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% Copyright (C) 2003 GraphicsMagick Group
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% Copyright (C) 2002 ImageMagick Studio
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% Copyright 1991-1999 E. I. du Pont de Nemours and Company
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% This program is covered by multiple licenses, which are described in
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% Copyright.txt. You should have received a copy of Copyright.txt with this
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% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Read/Write X Windows System Bitmap Format. %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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#include "magick/studio.h"
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#include "magick/blob.h"
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#include "magick/cache.h"
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#include "magick/magick.h"
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#include "magick/monitor.h"
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#include "magick/utility.h"
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WriteXBMImage(const ImageInfo *,Image *);
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Method IsXBM returns True if the image format type, identified by the
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% magick string, is XBM.
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% The format of the IsXBM method is:
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% unsigned int IsXBM(const unsigned char *magick,const size_t length)
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% A description of each parameter follows:
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% o status: Method IsXBM returns True if the image format type is XBM.
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% o magick: This string is generally the first few bytes of an image file
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% o length: Specifies the length of the magick string.
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static unsigned int IsXBM(const unsigned char *magick,const size_t length)
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if (LocaleNCompare((char *) magick,"#define",7) == 0)
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% R e a d X B M I m a g e %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Method ReadXBMImage reads an X11 bitmap image file and returns it. It
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% allocates the memory necessary for the new Image structure and returns a
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% pointer to the new image.
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% The format of the ReadXBMImage method is:
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% Image *ReadXBMImage(const ImageInfo *image_info,ExceptionInfo *exception)
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% A description of each parameter follows:
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% o image: Method ReadXBMImage returns a pointer to the image after
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% reading. A null image is returned if there is a memory shortage or
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% if the image cannot be read.
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% o image_info: Specifies a pointer to a ImageInfo structure.
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% o exception: return any errors or warnings in this structure.
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static int XBMInteger(Image *image,short int *hex_digits)
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c=ReadBlobByte(image);
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value=(value << 4)+hex_digits[c];
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if ((hex_digits[c]) < 0 && flag)
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static Image *ReadXBMImage(const ImageInfo *image_info,ExceptionInfo *exception)
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buffer[MaxTextExtent],
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register unsigned char
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickSignature);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickSignature);
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image=AllocateImage(image_info);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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ThrowReaderException(FileOpenError,UnableToOpenFile,image);
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Read X bitmap header.
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while (ReadBlobString(image,buffer) != (char *) NULL)
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if (sscanf(buffer,"#define %s %lu",name,&image->columns) == 2)
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if ((strlen(name) >= 6) &&
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(LocaleCompare(name+strlen(name)-6,"_width") == 0))
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while (ReadBlobString(image,buffer) != (char *) NULL)
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if (sscanf(buffer,"#define %s %lu",name,&image->rows) == 2)
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if ((strlen(name) >= 7) &&
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(LocaleCompare(name+strlen(name)-7,"_height") == 0))
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image->storage_class=PseudoClass;
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Scan until hex digits.
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while (ReadBlobString(image,buffer) != (char *) NULL)
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if (sscanf(buffer,"static short %s = {",name) == 1)
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if (sscanf(buffer,"static unsigned char %s = {",name) == 1)
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if (sscanf(buffer,"static char %s = {",name) == 1)
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p=(unsigned char *) strrchr(name,'_');
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if (p == (unsigned char *) NULL)
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p=(unsigned char *) name;
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if (LocaleCompare("bits[]",(char *) p) == 0)
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if ((image->columns == 0) || (image->rows == 0) || EOFBlob(image))
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ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
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Initialize image structure.
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if (!AllocateImageColormap(image,image->colors))
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ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image);
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if ((image->columns % 16) && ((image->columns % 16) < 9) && (version == 10))
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bytes_per_line=(image->columns+7)/8+padding;
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data=MagickAllocateMemory(unsigned char *,bytes_per_line*image->rows);
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if (data == (unsigned char *) NULL)
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ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image);
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image->colormap[0].red=MaxRGB;
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image->colormap[0].green=MaxRGB;
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image->colormap[0].blue=MaxRGB;
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image->colormap[1].red=0;
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image->colormap[1].green=0;
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image->colormap[1].blue=0;
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if (image_info->ping)
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Initialize hex values.
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hex_digits[' ']=(-1);
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hex_digits[',']=(-1);
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hex_digits['}']=(-1);
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hex_digits['\n']=(-1);
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hex_digits['\t']=(-1);
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for (i=0; i < (long) (bytes_per_line*image->rows); (i+=2))
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value=XBMInteger(image,hex_digits);
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*p++=(unsigned char) value;
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if (!padding || ((i+2) % bytes_per_line))
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*p++=(unsigned char) (value >> 8);
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for (i=0; i < (long) (bytes_per_line*image->rows); i++)
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value=XBMInteger(image,hex_digits);
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*p++=(unsigned char) value;
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Convert X bitmap image to pixel packets.
