src/common/imagxpm.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/common/imagxpm.cpp
// Purpose:     wxXPMHandler
// Author:      Vaclav Slavik, Robert Roebling
// RCS-ID:      $Id$
// Copyright:   (c) 2001 Vaclav Slavik
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

/*

This file is partially based on source code of ImageMagick by John Cristy. Its
license is as follows:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%                            X   X  PPPP   M   M                              %
%                             X X   P   P  MM MM                              %
%                              X    PPPP   M M M                              %
%                             X X   P      M   M                              %
%                            X   X  P      M   M                              %
%                                                                             %
%                                                                             %
%                    Read/Write ImageMagick Image Format.                     %
%                                                                             %
%                                                                             %
%                              Software Design                                %
%                                John Cristy                                  %
%                                 July 1992                                   %
%                                                                             %
%                                                                             %
%  Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
%  to making software imaging solutions freely available.                     %
%                                                                             %
%  Permission is hereby granted, free of charge, to any person obtaining a    %
%  copy of this software and associated documentation files ("ImageMagick"),  %
%  to deal in ImageMagick without restriction, including without limitation   %
%  the rights to use, copy, modify, merge, publish, distribute, sublicense,   %
%  and/or sell copies of ImageMagick, and to permit persons to whom the       %
%  ImageMagick is furnished to do so, subject to the following conditions:    %
%                                                                             %
%  The above copyright notice and this permission notice shall be included in %
%  all copies or substantial portions of ImageMagick.                         %
%                                                                             %
%  The software is provided "as is", without warranty of any kind, express or %
%  implied, including but not limited to the warranties of merchantability,   %
%  fitness for a particular purpose and noninfringement.  In no event shall   %
%  ImageMagick Studio be liable for any claim, damages or other liability,    %
%  whether in an action of contract, tort or otherwise, arising from, out of  %
%  or in connection with ImageMagick or the use or other dealings in          %
%  ImageMagick.                                                               %
%                                                                             %
%  Except as contained in this notice, the name of the ImageMagick Studio     %
%  shall not be used in advertising or otherwise to promote the sale, use or  %
%  other dealings in ImageMagick without prior written authorization from the %
%  ImageMagick Studio.                                                        %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_XPM

#ifndef WX_PRECOMP
    #include "wx/log.h"
    #include "wx/intl.h"
    #include "wx/utils.h"
#endif

#include "wx/imagxpm.h"
#include "wx/wfstream.h"
#include "wx/xpmdecod.h"

IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)

//-----------------------------------------------------------------------------
// wxXPMHandler
//-----------------------------------------------------------------------------

#if wxUSE_STREAMS

bool wxXPMHandler::LoadFile(wxImage *image,
                            wxInputStream& stream,
                            bool WXUNUSED(verbose), int WXUNUSED(index))
{
    wxXPMDecoder decoder;

    wxImage img = decoder.ReadFile(stream);
    if ( !img.Ok() )
        return false;
    *image = img;
    return true;
}


static char hexArray[] = "0123456789ABCDEF";

static void DecToHex(int dec, char *buf)
{
    int firstDigit = (int)(dec/16.0);
    int secondDigit = (int)(dec - (firstDigit*16.0));
    buf[0] = hexArray[firstDigit];
    buf[1] = hexArray[secondDigit];
    buf[2] = 0;
}


bool wxXPMHandler::SaveFile(wxImage * image,
                            wxOutputStream& stream, bool WXUNUSED(verbose))
{
    wxString tmp;
    char tmp_c;

    // 1. count colours:
    #define MaxCixels  92
    static const char Cixel[MaxCixels+1] =
                         " .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
                         "lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}|";
    int chars_per_pixel;
    int cols;
    int i, j, k;

    cols = image->CountColours();
    chars_per_pixel = 1;
    for ( k = MaxCixels; cols > k; k *= MaxCixels)
        chars_per_pixel++;

