| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W W BBBB M M PPPP % |
| % W W B B MM MM P P % |
| % W W W BBBB M M M PPPP % |
| % WW WW B B M M P % |
| % W W BBBB M M P % |
| % % |
| % % |
| % Read/Write Wireless Bitmap (level 0) Image Format % |
| % % |
| % Software Design % |
| % John Cristy % |
| % January 2000 % |
| % % |
| % % |
| % Copyright 1999-2011 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/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 |
| WriteWBMPImage(const ImageInfo *,Image *,ExceptionInfo *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d W B M P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadWBMPImage() reads a WBMP (level 0) image file and returns it. It |
| % allocates the memory necessary for the new Image structure and returns a |
| % pointer to the new image. |
| % |
| % ReadWBMPImage was contributed by Milan Votava <votava@mageo.cz>. |
| % |
| % The format of the ReadWBMPImage method is: |
| % |
| % Image *ReadWBMPImage(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 MagickBooleanType WBMPReadInteger(Image *image,size_t *value) |
| { |
| int |
| byte; |
| |
| *value=0; |
| do |
| { |
| byte=ReadBlobByte(image); |
| if (byte == EOF) |
| return(MagickFalse); |
| *value<<=7; |
| *value|=(unsigned int) (byte & 0x7f); |
| } while (byte & 0x80); |
| return(MagickTrue); |
| } |
| |
| static Image *ReadWBMPImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| int |
| byte; |
| |
| MagickBooleanType |
| status; |
| |
| register ssize_t |
| x; |
| |
| register Quantum |
| *q; |
| |
| ssize_t |
| y; |
| |
| unsigned char |
| bit; |
| |
| unsigned short |
| header; |
| |
| /* |
| 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,exception); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| if (ReadBlob(image,2,(unsigned char *) &header) == 0) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| if (header != 0) |
| ThrowReaderException(CoderError,"OnlyLevelZerofilesSupported"); |
| /* |
| Initialize image structure. |
| */ |
| if (WBMPReadInteger(image,&image->columns) == MagickFalse) |
| ThrowReaderException(CorruptImageError,"CorruptWBMPimage"); |
| if (WBMPReadInteger(image,&image->rows) == MagickFalse) |
| ThrowReaderException(CorruptImageError,"CorruptWBMPimage"); |
| if ((image->columns == 0) || (image->rows == 0)) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| if (DiscardBlobBytes(image,image->offset) == MagickFalse) |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| if (AcquireImageColormap(image,2,exception) == 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 == (Quantum *) NULL) |
| break; |
| 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"); |
| } |
| SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 1 : 0,q); |
| bit++; |
| 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; |
| } |
| (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 W B M P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterWBMPImage() adds attributes for the WBMP 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 RegisterWBMPImage method is: |
| % |
| % size_t RegisterWBMPImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterWBMPImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=SetMagickInfo("WBMP"); |
| entry->decoder=(DecodeImageHandler *) ReadWBMPImage; |
| entry->encoder=(EncodeImageHandler *) WriteWBMPImage; |
| entry->adjoin=MagickFalse; |
| entry->description=ConstantString("Wireless Bitmap (level 0) image"); |
| entry->module=ConstantString("WBMP"); |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r W B M P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterWBMPImage() removes format registrations made by the |
| % WBMP module from the list of supported formats. |
| % |
| % The format of the UnregisterWBMPImage method is: |
| % |
| % UnregisterWBMPImage(void) |
| % |
| */ |
| ModuleExport void UnregisterWBMPImage(void) |
| { |
| (void) UnregisterMagickInfo("WBMP"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e W B M P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WriteWBMPImage() writes an image to a file in the Wireless Bitmap |
| % (level 0) image format. |
| % |
| % WriteWBMPImage was contributed by Milan Votava <votava@mageo.cz>. |
| % |
| % The format of the WriteWBMPImage method is: |
| % |
| % MagickBooleanType WriteWBMPImage(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 void WBMPWriteInteger(Image *image,const size_t value) |
| { |
| int |
| bits, |
| flag, |
| n; |
| |
| register ssize_t |
| i; |
| |
| unsigned char |
| buffer[5], |
| octet; |
| |
| n=1; |
| bits=28; |
| flag=MagickFalse; |
| for (i=4; i >= 0; i--) |
| { |
| octet=(unsigned char) ((value >> bits) & 0x7f); |
| if ((flag == 0) && (octet != 0)) |
| { |
| flag=MagickTrue; |
| n=i+1; |
| } |
| buffer[4-i]=octet | (i && (flag || octet))*(0x01 << 7); |
| bits-=7; |
| } |
| (void) WriteBlob(image,(size_t) n,buffer+5-n); |
| } |
| |
| static MagickBooleanType WriteWBMPImage(const ImageInfo *image_info, |
| Image *image,ExceptionInfo *exception) |
| { |
| MagickBooleanType |
| status; |
| |
| register const Quantum |
| *p; |
| |
| register ssize_t |
| x; |
| |
| ssize_t |
| y; |
| |
| unsigned char |
| 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); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickSignature); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| return(status); |
| if (IsRGBColorspace(image->colorspace) == MagickFalse) |
| (void) TransformImageColorspace(image,RGBColorspace); |
| /* |
| Convert image to a bi-level image. |
| */ |
| (void) SetImageType(image,BilevelType,exception); |
| (void) WriteBlobMSBShort(image,0); |
| WBMPWriteInteger(image,image->columns); |
| WBMPWriteInteger(image,image->rows); |
| 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++) |
| { |
| if (GetPixelIntensity(image,p) >= ((MagickRealType) QuantumRange/2.0)) |
| byte|=0x1 << (7-bit); |
| bit++; |
| if (bit == 8) |
| { |
| (void) WriteBlobByte(image,byte); |
| bit=0; |
| byte=0; |
| } |
| p+=GetPixelChannels(image); |
| } |
| if (bit != 0) |
| (void) WriteBlobByte(image,byte); |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |