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comparison src/video/uikit/SDL_uikitopengles.m @ 2765:f55c87ae336b

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Final merge of Google Summer of Code 2008 work... Bring SDL to iPhone and iPod Touch by Holmes Futrell, mentored by Sam Lantinga
author Sam Lantinga <slouken@libsdl.org>
date Sat, 04 Oct 2008 06:46:59 +0000
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children 99210400e8b9
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2764:4868c0df2e83 2765:f55c87ae336b
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 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
23 #include "SDL_uikitopengles.h"
24 #include "SDL_uikitopenglview.h"
25 #include "SDL_uikitappdelegate.h"
26 #include "SDL_uikitwindow.h"
27 #include "jumphack.h"
28 #include "SDL_sysvideo.h"
29 #include "SDL_loadso.h"
30 #include <dlfcn.h>
31
32 static int UIKit_GL_Initialize(_THIS);
33
34 void *
35 UIKit_GL_GetProcAddress(_THIS, const char *proc)
36 {
37 /* Look through all SO's for the proc symbol. Here's why:
38 -Looking for the path to the OpenGL Library seems not to work in the iPhone Simulator.
39 -We don't know that the path won't change in the future.
40 */
41 return SDL_LoadFunction(RTLD_DEFAULT, proc);
42 }
43
44 /*
45 note that SDL_GL_Delete context makes it current without passing the window
46 */
47 int UIKit_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
48 {
49
50 if (context) {
51 SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
52 [data->view setCurrentContext];
53 }
54 else {
55 [EAGLContext setCurrentContext: nil];
56 }
57
58 return 0;
59 }
60
61 int
62 UIKit_GL_LoadLibrary(_THIS, const char *path)
63 {
64 /*
65 shouldn't be passing a path into this function
66 why? Because we've already loaded the library
67 and because the SDK forbids loading an external SO
68 */
69 if (path != NULL) {
70 SDL_SetError("iPhone GL Load Library just here for compatibility");
71 return -1;
72 }
73 return 0;
74 }
75
76
77 void UIKit_GL_SwapWindow(_THIS, SDL_Window * window)
78 {
79
80 SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
81
82 if (nil == data->view) {
83 return;
84 }
85 [data->view swapBuffers];
86 /* since now we've got something to draw
87 make the window visible */
88 [data->uiwindow makeKeyAndVisible];
89
90 /* we need to let the event cycle run, or the OS won't update the OpenGL view! */
91 SDL_PumpEvents();
92
93 }
94
95 SDL_GLContext UIKit_GL_CreateContext(_THIS, SDL_Window * window)
96 {
97
98 SDL_uikitopenglview *view;
99
100 SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
101
102 /* construct our view, passing in SDL's OpenGL configuration data */
103 view = [[SDL_uikitopenglview alloc] initWithFrame: [[UIScreen mainScreen] applicationFrame] \
104 retainBacking: _this->gl_config.retained_backing \
105 rBits: _this->gl_config.red_size \
106 gBits: _this->gl_config.green_size \
107 bBits: _this->gl_config.blue_size \
108 aBits: _this->gl_config.alpha_size \
109 depthBits: _this->gl_config.depth_size];
110
111 data->view = view;
112
113 /* add the view to our window */
114 [data->uiwindow addSubview: view ];
115
116 /* Don't worry, the window retained the view */
117 [view release];
118
119 if ( UIKit_GL_MakeCurrent(_this, window, view) < 0 ) {
120 UIKit_GL_DeleteContext(_this, view);
121 return NULL;
122 }
123
124 return view;
125 }
126
127 void UIKit_GL_DeleteContext(_THIS, SDL_GLContext context)
128 {
129 /* the delegate has retained the view, this will release him */
130 SDL_uikitopenglview *view = (SDL_uikitopenglview *)context;
131 /* this will also delete it */
132 [view removeFromSuperview];
133
134 return;
135 }
136
137