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for (y=0; y < (long) image->rows; y++)
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q=SetImagePixels(image,0,y,image->columns,1);
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if (q == (PixelPacket *) NULL)
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indexes=GetIndexes(image);
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for (x=0; x < (long) image->columns; x++)
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indexes[x]=byte & 0x01 ? 0x01 : 0x00;
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if (!SyncImagePixels(image))
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if (QuantumTick(y,image->rows))
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if (!MagickMonitor(LoadImageText,y,image->rows,exception))
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MagickFreeMemory(data);
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% R e g i s t e r X B M I m a g e %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Method RegisterXBMImage adds attributes for the XBM image format to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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% The format of the RegisterXBMImage method is:
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% RegisterXBMImage(void)
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ModuleExport void RegisterXBMImage(void)
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entry=SetMagickInfo("XBM");
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entry->decoder=(DecoderHandler) ReadXBMImage;
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entry->encoder=(EncoderHandler) WriteXBMImage;
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entry->magick=(MagickHandler) IsXBM;
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AcquireString("X Windows system bitmap (black and white)");
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entry->module=AcquireString("XBM");
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(void) RegisterMagickInfo(entry);
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% U n r e g i s t e r X B M I m a g e %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Method UnregisterXBMImage removes format registrations made by the
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% XBM module from the list of supported formats.
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% The format of the UnregisterXBMImage method is:
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% UnregisterXBMImage(void)
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ModuleExport void UnregisterXBMImage(void)
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(void) UnregisterMagickInfo("XBM");
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% W r i t e X B M I m a g e %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Procedure WriteXBMImage writes an image to a file in the X bitmap format.
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% The format of the WriteXBMImage method is:
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% unsigned int WriteXBMImage(const ImageInfo *image_info,Image *image)
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% A description of each parameter follows.
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% o status: Method WriteXBMImage return True if the image is written.
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% False is returned is there is a memory shortage or if the image file
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% o image_info: Specifies a pointer to a ImageInfo structure.
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% o image: A pointer to an Image structure.
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static unsigned int WriteXBMImage(const ImageInfo *image_info,Image *image)
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basename[MaxTextExtent],
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buffer[MaxTextExtent];
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register const PixelPacket
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Open output image file.
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickSignature);
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assert(image != (Image *) NULL);
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assert(image->signature == MagickSignature);
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
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ThrowWriterException(FileOpenError,UnableToOpenFile,image);
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TransformColorspace(image,RGBColorspace);
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Write X bitmap header.
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GetPathComponent(image->filename,BasePath,basename);
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FormatString(buffer,"#define %.1024s_width %lu\n",basename,image->columns);
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(void) WriteBlob(image,strlen(buffer),buffer);
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FormatString(buffer,"#define %.1024s_height %lu\n",basename,image->rows);
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(void) WriteBlob(image,strlen(buffer),buffer);
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FormatString(buffer,"static char %.1024s_bits[] = {\n",basename);
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(void) WriteBlob(image,strlen(buffer),buffer);
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(void) strcpy(buffer," ");
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(void) WriteBlob(image,strlen(buffer),buffer);
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Convert MIFF to X bitmap pixels.
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SetImageType(image,BilevelType);
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polarity=(PixelIntensityToQuantum(&image->colormap[0]) < (MaxRGB/2));
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if (image->colors == 2)
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polarity=(PixelIntensityToQuantum(&image->colormap[0]) <
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PixelIntensityToQuantum(&image->colormap[1]));
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(void) strcpy(buffer," ");
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(void) WriteBlob(image,strlen(buffer),buffer);
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for (y=0; y < (long) image->rows; y++)
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p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
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if (p == (const PixelPacket *) NULL)
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indexes=GetIndexes(image);
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for (x=0; x < (long) image->columns; x++)
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if (indexes[x] != polarity)
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Write a bitmap byte to the image file.
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FormatString(buffer,"0x%02X, ",(unsigned int) (byte & 0xff));
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(void) WriteBlob(image,strlen(buffer),buffer);
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(void) strcpy(buffer,"\n ");
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(void) WriteBlob(image,strlen(buffer),buffer);
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Write a bitmap byte to the image file.
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FormatString(buffer,"0x%02X, ",(unsigned int) (byte & 0xff));
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(void) WriteBlob(image,strlen(buffer),buffer);
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(void) strcpy(buffer,"\n ");
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(void) WriteBlob(image,strlen(buffer),buffer);
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if (QuantumTick(y,image->rows))
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if (!MagickMonitor(SaveImageText,y,image->rows,&image->exception))
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(void) strcpy(buffer,"};\n");
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(void) WriteBlob(image,strlen(buffer),buffer);
added
removed
coders/xbm.c
