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"
#include "wx/filename.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.IsOk() )
        return false;
    *image = img;
    return true;
}

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

    wxImageHistogram histogram;
    int cols = int(image->ComputeHistogram(histogram));

    int 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) )
    {
        wxFileName::SplitPath(image->GetOption(wxIMAGE_OPTION_FILENAME),
                              NULL, &sName, NULL);
        sName << wxT("_xpm");
    }

    if ( !sName.empty() )
        sName = wxString(wxT("/* XPM */\nstatic const char *")) + sName;
    else
        sName = wxT("/* XPM */\nstatic const 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:
    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];

        for (j = 0; j < chars_per_pixel; j++)
        {
            sym[j] = Cixel[index % MaxCixels];
            index /= MaxCixels;
        }
        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
        {
            wxByte r = wxByte(key >> 16);
            wxByte g = wxByte(key >> 8);
            wxByte b = wxByte(key);
            sprintf(tmpbuf, "\"%s c #%02X%02X%02X\",\n", sym, r, g, b);
        }
        stream.Write( tmpbuf, strlen(tmpbuf) );
    }

    stream.Write("/* pixels */\n", 13);

    unsigned char *data = image->GetData();
    for (j = 0; j < image->GetHeight(); j++)
    {
        char tmp_c;
        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);
    }
    stream.Write("};\n", 3 );

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

    return true;
}

bool wxXPMHandler::DoCanRead(wxInputStream& stream)
{
    wxXPMDecoder decoder;
    return decoder.CanRead(stream);
         // it's ok to modify the stream position here
}

#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	#include "wx/filename.h"
	84
	85	IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)
	86
	87	//-----------------------------------------------------------------------------
	88	// wxXPMHandler
	89	//-----------------------------------------------------------------------------
	90
	91	#if wxUSE_STREAMS
	92
	93	bool wxXPMHandler::LoadFile(wxImage *image,
	94	wxInputStream& stream,
	95	bool WXUNUSED(verbose), int WXUNUSED(index))
	96	{
	97	wxXPMDecoder decoder;
	98
	99	wxImage img = decoder.ReadFile(stream);
	100	if ( !img.IsOk() )
	101	return false;
	102	*image = img;
	103	return true;
	104	}
	105
	106	bool wxXPMHandler::SaveFile(wxImage * image,
	107	wxOutputStream& stream, bool WXUNUSED(verbose))
	108	{
	109	// 1. count colours:
	110	#define MaxCixels 92
	111	static const char Cixel[MaxCixels+1] =
	112	" .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
	113	"lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}\|";
	114	int i, j, k;
	115
	116	wxImageHistogram histogram;
	117	int cols = int(image->ComputeHistogram(histogram));
	118
	119	int chars_per_pixel = 1;
	120	for ( k = MaxCixels; cols > k; k *= MaxCixels)
	121	chars_per_pixel++;
	122
	123	// 2. write the header:
	124	wxString sName;
	125	if ( image->HasOption(wxIMAGE_OPTION_FILENAME) )
	126	{
	127	wxFileName::SplitPath(image->GetOption(wxIMAGE_OPTION_FILENAME),
	128	NULL, &sName, NULL);
	129	sName << wxT("_xpm");
	130	}
	131
	132	if ( !sName.empty() )
	133	sName = wxString(wxT("/* XPM /\nstatic const char ")) + sName;
	134	else
	135	sName = wxT("/* XPM /\nstatic const char xpm_data");
	136	stream.Write( (const char*) sName.ToAscii(), sName.Len() );
	137
	138	char tmpbuf[200];
	139	// VS: 200b is safe upper bound for anything produced by sprintf below
	140	// (<101 bytes the string, neither %i can expand into more than 10 chars)
	141	sprintf(tmpbuf,
	142	"[] = {\n"
	143	"/* columns rows colors chars-per-pixel */\n"
	144	"\"%i %i %i %i\",\n",
	145	image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
	146	stream.Write(tmpbuf, strlen(tmpbuf));
	147
	148	// 3. create color symbols table:
	149	char symbols_data = new char[cols (chars_per_pixel+1)];
	150	char *symbols = new char[cols];
	151
	152	// 2a. find mask colour:
	153	unsigned long mask_key = 0x1000000 /invalid RGB value/;
	154	if (image->HasMask())
	155	mask_key = (image->GetMaskRed() << 16) \|
	156	(image->GetMaskGreen() << 8) \| image->GetMaskBlue();
	157
	158	// 2b. generate colour table:
	159	for (wxImageHistogram::iterator entry = histogram.begin();
	160	entry != histogram.end(); ++entry )
	161	{
	162	unsigned long index = entry->second.index;
	163	symbols[index] = symbols_data + index * (chars_per_pixel+1);
	164	char *sym = symbols[index];
	165
	166	for (j = 0; j < chars_per_pixel; j++)
	167	{
	168	sym[j] = Cixel[index % MaxCixels];
	169	index /= MaxCixels;
	170	}
	171	sym[j] = '\0';
	172
	173	unsigned long key = entry->first;
	174
	175	if (key == 0)
	176	sprintf( tmpbuf, "\"%s c Black\",\n", sym);
	177	else if (key == mask_key)
	178	sprintf( tmpbuf, "\"%s c None\",\n", sym);
	179	else
	180	{
	181	wxByte r = wxByte(key >> 16);
	182	wxByte g = wxByte(key >> 8);
	183	wxByte b = wxByte(key);
	184	sprintf(tmpbuf, "\"%s c #%02X%02X%02X\",\n", sym, r, g, b);
	185	}
	186	stream.Write( tmpbuf, strlen(tmpbuf) );
	187	}
	188
	189	stream.Write("/* pixels */\n", 13);
	190
	191	unsigned char *data = image->GetData();
	192	for (j = 0; j < image->GetHeight(); j++)
	193	{
	194	char tmp_c;
	195	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	196	for (i = 0; i < image->GetWidth(); i++, data += 3)
	197	{
	198	unsigned long key = (data[0] << 16) \| (data[1] << 8) \| (data[2]);
	199	stream.Write(symbols[histogram[key].index], chars_per_pixel);
	200	}
	201	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	202	if ( j + 1 < image->GetHeight() )
	203	{
	204	tmp_c = ','; stream.Write(&tmp_c, 1);
	205	}
	206	tmp_c = '\n'; stream.Write(&tmp_c, 1);
	207	}
	208	stream.Write("};\n", 3 );
	209
	210	// Clean up:
	211	delete[] symbols;
	212	delete[] symbols_data;
	213
	214	return true;
	215	}
	216
	217	bool wxXPMHandler::DoCanRead(wxInputStream& stream)
	218	{
	219	wxXPMDecoder decoder;
	220	return decoder.CanRead(stream);
	221	// it's ok to modify the stream position here
	222	}
	223
	224	#endif // wxUSE_STREAMS
	225
	226	#endif // wxUSE_XPM