|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% H H DDDD RRRR %
|
|
|
% H H D D R R %
|
|
|
% HHHHH D D RRRR %
|
|
|
% H H D D R R %
|
|
|
% H H DDDD R R %
|
|
|
% %
|
|
|
% %
|
|
|
% Read/Write Radiance RGBE Image Format %
|
|
|
% %
|
|
|
% Software Design %
|
|
|
% Cristy %
|
|
|
% July 1992 %
|
|
|
% %
|
|
|
% %
|
|
|
% Copyright 1999-2021 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 %
|
|
|
% %
|
|
|
% https://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/colorspace.h"
|
|
|
#include "MagickCore/colorspace-private.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/property.h"
|
|
|
#include "MagickCore/quantum-private.h"
|
|
|
#include "MagickCore/static.h"
|
|
|
#include "MagickCore/string_.h"
|
|
|
#include "MagickCore/string-private.h"
|
|
|
#include "MagickCore/module.h"
|
|
|
|
|
|
/*
|
|
|
Forward declarations.
|
|
|
*/
|
|
|
static MagickBooleanType
|
|
|
WriteHDRImage(const ImageInfo *,Image *,ExceptionInfo *);
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% I s H D R %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% IsHDR() returns MagickTrue if the image format type, identified by the
|
|
|
% magick string, is Radiance RGBE image format.
|
|
|
%
|
|
|
% The format of the IsHDR method is:
|
|
|
%
|
|
|
% MagickBooleanType IsHDR(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 IsHDR(const unsigned char *magick,
|
|
|
const size_t length)
|
|
|
{
|
|
|
if (length < 10)
|
|
|
return(MagickFalse);
|
|
|
if (LocaleNCompare((const char *) magick,"#?RADIANCE",10) == 0)
|
|
|
return(MagickTrue);
|
|
|
if (LocaleNCompare((const char *) magick,"#?RGBE",6) == 0)
|
|
|
return(MagickTrue);
|
|
|
return(MagickFalse);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e a d H D R I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% ReadHDRImage() reads the Radiance RGBE image format 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 ReadHDRImage method is:
|
|
|
%
|
|
|
% Image *ReadHDRImage(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 *ReadHDRImage(const ImageInfo *image_info,ExceptionInfo *exception)
|
|
|
{
|
|
|
char
|
|
|
format[MagickPathExtent],
|
|
|
keyword[MagickPathExtent],
|
|
|
tag[MagickPathExtent],
|
|
|
value[MagickPathExtent];
|
|
|
|
|
|
double
|
|
|
gamma;
|
|
|
|
|
|
Image
|
|
|
*image;
|
|
|
|
|
|
int
|
|
|
c;
|
|
|
|
|
|
MagickBooleanType
|
|
|
status,
|
|
|
value_expected;
|
|
|
|
|
|
Quantum
|
|
|
*q;
|
|
|
|
|
|
ssize_t
|
|
|
i,
|
|
|
x;
|
|
|
|
|
|
ssize_t
|
|
|
y;
|
|
|
|
|
|
unsigned char
|
|
|
*end,
|
|
|
pixel[4],
|
|
|
*pixels;
|
|
|
|
|
|
/*
|
|
|
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);
|
|
|
}
|
|
|
/*
|
|
|
Decode image header.
|
|
|
*/
|
|
|
image->columns=0;
|
|
|
image->rows=0;
|
|
|
*format='\0';
|
|
|
c=ReadBlobByte(image);
|
|
|
if (c == EOF)
|
|
|
{
|
|
|
image=DestroyImage(image);
|
|
|
return((Image *) NULL);
|
|
|
}
|
|
|
while (isgraph((int) ((unsigned char) c)) && (image->columns == 0) && (image->rows == 0))
|
|
|
{
|
|
|
if (c == (int) '#')
|
|
|
{
|
|
|
char
|
|
|
*comment;
|
|
|
|
|
|
char
|
|
|
*p;
|
|
|
|
|
|
size_t
|
|
|
length;
|
|
|
|
|
|
/*
|
|
|
Read comment-- any text between # and end-of-line.
|
|
|
*/
|
|
|
length=MagickPathExtent;
|
|
|
comment=AcquireString((char *) NULL);
|
|
|
for (p=comment; comment != (char *) NULL; p++)
|
|
|
{
|
|
|
c=ReadBlobByte(image);
|
|
|
if ((c == EOF) || (c == (int) '\n'))
|
|
|
break;
|
|
|
if ((size_t) (p-comment+1) >= length)
|
|
|
{
|
|
|
*p='\0';
|
|
|
length<<=1;
|
|
|
comment=(char *) ResizeQuantumMemory(comment,length+
|
|
|
MagickPathExtent,sizeof(*comment));
|
|
|
if (comment == (char *) NULL)
|
|
|
break;
|
|
|
p=comment+strlen(comment);
|
|
|
}
|
|
|
*p=(char) c;
|
|
|
}
|
|
|
if (comment == (char *) NULL)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
*p='\0';
|
|
|
(void) SetImageProperty(image,"comment",comment,exception);
|
|
|
comment=DestroyString(comment);
|
|
|
c=ReadBlobByte(image);
|
|
|
}
|
|
|
else
|
|
|
if (isalnum((int) ((unsigned char) c)) == 0)
|
|
|
c=ReadBlobByte(image);
|
|
|
else
|
|
|
{
|
|
|
char
|
|
|
*p;
|
|
|
|
|
|
/*
|
|
|
Determine a keyword and its value.
|
|
|
*/
|
|
|
p=keyword;
|
|
|
do
|
|
|
{
|
|
|
if ((size_t) (p-keyword) < (MagickPathExtent-1))
|
|
|
*p++=c;
|
|
|
c=ReadBlobByte(image);
|
|
|
} while (isalnum((int) ((unsigned char) c)) || (c == '_'));
|
|
|
*p='\0';
|
|
|
value_expected=MagickFalse;
|
|
|
while ((isspace((int) ((unsigned char) c)) != 0) || (c == '='))
|
|
|
{
|
|
|
if (c == '=')
|
|
|
value_expected=MagickTrue;
|
|
|
c=ReadBlobByte(image);
|
|
|
}
|
|
|
if (LocaleCompare(keyword,"Y") == 0)
|
|
|
value_expected=MagickTrue;
|
|
|
if (value_expected == MagickFalse)
|
|
|
continue;
|
|
|
p=value;
|
|
|
while ((c != '\n') && (c != '\0') && (c != EOF))
|
|
|
{
|
|
|
if ((size_t) (p-value) < (MagickPathExtent-1))
|
|
|
*p++=c;
|
|
|
c=ReadBlobByte(image);
|
|
|
}
|
|
|
*p='\0';
|
|
|
/*
|
|
|
Assign a value to the specified keyword.
|
|
|
*/
|
|
|
switch (*keyword)
|
|
|
{
|
|
|
case 'F':
|
|
|
case 'f':
|
|
|
{
|
|
|
if (LocaleCompare(keyword,"format") == 0)
|
|
|
{
|
|
|
(void) CopyMagickString(format,value,MagickPathExtent);
|
|
|
break;
|
|
|
}
|
|
|
(void) FormatLocaleString(tag,MagickPathExtent,"hdr:%s",keyword);
|
|
|
(void) SetImageProperty(image,tag,value,exception);
|
|
|
break;
|
|
|
}
|
|
|
case 'G':
|
|
|
case 'g':
|
|
|
{
|
|
|
if (LocaleCompare(keyword,"gamma") == 0)
|
|
|
{
|
|
|
image->gamma=StringToDouble(value,(char **) NULL);
|
|
|
break;
|
|
|
}
|
|
|
(void) FormatLocaleString(tag,MagickPathExtent,"hdr:%s",keyword);
|
|
|
(void) SetImageProperty(image,tag,value,exception);
|
|
|
break;
|
|
|
}
|
|
|
case 'P':
|
|
|
case 'p':
|
|
|
{
|
|
|
if (LocaleCompare(keyword,"primaries") == 0)
|
|
|
{
|
|
|
float
|
|
|
chromaticity[6],
|
|
|
white_point[2];
|
|
|
|
|
|
int
|
|
|
count;
|
|
|
|
|
|
count=sscanf(value,"%g %g %g %g %g %g %g %g",&chromaticity[0],
|
|
|
&chromaticity[1],&chromaticity[2],&chromaticity[3],
|
|
|
&chromaticity[4],&chromaticity[5],&white_point[0],
|
|
|
&white_point[1]);
|
|
|
if (count == 8)
|
|
|
{
|
|
|
image->chromaticity.red_primary.x=chromaticity[0];
|
|
|
image->chromaticity.red_primary.y=chromaticity[1];
|
|
|
image->chromaticity.green_primary.x=chromaticity[2];
|
|
|
image->chromaticity.green_primary.y=chromaticity[3];
|
|
|
image->chromaticity.blue_primary.x=chromaticity[4];
|
|
|
image->chromaticity.blue_primary.y=chromaticity[5];
|
|
|
image->chromaticity.white_point.x=white_point[0],
|
|
|
image->chromaticity.white_point.y=white_point[1];
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
(void) FormatLocaleString(tag,MagickPathExtent,"hdr:%s",keyword);
|
|
|
(void) SetImageProperty(image,tag,value,exception);
|
|
|
break;
|
|
|
}
|
|
|
case 'Y':
|
|
|
case 'y':
|
|
|
{
|
|
|
char
|
|
|
target[] = "Y";
|
|
|
|
|
|
if (strcmp(keyword,target) == 0)
|
|
|
{
|
|
|
int
|
|
|
height,
|
|
|
width;
|
|
|
|
|
|
if (sscanf(value,"%d +X %d",&height,&width) == 2)
|
|
|
{
|
|
|
image->columns=(size_t) width;
|
|
|
image->rows=(size_t) height;
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
(void) FormatLocaleString(tag,MagickPathExtent,"hdr:%s",keyword);
|
|
|
(void) SetImageProperty(image,tag,value,exception);
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
{
|
|
|
(void) FormatLocaleString(tag,MagickPathExtent,"hdr:%s",keyword);
|
|
|
(void) SetImageProperty(image,tag,value,exception);
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
if ((image->columns == 0) && (image->rows == 0))
|
|
|
while (isspace((int) ((unsigned char) c)) != 0)
|
|
|
c=ReadBlobByte(image);
|
|
|
}
|
|
|
if ((LocaleCompare(format,"32-bit_rle_rgbe") != 0) &&
|
|
|
(LocaleCompare(format,"32-bit_rle_xyze") != 0))
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
if ((image->columns == 0) || (image->rows == 0))
|
|
|
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
|
|
|
(void) SetImageColorspace(image,RGBColorspace,exception);
|
|
|
if (LocaleCompare(format,"32-bit_rle_xyze") == 0)
|
|
|
(void) SetImageColorspace(image,XYZColorspace,exception);
|
|
|
image->compression=(image->columns < 8) || (image->columns > 0x7ffff) ?
|
|
|
NoCompression : RLECompression;
|
|
|
if (image_info->ping != MagickFalse)
|
|
|
{
|
|
|
(void) CloseBlob(image);
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
status=SetImageExtent(image,image->columns,image->rows,exception);
|
|
|
if (status == MagickFalse)
|
|
|
return(DestroyImageList(image));
|
|
|
/*
|
|
|
Read RGBE (red+green+blue+exponent) pixels.
|
|
|
*/
|
|
|
pixels=(unsigned char *) AcquireQuantumMemory(image->columns,4*
|
|
|
sizeof(*pixels));
|
|
|
if (pixels == (unsigned char *) NULL)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
(void) memset(pixels,0,4*image->columns*sizeof(*pixels));
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
ssize_t
|
|
|
count;
|
|
|
|
|
|
if (image->compression != RLECompression)
|
|
|
{
|
|
|
count=ReadBlob(image,4*image->columns*sizeof(*pixels),pixels);
|
|
|
if (count != (ssize_t) (4*image->columns*sizeof(*pixels)))
|
|
|
break;
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
count=ReadBlob(image,4*sizeof(*pixel),pixel);
|
|
|
if (count != 4)
|
|
|
break;
|
|
|
if ((size_t) ((((size_t) pixel[2]) << 8) | pixel[3]) != image->columns)
|
|
|
{
|
|
|
(void) memcpy(pixels,pixel,4*sizeof(*pixel));
|
|
|
count=ReadBlob(image,4*(image->columns-1)*sizeof(*pixels),pixels+4);
|
|
|
image->compression=NoCompression;
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
unsigned char
|
|
|
*p;
|
|
|
|
|
|
p=pixels;
|
|
|
for (i=0; i < 4; i++)
|
|
|
{
|
|
|
end=&pixels[(i+1)*image->columns];
|
|
|
while (p < end)
|
|
|
{
|
|
|
count=ReadBlob(image,2*sizeof(*pixel),pixel);
|
|
|
if (count < 1)
|
|
|
break;
|
|
|
if (pixel[0] > 128)
|
|
|
{
|
|
|
count=(ssize_t) pixel[0]-128;
|
|
|
if ((count == 0) || (count > (ssize_t) (end-p)))
|
|
|
break;
|
|
|
while (count-- > 0)
|
|
|
*p++=pixel[1];
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
count=(ssize_t) pixel[0];
|
|
|
if ((count == 0) || (count > (ssize_t) (end-p)))
|
|
|
break;
|
|
|
*p++=pixel[1];
|
|
|
if (--count > 0)
|
|
|
{
|
|
|
count=ReadBlob(image,(size_t) count*sizeof(*p),p);
|
|
|
if (count < 1)
|
|
|
break;
|
|
|
p+=count;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
i=0;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
if (image->compression == RLECompression)
|
|
|
{
|
|
|
pixel[0]=pixels[x];
|
|
|
pixel[1]=pixels[x+image->columns];
|
|
|
pixel[2]=pixels[x+2*image->columns];
|
|
|
pixel[3]=pixels[x+3*image->columns];
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
pixel[0]=pixels[i++];
|
|
|
pixel[1]=pixels[i++];
|
|
|
pixel[2]=pixels[i++];
|
|
|
pixel[3]=pixels[i++];
|
|
|
}
|
|
|
SetPixelRed(image,0,q);
|
|
|
SetPixelGreen(image,0,q);
|
|
|
SetPixelBlue(image,0,q);
|
|
|
if (pixel[3] != 0)
|
|
|
{
|
|
|
gamma=pow(2.0,pixel[3]-(128.0+8.0));
|
|
|
SetPixelRed(image,ClampToQuantum(QuantumRange*gamma*pixel[0]),q);
|
|
|
SetPixelGreen(image,ClampToQuantum(QuantumRange*gamma*pixel[1]),q);
|
|
|
SetPixelBlue(image,ClampToQuantum(QuantumRange*gamma*pixel[2]),q);
|
|
|
}
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
if (EOFBlob(image) != MagickFalse)
|
|
|
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
|
|
|
image->filename);
|
|
|
(void) CloseBlob(image);
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e g i s t e r H D R I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% RegisterHDRImage() adds attributes for the Radiance RGBE 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 RegisterHDRImage method is:
|
|
|
%
|
|
|
% size_t RegisterHDRImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport size_t RegisterHDRImage(void)
|
|
|
{
|
|
|
MagickInfo
|
|
|
*entry;
|
|
|
|
|
|
entry=AcquireMagickInfo("HDR","HDR","Radiance RGBE image format");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadHDRImage;
|
|
|
entry->encoder=(EncodeImageHandler *) WriteHDRImage;
|
|
|
entry->magick=(IsImageFormatHandler *) IsHDR;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
return(MagickImageCoderSignature);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r H D R I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% UnregisterHDRImage() removes format registrations made by the
|
|
|
% HDR module from the list of supported formats.
|
|
|
%
|
|
|
% The format of the UnregisterHDRImage method is:
|
|
|
%
|
|
|
% UnregisterHDRImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport void UnregisterHDRImage(void)
|
|
|
{
|
|
|
(void) UnregisterMagickInfo("HDR");
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% W r i t e H D R I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% WriteHDRImage() writes an image in the Radience RGBE image format.
|
|
|
%
|
|
|
% The format of the WriteHDRImage method is:
|
|
|
%
|
|
|
% MagickBooleanType WriteHDRImage(const ImageInfo *image_info,
|
|
|
% Image *image,ExceptionInfo *exception)
|
|
|
%
|
|
|
% A description of each parameter follows.
|
|
|
%
|
|
|
% o image_info: the image info.
|
|
|
%
|
|
|
% o image: The image.
