60d8e88654
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32876 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
255 lines
9.3 KiB
C++
255 lines
9.3 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: imagxpm.cpp
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// Purpose: wxXPMHandler
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// Author: Vaclav Slavik, Robert Roebling
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// RCS-ID: $Id$
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// Copyright: (c) 2001 Vaclav Slavik
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/*
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This file is partially based on source code of ImageMagick by John Cristy. Its
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license is as follows:
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% X X PPPP M M %
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% X X P P MM MM %
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% X PPPP M M M %
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% X X P M M %
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% X X P M M %
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% %
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% %
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% Read/Write ImageMagick Image Format. %
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% %
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% %
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% Software Design %
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% John Cristy %
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% July 1992 %
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% %
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% %
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% Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
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% to making software imaging solutions freely available. %
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% %
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% Permission is hereby granted, free of charge, to any person obtaining a %
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% copy of this software and associated documentation files ("ImageMagick"), %
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% to deal in ImageMagick without restriction, including without limitation %
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% the rights to use, copy, modify, merge, publish, distribute, sublicense, %
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% and/or sell copies of ImageMagick, and to permit persons to whom the %
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% ImageMagick is furnished to do so, subject to the following conditions: %
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% %
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% The above copyright notice and this permission notice shall be included in %
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% all copies or substantial portions of ImageMagick. %
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% %
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% The software is provided "as is", without warranty of any kind, express or %
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% implied, including but not limited to the warranties of merchantability, %
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% fitness for a particular purpose and noninfringement. In no event shall %
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% ImageMagick Studio be liable for any claim, damages or other liability, %
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% whether in an action of contract, tort or otherwise, arising from, out of %
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% or in connection with ImageMagick or the use or other dealings in %
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% ImageMagick. %
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% %
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% Except as contained in this notice, the name of the ImageMagick Studio %
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% shall not be used in advertising or otherwise to promote the sale, use or %
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% other dealings in ImageMagick without prior written authorization from the %
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% ImageMagick Studio. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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#pragma implementation "imagxpm.h"
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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# pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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# include "wx/defs.h"
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#endif
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#if wxUSE_XPM
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#include "wx/imagxpm.h"
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#include "wx/wfstream.h"
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#include "wx/log.h"
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#include "wx/intl.h"
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#include "wx/utils.h"
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#include "wx/xpmdecod.h"
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IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)
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//-----------------------------------------------------------------------------
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// wxXPMHandler
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//-----------------------------------------------------------------------------
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#if wxUSE_STREAMS
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bool wxXPMHandler::LoadFile(wxImage *image,
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wxInputStream& stream,
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bool WXUNUSED(verbose), int WXUNUSED(index))
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{
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wxXPMDecoder decoder;
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wxImage img = decoder.ReadFile(stream);
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if ( !img.Ok() )
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return false;
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*image = img;
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return true;
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}
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static char hexArray[] = "0123456789ABCDEF";
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static void DecToHex(int dec, char *buf)
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{
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int firstDigit = (int)(dec/16.0);
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int secondDigit = (int)(dec - (firstDigit*16.0));
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buf[0] = hexArray[firstDigit];
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buf[1] = hexArray[secondDigit];
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buf[2] = 0;
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}
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bool wxXPMHandler::SaveFile(wxImage * image,
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wxOutputStream& stream, bool WXUNUSED(verbose))
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{
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wxString tmp;
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char tmp_c;
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// 1. count colours:
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#define MaxCixels 92
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static const char Cixel[MaxCixels+1] =
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" .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
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"lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}|";
