/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % EEEEE X X RRRR % % E X X R R % % EEE X RRRR % % E X X R R % % EEEEE X X R R % % % % % % Read/Write High Dynamic-Range (HDR) Image File Format. % % % % Software Design % % John Cristy % % April 2007 % % % % % % Copyright 1999-2007 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 "magick/studio.h" #include "magick/blob.h" #include "magick/blob-private.h" #include "magick/exception.h" #include "magick/exception-private.h" #include "magick/image.h" #include "magick/image-private.h" #include "magick/list.h" #include "magick/magick.h" #include "magick/memory_.h" #include "magick/property.h" #include "magick/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/module.h" #include "magick/resource_.h" #include "magick/utility.h" #if defined(HasOPENEXR) #include /* Forward declarations. */ static MagickBooleanType WriteEXRImage(const ImageInfo *,Image *); #endif /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % I s E X R % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % IsEXR() returns MagickTrue if the image format type, identified by the % magick string, is EXR. % % The format of the IsEXR method is: % % MagickBooleanType IsEXR(const unsigned char *magick,const size_t length) % % A description of each parameter follows: % % o magick: This string is generally the first few bytes of an image file % or blob. % % o length: Specifies the length of the magick string. % */ static MagickBooleanType IsEXR(const unsigned char *magick,const size_t length) { if (length < 4) return(MagickFalse); if (memcmp(magick,"\166\057\061\001",4) == 0) return(MagickTrue); return(MagickFalse); } #if defined(HasOPENEXR) /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d E X R I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadEXRImage reads an image in the high dynamic-range (HDR) file format % developed by Industrial Light & Magic. It allocates the memory necessary % for the new Image structure and returns a pointer to the new image. % % The format of the ReadEXRImage method is: % % Image *ReadEXRImage(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 *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception) { const ImfHeader *hdr_info; Image *image; ImageInfo *read_info; ImfInputFile *file; ImfRgba *scanline; int max_x, max_y, min_x, min_y; long y; register long x; register PixelPacket *q; MagickBooleanType status; /* Open image. */ 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=AllocateImage(image_info); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } read_info=CloneImageInfo(image_info); if (IsAccessible(read_info->filename) == MagickFalse) { (void) AcquireUniqueFilename(read_info->filename); (void) ImageToFile(image,read_info->filename,exception); } file=ImfOpenInputFile(read_info->filename); if (file == (ImfInputFile *) NULL) { ThrowFileException(exception,BlobError,"UnableToOpenBlob", ImfErrorMessage()); read_info=DestroyImageInfo(read_info); return((Image *) NULL); } hdr_info=ImfInputHeader(file); ImfHeaderDataWindow(hdr_info,&min_x,&min_y,&max_x,&max_y); image->columns=max_x-min_x+1UL; image->rows=max_y-min_y+1UL; image->matte=MagickTrue; if (image_info->ping != MagickFalse) { (void) ImfCloseInputFile(file); if (LocaleCompare(image_info->filename,read_info->filename) != 0) (void) RelinquishUniqueFileResource(read_info->filename); read_info=DestroyImageInfo(read_info); CloseBlob(image); return(GetFirstImageInList(image)); } if (SetImageExtent(image,0,0) == MagickFalse) { (void) ImfCloseInputFile(file); if (LocaleCompare(image_info->filename,read_info->filename) != 0) (void) RelinquishUniqueFileResource(read_info->filename); read_info=DestroyImageInfo(read_info); InheritException(exception,&image->exception); return(DestroyImageList(image)); } scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline)); if (scanline == (ImfRgba *) NULL) { (void) ImfCloseInputFile(file); ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); } for (y=0; y < (long) image->rows; y++) { q=SetImagePixels(image,0,y,image->columns,1); if (q == (PixelPacket *) NULL) break; ImfInputSetFrameBuffer(file,scanline-min_x-image->columns*(min_y+y),1, image->columns); ImfInputReadPixels(file,min_y+y,min_y+y); for (x=0; x < (long) image->columns; x++) { q->red=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat( scanline[x].r)); q->green=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat( scanline[x].g)); q->blue=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat( scanline[x].b)); q->opacity=RoundToQuantum((MagickRealType) QuantumRange-QuantumRange* ImfHalfToFloat(scanline[x].a)); q++; } if (SyncImagePixels(image) == MagickFalse) break; } scanline=(ImfRgba *) RelinquishMagickMemory(scanline); (void) ImfCloseInputFile(file); if (LocaleCompare(image_info->filename,read_info->filename) != 0) (void) RelinquishUniqueFileResource(read_info->filename); read_info=DestroyImageInfo(read_info); CloseBlob(image); return(GetFirstImageInList(image)); } #endif /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r E X R I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterEXRImage() adds properties for the EXR image format % to the list of supported formats. The properties 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 RegisterEXRImage method is: % % unsigned long RegisterEXRImage(void) % */ ModuleExport unsigned long RegisterEXRImage(void) { MagickInfo *entry; entry=SetMagickInfo("EXR"); #if defined(HasOPENEXR) entry->decoder=(DecodeImageHandler *) ReadEXRImage; entry->encoder=(EncodeImageHandler *) WriteEXRImage; #endif entry->magick=(IsImageFormatHandler *) IsEXR; entry->description=ConstantString("High Dynamic-range (HDR)"); entry->module=ConstantString("EXR"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r E X R I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterEXRImage() removes format registrations made by the % EXR module from the list of supported formats. % % The format of the UnregisterEXRImage method is: % % UnregisterEXRImage(void) % */ ModuleExport void UnregisterEXRImage(void) { (void) UnregisterMagickInfo("EXR"); } #if defined(HasOPENEXR) /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e E X R I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteEXRImage() writes an image to a file the in the high dynamic-range % (HDR) file format developed by Industrial Light & Magic. % % The format of the WriteEXRImage method is: % % MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image) % % A description of each parameter follows. % % o image_info: The image info. % % o image: The image. % */ static MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image) { ImageInfo *write_info; ImfHalf half_quantum; ImfHeader *hdr_info; ImfOutputFile *file; ImfRgba *scanline; long y; MagickBooleanType status; register const PixelPacket *p; register long x; /* 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); status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception); if (status == MagickFalse) return(status); write_info=CloneImageInfo(image_info); if (IsAccessible(write_info->filename) == MagickFalse) (void) AcquireUniqueFilename(write_info->filename); hdr_info=ImfNewHeader(); ImfHeaderSetDataWindow(hdr_info,0,0,(int) image->columns-1,(int) image->rows-1); ImfHeaderSetDisplayWindow(hdr_info,0,0,(int) image->columns-1,(int) image->rows-1); ImfHeaderSetCompression(hdr_info,write_info->compression == NoCompression ? IMF_NO_COMPRESSION : IMF_PIZ_COMPRESSION); ImfHeaderSetLineOrder(hdr_info,IMF_INCREASING_Y); file=ImfOpenOutputFile(write_info->filename,hdr_info,IMF_WRITE_RGBA); ImfDeleteHeader(hdr_info); if (file == (ImfOutputFile *) NULL) { ThrowFileException(&image->exception,BlobError,"UnableToOpenBlob", ImfErrorMessage()); write_info=DestroyImageInfo(write_info); return(MagickFalse); } scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline)); if (scanline == (ImfRgba *) NULL) { (void) ImfCloseOutputFile(file); ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); } for (y=0; y < (long) image->rows; y++) { p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception); if (p == (const PixelPacket *) NULL) break; for (x=0; x < (long) image->columns; x++) { ImfFloatToHalf(QuantumScale*p->red,&half_quantum); scanline[x].r=half_quantum; ImfFloatToHalf(QuantumScale*p->green,&half_quantum); scanline[x].g=half_quantum; ImfFloatToHalf(QuantumScale*p->blue,&half_quantum); scanline[x].b=half_quantum; if (image->matte == MagickFalse) ImfFloatToHalf(1.0,&half_quantum); else ImfFloatToHalf(1.0-QuantumScale*p->opacity,&half_quantum); scanline[x].a=half_quantum; p++; } ImfOutputSetFrameBuffer(file,scanline-(y*image->columns),1,image->columns); ImfOutputWritePixels(file,1); } (void) ImfCloseOutputFile(file); scanline=(ImfRgba *) RelinquishMagickMemory(scanline); if (LocaleCompare(image_info->filename,write_info->filename) != 0) { (void) FileToImage(image,write_info->filename); (void) RelinquishUniqueFileResource(write_info->filename); } write_info=DestroyImageInfo(write_info); CloseBlob(image); return(MagickTrue); } #endif