|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% GGGG RRRR AAA DDDD IIIII EEEEE N N TTTTT %
|
|
|
% G R R A A D D I E NN N T %
|
|
|
% G GG RRRR AAAAA D D I EEE N N N T %
|
|
|
% G G R R A A D D I E N NN T %
|
|
|
% GGG R R A A DDDD IIIII EEEEE N N T %
|
|
|
% %
|
|
|
% %
|
|
|
% Read An Image Filled Using Gradient. %
|
|
|
% %
|
|
|
% 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/attribute.h"
|
|
|
#include "MagickCore/blob.h"
|
|
|
#include "MagickCore/blob-private.h"
|
|
|
#include "MagickCore/channel.h"
|
|
|
#include "MagickCore/color.h"
|
|
|
#include "MagickCore/color-private.h"
|
|
|
#include "MagickCore/colorspace-private.h"
|
|
|
#include "MagickCore/constitute.h"
|
|
|
#include "MagickCore/draw.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/paint.h"
|
|
|
#include "MagickCore/pixel-accessor.h"
|
|
|
#include "MagickCore/quantum-private.h"
|
|
|
#include "MagickCore/static.h"
|
|
|
#include "MagickCore/string_.h"
|
|
|
#include "MagickCore/module.h"
|
|
|
#include "MagickCore/studio.h"
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e a d G R A D I E N T I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% ReadGRADIENTImage creates a gradient image and initializes it to
|
|
|
% the color range as specified by the filename. It allocates the memory
|
|
|
% necessary for the new Image structure and returns a pointer to the new
|
|
|
% image.
|
|
|
%
|
|
|
% The format of the ReadGRADIENTImage method is:
|
|
|
%
|
|
|
% Image *ReadGRADIENTImage(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 *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception)
|
|
|
{
|
|
|
Image
|
|
|
*image;
|
|
|
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
PixelInfo
|
|
|
pixel;
|
|
|
|
|
|
ssize_t
|
|
|
x;
|
|
|
|
|
|
Quantum
|
|
|
*q;
|
|
|
|
|
|
ssize_t
|
|
|
y;
|
|
|
|
|
|
/*
|
|
|
Initialize Image structure.
|
|
|
*/
|
|
|
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);
|
|
|
if (image->columns == 0)
|
|
|
image->columns=1;
|
|
|
if (image->rows == 0)
|
|
|
image->rows=1;
|
|
|
status=SetImageExtent(image,image->columns,image->rows,exception);
|
|
|
if (status == MagickFalse)
|
|
|
return(DestroyImageList(image));
|
|
|
(void) CopyMagickString(image->filename,image_info->filename,
|
|
|
MagickPathExtent);
|
|
|
if (*image_info->filename == '\0')
|
|
|
pixel=image->background_color;
|
|
|
else
|
|
|
{
|
|
|
status=QueryColorCompliance((char *) image_info->filename,AllCompliance,
|
|
|
&pixel,exception);
|
|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
image=DestroyImage(image);
|
|
|
return((Image *) NULL);
|
|
|
}
|
|
|
}
|
|
|
(void) SetImageColorspace(image,pixel.colorspace,exception);
|
|
|
image->alpha_trait=pixel.alpha_trait;
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
SetPixelViaPixelInfo(image,&pixel,q);
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
|
|
|
static Image *ReadGRADIENTImage(const ImageInfo *image_info,
|
|
|
ExceptionInfo *exception)
|
|
|
{
|
|
|
char
|
|
|
start_color[MagickPathExtent],
|
|
|
stop_color[MagickPathExtent];
|
|
|
|
|
|
Image
|
|
|
*image;
|
|
|
|
|
|
ImageInfo
|
|
|
*read_info;
|
|
|
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
StopInfo
|
|
|
*stops;
|
|
|
|
|
|
/*
|
|
|
Identify start and stop gradient colors.
