bitmap.c@ 20525

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1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3	Bitmap decompression routines
4	Copyright (C) Matthew Chapman 1999-2007
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
8	the Free Software Foundation; either version 2 of the License, or
9	(at your option) any later version.
10
11	This program is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.
15
16	You should have received a copy of the GNU General Public License
17	along with this program; if not, write to the Free Software
18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19	*/
20
21	/*
22	* Sun GPL Disclaimer: For the avoidance of doubt, except that if any license choice
23	* other than GPL or LGPL is available it will apply instead, Sun elects to use only
24	* the General Public License version 2 (GPLv2) at this time for any software where
25	* a choice of GPL license versions is made available with the language indicating
26	* that GPLv2 or any later version may be used, or where a choice of which version
27	* of the GPL is applied is otherwise unspecified.
28	*/
29
30	/* three seperate function for speed when decompressing the bitmaps
31	when modifing one function make the change in the others
32	[email protected] */
33
34	/* indent is confused by this file */
35	/* INDENT-OFF */
36
37	#include "rdesktop.h"
38
39	#define CVAL(p) (*(p++))
40	#ifdef NEED_ALIGN
41	#ifdef L_ENDIAN
42	#define CVAL2(p, v) { v = ((p++)); v \|= ((p++)) << 8; }
43	#else
44	#define CVAL2(p, v) { v = ((p++)) << 8; v \|= ((p++)); }
45	#endif /* L_ENDIAN */
46	#else
47	#define CVAL2(p, v) { v = (((uint16)p)); p += 2; }
48	#endif /* NEED_ALIGN */
49
50	#define UNROLL8(exp) { exp exp exp exp exp exp exp exp }
51
52	#define REPEAT(statement) \
53	{ \
54	while((count & ~0x7) && ((x+8) < width)) \
55	UNROLL8( statement; count--; x++; ); \
56	\
57	while((count > 0) && (x < width)) \
58	{ \
59	statement; \
60	count--; \
61	x++; \
62	} \
63	}
64
65	#define MASK_UPDATE() \
66	{ \
67	mixmask <<= 1; \
68	if (mixmask == 0) \
69	{ \
70	mask = fom_mask ? fom_mask : CVAL(input); \
71	mixmask = 1; \
72	} \
73	}
74
75	/* 1 byte bitmap decompress */
76	static RD_BOOL
77	bitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size)
78	{
79	uint8 *end = input + size;
80	uint8 prevline = NULL, line = NULL;
81	int opcode, count, offset, isfillormix, x = width;
82	int lastopcode = -1, insertmix = False, bicolour = False;
83	uint8 code;
84	uint8 colour1 = 0, colour2 = 0;
85	uint8 mixmask, mask = 0;
86	uint8 mix = 0xff;
87	int fom_mask = 0;
88
89	while (input < end)
90	{
91	fom_mask = 0;
92	code = CVAL(input);
93	opcode = code >> 4;
94	/* Handle different opcode forms */
95	switch (opcode)
96	{
97	case 0xc:
98	case 0xd:
99	case 0xe:
100	opcode -= 6;
101	count = code & 0xf;
102	offset = 16;
103	break;
104	case 0xf:
105	opcode = code & 0xf;
106	if (opcode < 9)
107	{
108	count = CVAL(input);
109	count \|= CVAL(input) << 8;
110	}
111	else
112	{
113	count = (opcode < 0xb) ? 8 : 1;
114	}
115	offset = 0;
