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1/////////////////////////////////////////////////////////////////////////////
2// Name: imagxpm.cpp
3// Purpose: wxXPMHandler
424f5e27 4// Author: Vaclav Slavik, Robert Roebling
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5// RCS-ID: $Id$
6// Copyright: (c) 2001 Vaclav Slavik
7// Licence: wxWindows licence
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
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
c67d6888 80#if wxUSE_XPM
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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"
424f5e27 87#include "wx/xpmdecod.h"
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88
89IMPLEMENT_DYNAMIC_CLASS(wxXPMHandler,wxImageHandler)
90
91//-----------------------------------------------------------------------------
92// wxXPMHandler
93//-----------------------------------------------------------------------------
94
95#if wxUSE_STREAMS
96
33ac7e6f 97bool wxXPMHandler::LoadFile(wxImage *image,
424f5e27 98 wxInputStream& stream,
38caaa61 99 bool WXUNUSED(verbose), int WXUNUSED(index))
c96ea657 100{
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101 wxXPMDecoder decoder;
102
103 wxImage img = decoder.ReadFile(stream);
104 if ( !img.Ok() )
105 return FALSE;
106 *image = img;
107 return TRUE;
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108}
109
110bool wxXPMHandler::SaveFile(wxImage * image,
33ac7e6f 111 wxOutputStream& stream, bool WXUNUSED(verbose))
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112{
113 wxString tmp;
114 char tmp_c;
33ac7e6f 115
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116 // 1. count colours:
117 #define MaxCixels 92
33ac7e6f 118 static const char Cixel[MaxCixels+1] =
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119 " .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjk"
120 "lzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}|";
121 int chars_per_pixel;
122 int cols;
123 int i, j, k;
33ac7e6f 124
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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:
ffe107c8 131 char tmpbuf[200];
2ef44ad5 132 // VS: 200b is safe upper bound for anything produced by sprintf below
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133 // (101 bytes the string, neither %i can expand into more than 10 chars)
134 sprintf(tmpbuf,
135 "/* XPM */\n"
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136 "static char *xpm_data[] = {\n"
137 "/* columns rows colors chars-per-pixel */\n"
33ac7e6f 138 "\"%i %i %i %i\",\n",
c96ea657 139 image->GetWidth(), image->GetHeight(), cols, chars_per_pixel);
ffe107c8 140 stream.Write(tmpbuf, strlen(tmpbuf));
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141
142 // 3. create color symbols table:
143 wxHashTable table(wxKEY_INTEGER);
144 image->ComputeHistogram(table);
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 long mask_key = -1;
151 if (image->HasMask())
152 mask_key = (image->GetMaskRed() << 16) |
153 (image->GetMaskGreen() << 8) | image->GetMaskBlue();
33ac7e6f 154
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155 // 2b. generate colour table:
156 table.BeginFind();
157 wxNode *node = NULL;
158 while ((node = table.Next()) != NULL)
159 {
160 wxHNode *hnode = (wxHNode*) node->GetData();
161 long index = hnode->index;
162 symbols[index] = symbols_data + index * (chars_per_pixel+1);
163 char *sym = symbols[index];
164
165 k = index % MaxCixels;
166 sym[0] = Cixel[k];
167 for (j = 1; j < chars_per_pixel; j++)
168 {
169 k = ((index - k) / MaxCixels) % MaxCixels;
170 sym[j] = Cixel[k];
171 }
172 sym[j] = '\0';
173
174 long key = node->GetKeyInteger();
175
176 if (key == 0)
177 tmp.Printf(wxT("\"%s c Black\",\n"), sym);
178 else if (key == mask_key)
179 tmp.Printf(wxT("\"%s c None\",\n"), sym);
180 else
33ac7e6f 181 tmp.Printf(wxT("\"%s c #%s%s%s\",\n"), sym,
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182 wxDecToHex((unsigned char)(key >> 16)).c_str(),
183 wxDecToHex((unsigned char)(key >> 8)).c_str(),
184 wxDecToHex((unsigned char)(key)).c_str());
185 stream.Write(tmp.mb_str(), tmp.Length());
186 }
187
188 tmp = wxT("/* pixels */\n");
189 stream.Write(tmp.mb_str(), tmp.Length());
190
191 unsigned char *data = image->GetData();
192 for (j = 0; j < image->GetHeight(); j++)
193 {
194 tmp_c = '\"'; stream.Write(&tmp_c, 1);
195 for (i = 0; i < image->GetWidth(); i++, data += 3)
196 {
197 unsigned long key = (data[0] << 16) | (data[1] << 8) | (data[2]);
198 wxHNode *hnode = (wxHNode*) table.Get(key);
199 stream.Write(symbols[hnode->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 tmp = wxT("};\n");
209 stream.Write(tmp.mb_str(), 3);
33ac7e6f 210
2ef44ad5 211 // Clean up:
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212 delete[] symbols;
213 delete[] symbols_data;
214
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215 // FIXME: it will be better to use macros-based wxHashTable & DeleteContents(TRUE)
216 table.BeginFind();
217 while ((node = table.Next()) != NULL)
218 {
219 delete (wxHNode *) node->GetData();
220 }
221
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222 return TRUE;
223}
224
225bool wxXPMHandler::DoCanRead(wxInputStream& stream)
226{
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227 wxXPMDecoder decoder;
228 return decoder.CanRead(stream);
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229}
230
231#endif // wxUSE_STREAMS
232
c67d6888 233#endif // wxUSE_XPM