|
1 /* |
|
2 SDL - Simple DirectMedia Layer |
|
3 Copyright (C) 1997-2004 Sam Lantinga |
|
4 |
|
5 This library is free software; you can redistribute it and/or |
|
6 modify it under the terms of the GNU Library General Public |
|
7 License as published by the Free Software Foundation; either |
|
8 version 2 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 Library General Public License for more details. |
|
14 |
|
15 You should have received a copy of the GNU Library General Public |
|
16 License along with this library; if not, write to the Free |
|
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|
18 |
|
19 Sam Lantinga |
|
20 slouken@libsdl.org |
|
21 */ |
|
22 #include "SDL_config.h" |
|
23 |
|
24 /* |
|
25 File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability |
|
26 23 March 2003 |
|
27 |
|
28 Implements RISC OS display device management. |
|
29 Routines for full screen and wimp modes are split |
|
30 into other source files. |
|
31 */ |
|
32 |
|
33 #include "SDL_video.h" |
|
34 #include "SDL_mouse.h" |
|
35 #include "SDL_syswm.h" |
|
36 #include "../SDL_sysvideo.h" |
|
37 #include "../SDL_pixels_c.h" |
|
38 #include "../../events/SDL_events_c.h" |
|
39 |
|
40 #include "SDL_riscostask.h" |
|
41 #include "SDL_riscosvideo.h" |
|
42 #include "SDL_riscosevents_c.h" |
|
43 #include "SDL_riscosmouse_c.h" |
|
44 |
|
45 #include "kernel.h" |
|
46 #include "swis.h" |
|
47 |
|
48 #define RISCOSVID_DRIVER_NAME "riscos" |
|
49 |
|
50 /* Initialization/Query functions */ |
|
51 static int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat); |
|
52 static void RISCOS_VideoQuit(_THIS); |
|
53 |
|
54 static SDL_Rect **RISCOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
|
55 static SDL_Surface *RISCOS_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
|
56 |
|
57 int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info); |
|
58 |
|
59 int RISCOS_ToggleFullScreen(_THIS, int fullscreen); |
|
60 /* Mouse checking */ |
|
61 void RISCOS_CheckMouseMode(_THIS); |
|
62 extern SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode); |
|
63 |
|
64 /* Fullscreen mode functions */ |
|
65 extern SDL_Surface *FULLSCREEN_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
|
66 extern void FULLSCREEN_BuildModeList(_THIS); |
|
67 extern void FULLSCREEN_SetDeviceMode(_THIS); |
|
68 extern int FULLSCREEN_ToggleFromWimp(_THIS); |
|
69 |
|
70 /* Wimp mode functions */ |
|
71 extern SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
|
72 extern void WIMP_DeleteWindow(_THIS); |
|
73 extern int WIMP_ToggleFromFullScreen(_THIS); |
|
74 |
|
75 /* Hardware surface functions - common to WIMP and FULLSCREEN */ |
|
76 static int RISCOS_AllocHWSurface(_THIS, SDL_Surface *surface); |
|
77 static int RISCOS_LockHWSurface(_THIS, SDL_Surface *surface); |
|
78 static void RISCOS_UnlockHWSurface(_THIS, SDL_Surface *surface); |
|
79 static void RISCOS_FreeHWSurface(_THIS, SDL_Surface *surface); |
|
80 |
|
81 /* RISC OS driver bootstrap functions */ |
|
82 |
|
83 static int RISCOS_Available(void) |
|
84 { |
|
85 return(1); |
|
86 } |
|
87 |
|
88 static void RISCOS_DeleteDevice(SDL_VideoDevice *device) |
|
89 { |
|
90 SDL_free(device->hidden); |
|
91 SDL_free(device); |
|
92 } |
|
93 |
|
94 static SDL_VideoDevice *RISCOS_CreateDevice(int devindex) |
|
95 { |
|
96 SDL_VideoDevice *device; |
|
97 |
|
98 /* Initialize all variables that we clean on shutdown */ |