116	break;
117	default:
118	opcode >>= 1;
119	count = code & 0x1f;
120	offset = 32;
121	break;
122	}
123	/* Handle strange cases for counts */
124	if (offset != 0)
125	{
126	isfillormix = ((opcode == 2) \|\| (opcode == 7));
127	if (count == 0)
128	{
129	if (isfillormix)
130	count = CVAL(input) + 1;
131	else
132	count = CVAL(input) + offset;
133	}
134	else if (isfillormix)
135	{
136	count <<= 3;
137	}
138	}
139	/* Read preliminary data */
140	switch (opcode)
141	{
142	case 0: /* Fill */
143	if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
144	insertmix = True;
145	break;
146	case 8: /* Bicolour */
147	colour1 = CVAL(input);
148	case 3: /* Colour */
149	colour2 = CVAL(input);
150	break;
151	case 6: /* SetMix/Mix */
152	case 7: /* SetMix/FillOrMix */
153	mix = CVAL(input);
154	opcode -= 5;
155	break;
156	case 9: /* FillOrMix_1 */
157	mask = 0x03;
158	opcode = 0x02;
159	fom_mask = 3;
160	break;
161	case 0x0a: /* FillOrMix_2 */
162	mask = 0x05;
163	opcode = 0x02;
164	fom_mask = 5;
165	break;
166	}
167	lastopcode = opcode;
168	mixmask = 0;
169	/* Output body */
170	while (count > 0)
171	{
172	if (x >= width)
173	{
174	if (height <= 0)
175	return False;
176	x = 0;
177	height--;
178	prevline = line;
179	line = output + height * width;
180	}
181	switch (opcode)
182	{
183	case 0: /* Fill */
184	if (insertmix)
185	{
186	if (prevline == NULL)
187	line[x] = mix;
188	else
189	line[x] = prevline[x] ^ mix;
190	insertmix = False;
191	count--;
192	x++;
193	}
194	if (prevline == NULL)
195	{
196	REPEAT(line[x] = 0)
197	}
198	else
199	{
200	REPEAT(line[x] = prevline[x])
201	}
202	break;
203	case 1: /* Mix */
204	if (prevline == NULL)
205	{
206	REPEAT(line[x] = mix)
207	}
208	else
209	{
210	REPEAT(line[x] = prevline[x] ^ mix)
211	}
212	break;
213	case 2: /* Fill or Mix */
214	if (prevline == NULL)
215	{
216	REPEAT
217	(
218	MASK_UPDATE();
219	if (mask & mixmask)
220	line[x] = mix;
221	else
222	line[x] = 0;
223	)
224	}
225	else
226	{
227	REPEAT
228	(
229	MASK_UPDATE();
230	if (mask & mixmask)
231	line[x] = prevline[x] ^ mix;
232	else
233	line[x] = prevline[x];
234	)
235	}
236	break;
237	case 3: /* Colour */
238	REPEAT(line[x] = colour2)
239	break;
240	case 4: /* Copy */
241	REPEAT(line[x] = CVAL(input))
242	break;
243	case 8: /* Bicolour */
244	REPEAT
245	(
246	if (bicolour)
247	{
248	line[x] = colour2;
249	bicolour = False;
250	}
251	else
252	{
253	line[x] = colour1;
254	bicolour = True; count++;
255	}
256	)
257	break;
258	case 0xd: /* White */
259	REPEAT(line[x] = 0xff)
260	break;
261	case 0xe: /* Black */
262	REPEAT(line[x] = 0)
263	break;
264	default:
265	unimpl("bitmap opcode 0x%x\n", opcode);
266	return False;
267	}
268	}
269	}
270	return True;
271	}
272
273	/* 2 byte bitmap decompress */
274	static RD_BOOL
275	bitmap_decompress2(uint8 * output, int width, int height, uint8 * input, int size)
276	{
277	uint8 *end = input + size;
278	uint16 prevline = NULL, line = NULL;
279	int opcode, count, offset, isfillormix, x = width;
280	int lastopcode = -1, insertmix = False, bicolour = False;
281	uint8 code;
282	uint16 colour1 = 0, colour2 = 0;
283	uint8 mixmask, mask = 0;
284	uint16 mix = 0xffff;
285	int fom_mask = 0;
286
287	while (input < end)
288	{
289	fom_mask = 0;
290	code = CVAL(input);
291	opcode = code >> 4;
292	/* Handle different opcode forms */
293	switch (opcode)
294	{
295	case 0xc:
296	case 0xd:
297	case 0xe:
298	opcode -= 6;
299	count = code & 0xf;
300	offset = 16;
301	break;
302	case 0xf:
303	opcode = code & 0xf;
304	if (opcode < 9)
305	{
306	count = CVAL(input);
307	count \|= CVAL(input) << 8;
308	}
309	else
310	{
311	count = (opcode < 0xb) ? 8 : 1;
312	}
313	offset = 0;
314	break;
315	default:
316	opcode >>= 1;
317	count = code & 0x1f;
318	offset = 32;
319	break;
320	}
321	/* Handle strange cases for counts */
322	if (offset != 0)
323	{
324	isfillormix = ((opcode == 2) \|\| (opcode == 7));
325	if (count == 0)
326	{
327	if (isfillormix)
328	count = CVAL(input) + 1;
329	else
330	count = CVAL(input) + offset;
331	}
332	else if (isfillormix)
333	{
334	count <<= 3;
335	}
336	}
337	/* Read preliminary data */
338	switch (opcode)
339	{
340	case 0: /* Fill */
341	if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
342	insertmix = True;
343	break;
344	case 8: /* Bicolour */
345	CVAL2(input, colour1);
346	case 3: /* Colour */
347	CVAL2(input, colour2);
348	break;
349	case 6: /* SetMix/Mix */
350	case 7: /* SetMix/FillOrMix */
351	CVAL2(input, mix);
352	opcode -= 5;
353	break;
354	case 9: /* FillOrMix_1 */
355	mask = 0x03;
356	opcode = 0x02;
357	fom_mask = 3;
358	break;
359	case 0x0a: /* FillOrMix_2 */
360	mask = 0x05;
361	opcode = 0x02;
362	fom_mask = 5;
363	break;
364	}
365	lastopcode = opcode;
366	mixmask = 0;
367	/* Output body */
368	while (count > 0)
369	{
370	if (x >= width)
371	{
372	if (height <= 0)
373	return False;
374	x = 0;
375	height--;
376	prevline = line;
377	line = ((uint16 ) output) + height width;
378	}
379	switch (opcode)
380	{
381	case 0: /* Fill */
382	if (insertmix)
383	{
384	if (prevline == NULL)
385	line[x] = mix;
386	else
387	line[x] = prevline[x] ^ mix;
388	insertmix = False;
389	count--;
390	x++;
391	}
392	if (prevline == NULL)
393	{
394	REPEAT(line[x] = 0)
395	}
396	else
397	{
398	REPEAT(line[x] = prevline[x])
399	}
400	break;
401	case 1: /* Mix */
402	if (prevline == NULL)
403	{
404	REPEAT(line[x] = mix)
405	}
406	else
407	{
408	REPEAT(line[x] = prevline[x] ^ mix)
409	}
410	break;
411	case 2: /* Fill or Mix */
412	if (prevline == NULL)
413	{
414	REPEAT
415	(
416	MASK_UPDATE();
417	if (mask & mixmask)
418	line[x] = mix;
419	else
420	line[x] = 0;
421	)
422	}
423	else
424	{
425	REPEAT
426	(
427	MASK_UPDATE();
428	if (mask & mixmask)
429	line[x] = prevline[x] ^ mix;
430	else
431	line[x] = prevline[x];
432	)
433	}
434	break;
435	case 3: /* Colour */
436	REPEAT(line[x] = colour2)
437	break;
438	case 4: /* Copy */
439	REPEAT(CVAL2(input, line[x]))
440	break;
441	case 8: /* Bicolour */
442	REPEAT
443	(
444	if (bicolour)
445	{
446	line[x] = colour2;
447	bicolour = False;
448	}
449	else
450	{
451	line[x] = colour1;
452	bicolour = True;
453	count++;
454	}
455	)
456	break;
457	case 0xd: /* White */
458	REPEAT(line[x] = 0xffff)
459	break;
460	case 0xe: /* Black */
461	REPEAT(line[x] = 0)
462	break;
463	default:
464	unimpl("bitmap opcode 0x%x\n", opcode);
465	return False;
466	}
467	}
468	}
469	return True;
470	}
471
472	/* 3 byte bitmap decompress */
473	static RD_BOOL
474	bitmap_decompress3(uint8 * output, int width, int height, uint8 * input, int size)
475	{
476	uint8 *end = input + size;
477	uint8 prevline = NULL, line = NULL;
478	int opcode, count, offset, isfillormix, x = width;
479	int lastopcode = -1, insertmix = False, bicolour = False;
480	uint8 code;
481	uint8 colour1[3] = {0, 0, 0}, colour2[3] = {0, 0, 0};
482	uint8 mixmask, mask = 0;
483	uint8 mix[3] = {0xff, 0xff, 0xff};
484	int fom_mask = 0;
485
486	while (input < end)
487	{
488	fom_mask = 0;
489	code = CVAL(input);
490	opcode = code >> 4;
491	/* Handle different opcode forms */
492	switch (opcode)
493	{
494	case 0xc:
495	case 0xd:
496	case 0xe:
497	opcode -= 6;
498	count = code & 0xf;
499	offset = 16;
500	break;
501	case 0xf:
502	opcode = code & 0xf;
503	if (opcode < 9)
504	{
505	count = CVAL(input);
506	count \|= CVAL(input) << 8;
507	}
508	else
509	{
510	count = (opcode <
511	0xb) ? 8 : 1;
512	}
513	offset = 0;
514	break;
515	default:
516	opcode >>= 1;
517	count = code & 0x1f;
518	offset = 32;
519	break;
520	}
521	/* Handle strange cases for counts */
522	if (offset != 0)
523	{
524	isfillormix = ((opcode == 2) \|\| (opcode == 7));
525	if (count == 0)
526	{
527	if (isfillormix)
528	count = CVAL(input) + 1;
529	else
530	count = CVAL(input) + offset;
531	}
532	else if (isfillormix)
533	{
534	count <<= 3;
535	}
536	}
537	/* Read preliminary data */
538	switch (opcode)
539	{
540	case 0: /* Fill */
541	if ((lastopcode == opcode) && !((x == width) && (prevline == NULL)))
542	insertmix = True;
543	break;
544	case 8: /* Bicolour */
545	colour1[0] = CVAL(input);
546	colour1[1] = CVAL(input);
547	colour1[2] = CVAL(input);
548	case 3: /* Colour */
549	colour2[0] = CVAL(input);
550	colour2[1] = CVAL(input);
551	colour2[2] = CVAL(input);
552	break;
553	case 6: /* SetMix/Mix */
554	case 7: /* SetMix/FillOrMix */
555	mix[0] = CVAL(input);
556	mix[1] = CVAL(input);
557	mix[2] = CVAL(input);
558	opcode -= 5;
559	break;
560	case 9: /* FillOrMix_1 */
561	mask = 0x03;
562	opcode = 0x02;
563	fom_mask = 3;
564	break;
565	case 0x0a: /* FillOrMix_2 */
566	mask = 0x05;
567	opcode = 0x02;
568	fom_mask = 5;
569	break;
570	}
571	lastopcode = opcode;
572	mixmask = 0;
573	/* Output body */
574	while (count > 0)
575	{
576	if (x >= width)
577	{
578	if (height <= 0)
579	return False;
580	x = 0;
581	height--;
582	prevline = line;
583	line = output + height * (width * 3);
584	}
585	switch (opcode)
586	{
587	case 0: /* Fill */
588	if (insertmix)
589	{
590	if (prevline == NULL)
591	{
592	line[x * 3] = mix[0];
593	line[x * 3 + 1] = mix[1];
594	line[x * 3 + 2] = mix[2];
595	}
596	else
597	{
598	line[x * 3] =
599	prevline[x * 3] ^ mix[0];
600	line[x * 3 + 1] =
601	prevline[x * 3 + 1] ^ mix[1];
602	line[x * 3 + 2] =
