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/* |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% % |
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% % |
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% % |
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% SSSSS CCCC RRRR % |
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% SS C R R % |
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% SSS C RRRR % |
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% SS C R R % |
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% SSSSS CCCC R R % |
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% % |
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% % |
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% Read ZX-Spectrum SCREEN$ Format % |
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% % |
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% Software Design % |
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% Catalin Mihaila % |
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% October 2003 % |
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% % |
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% % |
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% Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization % |
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% dedicated to making software imaging solutions freely available. % |
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% % |
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% You may not use this file except in compliance with the License. You may % |
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% obtain a copy of the License at % |
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% % |
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% https://imagemagick.org/script/license.php % |
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% % |
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% Unless required by applicable law or agreed to in writing, software % |
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% distributed under the License is distributed on an "AS IS" BASIS, % |
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
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% See the License for the specific language governing permissions and % |
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% limitations under the License. % |
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% % |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% |
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% |
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*/ |
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/* |
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Include declarations. |
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*/ |
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#include "MagickCore/studio.h" |
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#include "MagickCore/blob.h" |
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#include "MagickCore/blob-private.h" |
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#include "MagickCore/cache.h" |
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#include "MagickCore/exception.h" |
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#include "MagickCore/exception-private.h" |
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#include "MagickCore/image.h" |
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#include "MagickCore/image-private.h" |
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#include "MagickCore/list.h" |
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#include "MagickCore/magick.h" |
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#include "MagickCore/memory_.h" |
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#include "MagickCore/monitor.h" |
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#include "MagickCore/monitor-private.h" |
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#include "MagickCore/pixel-accessor.h" |
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#include "MagickCore/quantum-private.h" |
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#include "MagickCore/static.h" |
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#include "MagickCore/string_.h" |
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#include "MagickCore/module.h" |
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/* |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% % |
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% % |
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% % |
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% R e a d S C R I m a g e % |
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% % |
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% % |
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% % |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% |
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% ReadSCRImage() reads a Scitex image file and returns it. It allocates |
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% the memory necessary for the new Image structure and returns a pointer to |
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% the new image. |
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% |
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% The format of the ReadSCRImage method is: |
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% |
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% Image *ReadSCRImage(const ImageInfo *image_info,ExceptionInfo *exception) |
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% |
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% A description of each parameter follows: |
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% |
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% o image_info: the image info. |
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% |
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% o exception: return any errors or warnings in this structure. |
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% |
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*/ |
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static Image *ReadSCRImage(const ImageInfo *image_info,ExceptionInfo *exception) |
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{ |
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char zxscr[6144]; |
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char zxattr[768]; |
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int octetnr; |
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int octetline; |
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int zoneline; |
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int zonenr; |
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int octet_val; |
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int attr_nr; |
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int pix; |
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int piy; |
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int binar[8]; |
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int attrbin[8]; |
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int *pbin; |
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int *abin; |
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int z; |
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int one_nr; |
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int ink; |
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int paper; |
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int bright; |
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unsigned char colour_palette[] = { |
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0, 0, 0, |
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0, 0,192, |
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192, 0, 0, |
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192, 0,192, |
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0,192, 0, |
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0,192,192, |
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192,192, 0, |
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192,192,192, |
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0, 0, 0, |
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0, 0,255, |
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255, 0, 0, |
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255, 0,255, |
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0,255, 0, |
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0,255,255, |
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255,255, 0, |
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255,255,255 |
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}; |
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Image |
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*image; |
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MagickBooleanType |
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status; |
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register Quantum |
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*q; |
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ssize_t |
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count; |
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/* |
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Open image file. |
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*/ |
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assert(image_info != (const ImageInfo *) NULL); |
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assert(image_info->signature == MagickCoreSignature); |
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if (image_info->debug != MagickFalse) |
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
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image_info->filename); |
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assert(exception != (ExceptionInfo *) NULL); |
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assert(exception->signature == MagickCoreSignature); |
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image=AcquireImage(image_info,exception); |
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
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if (status == MagickFalse) |
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{ |
