/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % M M OOO N N OOO % % MM MM O O NN N O O % % M M M O O N N N O O % % M M O O N NN O O % % M M OOO N N OOO % % % % % % Read/Write Raw Bi-Level Bitmap Format. % % % % Software Design % % John Cristy % % July 1992 % % % % % % Copyright 1999-2007 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/color-private.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/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/module.h" /* Forward declarations. */ static MagickBooleanType WriteMONOImage(const ImageInfo *,Image *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d M O N O I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadMONOImage() reads an image of raw bites in LSB order 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 ReadMONOImage method is: % % Image *ReadMONOImage(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 *ReadMONOImage(const ImageInfo *image_info, ExceptionInfo *exception) { Image *image; long y; MagickBooleanType status; register IndexPacket *indexes; register long x; register PixelPacket *q; register long i; unsigned long bit, byte; /* 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=AllocateImage(image_info); if ((image->columns == 0) || (image->rows == 0)) ThrowReaderException(OptionError,"MustSpecifyImageSize"); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } for (i=0; i < image->offset; i++) if (ReadBlobByte(image) == EOF) { ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); break; } /* Initialize image colormap. */ image->depth=1; if (AllocateImageColormap(image,2) == MagickFalse) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); if (image_info->ping != MagickFalse) { CloseBlob(image); return(GetFirstImageInList(image)); } /* Convert bi-level image to pixel packets. */ if (SetImageExtent(image,0,0) == MagickFalse) { InheritException(exception,&image->exception); return(DestroyImageList(image)); } for (y=0; y < (long) image->rows; y++) { q=SetImagePixels(image,0,y,image->columns,1); if (q == (PixelPacket *) NULL) break; indexes=GetIndexes(image); bit=0; byte=0; for (x=0; x < (long) image->columns; x++) { if (bit == 0) byte=(unsigned long) ReadBlobByte(image); if (image_info->endian == LSBEndian) indexes[x]=(IndexPacket) (((byte & 0x01) != 0) ? 0x00 : 0x01); else indexes[x]=(IndexPacket) (((byte & 0x01) != 0) ? 0x01 : 0x00); bit++; if (bit == 8) bit=0; byte>>=1; } if (SyncImagePixels(image) == MagickFalse) break; if ((image->progress_monitor != (MagickProgressMonitor) NULL) && (QuantumTick(y,image->rows) != MagickFalse)) { status=image->progress_monitor(LoadImageTag,y,image->rows, image->client_data); if (status == MagickFalse) break; } } (void) SyncImage(image); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r M O N O I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterMONOImage() adds attributes for the MONO 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 RegisterMONOImage method is: % % unsigned long RegisterMONOImage(void) % */ ModuleExport unsigned long RegisterMONOImage(void) { MagickInfo *entry; entry=SetMagickInfo("MONO"); entry->decoder=(DecodeImageHandler *) ReadMONOImage; entry->encoder=(EncodeImageHandler *) WriteMONOImage; entry->raw=MagickTrue; entry->endian_support=MagickTrue; entry->adjoin=MagickFalse; entry->description=ConstantString("Raw bi-level bitmap"); entry->module=ConstantString("MONO"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r M O N O I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterMONOImage() removes format registrations made by the % MONO module from the list of supported formats. % % The format of the UnregisterMONOImage method is: % % UnregisterMONOImage(void) % */ ModuleExport void UnregisterMONOImage(void) { (void) UnregisterMagickInfo("MONO"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e M O N O I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteMONOImage() writes an image of raw bits in LSB order to a file. % % The format of the WriteMONOImage method is: % % MagickBooleanType WriteMONOImage(const ImageInfo *image_info, % Image *image) % % A description of each parameter follows. % % o image_info: The image info. % % o image: The image. % */ static MagickBooleanType WriteMONOImage(const ImageInfo *image_info, Image *image) { long y; MagickBooleanType status; register IndexPacket *indexes; register const PixelPacket *p; register long x; unsigned long bit, byte; /* 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_info->colorspace == UndefinedColorspace) (void) SetImageColorspace(image,RGBColorspace); /* Convert image to a bi-level image. */ (void) SetImageType(image,BilevelType); for (y=0; y < (long) image->rows; y++) { p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception); if (p == (const PixelPacket *) NULL) break; indexes=GetIndexes(image); bit=0; byte=0; for (x=0; x < (long) image->columns; x++) { byte>>=1; if (image->endian == LSBEndian) { if (PixelIntensity(p) < ((Quantum) QuantumRange/2.0)) byte|=0x80; } else if (PixelIntensity(p) >= ((Quantum) QuantumRange/2.0)) byte|=0x80; bit++; if (bit == 8) { (void) WriteBlobByte(image,(unsigned char) byte); bit=0; byte=0; } p++; } if (bit != 0) (void) WriteBlobByte(image,(unsigned char) (byte >> (8-bit))); if ((image->progress_monitor != (MagickProgressMonitor) NULL) && (QuantumTick(y,image->rows) != MagickFalse)) { status=image->progress_monitor(SaveImageTag,y,image->rows, image->client_data); if (status == MagickFalse) break; } } CloseBlob(image); return(MagickTrue); }