603	prevline[x * 3 + 2] ^ mix[2];
604	}
605	insertmix = False;
606	count--;
607	x++;
608	}
609	if (prevline == NULL)
610	{
611	REPEAT
612	(
613	line[x * 3] = 0;
614	line[x * 3 + 1] = 0;
615	line[x * 3 + 2] = 0;
616	)
617	}
618	else
619	{
620	REPEAT
621	(
622	line[x * 3] = prevline[x * 3];
623	line[x * 3 + 1] = prevline[x * 3 + 1];
624	line[x * 3 + 2] = prevline[x * 3 + 2];
625	)
626	}
627	break;
628	case 1: /* Mix */
629	if (prevline == NULL)
630	{
631	REPEAT
632	(
633	line[x * 3] = mix[0];
634	line[x * 3 + 1] = mix[1];
635	line[x * 3 + 2] = mix[2];
636	)
637	}
638	else
639	{
640	REPEAT
641	(
642	line[x * 3] =
643	prevline[x * 3] ^ mix[0];
644	line[x * 3 + 1] =
645	prevline[x * 3 + 1] ^ mix[1];
646	line[x * 3 + 2] =
647	prevline[x * 3 + 2] ^ mix[2];
648	)
649	}
650	break;
651	case 2: /* Fill or Mix */
652	if (prevline == NULL)
653	{
654	REPEAT
655	(
656	MASK_UPDATE();
657	if (mask & mixmask)
658	{
659	line[x * 3] = mix[0];
660	line[x * 3 + 1] = mix[1];
661	line[x * 3 + 2] = mix[2];
662	}
663	else
664	{
665	line[x * 3] = 0;
666	line[x * 3 + 1] = 0;
667	line[x * 3 + 2] = 0;
668	}
669	)
670	}
671	else
672	{
673	REPEAT
674	(
675	MASK_UPDATE();
676	if (mask & mixmask)
677	{
678	line[x * 3] =
679	prevline[x * 3] ^ mix [0];
680	line[x * 3 + 1] =
681	prevline[x * 3 + 1] ^ mix [1];
682	line[x * 3 + 2] =
683	prevline[x * 3 + 2] ^ mix [2];
684	}
685	else
686	{
687	line[x * 3] =
688	prevline[x * 3];
689	line[x * 3 + 1] =
690	prevline[x * 3 + 1];
691	line[x * 3 + 2] =
692	prevline[x * 3 + 2];
693	}
694	)
695	}
696	break;
697	case 3: /* Colour */
698	REPEAT
699	(
700	line[x * 3] = colour2 [0];
701	line[x * 3 + 1] = colour2 [1];
702	line[x * 3 + 2] = colour2 [2];
703	)
704	break;
705	case 4: /* Copy */
706	REPEAT
707	(
708	line[x * 3] = CVAL(input);
709	line[x * 3 + 1] = CVAL(input);
710	line[x * 3 + 2] = CVAL(input);
711	)
712	break;
713	case 8: /* Bicolour */
714	REPEAT
715	(
716	if (bicolour)
717	{
718	line[x * 3] = colour2[0];
719	line[x * 3 + 1] = colour2[1];
720	line[x * 3 + 2] = colour2[2];
721	bicolour = False;
722	}
723	else
724	{
725	line[x * 3] = colour1[0];
726	line[x * 3 + 1] = colour1[1];
727	line[x * 3 + 2] = colour1[2];
728	bicolour = True;
729	count++;
730	}
731	)
732	break;
733	case 0xd: /* White */
734	REPEAT
735	(
736	line[x * 3] = 0xff;
737	line[x * 3 + 1] = 0xff;
738	line[x * 3 + 2] = 0xff;
739	)
740	break;
741	case 0xe: /* Black */
742	REPEAT
743	(
744	line[x * 3] = 0;
745	line[x * 3 + 1] = 0;
746	line[x * 3 + 2] = 0;
747	)
748	break;
749	default:
750	unimpl("bitmap opcode 0x%x\n", opcode);
751	return False;
752	}
753	}
754	}
755	return True;
756	}
757
758	/* decompress a colour plane */
759	static int
760	process_plane(uint8 * in, int width, int height, uint8 * out, int size)
761	{
762	int indexw;
763	int indexh;
764	int code;
765	int collen;
766	int replen;
767	int color;
768	int x;
769	int revcode;
770	uint8 * last_line;
771	uint8 * this_line;
772	uint8 * org_in;
773	uint8 * org_out;
774
775	org_in = in;
776	org_out = out;
777	last_line = 0;
778	indexh = 0;
779	while (indexh < height)