|
|
|
%
|
|
|
*/
|
|
|
|
|
|
static size_t HDRWriteRunlengthPixels(Image *image,unsigned char *pixels)
|
|
|
{
|
|
|
#define MinimumRunlength 4
|
|
|
|
|
|
size_t
|
|
|
p,
|
|
|
q;
|
|
|
|
|
|
size_t
|
|
|
runlength;
|
|
|
|
|
|
ssize_t
|
|
|
count,
|
|
|
previous_count;
|
|
|
|
|
|
unsigned char
|
|
|
pixel[2];
|
|
|
|
|
|
for (p=0; p < image->columns; )
|
|
|
{
|
|
|
q=p;
|
|
|
runlength=0;
|
|
|
previous_count=0;
|
|
|
while ((runlength < MinimumRunlength) && (q < image->columns))
|
|
|
{
|
|
|
q+=runlength;
|
|
|
previous_count=(ssize_t) runlength;
|
|
|
runlength=1;
|
|
|
while ((pixels[q] == pixels[q+runlength]) &&
|
|
|
((q+runlength) < image->columns) && (runlength < 127))
|
|
|
runlength++;
|
|
|
}
|
|
|
if ((previous_count > 1) && (previous_count == (ssize_t) (q-p)))
|
|
|
{
|
|
|
pixel[0]=(unsigned char) (128+previous_count);
|
|
|
pixel[1]=pixels[p];
|
|
|
if (WriteBlob(image,2*sizeof(*pixel),pixel) < 1)
|
|
|
break;
|
|
|
p=q;
|
|
|
}
|
|
|
while (p < q)
|
|
|
{
|
|
|
count=(ssize_t) (q-p);
|
|
|
if (count > 128)
|
|
|
count=128;
|
|
|
pixel[0]=(unsigned char) count;
|
|
|
if (WriteBlob(image,sizeof(*pixel),pixel) < 1)
|
|
|
break;
|
|
|
if (WriteBlob(image,(size_t) count*sizeof(*pixel),&pixels[p]) < 1)
|
|
|
break;
|
|
|
p+=count;
|
|
|
}
|
|
|
if (runlength >= MinimumRunlength)
|
|
|
{
|
|
|
pixel[0]=(unsigned char) (128+runlength);
|
|
|
pixel[1]=pixels[q];
|
|
|
if (WriteBlob(image,2*sizeof(*pixel),pixel) < 1)
|
|
|
break;
|
|
|
p+=runlength;
|
|
|
}
|
|
|
}
|
|
|
return(p);
|
|
|
}
|
|
|
|
|
|
static MagickBooleanType WriteHDRImage(const ImageInfo *image_info,Image *image,
|
|
|
ExceptionInfo *exception)
|
|
|
{
|
|
|
char
|
|
|
header[MagickPathExtent];
|
|
|
|
|
|
const char
|
|
|
*property;
|
|
|
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
const Quantum
|
|
|
*p;
|
|
|
|
|
|
ssize_t
|
|
|
i,
|
|
|
x;
|
|
|
|
|
|
size_t
|
|
|
length;
|
|
|
|
|
|
ssize_t
|
|
|
count,
|
|
|
y;
|
|
|
|
|
|
unsigned char
|
|
|
pixel[4],
|
|
|
*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);
|
|
|
if (IsRGBColorspace(image->colorspace) == MagickFalse)
|
|
|
(void) TransformImageColorspace(image,RGBColorspace,exception);
|
|
|
/*
|
|
|
Write header.
|
|
|
*/
|
|
|
(void) memset(header,' ',MagickPathExtent);
|
|
|
length=CopyMagickString(header,"#?RADIANCE\n",MagickPathExtent);
|
|
|
(void) WriteBlob(image,length,(unsigned char *) header);
|
|
|
property=GetImageProperty(image,"comment",exception);
|
|
|
if ((property != (const char *) NULL) &&
|
|
|
(strchr(property,'\n') == (char *) NULL))
|
|
|
{
|
|
|
count=FormatLocaleString(header,MagickPathExtent,"#%.*s\n",
|
|
|
MagickPathExtent-3,property);
|
|
|
(void) WriteBlob(image,(size_t) count,(unsigned char *) header);
|
|
|
}
|
|
|
property=GetImageProperty(image,"hdr:exposure",exception);
|
|
|
if (property != (const char *) NULL)
|
|
|
{
|
|
|
count=FormatLocaleString(header,MagickPathExtent,"EXPOSURE=%g\n",
|
|
|
strtod(property,(char **) NULL));
|
|
|
(void) WriteBlob(image,(size_t) count,(unsigned char *) header);
|
|
|
}
|
|
|
if (image->gamma != 0.0)
|
|
|
{
|
|
|
count=FormatLocaleString(header,MagickPathExtent,"GAMMA=%g\n",
|
|
|
image->gamma);
|
|
|
(void) WriteBlob(image,(size_t) count,(unsigned char *) header);
|
|
|
}
|
|
|
count=FormatLocaleString(header,MagickPathExtent,
|
|
|
"PRIMARIES=%g %g %g %g %g %g %g %g\n",
|
|
|
image->chromaticity.red_primary.x,image->chromaticity.red_primary.y,
|
|
|
image->chromaticity.green_primary.x,image->chromaticity.green_primary.y,
|
|
|
image->chromaticity.blue_primary.x,image->chromaticity.blue_primary.y,
|
|
|
image->chromaticity.white_point.x,image->chromaticity.white_point.y);
|
|
|
(void) WriteBlob(image,(size_t) count,(unsigned char *) header);
|
|
|
length=CopyMagickString(header,"FORMAT=32-bit_rle_rgbe\n\n",MagickPathExtent);
|
|
|
(void) WriteBlob(image,length,(unsigned char *) header);
|
|
|
count=FormatLocaleString(header,MagickPathExtent,"-Y %.20g +X %.20g\n",
|
|
|
(double) image->rows,(double) image->columns);
|
|
|
(void) WriteBlob(image,(size_t) count,(unsigned char *) header);
|
|
|
/*
|
|
|
Write HDR pixels.
