_config.double_buffer ) { |
62 | attributes[i++] = AGL_DOUBLEBUFFER; |
63 | } |
64 | if ( this->gl_config.depth_size != 0 ) { |
65 | attributes[i++] = AGL_DEPTH_SIZE; |
66 | attributes[i++] = this->gl_config.depth_size; |
67 | } |
68 | if ( this->gl_config.stencil_size != 0 ) { |
69 | attributes[i++] = AGL_STENCIL_SIZE; |
70 | attributes[i++] = this->gl_config.stencil_size; |
71 | } |
72 | if ( this->gl_config.accum_red_size != 0 && |
73 | this->gl_config.accum_blue_size != 0 && |
74 | this->gl_config.accum_green_size != 0 ) { |
75 | |
76 | attributes[i++] = AGL_ACCUM_RED_SIZE; |
77 | attributes[i++] = this->gl_config.accum_red_size; |
78 | attributes[i++] = AGL_ACCUM_GREEN_SIZE; |
79 | attributes[i++] = this->gl_config.accum_green_size; |
80 | attributes[i++] = AGL_ACCUM_BLUE_SIZE; |
81 | attributes[i++] = this->gl_config.accum_blue_size; |
82 | attributes[i++] = AGL_ACCUM_ALPHA_SIZE; |
83 | attributes[i++] = this->gl_config.accum_alpha_size; |
84 | } |
85 | if ( this->gl_config.stereo ) { |
86 | attributes[i++] = AGL_STEREO; |
87 | } |
88 | #if defined(AGL_SAMPLE_BUFFERS_ARB) && defined(AGL_SAMPLES_ARB) |
89 | if ( this->gl_config.multisamplebuffers != 0 ) { |
90 | attributes[i++] = AGL_SAMPLE_BUFFERS_ARB; |
91 | attributes[i++] = this->gl_config.multisamplebuffers; |
92 | } |
93 | if ( this->gl_config.multisamplesamples != 0 ) { |
94 | attributes[i++] = AGL_SAMPLES_ARB; |
95 | attributes[i++] = this->gl_config.multisamplesamples; |
96 | } |
97 | #endif |
98 | if ( this->gl_config.accelerated > 0 ) { |
99 | attributes[i++] = AGL_ACCELERATED; |
100 | attributes[i++] = AGL_NO_RECOVERY; |
101 | } |
102 | |
103 | attributes[i++] = AGL_ALL_RENDERERS; |
104 | attributes[i] = AGL_NONE; |
105 | |
106 | format = aglChoosePixelFormat(NULL, 0, attributes); |
107 | if ( format == NULL ) { |
108 | SDL_SetError("Couldn't match OpenGL desired format"); |
109 | return(-1); |
110 | } |
111 | |
112 | glContext = aglCreateContext(format, NULL); |
113 | if ( glContext == NULL ) { |
114 | SDL_SetError("Couldn't create OpenGL context"); |
115 | return(-1); |
116 | } |
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 | #endif |
124 | |
125 | if(!noerr) { |
126 | SDL_SetError("Unable to bind GL context to window"); |
127 | return(-1); |
128 | } |
129 | return(0); |
130 | #else |
131 | SDL_SetError("OpenGL support not configured"); |
132 | return(-1); |
133 | #endif |
134 | } |
135 | |
136 | void Mac_GL_Quit(_THIS) |
137 | { |
138 | #if SDL_VIDEO_OPENGL |
139 | if ( glContext != NULL ) { |
140 | aglSetCurrentContext(NULL); |
141 | aglSetDrawable(glContext, NULL); |
142 | aglDestroyContext(glContext); |
143 | glContext = NULL; |
144 | } |
145 | #endif |
146 | } |
147 | |
148 | #if SDL_VIDEO_OPENGL |
149 | |
150 | /* Make the current context active */ |
151 | int Mac_GL_MakeCurrent(_THIS) |
152 | { |
153 | int retval; |
154 | |
155 | retval = 0; |
156 | if( ! aglSetCurrentContext(glContext) ) { |
157 | SDL_SetError("Unable to make GL context current"); |
158 | retval = -1; |
159 | } |
160 | return(retval); |
161 | } |
162 | |
163 | void Mac_GL_SwapBuffers(_THIS) |
164 | { |
165 | aglSwapBuffers(glContext); |
166 | } |
167 | |
168 | int Mac_GL_LoadLibrary(_THIS, const char *location) |
169 | { |
170 | if (location == NULL) |
171 | #if __MACH__ |
172 | location = "/System/Library/Frameworks/OpenGL.framework/OpenGL"; |
173 | #else |
174 | location = "OpenGLLibrary"; |
175 | #endif |
176 | |
177 | this->hidden->libraryHandle = SDL_LoadObject(location); |
178 | |
179 | this->gl_config.driver_loaded = 1; |
180 | return (this->hidden->libraryHandle != NULL) ? 0 : -1; |
181 | } |
182 | |
183 | void Mac_GL_UnloadLibrary(_THIS) |
184 | { |
185 | SDL_UnloadObject(this->hidden->libraryHandle); |
186 | |
187 | this->hidden->libraryHandle = NULL; |
188 | this->gl_config.driver_loaded = 0; |
189 | } |
190 | |
191 | void* Mac_GL_GetProcAddress(_THIS, const char *proc) |
192 | { |
193 | return SDL_LoadFunction( this->hidden->libraryHandle, proc ); |
194 | } |
195 | |
196 | #endif /* SDL_VIDEO_OPENGL */ |
197 | |