| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % X X BBBB M M % |
| % X X B B MM MM % |
| % X BBBB M M M % |
| % X X B B M M % |
| % X X BBBB M M % |
| % % |
| % % |
| % Read/Write X Windows System Bitmap Format % |
| % % |
| % Software Design % |
| % Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2016 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 "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" |
| #include "MagickCore/utility.h" |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WriteXBMImage(const ImageInfo *,Image *,ExceptionInfo *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % I s X B M % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % IsXBM() returns MagickTrue if the image format type, identified by the |
| % magick string, is XBM. |
| % |
| % The format of the IsXBM method is: |
| % |
| % MagickBooleanType IsXBM(const unsigned char *magick,const size_t length) |
| % |
| % A description of each parameter follows: |
| % |
| % o magick: compare image format pattern against these bytes. |
| % |
| % o length: Specifies the length of the magick string. |
| % |
| */ |
| static MagickBooleanType IsXBM(const unsigned char *magick,const size_t length) |
| { |
| if (length < 7) |
| return(MagickFalse); |
| if (memcmp(magick,"#define",7) == 0) |
| return(MagickTrue); |
| return(MagickFalse); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d X B M I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadXBMImage() reads an X11 bitmap image file 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 ReadXBMImage method is: |
| % |
| % Image *ReadXBMImage(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 unsigned int XBMInteger(Image *image,short int *hex_digits) |
| { |
| int |
| c; |
| |
| unsigned int |
| value; |
| |
| /* |
| Skip any leading whitespace. |
| */ |
| do |
| { |
| c=ReadBlobByte(image); |
| if (c == EOF) |
| return(0); |
| } while ((c == ' ') || (c == '\t') || (c == '\n') || (c == '\r')); |
| /* |
| Evaluate number. |
| */ |
| value=0; |
| do |
| { |
| if (value > (unsigned int) (INT_MAX/10)) |
| break; |
| value*=16; |
| c&=0xff; |
| if (value > (unsigned int) (INT_MAX-hex_digits[c])) |
| break; |
| value+=hex_digits[c]; |
| c=ReadBlobByte(image); |
| if (c == EOF) |
| return(0); |
| } while (hex_digits[c] >= 0); |
| return(value); |
| } |
| |
| static Image *ReadXBMImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| char |
| buffer[MagickPathExtent], |
| name[MagickPathExtent]; |
| |
| Image |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| register ssize_t |
| i, |
| x; |
| |
| register Quantum |
| *q; |
| |
| register unsigned char |
| *p; |
| |
| short int |
| hex_digits[256]; |
| |
| ssize_t |
| y; |
| |
| unsigned char |
| *data; |
| |
| unsigned int |
| bit, |
| byte, |
| bytes_per_line, |
| height, |
| length, |
| padding, |
| value, |
| version, |
| width; |
| |
| /* |
| 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); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| /* |
| Read X bitmap header. |
| */ |
| width=0; |
| height=0; |
| while (ReadBlobString(image,buffer) != (char *) NULL) |
| if (sscanf(buffer,"#define %32s %u",name,&width) == 2) |
| if ((strlen(name) >= 6) && |
| (LocaleCompare(name+strlen(name)-6,"_width") == 0)) |
| break; |
| while (ReadBlobString(image,buffer) != (char *) NULL) |
| if (sscanf(buffer,"#define %32s %u",name,&height) == 2) |
| if ((strlen(name) >= 7) && |
| (LocaleCompare(name+strlen(name)-7,"_height") == 0)) |
| break; |
| image->columns=width; |
| image->rows=height; |
| image->depth=8; |
| image->storage_class=PseudoClass; |
| image->colors=2; |
| /* |
| Scan until hex digits. |
| */ |
| version=11; |
| while (ReadBlobString(image,buffer) != (char *) NULL) |
| { |
| if (sscanf(buffer,"static short %32s = {",name) == 1) |
| version=10; |
| else |
| if (sscanf(buffer,"static unsigned char %32s = {",name) == 1) |
| version=11; |
| else |
| if (sscanf(buffer,"static char %32s = {",name) == 1) |
| version=11; |
| else |
| continue; |
| p=(unsigned char *) strrchr(name,'_'); |
| if (p == (unsigned char *) NULL) |
| p=(unsigned char *) name; |
| else |
| p++; |
| if (LocaleCompare("bits[]",(char *) p) == 0) |
| break; |
| } |
| if ((image->columns == 0) || (image->rows == 0) || |
| (EOFBlob(image) != MagickFalse)) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| /* |
| Initialize image structure. |
| */ |
| if (AcquireImageColormap(image,image->colors,exception) == MagickFalse) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| /* |
| Initialize colormap. |
| */ |
| image->colormap[0].red=QuantumRange; |
| image->colormap[0].green=QuantumRange; |
| image->colormap[0].blue=QuantumRange; |
| image->colormap[1].red=(Quantum) 0; |
| image->colormap[1].green=(Quantum) 0; |
| image->colormap[1].blue=(Quantum) 0; |
| 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)); |
| /* |
| Initialize hex values. |
| */ |
| hex_digits[(int) '0']=0; |
| hex_digits[(int) '1']=1; |
| hex_digits[(int) '2']=2; |
| hex_digits[(int) '3']=3; |
| hex_digits[(int) '4']=4; |
| hex_digits[(int) '5']=5; |
| hex_digits[(int) '6']=6; |
| hex_digits[(int) '7']=7; |
| hex_digits[(int) '8']=8; |
| hex_digits[(int) '9']=9; |
| hex_digits[(int) 'A']=10; |
| hex_digits[(int) 'B']=11; |
| hex_digits[(int) 'C']=12; |
| hex_digits[(int) 'D']=13; |
| hex_digits[(int) 'E']=14; |
| hex_digits[(int) 'F']=15; |
| hex_digits[(int) 'a']=10; |
| hex_digits[(int) 'b']=11; |
| hex_digits[(int) 'c']=12; |
| hex_digits[(int) 'd']=13; |
| hex_digits[(int) 'e']=14; |
| hex_digits[(int) 'f']=15; |
| hex_digits[(int) 'x']=0; |
| hex_digits[(int) ' ']=(-1); |
| hex_digits[(int) ',']=(-1); |
| hex_digits[(int) '}']=(-1); |
| hex_digits[(int) '\n']=(-1); |
| hex_digits[(int) '\t']=(-1); |
| /* |
| Read hex image data. |
| */ |
| padding=0; |
| if (((image->columns % 16) != 0) && ((image->columns % 16) < 9) && |
| (version == 10)) |
| padding=1; |
| bytes_per_line=(unsigned int) (image->columns+7)/8+padding; |
| length=(unsigned int) image->rows; |
| data=(unsigned char *) AcquireQuantumMemory(length,bytes_per_line* |
| sizeof(*data)); |
| if (data == (unsigned char *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| p=data; |
| if (version == 10) |
| for (i=0; i < (ssize_t) (bytes_per_line*image->rows); (i+=2)) |
| { |
| value=XBMInteger(image,hex_digits); |
| *p++=(unsigned char) value; |
| if ((padding == 0) || (((i+2) % bytes_per_line) != 0)) |
| *p++=(unsigned char) (value >> 8); |
| } |
| else |
| for (i=0; i < (ssize_t) (bytes_per_line*image->rows); i++) |
| { |
| value=XBMInteger(image,hex_digits); |
| *p++=(unsigned char) value; |
| } |
| /* |
| Convert X bitmap image to pixel packets. |
| */ |
| p=data; |
| 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) (*p++); |
| SetPixelIndex(image,(Quantum) ((byte & 0x01) != 0 ? 0x01 : 0x00),q); |
| bit++; |
| byte>>=1; |
| if (bit == 8) |
| bit=0; |
| q+=GetPixelChannels(image); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| data=(unsigned char *) RelinquishMagickMemory(data); |
| (void) SyncImage(image,exception); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r X B M I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterXBMImage() adds attributes for the XBM 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 RegisterXBMImage method is: |
| % |
| % size_t RegisterXBMImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterXBMImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("XBM","XBM", |
