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comparison src/video/riscos/SDL_wimpvideo.c @ 630:550bccdf04bd

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Added initial support for RISC OS (thanks Peter Naulls!)
author Sam Lantinga <slouken@libsdl.org>
date Thu, 29 May 2003 04:44:13 +0000
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children 44d574ed4780
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629:3fa401bb4bb5 630:550bccdf04bd
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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@devolution.com
21 */
22
23 /*
24 File added by Alan Buckley (alan_baa@hotmail.com) for RISCOS compatability
25 27 March 2003
26
27 Implements RISCOS wimp display.
28 */
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include "SDL.h"
35 #include "SDL_error.h"
36 #include "SDL_video.h"
37 #include "SDL_mouse.h"
38 #include "SDL_sysvideo.h"
39 #include "SDL_pixels_c.h"
40 #include "SDL_events_c.h"
41
42 #include "SDL_riscostask.h"
43 #include "SDL_riscosvideo.h"
44 #include "SDL_riscosevents_c.h"
45 #include "SDL_riscosmouse_c.h"
46
47 #include "kernel.h"
48 #include "swis.h"
49
50 /* Initialization/Query functions */
51 SDL_Rect **WIMP_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
52 SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
53 int WIMP_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
54 void WIMP_SetWMCaption(_THIS, const char *title, const char *icon);
55
56
57 extern unsigned char *WIMP_CreateBuffer(int width, int height, int bpp);
58 extern void WIMP_PumpEvents(_THIS);
59 extern void WIMP_PlotSprite(_THIS, int x, int y);
60 extern void WIMP_SetupPlotInfo(_THIS);
61 extern void WIMP_SetFocus(int win);
62
63 /* etc. */
64 static void WIMP_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
65
66 /* RISC OS Wimp handling helpers */
67 void WIMP_ReadModeInfo(_THIS);
68 unsigned int WIMP_SetupWindow(_THIS, SDL_Surface *surface);
69 void WIMP_SetDeviceMode(_THIS);
70 void WIMP_DeleteWindow(_THIS);
71
72 /* FULLSCREEN function required for wimp/fullscreen toggling */
73 extern int FULLSCREEN_SetMode(int width, int height, int bpp);
74
75 /* Currently need to set this up here as it only works if you
76 start up in a Wimp mode */
77 extern int RISCOS_ToggleFullScreen(_THIS, int fullscreen);
78
79 extern int riscos_backbuffer;
80 extern int mouseInWindow;
81 extern int riscos_closeaction;
82
83
84 SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current,
85 int width, int height, int bpp, Uint32 flags)
86 {
87 Uint32 Rmask = 0;
88 Uint32 Gmask = 0;
89 Uint32 Bmask = 0;
90 char *buffer = NULL;
91 int bytesPerPixel = 1;
92
93 /* Don't support double buffering in Wimp mode */
94 flags &= ~SDL_DOUBLEBUF;
95 flags &= ~SDL_HWSURFACE;
96
97 switch(bpp)
98 {
99 case 8:
100 /* Emulated palette using ColourTrans */
101 flags |= SDL_HWPALETTE;
102 break;
103
104 case 15:
105 case 16:
106 Bmask = 0x00007c00;
107 Gmask = 0x000003e0;
108 Rmask = 0x0000001f;
109 bytesPerPixel = 2;
110 break;
111
112 case 32:
113 Bmask = 0x00ff0000;
114 Gmask = 0x0000ff00;
115 Rmask = 0x000000ff;
116 bytesPerPixel = 4;
117 break;
118
119 default:
120 SDL_SetError("Pixel depth not supported");
121 return NULL;
122 break;
123 }
124
125 /* printf("Setting mode %dx%d\n", width, height);*/
126
127 /* Allocate the new pixel format for the screen */
128 if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0) ) {
129 SDL_SetError("Couldn't allocate new pixel format for requested mode");
130 return(NULL);
131 }
132
133 /* Set up the new mode framebuffer */
134 current->w = width;
135 this->hidden->height = current->h = height;
136
137 if (bpp == 15) bpp = 16;
138 buffer = WIMP_CreateBuffer(width, height, bpp);
139 if (buffer == NULL)
140 {
141 SDL_SetError("Couldn't create sprite for video memory");
142 return (NULL);
143 }
144
145 this->hidden->bank[0] = buffer + 60; /* Start of sprite data */
146 if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */
147
148 this->hidden->bank[1] = buffer; /* Start of buffer */
149
150 /* Remember sprite buffer so it can be freed later */
151 if (this->hidden->alloc_bank) free(this->hidden->alloc_bank);
152 this->hidden->alloc_bank = buffer;
153
154 current->pitch = width * bytesPerPixel;
155 if ((current->pitch & 3))
156 {
157 /* Sprites are 32bit word aligned */
158 current->pitch += (4 - (current->pitch & 3));
159 }
160
161 current->flags = flags | SDL_PREALLOC;
162
163 WIMP_ReadModeInfo(this);
164
165 memset(this->hidden->bank[0], 0, height * current->pitch);
166
167 this->hidden->current_bank = 0;
168 current->pixels = this->hidden->bank[0];
169
170
171 if (WIMP_SetupWindow(this, current) == 0)
172 {
173 SDL_SetError("Unable to create window to display surface");
174 return NULL;
175 }
176
177 /* Reset device functions for the wimp */
178 WIMP_SetDeviceMode(this);
179
180 /* Needs to set up plot info after window has been created */
181 /* Not sure why, but plots don't work if I do it earlier */
182 WIMP_SetupPlotInfo(this);
183
184 /* We're done */
185 return(current);
186 }
187
188
189 void WIMP_ReadModeInfo(_THIS)
190 {
191 _kernel_swi_regs regs;
192 int vars[6];
193 int vals[5];
194
195 vars[0] = 4; /* XEig */
196 vars[1] = 5; /* YEig */
197 vars[2] = 9; /* Log base 2 bpp */
198 vars[3] = 11; /* Screen Width - 1 */
199 vars[4] = 12; /* Screen Depth - 1 */
200 vars[5] = -1; /* Terminate list */
201
202 regs.r[0] = (int)vars;
203 regs.r[1] = (int)vals;
204 _kernel_swi(OS_ReadVduVariables, &regs, &regs);
205 this->hidden->xeig = vals[0];
206 this->hidden->yeig = vals[1];
207 this->hidden->screen_bpp = 1 << vals[2];
208 this->hidden->screen_width = vals[3] + 1;
209 this->hidden->screen_height = vals[4] + 1;
210 }
211
212 /* Set device function to call the correct versions for running
213 in a wimp window */
214
215 void WIMP_SetDeviceMode(_THIS)
216 {
217 if (this->UpdateRects == WIMP_UpdateRects) return; /* Already set up */
218
219 this->SetColors = WIMP_SetColors;
220 this->UpdateRects = WIMP_UpdateRects;
221
222 this->FlipHWSurface = NULL;
223
224 this->SetCaption = WIMP_SetWMCaption;
225 this->SetIcon = NULL;
226 this->IconifyWindow = NULL;
227
228 this->ShowWMCursor = WIMP_ShowWMCursor;
229 this->WarpWMCursor = WIMP_WarpWMCursor;
230
231 this->ToggleFullScreen = RISCOS_ToggleFullScreen;
232
233 this->PumpEvents = WIMP_PumpEvents;
234 }
235
236 /* Setup the Window to display the surface */
237 unsigned int WIMP_SetupWindow(_THIS, SDL_Surface *surface)
238 {
239 _kernel_swi_regs regs;
240 int window_data[23];
241 int *window_block = window_data+1;
242 int x = (this->hidden->screen_width - surface->w) / 2;
243 int y = (this->hidden->screen_height - surface->h) / 2;
244 int xeig = this->hidden->xeig;
245 int yeig = this->hidden->yeig;
246
247 mouseInWindow = 0;
248
249 /* Always delete the window and recreate on a change */
250 if (this->hidden->window_handle) WIMP_DeleteWindow(this);
251
252 /* Setup window co-ordinates */
253 window_block[0] = x << xeig;
254 window_block[1] = y << yeig;
