/////////////////////////////////////////////////////////////////////////////
// Name: src/common/imagxpm.cpp
// Purpose: wxXPMHandler
// Author: Vaclav Slavik, Robert Roebling
// 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"
wxIMPLEMENT_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;
}
namespace
{
// Make the given string a valid C identifier.
//
// All invalid characters are simply replaced by underscores and underscore is
// also prepended in the beginning if the initial character is not alphabetic.
void
MakeValidCIdent(wxString* str)
{
const wxChar chUnderscore = wxT('_');
for ( wxString::iterator it = str->begin(); it != str->end(); ++it )
{
const wxChar ch = *it;
if ( wxIsdigit(ch) )
{
if ( it == str->begin() )
{
// Identifiers can't start with a digit.
str->insert(0, chUnderscore); // prepend underscore
it = str->begin(); // restart as string changed
continue;
}
}
else if ( !wxIsalpha(ch) && ch != chUnderscore )
{
// Not a valid character in C identifiers.
*it = chUnderscore;
}
}
// Double underscores are not allowed in normal C identifiers and are
// useless anyhow.
str->Replace(wxT("__"), wxT("_"));
}
} // anonymous namespace
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) )
{
sName = wxFileName(image->GetOption(wxIMAGE_OPTION_FILENAME)).GetName();
MakeValidCIdent(&sName);
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
↑ V820 The 'img' variable is not used after copying. Copying can be replaced with move/swap for optimization.