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|
/*
% Copyright (C) 2003-2020 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
% Copyright 1991-1999 E. I. du Pont de Nemours and Company
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% EEEEE PPPP TTTTT %
% E P P T %
% EEE PPPP T %
% E P T %
% EEEEE P T %
% %
% %
% Read/Write Encapsulated Postscript Format (with preview). %
% %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/constitute.h"
#include "magick/delegate.h"
#include "magick/log.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/render.h"
#include "magick/tempfile.h"
#include "magick/utility.h"
/*
Forward declarations.
*/
static unsigned int
WriteEPTImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s E P T %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method IsEPT returns True if the image format type, identified by the
% magick string, is EPT.
%
% The format of the IsEPT method is:
%
% unsigned int IsEPT(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o status: Method IsEPT returns True if the image format type is EPT.
%
% 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 unsigned int IsEPT(const unsigned char *magick,const size_t length)
{
if (length < 4)
return(False);
if (memcmp(magick,"\305\320\323\306",4) == 0)
return(True);
return(False);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method ReadEPTImage reads a binary Adobe Postscript 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 ReadEPTImage method is:
%
% Image *ReadEPTImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadEPTImage returns a pointer to the image after
% reading. A null image is returned if there is a memory shortage or
% if the image cannot be read.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
#if defined(HasGS)
static Image *ReadEPTImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
#define BoundingBox "%%BoundingBox:"
#define DocumentMedia "%%DocumentMedia:"
#define PageBoundingBox "%%PageBoundingBox:"
#define PostscriptLevel "%!PS-"
#define RenderPostscriptText "[%s] Rendering postscript..."
char
density[MaxTextExtent],
command[MaxTextExtent],
filename[MaxTextExtent],
geometry[MaxTextExtent],
postscript_filename[MaxTextExtent],
translate_geometry[MaxTextExtent];
const DelegateInfo
*delegate_info;
double
dx_resolution,
dy_resolution;
FILE
*file;
Image
*image,
*next_image;
int
c,
status;
unsigned int
antialias=4;
magick_uint32_t
filesize;
RectangleInfo
box,
page;
register char
*p;
register size_t
i;
SegmentInfo
bounds;
magick_uint32_t
count;
unsigned long
height,
width;
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
/*
Select Postscript delegate driver
*/
delegate_info=GetPostscriptDelegateInfo(image_info,&antialias,exception);
if (delegate_info == (const DelegateInfo *) NULL)
return((Image *) NULL);
/*
Open image file.
*/
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == False)
ThrowReaderException(FileOpenError,UnableToOpenFile,image);
/*
Set the page geometry.
*/
dx_resolution=72.0;
dy_resolution=72.0;
if ((image->x_resolution == 0.0) || (image->y_resolution == 0.0))
{
(void) strlcpy(density,PSDensityGeometry,sizeof(density));
count=GetMagickDimension(density,&image->x_resolution,
&image->y_resolution,NULL,NULL);
if (count != 2)
image->y_resolution=image->x_resolution;
}
FormatString(density,"%gx%g",image->x_resolution,image->y_resolution);
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Density: %s", density);
SetGeometry(image,&page);
page.width=612;
page.height=792;
(void) GetGeometry(PSPageGeometry,&page.x,&page.y,&page.width,&page.height);
/*
Determine page geometry from the Postscript bounding box.
*/
(void) ReadBlobLSBLong(image);
count=ReadBlobLSBLong(image);
filesize=ReadBlobLSBLong(image);
if (EOFBlob(image))
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"File Size: %u, Offset: %u",
(unsigned int) filesize, (unsigned int) count);
if ((count <= 12) || (filesize == 0))
ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
for (i=0; i < (count-12); i++)
if (ReadBlobByte(image) == EOF)
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
/*
Open temporary output file.
*/
file=AcquireTemporaryFileStream(postscript_filename,BinaryFileIOMode);
if (file == (FILE *) NULL)
ThrowReaderTemporaryFileException(postscript_filename);
FormatString(translate_geometry,"%g %g translate\n ",0.0,0.0);
(void) fputs(translate_geometry,file);
/*
Copy Postscript to temporary file.