    // 2. write the header:
    wxString sName;
    if ( image->HasOption(wxIMAGE_OPTION_FILENAME) )
    {
        wxSplitPath(image->GetOption(wxIMAGE_OPTION_FILENAME),
                    NULL, &sName, NULL);
        sName << wxT("_xpm");
    }

    if ( !sName.empty() )
        sName = wxString(wxT("/* XPM */\nstatic char *")) + sName;
    else
        sName = wxT("/* XPM */\nstatic char *xpm_data");
    stream.Write( (const char*) sName.ToAscii(), sName.Len() );

    char tmpbuf[200];
    // VS: 200b is safe upper bound for anything produced by sprintf below
    //     (<101 bytes the string, neither %i can expand into more than 10 chars)
    sprintf(tmpbuf,
               "[] = {\n"
               "/* columns rows colors chars-per-pixel */\n"
               "\"%i %i %i %i\",\n",
               image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
    stream.Write(tmpbuf, strlen(tmpbuf));

    // 3. create color symbols table:
    wxImageHistogram histogram;
    image->ComputeHistogram(histogram);

    char *symbols_data = new char[cols * (chars_per_pixel+1)];
    char **symbols = new char*[cols];

    // 2a. find mask colour:
    unsigned long mask_key = 0x1000000 /*invalid RGB value*/;
    if (image->HasMask())
        mask_key = (image->GetMaskRed() << 16) |
                   (image->GetMaskGreen() << 8) | image->GetMaskBlue();

    // 2b. generate colour table:
    for (wxImageHistogram::iterator entry = histogram.begin();
         entry != histogram.end(); ++entry )
    {
        unsigned long index = entry->second.index;
        symbols[index] = symbols_data + index * (chars_per_pixel+1);
        char *sym = symbols[index];

        k = index % MaxCixels;
        sym[0] = Cixel[k];
        for (j = 1; j < chars_per_pixel; j++)
        {
            k = ((index - k) / MaxCixels) % MaxCixels;
            sym[j] = Cixel[k];
        }
        sym[j] = '\0';

        unsigned long key = entry->first;

        if (key == 0)
            sprintf( tmpbuf, "\"%s c Black\",\n", sym);
        else if (key == mask_key)
            sprintf( tmpbuf, "\"%s c None\",\n", sym);
        else
        {
            char rbuf[3];
            DecToHex( (unsigned char)(key >> 16), rbuf );
            char gbuf[3];
            DecToHex( (unsigned char)(key >> 8), gbuf );
            char bbuf[3];
            DecToHex( (unsigned char)(key), bbuf );
            sprintf( tmpbuf, "\"%s c #%s%s%s\",\n", sym, rbuf, gbuf, bbuf );
        }
        stream.Write( tmpbuf, strlen(tmpbuf) );
    }

    tmp = wxT("/* pixels */\n");
    stream.Write( (const char*) tmp.ToAscii(), tmp.length() );

    unsigned char *data = image->GetData();
    for (j = 0; j < image->GetHeight(); j++)
    {
        tmp_c = '\"'; stream.Write(&tmp_c, 1);
        for (i = 0; i < image->GetWidth(); i++, data += 3)
        {
            unsigned long key = (data[0] << 16) | (data[1] << 8) | (data[2]);
            stream.Write(symbols[histogram[key].index], chars_per_pixel);
        }
        tmp_c = '\"'; stream.Write(&tmp_c, 1);
        if ( j + 1 < image->GetHeight() )
        {
            tmp_c = ','; stream.Write(&tmp_c, 1);
        }
        tmp_c = '\n'; stream.Write(&tmp_c, 1);
    }
    tmp = wxT("};\n");
    stream.Write( (const char*) tmp.ToAscii(), 3 );

    // Clean up:
    delete[] symbols;
    delete[] symbols_data;

    return true;
}

bool wxXPMHandler::DoCanRead(wxInputStream& stream)
{
    wxXPMDecoder decoder;
    return decoder.CanRead(stream);
}

