/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % 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 % % Cristy % % July 1992 % % % % % % Copyright 1999-2021 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 % % % % https://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 "MagickCore/studio.h" #include "MagickCore/attribute.h" #include "MagickCore/blob.h" #include "MagickCore/blob-private.h" #include "MagickCore/cache.h" #include "MagickCore/color-private.h" #include "MagickCore/colormap.h" #include "MagickCore/colorspace.h" #include "MagickCore/colorspace-private.h" #include "MagickCore/exception.h" #include "MagickCore/exception-private.h" #include "MagickCore/image.h" #include "MagickCore/image-private.h" #include "MagickCore/list.h" #include "MagickCore/magick.h" #include "MagickCore/memory_.h" #include "MagickCore/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/module.h" /* Forward declarations. */ static MagickBooleanType WriteMONOImage(const ImageInfo *,Image *,ExceptionInfo *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % 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; MagickBooleanType status; Quantum *q; ssize_t x; size_t bit, byte; ssize_t y; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); image=AcquireImage(image_info,exception); 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); } if (DiscardBlobBytes(image,image->offset) == MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); /* Initialize image colormap. */ image->depth=1; if (AcquireImageColormap(image,2,exception) == MagickFalse) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); if (image_info->ping != MagickFalse) { (void) CloseBlob(image); return(GetFirstImageInList(image)); } status=SetImageExtent(image,image->columns,image->rows,exception); if (status == MagickFalse) return(DestroyImageList(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 == (Quantum *) NULL) break; bit=0; byte=0; for (x=0; x < (ssize_t) image->columns; x++) { if (bit == 0) byte=(size_t) ReadBlobByte(image); if (image_info->endian == LSBEndian) SetPixelIndex(image,((byte & 0x01) != 0) ? 0x00 : 0x01,q); else SetPixelIndex(image,((byte & 0x01) != 0) ? 0x01 : 0x00,q); bit++; if (bit == 8) bit=0; byte>>=1; q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } (void) SyncImage(image,exception); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); (void) 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: % % size_t RegisterMONOImage(void) % */ ModuleExport size_t RegisterMONOImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("MONO","MONO","Raw bi-level bitmap"); entry->decoder=(DecodeImageHandler *) ReadMONOImage; entry->encoder=(EncodeImageHandler *) WriteMONOImage; entry->flags|=CoderRawSupportFlag; entry->flags|=CoderEndianSupportFlag; entry->flags^=CoderAdjoinFlag; (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,ExceptionInfo *exception) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. % % o exception: return any errors or warnings in this structure. % */ static MagickBooleanType WriteMONOImage(const ImageInfo *image_info, Image *image,ExceptionInfo *exception) { MagickBooleanType status; const Quantum *p; ssize_t x; size_t bit, byte; ssize_t y; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); assert(image != (Image *) NULL); assert(image->signature == MagickCoreSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); if (status == MagickFalse) return(status); (void) TransformImageColorspace(image,sRGBColorspace,exception); /* Convert image to a bi-level image. */ (void) SetImageType(image,BilevelType,exception); for (y=0; y < (ssize_t) image->rows; y++) { p=GetVirtualPixels(image,0,y,image->columns,1,exception); if (p == (const Quantum *) NULL) break; bit=0; byte=0; for (x=0; x < (ssize_t) image->columns; x++) { byte>>=1; if (image->endian == LSBEndian) { if (GetPixelLuma(image,p) < (QuantumRange/2.0)) byte|=0x80; } else if (GetPixelLuma(image,p) >= (QuantumRange/2.0)) byte|=0x80; bit++; if (bit == 8) { (void) WriteBlobByte(image,(unsigned char) byte); bit=0; byte=0; } p+=GetPixelChannels(image); } if (bit != 0) (void) WriteBlobByte(image,(unsigned char) (byte >> (8-bit))); status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } (void) CloseBlob(image); return(MagickTrue); }