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source: ImageMagick/trunk/coders/otb.c @ 7547

Revision 7547, 13.6 KB checked in by cristy, 13 months ago (diff)

Line
1	/*
2	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3	% %
4	% %
5	% %
6	% OOO TTTTT BBBB %
7	% O O T B B %
8	% O O T BBBB %
9	% O O T B B %
10	% OOO T BBBB %
11	% %
12	% %
13	% Read/Write On-The-Air Image Format %
14	% %
15	% Software Design %
16	% John Cristy %
17	% January 2000 %
18	% %
19	% %
20	% Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization %
21	% dedicated to making software imaging solutions freely available. %
22	% %
23	% You may not use this file except in compliance with the License. You may %
24	% obtain a copy of the License at %
25	% %
26	% http://www.imagemagick.org/script/license.php %
27	% %
28	% Unless required by applicable law or agreed to in writing, software %
29	% distributed under the License is distributed on an "AS IS" BASIS, %
30	% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31	% See the License for the specific language governing permissions and %
32	% limitations under the License. %
33	% %
34	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35	%
36	%
37	*/
38	/*
39	Include declarations.
40	*/
41	#include "MagickCore/studio.h"
42	#include "MagickCore/blob.h"
43	#include "MagickCore/blob-private.h"
44	#include "MagickCore/cache.h"
45	#include "MagickCore/color-private.h"
46	#include "MagickCore/colormap.h"
47	#include "MagickCore/colorspace.h"
48	#include "MagickCore/colorspace-private.h"
49	#include "MagickCore/exception.h"
50	#include "MagickCore/exception-private.h"
51	#include "MagickCore/image.h"
52	#include "MagickCore/image-private.h"
53	#include "MagickCore/list.h"
54	#include "MagickCore/magick.h"
55	#include "MagickCore/memory_.h"
56	#include "MagickCore/monitor.h"
57	#include "MagickCore/monitor-private.h"
58	#include "MagickCore/pixel-accessor.h"
59	#include "MagickCore/quantum-private.h"
60	#include "MagickCore/static.h"
61	#include "MagickCore/string_.h"
62	#include "MagickCore/module.h"
63
64	/*
65	Forward declarations.
66	*/
67	static MagickBooleanType
68	WriteOTBImage(const ImageInfo ,Image ,ExceptionInfo *);
69
70	/*
71	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72	% %
73	% %
74	% %
75	% R e a d O T B I m a g e %
76	% %
77	% %
78	% %
79	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
80	%
81	% ReadOTBImage() reads a on-the-air (level 0) bitmap and returns it. It
82	% allocates the memory necessary for the new Image structure and returns a
83	% pointer to the new image.
84	%
85	% The format of the ReadOTBImage method is:
86	%
87	% Image ReadOTBImage(const ImageInfo image_info,ExceptionInfo *exception)
88	%
89	% A description of each parameter follows:
90	%
91	% o image_info: the image info.
92	%
93	% o exception: return any errors or warnings in this structure.
94	%
95	%
96	*/
97	static Image ReadOTBImage(const ImageInfo image_info,ExceptionInfo *exception)
98	{
99	#define GetBit(a,i) (((a) >> (i)) & 1L)
100
101	Image
102	*image;
103
104	int
105	byte;
106
107	MagickBooleanType
108	status;
109
110	register ssize_t
111	x;
112
113	register Quantum
114	*q;
115
116	ssize_t
117	y;
118
119	unsigned char
120	bit,
121	info,
122	depth;
123
124	/*
125	Open image file.
126	*/
127	assert(image_info != (const ImageInfo *) NULL);
128	assert(image_info->signature == MagickSignature);
129	if (image_info->debug != MagickFalse)
130	(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
131	image_info->filename);
132	assert(exception != (ExceptionInfo *) NULL);
133	assert(exception->signature == MagickSignature);
134	image=AcquireImage(image_info,exception);
135	status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
136	if (status == MagickFalse)
137	{
138	image=DestroyImageList(image);
139	return((Image *) NULL);
140	}
141	/*
142	Initialize image structure.
143	*/
144	info=(unsigned char) ReadBlobByte(image);
145	if (GetBit(info,4) == 0)
146	{
147	image->columns=(size_t) ReadBlobByte(image);
148	image->rows=(size_t) ReadBlobByte(image);
149	}
150	else
151	{
152	image->columns=(size_t) ReadBlobMSBShort(image);
153	image->rows=(size_t) ReadBlobMSBShort(image);
154	}
155	if ((image->columns == 0) \|\| (image->rows == 0))
156	ThrowReaderException(CorruptImageError,"ImproperImageHeader");
157	depth=(unsigned char) ReadBlobByte(image);
158	if (depth != 1)
159	ThrowReaderException(CoderError,"OnlyLevelZerofilesSupported");
160	if (AcquireImageColormap(image,2,exception) == MagickFalse)
161	ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
162	if (image_info->ping != MagickFalse)
163	{
164	(void) CloseBlob(image);
165	return(GetFirstImageInList(image));
166	}
167	/*
168	Convert bi-level image to pixel packets.
169	*/
170	for (y=0; y < (ssize_t) image->rows; y++)
171	{
172	q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
173	if (q == (Quantum *) NULL)
174	break;
175	bit=0;
176	byte=0;
177	for (x=0; x < (ssize_t) image->columns; x++)
178	{
179	if (bit == 0)
180	{
181	byte=ReadBlobByte(image);
182	if (byte == EOF)
183	ThrowReaderException(CorruptImageError,"CorruptImage");
184	}
185	SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 0x00 : 0x01,q);
186	bit++;
187	if (bit == 8)
188	bit=0;
189	q+=GetPixelChannels(image);
190	}
191	if (SyncAuthenticPixels(image,exception) == MagickFalse)
192	break;
193	if (image->previous == (Image *) NULL)
