2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
10 % N N UUU LLLLL LLLLL %
13 % Read/Write Image Of Uniform Color. %
20 % Copyright 1999-2014 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 ConformPixelInfo(image,&image->background_color,&background,exception);
130 image->alpha_trait=BlendPixelTrait;
131 background.alpha=(double) TransparentAlpha;
132 for (y=0; y < (ssize_t) image->rows; y++)
134 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
135 if (q == (Quantum *) NULL)
137 for (x=0; x < (ssize_t) image->columns; x++)
139 SetPixelInfoPixel(image,&background,q);
140 q+=GetPixelChannels(image);
142 if (SyncAuthenticPixels(image,exception) == MagickFalse)
145 return(GetFirstImageInList(image));
149 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
153 % R e g i s t e r N U L L I m a g e %
157 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
159 % RegisterNULLImage() adds attributes for the NULL image format to
160 % the list of supported formats. The attributes include the image format
161 % tag, a method to read and/or write the format, whether the format
162 % supports the saving of more than one frame to the same file or blob,
163 % whether the format supports native in-memory I/O, and a brief
164 % description of the format.
166 % The format of the RegisterNULLImage method is:
168 % size_t RegisterNULLImage(void)
171 ModuleExport size_t RegisterNULLImage(void)
176 entry=SetMagickInfo("NULL");
177 entry->decoder=(DecodeImageHandler *) ReadNULLImage;
178 entry->encoder=(EncodeImageHandler *) WriteNULLImage;
179 entry->adjoin=MagickFalse;
180 entry->format_type=ImplicitFormatType;
181 entry->description=ConstantString("Constant image of uniform color");
182 entry->module=ConstantString("NULL");
183 (void) RegisterMagickInfo(entry);
184 return(MagickImageCoderSignature);
188 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
192 % U n r e g i s t e r N U L L I m a g e %
196 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
198 % UnregisterNULLImage() removes format registrations made by the
199 % NULL module from the list of supported formats.
201 % The format of the UnregisterNULLImage method is:
203 % UnregisterNULLImage(void)
206 ModuleExport void UnregisterNULLImage(void)
208 (void) UnregisterMagickInfo("NULL");
212 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
216 % W r i t e N U L L I m a g e %
220 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
222 % WriteNULLImage writes no output at all. It is useful when specified
223 % as an output format when profiling.
225 % The format of the WriteNULLImage method is:
227 % MagickBooleanType WriteNULLImage(const ImageInfo *image_info,
228 % Image *image,ExceptionInfo *exception)
230 % A description of each parameter follows.
232 % o image_info: the image info.
234 % o image: The image.
236 % o exception: return any errors or warnings in this structure.
239 static MagickBooleanType WriteNULLImage(const ImageInfo *image_info,
240 Image *image,ExceptionInfo *exception)
242 assert(image_info != (const ImageInfo *) NULL);
243 assert(image_info->signature == MagickSignature);
244 assert(image != (Image *) NULL);
245 assert(image->signature == MagickSignature);
246 assert(exception != (ExceptionInfo *) NULL);
247 if (image->debug != MagickFalse)
248 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);