255 window_block[2] = window_block[0] + (surface->w << xeig);
256 window_block[3] = window_block[1] + (surface->h << yeig);
257
258
259 window_block[4] = 0; /* Scroll offsets */
260 window_block[5] = 0;
261 window_block[6] = -1; /* Open on top of window stack */
262
263 window_block[7] = 0x85040042; /* Window flags */
264 if (riscos_closeaction != 0) window_block[7] |= 0x2000000;
265
266 /* TODO: Take into account surface->flags */
267
268 window_block[8] = 0xff070207; /* Window colours */
269 window_block[9] = 0x000c0103;
270 window_block[10] = 0; /* Work area minimum */
271 window_block[11] = -surface->h << yeig;
272 window_block[12] = surface->w << xeig; /* Work area maximum */
273 window_block[13] = 0;
274 window_block[14] = 0x2700013d; /* Title icon flags */
275 window_block[15] = 0x00003000; /* Work area flags - Mouse click down reported */
276 window_block[16] = 1; /* Sprite area control block pointer */
277 window_block[17] = 0x00100010; /* Minimum window size (width & height) (16x16)*/
278 window_block[18] = (int)this->hidden->title; /* Title data */
279 window_block[19] = -1;
280 window_block[20] = 256;
281 window_block[21] = 0; /* Number of icons */
282
283 regs.r[1] = (unsigned int)(window_block);
284
285 /* Create the window */
286 if (_kernel_swi(Wimp_CreateWindow, &regs, &regs) == NULL)
287 {
288 this->hidden->window_handle = window_data[0] = regs.r[0];
289
290 /* Show the window on the screen */
291 regs.r[1] = (unsigned int)window_data;
292 if (_kernel_swi(Wimp_OpenWindow, &regs, &regs) == NULL)
293 {
294 WIMP_SetFocus(this->hidden->window_handle);
295 } else
296 {
297 WIMP_DeleteWindow(this);
298 }
299 }
300
301 return this->hidden->window_handle;
302 }
303
304 /* Destroy the Window */
305
306 void WIMP_DeleteWindow(_THIS)
307 {
308 _kernel_swi_regs regs;
309 regs.r[1] = (unsigned int)&(this->hidden->window_handle);
310 _kernel_swi(Wimp_DeleteWindow, &regs, &regs);
311 this->hidden->window_handle = 0;
312 }
313
314
315 void WIMP_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
316 {
317 _kernel_swi_regs regs;
318 int update_block[12];
319 int xeig = this->hidden->xeig;
320 int yeig = this->hidden->yeig;
321 int j;
322 update_block[0] = this->hidden->window_handle;
323
324 for (j = 0; j < numrects; j++)
325 {
326 update_block[1] = rects[j].x << xeig; /* Min X */
327 update_block[4] = -(rects[j].y << yeig);
328 update_block[3] = update_block[1] + (rects[j].w << xeig);
329 update_block[2] = update_block[4] - (rects[j].h << yeig);
330
331 regs.r[1] = (int)update_block;
332 /* Update window can fail if called before first poll */
333 if (_kernel_swi(Wimp_UpdateWindow, &regs, &regs) == 0)
334 {
335 while (regs.r[0])
336 {
337 WIMP_PlotSprite(this, update_block[1], update_block[2]);
338 _kernel_swi(Wimp_GetRectangle, &regs, &regs);
339 }
340 }
341 }
342 }
343
344
345 int WIMP_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
346 {
347 unsigned int *pal = (unsigned int *)(this->hidden->bank[1]+60);
348 int j;
349 SDL_Rect update;
350
351 pal += firstcolor*2;
352 for (j = 0; j < ncolors; j++)
353 {
354 *pal = (((unsigned int)colors->r) << 8)
355 + (((unsigned int)colors->g) << 16)
356 + (((unsigned int)colors->b) << 24);
357 pal[1] = *pal;
358 pal += 2;
359 colors++;
360 }
361
362 WIMP_SetupPlotInfo(this);
363
364 /* Need to refresh the window */
365 update.x = 0;
366 update.y = 0;
367 update.w = SDL_VideoSurface->w;
368 update.h = SDL_VideoSurface->h;
369 WIMP_UpdateRects(this, 1, &update);
370
371 return 1;
372 }
373
374 void WIMP_SetWMCaption(_THIS, const char *title, const char *icon)
375 {
376 _kernel_swi_regs regs;
377
378 strncpy(this->hidden->title, title, 255);
379 this->hidden->title[255] = 0;
380
381 if (RISCOS_GetWimpVersion() < 380)
382 {
383 int block[6];
384
385 regs.r[1] = (int)block;
386 _kernel_swi(Wimp_GetCaretPosition, &regs, &regs);
387 if (block[0] == (int)this->hidden->window_handle)
388 {
389 regs.r[0] = -1;
390 _kernel_swi(Wimp_SetCaretPosition, &regs,&regs);
391 } else
392 {
393 regs.r[0] = this->hidden->window_handle;
394 regs.r[1] = -1;
395 regs.r[2] = -1;
396 regs.r[3] = -1;
397 _kernel_swi(Wimp_SetCaretPosition, &regs,&regs);
398 }
399 regs.r[0] = block[0];
400 regs.r[1] = block[1];
401 regs.r[2] = block[2];
402 regs.r[3] = block[3];
403 regs.r[4] = block[4];
404 regs.r[5] = block[5];
405 _kernel_swi(Wimp_SetCaretPosition, &regs,&regs);
406 } else
407 {
408 regs.r[0] = this->hidden->window_handle;
409 regs.r[1] = 0x4b534154; /* "TASK" */
410 regs.r[2] = 3; /* Redraw title */
411 _kernel_swi(Wimp_ForceRedraw, &regs, &regs);
412 }
413 }
414
415 void WIMP_RefreshDesktop(_THIS)
416 {
417 int width = this->hidden->screen_width << this->hidden->xeig;
418 int height = this->hidden->screen_height << this->hidden->yeig;
419 _kernel_swi_regs regs;
420 regs.r[0] = -1; /* Whole screen */
421 regs.r[1] = 0;
422 regs.r[2] = 0;
423 regs.r[3] = width;
424 regs.r[4] = height;
425 _kernel_swi(Wimp_ForceRedraw, &regs, &regs);
426 }
427
428 /* Toggle to window from full screen */
429 int WIMP_ToggleFromFullScreen(_THIS)
430 {
431 int width = this->screen->w;
432 int height = this->screen->h;
433 int bpp = this->screen->format->BitsPerPixel;
434 char *buffer = NULL;
435 char *old_bank[2];
436 char *old_alloc_bank;
437
438 /* Ensure flags are OK */
439 this->screen->flags &= ~(SDL_DOUBLEBUF|SDL_HWSURFACE);
440
441 if (this->hidden->bank[0] == this->hidden->alloc_bank || riscos_backbuffer == 0)
442 {
443 /* Need to create a sprite for the screen and copy the data to it */
444 char *data;
445 buffer = WIMP_CreateBuffer(width, height, bpp);
446 data = buffer + 60; /* Start of sprite data */
447 if (bpp == 8) data += 2048; /* 8bpp sprite have palette first */
448
449 if (buffer == NULL) return 0;
450 memcpy(data, this->hidden->bank[0], width * height * this->screen->format->BytesPerPixel);
451 }
452 /* else We've switch to full screen before so we already have a sprite */
453
454 old_bank[0] = this->hidden->bank[0];
455 old_bank[1] = this->hidden->bank[1];
456 old_alloc_bank = this->hidden->alloc_bank;
457
458 if (buffer != NULL) this->hidden->alloc_bank = buffer;
459
460 this->hidden->bank[1] = this->hidden->alloc_bank;
461 this->hidden->bank[0] = this->hidden->bank[1] + 60; /* Start of sprite data */
462 if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */
463
464 this->hidden->current_bank = 0;
465 this->screen->pixels = this->hidden->bank[0];
466
467 RISCOS_RestoreWimpMode();
468 WIMP_ReadModeInfo(this);
469 if (WIMP_SetupWindow(this, this->screen))
470 {
471 WIMP_SetDeviceMode(this);
472 WIMP_SetupPlotInfo(this);
473
474 riscos_backbuffer = 1;
475
476 if (buffer && old_alloc_bank) free(old_alloc_bank);
477
478 return 1;
479 } else
480 {
481 /* Drop back to full screen mode on failure */
482 this->hidden->bank[0] = old_bank[0];
483 this->hidden->bank[1] = old_bank[1];
484 this->hidden->alloc_bank = old_alloc_bank;
485 if (buffer) free(buffer);
486
487 RISCOS_StoreWimpMode();
488 FULLSCREEN_SetMode(width, height, bpp);
489 }
490
491 return 0;
492 }