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 bool ImageLoader::registered_loaders_changed = false;
26 ImageLoader::ImageLoader():
30 ImageLoader::~ImageLoader()
35 ImageLoader *ImageLoader::open_file(const string &fn)
39 RefPtr<IO::BufferedFile> file = new IO::BufferedFile(fn);
40 ImageLoader *loader = open_io(*file);
41 loader->source = file.release();
44 catch(const unsupported_image_format &e)
46 throw unsupported_image_format(format("%s: %s", fn, e.what()));
50 ImageLoader *ImageLoader::open_io(IO::Seekable &io)
52 (void)RegisteredImageLoader<BmpLoader>::reg;
54 (void)RegisteredImageLoader<PngLoader>::reg;
57 (void)RegisteredImageLoader<JpegLoader>::reg;
60 (void)RegisteredImageLoader<DevilLoader>::reg;
63 (void)RegisteredImageLoader<QuartzLoader>::reg;
66 list<RegisterBase *> &loaders = get_registered_loaders();
67 if(registered_loaders_changed)
69 registered_loaders_changed = false;
70 loaders.sort(signature_size_compare);
74 throw unsupported_image_format("no loaders");
76 vector<char> sig_buf(loaders.back()->get_signature_size());
77 unsigned sig_len = io.read(&sig_buf[0], sig_buf.size());
78 string signature(sig_buf.begin(), sig_buf.end());
80 ImageLoader *loader = 0;
81 for(list<RegisterBase *>::const_iterator i=loaders.begin(); (!loader && i!=loaders.end()); ++i)
82 if((*i)->detect(signature))
83 loader = (*i)->create(io);
85 io.seek(0, IO::S_BEG);
90 for(unsigned i=0; i<sig_len; ++i)
94 sig_hex += format("%02X", static_cast<unsigned char>(sig_buf[i]));
96 throw unsupported_image_format(sig_hex);
103 ImageLoader::RegisterBase::RegisterBase()
105 get_registered_loaders().push_back(this);
106 registered_loaders_changed = true;
110 list<ImageLoader::RegisterBase *> &ImageLoader::get_registered_loaders()
112 static list<RegisterBase *> regs;
116 bool ImageLoader::signature_size_compare(RegisterBase *r1, RegisterBase *r2)
118 return r1->get_signature_size()<r2->get_signature_size();
121 } // namespace Graphics