#endif  // wxUSE_STREAMS

#endif // wxUSE_XPM
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/common/imagxpm.cpp
	3	// Purpose: wxXPMHandler
	4	// Author: Vaclav Slavik, Robert Roebling
	5	// RCS-ID: $Id$
	6	// Copyright: (c) 2001 Vaclav Slavik
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	/*
	11
	12	This file is partially based on source code of ImageMagick by John Cristy. Its
	13	license is as follows:
	14
	15	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	16	% %
	17	% %
	18	% %
	19	% X X PPPP M M %
	20	% X X P P MM MM %
	21	% X PPPP M M M %
	22	% X X P M M %
	23	% X X P M M %
	24	% %
	25	% %
	26	% Read/Write ImageMagick Image Format. %
	27	% %
	28	% %
	29	% Software Design %
	30	% John Cristy %
	31	% July 1992 %
	32	% %
	33	% %
	34	% Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
	35	% to making software imaging solutions freely available. %
	36	% %
	37	% Permission is hereby granted, free of charge, to any person obtaining a %
	38	% copy of this software and associated documentation files ("ImageMagick"), %
	39	% to deal in ImageMagick without restriction, including without limitation %
	40	% the rights to use, copy, modify, merge, publish, distribute, sublicense, %
	41	% and/or sell copies of ImageMagick, and to permit persons to whom the %
	42	% ImageMagick is furnished to do so, subject to the following conditions: %
	43	% %
	44	% The above copyright notice and this permission notice shall be included in %
	45	% all copies or substantial portions of ImageMagick. %
	46	% %
	47	% The software is provided "as is", without warranty of any kind, express or %
	48	% implied, including but not limited to the warranties of merchantability, %
	49	% fitness for a particular purpose and noninfringement. In no event shall %
	50	% ImageMagick Studio be liable for any claim, damages or other liability, %
	51	% whether in an action of contract, tort or otherwise, arising from, out of %
	52	% or in connection with ImageMagick or the use or other dealings in %
	53	% ImageMagick. %
	54	% %
	55	% Except as contained in this notice, the name of the ImageMagick Studio %
	56	% shall not be used in advertising or otherwise to promote the sale, use or %
	57	% other dealings in ImageMagick without prior written authorization from the %
	58	% ImageMagick Studio. %
	59	% %
	60	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	61	%
	62	%
	63	*/
	64
	65	// For compilers that support precompilation, includes "wx.h".
	66	#include "wx/wxprec.h"
	67
	68	#ifdef __BORLANDC__
	69	#pragma hdrstop
	70	#endif
	71
	72	#if wxUSE_XPM
	73
	74	#ifndef WX_PRECOMP
	75	#include "wx/log.h"
	76	#include "wx/intl.h"
	77	#include "wx/utils.h"
	78	#endif
	79
	80	#include "wx/imagxpm.h"
	81	#include "wx/wfstream.h"
	82	#include "wx/xpmdecod.h"
	83
	84	IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)
	85
	86	//-----------------------------------------------------------------------------
	87	// wxXPMHandler
	88	//-----------------------------------------------------------------------------
	89
	90	#if wxUSE_STREAMS
	91
	92	bool wxXPMHandler::LoadFile(wxImage *image,
	93	wxInputStream& stream,
	94	bool WXUNUSED(verbose), int WXUNUSED(index))
	95	{
	96	wxXPMDecoder decoder;
	97
	98	wxImage img = decoder.ReadFile(stream);
	99	if ( !img.Ok() )
	100	return false;
	101	*image = img;
	102	return true;
	103	}
	104
	105
	106	static char hexArray[] = "0123456789ABCDEF";
	107
	108	static void DecToHex(int dec, char *buf)
	109	{
	110	int firstDigit = (int)(dec/16.0);
	111	int secondDigit = (int)(dec - (firstDigit*16.0));
	112	buf[0] = hexArray[firstDigit];
	113	buf[1] = hexArray[secondDigit];
	114	buf[2] = 0;
	115	}
	116
	117
	118	bool wxXPMHandler::SaveFile(wxImage * image,
	119	wxOutputStream& stream, bool WXUNUSED(verbose))
	120	{
	121	wxString tmp;
	122	char tmp_c;
	123
	124	// 1. count colours:
	125	#define MaxCixels 92
	126	static const char Cixel[MaxCixels+1] =
	127	" .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
	128	"lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}\|";
	129	int chars_per_pixel;
	130	int cols;
	131	int i, j, k;
	132
	133	cols = image->CountColours();
	134	chars_per_pixel = 1;
	135	for ( k = MaxCixels; cols > k; k *= MaxCixels)
	136	chars_per_pixel++;
	137
	138	// 2. write the header:
	139	wxString sName;
	140	if ( image->HasOption(wxIMAGE_OPTION_FILENAME) )
	141	{
	142	wxSplitPath(image->GetOption(wxIMAGE_OPTION_FILENAME),
	143	NULL, &sName, NULL);
	144	sName << wxT("_xpm");
	145	}
	146
	147	if ( !sName.empty() )
	148	sName = wxString(wxT("/* XPM /\nstatic char ")) + sName;
	149	else
	150	sName = wxT("/* XPM /\nstatic char xpm_data");
	151	stream.Write( (const char*) sName.ToAscii(), sName.Len() );
	152
	153	char tmpbuf[200];
	154	// VS: 200b is safe upper bound for anything produced by sprintf below
	155	// (<101 bytes the string, neither %i can expand into more than 10 chars)
	156	sprintf(tmpbuf,
	157	"[] = {\n"
	158	"/* columns rows colors chars-per-pixel */\n"
	159	"\"%i %i %i %i\",\n",
	160	image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
	161	stream.Write(tmpbuf, strlen(tmpbuf));
	162
	163	// 3. create color symbols table:
	164	wxImageHistogram histogram;
	165	image->ComputeHistogram(histogram);
	166
	167	char symbols_data = new char[cols (chars_per_pixel+1)];
	168	char *symbols = new char[cols];
	169
	170	// 2a. find mask colour:
	171	unsigned long mask_key = 0x1000000 /invalid RGB value/;
	172	if (image->HasMask())
	173	mask_key = (image->GetMaskRed() << 16) \|
	174	(image->GetMaskGreen() << 8) \| image->GetMaskBlue();
	175
	176	// 2b. generate colour table:
	177	for (wxImageHistogram::iterator entry = histogram.begin();
	178	entry != histogram.end(); ++entry )
	179	{
	180	unsigned long index = entry->second.index;
	181	symbols[index] = symbols_data + index * (chars_per_pixel+1);
	182	char *sym = symbols[index];
	183
	184	k = index % MaxCixels;
	185	sym[0] = Cixel[k];
	186	for (j = 1; j < chars_per_pixel; j++)
	187	{
	188	k = ((index - k) / MaxCixels) % MaxCixels;
	189	sym[j] = Cixel[k];
	190	}
	191	sym[j] = '\0';
	192
	193	unsigned long key = entry->first;
	194
	195	if (key == 0)
	196	sprintf( tmpbuf, "\"%s c Black\",\n", sym);
	197	else if (key == mask_key)
	198	sprintf( tmpbuf, "\"%s c None\",\n", sym);
	199	else
	200	{
	201	char rbuf[3];
	202	DecToHex( (unsigned char)(key >> 16), rbuf );
	203	char gbuf[3];
	204	DecToHex( (unsigned char)(key >> 8), gbuf );
	205	char bbuf[3];
	206	DecToHex( (unsigned char)(key), bbuf );
	207	sprintf( tmpbuf, "\"%s c #%s%s%s\",\n", sym, rbuf, gbuf, bbuf );
	208	}
	209	stream.Write( tmpbuf, strlen(tmpbuf) );
	210	}
	211
	212	tmp = wxT("/* pixels */\n");
	213	stream.Write( (const char*) tmp.ToAscii(), tmp.length() );
	214
	215	unsigned char *data = image->GetData();
	216	for (j = 0; j < image->GetHeight(); j++)
	217	{
	218	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	219	for (i = 0; i < image->GetWidth(); i++, data += 3)
	220	{
	221	unsigned long key = (data[0] << 16) \| (data[1] << 8) \| (data[2]);
	222	stream.Write(symbols[histogram[key].index], chars_per_pixel);
	223	}
	224	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	225	if ( j + 1 < image->GetHeight() )
	226	{
	227	tmp_c = ','; stream.Write(&tmp_c, 1);
	228	}
	229	tmp_c = '\n'; stream.Write(&tmp_c, 1);
	230	}
	231	tmp = wxT("};\n");
	232	stream.Write( (const char*) tmp.ToAscii(), 3 );
	233
	234	// Clean up:
	235	delete[] symbols;
	236	delete[] symbols_data;
	237
	238	return true;
	239	}
	240
	241	bool wxXPMHandler::DoCanRead(wxInputStream& stream)
	242	{
	243	wxXPMDecoder decoder;
	244	return decoder.CanRead(stream);
	245	}
	246
	247	#endif // wxUSE_STREAMS
	248
	249	#endif // wxUSE_XPM