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image=DestroyImageList(image); |
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return((Image *) NULL); |
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} |
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image->columns = 256; |
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image->rows = 192; |
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status=SetImageExtent(image,image->columns,image->rows,exception); |
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if (status == MagickFalse) |
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return(DestroyImageList(image)); |
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count=ReadBlob(image,6144,(unsigned char *) zxscr); |
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if (count != 6144) |
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ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
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count=ReadBlob(image,768,(unsigned char *) zxattr); |
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if (count != 768) |
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ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
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for(zonenr=0;zonenr<3;zonenr++) |
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{ |
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for(zoneline=0;zoneline<8;zoneline++) |
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{ |
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for(octetline=0;octetline<8;octetline++) |
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{ |
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for(octetnr=(zoneline*32);octetnr<((zoneline*32)+32);octetnr++) |
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{ |
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octet_val = zxscr[octetnr+(256*octetline)+(zonenr*2048)]; |
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attr_nr = zxattr[octetnr+(256*zonenr)]; |
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pix = (((8*octetnr)-(256*zoneline))); |
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piy = ((octetline+(8*zoneline)+(zonenr*64))); |
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pbin = binar; |
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abin = attrbin; |
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one_nr=1; |
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for(z=0;z<8;z++) |
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{ |
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if(octet_val&one_nr) |
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{ |
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*pbin = 1; |
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} else { |
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*pbin = 0; |
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} |
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one_nr=one_nr*2; |
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pbin++; |
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} |
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one_nr = 1; |
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for(z=0;z<8;z++) |
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{ |
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if(attr_nr&one_nr) |
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{ |
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*abin = 1; |
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} else { |
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*abin = 0; |
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} |
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one_nr=one_nr*2; |
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abin++; |
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} |
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ink = (attrbin[0]+(2*attrbin[1])+(4*attrbin[2])); |
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paper = (attrbin[3]+(2*attrbin[4])+(4*attrbin[5])); |
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bright = attrbin[6]; |
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if(bright) { ink=ink+8; paper=paper+8; } |
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for(z=7;z>-1;z--) |
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{ |
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q=QueueAuthenticPixels(image,pix,piy,1,1,exception); |
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if (q == (Quantum *) NULL) |
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break; |
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if(binar[z]) |
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{ |
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SetPixelRed(image,ScaleCharToQuantum( |
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colour_palette[3*ink]),q); |
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SetPixelGreen(image,ScaleCharToQuantum( |
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colour_palette[1+(3*ink)]),q); |
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SetPixelBlue(image,ScaleCharToQuantum( |
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colour_palette[2+(3*ink)]),q); |
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} else { |
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SetPixelRed(image,ScaleCharToQuantum( |
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colour_palette[3*paper]),q); |
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SetPixelGreen(image,ScaleCharToQuantum( |
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colour_palette[1+(3*paper)]),q); |
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SetPixelBlue(image,ScaleCharToQuantum( |
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colour_palette[2+(3*paper)]),q); |
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} |
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pix++; |
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} |
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} |
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} |
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} |
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} |
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(void) CloseBlob(image); |
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return(GetFirstImageInList(image)); |
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} |
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/* |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% % |
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% % |
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% % |
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% R e g i s t e r S C R I m a g e % |
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% % |
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% % |
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% % |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% |
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% RegisterSCRImage() adds attributes for the SCR image format to |
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% the list of supported formats. The attributes include the image format |
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% tag, a method to read and/or write the format, whether the format |
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% supports the saving of more than one frame to the same file or blob, |
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% whether the format supports native in-memory I/O, and a brief |
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% description of the format. |
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% |
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% The format of the RegisterSCRImage method is: |
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% |
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% size_t RegisterSCRImage(void) |
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% |
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*/ |
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ModuleExport size_t RegisterSCRImage(void) |
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{ |
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MagickInfo |
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*entry; |
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entry=AcquireMagickInfo("SCR","SCR","ZX-Spectrum SCREEN$"); |
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entry->decoder=(DecodeImageHandler *) ReadSCRImage; |
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entry->flags^=CoderAdjoinFlag; |
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(void) RegisterMagickInfo(entry); |
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return(MagickImageCoderSignature); |
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} |
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/* |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% % |
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% % |
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% % |
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% U n r e g i s t e r S C R I m a g e % |
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% % |
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% % |
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% % |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% |
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% UnregisterSCRImage() removes format registrations made by the |
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% SCR module from the list of supported formats. |
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% |
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% The format of the UnregisterSCRImage method is: |
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% |
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% UnregisterSCRImage(void) |
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% |
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*/ |
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ModuleExport void UnregisterSCRImage(void) |
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{ |
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(void) UnregisterMagickInfo("SCR"); |
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}
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