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root/cebix/BasiliskII/src/AmigaOS/video_amiga.cpp

Comparing BasiliskII/src/AmigaOS/video_amiga.cpp (file contents):
Revision 1.12 by cebix, 2001-02-02T20:52:57Z vs.
Revision 1.23 by cebix, 2002-03-10T20:17:14Z

#	Line 1 | Line 1
1		/*
2		*  video_amiga.cpp - Video/graphics emulation, AmigaOS specific stuff
3		*
4	<	*  Basilisk II (C) 1997-2001 Christian Bauer
4	>	*  Basilisk II (C) 1997-2002 Christian Bauer
5		*
6		*  This program is free software; you can redistribute it and/or modify
7		*  it under the terms of the GNU General Public License as published by
#	Line 62 | Line 62 | static UWORD *null_pointer = NULL;                             //
62		static UWORD *current_pointer = (UWORD *)-1;    // Currently visible mouse pointer data
63		static LONG black_pen = -1, white_pen = -1;
64		static struct Process *periodic_proc = NULL;    // Periodic process
65	+	static int window_width, window_height;         // width and height for window display
66	+	static ULONG screen_mode_id;                    // mode ID for screen display
67
68		extern struct Task *MainTask;                                   // Pointer to main task (from main_amiga.cpp)
69
#	Line 88 | Line 90 | static const uint8 keycode2mac[0x80] = {
90
91
92		// Prototypes
93	+	static bool video_open(const video_mode &mode);
94	+	static void video_close();
95		static void periodic_func(void);
96	+	static void add_mode(uint32 width, uint32 height, uint32 resolution_id, uint32 bytes_per_row, video_depth depth);
97	+	static void add_modes(uint32 width, uint32 height, video_depth depth);
98	+	static ULONG find_mode_for_depth(uint32 width, uint32 height, uint32 depth);
99	+	static ULONG bits_from_depth(video_depth depth);
100	+	static bool is_valid_modeid(int display_type, ULONG mode_id);
101	+	static bool check_modeid_p96(ULONG mode_id);
102	+	static bool check_modeid_cgfx(ULONG mode_id);
103
104
105		/*
106		*  Initialization
107		*/
108
109	+
110		// Open window
111		static bool init_window(int width, int height)
112		{
#	Line 117 | Line 129 | static bool init_window(int width, int h
129		TAG_END
130		);
131		if (the_win == NULL) {
132	<	ErrorAlert(GetString(STR_OPEN_WINDOW_ERR));
132	>	ErrorAlert(STR_OPEN_WINDOW_ERR);
133		return false;
134		}
135
136		// Create bitmap ("height + 2" for safety)
137		the_bitmap = AllocBitMap(width, height + 2, 1, BMF_CLEAR, NULL);
138		if (the_bitmap == NULL) {
139	<	ErrorAlert(GetString(STR_NO_MEM_ERR));
139	>	ErrorAlert(STR_NO_MEM_ERR);
140		return false;
141		}
142
143	<	// Set VideoMonitor
143	>	// Add resolution and set VideoMonitor
144		VideoMonitor.mac_frame_base = (uint32)the_bitmap->Planes[0];
133	–	VideoMonitor.bytes_per_row = the_bitmap->BytesPerRow;
134	–	VideoMonitor.x = width;
135	–	VideoMonitor.y = height;
136	–	VideoMonitor.mode = VMODE_1BIT;
145
146		// Set FgPen and BgPen
147		black_pen = ObtainBestPenA(the_win->WScreen->ViewPort.ColorMap, 0, 0, 0, NULL);
#	Line 172 | Line 180 | static bool init_pip(int width, int heig
180		TAG_END
181		);
182		if (the_win == NULL || error) {
183	<	ErrorAlert(GetString(STR_OPEN_WINDOW_ERR));
183	>	ErrorAlert(STR_OPEN_WINDOW_ERR);
184		return false;
185		}
186
187		// Find bitmap
188		p96PIP_GetTags(the_win, P96PIP_SourceBitMap, (ULONG)&the_bitmap, TAG_END);
189
190	<	// Set VideoMonitor
190	>	// Add resolution and set VideoMonitor
191		VideoMonitor.mac_frame_base = p96GetBitMapAttr(the_bitmap, P96BMA_MEMORY);
192	<	VideoMonitor.bytes_per_row = p96GetBitMapAttr(the_bitmap, P96BMA_BYTESPERROW);
185	<	VideoMonitor.x = width;
186	<	VideoMonitor.y = height;
187	<	VideoMonitor.mode = VMODE_16BIT;
192	>
193		return true;
194		}
195
#	Line 195 | Line 200 | static bool init_screen_p96(ULONG mode_i
200		ADBSetRelMouseMode(true);
201
202		// Check if the mode is one we can handle
203	<	uint32 depth = p96GetModeIDAttr(mode_id, P96IDA_DEPTH);
204	<	uint32 format = p96GetModeIDAttr(mode_id, P96IDA_RGBFORMAT);
205	<
206	<	switch (depth) {
207	<	case 8:
203	<	VideoMonitor.mode = VMODE_8BIT;
204	<	break;
205	<	case 15:
206	<	case 16:
207	<	if (format != RGBFB_R5G5B5) {
208	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
209	<	return false;
210	<	}
211	<	VideoMonitor.mode = VMODE_16BIT;
212	<	break;
213	<	case 24:
214	<	case 32:
215	<	if (format != RGBFB_A8R8G8B8) {
216	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
217	<	return false;
218	<	}
219	<	VideoMonitor.mode = VMODE_32BIT;
220	<	break;
221	<	default:
222	<	ErrorAlert(GetString(STR_WRONG_SCREEN_DEPTH_ERR));
223	<	return false;
224	<	}
203	>	if (!check_modeid_p96(mode_id))
204	>	{
205	>	ErrorAlert(STR_WRONG_SCREEN_FORMAT_ERR);
206	>	return false;
207	>	}
208
209		// Yes, get width and height
210	+	uint32 depth = p96GetModeIDAttr(mode_id, P96IDA_DEPTH);
211		uint32 width = p96GetModeIDAttr(mode_id, P96IDA_WIDTH);
212		uint32 height = p96GetModeIDAttr(mode_id, P96IDA_HEIGHT);
213
230	–	VideoMonitor.x = width;
231	–	VideoMonitor.y = height;
232	–
214		// Open screen
215		the_screen = p96OpenScreenTags(
216		P96SA_DisplayID, mode_id,
#	Line 241 | Line 222 | static bool init_screen_p96(ULONG mode_i
222		TAG_END
223		);
224		if (the_screen == NULL) {
225	<	ErrorAlert(GetString(STR_OPEN_SCREEN_ERR));
225	>	ErrorAlert(STR_OPEN_SCREEN_ERR);
226		return false;
227		}
228
#	Line 249 | Line 230 | static bool init_screen_p96(ULONG mode_i
230		the_win = OpenWindowTags(NULL,
231		WA_Left, 0, WA_Top, 0,
232		WA_Width, width, WA_Height, height,
233	+	WA_SimpleRefresh, TRUE,
234		WA_NoCareRefresh, TRUE,
235		WA_Borderless, TRUE,
236		WA_Activate, TRUE,
#	Line 258 | Line 240 | static bool init_screen_p96(ULONG mode_i
240		TAG_END
241		);
242		if (the_win == NULL) {
243	<	ErrorAlert(GetString(STR_OPEN_WINDOW_ERR));
243	>	ErrorAlert(STR_OPEN_WINDOW_ERR);
244		return false;
245		}
246
265	–	// Set VideoMonitor
247		ScreenToFront(the_screen);
248	+
249	+	// Add resolution and set VideoMonitor
250		VideoMonitor.mac_frame_base = p96GetBitMapAttr(the_screen->RastPort.BitMap, P96BMA_MEMORY);
251	<	VideoMonitor.bytes_per_row = p96GetBitMapAttr(the_screen->RastPort.BitMap, P96BMA_BYTESPERROW);
251	>
252		return true;
253		}
254
#	Line 276 | Line 259 | static bool init_screen_cgfx(ULONG mode_
259		ADBSetRelMouseMode(true);
260
261		// Check if the mode is one we can handle
262	<	uint32 depth = GetCyberIDAttr(CYBRIDATTR_DEPTH, mode_id);
263	<	uint32 format = GetCyberIDAttr(CYBRIDATTR_PIXFMT, mode_id);
264	<
265	<	switch (depth) {
266	<	case 8:
284	<	VideoMonitor.mode = VMODE_8BIT;
285	<	break;
286	<	case 15:
287	<	case 16:
288	<	// !!! PIXFMT_RGB15 is correct !!!
