granicus.if.org Git - imagemagick/blob - coders/tile.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                        TTTTT  IIIII  L      EEEEE                           %
   7 %                          T      I    L      E                               %
   8 %                          T      I    L      EEE                             %
   9 %                          T      I    L      E                               %
  10 %                          T    IIIII  LLLLL  EEEEE                           %
  11 %                                                                             %
  12 %                                                                             %
  13 %                     Return A Tiled Image Using Texture.                     %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2017 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "MagickCore/studio.h"
  43 #include "MagickCore/blob.h"
  44 #include "MagickCore/blob-private.h"
  45 #include "MagickCore/constitute.h"
  46 #include "MagickCore/exception.h"
  47 #include "MagickCore/exception-private.h"
  48 #include "MagickCore/image.h"
  49 #include "MagickCore/image-private.h"
  50 #include "MagickCore/list.h"
  51 #include "MagickCore/magick.h"
  52 #include "MagickCore/memory_.h"
  53 #include "MagickCore/monitor.h"
  54 #include "MagickCore/monitor-private.h"
  55 #include "MagickCore/quantum-private.h"
  56 #include "MagickCore/static.h"
  57 #include "MagickCore/string_.h"
  58 #include "MagickCore/module.h"
  59 \f
  60 /*
  61 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  62 %                                                                             %
  63 %                                                                             %
  64 %                                                                             %
  65 %   R e a d T I L E I m a g e                                                 %
  66 %                                                                             %
  67 %                                                                             %
  68 %                                                                             %
  69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  70 %
  71 %  ReadTILEImage tiles a texture on an image.  It allocates the
  72 %  memory necessary for the new Image structure and returns a pointer to the
  73 %  new image.
  74 %
  75 %  The format of the ReadTILEImage method is:
  76 %
  77 %      Image *ReadTILEImage(const ImageInfo *image_info,
  78 %        ExceptionInfo *exception)
  79 %
  80 %  A description of each parameter follows:
  81 %
  82 %    o image_info: the image info.
  83 %
  84 %    o exception: return any errors or warnings in this structure.
  85 %
  86 */
  87 static Image *ReadTILEImage(const ImageInfo *image_info,
  88   ExceptionInfo *exception)
  89 {
  90   Image
  91     *image,
  92     *tile_image;
  93
  94   ImageInfo
  95     *read_info;
  96
  97   MagickBooleanType
  98     status;
  99
 100   /*
 101     Initialize Image structure.
 102   */
 103   assert(image_info != (const ImageInfo *) NULL);
 104   assert(image_info->signature == MagickCoreSignature);
 105   if (image_info->debug != MagickFalse)
 106     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 107       image_info->filename);
 108   assert(exception != (ExceptionInfo *) NULL);
 109   assert(exception->signature == MagickCoreSignature);
 110   read_info=CloneImageInfo(image_info);
 111   SetImageInfoBlob(read_info,(void *) NULL,0);
 112   *read_info->magick='\0';
 113   tile_image=ReadImage(read_info,exception);
 114   read_info=DestroyImageInfo(read_info);
 115   if (tile_image == (Image *) NULL)
 116     return((Image *) NULL);
 117   image=AcquireImage(image_info,exception);
 118   if ((image->columns == 0) || (image->rows == 0))
 119     ThrowReaderException(OptionError,"MustSpecifyImageSize");
 120   if (*image_info->filename == '\0')
 121     ThrowReaderException(OptionError,"MustSpecifyAnImageName");
 122   status=SetImageExtent(image,image->columns,image->rows,exception);
 123   if (status == MagickFalse)
 124     return(DestroyImageList(image));
 125   image->colorspace=tile_image->colorspace;
 126   image->alpha_trait=tile_image->alpha_trait;
 127   if (image->alpha_trait != UndefinedPixelTrait)
 128     (void) SetImageBackgroundColor(image,exception);
 129   (void) CopyMagickString(image->filename,image_info->filename,MagickPathExtent);
 130   if (LocaleCompare(tile_image->magick,"PATTERN") == 0)
 131     {
 132       tile_image->tile_offset.x=0;
 133       tile_image->tile_offset.y=0;
 134     }
 135   (void) TextureImage(image,tile_image,exception);
 136   tile_image=DestroyImage(tile_image);
 137   if (image->colorspace == GRAYColorspace)
 138     image->type=GrayscaleType;
 139   return(GetFirstImageInList(image));
 140 }
 141 \f
 142 /*
 143 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 144 %                                                                             %
 145 %                                                                             %
 146 %                                                                             %
 147 %   R e g i s t e r T I L E I m a g e                                         %
 148 %                                                                             %
 149 %                                                                             %
 150 %                                                                             %
 151 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 152 %
 153 %  RegisterTILEImage() adds attributes for the TILE image format to
 154 %  the list of supported formats.  The attributes include the image format
 155 %  tag, a method to read and/or write the format, whether the format
 156 %  supports the saving of more than one frame to the same file or blob,
 157 %  whether the format supports native in-memory I/O, and a brief
 158 %  description of the format.
 159 %
 160 %  The format of the RegisterTILEImage method is:
 161 %
 162 %      size_t RegisterTILEImage(void)
 163 %
 164 */
 165 ModuleExport size_t RegisterTILEImage(void)
 166 {
 167   MagickInfo
 168     *entry;
 169
 170   entry=AcquireMagickInfo("TILE","TILE","Tile image with a texture");
 171   entry->decoder=(DecodeImageHandler *) ReadTILEImage;
 172   entry->flags|=CoderRawSupportFlag;
 173   entry->flags|=CoderEndianSupportFlag;
 174   entry->format_type=ImplicitFormatType;
 175   (void) RegisterMagickInfo(entry);
 176   return(MagickImageCoderSignature);
 177 }
 178 \f
 179 /*
 180 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 181 %                                                                             %
 182 %                                                                             %
 183 %                                                                             %
 184 %   U n r e g i s t e r T I L E I m a g e                                     %
 185 %                                                                             %
 186 %                                                                             %
 187 %                                                                             %
 188 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 189 %
 190 %  UnregisterTILEImage() removes format registrations made by the
 191 %  TILE module from the list of supported formats.
 192 %
 193 %  The format of the UnregisterTILEImage method is:
 194 %
 195 %      UnregisterTILEImage(void)
 196 %
 197 */
 198 ModuleExport void UnregisterTILEImage(void)
 199 {
 200   (void) UnregisterMagickInfo("TILE");
 201 }