/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% CCCC U U BBBB EEEEE %
% C U U B B E %
% C U U BBBB EEE %
% C U U B B E %
% CCCC UUU BBBB EEEEE %
% %
% %
% Cube LUT Image Format %
% %
% Software Design %
% Cristy %
% July 2018 %
% %
% %
% Copyright 1999-2019 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. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% See Cube LUT specification 1.0 @
% https://wwwimages2.adobe.com/content/dam/acom/en/products/speedgrade/cc/pdfs/cube-lut-specification-1.0.pdf
%
*/
/*
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/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/module.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/resource_.h"
#include "MagickCore/static.h"
#include "MagickCore/string_.h"
#include "MagickCore/string-private.h"
#include "MagickCore/thread-private.h"
#include "MagickCore/token.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d C U B E I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadCUBEImage() creates a Cube color lookup table image 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 ReadCUBEImage method is:
%
% Image *ReadCUBEImage(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 *ReadCUBEImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
#define FlattenCube(level,b,g,r) ((ssize_t) ((b)*(level)*(level)+(g)*(level)+(r)))
typedef struct _CubePixel
{
float
r,
g,
b;
} CubePixel;
char
*buffer,
token[MagickPathExtent],
value[MagickPathExtent];
CubePixel
*cube;
Image
*image;
MagickBooleanType
status;
MemoryInfo
*cube_info;
register char
*p;
size_t
cube_level,
hald_level;
ssize_t
b,
i,
n;
/*
Read CUBE color lookup table.
*/
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);
}
cube_level=0;
cube_info=(MemoryInfo *) NULL;
cube=(CubePixel *) NULL;
n=0;
buffer=AcquireString("");
*buffer='\0';
p=buffer;
while (ReadBlobString(image,p) != (char *) NULL)
{
const char
*q;
q=p;
GetNextToken(q,&q,MagickPathExtent,token);
if ((*token == '#') || (*token == '\0'))
continue;
if ((LocaleCompare(token,"LUT_1D_SIZE") == 0) ||
(LocaleCompare(token,"LUT_3D_SIZE") == 0))
{
if (cube_info != (MemoryInfo *) NULL)
cube_info=RelinquishVirtualMemory(cube_info);
GetNextToken(q,&q,MagickPathExtent,value);
cube_level=(size_t) StringToLong(value);
if (LocaleCompare(token,"LUT_1D_SIZE") == 0)
cube_level=(size_t) ceil(pow((double) cube_level,1.0/3.0));
if ((cube_level < 2) || (cube_level > 256))
{
buffer=DestroyString(buffer);
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
}
cube_info=AcquireVirtualMemory(cube_level*cube_level,cube_level*
sizeof(*cube));
if (cube_info == (MemoryInfo *) NULL)
{
buffer=DestroyString(buffer);
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
}
cube=(CubePixel *) GetVirtualMemoryBlob(cube_info);
(void) memset(cube,0,cube_level*cube_level*cube_level*sizeof(*cube));
}
else
if (LocaleCompare(token,"TITLE ") == 0)
{
GetNextToken(q,&q,MagickPathExtent,value);
(void) SetImageProperty(image,"title",value,exception);
}
else
if (cube_level != 0)
{
char
*q;
if (n >= (ssize_t) (cube_level*cube_level*cube_level))
break;
q=buffer;
cube[n].r=StringToDouble(q,&q);
cube[n].g=StringToDouble(q,&q);
cube[n].b=StringToDouble(q,&q);
n++;
}
else
if (('+' < *buffer) && (*buffer < ':'))
break;
}
buffer=DestroyString(buffer);
if (cube_level == 0)
{
if (cube_info != (MemoryInfo *) NULL)
cube_info=RelinquishVirtualMemory(cube_info);
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
}
/*
Write HALD image.
