| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 1999-2020 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 colour_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; |
| |
| register 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( |
| colour_palette[3*ink]),q); |
| SetPixelGreen(image,ScaleCharToQuantum( |
| colour_palette[1+(3*ink)]),q); |
| SetPixelBlue(image,ScaleCharToQuantum( |
| colour_palette[2+(3*ink)]),q); |
| } else { |
| SetPixelRed(image,ScaleCharToQuantum( |
| colour_palette[3*paper]),q); |
| SetPixelGreen(image,ScaleCharToQuantum( |
| colour_palette[1+(3*paper)]),q); |
| SetPixelBlue(image,ScaleCharToQuantum( |
| colour_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"); |
| } |