*/
box.width=0;
box.height=0;
p=command;
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Copying Postscript to temporary file \"%s\" ...",
postscript_filename);
for (i=0; i < filesize; i++)
{
if ((c=ReadBlobByte(image)) == EOF)
break;
(void) fputc(c,file);
*p++=c;
if ((c != '\n') && (c != '\r') && ((p-command) < (MaxTextExtent-1)))
continue;
*p='\0';
p=command;
/*
Parse a bounding box statement.
*/
count=0;
if (LocaleNCompare(BoundingBox,command,strlen(BoundingBox)) == 0)
count=sscanf(command,"%%%%BoundingBox: %lf %lf %lf %lf",&bounds.x1,
&bounds.y1,&bounds.x2,&bounds.y2);
if (LocaleNCompare(DocumentMedia,command,strlen(DocumentMedia)) == 0)
count=sscanf(command,"%%%%DocumentMedia: %*s %lf %lf",&bounds.x2,
&bounds.y2)+2;
if (LocaleNCompare(PageBoundingBox,command,strlen(PageBoundingBox)) == 0)
count=sscanf(command,"%%%%PageBoundingBox: %lf %lf %lf %lf",
&bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
if (count != 4)
continue;
if ((bounds.x1 > bounds.x2) ||
(bounds.y1 > bounds.y2))
continue;
/*
Set Postscript render geometry.
*/
FormatString(translate_geometry,"%g %g translate\n",-bounds.x1,-bounds.y1);
width=(unsigned long) (bounds.x2-bounds.x1+0.5);
height=(unsigned long) (bounds.y2-bounds.y1+0.5);
if ((width <= box.width) && (height <= box.height))
continue;
page.width=width;
page.height=height;
box=page;
}
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Done copying.");
if (image_info->page != (char *) NULL)
(void) GetGeometry(image_info->page,&page.x,&page.y,&page.width,
&page.height);
FormatString(geometry,"%lux%lu",
(unsigned long) ceil(page.width*image->x_resolution/dx_resolution-0.5),
(unsigned long) ceil(page.height*image->y_resolution/dy_resolution-0.5));
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Page geometry: %s",geometry);
if (ferror(file))
{
(void) fclose(file);
(void) LiberateTemporaryFile(postscript_filename);
ThrowReaderException(CorruptImageError,AnErrorHasOccurredWritingToFile,
image)
}
(void) rewind(file);
(void) fputs(translate_geometry,file);
(void) fclose(file);
CloseBlob(image);
filesize=GetBlobSize(image);
DestroyImage(image);
image=(Image *) NULL;
/*
Use Ghostscript to convert Postscript image.
*/
{
char
options[MaxTextExtent];
options[0]='\0';
/*
Append subrange.
*/
if (image_info->subrange != 0)
FormatString(options,"-dFirstPage=%lu -dLastPage=%lu",
image_info->subimage+1,image_info->subimage+image_info->subrange);
/*
Append bounding box.
*/
FormatString(options+strlen(options)," -g%s",geometry);
(void) strlcpy(filename,image_info->filename,MaxTextExtent);
if (image_info->temporary)
(void) LiberateTemporaryFile((char *) image_info->filename);
if(!AcquireTemporaryFileName((char *)image_info->filename))
{
(void) LiberateTemporaryFile(postscript_filename);
ThrowReaderTemporaryFileException(image_info->filename);
}
FormatString(command,delegate_info->commands,antialias,
antialias,density,options,image_info->filename,
postscript_filename);
}
(void) MagickMonitorFormatted(0,8,exception,RenderPostscriptText,
image_info->filename);
status=InvokePostscriptDelegate(image_info->verbose,command,exception);
if (!IsAccessibleAndNotEmpty(image_info->filename))
{
/*
Ghostscript requires a showpage operator.
*/
file=fopen(postscript_filename,"ab");
if (file == (FILE *) NULL)
{
(void) LiberateTemporaryFile((char *) image_info->filename);
ThrowReaderException(FileOpenError,UnableToWriteFile,image);
}
(void) fputs("showpage\n",file);
(void) fclose(file);
status=InvokePostscriptDelegate(image_info->verbose,command,exception);
}
(void) LiberateTemporaryFile(postscript_filename);
(void) MagickMonitorFormatted(7,8,exception,RenderPostscriptText,
image_info->filename);
if (IsAccessibleAndNotEmpty(image_info->filename))
{
/*
Read Ghostscript output.
