/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- IsTXT
- ReadTEXTImage
- ReadTXTImage
- RegisterTXTImage
- UnregisterTXTImage
- WriteTXTImage
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% TTTTT X X TTTTT %
% T X X T %
% T X T %
% T X X T %
% T X X T %
% %
% %
% Render Text Onto A Canvas Image. %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2011 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/annotate.h"
#include "magick/attribute.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/cache.h"
#include "magick/color.h"
#include "magick/color-private.h"
#include "magick/colorspace.h"
#include "magick/constitute.h"
#include "magick/draw.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/geometry.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/monitor-private.h"
#include "magick/option.h"
#include "magick/pixel-private.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/statistic.h"
#include "magick/string_.h"
#include "magick/module.h"
/*
Forward declarations.
*/
static MagickBooleanType
WriteTXTImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s T X T %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsTXT() returns MagickTrue if the image format type, identified by the magick
% string, is TXT.
%
% The format of the IsTXT method is:
%
% MagickBooleanType IsTXT(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: compare image format pattern against these bytes.
%
% o length: Specifies the length of the magick string.
%
*/
static MagickBooleanType IsTXT(const unsigned char *magick,const size_t length)
{
#define MagickID "# ImageMagick pixel enumeration:"
char
colorspace[MaxTextExtent];
ssize_t
count;
unsigned long
columns,
depth,
rows;
if (length < 40)
return(MagickFalse);
if (LocaleNCompare((const char *) magick,MagickID,strlen(MagickID)) != 0)
return(MagickFalse);
count=(ssize_t) sscanf((const char *) magick+32,"%lu,%lu,%lu,%s",&columns,
&rows,&depth,colorspace);
if (count != 4)
return(MagickFalse);
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d T E X T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadTEXTImage() reads a text file and returns it as an image. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadTEXTImage method is:
%
% Image *ReadTEXTImage(const ImageInfo *image_info,Image *image,
% char *text,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o image: the image.
%
% o text: the text storage buffer.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadTEXTImage(const ImageInfo *image_info,Image *image,
char *text,ExceptionInfo *exception)
{
char
filename[MaxTextExtent],
geometry[MaxTextExtent],
*p;
DrawInfo
*draw_info;
Image
*texture;
ssize_t
offset;
MagickBooleanType
status;
PointInfo
delta;
RectangleInfo
page;
TypeMetric
metrics;
/*
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);
/*
Set the page geometry.
*/
delta.x=DefaultResolution;
delta.y=DefaultResolution;
if ((image->x_resolution == 0.0) || (image->y_resolution == 0.0))
{
GeometryInfo
geometry_info;
MagickStatusType
flags;
flags=ParseGeometry(PSDensityGeometry,&geometry_info);
image->x_resolution=geometry_info.rho;
image->y_resolution=geometry_info.sigma;
if ((flags & SigmaValue) == 0)
image->y_resolution=image->x_resolution;
}
page.width=612;
page.height=792;
page.x=43;
page.y=43;
if (image_info->page != (char *) NULL)
(void) ParseAbsoluteGeometry(image_info->page,&page);
/*
Initialize Image structure.
*/
image->columns=(size_t) floor((((double) page.width*
image->x_resolution)/delta.x)+0.5);
image->rows=(size_t) floor((((double) page.height*
image->y_resolution)/delta.y)+0.5);
image->page.x=0;
image->page.y=0;
texture=(Image *) NULL;
if (image_info->texture != (char *) NULL)
{
ImageInfo
*read_info;
read_info=CloneImageInfo(image_info);
SetImageInfoBlob(read_info,(void *) NULL,0);
(void) CopyMagickString(read_info->filename,image_info->texture,
MaxTextExtent);
texture=ReadImage(read_info,exception);
read_info=DestroyImageInfo(read_info);
}
/*
Annotate the text image.
*/
(void) SetImageBackgroundColor(image);
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
(void) CloneString(&draw_info->text,image_info->filename);
(void) FormatMagickString(geometry,MaxTextExtent,"0x0%+ld%+ld",(long) page.x,
(long) page.y);
(void) CloneString(&draw_info->geometry,geometry);
status=GetTypeMetrics(image,draw_info,&metrics);
if (status == MagickFalse)
ThrowReaderException(TypeError,"UnableToGetTypeMetrics");
page.y=(ssize_t) ceil((double) page.y+metrics.ascent-0.5);
(void) FormatMagickString(geometry,MaxTextExtent,"0x0%+ld%+ld",(long) page.x,
(long) page.y);
(void) CloneString(&draw_info->geometry,geometry);
(void) CopyMagickString(filename,image_info->filename,MaxTextExtent);
if (*draw_info->text != '\0')
*draw_info->text='\0';
p=text;
for (offset=2*page.y; p != (char *) NULL; )
{
/*
Annotate image with text.