289	<	if (format != PIXFMT_RGB15) {
290	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
291	<	return false;
292	<	}
293	<	VideoMonitor.mode = VMODE_16BIT;
294	<	break;
295	<	case 24:
296	<	case 32:
297	<	if (format != PIXFMT_ARGB32) {
298	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
299	<	return false;
300	<	}
301	<	VideoMonitor.mode = VMODE_32BIT;
302	<	break;
303	<	default:
304	<	ErrorAlert(GetString(STR_WRONG_SCREEN_DEPTH_ERR));
305	<	return false;
306	<	}
262	>	if (!check_modeid_cgfx(mode_id))
263	>	{
264	>	ErrorAlert(STR_WRONG_SCREEN_FORMAT_ERR);
265	>	return false;
266	>	}
267
268		// Yes, get width and height
269	+	uint32 depth = GetCyberIDAttr(CYBRIDATTR_DEPTH, mode_id);
270		uint32 width = GetCyberIDAttr(CYBRIDATTR_WIDTH, mode_id);
271		uint32 height = GetCyberIDAttr(CYBRIDATTR_HEIGHT, mode_id);
272
312	–	VideoMonitor.x = width;
313	–	VideoMonitor.y = height;
314	–
273		// Open screen
274		the_screen = OpenScreenTags(NULL,
275		SA_DisplayID, mode_id,
#	Line 321 | Line 279 | static bool init_screen_cgfx(ULONG mode_
279		TAG_END
280		);
281		if (the_screen == NULL) {
282	<	ErrorAlert(GetString(STR_OPEN_SCREEN_ERR));
282	>	ErrorAlert(STR_OPEN_SCREEN_ERR);
283		return false;
284		}
285
#	Line 329 | Line 287 | static bool init_screen_cgfx(ULONG mode_
287		the_win = OpenWindowTags(NULL,
288		WA_Left, 0, WA_Top, 0,
289		WA_Width, width, WA_Height, height,
290	+	WA_SimpleRefresh, TRUE,
291		WA_NoCareRefresh, TRUE,
292		WA_Borderless, TRUE,
293		WA_Activate, TRUE,
#	Line 338 | Line 297 | static bool init_screen_cgfx(ULONG mode_
297		TAG_END
298		);
299		if (the_win == NULL) {
300	<	ErrorAlert(GetString(STR_OPEN_WINDOW_ERR));
300	>	ErrorAlert(STR_OPEN_WINDOW_ERR);
301		return false;
302		}
303
345	–	// Set VideoMonitor
304		ScreenToFront(the_screen);
305		static UWORD ptr[] = { 0, 0, 0, 0 };
306		SetPointer(the_win, ptr, 0, 0, 0, 0);   // Hide mouse pointer
307	+
308	+	// Set VideoMonitor
309	+	ULONG frame_base;
310		APTR handle = LockBitMapTags(the_screen->RastPort.BitMap,
311	<	LBMI_BASEADDRESS, (ULONG)&VideoMonitor.mac_frame_base,
312	<	TAG_END);
311	>	LBMI_BASEADDRESS, (ULONG)&frame_base,
312	>	TAG_END
313	>	);
314		UnLockBitMap(handle);
315	<	VideoMonitor.bytes_per_row = GetCyberMapAttr(the_screen->RastPort.BitMap, CYBRMATTR_XMOD);
315	>
316	>	VideoMonitor.mac_frame_base = frame_base;
317	>
318		return true;
319		}
320
321		bool VideoInit(bool classic)
322		{
323	+	int default_width, default_height, default_depth;
324	+
325		// Allocate blank mouse pointer data
326		null_pointer = (UWORD *)AllocMem(12, MEMF_PUBLIC | MEMF_CHIP | MEMF_CLEAR);
327		if (null_pointer == NULL) {
328	<	ErrorAlert(GetString(STR_NO_MEM_ERR));
328	>	ErrorAlert(STR_NO_MEM_ERR);
329		return false;
330		}
331
#	Line 377 | Line 343 | bool VideoInit(bool classic)
343
344		// Determine type and mode
345		display_type = DISPLAY_WINDOW;
346	<	int width = 512, height = 384;
347	<	ULONG mode_id = 0;
346	>
347	>	default_width = window_width = 512;
348	>	default_height = window_height = 384;
349	>
350		if (mode_str) {
351	<	if (sscanf(mode_str, "win/%d/%d", &width, &height) == 2)
351	>	if (sscanf(mode_str, "win/%d/%d", &window_width, &window_height) == 2)
352		display_type = DISPLAY_WINDOW;
353	<	else if (sscanf(mode_str, "pip/%d/%d", &width, &height) == 2 && P96Base)
353	>	else if (sscanf(mode_str, "pip/%d/%d", &window_width, &window_height) == 2 && P96Base)
354		display_type = DISPLAY_PIP;
355	<	else if (sscanf(mode_str, "scr/%08lx", &mode_id) == 1 && (CyberGfxBase || P96Base)) {
356	<	if (P96Base && p96GetModeIDAttr(mode_id, P96IDA_ISP96))
355	>	else if (sscanf(mode_str, "scr/%08lx", &screen_mode_id) == 1 && (CyberGfxBase || P96Base)) {
356	>	if (P96Base && p96GetModeIDAttr(screen_mode_id, P96IDA_ISP96))
357		display_type = DISPLAY_SCREEN_P96;
358	<	else if (CyberGfxBase && IsCyberModeID(mode_id))
358	>	else if (CyberGfxBase && IsCyberModeID(screen_mode_id))
359		display_type = DISPLAY_SCREEN_CGFX;
360		else {
361	<	ErrorAlert(GetString(STR_NO_P96_MODE_ERR));
361	>	ErrorAlert(STR_NO_P96_MODE_ERR);
362	>	return false;
363	>	}
364	>	}
365	>	}
366	>
367	>	D(bug("display_type %d, window_width %d, window_height %d\n", display_type, window_width, window_height));
368	>
369	>	// Construct list of supported modes
370	>	switch (display_type) {
371	>	case DISPLAY_WINDOW:
372	>	default_width = window_width;
373	>	default_height = window_height;
374	>	default_depth = 1;
375	>	add_modes(window_width, window_height, VDEPTH_1BIT);
376	>	break;
377	>
378	>	case DISPLAY_PIP:
379	>	default_depth = 16;
380	>	default_width = window_width;
381	>	default_height = window_height;
382	>	add_modes(window_width, window_height, VDEPTH_16BIT);
383	>	break;
384	>
385	>	case DISPLAY_SCREEN_P96:
386	>	case DISPLAY_SCREEN_CGFX:
387	>	struct DimensionInfo dimInfo;
388	>	DisplayInfoHandle handle = FindDisplayInfo(screen_mode_id);
389	>
390	>	if (handle == NULL)
391		return false;
392	+
393	+	if (GetDisplayInfoData(handle, (UBYTE *) &dimInfo, sizeof(dimInfo), DTAG_DIMS, 0) <= 0)
394	+	return false;
395	+
396	+	default_width = 1 + dimInfo.Nominal.MaxX - dimInfo.Nominal.MinX;
397	+	default_height = 1 + dimInfo.Nominal.MaxY - dimInfo.Nominal.MinY;
398	+	default_depth = dimInfo.MaxDepth;
399	+
400	+	for (unsigned d=VDEPTH_8BIT; d<=VDEPTH_32BIT; d++) {
401	+	ULONG mode_id = find_mode_for_depth(default_width, default_height, bits_from_depth(video_depth(d)));
402	+
403	+	if (is_valid_modeid(display_type, mode_id))
404	+	add_modes(default_width, default_height, video_depth(d));
405		}
406	+	break;
407	+	}
408	+
409	+	video_init_depth_list();
410	+
411	+	#if DEBUG
412	+	bug("Available video modes:\n");
413	+	vector<video_mode>::const_iterator i = VideoModes.begin(), end = VideoModes.end();
414	+	while (i != end) {
415	+	bug(" %dx%d (ID %02x), %d colors\n", i->x, i->y, i->resolution_id, 1 << bits_from_depth(i->depth));
416	+	++i;
417	+	}
418	+	#endif
419	+
420	+	D(bug("VideoInit: def_width=%ld  def_height=%ld  def_depth=%ld\n", default_width, default_height, default_depth));
421	+
422	+	// Find requested default mode and open display
423	+	if (VideoModes.size() == 1)
424	+	return video_open(VideoModes[0]);
425	+	else {
426	+	// Find mode with specified dimensions
427	+	std::vector<video_mode>::const_iterator i, end = VideoModes.end();
428	+	for (i = VideoModes.begin(); i != end; ++i) {
429	+	D(bug("VideoInit: w=%ld  h=%ld  d=%ld\n", i->x, i->y, bits_from_depth(i->depth)));
430	+	if (i->x == default_width && i->y == default_height && bits_from_depth(i->depth) == default_depth)
431	+	return video_open(*i);
432		}
433	+	return video_open(VideoModes[0]);
434	+	}
435	+
436	+	return true;
437	+	}
438	+
439	+
440	+	static bool video_open(const video_mode &mode)
441	+	{
442	+	ULONG depth_bits = bits_from_depth(mode.depth);
443	+	ULONG ID = find_mode_for_depth(mode.x, mode.y, depth_bits);
444	+
445	+	D(bug("video_open: width=%ld  height=%ld  depth=%ld  ID=%08lx\n", mode.x, mode.y, depth_bits, ID));
446	+
447	+	if (ID == INVALID_ID) {
448	+	ErrorAlert(STR_NO_VIDEO_MODE_ERR);
449	+	return false;
450		}
451
452	+	VideoMonitor.mode = mode;
453	+
454		// Open display
455		switch (display_type) {
456		case DISPLAY_WINDOW:
457	<	if (!init_window(width, height))
457	>	if (!init_window(mode.x, mode.y))
458		return false;
459		break;
460
461		case DISPLAY_PIP:
462	<	if (!init_pip(width, height))
462	>	if (!init_pip(mode.x, mode.y))
463		return false;
464		break;
465
466		case DISPLAY_SCREEN_P96:
467	<	if (!init_screen_p96(mode_id))
467	>	if (!init_screen_p96(ID))
468		return false;
469		break;
470
471		case DISPLAY_SCREEN_CGFX:
472	<	if (!init_screen_cgfx(mode_id))
472	>	if (!init_screen_cgfx(ID))
473		return false;
474		break;
475		}
#	Line 427 | Line 482 | bool VideoInit(bool classic)
482		TAG_END
483		);
484		if (periodic_proc == NULL) {
485	<	ErrorAlert(GetString(STR_NO_MEM_ERR));
485	>	ErrorAlert(STR_NO_MEM_ERR);
486		return false;
487		}
488	+
489		return true;
490		}
491
492
493	<	/*
438	<	*  Deinitialization
439	<	*/
440	<
441	<	void VideoExit(void)
493	>	static void video_close()
494		{
495		// Stop periodic process
496		if (periodic_proc) {
#	Line 463 | Line 515 | void VideoExit(void)
515		ReleasePen(the_win->WScreen->ViewPort.ColorMap, white_pen);
516
517		CloseWindow(the_win);
518	+	the_win = NULL;
519		}
520		break;
521
#	Line 477 | Line 530 | void VideoExit(void)
530
531		// Close window
532		if (the_win)
533	+	{
534		CloseWindow(the_win);
535	+	the_win = NULL;
536	+	}
537
538		// Close screen
539		if (the_screen) {
#	Line 490 | Line 546 | void VideoExit(void)
546
547		// Close window
548		if (the_win)
549	+	{
550		CloseWindow(the_win);
551	+	the_win = NULL;
552	+	}
553
554		// Close screen
555		if (the_screen) {
#	Line 509 | Line 568 | void VideoExit(void)
568
569
570		/*
571	+	*  Deinitialization
572	+	*/
573	+
574	+	void VideoExit(void)
575	+	{
576	+	video_close();
577	+	}
578	+
579	+
580	+	/*
581		*  Set palette
582		*/
583
584	<	void video_set_palette(uint8 *pal)
584	>	void video_set_palette(uint8 *pal, int num)
585		{
586	<	if (display_type == DISPLAY_SCREEN_P96 || display_type == DISPLAY_SCREEN_CGFX) {
586	>	if ((display_type == DISPLAY_SCREEN_P96 || display_type == DISPLAY_SCREEN_CGFX)
