| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % OOO TTTTT BBBB % |
| % O O T B B % |
| % O O T BBBB % |
| % O O T B B % |
| % OOO T BBBB % |
| % % |
| % % |
| % Read/Write On-The-Air Image Format % |
| % % |
| % Software Design % |
| % John Cristy % |
| % January 2000 % |
| % % |
| % % |
| % Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization % |
| % dedicated to making software imaging solutions freely available. % |
| % % |
| % You may not use this file except in compliance with the License. You may % |
| % obtain a copy of the License at % |
| % % |
| % http://www.imagemagick.org/script/license.php % |
| % % |
| % Unless required by applicable law or agreed to in writing, software % |
| % distributed under the License is distributed on an "AS IS" BASIS, % |
| % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| % See the License for the specific language governing permissions and % |
| % limitations under the License. % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % |
| */ |
| /* |
| Include declarations. |
| */ |
| #include "magick/studio.h" |
| #include "magick/blob.h" |
| #include "magick/blob-private.h" |
| #include "magick/cache.h" |
| #include "magick/color-private.h" |
| #include "magick/colormap.h" |
| #include "magick/colorspace.h" |
| #include "magick/exception.h" |
| #include "magick/exception-private.h" |
| #include "magick/image.h" |
| #include "magick/image-private.h" |
| #include "magick/list.h" |
| #include "magick/magick.h" |
| #include "magick/memory_.h" |
| #include "magick/monitor.h" |
| #include "magick/monitor-private.h" |
| #include "magick/quantum-private.h" |
| #include "magick/static.h" |
| #include "magick/string_.h" |
| #include "magick/module.h" |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WriteOTBImage(const ImageInfo *,Image *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d O T B I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadOTBImage() reads a on-the-air (level 0) bitmap and returns it. It |
| % allocates the memory necessary for the new Image structure and returns a |
| % pointer to the new image. |
| % |
| % The format of the ReadOTBImage method is: |
| % |
| % Image *ReadOTBImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image_info: the image info. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| % |
| */ |
| static Image *ReadOTBImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| #define GetBit(a,i) (((a) >> (i)) & 1L) |
| |
| Image |
| *image; |
| |
| int |
| byte; |
| |
| ssize_t |
| y; |
| |
| MagickBooleanType |
| status; |
| |
| register IndexPacket |
| *indexes; |
| |
| register ssize_t |
| x; |
| |
| register PixelPacket |
| *q; |
| |
| unsigned char |
| bit, |
| info, |
| depth; |
| |
| /* |
| Open image file. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickSignature); |
| if (image_info->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
| image_info->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickSignature); |
| image=AcquireImage(image_info); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| /* |
| Initialize image structure. |
| */ |
| info=(unsigned char) ReadBlobByte(image); |
| if (GetBit(info,4) == 0) |
| { |
| image->columns=(size_t) ReadBlobByte(image); |
| image->rows=(size_t) ReadBlobByte(image); |
| } |
| else |
| { |
| image->columns=(size_t) ReadBlobMSBShort(image); |
| image->rows=(size_t) ReadBlobMSBShort(image); |
| } |
| if ((image->columns == 0) || (image->rows == 0)) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| depth=(unsigned char) ReadBlobByte(image); |
| if (depth != 1) |
| ThrowReaderException(CoderError,"OnlyLevelZerofilesSupported"); |
| if (AcquireImageColormap(image,2) == MagickFalse) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| if (image_info->ping != MagickFalse) |
| { |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| /* |
| Convert bi-level image to pixel packets. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (PixelPacket *) NULL) |
| break; |
| indexes=GetAuthenticIndexQueue(image); |
| bit=0; |
| byte=0; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| if (bit == 0) |
| { |
| byte=ReadBlobByte(image); |
| if (byte == EOF) |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| } |
| indexes[x]=(IndexPacket) ((byte & (0x01 << (7-bit))) ? 0x00 : 0x01); |
| bit++; |
| if (bit == 8) |
| bit=0; |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| (void) SyncImage(image); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r O T B I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterOTBImage() adds attributes for the OTB image format to |
| % the list of supported formats. The attributes include the image format |
| % tag, a method to read and/or write the format, whether the format |
| % supports the saving of more than one frame to the same file or blob, |
| % whether the format supports native in-memory I/O, and a brief |
| % description of the format. |
| % |
| % The format of the RegisterOTBImage method is: |
| % |
| % size_t RegisterOTBImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterOTBImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=SetMagickInfo("OTB"); |
| entry->decoder=(DecodeImageHandler *) ReadOTBImage; |
| entry->encoder=(EncodeImageHandler *) WriteOTBImage; |
| entry->adjoin=MagickFalse; |
| entry->description=ConstantString("On-the-air bitmap"); |
| entry->module=ConstantString("OTB"); |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r O T B I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterOTBImage() removes format registrations made by the |
| % OTB module from the list of supported formats. |
| % |
| % The format of the UnregisterOTBImage method is: |
| % |
| % UnregisterOTBImage(void) |
| % |
| */ |
| ModuleExport void UnregisterOTBImage(void) |
| { |
| (void) UnregisterMagickInfo("OTB"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e O T B I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WriteOTBImage() writes an image to a file in the On-the-air Bitmap |
| % (level 0) image format. |
| % |
| % The format of the WriteOTBImage method is: |
| % |
| % MagickBooleanType WriteOTBImage(const ImageInfo *image_info,Image *image) |
| % |
| % A description of each parameter follows. |
| % |
| % o image_info: the image info. |
| % |
| % o image: The image. |
| % |
| % |
| */ |
| static MagickBooleanType WriteOTBImage(const ImageInfo *image_info,Image *image) |
| { |
| #define SetBit(a,i,set) \ |
| a=(unsigned char) ((set) ? (a) | (1L << (i)) : (a) & ~(1L << (i))) |
| |
| ssize_t |
| y; |
| |
| MagickBooleanType |
| status; |
| |
| register const PixelPacket |
| *p; |
| |
| register ssize_t |
| x; |
| |
| unsigned char |
| bit, |
| byte, |
| info; |
| |
| /* |
| Open output image file. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickSignature); |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception); |
| if (status == MagickFalse) |
| return(status); |
| if (image->colorspace != RGBColorspace) |
| (void) TransformImageColorspace(image,RGBColorspace); |
| /* |
| Convert image to a bi-level image. |
| */ |
| (void) SetImageType(image,BilevelType); |
| info=0; |
| if ((image->columns >= 256) || (image->rows >= 256)) |
| SetBit(info,4,1); |
| (void) WriteBlobByte(image,info); |
| if ((image->columns >= 256) || (image->rows >= 256)) |
| { |
| (void) WriteBlobMSBShort(image,(unsigned short) image->columns); |
| (void) WriteBlobMSBShort(image,(unsigned short) image->rows); |
| } |
| else |
| { |
| (void) WriteBlobByte(image,(unsigned char) image->columns); |
| (void) WriteBlobByte(image,(unsigned char) image->rows); |
| } |
| (void) WriteBlobByte(image,1); /* depth */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception); |
| if (p == (const PixelPacket *) NULL) |
| break; |
| bit=0; |
| byte=0; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| if (PixelIntensity(p) < ((Quantum) QuantumRange/2.0)) |
| byte|=0x1 << (7-bit); |
| bit++; |
| if (bit == 8) |
| { |
| (void) WriteBlobByte(image,byte); |
| bit=0; |
| byte=0; |
| } |
| p++; |
| } |
| if (bit != 0) |
| (void) WriteBlobByte(image,byte); |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |
