/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % H H RRRR ZZZZZ % % H H R R ZZ % % HHHHH RRRR Z % % H H R R ZZ % % H H R R ZZZZZ % % % % % % Read/Write Slow Scan TeleVision Image Format % % % % Software Design % % John Cristy % % July 1992 % % % % % % Copyright 1999-2012 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/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 WriteHRZImage(const ImageInfo *,Image *,ExceptionInfo *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d H R Z I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadHRZImage() reads a Slow Scan TeleVision 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 ReadHRZImage method is: % % Image *ReadHRZImage(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 *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception) { Image *image; MagickBooleanType status; register ssize_t x; register Quantum *q; register unsigned char *p; ssize_t count, y; size_t length; unsigned char *pixels; /* 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); } /* Convert HRZ raster image to pixel packets. */ image->columns=256; image->rows=240; image->depth=8; pixels=(unsigned char *) AcquireQuantumMemory(image->columns,3* sizeof(*pixels)); if (pixels == (unsigned char *) NULL) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); length=(size_t) (3*image->columns); for (y=0; y < (ssize_t) image->rows; y++) { count=ReadBlob(image,length,pixels); if ((size_t) count != length) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); p=pixels; q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { SetPixelRed(image,4*ScaleCharToQuantum(*p++),q); SetPixelGreen(image,4*ScaleCharToQuantum(*p++),q); SetPixelBlue(image,4*ScaleCharToQuantum(*p++),q); SetPixelAlpha(image,OpaqueAlpha,q); q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse) break; } pixels=(unsigned char *) RelinquishMagickMemory(pixels); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); (void) CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r H R Z I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterHRZImage() adds attributes for the HRZ X 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 RegisterHRZImage method is: % % size_t RegisterHRZImage(void) % */ ModuleExport size_t RegisterHRZImage(void) { MagickInfo *entry; entry=SetMagickInfo("HRZ"); entry->decoder=(DecodeImageHandler *) ReadHRZImage; entry->encoder=(EncodeImageHandler *) WriteHRZImage; entry->adjoin=MagickFalse; entry->description=ConstantString("Slow Scan TeleVision"); entry->module=ConstantString("HRZ"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r H R Z I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterHRZImage() removes format registrations made by the % HRZ module from the list of supported formats. % % The format of the UnregisterHRZImage method is: % % UnregisterHRZImage(void) % */ ModuleExport void UnregisterHRZImage(void) { (void) UnregisterMagickInfo("HRZ"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e H R Z I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteHRZImage() writes an image to a file in HRZ X image format. % % The format of the WriteHRZImage method is: % % MagickBooleanType WriteHRZImage(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 WriteHRZImage(const ImageInfo *image_info,Image *image, ExceptionInfo *exception) { Image *hrz_image; MagickBooleanType status; register const Quantum *p; register ssize_t x, y; register unsigned char *q; ssize_t count; unsigned char *pixels; /* 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); hrz_image=ResizeImage(image,256,240,image->filter,exception); if (hrz_image == (Image *) NULL) return(MagickFalse); if (IsRGBColorspace(hrz_image->colorspace) == MagickFalse) (void) TransformImageColorspace(hrz_image,RGBColorspace,exception); /* Allocate memory for pixels. */ pixels=(unsigned char *) AcquireQuantumMemory((size_t) hrz_image->columns, 3*sizeof(*pixels)); if (pixels == (unsigned char *) NULL) { hrz_image=DestroyImage(hrz_image); ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); } /* Convert MIFF to HRZ raster pixels. */ for (y=0; y < (ssize_t) hrz_image->rows; y++) { p=GetVirtualPixels(hrz_image,0,y,hrz_image->columns,1,exception); if (p == (const Quantum *) NULL) break; q=pixels; for (x=0; x < (ssize_t) hrz_image->columns; x++) { *q++=ScaleQuantumToChar(GetPixelRed(hrz_image,p))/4; *q++=ScaleQuantumToChar(GetPixelGreen(hrz_image,p))/4; *q++=ScaleQuantumToChar(GetPixelBlue(hrz_image,p))/4; p+=GetPixelChannels(hrz_image); } count=WriteBlob(image,(size_t) (q-pixels),pixels); if (count != (ssize_t) (q-pixels)) break; status=SetImageProgress(image,SaveImageTag,y,hrz_image->rows); if (status == MagickFalse) break; } pixels=(unsigned char *) RelinquishMagickMemory(pixels); hrz_image=DestroyImage(hrz_image); (void) CloseBlob(image); return(MagickTrue); }