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

Comparing BasiliskII/src/AmigaOS/video_amiga.cpp (file contents):
Revision 1.15 by cebix, 2001-06-30T12:58:07Z vs.
Revision 1.22 by cebix, 2002-01-15T14:58:34Z

#	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
98	–	// Add resolution to list of supported modes and set VideoMonitor
99	–	static void set_video_monitor(uint32 width, uint32 height, uint32 bytes_per_row, int depth)
100	–	{
101	–	video_mode mode;
102	–
103	–	mode.x = width;
104	–	mode.y = height;
105	–	mode.resolution_id = 0x80;
106	–	mode.bytes_per_row = bytes_per_row;
107	–
108	–	switch (depth) {
109	–	case 1:
110	–	mode.depth = VDEPTH_1BIT;
111	–	break;
112	–	case 2:
113	–	mode.depth = VDEPTH_2BIT;
114	–	break;
115	–	case 4:
116	–	mode.depth = VDEPTH_4BIT;
117	–	break;
118	–	case 8:
119	–	mode.depth = VDEPTH_8BIT;
120	–	break;
121	–	case 15:
122	–	case 16:
123	–	mode.depth = VDEPTH_16BIT;
124	–	break;
125	–	case 24:
126	–	case 32:
127	–	mode.depth = VDEPTH_32BIT;
128	–	break;
129	–	}
130	–
131	–	VideoModes.push_back(mode);
132	–	VideoMonitor.mode = mode;
133	–	}
109
110		// Open window
111		static bool init_window(int width, int height)
#	Line 154 | 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		// Add resolution and set VideoMonitor
169	–	set_video_monitor(width, height, the_bitmap->BytesPerRow, 1);
144		VideoMonitor.mac_frame_base = (uint32)the_bitmap->Planes[0];
145
146		// Set FgPen and BgPen
#	Line 206 | 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
#	Line 215 | Line 189 | static bool init_pip(int width, int heig
189
190		// Add resolution and set VideoMonitor
191		VideoMonitor.mac_frame_base = p96GetBitMapAttr(the_bitmap, P96BMA_MEMORY);
192	<	set_video_monitor(width, height, p96GetBitMapAttr(the_bitmap, P96BMA_BYTESPERROW), 16);
192	>
193		return true;
194		}
195
#	Line 226 | 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:
234	<	break;
235	<	case 15:
236	<	case 16:
237	<	if (format != RGBFB_R5G5B5) {
238	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
239	<	return false;
240	<	}
241	<	break;
242	<	case 24:
243	<	case 32:
244	<	if (format != RGBFB_A8R8G8B8) {
245	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
246	<	return false;
247	<	}
248	<	break;
249	<	default:
250	<	ErrorAlert(GetString(STR_WRONG_SCREEN_DEPTH_ERR));
251	<	return false;
252	<	}
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
#	Line 266 | 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 274 | 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 283 | 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
247		ScreenToFront(the_screen);
248
249		// Add resolution and set VideoMonitor
293	–	set_video_monitor(width, height, p96GetBitMapAttr(the_screen->RastPort.BitMap, P96BMA_BYTESPERROW), depth);
250		VideoMonitor.mac_frame_base = p96GetBitMapAttr(the_screen->RastPort.BitMap, P96BMA_MEMORY);
251	+
252		return true;
253		}
254
#	Line 302 | 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:
310	<	break;
311	<	case 15:
312	<	case 16:
313	<	// !!! PIXFMT_RGB15 is correct !!!
314	<	if (format != PIXFMT_RGB15) {
315	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
316	<	return false;
317	<	}
318	<	break;
319	<	case 24:
320	<	case 32:
321	<	if (format != PIXFMT_ARGB32) {
322	<	ErrorAlert(GetString(STR_WRONG_SCREEN_FORMAT_ERR));
323	<	return false;
324	<	}
325	<	break;
326	<	default:
327	<	ErrorAlert(GetString(STR_WRONG_SCREEN_DEPTH_ERR));
328	<	return false;
329	<	}
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
#	Line 341 | 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 349 | 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 358 | 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
#	Line 373 | Line 312 | static bool init_screen_cgfx(ULONG mode_
312		TAG_END
313		);
314		UnLockBitMap(handle);
315	<	set_video_monitor(width, height, GetCyberMapAttr(the_screen->RastPort.BitMap, CYBRMATTR_XMOD), depth);
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 401 | 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	+	// Construct list of supported modes
368	+	switch (display_type) {
369	+	case DISPLAY_WINDOW:
370	+	default_width = window_width;
371	+	default_height = window_height;
372	+	default_depth = 1;
373	+	add_modes(window_width, window_height, VDEPTH_1BIT);
374	+	break;
375	+
376	+	case DISPLAY_PIP:
377	+	default_depth = 16;
378	+	default_width = window_width;
379	+	default_height = window_height;
380	+	add_modes(window_width, window_height, VDEPTH_16BIT);
381	+	break;
382	+
383	+	case DISPLAY_SCREEN_P96:
384	+	case DISPLAY_SCREEN_CGFX:
385	+	struct DimensionInfo dimInfo;
386	+	DisplayInfoHandle handle = FindDisplayInfo(screen_mode_id);
387	+
388	+	if (NULL == handle)
389	+	return false;
390	+
391	+	if (GetDisplayInfoData(handle, (UBYTE *) &dimInfo, sizeof(dimInfo), DTAG_DIMS, 0) <= 0)
392	+	return false;
393	+
394	+	default_width = 1 + dimInfo.Nominal.MaxX - dimInfo.Nominal.MinX;
395	+	default_height = 1 + dimInfo.Nominal.MaxY - dimInfo.Nominal.MinY;
396	+	default_depth = dimInfo.MaxDepth;
397	+
398	+	for (unsigned d=VDEPTH_8BIT; d<=VDEPTH_32BIT; d++)
399	+	{
400	+	ULONG mode_id = find_mode_for_depth(default_width, default_height, bits_from_depth(video_depth(d)));
401	+
402	+	if (is_valid_modeid(display_type, mode_id))
403	+	{
404	+	add_modes(default_width, default_height, video_depth(d));
405	+	}
406	+	}
407	+	break;
408	+	}
409	+
410	+	video_init_depth_list();
411	+
412	+	#if DEBUG
413	+	bug("Available video modes:\n");
414	+	vector<video_mode>::const_iterator i = VideoModes.begin(), end = VideoModes.end();
415	+	while (i != end) {
416	+	bug(" %dx%d (ID %02x), %d colors\n", i->x, i->y, i->resolution_id, 1 << bits_from_depth(i->depth));
417	+	++i;
418	+	}
419	+	#endif
420	+
421	+	D(bug("VideoInit: def_width=%ld  def_height=%ld  def_depth=%ld\n", default_width, default_height, default_depth));
422	+
423	+	// Find requested default mode and open display
424	+	if (VideoModes.size() == 1)
425	+	return video_open(VideoModes[0]);
426	+	else {
427	+	// Find mode with specified dimensions
428	+	std::vector<video_mode>::const_iterator i, end = VideoModes.end();
429	+	for (i = VideoModes.begin(); i != end; ++i)
430	+	{
431	+	D(bug("VideoInit: w=%ld  h=%ld  d=%ld\n", i->x, i->y, bits_from_depth(i->depth)));
432	+	if (i->x == default_width && i->y == default_height && bits_from_depth(i->depth) == default_depth)
433	+	return video_open(*i);
434	+	}
435	+	return video_open(VideoModes[0]);
436	+	}
437	+
438	+	return true;
439	+	}
440	+
441	+
442	+	static bool video_open(const video_mode &mode)
443	+	{
444	+	ULONG depth_bits = bits_from_depth(mode.depth);
445	+	ULONG ID = find_mode_for_depth(mode.x, mode.y, depth_bits);
446	+
