2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
10 % N N UUU LLLLL LLLLL %
13 % Read/Write Image Of Uniform Color. %
20 % Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
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. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
42 #include "MagickCore/studio.h"
43 #include "MagickCore/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/cache.h"
46 #include "MagickCore/color.h"
47 #include "MagickCore/color-private.h"
48 #include "MagickCore/colorspace-private.h"
49 #include "MagickCore/exception.h"
50 #include "MagickCore/exception-private.h"
51 #include "MagickCore/image.h"
52 #include "MagickCore/image-private.h"
53 #include "MagickCore/list.h"
54 #include "MagickCore/magick.h"
55 #include "MagickCore/memory_.h"
56 #include "MagickCore/pixel-accessor.h"
57 #include "MagickCore/quantum-private.h"
58 #include "MagickCore/static.h"
59 #include "MagickCore/string_.h"
60 #include "MagickCore/module.h"
65 static MagickBooleanType
66 WriteNULLImage(const ImageInfo *,Image *,ExceptionInfo *);
69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
73 % R e a d N U L L I m a g e %
77 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
79 % ReadNULLImage creates a constant image and initializes it to the
80 % X server color as specified by the filename. It allocates the memory
81 % necessary for the new Image structure and returns a pointer to the new
84 % The format of the ReadNULLImage method is:
86 % Image *ReadNULLImage(const ImageInfo *image_info,
87 % ExceptionInfo *exception)
89 % A description of each parameter follows:
91 % o image_info: the image info.
93 % o exception: return any errors or warnings in this structure.
96 static Image *ReadNULLImage(const ImageInfo *image_info,
97 ExceptionInfo *exception)
115 Initialize Image structure.
117 assert(image_info != (const ImageInfo *) NULL);
118 assert(image_info->signature == MagickSignature);
119 if (image_info->debug != MagickFalse)
120 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
121 image_info->filename);
122 assert(exception != (ExceptionInfo *) NULL);
123 assert(exception->signature == MagickSignature);
124 image=AcquireImage(image_info,exception);
125 if (image->columns == 0)
127 if (image->rows == 0)
129 image->matte=MagickTrue;
130 GetPixelInfo(image,&background);
131 background.alpha=(MagickRealType) TransparentAlpha;
132 if (image->colorspace == CMYKColorspace)
133 ConvertRGBToCMYK(&background);
134 for (y=0; y < (ssize_t) image->rows; y++)
136 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
137 if (q == (Quantum *) NULL)
139 for (x=0; x < (ssize_t) image->columns; x++)
141 SetPixelInfoPixel(image,&background,q);
142 q+=GetPixelChannels(image);
144 if (SyncAuthenticPixels(image,exception) == MagickFalse)
147 return(GetFirstImageInList(image));
151 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
155 % R e g i s t e r N U L L I m a g e %
159 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
161 % RegisterNULLImage() adds attributes for the NULL image format to
162 % the list of supported formats. The attributes include the image format
163 % tag, a method to read and/or write the format, whether the format
164 % supports the saving of more than one frame to the same file or blob,
165 % whether the format supports native in-memory I/O, and a brief
166 % description of the format.
168 % The format of the RegisterNULLImage method is:
170 % size_t RegisterNULLImage(void)
173 ModuleExport size_t RegisterNULLImage(void)
178 entry=SetMagickInfo("NULL");
179 entry->decoder=(DecodeImageHandler *) ReadNULLImage;
180 entry->encoder=(EncodeImageHandler *) WriteNULLImage;
181 entry->adjoin=MagickFalse;
182 entry->format_type=ImplicitFormatType;
183 entry->description=ConstantString("Constant image of uniform color");
184 entry->module=ConstantString("NULL");
185 (void) RegisterMagickInfo(entry);
186 return(MagickImageCoderSignature);
190 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
194 % U n r e g i s t e r N U L L I m a g e %
198 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
200 % UnregisterNULLImage() removes format registrations made by the
201 % NULL module from the list of supported formats.
203 % The format of the UnregisterNULLImage method is:
205 % UnregisterNULLImage(void)
208 ModuleExport void UnregisterNULLImage(void)
210 (void) UnregisterMagickInfo("NULL");
214 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
218 % W r i t e N U L L I m a g e %
222 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
224 % WriteNULLImage writes no output at all. It is useful when specified
225 % as an output format when profiling.
227 % The format of the WriteNULLImage method is:
229 % MagickBooleanType WriteNULLImage(const ImageInfo *image_info,
230 % Image *image,ExceptionInfo *exception)
232 % A description of each parameter follows.
234 % o image_info: the image info.
236 % o image: The image.
238 % o exception: return any errors or warnings in this structure.
241 static MagickBooleanType WriteNULLImage(const ImageInfo *image_info,
242 Image *image,ExceptionInfo *exception)
244 assert(image_info != (const ImageInfo *) NULL);
245 assert(image_info->signature == MagickSignature);
246 assert(image != (Image *) NULL);
247 assert(image->signature == MagickSignature);
248 assert(exception != (ExceptionInfo *) NULL);
249 if (image->debug != MagickFalse)
250 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);