|
99 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
|
100 if ( device ) { |
|
101 SDL_memset(device, 0, (sizeof *device)); |
|
102 device->hidden = (struct SDL_PrivateVideoData *) |
|
103 SDL_malloc((sizeof *device->hidden)); |
|
104 } |
|
105 if ( (device == NULL) || (device->hidden == NULL) ) { |
|
106 SDL_OutOfMemory(); |
|
107 if ( device ) { |
|
108 SDL_free(device); |
|
109 } |
|
110 return(0); |
|
111 } |
|
112 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
|
113 |
|
114 /* Set the function pointers */ |
|
115 device->VideoInit = RISCOS_VideoInit; |
|
116 device->VideoQuit = RISCOS_VideoQuit; |
|
117 |
|
118 device->ListModes = RISCOS_ListModes; |
|
119 device->SetVideoMode = RISCOS_SetVideoMode; |
|
120 device->CreateYUVOverlay = NULL; |
|
121 device->AllocHWSurface = RISCOS_AllocHWSurface; |
|
122 device->CheckHWBlit = NULL; |
|
123 device->FillHWRect = NULL; |
|
124 device->SetHWColorKey = NULL; |
|
125 device->SetHWAlpha = NULL; |
|
126 device->LockHWSurface = RISCOS_LockHWSurface; |
|
127 device->UnlockHWSurface = RISCOS_UnlockHWSurface; |
|
128 device->FreeHWSurface = RISCOS_FreeHWSurface; |
|
129 |
|
130 device->FreeWMCursor = RISCOS_FreeWMCursor; |
|
131 device->CreateWMCursor = RISCOS_CreateWMCursor; |
|
132 device->CheckMouseMode = RISCOS_CheckMouseMode; |
|
133 device->GrabInput = RISCOS_GrabInput; |
|
134 |
|
135 device->InitOSKeymap = RISCOS_InitOSKeymap; |
|
136 |
|
137 device->GetWMInfo = RISCOS_GetWmInfo; |
|
138 |
|
139 device->free = RISCOS_DeleteDevice; |
|
140 |
|
141 /* Can't get Toggle screen to work if program starts up in Full screen mode so |
|
142 disable it here and re-enable it when a wimp screen is chosen */ |
|
143 device->ToggleFullScreen = NULL; /*RISCOS_ToggleFullScreen;*/ |
|
144 |
|
145 /* Set other entries for fullscreen mode */ |
|
146 FULLSCREEN_SetDeviceMode(device); |
|
147 |
|
148 /* Mouse pointer needs to use the WIMP ShowCursor version so |
|
149 that it doesn't modify the pointer until the SDL Window is |
|
150 entered or the application goes full screen */ |
|
151 device->ShowWMCursor = WIMP_ShowWMCursor; |
|
152 |
|
153 return device; |
|
154 } |
|
155 |
|
156 VideoBootStrap RISCOS_bootstrap = { |
|
157 RISCOSVID_DRIVER_NAME, "RISC OS video driver", |
|
158 RISCOS_Available, RISCOS_CreateDevice |
|
159 }; |
|
160 |
|
161 |
|
162 int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat) |
|
163 { |
|
164 _kernel_swi_regs regs; |
|
165 int vars[4], vals[3]; |
|
166 |
|
167 if (RISCOS_InitTask() == 0) |
|
168 { |
|
169 SDL_SetError("Unable to start task"); |
|
170 return 0; |
|
171 } |
|
172 |
|
173 vars[0] = 9; /* Log base 2 bpp */ |
|
174 vars[1] = 11; /* XWndLimit - num x pixels -1 */ |
|
175 vars[2] = 12; /* YWndLimit - num y pixels -1 */ |
|
176 vars[3] = -1; /* Terminate list */ |
|
177 regs.r[0] = (int)vars; |
|
178 regs.r[1] = (int)vals; |
|
179 |
|
180 _kernel_swi(OS_ReadVduVariables, ®s, ®s); |
|
181 vformat->BitsPerPixel = (1 << vals[0]); |
|
182 |
|
183 /* Determine the current screen size */ |
|
184 this->info.current_w = vals[1] + 1; |
|
185 this->info.current_h = vals[2] + 1; |
|
186 |
|
187 /* Minimum bpp for SDL is 8 */ |
|
188 if (vformat->BitsPerPixel < 8) vformat->BitsPerPixel = 8; |
|
189 |
|
190 |
|
191 switch (vformat->BitsPerPixel) |
|
192 { |
|
193 case 15: |
|
194 case 16: |
|
195 vformat->Bmask = 0x00007c00; |
|
196 vformat->Gmask = 0x000003e0; |
