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added possibility to throw different objects and crash directly from the main frame...
[wxWidgets.git] / src / common / imagpnm.cpp
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1/////////////////////////////////////////////////////////////////////////////
2// Name: imagpnm.cpp
3// Purpose: wxImage PNM handler
4// Author: Sylvain Bougnoux
5// RCS-ID: $Id$
6// Copyright: (c) Sylvain Bougnoux
65571936 7// Licence: wxWindows licence
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8/////////////////////////////////////////////////////////////////////////////
9
14f355c2 10#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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11#pragma implementation "imagpnm.h"
12#endif
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13
14// For compilers that support precompilation, includes "wx.h".
15#include "wx/wxprec.h"
16
17#ifdef __BORLANDC__
18#pragma hdrstop
19#endif
20
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21#ifndef WX_PRECOMP
22# include "wx/setup.h"
23#endif
24
c96ea657 25#if wxUSE_IMAGE && wxUSE_PNM
b9b32d5c 26
8f493002 27#include "wx/imagpnm.h"
a8d9809f 28#include "wx/log.h"
58c837a4 29#include "wx/intl.h"
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30#include "wx/txtstrm.h"
31
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32//-----------------------------------------------------------------------------
33// wxBMPHandler
34//-----------------------------------------------------------------------------
35
a8d9809f 36IMPLEMENT_DYNAMIC_CLASS(wxPNMHandler,wxImageHandler)
a8d9809f 37
9ab6ee85 38#if wxUSE_STREAMS
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39
40void Skip_Comment(wxInputStream &stream)
41{
2b5f62a0 42 wxTextInputStream text_stream(stream);
a8d9809f 43
2b5f62a0 44 if (stream.Peek()==wxT('#'))
a8d9809f 45 {
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46 text_stream.ReadLine();
47 Skip_Comment(stream);
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48 }
49}
50
58c837a4 51bool wxPNMHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
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52{
53 wxUint32 width, height;
54 wxUint16 maxval;
a8d9809f 55 char c(0);
995612e2 56
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57 image->Destroy();
58
59 /*
60 * Read the PNM header
61 */
62
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63 wxBufferedInputStream buf_stream(stream);
64 wxTextInputStream text_stream(buf_stream);
a8d9809f 65
6319afe3 66 Skip_Comment(buf_stream);
223d09f6 67 if (buf_stream.GetC()==wxT('P')) c=buf_stream.GetC();
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68
69 switch (c)
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70 {
71 case wxT('2'):
72 if (verbose) wxLogError(_("Loading Grey Ascii PNM image is not yet implemented."));
7beb59f3 73 return false;
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74 case wxT('5'):
75 if (verbose) wxLogError(_("Loading Grey Raw PNM image is not yet implemented."));
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76 return false;
77 case wxT('3'):
78 case wxT('6'): break;
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79 default:
80 if (verbose) wxLogError(_("PNM: File format is not recognized."));
7beb59f3 81 return false;
58c837a4 82 }
a8d9809f 83
41d1f82d 84 text_stream.ReadLine(); // for the \n
6319afe3 85 Skip_Comment(buf_stream);
a8d9809f 86 text_stream >> width >> height ;
995612e2 87 Skip_Comment(buf_stream);
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88 text_stream >> maxval;
89
a2b8bd55 90 //cout << line << " " << width << " " << height << " " << maxval << endl;
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91 image->Create( width, height );
92 unsigned char *ptr = image->GetData();
93 if (!ptr)
94 {
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95 if (verbose)
96 wxLogError( _("PNM: Couldn't allocate memory.") );
7beb59f3 97 return false;
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98 }
99
a2b8bd55 100 if (c=='3') // Ascii RBG
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101 {
102 wxUint32 value, size=3*width*height;
103 for (wxUint32 i=0; i<size; ++i)
104 {
105 //this is very slow !!!
106 //I wonder how we can make any better ?
107 value=text_stream.Read32();
108 *ptr++=(unsigned char)value;
109
2b5f62a0 110 if ( !buf_stream )
995612e2 111 {
58c837a4 112 if (verbose) wxLogError(_("PNM: File seems truncated."));
7beb59f3 113 return false;
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114 }
115 }
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116 }
117 if (c=='6') // Raw RGB
503aa33d 118 buf_stream.Read( ptr, 3*width*height );
a8d9809f 119
7beb59f3 120 image->SetMask( false );
a8d9809f 121
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122 const wxStreamError err = buf_stream.GetLastError();
123 return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF;
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124}
125
126bool wxPNMHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool WXUNUSED(verbose) )
127{
128 wxTextOutputStream text_stream(stream);
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129
130 //text_stream << "P6" << endl
131 //<< image->GetWidth() << " " << image->GetHeight() << endl
a8d9809f 132 //<< "255" << endl;
2b5f62a0 133 text_stream << wxT("P6\n") << image->GetWidth() << wxT(" ") << image->GetHeight() << wxT("\n255\n");
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134 stream.Write(image->GetData(),3*image->GetWidth()*image->GetHeight());
135
2b5f62a0 136 return stream.IsOk();
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137}
138
995612e2 139bool wxPNMHandler::DoCanRead( wxInputStream& stream )
0828c087 140{
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141 Skip_Comment(stream);
142
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143 if ( stream.GetC() == 'P' )
144 {
145 switch (stream.GetC())
146 {
147 case '3':
148 case '6':
7beb59f3 149 return true;
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150 }
151 }
93dfff5a 152
7beb59f3 153 return false;
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154}
155
156
9ab6ee85 157#endif // wxUSE_STREAMS
a8d9809f 158
9ab6ee85 159#endif // wxUSE_PNM