| "X Windows system bitmap (black and white)"); |
| entry->decoder=(DecodeImageHandler *) ReadXBMImage; |
| entry->encoder=(EncodeImageHandler *) WriteXBMImage; |
| entry->magick=(IsImageFormatHandler *) IsXBM; |
| entry->flags^=CoderAdjoinFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r X B M I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterXBMImage() removes format registrations made by the |
| % XBM module from the list of supported formats. |
| % |
| % The format of the UnregisterXBMImage method is: |
| % |
| % UnregisterXBMImage(void) |
| % |
| */ |
| ModuleExport void UnregisterXBMImage(void) |
| { |
| (void) UnregisterMagickInfo("XBM"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e X B M I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WriteXBMImage() writes an image to a file in the X bitmap format. |
| % |
| % The format of the WriteXBMImage method is: |
| % |
| % MagickBooleanType WriteXBMImage(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 WriteXBMImage(const ImageInfo *image_info,Image *image, |
| ExceptionInfo *exception) |
| { |
| char |
| basename[MagickPathExtent], |
| buffer[MagickPathExtent]; |
| |
| MagickBooleanType |
| status; |
| |
| register const Quantum |
| *p; |
| |
| register ssize_t |
| x; |
| |
| size_t |
| bit, |
| byte; |
| |
| ssize_t |
| count, |
| 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); |
| /* |
| Write X bitmap header. |
| */ |
| GetPathComponent(image->filename,BasePath,basename); |
| (void) FormatLocaleString(buffer,MagickPathExtent,"#define %s_width %.20g\n", |
| basename,(double) image->columns); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| (void) FormatLocaleString(buffer,MagickPathExtent,"#define %s_height %.20g\n", |
| basename,(double) image->rows); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| (void) FormatLocaleString(buffer,MagickPathExtent, |
| "static char %s_bits[] = {\n",basename); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| (void) CopyMagickString(buffer," ",MagickPathExtent); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| /* |
| Convert MIFF to X bitmap pixels. |
| */ |
| (void) SetImageType(image,BilevelType,exception); |
| bit=0; |
| byte=0; |
| count=0; |
| x=0; |
| y=0; |
| (void) CopyMagickString(buffer," ",MagickPathExtent); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=GetVirtualPixels(image,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| byte>>=1; |
| if (GetPixelLuma(image,p) < (QuantumRange/2)) |
| byte|=0x80; |
| bit++; |
| if (bit == 8) |
| { |
| /* |
| Write a bitmap byte to the image file. |
| */ |
| (void) FormatLocaleString(buffer,MagickPathExtent,"0x%02X, ", |
| (unsigned int) (byte & 0xff)); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| count++; |
| if (count == 12) |
| { |
| (void) CopyMagickString(buffer,"\n ",MagickPathExtent); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| count=0; |
| }; |
| bit=0; |
| byte=0; |
| } |
| p+=GetPixelChannels(image); |
| } |
| if (bit != 0) |
| { |
| /* |
| Write a bitmap byte to the image file. |
| */ |
| byte>>=(8-bit); |
| (void) FormatLocaleString(buffer,MagickPathExtent,"0x%02X, ", |
| (unsigned int) (byte & 0xff)); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| count++; |
| if (count == 12) |
| { |
| (void) CopyMagickString(buffer,"\n ",MagickPathExtent); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| count=0; |
| }; |
| bit=0; |
| byte=0; |
| }; |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| (void) CopyMagickString(buffer,"};\n",MagickPathExtent); |
| (void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer); |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |
