/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%                            M   M  V   V   GGGG                              %

%                            MM MM  V   V  G                                  %

%                            M M M  V   V  G GG                               %

%                            M   M   V V   G   G                              %

%                            M   M    V     GGG                               %

%                                                                             %

%                                                                             %

%                 Read/Write Magick Vector Graphics Metafiles.                %

%                                                                             %

%                              Software Design                                %

%                                   Cristy                                    %

%                                 April 2000                                  %

%                                                                             %

%                                                                             %

%  Copyright @ 1999 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/license/                                         %

%                                                                             %

%  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/artifact.h"

#include "MagickCore/blob.h"

#include "MagickCore/blob-private.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/module.h"

#include "MagickCore/property.h"

#include "MagickCore/quantum-private.h"

#include "MagickCore/static.h"

#include "MagickCore/string_.h"

#include "MagickCore/string-private.h"

/*

  Forward declarations.

*/

static MagickBooleanType

  WriteMVGImage(const ImageInfo *,Image *,ExceptionInfo *);

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   I s M V G                                                                 %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  IsMVG() returns MagickTrue if the image format type, identified by the

%  magick string, is MVG.

%

%  The format of the IsMVG method is:

%

%      MagickBooleanType IsMVG(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 IsMVG(const unsigned char *magick,const size_t length)

{

  if (length < 20)

    return(MagickFalse);

  if (LocaleNCompare((const char *) magick,"push graphic-context",20) == 0)

    return(MagickTrue);

  return(MagickFalse);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e a d M V G I m a g e                                                   %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  ReadMVGImage creates a gradient image and initializes it to

%  the X server 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 ReadMVGImage method is:

%

%      Image *ReadMVGImage(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 *ReadMVGImage(const ImageInfo *image_info,ExceptionInfo *exception)

{

  DrawInfo

    *draw_info;

  Image

    *image;

  MagickBooleanType

    status;

  /*

    Open image.

  */

  assert(image_info != (const ImageInfo *) NULL);

  assert(image_info->signature == MagickCoreSignature);

  assert(exception != (ExceptionInfo *) NULL);

  assert(exception->signature == MagickCoreSignature);

  if (IsEventLogging() != MagickFalse)

    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",

      image_info->filename);

  image=AcquireImage(image_info,exception);

  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);

  if (status == MagickFalse)

    {

      image=DestroyImageList(image);

      return((Image *) NULL);

    }

  if ((image->columns == 0) || (image->rows == 0))

    {

      char

        primitive[MagickPathExtent];

      char

        *p;

      SegmentInfo

        bounds;

      /*

        Determine size of image canvas.

      */

      (void) memset(&bounds,0,sizeof(bounds));

      while (ReadBlobString(image,primitive) != (char *) NULL)

      {

        int

          count;

        for (p=primitive; (*p == ' ') || (*p == '\t'); p++) ;

        count=MagickSscanf(p,"viewbox %lf %lf %lf %lf",&bounds.x1,&bounds.y1,

          &bounds.x2,&bounds.y2);

        if (count != 4)

          continue;

        image->columns=CastDoubleToSizeT(floor((bounds.x2-bounds.x1)+0.5));

        image->rows=CastDoubleToSizeT(floor((bounds.y2-bounds.y1)+0.5));

        break;

      }

    }

  if ((image->columns == 0) || (image->rows == 0))

    ThrowReaderException(OptionError,"MustSpecifyImageSize");

  draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);

  if (draw_info->density != (char *) NULL)

    draw_info->density=DestroyString(draw_info->density);

  draw_info->affine.sx=image->resolution.x == 0.0 ? 1.0 : image->resolution.x/

    96.0;

  draw_info->affine.sy=image->resolution.y == 0.0 ? 1.0 : image->resolution.y/

    96.0;

  image->columns=CastDoubleToSizeT(draw_info->affine.sx*image->columns);

  image->rows=CastDoubleToSizeT(draw_info->affine.sy*image->rows);

  status=SetImageExtent(image,image->columns,image->rows,exception);

  if (status == MagickFalse)

    {

      draw_info=DestroyDrawInfo(draw_info);

      return(DestroyImageList(image));

    }

  if (SetImageBackgroundColor(image,exception) == MagickFalse)

    {

      draw_info=DestroyDrawInfo(draw_info);

      return(DestroyImageList(image));

    }

  /*

    Render drawing.

  */

  if (GetBlobStreamData(image) == (unsigned char *) NULL)

    draw_info->primitive=FileToString(image->filename,~0UL,exception);

  else

    {

      MagickSizeType

        length;

      length=GetBlobSize(image);

      if (length == (MagickSizeType) ((size_t) length))

        {

          draw_info->primitive=(char *) AcquireQuantumMemory(1,(size_t) length+1);

          if (draw_info->primitive != (char *) NULL)

            {

              memcpy(draw_info->primitive,GetBlobStreamData(image),(size_t)

                length);

              draw_info->primitive[length]='\0';

            }

         }

     }

  if (draw_info->primitive == (char *) NULL)

    {

      draw_info=DestroyDrawInfo(draw_info);

      return(DestroyImageList(image));

    }

  if (*draw_info->primitive == '@')

    {

      draw_info=DestroyDrawInfo(draw_info);

      ThrowReaderException(CorruptImageError,"ImproperImageHeader");

    }

  (void) DrawImage(image,draw_info,exception);

  (void) SetImageArtifact(image,"mvg:vector-graphics",draw_info->primitive);

  draw_info=DestroyDrawInfo(draw_info);

  if (CloseBlob(image) == MagickFalse)

    status=MagickFalse;

  if (status == MagickFalse)

    return(DestroyImageList(image));

  return(GetFirstImageInList(image));

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e g i s t e r M V G I m a g e                                           %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  RegisterMVGImage() adds properties for the MVG image format

%  to the list of supported formats.  The properties 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 RegisterMVGImage method is:

%

%      size_t RegisterMVGImage(void)

%

*/

ModuleExport size_t RegisterMVGImage(void)

{

  MagickInfo

    *entry;

  entry=AcquireMagickInfo("MVG","MVG","Magick Vector Graphics");

  entry->decoder=(DecodeImageHandler *) ReadMVGImage;

  entry->encoder=(EncodeImageHandler *) WriteMVGImage;

  entry->magick=(IsImageFormatHandler *) IsMVG;

  entry->format_type=ImplicitFormatType;

  entry->flags|=CoderDecoderSeekableStreamFlag;

  entry->flags^=CoderAdjoinFlag;

  (void) RegisterMagickInfo(entry);

  return(MagickImageCoderSignature);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   U n r e g i s t e r M V G I m a g e                                       %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  UnregisterMVGImage() removes format registrations made by the

%  MVG module from the list of supported formats.

%

%  The format of the UnregisterMVGImage method is:

%

%      UnregisterMVGImage(void)

%

*/

ModuleExport void UnregisterMVGImage(void)

{

  (void) UnregisterMagickInfo("MVG");

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   W r i t e M V G I m a g e                                                 %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  WriteMVGImage() writes an image to a file in MVG image format.

%

%  The format of the WriteMVGImage method is:

%

%      MagickBooleanType WriteMVGImage(const ImageInfo *image_info,

%        Image *image,ExceptionInfo *exception)

%

%  A description of each parameter follows.

%

%    o image_info: the image info.

%

%    o image:  The image.

%

%    o exception: return any errors or warnings in this structure.

%

*/

static MagickBooleanType WriteMVGImage(const ImageInfo *image_info,Image *image,

  ExceptionInfo *exception)

{

  const char

    *value;

  MagickBooleanType

    status;

  /*

    Open output image file.

  */

  assert(image_info != (const ImageInfo *) NULL);

  assert(image_info->signature == MagickCoreSignature);

  assert(image != (Image *) NULL);

  assert(image->signature == MagickCoreSignature);

  if (IsEventLogging() != MagickFalse)

    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);

  value=GetImageArtifact(image,"mvg:vector-graphics");

  if (value == (const char *) NULL)

    ThrowWriterException(OptionError,"NoImageVectorGraphics");

  status=OpenBlob(image_info,image,WriteBlobMode,exception);

  if (status == MagickFalse)

    return(status);

  (void) WriteBlob(image,strlen(value),(const unsigned char *) value);

  if (CloseBlob(image) == MagickFalse)

    status=MagickFalse;

  return(status);

}