|
|
|
*/
|
|
|
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);
|
|
|
(void) CopyMagickString(start_color,"white",MagickPathExtent);
|
|
|
(void) CopyMagickString(stop_color,"black",MagickPathExtent);
|
|
|
if (*image_info->filename != '\0')
|
|
|
{
|
|
|
char
|
|
|
*p;
|
|
|
|
|
|
(void) CopyMagickString(start_color,image_info->filename,
|
|
|
MagickPathExtent);
|
|
|
for (p=start_color; (*p != '-') && (*p != '\0'); p++)
|
|
|
if (*p == '(')
|
|
|
{
|
|
|
for (p++; (*p != ')') && (*p != '\0'); p++);
|
|
|
if (*p == '\0')
|
|
|
break;
|
|
|
}
|
|
|
if (*p == '-')
|
|
|
(void) CopyMagickString(stop_color,p+1,MagickPathExtent);
|
|
|
*p='\0';
|
|
|
}
|
|
|
/*
|
|
|
Create base gradient image from start color.
|
|
|
*/
|
|
|
read_info=CloneImageInfo(image_info);
|
|
|
SetImageInfoBlob(read_info,(void *) NULL,0);
|
|
|
(void) CopyMagickString(read_info->filename,start_color,MagickPathExtent);
|
|
|
image=ReadXCImage(read_info,exception);
|
|
|
read_info=DestroyImageInfo(read_info);
|
|
|
if (image == (Image *) NULL)
|
|
|
return((Image *) NULL);
|
|
|
/*
|
|
|
Create gradient stops.
|
|
|
*/
|
|
|
stops=(StopInfo *) AcquireQuantumMemory(2,sizeof(*stops));
|
|
|
if (stops == (StopInfo *) NULL)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
stops[0].offset=0.0;
|
|
|
stops[1].offset=1.0;
|
|
|
status=QueryColorCompliance(start_color,AllCompliance,&stops[0].color,
|
|
|
exception);
|
|
|
if (status != MagickFalse)
|
|
|
status=QueryColorCompliance(stop_color,AllCompliance,&stops[1].color,
|
|
|
exception);
|
|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
stops=(StopInfo *) RelinquishMagickMemory(stops);
|
|
|
image=DestroyImage(image);
|
|
|
return((Image *) NULL);
|
|
|
}
|
|
|
(void) SetImageColorspace(image,stops[0].color.colorspace,exception);
|
|
|
if ((stops[0].color.alpha_trait != UndefinedPixelTrait) ||
|
|
|
(stops[1].color.alpha_trait != UndefinedPixelTrait))
|
|
|
SetImageAlpha(image,TransparentAlpha,exception);
|
|
|
/*
|
|
|
Paint gradient.
|
|
|
*/
|
|
|
status=GradientImage(image,LocaleCompare(image_info->magick,"GRADIENT") == 0 ?
|
|
|
LinearGradient : RadialGradient,PadSpread,stops,2,exception);
|
|
|
stops=(StopInfo *) RelinquishMagickMemory(stops);
|
|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
image=DestroyImageList(image);
|
|
|
return((Image *) NULL);
|
|
|
}
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e g i s t e r G R A D I E N T I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% RegisterGRADIENTImage() adds attributes for the GRADIENT 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 RegisterGRADIENTImage method is:
|
|
|
%
|
|
|
% size_t RegisterGRADIENTImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport size_t RegisterGRADIENTImage(void)
|
|
|
{
|
|
|
MagickInfo
|
|
|
*entry;
|
|
|
|
|
|
entry=AcquireMagickInfo("GRADIENT","GRADIENT",
|
|
|
"Gradual linear passing from one shade to another");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadGRADIENTImage;
|
|
|
entry->flags^=CoderAdjoinFlag;
|
|
|
entry->flags|=CoderRawSupportFlag;
|
|
|
entry->format_type=ImplicitFormatType;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
entry=AcquireMagickInfo("GRADIENT","RADIAL-GRADIENT",
|
|
|
"Gradual radial passing from one shade to another");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadGRADIENTImage;
|
|
|
entry->flags^=CoderAdjoinFlag;
|
|
|
entry->flags|=CoderRawSupportFlag;
|
|
|
entry->format_type=ImplicitFormatType;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
return(MagickImageCoderSignature);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r G R A D I E N T I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% UnregisterGRADIENTImage() removes format registrations made by the
|
|
|
% GRADIENT module from the list of supported formats.
|
|
|
%
|
|
|
% The format of the UnregisterGRADIENTImage method is:
|
|
|
%
|
|
|
% UnregisterGRADIENTImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport void UnregisterGRADIENTImage(void)
|
|
|
{
|
|
|
(void) UnregisterMagickInfo("RADIAL-GRADIENT");
|
|
|
(void) UnregisterMagickInfo("GRADIENT");
|
|
|
}
|