*/
(void) ConcatenateString(&draw_info->text,text);
(void) ConcatenateString(&draw_info->text,"\n");
offset+=(ssize_t) (metrics.ascent-metrics.descent);
if (image->previous == (Image *) NULL)
{
status=SetImageProgress(image,LoadImageTag,offset,image->rows);
if (status == MagickFalse)
break;
}
p=ReadBlobString(image,text);
if ((offset < (ssize_t) image->rows) && (p != (char *) NULL))
continue;
if (texture != (Image *) NULL)
{
MagickProgressMonitor
progress_monitor;
progress_monitor=SetImageProgressMonitor(image,
(MagickProgressMonitor) NULL,image->client_data);
(void) TextureImage(image,texture);
(void) SetImageProgressMonitor(image,progress_monitor,
image->client_data);
}
(void) AnnotateImage(image,draw_info);
if (p == (char *) NULL)
break;
/*
Page is full-- allocate next image structure.
*/
*draw_info->text='\0';
offset=2*page.y;
AcquireNextImage(image_info,image);
if (GetNextImageInList(image) == (Image *) NULL)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
image->next->columns=image->columns;
image->next->rows=image->rows;
image=SyncNextImageInList(image);
(void) CopyMagickString(image->filename,filename,MaxTextExtent);
(void) SetImageBackgroundColor(image);
status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
GetBlobSize(image));
if (status == MagickFalse)
break;
}
if (texture != (Image *) NULL)
{
MagickProgressMonitor
progress_monitor;
progress_monitor=SetImageProgressMonitor(image,
(MagickProgressMonitor) NULL,image->client_data);
(void) TextureImage(image,texture);
(void) SetImageProgressMonitor(image,progress_monitor,image->client_data);
}
(void) AnnotateImage(image,draw_info);
if (texture != (Image *) NULL)
texture=DestroyImage(texture);
draw_info=DestroyDrawInfo(draw_info);
(void) CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d T X T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadTXTImage() reads a text file and returns it as an image. It allocates
% the memory necessary for the new Image structure and returns a pointer to
% the new image.
%
% The format of the ReadTXTImage method is:
%
% Image *ReadTXTImage(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 *ReadTXTImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
char
colorspace[MaxTextExtent],
text[MaxTextExtent];
Image
*image;
IndexPacket
*indexes;
long
type,
x_offset,
y,
y_offset;
LongPixelPacket
pixel;
MagickBooleanType
status;
QuantumAny
range;
register ssize_t
i,
x;
register PixelPacket
*q;
ssize_t
count;
unsigned long
depth,
height,
max_value,
width;
/*
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);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
(void) ResetMagickMemory(text,0,sizeof(text));
(void) ReadBlobString(image,text);
if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) != 0)
return(ReadTEXTImage(image_info,image,text,exception));
do
{
*colorspace='\0';
count=(ssize_t) sscanf(text+32,"%lu,%lu,%lu,%s",&width,&height,&max_value,
colorspace);
if (count != 4)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
image->columns=width;
image->rows=height;
for (depth=1; (GetQuantumRange(depth)+1) < max_value; depth++) ;
image->depth=depth;
LocaleLower(colorspace);
i=(ssize_t) strlen(colorspace)-1;
image->matte=MagickFalse;
if ((i > 0) && (colorspace[i] == 'a'))
{
colorspace[i]='\0';
image->matte=MagickTrue;
}
type=ParseMagickOption(MagickColorspaceOptions,MagickFalse,colorspace);
if (type < 0)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
image->colorspace=(ColorspaceType) type;
(void) ResetMagickMemory(&pixel,0,sizeof(pixel));
(void) SetImageBackgroundColor(image);
range=GetQuantumRange(image->depth);
for (y=0; y < (ssize_t) image->rows; y++)
{
for (x=0; x < (ssize_t) image->columns; x++)
{
if (ReadBlobString(image,text) == (char *) NULL)
break;
if (image->colorspace == CMYKColorspace)
{
if (image->matte != MagickFalse)
count=(ssize_t) sscanf(text,"%ld,%ld: (%u,%u,%u,%u,%u",&x_offset,
&y_offset,&pixel.red,&pixel.green,&pixel.blue,&pixel.index,
&pixel.opacity);
else
count=(ssize_t) sscanf(text,"%ld,%ld: (%u,%u,%u,%u",&x_offset,
&y_offset,&pixel.red,&pixel.green,&pixel.blue,&pixel.index);
}
else
if (image->matte != MagickFalse)
count=(ssize_t) sscanf(text,"%ld,%ld: (%u,%u,%u,%u",&x_offset,
&y_offset,&pixel.red,&pixel.green,&pixel.blue,&pixel.opacity);
else
count=(ssize_t) sscanf(text,"%ld,%ld: (%u,%u,%u",&x_offset,
&y_offset,&pixel.red,&pixel.green,&pixel.blue);
if (count < 5)
continue;
q=GetAuthenticPixels(image,x_offset,y_offset,1,1,exception);
if (q == (PixelPacket *) NULL)
continue;
q->red=ScaleAnyToQuantum(pixel.red,range);
q->green=ScaleAnyToQuantum(pixel.green,range);
q->blue=ScaleAnyToQuantum(pixel.blue,range);
if (image->colorspace == CMYKColorspace)
{
indexes=GetAuthenticIndexQueue(image);
*indexes=ScaleAnyToQuantum(pixel.index,range);
}
if (image->matte != MagickFalse)
q->opacity=(Quantum) (QuantumRange-ScaleAnyToQuantum(pixel.opacity,
range));
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
}
}
(void) ReadBlobString(image,text);
if (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0)
{
/*
Allocate next image structure.
