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/* |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% % |
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% % |
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% % |
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% H H DDDD RRRR % |
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% H H D D R R % |
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% HHHHH D D RRRR % |
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% H H D D R R % |
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% H H DDDD R R % |
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% % |
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% % |
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% Read/Write Radiance RGBE Image Format % |
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% % |
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% Software Design % |
|
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% Cristy % |
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% July 1992 % |
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% % |
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% % |
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% Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization % |
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% dedicated to making software imaging solutions freely available. % |
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% % |
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% You may not use this file except in compliance with the License. You may % |
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% obtain a copy of the License at % |
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% % |
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% https://imagemagick.org/script/license.php % |
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% % |
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% Unless required by applicable law or agreed to in writing, software % |
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% distributed under the License is distributed on an "AS IS" BASIS, % |
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
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% See the License for the specific language governing permissions and % |
|
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% limitations under the License. % |
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% % |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% |
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% |
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*/ |
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|
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/* |
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Include declarations. |
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*/ |
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#include "MagickCore/studio.h" |
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#include "MagickCore/blob.h" |
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#include "MagickCore/blob-private.h" |
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#include "MagickCore/cache.h" |
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#include "MagickCore/colorspace.h" |
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#include "MagickCore/colorspace-private.h" |
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#include "MagickCore/exception.h" |
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#include "MagickCore/exception-private.h" |
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#include "MagickCore/image.h" |
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#include "MagickCore/image-private.h" |
|
|
#include "MagickCore/list.h" |
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|
#include "MagickCore/magick.h" |
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#include "MagickCore/memory_.h" |
|
|
#include "MagickCore/monitor.h" |
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|
#include "MagickCore/monitor-private.h" |
|
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#include "MagickCore/pixel-accessor.h" |
|
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#include "MagickCore/property.h" |
|
|
#include "MagickCore/quantum-private.h" |
|
|
#include "MagickCore/static.h" |
|
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#include "MagickCore/string_.h" |
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#include "MagickCore/string-private.h" |
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#include "MagickCore/module.h" |
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|
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/* |
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|
Forward declarations. |
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*/ |
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static MagickBooleanType |
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WriteHDRImage(const ImageInfo *,Image *,ExceptionInfo *); |
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|
|
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/* |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% % |
|
|
% % |
|
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% % |
|
|
% I s H D R % |
|
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% % |
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% % |
|
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% % |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
|
|
% |
|
|
% 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) |
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|
return(MagickFalse); |
|
|
if (LocaleNCompare((const char *) magick,"#?RADIANCE",10) == 0) |
|
|
return(MagickTrue); |
|
|
if (LocaleNCompare((const char *) magick,"#?RGBE",6) == 0) |
|
|
return(MagickTrue); |
|
|
return(MagickFalse); |
|
|
} |
|
|
|
|
|
/* |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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|
% % |
|
|
% % |
|
|
% % |
|
|
% 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; |
|
|
|
|
|
register Quantum |
|
|
*q; |
|
|
|
|
|
register ssize_t |
|
|
i, |
|
|
x; |
|
|
|
|
|
register unsigned char |
|
|
*p; |
|
|
|
|
|
ssize_t |
|
|
count, |
|
|
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(c) && (image->columns == 0) && (image->rows == 0)) |
|
|
{ |
|
|
if (c == (int) '#') |
|
|
{ |
|
|
char |
|
|
*comment; |
|
|
|
|
|
register 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(c) == MagickFalse) |
|
|
c=ReadBlobByte(image); |
|
|
else |
|
|
{ |
|
|
register 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(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++) |
|
|
{ |
|
|
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 |
|
|
{ |
|
|
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 |
|
|
|
|
|
register 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; |
|
|
|
|
|
register const Quantum |
|
|
*p; |
|
|
|
|
|
register 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; |
|
|
pixel[0]=(unsigned char) (gamma*QuantumScale*GetPixelRed(image,p)); |
|
|
pixel[1]=(unsigned char) (gamma*QuantumScale*GetPixelGreen(image,p)); |
|
|
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); |
|
|
}
|
|
|
|