194	{
195	status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
196	image->rows);
197	if (status == MagickFalse)
198	break;
199	}
200	}
201	(void) SyncImage(image,exception);
202	if (EOFBlob(image) != MagickFalse)
203	ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
204	image->filename);
205	(void) CloseBlob(image);
206	return(GetFirstImageInList(image));
207	}
208
209	/*
210	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
211	% %
212	% %
213	% %
214	% R e g i s t e r O T B I m a g e %
215	% %
216	% %
217	% %
218	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
219	%
220	% RegisterOTBImage() adds attributes for the OTB image format to
221	% the list of supported formats. The attributes include the image format
222	% tag, a method to read and/or write the format, whether the format
223	% supports the saving of more than one frame to the same file or blob,
224	% whether the format supports native in-memory I/O, and a brief
225	% description of the format.
226	%
227	% The format of the RegisterOTBImage method is:
228	%
229	% size_t RegisterOTBImage(void)
230	%
231	*/
232	ModuleExport size_t RegisterOTBImage(void)
233	{
234	MagickInfo
235	*entry;
236
237	entry=SetMagickInfo("OTB");
238	entry->decoder=(DecodeImageHandler *) ReadOTBImage;
239	entry->encoder=(EncodeImageHandler *) WriteOTBImage;
240	entry->adjoin=MagickFalse;
241	entry->description=ConstantString("On-the-air bitmap");
242	entry->module=ConstantString("OTB");
243	(void) RegisterMagickInfo(entry);
244	return(MagickImageCoderSignature);
245	}
246
247	/*
248	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
249	% %
250	% %
251	% %
252	% U n r e g i s t e r O T B I m a g e %
253	% %
254	% %
255	% %
256	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
257	%
258	% UnregisterOTBImage() removes format registrations made by the
259	% OTB module from the list of supported formats.
260	%
261	% The format of the UnregisterOTBImage method is:
262	%
263	% UnregisterOTBImage(void)
264	%
265	*/
266	ModuleExport void UnregisterOTBImage(void)
267	{
268	(void) UnregisterMagickInfo("OTB");
269	}
270
271	/*
272	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
273	% %
274	% %
275	% %
276	% W r i t e O T B I m a g e %
277	% %
278	% %
279	% %
280	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
281	%
282	% WriteOTBImage() writes an image to a file in the On-the-air Bitmap
283	% (level 0) image format.
284	%
285	% The format of the WriteOTBImage method is:
286	%
287	% MagickBooleanType WriteOTBImage(const ImageInfo *image_info,
288	% Image image,ExceptionInfo exception)
289	%
290	% A description of each parameter follows.
291	%
292	% o image_info: the image info.
293	%
294	% o image: The image.
295	%
296	% o exception: return any errors or warnings in this structure.
297	%
298	*/
299	static MagickBooleanType WriteOTBImage(const ImageInfo image_info,Image image,
300	ExceptionInfo *exception)
301	{
302	#define SetBit(a,i,set) \
303	a=(unsigned char) ((set) ? (a) \| (1L << (i)) : (a) & ~(1L << (i)))
304
305	MagickBooleanType
306	status;
307
308	register const Quantum
309	*p;
310
311	register ssize_t
312	x;
313
314	ssize_t
315	y;
316
317	unsigned char
318	bit,
319	byte,
320	info;
321
322	/*
323	Open output image file.
324	*/
325	assert(image_info != (const ImageInfo *) NULL);
326	assert(image_info->signature == MagickSignature);
327	assert(image != (Image *) NULL);
328	assert(image->signature == MagickSignature);
329	if (image->debug != MagickFalse)
330	(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
331	assert(exception != (ExceptionInfo *) NULL);
332	assert(exception->signature == MagickSignature);
333	status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
334	if (status == MagickFalse)
335	return(status);
336	if (IssRGBColorspace(image->colorspace) == MagickFalse)
337	(void) TransformImageColorspace(image,sRGBColorspace,exception);
338	/*
339	Convert image to a bi-level image.
340	*/
341	(void) SetImageType(image,BilevelType,exception);
342	info=0;
343	if ((image->columns >= 256) \|\| (image->rows >= 256))
344	SetBit(info,4,1);
345	(void) WriteBlobByte(image,info);
346	if ((image->columns >= 256) \|\| (image->rows >= 256))
347	{
348	(void) WriteBlobMSBShort(image,(unsigned short) image->columns);
349	(void) WriteBlobMSBShort(image,(unsigned short) image->rows);
350	}
351	else
352	{
353	(void) WriteBlobByte(image,(unsigned char) image->columns);
354	(void) WriteBlobByte(image,(unsigned char) image->rows);
355	}
356	(void) WriteBlobByte(image,1); /* depth */
357	for (y=0; y < (ssize_t) image->rows; y++)
358	{
359	p=GetVirtualPixels(image,0,y,image->columns,1,exception);
360	if (p == (const Quantum *) NULL)
361	break;
362	bit=0;
363	byte=0;
364	for (x=0; x < (ssize_t) image->columns; x++)
365	{
366	if (GetPixelIntensity(image,p) < ((Quantum) QuantumRange/2.0))
367	byte\|=0x1 << (7-bit);
368	bit++;
369	if (bit == 8)
370	{
371	(void) WriteBlobByte(image,byte);
372	bit=0;
373	byte=0;
374	}
375	p+=GetPixelChannels(image);
376	}
377	if (bit != 0)
378	(void) WriteBlobByte(image,byte);
379	if (image->previous == (Image *) NULL)
380	{
381	status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
382	image->rows);
383	if (status == MagickFalse)
384	break;
385	}
386	}
387	(void) CloseBlob(image);
388	return(MagickTrue);
389	}

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