*/
AcquireNextImage(image_info,image);
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 (LocaleNCompare((char *) text,MagickID,strlen(MagickID)) == 0);
(void) CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r T X T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterTXTImage() adds attributes for the TXT 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 RegisterTXTImage method is:
%
% size_t RegisterTXTImage(void)
%
*/
ModuleExport size_t RegisterTXTImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("TEXT");
entry->decoder=(DecodeImageHandler *) ReadTXTImage;
entry->encoder=(EncodeImageHandler *) WriteTXTImage;
entry->raw=MagickTrue;
entry->endian_support=MagickTrue;
entry->description=ConstantString("Text");
entry->module=ConstantString("TXT");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("TXT");
entry->decoder=(DecodeImageHandler *) ReadTXTImage;
entry->encoder=(EncodeImageHandler *) WriteTXTImage;
entry->description=ConstantString("Text");
entry->magick=(IsImageFormatHandler *) IsTXT;
entry->module=ConstantString("TXT");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r T X T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterTXTImage() removes format registrations made by the
% TXT module from the list of supported format.
%
% The format of the UnregisterTXTImage method is:
%
% UnregisterTXTImage(void)
%
*/
ModuleExport void UnregisterTXTImage(void)
{
(void) UnregisterMagickInfo("TEXT");
(void) UnregisterMagickInfo("TXT");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e T X T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteTXTImage writes the pixel values as text numbers.
%
% The format of the WriteTXTImage method is:
%
% MagickBooleanType WriteTXTImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o image_info: the image info.
%
% o image: The image.
%
*/
static MagickBooleanType WriteTXTImage(const ImageInfo *image_info,Image *image)
{
char
buffer[MaxTextExtent],
colorspace[MaxTextExtent],
tuple[MaxTextExtent];
ssize_t
y;
MagickBooleanType
status;
MagickOffsetType
scene;
MagickPixelPacket
pixel;
register const IndexPacket
*indexes;
register const PixelPacket
*p;
register ssize_t
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,WriteBlobMode,&image->exception);
if (status == MagickFalse)
return(status);
scene=0;
do
{
(void) CopyMagickString(colorspace,MagickOptionToMnemonic(
MagickColorspaceOptions,(ssize_t) image->colorspace),MaxTextExtent);
LocaleLower(colorspace);
image->depth=GetImageQuantumDepth(image,MagickTrue);
if (image->matte != MagickFalse)
(void) ConcatenateMagickString(colorspace,"a",MaxTextExtent);
(void) FormatMagickString(buffer,MaxTextExtent,
"# ImageMagick pixel enumeration: %.20g,%.20g,%.20g,%s\n",(double)
image->columns,(double) image->rows,(double)
GetQuantumRange(image->depth),colorspace);
(void) WriteBlobString(image,buffer);
GetMagickPixelPacket(image,&pixel);
for (y=0; y < (ssize_t) image->rows; y++)
{
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
indexes=GetVirtualIndexQueue(image);
for (x=0; x < (ssize_t) image->columns; x++)
{
(void) FormatMagickString(buffer,MaxTextExtent,"%.20g,%.20g: ",(double)
x,(double) y);
(void) WriteBlobString(image,buffer);
SetMagickPixelPacket(image,p,indexes+x,&pixel);
(void) CopyMagickString(tuple,"(",MaxTextExtent);
ConcatenateColorComponent(&pixel,RedChannel,X11Compliance,tuple);
(void) ConcatenateMagickString(tuple,",",MaxTextExtent);
ConcatenateColorComponent(&pixel,GreenChannel,X11Compliance,tuple);
(void) ConcatenateMagickString(tuple,",",MaxTextExtent);
ConcatenateColorComponent(&pixel,BlueChannel,X11Compliance,tuple);
if (pixel.colorspace == CMYKColorspace)
{
(void) ConcatenateMagickString(tuple,",",MaxTextExtent);
ConcatenateColorComponent(&pixel,IndexChannel,X11Compliance,tuple);
}
if (pixel.matte != MagickFalse)
{
(void) ConcatenateMagickString(tuple,",",MaxTextExtent);
ConcatenateColorComponent(&pixel,AlphaChannel,X11Compliance,tuple);
}
(void) ConcatenateMagickString(tuple,")",MaxTextExtent);
(void) WriteBlobString(image,tuple);
(void) WriteBlobString(image," ");
GetColorTuple(&pixel,MagickTrue,tuple);
(void) FormatMagickString(buffer,MaxTextExtent,"%s",tuple);
(void) WriteBlobString(image,buffer);
(void) WriteBlobString(image," ");
(void) QueryMagickColorname(image,&pixel,SVGCompliance,tuple,
&image->exception);
(void) WriteBlobString(image,tuple);
(void) WriteBlobString(image,"\n");
p++;
}
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
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);
}