|
197 vformat->Rmask = 0x0000001f; |
|
198 vformat->BitsPerPixel = 16; /* SDL wants actual number of bits used */ |
|
199 vformat->BytesPerPixel = 2; |
|
200 break; |
|
201 |
|
202 case 24: |
|
203 case 32: |
|
204 vformat->Bmask = 0x00ff0000; |
|
205 vformat->Gmask = 0x0000ff00; |
|
206 vformat->Rmask = 0x000000ff; |
|
207 vformat->BytesPerPixel = 4; |
|
208 break; |
|
209 |
|
210 default: |
|
211 vformat->Bmask = 0; |
|
212 vformat->Gmask = 0; |
|
213 vformat->Rmask = 0; |
|
214 vformat->BytesPerPixel = 1; |
|
215 break; |
|
216 } |
|
217 |
|
218 /* Fill in some window manager capabilities */ |
|
219 this->info.wm_available = 1; |
|
220 |
|
221 /* We're done! */ |
|
222 return(0); |
|
223 } |
|
224 |
|
225 /* Note: If we are terminated, this could be called in the middle of |
|
226 another SDL video routine -- notably UpdateRects. |
|
227 */ |
|
228 void RISCOS_VideoQuit(_THIS) |
|
229 { |
|
230 RISCOS_ExitTask(); |
|
231 |
|
232 if (this->hidden->alloc_bank) SDL_free(this->hidden->alloc_bank); |
|
233 this->hidden->alloc_bank = 0; |
|
234 } |
|
235 |
|
236 |
|
237 SDL_Rect **RISCOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
|
238 { |
|
239 if (flags & SDL_FULLSCREEN) |
|
240 { |
|
241 /* Build mode list when first required. */ |
|
242 if (SDL_nummodes[0] == 0) FULLSCREEN_BuildModeList(this); |
|
243 |
|
244 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); |
|
245 } else |
|
246 return (SDL_Rect **)-1; |
|
247 } |
|
248 |
|
249 |
|
250 /* Set up video mode */ |
|
251 SDL_Surface *RISCOS_SetVideoMode(_THIS, SDL_Surface *current, |
|
252 int width, int height, int bpp, Uint32 flags) |
|
253 { |
|
254 if (flags & SDL_FULLSCREEN) |
|
255 { |
|
256 RISCOS_StoreWimpMode(); |
|
257 /* Dump wimp window on switch to full screen */ |
|
258 if (this->hidden->window_handle) WIMP_DeleteWindow(this); |
|
259 |
|
260 return FULLSCREEN_SetVideoMode(this, current, width, height, bpp, flags); |
|
261 } else |
|
262 { |
|
263 RISCOS_RestoreWimpMode(); |
|
264 return WIMP_SetVideoMode(this, current, width, height, bpp, flags); |
|
265 } |
|
266 } |
|
267 |
|
268 |
|
269 /* We don't actually allow hardware surfaces other than the main one */ |
|
270 static int RISCOS_AllocHWSurface(_THIS, SDL_Surface *surface) |
|
271 { |
|
272 return(-1); |
|
273 } |
|
274 static void RISCOS_FreeHWSurface(_THIS, SDL_Surface *surface) |
|
275 { |
|
276 return; |
|
277 } |
|
278 |
|
279 /* We need to wait for vertical retrace on page flipped displays */ |
|
280 static int RISCOS_LockHWSurface(_THIS, SDL_Surface *surface) |
|
281 { |
|
282 return(0); |
|
283 } |
|
284 |
|
285 static void RISCOS_UnlockHWSurface(_THIS, SDL_Surface *surface) |
|
286 { |
|
287 return; |
|
288 } |
|
289 |
|
290 |
|
291 int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info) |
|
292 { |
|
293 SDL_VERSION(&(info->version)); |
|
294 info->wimpVersion = RISCOS_GetWimpVersion(); |
|
295 info->taskHandle = RISCOS_GetTaskHandle(); |
|
296 info->window = this->hidden->window_handle; |
|
297 |
|
298 return 1; |
|
299 } |
|
300 /* Toggle full screen mode. |
|
301 Returns 1 if successful otherwise 0 |
|
302 */ |
|
303 |
|
304 int RISCOS_ToggleFullScreen(_THIS, int fullscreen) |
|
305 { |
|
306 if (fullscreen) |
|
307 { |
|
308 return FULLSCREEN_ToggleFromWimp(this); |
|
309 } else |
|
310 { |
|
311 return WIMP_ToggleFromFullScreen(this); |
|
312 } |
|
313 |
|
314 return 0; |
|
315 } |
|
316 |