|
|
|
*/
|
|
|
pixels=(unsigned char *) AcquireQuantumMemory(image->columns+128,4*
|
|
|
sizeof(*pixels));
|
|
|
if (pixels == (unsigned char *) NULL)
|
|
|
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
(void) memset(pixels,0,4*(image->columns+128)*sizeof(*pixels));
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
|
|
|
if (p == (const Quantum *) NULL)
|
|
|
break;
|
|
|
if ((image->columns >= 8) && (image->columns <= 0x7ffff))
|
|
|
{
|
|
|
pixel[0]=2;
|
|
|
pixel[1]=2;
|
|
|
pixel[2]=(unsigned char) (image->columns >> 8);
|
|
|
pixel[3]=(unsigned char) (image->columns & 0xff);
|
|
|
count=WriteBlob(image,4*sizeof(*pixel),pixel);
|
|
|
if (count != (ssize_t) (4*sizeof(*pixel)))
|
|
|
break;
|
|
|
}
|
|
|
i=0;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
double
|
|
|
gamma;
|
|
|
|
|
|
pixel[0]=0;
|
|
|
pixel[1]=0;
|
|
|
pixel[2]=0;
|
|
|
pixel[3]=0;
|
|
|
gamma=QuantumScale*GetPixelRed(image,p);
|
|
|
if ((QuantumScale*GetPixelGreen(image,p)) > gamma)
|
|
|
gamma=QuantumScale*GetPixelGreen(image,p);
|
|
|
if ((QuantumScale*GetPixelBlue(image,p)) > gamma)
|
|
|
gamma=QuantumScale*GetPixelBlue(image,p);
|
|
|
if (gamma > MagickEpsilon)
|
|
|
{
|
|
|
int
|
|
|
exponent;
|
|
|
|
|
|
gamma=frexp(gamma,&exponent)*256.0/gamma;
|
|
|
if (GetPixelRed(image,p) > 0)
|
|
|
pixel[0]=(unsigned char) (gamma*QuantumScale*GetPixelRed(image,p));
|
|
|
if (GetPixelGreen(image,p) > 0)
|
|
|
pixel[1]=(unsigned char) (gamma*QuantumScale*
|
|
|
GetPixelGreen(image,p));
|
|
|
if (GetPixelBlue(image,p) > 0)
|
|
|
pixel[2]=(unsigned char) (gamma*QuantumScale*GetPixelBlue(image,p));
|
|
|
pixel[3]=(unsigned char) (exponent+128);
|
|
|
}
|
|
|
if ((image->columns >= 8) && (image->columns <= 0x7ffff))
|
|
|
{
|
|
|
pixels[x]=pixel[0];
|
|
|
pixels[x+image->columns]=pixel[1];
|
|
|
pixels[x+2*image->columns]=pixel[2];
|
|
|
pixels[x+3*image->columns]=pixel[3];
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
pixels[i++]=pixel[0];
|
|
|
pixels[i++]=pixel[1];
|
|
|
pixels[i++]=pixel[2];
|
|
|
pixels[i++]=pixel[3];
|
|
|
}
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
if ((image->columns >= 8) && (image->columns <= 0x7ffff))
|
|
|
{
|
|
|
for (i=0; i < 4; i++)
|
|
|
length=HDRWriteRunlengthPixels(image,&pixels[i*image->columns]);
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
count=WriteBlob(image,4*image->columns*sizeof(*pixels),pixels);
|
|
|
if (count != (ssize_t) (4*image->columns*sizeof(*pixels)))
|
|
|
break;
|
|
|
}
|
|
|
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
(void) CloseBlob(image);
|
|
|
return(MagickTrue);
|
|
|
}
|