*/
status=MagickTrue;
hald_level=image_info->scene;
if ((hald_level < 2) || (hald_level > 256))
hald_level=8;
image->columns=(size_t) (hald_level*hald_level*hald_level);
image->rows=(size_t) (hald_level*hald_level*hald_level);
status=SetImageExtent(image,image->columns,image->rows,exception);
if (status == MagickFalse)
{
cube_info=RelinquishVirtualMemory(cube_info);
return(DestroyImageList(image));
}
for (b=0; b < (ssize_t) (hald_level*hald_level); b++)
{
register ssize_t
g;
if (status == MagickFalse)
continue;
for (g=0; g < (ssize_t) (hald_level*hald_level); g++)
{
register Quantum
*magick_restrict q;
register ssize_t
r;
if (status == MagickFalse)
continue;
q=QueueAuthenticPixels(image,(g % hald_level)*(hald_level*hald_level),
(b*hald_level)+((g/hald_level) % (hald_level*hald_level)),hald_level*
hald_level,1,exception);
if (q == (Quantum *) NULL)
{
status=MagickFalse;
continue;
}
for (r=0; r < (ssize_t) (hald_level*hald_level); r++)
{
CubePixel
index,
next,
offset,
scale;
offset.r=(PerceptibleReciprocal((double) (hald_level*hald_level)-1.0)*
r)*(cube_level-1.0);
index.r=floor(offset.r);
scale.r=offset.r-index.r;
next.r=index.r+1;
if ((size_t) index.r == (cube_level-1))
next.r=index.r;
offset.g=(PerceptibleReciprocal(((double) hald_level*hald_level)-1.0)*
g)*(cube_level-1.0);
index.g=floor(offset.g);
scale.g=offset.g-index.g;
next.g=index.g+1;
if ((size_t) index.g == (cube_level-1))
next.g=index.g;
offset.b=(PerceptibleReciprocal(((double) hald_level*hald_level)-1.0)*
b)*(cube_level-1.0);
index.b=floor(offset.b);
scale.b=offset.b-index.b;
next.b=index.b+1;
if ((size_t) index.b == (cube_level-1))
next.b=index.b;
SetPixelRed(image,ClampToQuantum(QuantumRange*(
cube[FlattenCube(cube_level,index.b,index.g,index.r)].r+scale.r*(
cube[FlattenCube(cube_level,index.b,index.g,next.r)].r-
cube[FlattenCube(cube_level,index.b,index.g,index.r)].r))),q);
SetPixelGreen(image,ClampToQuantum(QuantumRange*(
cube[FlattenCube(cube_level,index.b,index.g,index.r)].g+scale.g*(
cube[FlattenCube(cube_level,index.b,next.g,index.r)].g-
cube[FlattenCube(cube_level,index.b,index.g,index.r)].g))),q);
SetPixelBlue(image,ClampToQuantum(QuantumRange*(
cube[FlattenCube(cube_level,index.b,index.g,index.r)].b+scale.b*(
cube[FlattenCube(cube_level,next.b,index.g,index.r)].b-
cube[FlattenCube(cube_level,index.b,index.g,index.r)].b))),q);
q+=GetPixelChannels(image);
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
status=MagickFalse;
}
}
cube_info=RelinquishVirtualMemory(cube_info);
(void) CloseBlob(image);
if (status == MagickFalse)
return(DestroyImageList(image));
if (image_info->scene != 0)
for (i=0; i < (ssize_t) image_info->scene; i++)
AppendImageToList(&image,CloneImage(image,0,0,MagickTrue,exception));
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r H A L D I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterCUBEImage() adds attributes for the Hald color lookup table 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 RegisterCUBEImage method is:
%
% size_t RegisterCUBEImage(void)
%
*/
ModuleExport size_t RegisterCUBEImage(void)
{
MagickInfo
*entry;
entry=AcquireMagickInfo("CUBE","CUBE","Cube LUT");
entry->decoder=(DecodeImageHandler *) ReadCUBEImage;
entry->flags^=CoderAdjoinFlag;
entry->format_type=ImplicitFormatType;
entry->flags|=CoderRawSupportFlag;
entry->flags|=CoderEndianSupportFlag;
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r H A L D I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterCUBEImage() removes format registrations made by the
% CUBE module from the list of supported formats.
%
% The format of the UnregisterCUBEImage method is:
%
% UnregisterCUBEImage(void)
%
*/
ModuleExport void UnregisterCUBEImage(void)
{
(void) UnregisterMagickInfo("CUBE");
}