src/common/imagxpm.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        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.                                                        %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/

#ifdef __GNUG__
#pragma implementation "imagxpm.h"
#endif

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

#ifdef __BORLANDC__
#  pragma hdrstop
#endif

#ifndef WX_PRECOMP
#  include "wx/defs.h"
#endif

#if wxUSE_XPM

#include "wx/imagxpm.h"
#include "wx/wfstream.h"
#include "wx/log.h"
#include "wx/intl.h"
#include "wx/utils.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;
}

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:
    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,
               "/* XPM */\n"
               "static char *xpm_data[] = {\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)
            tmp.Printf(wxT("\"%s c Black\",\n"), sym);
        else if (key == mask_key)
            tmp.Printf(wxT("\"%s c None\",\n"), sym);
        else
            tmp.Printf(wxT("\"%s c #%s%s%s\",\n"), sym,
                       wxDecToHex((unsigned char)(key >> 16)).c_str(),
                       wxDecToHex((unsigned char)(key >> 8)).c_str(),
                       wxDecToHex((unsigned char)(key)).c_str());
        stream.Write(tmp.mb_str(), tmp.Length());
    }

    tmp = wxT("/* pixels */\n");
    stream.Write(tmp.mb_str(), 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(tmp.mb_str(), 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: 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	#ifdef __GNUG__
	66	#pragma implementation "imagxpm.h"
	67	#endif
	68
	69	// For compilers that support precompilation, includes "wx.h".
	70	#include "wx/wxprec.h"
	71
	72	#ifdef __BORLANDC__
	73	# pragma hdrstop
	74	#endif
	75
	76	#ifndef WX_PRECOMP
	77	# include "wx/defs.h"
	78	#endif
	79
	80	#if wxUSE_XPM
	81
	82	#include "wx/imagxpm.h"
	83	#include "wx/wfstream.h"
	84	#include "wx/log.h"
	85	#include "wx/intl.h"
	86	#include "wx/utils.h"
	87	#include "wx/xpmdecod.h"
	88
	89	IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)
	90
	91	//-----------------------------------------------------------------------------
	92	// wxXPMHandler
	93	//-----------------------------------------------------------------------------
	94
	95	#if wxUSE_STREAMS
	96
	97	bool wxXPMHandler::LoadFile(wxImage *image,
	98	wxInputStream& stream,
	99	bool WXUNUSED(verbose), int WXUNUSED(index))
	100	{
	101	wxXPMDecoder decoder;
	102
	103	wxImage img = decoder.ReadFile(stream);
	104	if ( !img.Ok() )
	105	return FALSE;
	106	*image = img;
	107	return TRUE;
	108	}
	109
	110	bool wxXPMHandler::SaveFile(wxImage * image,
	111	wxOutputStream& stream, bool WXUNUSED(verbose))
	112	{
	113	wxString tmp;
	114	char tmp_c;
	115
	116	// 1. count colours:
	117	#define MaxCixels 92
	118	static const char Cixel[MaxCixels+1] =
	119	" .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
	120	"lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}\|";
	121	int chars_per_pixel;
	122	int cols;
	123	int i, j, k;
	124
	125	cols = image->CountColours();
	126	chars_per_pixel = 1;
	127	for ( k = MaxCixels; cols > k; k *= MaxCixels)
	128	chars_per_pixel++;
	129
	130	// 2. write the header:
	131	char tmpbuf[200];
	132	// VS: 200b is safe upper bound for anything produced by sprintf below
	133	// (101 bytes the string, neither %i can expand into more than 10 chars)
	134	sprintf(tmpbuf,
	135	"/* XPM */\n"
	136	"static char *xpm_data[] = {\n"
	137	"/* columns rows colors chars-per-pixel */\n"
	138	"\"%i %i %i %i\",\n",
	139	image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
	140	stream.Write(tmpbuf, strlen(tmpbuf));
	141
	142	// 3. create color symbols table:
	143	wxImageHistogram histogram;
	144	image->ComputeHistogram(histogram);
	145
	146	char symbols_data = new char[cols (chars_per_pixel+1)];
	147	char *symbols = new char[cols];
	148
	149	// 2a. find mask colour:
	150	unsigned long mask_key = 0x1000000 /invalid RGB value/;
	151	if (image->HasMask())
	152	mask_key = (image->GetMaskRed() << 16) \|
	153	(image->GetMaskGreen() << 8) \| image->GetMaskBlue();
	154
	155	// 2b. generate colour table:
	156	for (wxImageHistogram::iterator entry = histogram.begin();
	157	entry != histogram.end(); entry++ )
	158	{
	159	unsigned long index = entry->second.index;
	160	symbols[index] = symbols_data + index * (chars_per_pixel+1);
	161	char *sym = symbols[index];
	162
	163	k = index % MaxCixels;
	164	sym[0] = Cixel[k];
	165	for (j = 1; j < chars_per_pixel; j++)
	166	{
	167	k = ((index - k) / MaxCixels) % MaxCixels;
	168	sym[j] = Cixel[k];
	169	}
	170	sym[j] = '\0';
	171
	172	unsigned long key = entry->first;
	173
	174	if (key == 0)
	175	tmp.Printf(wxT("\"%s c Black\",\n"), sym);
	176	else if (key == mask_key)
	177	tmp.Printf(wxT("\"%s c None\",\n"), sym);
	178	else
	179	tmp.Printf(wxT("\"%s c #%s%s%s\",\n"), sym,
	180	wxDecToHex((unsigned char)(key >> 16)).c_str(),
	181	wxDecToHex((unsigned char)(key >> 8)).c_str(),
	182	wxDecToHex((unsigned char)(key)).c_str());
	183	stream.Write(tmp.mb_str(), tmp.Length());
	184	}
	185
	186	tmp = wxT("/* pixels */\n");
	187	stream.Write(tmp.mb_str(), tmp.Length());
	188
	189	unsigned char *data = image->GetData();
	190	for (j = 0; j < image->GetHeight(); j++)
	191	{
	192	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	193	for (i = 0; i < image->GetWidth(); i++, data += 3)
	194	{
	195	unsigned long key = (data[0] << 16) \| (data[1] << 8) \| (data[2]);
	196	stream.Write(symbols[histogram[key].index], chars_per_pixel);
	197	}
	198	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	199	if ( j + 1 < image->GetHeight() )
	200	{
	201	tmp_c = ','; stream.Write(&tmp_c, 1);
	202	}
	203	tmp_c = '\n'; stream.Write(&tmp_c, 1);
	204	}
	205	tmp = wxT("};\n");
	206	stream.Write(tmp.mb_str(), 3);
	207
	208	// Clean up:
	209	delete[] symbols;
	210	delete[] symbols_data;
	211
	212	return TRUE;
	213	}
	214
	215	bool wxXPMHandler::DoCanRead(wxInputStream& stream)
	216	{
	217	wxXPMDecoder decoder;
	218	return decoder.CanRead(stream);
	219	}
	220
	221	#endif // wxUSE_STREAMS
	222
	223	#endif // wxUSE_XPM