X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fgraphics%2Fimageloader.cpp;h=55d2dfb1b8f8c3f4cab2ebd3c9bcd93a0a0e547e;hb=e82345f2c1286e684789854c7dbe32411bb0b05f;hp=679f797adcc2bae5d7499c7cc41f6254ef3bb723;hpb=cfd3548464e6424fc9decf0539d6cd04b031ba10;p=libs%2Fgui.git

diff --git a/source/graphics/imageloader.cpp b/source/graphics/imageloader.cpp
index 679f797..55d2dfb 100644
--- a/source/graphics/imageloader.cpp
+++ b/source/graphics/imageloader.cpp
@@ -1,33 +1,47 @@
+#include "imageloader.h"
+#include <msp/core/algorithm.h>
 #include <msp/core/refptr.h>
 #include <msp/io/file.h>
 #include <msp/strings/format.h>
-#include "imageloader.h"
+#include <msp/strings/utils.h>
+#include "bmploader.h"
 #ifdef WITH_LIBPNG
 #include "png/pngloader.h"
 #endif
+#ifdef WITH_LIBJPEG
+#include "jpeg/jpegloader.h"
+#endif
 #ifdef WITH_DEVIL
 #include "devil/devilloader.h"
 #endif
+#ifdef WITH_QUARTZ
+#include "quartz/quartzloader.h"
+#endif
 
 using namespace std;
 
 namespace Msp {
 namespace Graphics {
 
-ImageLoader::ImageLoader():
-	source(0)
-{ }
-
 ImageLoader::~ImageLoader()
 {
 	delete source;
 }
 
+bool ImageLoader::detect_signature(const string &sig)
+{
+	Registry &registry = get_registry();
+	for(const RegisterBase *r: registry.loaders)
+		if(r->detect(sig))
+			return true;
+	return false;
+}
+
 ImageLoader *ImageLoader::open_file(const string &fn)
 {
 	try
 	{
-		RefPtr<IO::File> file = new IO::BufferedFile(fn);
+		RefPtr<IO::BufferedFile> file = new IO::BufferedFile(fn);
 		ImageLoader *loader = open_io(*file);
 		loader->source = file.release();
 		return loader;
@@ -38,38 +52,93 @@ ImageLoader *ImageLoader::open_file(const string &fn)
 	}
 }
 
-ImageLoader *ImageLoader::open_io(IO::Base &io)
+ImageLoader *ImageLoader::open_io(IO::Seekable &io)
 {
-	char sig_buf[8];
-	unsigned sig_len = io.read(sig_buf, sizeof(sig_buf));
-	string sig(sig_buf, sig_len);
-
-	// TODO register loader classes automatically
-	ImageLoader *loader = 0;
-	if(0)
-		;
-#ifdef WITH_LIBPNG
-	else if(PngLoader::detect(sig))
-		loader = new PngLoader(io, sig);
-#endif
-#ifdef WITH_DEVIL
-	else if(DevilLoader::detect(sig))
-		loader = new DevilLoader(io, sig);
-#endif
-	else
+	Registry &registry = get_registry();
+	if(registry.changed)
+	{
+		registry.changed = false;
+		sort(registry.loaders,  [](RegisterBase *r1, RegisterBase *r2){
+			return r1->get_signature_size()<r2->get_signature_size();
+		});
+	}
+
+	if(registry.loaders.empty())
+		throw unsupported_image_format("no loaders");
+
+	string signature(registry.loaders.back()->get_signature_size(), 0);
+	unsigned sig_len = io.read(&signature[0], signature.size());
+
+	ImageLoader *loader = nullptr;
+	for(auto i=registry.loaders.begin(); (!loader && i!=registry.loaders.end()); ++i)
+		if((*i)->detect(signature))
+			loader = (*i)->create(io);
+
+	io.seek(0, IO::S_BEG);
+
+	if(!loader)
 	{
 		string sig_hex;
 		for(unsigned i=0; i<sig_len; ++i)
-		{
-			if(i)
-				sig_hex += ' ';
-			sig_hex += format("%02X", static_cast<unsigned char>(sig_buf[i]));
-		}
+			append(sig_hex, " ", format("%02X", static_cast<unsigned char>(signature[i])));
 		throw unsupported_image_format(sig_hex);
 	}
 
 	return loader;
 }
 
+void ImageLoader::load(Image::Data &data)
+{
+	if(state>=FINISHED)
+		throw logic_error("already loaded");
+
+	if(state<HEADERS_LOADED)
+		load_headers_(data);
+	if(!data.pixels)
+		data.pixels = data.owned_pixels = new char[data.stride*data.height];
+	load_pixels_(data);
+	state = FINISHED;
+}
+
+void ImageLoader::load_headers(Image::Data &data)
+{
+	if(state>=HEADERS_LOADED)
+		throw logic_error("headers already loaded");
+
+	load_headers_(data);
+	state = HEADERS_LOADED;
+}
+
+ImageLoader::Registry &ImageLoader::get_registry()
+{
+	static Registry registry;
+	static bool initialized = false;
+	if(!initialized)
+	{
+		initialized = true;
+		register_loader<BmpLoader>();
+#ifdef WITH_LIBPNG
+		register_loader<PngLoader>();
+#endif
+#ifdef WITH_LIBJPEG
+		register_loader<JpegLoader>();
+#endif
+#ifdef WITH_DEVIL
+		register_loader<DevilLoader>();
+#endif
+#ifdef WITH_QUARTZ
+		register_loader<QuartzLoader>();
+#endif
+	}
+	return registry;
+}
+
+
+ImageLoader::Registry::~Registry()
+{
+	for(auto l: loaders)
+		delete l;
+}
+
 } // namespace Graphics
 } // namespace Msp