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[wxWidgets.git] / src / common / imagxpm.cpp
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c96ea657 1/////////////////////////////////////////////////////////////////////////////
8898456d 2// Name: src/common/imagxpm.cpp
c96ea657 3// Purpose: wxXPMHandler
424f5e27 4// Author: Vaclav Slavik, Robert Roebling
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5// RCS-ID: $Id$
6// Copyright: (c) 2001 Vaclav Slavik
65571936 7// Licence: wxWindows licence
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8/////////////////////////////////////////////////////////////////////////////
9
10/*
11
12This file is partially based on source code of ImageMagick by John Cristy. Its
13license 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
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65// For compilers that support precompilation, includes "wx.h".
66#include "wx/wxprec.h"
67
68#ifdef __BORLANDC__
8898456d 69 #pragma hdrstop
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70#endif
71
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72#if wxUSE_XPM
73
c96ea657 74#ifndef WX_PRECOMP
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75 #include "wx/log.h"
76 #include "wx/intl.h"
de6185e2 77 #include "wx/utils.h"
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78#endif
79
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80#include "wx/imagxpm.h"
81#include "wx/wfstream.h"
424f5e27 82#include "wx/xpmdecod.h"
bd365871 83#include "wx/filename.h"
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84
85IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)
86
87//-----------------------------------------------------------------------------
88// wxXPMHandler
89//-----------------------------------------------------------------------------
90
91#if wxUSE_STREAMS
92
33ac7e6f 93bool wxXPMHandler::LoadFile(wxImage *image,
424f5e27 94 wxInputStream& stream,
38caaa61 95 bool WXUNUSED(verbose), int WXUNUSED(index))
c96ea657 96{
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97 wxXPMDecoder decoder;
98
99 wxImage img = decoder.ReadFile(stream);
100 if ( !img.Ok() )
7beb59f3 101 return false;
424f5e27 102 *image = img;
7beb59f3 103 return true;
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104}
105
106bool wxXPMHandler::SaveFile(wxImage * image,
33ac7e6f 107 wxOutputStream& stream, bool WXUNUSED(verbose))
c96ea657 108{
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109 // 1. count colours:
110 #define MaxCixels 92
33ac7e6f 111 static const char Cixel[MaxCixels+1] =
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112 " .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
113 "lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}|";
c96ea657 114 int i, j, k;
33ac7e6f 115
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116 wxImageHistogram histogram;
117 int cols = int(image->ComputeHistogram(histogram));
118
119 int chars_per_pixel = 1;
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120 for ( k = MaxCixels; cols > k; k *= MaxCixels)
121 chars_per_pixel++;
122
7beb59f3 123 // 2. write the header:
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124 wxString sName;
125 if ( image->HasOption(wxIMAGE_OPTION_FILENAME) )
126 {
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127 wxFileName::SplitPath(image->GetOption(wxIMAGE_OPTION_FILENAME),
128 NULL, &sName, NULL);
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129 sName << wxT("_xpm");
130 }
7beb59f3 131
8898456d 132 if ( !sName.empty() )
90e4fb5d 133 sName = wxString(wxT("/* XPM */\nstatic const char *")) + sName;
7beb59f3 134 else
90e4fb5d 135 sName = wxT("/* XPM */\nstatic const char *xpm_data");
2b5f62a0 136 stream.Write( (const char*) sName.ToAscii(), sName.Len() );
fd94e8aa 137
ffe107c8 138 char tmpbuf[200];
2ef44ad5 139 // VS: 200b is safe upper bound for anything produced by sprintf below
fd94e8aa 140 // (<101 bytes the string, neither %i can expand into more than 10 chars)
7beb59f3 141 sprintf(tmpbuf,
fd94e8aa 142 "[] = {\n"
c96ea657 143 "/* columns rows colors chars-per-pixel */\n"
33ac7e6f 144 "\"%i %i %i %i\",\n",
c96ea657 145 image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
ffe107c8 146 stream.Write(tmpbuf, strlen(tmpbuf));
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147
148 // 3. create color symbols table:
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149 char *symbols_data = new char[cols * (chars_per_pixel+1)];
150 char **symbols = new char*[cols];
151
152 // 2a. find mask colour:
952ae1e8 153 unsigned long mask_key = 0x1000000 /*invalid RGB value*/;
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154 if (image->HasMask())
155 mask_key = (image->GetMaskRed() << 16) |
156 (image->GetMaskGreen() << 8) | image->GetMaskBlue();
33ac7e6f 157
c96ea657 158 // 2b. generate colour table:
952ae1e8 159 for (wxImageHistogram::iterator entry = histogram.begin();
60d8e886 160 entry != histogram.end(); ++entry )
c96ea657 161 {
952ae1e8 162 unsigned long index = entry->second.index;
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163 symbols[index] = symbols_data + index * (chars_per_pixel+1);
164 char *sym = symbols[index];
165
0200fb27 166 for (j = 0; j < chars_per_pixel; j++)
c96ea657 167 {
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168 sym[j] = Cixel[index % MaxCixels];
169 index /= MaxCixels;
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170 }
171 sym[j] = '\0';
172
952ae1e8 173 unsigned long key = entry->first;
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174
175 if (key == 0)
2b5f62a0 176 sprintf( tmpbuf, "\"%s c Black\",\n", sym);
c96ea657 177 else if (key == mask_key)
2b5f62a0 178 sprintf( tmpbuf, "\"%s c None\",\n", sym);
c96ea657 179 else
2b5f62a0 180 {
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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);
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185 }
186 stream.Write( tmpbuf, strlen(tmpbuf) );
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187 }
188
2eaf6433 189 stream.Write("/* pixels */\n", 13);
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190
191 unsigned char *data = image->GetData();
192 for (j = 0; j < image->GetHeight(); j++)
193 {
2eaf6433 194 char tmp_c;
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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]);
952ae1e8 199 stream.Write(symbols[histogram[key].index], chars_per_pixel);
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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 }
2eaf6433 208 stream.Write("};\n", 3 );
33ac7e6f 209
2ef44ad5 210 // Clean up:
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211 delete[] symbols;
212 delete[] symbols_data;
213
7beb59f3 214 return true;
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215}
216
217bool wxXPMHandler::DoCanRead(wxInputStream& stream)
218{
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219 wxXPMDecoder decoder;
220 return decoder.CanRead(stream);
8faef7cc 221 // it's ok to modify the stream position here
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222}
223
224#endif // wxUSE_STREAMS
225
c67d6888 226#endif // wxUSE_XPM