447	+	D(bug("video_open: width=%ld  height=%ld  depth=%ld  ID=%08lx\n", mode.x, mode.y, depth_bits, ID));
448	+
449	+	if (INVALID_ID == ID)
450	+	{
451	+	ErrorAlert(STR_NO_VIDEO_MODE_ERR);
452	+	return false;
453	+	}
454	+
455	+	VideoMonitor.mode = mode;
456	+
457		// Open display
458		switch (display_type) {
459		case DISPLAY_WINDOW:
460	<	if (!init_window(width, height))
460	>	if (!init_window(mode.x, mode.y))
461		return false;
462		break;
463
464		case DISPLAY_PIP:
465	<	if (!init_pip(width, height))
465	>	if (!init_pip(mode.x, mode.y))
466		return false;
467		break;
468
469		case DISPLAY_SCREEN_P96:
470	<	if (!init_screen_p96(mode_id))
470	>	if (!init_screen_p96(ID))
471		return false;
472		break;
473
474		case DISPLAY_SCREEN_CGFX:
475	<	if (!init_screen_cgfx(mode_id))
475	>	if (!init_screen_cgfx(ID))
476		return false;
477		break;
478		}
#	Line 451 | Line 485 | bool VideoInit(bool classic)
485		TAG_END
486		);
487		if (periodic_proc == NULL) {
488	<	ErrorAlert(GetString(STR_NO_MEM_ERR));
488	>	ErrorAlert(STR_NO_MEM_ERR);
489		return false;
490		}
491	+
492		return true;
493		}
494
495
496	<	/*
462	<	*  Deinitialization
463	<	*/
464	<
465	<	void VideoExit(void)
496	>	static void video_close()
497		{
498		// Stop periodic process
499		if (periodic_proc) {
#	Line 487 | Line 518 | void VideoExit(void)
518		ReleasePen(the_win->WScreen->ViewPort.ColorMap, white_pen);
519
520		CloseWindow(the_win);
521	+	the_win = NULL;
522		}
523		break;
524
#	Line 501 | Line 533 | void VideoExit(void)
533
534		// Close window
535		if (the_win)
536	+	{
537		CloseWindow(the_win);
538	+	the_win = NULL;
539	+	}
540
541		// Close screen
542		if (the_screen) {
#	Line 514 | Line 549 | void VideoExit(void)
549
550		// Close window
551		if (the_win)
552	+	{
553		CloseWindow(the_win);
554	+	the_win = NULL;
555	+	}
556
557		// Close screen
558		if (the_screen) {
#	Line 533 | Line 571 | void VideoExit(void)
571
572
573		/*
574	+	*  Deinitialization
575	+	*/
576	+
577	+	void VideoExit(void)
578	+	{
579	+	video_close();
580	+	}
581	+
582	+
583	+	/*
584		*  Set palette
585		*/
586
587	<	void video_set_palette(uint8 *pal)
587	>	void video_set_palette(uint8 *pal, int num)
588		{
589		if ((display_type == DISPLAY_SCREEN_P96 || display_type == DISPLAY_SCREEN_CGFX)
590		&& !IsDirectMode(VideoMonitor.mode)) {
591
592		// Convert palette to 32 bits
593		ULONG table[2 + 256 * 3];
594	<	table[0] = 256 << 16;
595	<	table[256 * 3 + 1] = 0;
596	<	for (int i=0; i<256; i++) {
594	>	table[0] = num << 16;
595	>	table[num * 3 + 1] = 0;
596	>	for (int i=0; i<num; i++) {
597		table[i*3+1] = pal[i*3] * 0x01010101;
598		table[i*3+2] = pal[i*3+1] * 0x01010101;
599		table[i*3+3] = pal[i*3+2] * 0x01010101;
#	Line 563 | Line 611 | void video_set_palette(uint8 *pal)
611
612		void video_switch_to_mode(const video_mode &mode)
613		{
614	+	// Close and reopen display
615	+	video_close();
616	+	if (!video_open(mode))
617	+	{
618	+	ErrorAlert(STR_OPEN_WINDOW_ERR);
619	+	QuitEmulator();
620	+	}
621	+	}
622	+
623	+
624	+	/*
625	+	*  Close down full-screen mode (if bringing up error alerts is unsafe while in full-screen mode)
626	+	*/
627	+
628	+	void VideoQuitFullScreen(void)
629	+	{
630		}
631
632
#	Line 737 | Line 801 | static __saveds void periodic_func(void)
801		Forbid();
802		Signal(MainTask, SIGF_SINGLE);
803		}
804	+
805	+
806	+	// Add mode to list of supported modes
807	+	static void add_mode(uint32 width, uint32 height, uint32 resolution_id, uint32 bytes_per_row, video_depth depth)
808	+	{
809	+	video_mode mode;
810	+	mode.x = width;
811	+	mode.y = height;
812	+	mode.resolution_id = resolution_id;
813	+	mode.bytes_per_row = bytes_per_row;
