/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % SSSSS CCCC RRRR % % SS C R R % % SSS C RRRR % % SS C R R % % SSSSS CCCC R R % % % % % % Read ZX-Spectrum SCREEN$ Format % % % % Software Design % % Catalin Mihaila % % October 2003 % % % % % % Copyright 1999-2021 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/script/license.php % % % % 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/blob.h" #include "MagickCore/blob-private.h" #include "MagickCore/cache.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/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/module.h" /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d S C R I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadSCRImage() reads a Scitex image file and returns it. It allocates % the memory necessary for the new Image structure and returns a pointer to % the new image. % % The format of the ReadSCRImage method is: % % Image *ReadSCRImage(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 *ReadSCRImage(const ImageInfo *image_info,ExceptionInfo *exception) { char zxscr[6144]; char zxattr[768]; int octetnr; int octetline; int zoneline; int zonenr; int octet_val; int attr_nr; int pix; int piy; int binar[8]; int attrbin[8]; int *pbin; int *abin; int z; int one_nr; int ink; int paper; int bright; unsigned char color_palette[] = { 0, 0, 0, 0, 0,192, 192, 0, 0, 192, 0,192, 0,192, 0, 0,192,192, 192,192, 0, 192,192,192, 0, 0, 0, 0, 0,255, 255, 0, 0, 255, 0,255, 0,255, 0, 0,255,255, 255,255, 0, 255,255,255 }; Image *image; MagickBooleanType status; Quantum *q; ssize_t count; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); image=AcquireImage(image_info,exception); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } image->columns = 256; image->rows = 192; status=SetImageExtent(image,image->columns,image->rows,exception); if (status == MagickFalse) return(DestroyImageList(image)); count=ReadBlob(image,6144,(unsigned char *) zxscr); if (count != 6144) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); count=ReadBlob(image,768,(unsigned char *) zxattr); if (count != 768) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); for(zonenr=0;zonenr<3;zonenr++) { for(zoneline=0;zoneline<8;zoneline++) { for(octetline=0;octetline<8;octetline++) { for(octetnr=(zoneline*32);octetnr<((zoneline*32)+32);octetnr++) { octet_val = zxscr[octetnr+(256*octetline)+(zonenr*2048)]; attr_nr = zxattr[octetnr+(256*zonenr)]; pix = (((8*octetnr)-(256*zoneline))); piy = ((octetline+(8*zoneline)+(zonenr*64))); pbin = binar; abin = attrbin; one_nr=1; for(z=0;z<8;z++) { if(octet_val&one_nr) { *pbin = 1; } else { *pbin = 0; } one_nr=one_nr*2; pbin++; } one_nr = 1; for(z=0;z<8;z++) { if(attr_nr&one_nr) { *abin = 1; } else { *abin = 0; } one_nr=one_nr*2; abin++; } ink = (attrbin[0]+(2*attrbin[1])+(4*attrbin[2])); paper = (attrbin[3]+(2*attrbin[4])+(4*attrbin[5])); bright = attrbin[6]; if(bright) { ink=ink+8; paper=paper+8; } for(z=7;z>-1;z--) { q=QueueAuthenticPixels(image,pix,piy,1,1,exception); if (q == (Quantum *) NULL) break; if(binar[z]) { SetPixelRed(image,ScaleCharToQuantum( color_palette[3*ink]),q); SetPixelGreen(image,ScaleCharToQuantum( color_palette[1+(3*ink)]),q); SetPixelBlue(image,ScaleCharToQuantum( color_palette[2+(3*ink)]),q); } else { SetPixelRed(image,ScaleCharToQuantum( color_palette[3*paper]),q); SetPixelGreen(image,ScaleCharToQuantum( color_palette[1+(3*paper)]),q); SetPixelBlue(image,ScaleCharToQuantum( color_palette[2+(3*paper)]),q); } pix++; } } } } } (void) CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r S C R I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterSCRImage() adds attributes for the SCR image format to % the list of supported formats. The attributes 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 RegisterSCRImage method is: % % size_t RegisterSCRImage(void) % */ ModuleExport size_t RegisterSCRImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("SCR","SCR","ZX-Spectrum SCREEN$"); entry->decoder=(DecodeImageHandler *) ReadSCRImage; entry->flags^=CoderAdjoinFlag; (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r S C R I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterSCRImage() removes format registrations made by the % SCR module from the list of supported formats. % % The format of the UnregisterSCRImage method is: % % UnregisterSCRImage(void) % */ ModuleExport void UnregisterSCRImage(void) { (void) UnregisterMagickInfo("SCR"); }