587	>	&& !IsDirectMode(VideoMonitor.mode)) {
588
589		// Convert palette to 32 bits
590		ULONG table[2 + 256 * 3];
591	<	table[0] = 256 << 16;
592	<	table[256 * 3 + 1] = 0;
593	<	for (int i=0; i<256; i++) {
591	>	table[0] = num << 16;
592	>	table[num * 3 + 1] = 0;
593	>	for (int i=0; i<num; i++) {
594		table[i*3+1] = pal[i*3] * 0x01010101;
595		table[i*3+2] = pal[i*3+1] * 0x01010101;
596		table[i*3+3] = pal[i*3+2] * 0x01010101;
#	Line 533 | Line 603 | void video_set_palette(uint8 *pal)
603
604
605		/*
606	+	*  Switch video mode
607	+	*/
608	+
609	+	void video_switch_to_mode(const video_mode &mode)
610	+	{
611	+	// Close and reopen display
612	+	video_close();
613	+	if (!video_open(mode)) {
614	+	ErrorAlert(STR_OPEN_WINDOW_ERR);
615	+	QuitEmulator();
616	+	}
617	+	}
618	+
619	+
620	+	/*
621	+	*  Close down full-screen mode (if bringing up error alerts is unsafe while in full-screen mode)
622	+	*/
623	+
624	+	void VideoQuitFullScreen(void)
625	+	{
626	+	}
627	+
628	+
629	+	/*
630		*  Video message handling (not neccessary under AmigaOS, handled by periodic_func())
631		*/
632
#	Line 590 | Line 684 | static __saveds void periodic_func(void)
684
685		// Timer tick, update display
686		BltTemplate(the_bitmap->Planes[0], 0, the_bitmap->BytesPerRow, the_win->RPort,
687	<	the_win->BorderLeft, the_win->BorderTop, VideoMonitor.x, VideoMonitor.y);
687	>	the_win->BorderLeft, the_win->BorderTop, VideoMonitor.mode.x, VideoMonitor.mode.y);
688
689		// Restart timer
690		timer_io->tr_node.io_Command = TR_ADDREQUEST;
#	Line 621 | Line 715 | static __saveds void periodic_func(void)
715		ADBMouseMoved(mx - the_win->BorderLeft, my - the_win->BorderTop);
716		if (mx < the_win->BorderLeft
717		|| my < the_win->BorderTop
718	<	|| mx >= the_win->BorderLeft + VideoMonitor.x
719	<	|| my >= the_win->BorderTop + VideoMonitor.y) {
718	>	|| mx >= the_win->BorderLeft + VideoMonitor.mode.x
719	>	|| my >= the_win->BorderTop + VideoMonitor.mode.y) {
720		if (current_pointer) {
721		ClearPointer(the_win);
722		current_pointer = NULL;
#	Line 703 | Line 797 | static __saveds void periodic_func(void)
797		Forbid();
798		Signal(MainTask, SIGF_SINGLE);
799		}
800	+
801	+
802	+	// Add mode to list of supported modes
803	+	static void add_mode(uint32 width, uint32 height, uint32 resolution_id, uint32 bytes_per_row, video_depth depth)
804	+	{
805	+	video_mode mode;
806	+	mode.x = width;
807	+	mode.y = height;
808	+	mode.resolution_id = resolution_id;
809	+	mode.bytes_per_row = bytes_per_row;
810	+	mode.depth = depth;
811	+
812	+	D(bug("Added video mode: w=%ld  h=%ld  d=%ld\n", width, height, depth));
813	+
814	+	VideoModes.push_back(mode);
815	+	}
816	+
817	+	// Add standard list of modes for given color depth
818	+	static void add_modes(uint32 width, uint32 height, video_depth depth)
819	+	{
820	+	D(bug("add_modes: w=%ld  h=%ld  d=%ld\n", width, height, depth));
821	+
822	+	if (width >= 512 && height >= 384)
823	+	add_mode(512, 384, 0x80, TrivialBytesPerRow(512, depth), depth);
824	+	if (width >= 640 && height >= 480)
825	+	add_mode(640, 480, 0x81, TrivialBytesPerRow(640, depth), depth);
826	+	if (width >= 800 && height >= 600)
827	+	add_mode(800, 600, 0x82, TrivialBytesPerRow(800, depth), depth);
828	+	if (width >= 1024 && height >= 768)
829	+	add_mode(1024, 768, 0x83, TrivialBytesPerRow(1024, depth), depth);
830	+	if (width >= 1152 && height >= 870)
831	+	add_mode(1152, 870, 0x84, TrivialBytesPerRow(1152, depth), depth);
832	+	if (width >= 1280 && height >= 1024)
833	+	add_mode(1280, 1024, 0x85, TrivialBytesPerRow(1280, depth), depth);
834	+	if (width >= 1600 && height >= 1200)
835	+	add_mode(1600, 1200, 0x86, TrivialBytesPerRow(1600, depth), depth);
836	+	}
837	+
838	+
839	+	static ULONG find_mode_for_depth(uint32 width, uint32 height, uint32 depth)
840	+	{
841	+	ULONG ID = BestModeID(BIDTAG_NominalWidth, width,
842	+	BIDTAG_NominalHeight, height,
843	+	BIDTAG_Depth, depth,
844	+	BIDTAG_DIPFMustNotHave, DIPF_IS_ECS | DIPF_IS_HAM | DIPF_IS_AA,
845	+	TAG_END);
846	+
847	+	return ID;
848	+	}
849	+
850	+
851	+	static ULONG bits_from_depth(video_depth depth)
852	+	{
853	+	int bits = 1 << depth;
854	+	if (bits == 16)
855	+	bits = 15;
856	+	else if (bits == 32)
857	+	bits = 24;
858	+
859	+	return bits;
860	+	}
861	+
862	+
863	+	static bool is_valid_modeid(int display_type, ULONG mode_id)
864	+	{
865	+	if (INVALID_ID == mode_id)
866	+	return false;
867	+
868	+	switch (display_type) {
869	+	case DISPLAY_SCREEN_P96:
870	+	return check_modeid_p96(mode_id);
871	+	break;
872	+	case DISPLAY_SCREEN_CGFX:
873	+	return check_modeid_cgfx(mode_id);
874	+	break;
875	+	default:
876	+	return false;
877	+	break;
878	+	}
879	+	}
880	+
881	+
882	+	static bool check_modeid_p96(ULONG mode_id)
883	+	{
884	+	// Check if the mode is one we can handle
885	+	uint32 depth = p96GetModeIDAttr(mode_id, P96IDA_DEPTH);
886	+	uint32 format = p96GetModeIDAttr(mode_id, P96IDA_RGBFORMAT);
887	+
888	+	D(bug("check_modeid_p96: mode_id=%08lx  depth=%ld  format=%ld\n", mode_id, depth, format));
889	+
890	+	if (!p96GetModeIDAttr(screen_mode_id, P96IDA_ISP96))
891	+	return false;
892	+
893	+	switch (depth) {
894	+	case 8:
895	+	break;
896	+	case 15:
897	+	case 16:
898	+	if (format != RGBFB_R5G5B5)
899	+	return false;
900	+	break;
901	+	case 24:
902	+	case 32:
903	+	if (format != RGBFB_A8R8G8B8)
904	+	return false;
905	+	break;
906	+	default:
907	+	return false;
908	+	}
909	+
910	+	return true;
911	+	}
912	+
913	+
914	+	static bool check_modeid_cgfx(ULONG mode_id)
915	+	{
916	+	uint32 depth = GetCyberIDAttr(CYBRIDATTR_DEPTH, mode_id);
917	+	uint32 format = GetCyberIDAttr(CYBRIDATTR_PIXFMT, mode_id);
918	+
919	+	D(bug("check_modeid_cgfx: mode_id=%08lx  depth=%ld  format=%ld\n", mode_id, depth, format));
920	+
921	+	if (!IsCyberModeID(mode_id))
922	+	return false;
923	+
924	+	switch (depth) {
925	+	case 8:
926	+	break;
927	+	case 15:
928	+	case 16:
929	+	if (format != PIXFMT_RGB15)
930	+	return false;
931	+	break;
932	+	case 24:
933	+	case 32:
934	+	if (format != PIXFMT_ARGB32)
935	+	return false;
936	+	break;
937	+	default:
938	+	return false;
939	+	}
940	+
941	+	return true;
942	+	}

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