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int chars_per_pixel;
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int cols;
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int i, j, k;
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cols = image->CountColours();
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chars_per_pixel = 1;
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for ( k = MaxCixels; cols > k; k *= MaxCixels)
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chars_per_pixel++;
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// 2. write the header:
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wxString sName;
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if ( image->HasOption(wxIMAGE_OPTION_FILENAME) )
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{
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wxSplitPath(image->GetOption(wxIMAGE_OPTION_FILENAME),
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NULL, &sName, NULL);
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sName << wxT("_xpm");
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}
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if ( !sName.IsEmpty() )
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sName = wxString(wxT("/* XPM */\nstatic char *")) + sName;
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else
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sName = wxT("/* XPM */\nstatic char *xpm_data");
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stream.Write( (const char*) sName.ToAscii(), sName.Len() );
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char tmpbuf[200];
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// VS: 200b is safe upper bound for anything produced by sprintf below
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// (<101 bytes the string, neither %i can expand into more than 10 chars)
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sprintf(tmpbuf,
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"[] = {\n"
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"/* columns rows colors chars-per-pixel */\n"
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"\"%i %i %i %i\",\n",
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image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
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stream.Write(tmpbuf, strlen(tmpbuf));
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// 3. create color symbols table:
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wxImageHistogram histogram;
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image->ComputeHistogram(histogram);
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char *symbols_data = new char[cols * (chars_per_pixel+1)];
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char **symbols = new char*[cols];
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// 2a. find mask colour:
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unsigned long mask_key = 0x1000000 /*invalid RGB value*/;
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if (image->HasMask())
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mask_key = (image->GetMaskRed() << 16) |
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(image->GetMaskGreen() << 8) | image->GetMaskBlue();
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// 2b. generate colour table:
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for (wxImageHistogram::iterator entry = histogram.begin();
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entry != histogram.end(); ++entry )
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{
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unsigned long index = entry->second.index;
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symbols[index] = symbols_data + index * (chars_per_pixel+1);
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char *sym = symbols[index];
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k = index % MaxCixels;
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sym[0] = Cixel[k];
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for (j = 1; j < chars_per_pixel; j++)
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{
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k = ((index - k) / MaxCixels) % MaxCixels;
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sym[j] = Cixel[k];
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}
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sym[j] = '\0';
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unsigned long key = entry->first;
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if (key == 0)
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sprintf( tmpbuf, "\"%s c Black\",\n", sym);
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else if (key == mask_key)
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sprintf( tmpbuf, "\"%s c None\",\n", sym);
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else
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{
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char rbuf[3];
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DecToHex( (unsigned char)(key >> 16), rbuf );
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char gbuf[3];
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DecToHex( (unsigned char)(key >> 8), gbuf );
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char bbuf[3];
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DecToHex( (unsigned char)(key), bbuf );
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sprintf( tmpbuf, "\"%s c #%s%s%s\",\n", sym, rbuf, gbuf, bbuf );
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}
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stream.Write( tmpbuf, strlen(tmpbuf) );
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}
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tmp = wxT("/* pixels */\n");
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stream.Write( (const char*) tmp.ToAscii(), tmp.Length() );
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unsigned char *data = image->GetData();
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for (j = 0; j < image->GetHeight(); j++)
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{
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tmp_c = '\"'; stream.Write(&tmp_c, 1);
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for (i = 0; i < image->GetWidth(); i++, data += 3)
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{
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unsigned long key = (data[0] << 16) | (data[1] << 8) | (data[2]);
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stream.Write(symbols[histogram[key].index], chars_per_pixel);
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}
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tmp_c = '\"'; stream.Write(&tmp_c, 1);
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if ( j + 1 < image->GetHeight() )
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{
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tmp_c = ','; stream.Write(&tmp_c, 1);
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}
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tmp_c = '\n'; stream.Write(&tmp_c, 1);
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}
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tmp = wxT("};\n");
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stream.Write( (const char*) tmp.ToAscii(), 3 );
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// Clean up:
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delete[] symbols;
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delete[] symbols_data;
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return true;
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}
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bool wxXPMHandler::DoCanRead(wxInputStream& stream)
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{
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wxXPMDecoder decoder;
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return decoder.CanRead(stream);
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}
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#endif // wxUSE_STREAMS
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#endif // wxUSE_XPM
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