*/
ImageInfo
*clone_info;
clone_info=CloneImageInfo(image_info);
clone_info->blob=(void *) NULL;
clone_info->length=0;
clone_info->magick[0]='\0';
image=ReadImage(clone_info,exception);
DestroyImageInfo(clone_info);
}
(void) LiberateTemporaryFile((char *) image_info->filename);
if (image == (Image *) NULL)
if (UndefinedException == exception->severity)
ThrowException(exception,DelegateError,PostscriptDelegateFailed,filename);
if (image != (Image *) NULL)
{
do
{
(void) strcpy(image->magick,"PS");
(void) strlcpy(image->filename,filename,MaxTextExtent);
next_image=SyncNextImageInList(image);
if (next_image != (Image *) NULL)
image=next_image;
} while (next_image != (Image *) NULL);
while (image->previous != (Image *) NULL)
image=image->previous;
}
return(image);
}
#endif /* if defined(HasGS) */
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method RegisterEPTImage adds attributes for the EPT 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 RegisterEPTImage method is:
%
% RegisterEPTImage(void)
%
*/
ModuleExport void RegisterEPTImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("EPT");
#if defined(HasGS)
entry->decoder=(DecoderHandler) ReadEPTImage;
#endif /* if defined(HasGS) */
entry->encoder=(EncoderHandler) WriteEPTImage;
entry->magick=(MagickHandler) IsEPT;
entry->adjoin=False;
entry->blob_support=MagickFalse;
entry->description="Adobe Encapsulated PostScript with MS-DOS TIFF preview";
entry->module="EPT";
entry->coder_class=PrimaryCoderClass;
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("EPT2");
#if defined(HasGS)
entry->decoder=(DecoderHandler) ReadEPTImage;
#endif /* if defined(HasGS) */
entry->encoder=(EncoderHandler) WriteEPTImage;
entry->magick=(MagickHandler) IsEPT;
entry->adjoin=False;
entry->blob_support=MagickFalse;
entry->description="Adobe Level II Encapsulated PostScript with MS-DOS TIFF preview";
entry->module="EPT";
entry->coder_class=PrimaryCoderClass;
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("EPT3");
#if defined(HasGS)
entry->decoder=(DecoderHandler) ReadEPTImage;
#endif /* if defined(HasGS) */
entry->encoder=(EncoderHandler) WriteEPTImage;
entry->magick=(MagickHandler) IsEPT;
entry->adjoin=False;
entry->blob_support=MagickFalse;
entry->description="Adobe Level III Encapsulated PostScript with MS-DOS TIFF preview";
entry->module="EPT";
entry->coder_class=PrimaryCoderClass;
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method UnregisterEPTImage removes format registrations made by the
% EPT module from the list of supported formats.
%
% The format of the UnregisterEPTImage method is:
%
% UnregisterEPTImage(void)
%
*/
ModuleExport void UnregisterEPTImage(void)
{
(void) UnregisterMagickInfo("EPT");
(void) UnregisterMagickInfo("EPT2");
(void) UnregisterMagickInfo("EPT3");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method WriteEPTImage writes an image in the Adobe Encapsulated Postscript
% format with a TIFF preview.
%
% The format of the WriteEPTImage method is:
%
% unsigned int WriteEPTImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Method WriteEPTImage return True if the image is written.
% False is returned is there is a memory shortage or if the image file
% fails to write.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o image: A pointer to an Image structure.
%
%
*/
static unsigned int WriteEPTImage(const ImageInfo *image_info,Image *image)
{
char
filename[MaxTextExtent],
ps_filename[MaxTextExtent],
tiff_filename[MaxTextExtent];
FILE
*ps_file,
*tiff_file;
unsigned int
logging,
status;
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
logging=IsEventLogging();
(void) strlcpy(filename,image->filename,MaxTextExtent);
(void) strlcpy(ps_filename,image->magick_filename,MaxTextExtent);
if (LocaleCompare(image_info->magick,"EPS") != 0)
{
/*
Write image as Encapsulated Postscript to a temporary file.
