| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % GGGG RRRR AAA Y Y % |
| % G R R A A Y Y % |
| % G GG RRRR AAAAA Y % |
| % G G R R A A Y % |
| % GGG R R A A Y % |
| % % |
| % % |
| % Read/Write RAW Gray Image Format % |
| % % |
| % Software Design % |
| % Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2015 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/colorspace.h" |
| #include "MagickCore/colorspace-private.h" |
| #include "MagickCore/constitute.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.h" |
| #include "MagickCore/pixel-accessor.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/statistic.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/module.h" |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WriteGRAYImage(const ImageInfo *,Image *,ExceptionInfo *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d G R A Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadGRAYImage() reads an image of raw grayscale samples 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 ReadGRAYImage method is: |
| % |
| % Image *ReadGRAYImage(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 *ReadGRAYImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| const unsigned char |
| *pixels; |
| |
| Image |
| *canvas_image, |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| scene; |
| |
| QuantumInfo |
| *quantum_info; |
| |
| QuantumType |
| quantum_type; |
| |
| size_t |
| length; |
| |
| ssize_t |
| count, |
| 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); |
| if ((image->columns == 0) || (image->rows == 0)) |
| ThrowReaderException(OptionError,"MustSpecifyImageSize"); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| if (DiscardBlobBytes(image,(size_t) image->offset) == MagickFalse) |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| /* |
| Create virtual canvas to support cropping (i.e. image.gray[100x100+10+20]). |
| */ |
| SetImageColorspace(image,GRAYColorspace,exception); |
| canvas_image=CloneImage(image,image->extract_info.width,1,MagickFalse, |
| exception); |
| (void) SetImageVirtualPixelMethod(canvas_image,BlackVirtualPixelMethod, |
| exception); |
| quantum_type=GrayQuantum; |
| quantum_info=AcquireQuantumInfo(image_info,canvas_image); |
| if (quantum_info == (QuantumInfo *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| pixels=(const unsigned char *) NULL; |
| if (image_info->number_scenes != 0) |
| while (image->scene < image_info->scene) |
| { |
| /* |
| Skip to next image. |
| */ |
| image->scene++; |
| length=GetQuantumExtent(canvas_image,quantum_info,quantum_type); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| pixels=(const unsigned char *) ReadBlobStream(image,length, |
| GetQuantumPixels(quantum_info),&count); |
| if (count != (ssize_t) length) |
| break; |
| } |
| } |
| scene=0; |
| count=0; |
| length=0; |
| do |
| { |
| /* |
| Read pixels to virtual canvas image then push to image. |
| */ |
| 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)); |
| SetImageColorspace(image,GRAYColorspace,exception); |
| if (scene == 0) |
| { |
| length=GetQuantumExtent(canvas_image,quantum_info,quantum_type); |
| pixels=(const unsigned char *) ReadBlobStream(image,length, |
| GetQuantumPixels(quantum_info),&count); |
| } |
| for (y=0; y < (ssize_t) image->extract_info.height; y++) |
| { |
| register const Quantum |
| *magick_restrict p; |
| |
| register ssize_t |
| x; |
| |
| register Quantum |
| *magick_restrict q; |
| |
| if (count != (ssize_t) length) |
| { |
| ThrowFileException(exception,CorruptImageError, |
| "UnexpectedEndOfFile",image->filename); |
| break; |
| } |
| q=GetAuthenticPixels(canvas_image,0,0,canvas_image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| length=ImportQuantumPixels(canvas_image,(CacheView *) NULL,quantum_info, |
| quantum_type,pixels,exception); |
| if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse) |
| break; |
| if (((y-image->extract_info.y) >= 0) && |
| ((y-image->extract_info.y) < (ssize_t) image->rows)) |
| { |
| p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0, |
| image->columns,1,exception); |
| q=QueueAuthenticPixels(image,0,y-image->extract_info.y,image->columns, |
| 1,exception); |
| if ((p == (const Quantum *) NULL) || |
| (q == (Quantum *) NULL)) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| SetPixelGray(image,GetPixelGray(canvas_image,p),q); |
| p+=GetPixelChannels(canvas_image); |
| 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; |
| } |
| pixels=(const unsigned char *) ReadBlobStream(image,length, |
| GetQuantumPixels(quantum_info),&count); |
| } |
| SetQuantumImageType(image,quantum_type); |
| /* |
| Proceed to next image. |
| */ |
| if (image_info->number_scenes != 0) |
| if (image->scene >= (image_info->scene+image_info->number_scenes-1)) |
| break; |
| if (count == (ssize_t) length) |
| { |
| /* |
| 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; |
| } |
| scene++; |
| } while (count == (ssize_t) length); |
| quantum_info=DestroyQuantumInfo(quantum_info); |
| canvas_image=DestroyImage(canvas_image); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r G R A Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterGRAYImage() adds attributes for the GRAY 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 RegisterGRAYImage method is: |
| % |
| % size_t RegisterGRAYImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterGRAYImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("GRAY","GRAY","Raw gray samples"); |
| entry->decoder=(DecodeImageHandler *) ReadGRAYImage; |
| entry->encoder=(EncodeImageHandler *) WriteGRAYImage; |
| entry->flags|=CoderRawSupportFlag; |
| entry->flags|=CoderEndianSupportFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r G R A Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterGRAYImage() removes format registrations made by the |
| % GRAY module from the list of supported formats. |
| % |
| % The format of the UnregisterGRAYImage method is: |
| % |
| % UnregisterGRAYImage(void) |
| % |
| */ |
| ModuleExport void UnregisterGRAYImage(void) |
| { |
| (void) UnregisterMagickInfo("GRAY"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e G R A Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WriteGRAYImage() writes an image to a file as gray scale intensity |
| % values. |
| % |
| % The format of the WriteGRAYImage method is: |
| % |
| % MagickBooleanType WriteGRAYImage(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 WriteGRAYImage(const ImageInfo *image_info, |
| Image *image,ExceptionInfo *exception) |
| { |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| scene; |
| |
| QuantumInfo |
| *quantum_info; |
| |
| QuantumType |
| quantum_type; |
| |
| size_t |
| length; |
| |
| ssize_t |
| count, |
| y; |
| |
| unsigned char |
| *pixels; |
| |
| /* |
| 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); |
| scene=0; |
| do |
| { |
| /* |
| Write grayscale pixels. |
| */ |
| (void) TransformImageColorspace(image,sRGBColorspace,exception); |
| quantum_type=GrayQuantum; |
| quantum_info=AcquireQuantumInfo(image_info,image); |
| if (quantum_info == (QuantumInfo *) NULL) |
| ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| pixels=(unsigned char *) GetQuantumPixels(quantum_info); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register const Quantum |
| *magick_restrict p; |
| |
| p=GetVirtualPixels(image,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| break; |
| length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info, |
| quantum_type,pixels,exception); |
| count=WriteBlob(image,length,pixels); |
| if (count != (ssize_t) length) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| quantum_info=DestroyQuantumInfo(quantum_info); |
| if (GetNextImageInList(image) == (Image *) NULL) |
| break; |
| image=SyncNextImageInList(image); |
| status=SetImageProgress(image,SaveImagesTag,scene++, |
| GetImageListLength(image)); |
| if (status == MagickFalse) |
| break; |
| } while (image_info->adjoin != MagickFalse); |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |