/coders/pix.c
C | 306 lines | 171 code | 8 blank | 127 comment | 63 complexity | b1be2c77dae8c7f305bdfd5c4abbe7ed MD5 | raw file
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % PPPP IIIII X X %
- % P P I X X %
- % PPPP I X %
- % P I X X %
- % P IIIII X X %
- % %
- % %
- % Read Alias/Wavefront RLE Image 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/blob.h"
- #include "MagickCore/blob-private.h"
- #include "MagickCore/cache.h"
- #include "MagickCore/colormap.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"
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % R e a d P I X I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % ReadPIXImage() reads a Alias/Wavefront RLE 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 ReadPIXImage method is:
- %
- % Image *ReadPIXImage(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 *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
- {
- Image
- *image;
- MagickBooleanType
- status;
- Quantum
- blue,
- green,
- index,
- red;
- register ssize_t
- x;
- register Quantum
- *q;
- size_t
- bits_per_pixel,
- height,
- length,
- width;
- 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);
- status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
- if (status == MagickFalse)
- {
- image=DestroyImageList(image);
- return((Image *) NULL);
- }
- /*
- Read PIX image.
- */
- width=ReadBlobMSBShort(image);
- height=ReadBlobMSBShort(image);
- (void) ReadBlobMSBShort(image); /* x-offset */
- (void) ReadBlobMSBShort(image); /* y-offset */
- bits_per_pixel=ReadBlobMSBShort(image);
- if ((width == 0UL) || (height == 0UL) || ((bits_per_pixel != 8) &&
- (bits_per_pixel != 24)))
- ThrowReaderException(CorruptImageError,"ImproperImageHeader");
- do
- {
- /*
- Initialize image structure.
- */
- image->columns=width;
- image->rows=height;
- if (bits_per_pixel == 8)
- if (AcquireImageColormap(image,256,exception) == MagickFalse)
- ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
- if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
- if (image->scene >= (image_info->scene+image_info->number_scenes-1))
- break;
- status=SetImageExtent(image,image->columns,image->rows,exception);
- if (status == MagickFalse)
- return(DestroyImageList(image));
- /*
- Convert PIX raster image to pixel packets.
- */
- red=(Quantum) 0;
- green=(Quantum) 0;
- blue=(Quantum) 0;
- index=0;
- length=0;
- for (y=0; y < (ssize_t) image->rows; y++)
- {
- q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
- if (q == (Quantum *) NULL)
- break;
- for (x=0; x < (ssize_t) image->columns; x++)
- {
- if (length == 0)
- {
- length=(size_t) ReadBlobByte(image);
- if (bits_per_pixel == 8)
- index=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
- else
- {
- blue=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
- green=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
- red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
- }
- }
- if (image->storage_class == PseudoClass)
- SetPixelIndex(image,index,q);
- SetPixelBlue(image,blue,q);
- SetPixelGreen(image,green,q);
- SetPixelRed(image,red,q);
- length--;
- q+=GetPixelChannels(image);
- }
- if (SyncAuthenticPixels(image,exception) == MagickFalse)
- break;
- if (image->previous == (Image *) NULL)
- {
- status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
- image->rows);
- if (status == MagickFalse)
- break;
- }
- }
- if (image->storage_class == PseudoClass)
- (void) SyncImage(image,exception);
- if (EOFBlob(image) != MagickFalse)
- {
- ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
- image->filename);
- break;
- }
- /*
- Proceed to next image.
- */
- if (image_info->number_scenes != 0)
- if (image->scene >= (image_info->scene+image_info->number_scenes-1))
- break;
- width=ReadBlobMSBLong(image);
- height=ReadBlobMSBLong(image);
- (void) ReadBlobMSBShort(image);
- (void) ReadBlobMSBShort(image);
- bits_per_pixel=ReadBlobMSBShort(image);
- status=(width != 0UL) && (height == 0UL) && ((bits_per_pixel == 8) ||
- (bits_per_pixel == 24)) ? MagickTrue : MagickFalse;
- if (status != MagickFalse)
- {
- /*
- Allocate next image structure.
- */
- AcquireNextImage(image_info,image,exception);
- if (GetNextImageInList(image) == (Image *) NULL)
- {
- image=DestroyImageList(image);
- return((Image *) NULL);
- }
- image=SyncNextImageInList(image);
- status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
- GetBlobSize(image));
- if (status == MagickFalse)
- break;
- }
- } while (status != MagickFalse);
- (void) CloseBlob(image);
- return(GetFirstImageInList(image));
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % R e g i s t e r P I X I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % RegisterPIXImage() adds attributes for the PIX 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 RegisterPIXImage method is:
- %
- % size_t RegisterPIXImage(void)
- %
- */
- ModuleExport size_t RegisterPIXImage(void)
- {
- MagickInfo
- *entry;
- entry=AcquireMagickInfo("PIX","PIX","Alias/Wavefront RLE image format");
- entry->decoder=(DecodeImageHandler *) ReadPIXImage;
- (void) RegisterMagickInfo(entry);
- return(MagickImageCoderSignature);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % U n r e g i s t e r P I X I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % UnregisterPIXImage() removes format registrations made by the
- % PIX module from the list of supported formats.
- %
- % The format of the UnregisterPIXImage method is:
- %
- % UnregisterPIXImage(void)
- %
- */
- ModuleExport void UnregisterPIXImage(void)
- {
- (void) UnregisterMagickInfo("PIX");
- }