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Viewing changes to source/Irrlicht/CImageLoaderPPM.cpp

  • Committer: Mantas Kriaučiūnas
  • Date: 2011-07-18 13:06:25 UTC
  • Revision ID: mantas@akl.lt-20110718130625-c5pvifp61e7kj1ol
Included whole irrlicht SVN libraries to work around launchpad recipe issue with quilt, see https://answers.launchpad.net/launchpad/+question/165193

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source/Irrlicht/CImageLoaderPPM.cpp
 
1
// Copyright (C) 2007-2011 Christian Stehno
 
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// This file is part of the "Irrlicht Engine".
 
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// For conditions of distribution and use, see copyright notice in irrlicht.h
 
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#include "CImageLoaderPPM.h"
 
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#ifdef _IRR_COMPILE_WITH_PPM_LOADER_
 
8
 
 
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#include "IReadFile.h"
 
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#include "CColorConverter.h"
 
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#include "CImage.h"
 
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#include "os.h"
 
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#include "fast_atof.h"
 
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#include "coreutil.h"
 
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namespace irr
 
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{
 
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namespace video
 
19
{
 
20
 
 
21
 
 
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//! constructor
 
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CImageLoaderPPM::CImageLoaderPPM()
 
24
{
 
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        #ifdef _DEBUG
 
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        setDebugName("CImageLoaderPPM");
 
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        #endif
 
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}
 
29
 
 
30
 
 
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//! returns true if the file maybe is able to be loaded by this class
 
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//! based on the file extension (e.g. ".tga")
 
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bool CImageLoaderPPM::isALoadableFileExtension(const io::path& filename) const
 
34
{
 
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        return core::hasFileExtension ( filename, "ppm", "pgm", "pbm" );
 
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}
 
37
 
 
38
 
 
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//! returns true if the file maybe is able to be loaded by this class
 
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bool CImageLoaderPPM::isALoadableFileFormat(io::IReadFile* file) const
 
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{
 
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        c8 id[2]={0};
 
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        file->read(&id, 2);
 
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        return (id[0]=='P' && id[1]>'0' && id[1]<'7');
 
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}
 
46
 
 
47
 
 
48
//! creates a surface from the file
 
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IImage* CImageLoaderPPM::loadImage(io::IReadFile* file) const
 
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{
 
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        IImage* image;
 
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        if (file->getSize() < 12)
 
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                return 0;
 
55
 
 
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        c8 id[2];
 
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        file->read(&id, 2);
 
58
 
 
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        if (id[0]!='P' || id[1]<'1' || id[1]>'6')
 
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                return 0;
 
61
 
 
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        const u8 format = id[1] - '0';
 
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        const bool binary = format>3;
 
64
 
 
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        core::stringc token;
 
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        getNextToken(file, token);
 
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        const u32 width = core::strtoul10(token.c_str());
 
68
 
 
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        getNextToken(file, token);
 
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        const u32 height = core::strtoul10(token.c_str());
 
71
 
 
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        u8* data = 0;
 
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        const u32 size = width*height;
 
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        if (format==1 || format==4)
 
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        {
 
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                skipToNextToken(file); // go to start of data
 
77
 
 
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                const u32 bytesize = size/8+(size & 3)?1:0;
 
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                if (binary)
 
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                {
 
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                        if (file->getSize()-file->getPos() < (long)bytesize)
 
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                                return 0;
 
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                        data = new u8[bytesize];
 
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                        file->read(data, bytesize);
 
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                }
 
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                else
 
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                {
 
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                        if (file->getSize()-file->getPos() < (long)(2*size)) // optimistic test
 
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                                return 0;
 
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                        data = new u8[bytesize];
 
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                        memset(data, 0, bytesize);
 
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                        u32 shift=0;
 
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                        for (u32 i=0; i<size; ++i)
 
94
                        {
 
95
                                getNextToken(file, token);
 
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                                if (token == "1")
 
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                                        data[i/8] |= (0x01 << shift);
 
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                                if (++shift == 8)
 
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                                        shift=0;
 
100
                        }
 
101
                }
 
102
                image = new CImage(ECF_A1R5G5B5, core::dimension2d<u32>(width, height));
 
103
                if (image)
 
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                        CColorConverter::convert1BitTo16Bit(data, (s16*)image->lock(), width, height);
 
105
        }
 
106
        else
 
107
        {
 
108
                getNextToken(file, token);
 
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                const u32 maxDepth = core::strtoul10(token.c_str());
 
110
                if (maxDepth > 255) // no double bytes yet
 
111
                        return 0;
 
112
 
 
113
                skipToNextToken(file); // go to start of data
 
114
 
 
115
                if (format==2 || format==5)
 
116
                {
 
117
                        if (binary)
 
118
                        {
 
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                                if (file->getSize()-file->getPos() < (long)size)
 
120
                                        return 0;
 
121
                                data = new u8[size];
 
122
                                file->read(data, size);
 
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                                image = new CImage(ECF_A8R8G8B8, core::dimension2d<u32>(width, height));
 
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                                if (image)
 
125
                                {
 
126
                                        u8* ptr = (u8*)image->lock();
 
127
                                        for (u32 i=0; i<size; ++i)
 
128
                                        {
 
129
                                                *ptr++ = data[i];
 
130
                                                *ptr++ = data[i];
 
