1 files changed, 136 insertions, 0 deletions
diff --git a/backends/platform/dc/plugins.cpp b/backends/platform/dc/plugins.cpp
new file mode 100644
index 0000000000..44b8960513
--- /dev/null
+++ b/backends/platform/dc/plugins.cpp
@@ -0,0 +1,136 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/scummsys.h"
+
+#if defined(DYNAMIC_MODULES)
+
+#include "backends/plugins/dynamic-plugin.h"
+#include "common/fs.h"
+
+#include "dcloader.h"
+
+extern void draw_solid_quad(float x1, float y1, float x2, float y2,
+			    int c0, int c1, int c2, int c3);
+
+static void drawPluginProgress(const Common::String &filename)
+{
+  ta_sync();
+  void *mark = ta_txmark();
+  const char *fn = filename.c_str();
+  Label lab1, lab2, lab3;
+  char buf[32];
+  unsigned memleft = 0x8cf00000-((unsigned)sbrk(0));
+  float ffree = memleft*(1.0/(16<<20));
+  int fcol = (memleft < (1<<20)? 0xffff0000:
+	      (memleft < (4<<20)? 0xffffff00: 0xff00ff00));
+  snprintf(buf, sizeof(buf), "%dK free memory", memleft>>10);
+  if (fn[0] == '/') fn++;
+  lab1.create_texture("Loading plugins, please wait...");
+  lab2.create_texture(fn);
+  lab3.create_texture(buf);
+  ta_begin_frame();
+  draw_solid_quad(80.0, 270.0, 560.0, 300.0,
+		  0xff808080, 0xff808080, 0xff808080, 0xff808080);
+  draw_solid_quad(85.0, 275.0, 555.0, 295.0, 
+		  0xff202020, 0xff202020, 0xff202020, 0xff202020);
+  draw_solid_quad(85.0, 275.0, 85.0+470.0*ffree, 295.0,
+		  fcol, fcol, fcol, fcol);
+  ta_commit_end();
+  lab1.draw(100.0, 150.0, 0xffffffff);
+  lab2.draw(100.0, 190.0, 0xffaaffaa);
+  lab3.draw(100.0, 230.0, 0xffffffff);
+  ta_commit_frame();
+  ta_sync();
+  ta_txrelease(mark);
+}
+
+
+class OSystem_Dreamcast::DCPlugin : public DynamicPlugin {
+protected:
+	void *_dlHandle;
+
+	virtual VoidFunc findSymbol(const char *symbol) {
+		void *func = dlsym(_dlHandle, symbol);
+		if (!func)
+			warning("Failed loading symbol '%s' from plugin '%s' (%s)", symbol, _filename.c_str(), dlerror());
+
+		// FIXME HACK: This is a HACK to circumvent a clash between the ISO C++
+		// standard and POSIX: ISO C++ disallows casting between function pointers
+		// and data pointers, but dlsym always returns a void pointer. For details,
+		// see e.g. <http://www.trilithium.com/johan/2004/12/problem-with-dlsym/>.
+		assert(sizeof(VoidFunc) == sizeof(func));
+		VoidFunc tmp;
+		memcpy(&tmp, &func, sizeof(VoidFunc));
+		return tmp;
+	}
+
+public:
+	DCPlugin(const Common::String &filename)
+		: DynamicPlugin(filename), _dlHandle(0) {}
+
+	bool loadPlugin() {
+		assert(!_dlHandle);
+		drawPluginProgress(_filename);
+		_dlHandle = dlopen(_filename.c_str(), RTLD_LAZY);
+
+		if (!_dlHandle) {
+			warning("Failed loading plugin '%s' (%s)", _filename.c_str(), dlerror());
+			return false;
+		}
+
+		bool ret = DynamicPlugin::loadPlugin();
+
+		if (ret)
+			dlforgetsyms(_dlHandle);
+
+		return ret;
+	}
+
+	void unloadPlugin() {
+		DynamicPlugin::unloadPlugin();
+		if (_dlHandle) {
+			if (dlclose(_dlHandle) != 0)
+				warning("Failed unloading plugin '%s' (%s)", _filename.c_str(), dlerror());
+			_dlHandle = 0;
+		}
+	}
+};
+
+
+Plugin* OSystem_Dreamcast::createPlugin(const Common::FSNode &node) const {
+	return new DCPlugin(node.getPath());
+}
+
+bool OSystem_Dreamcast::isPluginFilename(const Common::FSNode &node) const {
+	// Check the plugin suffix
+	Common::String filename = node.getName();
+	if (!filename.hasSuffix(".PLG"))
+		return false;
+
+	return true;
+}
+
+#endif // defined(DYNAMIC_MODULES)