]>
Commit | Line | Data |
---|---|---|
1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/common/imagpnm.cpp | |
3 | // Purpose: wxImage PNM handler | |
4 | // Author: Sylvain Bougnoux | |
5 | // RCS-ID: $Id$ | |
6 | // Copyright: (c) Sylvain Bougnoux | |
7 | // Licence: wxWindows licence | |
8 | ///////////////////////////////////////////////////////////////////////////// | |
9 | ||
10 | // For compilers that support precompilation, includes "wx.h". | |
11 | #include "wx/wxprec.h" | |
12 | ||
13 | #ifdef __BORLANDC__ | |
14 | #pragma hdrstop | |
15 | #endif | |
16 | ||
17 | #if wxUSE_IMAGE && wxUSE_PNM | |
18 | ||
19 | #include "wx/imagpnm.h" | |
20 | ||
21 | #ifndef WX_PRECOMP | |
22 | #include "wx/intl.h" | |
23 | #include "wx/log.h" | |
24 | #endif | |
25 | ||
26 | #include "wx/txtstrm.h" | |
27 | ||
28 | //----------------------------------------------------------------------------- | |
29 | // wxBMPHandler | |
30 | //----------------------------------------------------------------------------- | |
31 | ||
32 | IMPLEMENT_DYNAMIC_CLASS(wxPNMHandler,wxImageHandler) | |
33 | ||
34 | #if wxUSE_STREAMS | |
35 | ||
36 | void Skip_Comment(wxInputStream &stream) | |
37 | { | |
38 | wxTextInputStream text_stream(stream); | |
39 | ||
40 | if (stream.Peek()==wxT('#')) | |
41 | { | |
42 | text_stream.ReadLine(); | |
43 | Skip_Comment(stream); | |
44 | } | |
45 | } | |
46 | ||
47 | bool wxPNMHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) ) | |
48 | { | |
49 | wxUint32 width, height; | |
50 | wxUint16 maxval; | |
51 | char c(0); | |
52 | ||
53 | image->Destroy(); | |
54 | ||
55 | /* | |
56 | * Read the PNM header | |
57 | */ | |
58 | ||
59 | wxBufferedInputStream buf_stream(stream); | |
60 | wxTextInputStream text_stream(buf_stream); | |
61 | ||
62 | Skip_Comment(buf_stream); | |
63 | if (buf_stream.GetC()==wxT('P')) c=buf_stream.GetC(); | |
64 | ||
65 | switch (c) | |
66 | { | |
67 | case wxT('2'): // ASCII Grey | |
68 | case wxT('3'): // ASCII RGB | |
69 | case wxT('5'): // RAW Grey | |
70 | case wxT('6'): break; | |
71 | default: | |
72 | if (verbose) | |
73 | { | |
74 | wxLogError(_("PNM: File format is not recognized.")); | |
75 | } | |
76 | return false; | |
77 | } | |
78 | ||
79 | text_stream.ReadLine(); // for the \n | |
80 | Skip_Comment(buf_stream); | |
81 | text_stream >> width >> height ; | |
82 | Skip_Comment(buf_stream); | |
83 | text_stream >> maxval; | |
84 | ||
85 | //cout << line << " " << width << " " << height << " " << maxval << endl; | |
86 | image->Create( width, height ); | |
87 | unsigned char *ptr = image->GetData(); | |
88 | if (!ptr) | |
89 | { | |
90 | if (verbose) | |
91 | { | |
92 | wxLogError( _("PNM: Couldn't allocate memory.") ); | |
93 | } | |
94 | return false; | |
95 | } | |
96 | ||
97 | ||
98 | if (c=='2') // Ascii GREY | |
99 | { | |
100 | wxUint32 value, size=width*height; | |
101 | for (wxUint32 i=0; i<size; ++i) | |
102 | { | |
103 | value=text_stream.Read32(); | |
104 | if ( maxval != 255 ) | |
105 | value = (255 * value)/maxval; | |
106 | *ptr++=(unsigned char)value; // R | |
107 | *ptr++=(unsigned char)value; // G | |
108 | *ptr++=(unsigned char)value; // B | |
109 | if ( !buf_stream ) | |
110 | { | |
111 | if (verbose) | |
112 | { | |
113 | wxLogError(_("PNM: File seems truncated.")); | |
114 | } | |
115 | return false; | |
116 | } | |
117 | } | |
118 | } | |
119 | if (c=='3') // Ascii RBG | |
120 | { | |
121 | wxUint32 value, size=3*width*height; | |
122 | for (wxUint32 i=0; i<size; ++i) | |
123 | { | |
124 | //this is very slow !!! | |
125 | //I wonder how we can make any better ? | |
126 | value=text_stream.Read32(); | |
127 | if ( maxval != 255 ) | |
128 | value = (255 * value)/maxval; | |
129 | *ptr++=(unsigned char)value; | |
130 | ||
131 | if ( !buf_stream ) | |
132 | { | |
133 | if (verbose) | |
134 | { | |
135 | wxLogError(_("PNM: File seems truncated.")); | |
136 | } | |
137 | return false; | |
138 | } | |
139 | } | |
140 | } | |
141 | if (c=='5') // Raw GREY | |
142 | { | |
143 | wxUint32 size=width*height; | |
144 | unsigned char value; | |
145 | for (wxUint32 i=0; i<size; ++i) | |
146 | { | |
147 | buf_stream.Read(&value,1); | |
148 | if ( maxval != 255 ) | |
149 | value = (255 * value)/maxval; | |
150 | *ptr++=value; // R | |
151 | *ptr++=value; // G | |
152 | *ptr++=value; // B | |
153 | if ( !buf_stream ) | |
154 | { | |
155 | if (verbose) | |
156 | { | |
157 | wxLogError(_("PNM: File seems truncated.")); | |
158 | } | |
159 | return false; | |
160 | } | |
161 | } | |
162 | } | |
163 | ||
164 | if ( c=='6' ) // Raw RGB | |
165 | { | |
166 | buf_stream.Read(ptr, 3*width*height); | |
167 | if ( maxval != 255 ) | |
168 | { | |
169 | for ( unsigned i = 0; i < 3*width*height; i++ ) | |
170 | ptr[i] = (255 * ptr[i])/maxval; | |
171 | } | |
172 | } | |
173 | ||
174 | image->SetMask( false ); | |
175 | ||
176 | const wxStreamError err = buf_stream.GetLastError(); | |
177 | return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF; | |
178 | } | |
179 | ||
180 | bool wxPNMHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool WXUNUSED(verbose) ) | |
181 | { | |
182 | wxTextOutputStream text_stream(stream); | |
183 | ||
184 | //text_stream << "P6" << endl | |
185 | //<< image->GetWidth() << " " << image->GetHeight() << endl | |
186 | //<< "255" << endl; | |
187 | text_stream << wxT("P6\n") << image->GetWidth() << wxT(" ") << image->GetHeight() << wxT("\n255\n"); | |
188 | stream.Write(image->GetData(),3*image->GetWidth()*image->GetHeight()); | |
189 | ||
190 | return stream.IsOk(); | |
191 | } | |
192 | ||
193 | bool wxPNMHandler::DoCanRead( wxInputStream& stream ) | |
194 | { | |
195 | Skip_Comment(stream); | |
196 | ||
197 | // it's ok to modify the stream position here | |
198 | if ( stream.GetC() == 'P' ) | |
199 | { | |
200 | switch ( stream.GetC() ) | |
201 | { | |
202 | case '2': // ASCII Grey | |
203 | case '3': // ASCII RGB | |
204 | case '5': // RAW Grey | |
205 | case '6': // RAW RGB | |
206 | return true; | |
207 | } | |
208 | } | |
209 | ||
210 | return false; | |
211 | } | |
212 | ||
213 | ||
214 | #endif // wxUSE_STREAMS | |
215 | ||
216 | #endif // wxUSE_IMAGE && wxUSE_PNM |