131
                                                *ptr++ = data[i];
 
132
                                                *ptr++ = 255;
 
133
                                        }
 
134
                                }
 
135
                        }
 
136
                        else
 
137
                        {
 
138
                                if (file->getSize()-file->getPos() < (long)(2*size)) // optimistic test
 
139
                                        return 0;
 
140
                                image = new CImage(ECF_A8R8G8B8, core::dimension2d<u32>(width, height));
 
141
                                if (image)
 
142
                                {
 
143
                                        u8* ptr = (u8*)image->lock();
 
144
                                        for (u32 i=0; i<size; ++i)
 
145
                                        {
 
146
                                                getNextToken(file, token);
 
147
                                                const u8 num = (u8)core::strtoul10(token.c_str());
 
148
                                                *ptr++ = num;
 
149
                                                *ptr++ = num;
 
150
                                                *ptr++ = num;
 
151
                                                *ptr++ = 255;
 
152
                                        }
 
153
                                }
 
154
                        }
 
155
                }
 
156
                else
 
157
                {
 
158
                        const u32 bytesize = 3*size;
 
159
                        if (binary)
 
160
                        {
 
161
                                if (file->getSize()-file->getPos() < (long)bytesize)
 
162
                                        return 0;
 
163
                                data = new u8[bytesize];
 
164
                                file->read(data, bytesize);
 
165
                                image = new CImage(ECF_A8R8G8B8, core::dimension2d<u32>(width, height));
 
166
                                if (image)
 
167
                                {
 
168
                                        u8* ptr = (u8*)image->lock();
 
169
                                        for (u32 i=0; i<size; ++i)
 
170
                                        {
 
171
                                                *ptr++ = data[3*i];
 
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                                                *ptr++ = data[3*i+1];
 
173
                                                *ptr++ = data[3*i+2];
 
174
                                                *ptr++ = 255;
 
175
                                        }
 
176
                                }
 
177
                        }
 
178
                        else
 
179
                        {
 
180
                                if (file->getSize()-file->getPos() < (long)(2*bytesize)) // optimistic test
 
181
                                        return 0;
 
182
                                image = new CImage(ECF_A8R8G8B8, core::dimension2d<u32>(width, height));
 
183
                                if (image)
 
184
                                {
 
185
                                        u8* ptr = (u8*)image->lock();
 
186
                                        for (u32 i=0; i<size; ++i)
 
187
                                        {
 
188
                                                getNextToken(file, token);
 
189
                                                *ptr++ = (u8)core::strtoul10(token.c_str());
 
190
                                                getNextToken(file, token);
 
191
                                                *ptr++ = (u8)core::strtoul10(token.c_str());
 
192
                                                getNextToken(file, token);
 
193
                                                *ptr++ = (u8)core::strtoul10(token.c_str());
 
194
                                                *ptr++ = 255;
 
195
                                        }
 
196
                                }
 
197
                        }
 
198
                }
 
199
        }
 
200
 
 
201
        if (image)
 
202
                image->unlock();
 
203
 
 
204
        delete [] data;
 
205
 
 
206
        return image;
 
207
}
 
208
 
 
209
 
 
210
//! read the next token from file
 
211
void CImageLoaderPPM::getNextToken(io::IReadFile* file, core::stringc& token) const
 
212
{
 
213
        token = "";
 
214
        c8 c;
 
215
        while(file->getPos()<file->getSize())
 
216
        {
 
217
                file->read(&c, 1);
 
218
                if (c=='#')
 
219
                {
 
220
                        while (c!='\n' && c!='\r' && (file->getPos()<file->getSize()))
 
221
                                file->read(&c, 1);
 
222
                }
 
223
                else if (!core::isspace(c))
 
224
                {
 
225
                        token.append(c);
 
226
                        break;
 
227
                }
 
228
        }
 
229
        while(file->getPos()<file->getSize())
 
230
        {
 
231
                file->read(&c, 1);
 
232
                if (c=='#')
 
233
                {
 
234
                        while (c!='\n' && c!='\r' && (file->getPos()<file->getSize()))
 
235
                                file->read(&c, 1);
 
236
                }
 
237
                else if (!core::isspace(c))
 
238
                        token.append(c);
 
239
                else
 
240
                        break;
 
241
        }
 
242
}
 
243
 
 
244
 
 
245
//! skip to next token (skip whitespace)
 
246
void CImageLoaderPPM::skipToNextToken(io::IReadFile* file) const
 
247
{
 
248
        c8 c;
 
249
        while(file->getPos()<file->getSize())
 
250
        {
 
251
                file->read(&c, 1);
 
252
                if (c=='#')
 
253
                {
 
254
                        while (c!='\n' && c!='\r' && (file->getPos()<file->getSize()))
 
255
                                file->read(&c, 1);
 
256
                }
 
257
                else if (!core::isspace(c))
 
258
                {
 
259
                        file->seek(-1, true); // put back
 
260
                        break;
 
261
                }
 
262
        }
 
263
}
 
264
 
 
265
 
 
266
//! creates a loader which is able to load windows bitmaps
 
267
IImageLoader* createImageLoaderPPM()
 
268
{
 
269
        return new CImageLoaderPPM;
 
270
}
 
271
 
 
272
 
 
273
} // end namespace video
 
274
} // end namespace irr
 
275
 
 
276
#endif
 
277