src/common/imagxpm.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        imagxpm.cpp
// Purpose:     wxXPMHandler
// Author:      Vaclav Slavik
// 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_IMAGE && wxUSE_XPM

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


IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)

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

#if wxUSE_STREAMS

bool wxXPMHandler::LoadFile(wxImage *WXUNUSED(image),
                            wxInputStream& WXUNUSED(stream),
                            bool verbose, int WXUNUSED(index))
{
    if (verbose)
        wxLogDebug(_("XPM: the handler is write-only!"));
    return FALSE;
}

bool wxXPMHandler::SaveFile(wxImage * image,
                            wxOutputStream& stream, bool 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:
    tmp.Printf("/* 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(tmp.mb_str(), tmp.Length());

    // 3. create color symbols table:
    wxHashTable table(wxKEY_INTEGER);
    image->ComputeHistogram(table);

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

    // 2a. find mask colour:
    long mask_key = -1;
    if (image->HasMask())
        mask_key = (image->GetMaskRed() << 16) |
                   (image->GetMaskGreen() << 8) | image->GetMaskBlue();

    // 2b. generate colour table:
    table.BeginFind();
    wxNode *node = NULL;
    while ((node = table.Next()) != NULL)
    {
        wxHNode *hnode = (wxHNode*) node->GetData();
        long index = hnode->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';

        long key = node->GetKeyInteger();

        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]);
            wxHNode *hnode = (wxHNode*) table.Get(key);
            stream.Write(symbols[hnode->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);

    delete[] symbols;
    delete[] symbols_data;

    return TRUE;
}

bool wxXPMHandler::DoCanRead(wxInputStream& stream)
{
    unsigned char buf[9];

    stream.Read(buf, 9);
    stream.SeekI(-9, wxFromCurrent);

    return (memcmp(buf, "/* XPM */", 9) == 0);
}

#endif  // wxUSE_STREAMS

#endif // wxUSE_XPM && wxUSE_IMAGE
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: imagxpm.cpp
	3	// Purpose: wxXPMHandler
	4	// Author: Vaclav Slavik
	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_IMAGE && 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
	88
	89	IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)
	90
	91	//-----------------------------------------------------------------------------
	92	// wxXPMHandler
	93	//-----------------------------------------------------------------------------
	94
	95	#if wxUSE_STREAMS
	96
	97	bool wxXPMHandler::LoadFile(wxImage *WXUNUSED(image),
	98	wxInputStream& WXUNUSED(stream),
	99	bool verbose, int WXUNUSED(index))
	100	{
	101	if (verbose)
	102	wxLogDebug(_("XPM: the handler is write-only!"));
	103	return FALSE;
	104	}
	105
	106	bool wxXPMHandler::SaveFile(wxImage * image,
	107	wxOutputStream& stream, bool verbose)
	108	{
	109	wxString tmp;
	110	char tmp_c;
	111
	112	// 1. count colours:
	113	#define MaxCixels 92
	114	static const char Cixel[MaxCixels+1] =
	115	" .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
	116	"lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}\|";
	117	int chars_per_pixel;
	118	int cols;
	119	int i, j, k;
	120
	121	cols = image->CountColours();
	122	chars_per_pixel = 1;
	123	for ( k = MaxCixels; cols > k; k *= MaxCixels)
	124	chars_per_pixel++;
	125
	126	// 2. write the header:
	127	tmp.Printf("/* XPM */\n"
	128	"static char *xpm_data[] = {\n"
	129	"/* columns rows colors chars-per-pixel */\n"
	130	"\"%i %i %i %i\",\n",
	131	image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
	132	stream.Write(tmp.mb_str(), tmp.Length());
	133
	134	// 3. create color symbols table:
	135	wxHashTable table(wxKEY_INTEGER);
	136	image->ComputeHistogram(table);
	137
	138	char symbols_data = new char[cols (chars_per_pixel+1)];
	139	char *symbols = new char[cols];
	140
	141	// 2a. find mask colour:
	142	long mask_key = -1;
	143	if (image->HasMask())
	144	mask_key = (image->GetMaskRed() << 16) \|
	145	(image->GetMaskGreen() << 8) \| image->GetMaskBlue();
	146
	147	// 2b. generate colour table:
	148	table.BeginFind();
	149	wxNode *node = NULL;
	150	while ((node = table.Next()) != NULL)
	151	{
	152	wxHNode hnode = (wxHNode) node->GetData();
	153	long index = hnode->index;
	154	symbols[index] = symbols_data + index * (chars_per_pixel+1);
	155	char *sym = symbols[index];
	156
	157	k = index % MaxCixels;
	158	sym[0] = Cixel[k];
	159	for (j = 1; j < chars_per_pixel; j++)
	160	{
	161	k = ((index - k) / MaxCixels) % MaxCixels;
	162	sym[j] = Cixel[k];
	163	}
	164	sym[j] = '\0';
	165
	166	long key = node->GetKeyInteger();
	167
	168	if (key == 0)
	169	tmp.Printf(wxT("\"%s c Black\",\n"), sym);
	170	else if (key == mask_key)
	171	tmp.Printf(wxT("\"%s c None\",\n"), sym);
	172	else
	173	tmp.Printf(wxT("\"%s c #%s%s%s\",\n"), sym,
	174	wxDecToHex((unsigned char)(key >> 16)).c_str(),
	175	wxDecToHex((unsigned char)(key >> 8)).c_str(),
	176	wxDecToHex((unsigned char)(key)).c_str());
	177	stream.Write(tmp.mb_str(), tmp.Length());
	178	}
	179
	180	tmp = wxT("/* pixels */\n");
	181	stream.Write(tmp.mb_str(), tmp.Length());
	182
	183	unsigned char *data = image->GetData();
	184	for (j = 0; j < image->GetHeight(); j++)
	185	{
	186	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	187	for (i = 0; i < image->GetWidth(); i++, data += 3)
	188	{
	189	unsigned long key = (data[0] << 16) \| (data[1] << 8) \| (data[2]);
	190	wxHNode hnode = (wxHNode) table.Get(key);
	191	stream.Write(symbols[hnode->index], chars_per_pixel);
	192	}
	193	tmp_c = '\"'; stream.Write(&tmp_c, 1);
	194	if ( j + 1 < image->GetHeight() )
	195	{
	196	tmp_c = ','; stream.Write(&tmp_c, 1);
	197	}
	198	tmp_c = '\n'; stream.Write(&tmp_c, 1);
	199	}
	200	tmp = wxT("};\n");
	201	stream.Write(tmp.mb_str(), 3);
	202
	203	delete[] symbols;
	204	delete[] symbols_data;
	205
	206	return TRUE;
	207	}
	208
	209	bool wxXPMHandler::DoCanRead(wxInputStream& stream)
	210	{
	211	unsigned char buf[9];
	212
	213	stream.Read(buf, 9);
	214	stream.SeekI(-9, wxFromCurrent);
	215
	216	return (memcmp(buf, "/* XPM */", 9) == 0);
	217	}
	218
	219	#endif // wxUSE_STREAMS
	220
	221	#endif // wxUSE_XPM && wxUSE_IMAGE