/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 1999-2007 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 %
% %
% http://www.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 "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/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 colour_palette[] = {
000,000,000,
000,000,192,
192,000,000,
192,000,192,
000,192,000,
000,192,192,
192,192,000,
192,192,192,
000,000,000,
000,000,255,
255,000,000,
255,000,255,
000,255,000,
000,255,255,
255,255,000,
255,255,255
};
Image
*image;
MagickBooleanType
status;
register PixelPacket
*q;
ssize_t
count;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
image->columns = 256;
image->rows = 192;
if (SetImageExtent(image,0,0) == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
count=ReadBlob(image,6144,(unsigned char *) zxscr);
count=ReadBlob(image,768,(unsigned char *) zxattr);
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=SetImagePixels(image,pix,piy,1,1);
if(binar[z])
{
q->red=(Quantum) QuantumRange*(colour_palette[3*ink]);
q->green=(Quantum) QuantumRange*(colour_palette[1+(3*ink)]);
q->blue=(Quantum) QuantumRange*(colour_palette[2+(3*ink)]);
} else {
q->red=(Quantum) QuantumRange*(colour_palette[3*paper]);
q->green=(Quantum) QuantumRange*(colour_palette[1+(3*paper)]);
q->blue=(Quantum) QuantumRange*(colour_palette[2+(3*paper)]);
}
pix++;
}
}
}
}
}
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:
%
% unsigned long RegisterSCRImage(void)
%
*/
ModuleExport unsigned long RegisterSCRImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("SCR");
entry->decoder=(DecodeImageHandler *) ReadSCRImage;
entry->adjoin=MagickFalse;
entry->description=ConstantString("ZX-Spectrum SCREEN$");
entry->module=ConstantString("SCR");
(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");
}
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