1 #include <msp/core/refptr.h>
2 #include <msp/io/file.h>
3 #include <msp/strings/format.h>
5 #include "imageloader.h"
7 #include "png/pngloader.h"
10 #include "jpeg/jpegloader.h"
13 #include "devil/devilloader.h"
16 #include "quartz/quartzloader.h"
24 ImageLoader::ImageLoader():
29 ImageLoader::~ImageLoader()
34 ImageLoader *ImageLoader::open_file(const string &fn)
38 RefPtr<IO::BufferedFile> file = new IO::BufferedFile(fn);
39 ImageLoader *loader = open_io(*file);
40 loader->source = file.release();
43 catch(const unsupported_image_format &e)
45 throw unsupported_image_format(format("%s: %s", fn, e.what()));
49 ImageLoader *ImageLoader::open_io(IO::Seekable &io)
51 Registry ®istry = get_registry();
54 registry.changed = false;
55 registry.loaders.sort(signature_size_compare);
58 if(registry.loaders.empty())
59 throw unsupported_image_format("no loaders");
61 vector<char> sig_buf(registry.loaders.back()->get_signature_size());
62 unsigned sig_len = io.read(&sig_buf[0], sig_buf.size());
63 string signature(sig_buf.begin(), sig_buf.end());
65 ImageLoader *loader = 0;
66 for(list<RegisterBase *>::const_iterator i=registry.loaders.begin(); (!loader && i!=registry.loaders.end()); ++i)
67 if((*i)->detect(signature))
68 loader = (*i)->create(io);
70 io.seek(0, IO::S_BEG);
75 for(unsigned i=0; i<sig_len; ++i)
79 sig_hex += format("%02X", static_cast<unsigned char>(sig_buf[i]));
81 throw unsupported_image_format(sig_hex);
87 void ImageLoader::load(Image::Data &data)
90 throw logic_error("already loaded");
92 if(state<HEADERS_LOADED)
98 void ImageLoader::load_headers(Image::Data &data)
100 if(state>=HEADERS_LOADED)
101 throw logic_error("headers already loaded");
104 state = HEADERS_LOADED;
107 ImageLoader::Registry &ImageLoader::get_registry()
109 static Registry registry;
110 static bool initialized = false;
114 register_loader<BmpLoader>();
116 register_loader<PngLoader>();
119 register_loader<JpegLoader>();
122 register_loader<DevilLoader>();
125 register_loader<QuartzLoader>();
131 bool ImageLoader::signature_size_compare(RegisterBase *r1, RegisterBase *r2)
133 return r1->get_signature_size()<r2->get_signature_size();
137 ImageLoader::Registry::Registry():
141 ImageLoader::Registry::~Registry()
143 for(list<RegisterBase *>::iterator i=loaders.begin(); i!=loaders.end(); ++i)
147 } // namespace Graphics