2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read ZX-Spectrum SCREEN$ Format %
20 % Copyright 1999-2011 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/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/pixel-accessor.h"
56 #include "MagickCore/quantum-private.h"
57 #include "MagickCore/static.h"
58 #include "MagickCore/string_.h"
59 #include "MagickCore/module.h"
62 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
66 % R e a d S C R I m a g e %
70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72 % ReadSCRImage() reads a Scitex image file and returns it. It allocates
73 % the memory necessary for the new Image structure and returns a pointer to
76 % The format of the ReadSCRImage method is:
78 % Image *ReadSCRImage(const ImageInfo *image_info,ExceptionInfo *exception)
80 % A description of each parameter follows:
82 % o image_info: the image info.
84 % o exception: return any errors or warnings in this structure.
87 static Image *ReadSCRImage(const ImageInfo *image_info,ExceptionInfo *exception)
109 unsigned char colour_palette[] = {
143 assert(image_info != (const ImageInfo *) NULL);
144 assert(image_info->signature == MagickSignature);
145 if (image_info->debug != MagickFalse)
146 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
147 image_info->filename);
148 assert(exception != (ExceptionInfo *) NULL);
149 assert(exception->signature == MagickSignature);
150 image=AcquireImage(image_info,exception);
151 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
152 if (status == MagickFalse)
154 image=DestroyImageList(image);
155 return((Image *) NULL);
157 image->columns = 256;
159 count=ReadBlob(image,6144,(unsigned char *) zxscr);
161 count=ReadBlob(image,768,(unsigned char *) zxattr);
162 for(zonenr=0;zonenr<3;zonenr++)
164 for(zoneline=0;zoneline<8;zoneline++)
166 for(octetline=0;octetline<8;octetline++)
168 for(octetnr=(zoneline*32);octetnr<((zoneline*32)+32);octetnr++)
170 octet_val = zxscr[octetnr+(256*octetline)+(zonenr*2048)];
171 attr_nr = zxattr[octetnr+(256*zonenr)];
173 pix = (((8*octetnr)-(256*zoneline)));
174 piy = ((octetline+(8*zoneline)+(zonenr*64)));
207 ink = (attrbin[0]+(2*attrbin[1])+(4*attrbin[2]));
208 paper = (attrbin[3]+(2*attrbin[4])+(4*attrbin[5]));
211 if(bright) { ink=ink+8; paper=paper+8; }
215 q=QueueAuthenticPixels(image,pix,piy,1,1,exception);
219 SetPixelRed(image,ScaleCharToQuantum(
220 colour_palette[3*ink]),q);
221 SetPixelGreen(image,ScaleCharToQuantum(
222 colour_palette[1+(3*ink)]),q);
223 SetPixelBlue(image,ScaleCharToQuantum(
224 colour_palette[2+(3*ink)]),q);
226 SetPixelRed(image,ScaleCharToQuantum(
227 colour_palette[3*paper]),q);
228 SetPixelGreen(image,ScaleCharToQuantum(
229 colour_palette[1+(3*paper)]),q);
230 SetPixelBlue(image,ScaleCharToQuantum(
231 colour_palette[2+(3*paper)]),q);
240 (void) CloseBlob(image);
241 return(GetFirstImageInList(image));
245 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
249 % R e g i s t e r S C R I m a g e %
253 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
255 % RegisterSCRImage() adds attributes for the SCR image format to
256 % the list of supported formats. The attributes include the image format
257 % tag, a method to read and/or write the format, whether the format
258 % supports the saving of more than one frame to the same file or blob,
259 % whether the format supports native in-memory I/O, and a brief
260 % description of the format.
262 % The format of the RegisterSCRImage method is:
264 % size_t RegisterSCRImage(void)
267 ModuleExport size_t RegisterSCRImage(void)
272 entry=SetMagickInfo("SCR");
273 entry->decoder=(DecodeImageHandler *) ReadSCRImage;
274 entry->adjoin=MagickFalse;
275 entry->description=ConstantString("ZX-Spectrum SCREEN$");
276 entry->module=ConstantString("SCR");
277 (void) RegisterMagickInfo(entry);
278 return(MagickImageCoderSignature);
282 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
286 % U n r e g i s t e r S C R I m a g e %
290 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
292 % UnregisterSCRImage() removes format registrations made by the
293 % SCR module from the list of supported formats.
295 % The format of the UnregisterSCRImage method is:
297 % UnregisterSCRImage(void)
300 ModuleExport void UnregisterSCRImage(void)
302 (void) UnregisterMagickInfo("SCR");