780	{
781	out = (org_out + width * height * 4) - ((indexh + 1) * width * 4);
782	color = 0;
783	this_line = out;
784	indexw = 0;
785	if (last_line == 0)
786	{
787	while (indexw < width)
788	{
789	code = CVAL(in);
790	replen = code & 0xf;
791	collen = (code >> 4) & 0xf;
792	revcode = (replen << 4) \| collen;
793	if ((revcode <= 47) && (revcode >= 16))
794	{
795	replen = revcode;
796	collen = 0;
797	}
798	while (collen > 0)
799	{
800	color = CVAL(in);
801	*out = color;
802	out += 4;
803	indexw++;
804	collen--;
805	}
806	while (replen > 0)
807	{
808	*out = color;
809	out += 4;
810	indexw++;
811	replen--;
812	}
813	}
814	}
815	else
816	{
817	while (indexw < width)
818	{
819	code = CVAL(in);
820	replen = code & 0xf;
821	collen = (code >> 4) & 0xf;
822	revcode = (replen << 4) \| collen;
823	if ((revcode <= 47) && (revcode >= 16))
824	{
825	replen = revcode;
826	collen = 0;
827	}
828	while (collen > 0)
829	{
830	x = CVAL(in);
831	if (x & 1)
832	{
833	x = x >> 1;
834	x = x + 1;
835	color = -x;
836	}
837	else
838	{
839	x = x >> 1;
840	color = x;
841	}
842	x = last_line[indexw * 4] + color;
843	*out = x;
844	out += 4;
845	indexw++;
846	collen--;
847	}
848	while (replen > 0)
849	{
850	x = last_line[indexw * 4] + color;
851	*out = x;
852	out += 4;
853	indexw++;
854	replen--;
855	}
856	}
857	}
858	indexh++;
859	last_line = this_line;
860	}
861	return (int) (in - org_in);
862	}
863
864	/* 4 byte bitmap decompress */
865	static RD_BOOL
866	bitmap_decompress4(uint8 * output, int width, int height, uint8 * input, int size)
867	{
868	int code;
869	int bytes_pro;
870	int total_pro;
871
872	code = CVAL(input);
873	if (code != 0x10)
874	{
875	return False;
876	}
877	total_pro = 1;
878	bytes_pro = process_plane(input, width, height, output + 3, size - total_pro);
879	total_pro += bytes_pro;
880	input += bytes_pro;
881	bytes_pro = process_plane(input, width, height, output + 2, size - total_pro);
882	total_pro += bytes_pro;
883	input += bytes_pro;
884	bytes_pro = process_plane(input, width, height, output + 1, size - total_pro);
885	total_pro += bytes_pro;
886	input += bytes_pro;
887	bytes_pro = process_plane(input, width, height, output + 0, size - total_pro);
888	total_pro += bytes_pro;
889	return size == total_pro;
890	}
891
892	/* main decompress function */
893	RD_BOOL
894	bitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp)
895	{
896	RD_BOOL rv = False;
897
898	switch (Bpp)
899	{
900	case 1:
901	rv = bitmap_decompress1(output, width, height, input, size);
902	break;
903	case 2:
904	rv = bitmap_decompress2(output, width, height, input, size);
905	break;
906	case 3:
907	rv = bitmap_decompress3(output, width, height, input, size);
908	break;
909	case 4:
910	rv = bitmap_decompress4(output, width, height, input, size);
911	break;
912	default:
913	unimpl("Bpp %d\n", Bpp);
914	break;
915	}
916	return rv;
917	}
918
919	/* INDENT-ON */

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source: vbox/trunk/src/VBox/RDP/client/bitmap.c@ 20525

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