814	+	mode.depth = depth;
815	+
816	+	D(bug("Added video mode: w=%ld  h=%ld  d=%ld\n", width, height, depth));
817	+
818	+	VideoModes.push_back(mode);
819	+	}
820	+
821	+	// Add standard list of windowed modes for given color depth
822	+	static void add_modes(uint32 width, uint32 height, video_depth depth)
823	+	{
824	+	D(bug("add_modes: w=%ld  h=%ld  d=%ld\n", width, height, depth));
825	+
826	+	if (width >= 512 && height >= 384)
827	+	add_mode(512, 384, 0x80, TrivialBytesPerRow(512, depth), depth);
828	+	if (width >= 640 && height >= 480)
829	+	add_mode(640, 480, 0x81, TrivialBytesPerRow(640, depth), depth);
830	+	if (width >= 800 && height >= 600)
831	+	add_mode(800, 600, 0x82, TrivialBytesPerRow(800, depth), depth);
832	+	if (width >= 1024 && height >= 768)
833	+	add_mode(1024, 768, 0x83, TrivialBytesPerRow(1024, depth), depth);
834	+	if (width >= 1152 && height >= 870)
835	+	add_mode(1152, 870, 0x84, TrivialBytesPerRow(1152, depth), depth);
836	+	if (width >= 1280 && height >= 1024)
837	+	add_mode(1280, 1024, 0x85, TrivialBytesPerRow(1280, depth), depth);
838	+	if (width >= 1600 && height >= 1200)
839	+	add_mode(1600, 1200, 0x86, TrivialBytesPerRow(1600, depth), depth);
840	+	}
841	+
842	+
843	+	static ULONG find_mode_for_depth(uint32 width, uint32 height, uint32 depth)
844	+	{
845	+	ULONG ID = BestModeID(BIDTAG_NominalWidth, width,
846	+	BIDTAG_NominalHeight, height,
847	+	BIDTAG_Depth, depth,
848	+	BIDTAG_DIPFMustNotHave, DIPF_IS_ECS | DIPF_IS_HAM | DIPF_IS_AA,
849	+	TAG_END);
850	+
851	+	return ID;
852	+	}
853	+
854	+
855	+	static ULONG bits_from_depth(video_depth depth)
856	+	{
857	+	int bits = 1 << depth;
858	+	if (bits == 16)
859	+	bits = 15;
860	+	else if (bits == 32)
861	+	bits = 24;
862	+
863	+	return bits;
864	+	}
865	+
866	+
867	+	static bool is_valid_modeid(int display_type, ULONG mode_id)
868	+	{
869	+	if (INVALID_ID == mode_id)
870	+	return false;
871	+
872	+	switch (display_type)
873	+	{
874	+	case DISPLAY_SCREEN_P96:
875	+	return check_modeid_p96(mode_id);
876	+	break;
877	+	case DISPLAY_SCREEN_CGFX:
878	+	return check_modeid_cgfx(mode_id);
879	+	break;
880	+	default:
881	+	return false;
882	+	break;
883	+	}
884	+	}
885	+
886	+
887	+	static bool check_modeid_p96(ULONG mode_id)
888	+	{
889	+	// Check if the mode is one we can handle
890	+	uint32 depth = p96GetModeIDAttr(mode_id, P96IDA_DEPTH);
891	+	uint32 format = p96GetModeIDAttr(mode_id, P96IDA_RGBFORMAT);
892	+
893	+	if (!p96GetModeIDAttr(screen_mode_id, P96IDA_ISP96))
894	+	return false;
895	+
896	+	switch (depth) {
897	+	case 8:
898	+	break;
899	+	case 15:
900	+	case 16:
901	+	if (format != RGBFB_R5G5B5)
902	+	return false;
903	+	break;
904	+	case 24:
905	+	case 32:
906	+	if (format != RGBFB_A8R8G8B8)
907	+	return false;
908	+	break;
909	+	default:
910	+	return false;
911	+	}
912	+
913	+	return true;
914	+	}
915	+
916	+
917	+	static bool check_modeid_cgfx(ULONG mode_id)
918	+	{
919	+	uint32 depth = GetCyberIDAttr(CYBRIDATTR_DEPTH, mode_id);
920	+	uint32 format = GetCyberIDAttr(CYBRIDATTR_PIXFMT, mode_id);
921	+
922	+	D(bug("init_screen_cgfx: mode_id=%08lx  depth=%ld  format=%ld\n", mode_id, depth, format));
923	+
924	+	if (!IsCyberModeID(mode_id))
925	+	return false;
926	+
927	+	switch (depth) {
928	+	case 8:
929	+	break;
930	+	case 15:
931	+	case 16:
932	+	// !!! PIXFMT_RGB15 is correct !!!
933	+	if (format != PIXFMT_RGB15)
934	+	return false;
935	+	break;
936	+	case 24:
937	+	case 32:
938	+	if (format != PIXFMT_ARGB32)
939	+	return false;
940	+	break;
941	+	default:
942	+	return false;
943	+	}
944	+
945	+	return true;
946	+	}
947	+

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