*/
char
subformat[MaxTextExtent];
if(!AcquireTemporaryFileName(ps_filename))
ThrowWriterTemporaryFileException(ps_filename);
/* Select desired EPS level */
(void) strcpy(subformat,"eps");
if (LocaleCompare(image_info->magick,"EPT2") == 0)
(void) strcpy(subformat,"eps2");
else if (LocaleCompare(image_info->magick,"EPT3") == 0)
(void) strcpy(subformat,"eps3");
/* JPEG compression requires at least EPS2 */
if ((image->compression == JPEGCompression) &&
(LocaleCompare(subformat,"EPS") == 0))
(void) strcpy(subformat,"eps2");
FormatString(image->filename,"%s:%.1024s",subformat,ps_filename);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Writing temporary EPS file \"%s\"",ps_filename);
(void) WriteImage(image_info,image);
}
/*
Write image as TIFF to a temporary file.
*/
if(!AcquireTemporaryFileName(tiff_filename))
{
(void) LiberateTemporaryFile(ps_filename);
ThrowWriterTemporaryFileException(tiff_filename);
}
FormatString(image->filename,"tiff:%.1024s",tiff_filename);
image->compression=RLECompression;
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Writing temporary TIFF preview file \"%s\"",tiff_filename);
(void) WriteImage(image_info,image);
/*
Write EPT image.
*/
(void) strlcpy(image->filename,filename,MaxTextExtent);
status=MagickFail;
if (OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception) != MagickFail)
{
if ((ps_file=fopen(ps_filename,"rb")) != (FILE *) NULL)
{
if ((tiff_file=fopen(tiff_filename,"rb")) != (FILE *) NULL)
{
int
c;
struct stat
attributes;
/*
Write EPT image.
*/
/* MS-DOS EPS binary file magic signature */
(void) WriteBlobLSBLong(image,0xc6d3d0c5ul);
/* Byte position in file for start of Postscript language code
section */
(void) WriteBlobLSBLong(image,30);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"EPS section offset is %lu bytes",(unsigned long) 30);
/* Byte length of PostScript language section. */
attributes.st_size=0;
(void) fstat(fileno(ps_file),&attributes);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"EPS section is %lu bytes long",
(unsigned long)attributes.st_size);
(void) WriteBlobLSBLong(image,(unsigned long) attributes.st_size);
/* Byte position in file for start of Metafile screen
representation (none provided). */
(void) WriteBlobLSBLong(image,0);
/* Byte length of Metafile section (PSize). (none provided) */
(void) WriteBlobLSBLong(image,0);
/* Byte position of TIFF representation. */
(void) WriteBlobLSBLong(image,(unsigned long) attributes.st_size+30);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"TIFF section offset is %lu bytes",
(unsigned long) attributes.st_size+30);
/* Byte length of TIFF section. */
(void) fstat(fileno(tiff_file),&attributes);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"TIFF section is %lu bytes long",
(unsigned long) attributes.st_size);
(void) WriteBlobLSBLong(image,(long) attributes.st_size);
/* Checksum of header (XOR of bytes 0-27). If Checksum is FFFF
then ignore it. This is lazy code. */
(void) WriteBlobLSBShort(image,0xffff);
/* EPS section */
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Writing EPS section at offset %ld",
(long) TellBlob(image));
for (c=fgetc(ps_file); c != EOF; c=fgetc(ps_file))
(void) WriteBlobByte(image,c);
/* TIFF section */
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Writing TIFF section at offset %ld",
(long) TellBlob(image));
for (c=fgetc(tiff_file); c != EOF; c=fgetc(tiff_file))
(void) WriteBlobByte(image,c);
(void) fclose(tiff_file);
status=MagickPass;
}
else
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Failed to open \"%s\" for read",
tiff_filename);
}
(void) fclose(ps_file);
}
else
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Failed to open \"%s\" for read",ps_filename);
}
CloseBlob(image);
}
else
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Failed to open \"%s\" for write",
image->filename);
}
if (LocaleCompare(image_info->magick,"EPS") != 0)
(void) LiberateTemporaryFile(ps_filename);
(void) LiberateTemporaryFile(tiff_filename);
if (status == MagickFail)
ThrowWriterException(FileOpenError,UnableToOpenFile,image);
return(MagickPass);
}
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