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/* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES)
#include "backends/plugins/dynamic-plugin.h"
#include "common/fs.h"
#include "dcloader.h"
#include "dcutils.h"
static void drawPluginProgress(const Common::String &filename)
{
TextureStack txstack;
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();
}
class OSystem_Dreamcast::DCPlugin : public DynamicPlugin {
protected:
void *_dlHandle;
DiscLabel _label;
virtual VoidFunc findSymbol(const char *symbol) {
void *func = dlsym(_dlHandle, symbol);
if (!func)
warning("Failed loading symbol '%s' from plugin '%s' (%s)", symbol, _filename.toString(Common::Path::kNativeSeparator).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;
}
void checkDisc(const DiscLabel &);
public:
DCPlugin(const Common::Path &filename)
: DynamicPlugin(filename), _dlHandle(0) {}
bool loadPlugin() {
assert(!_dlHandle);
DiscLabel original;
checkDisc(_label);
drawPluginProgress(_filename.toString(Common::Path::kNativeSeparator));
_dlHandle = dlopen(_filename.toString(Common::Path::kNativeSeparator).c_str(), RTLD_LAZY);
if (!_dlHandle) {
checkDisc(original);
warning("Failed loading plugin '%s' (%s)", _filename.toString(Common::Path::kNativeSeparator).c_str(), dlerror());
return false;
}
bool ret = DynamicPlugin::loadPlugin();
if (ret)
dlforgetsyms(_dlHandle);
checkDisc(original);
return ret;
}
void unloadPlugin() {
DynamicPlugin::unloadPlugin();
if (_dlHandle) {
if (dlclose(_dlHandle) != 0)
warning("Failed unloading plugin '%s' (%s)", _filename.toString(Common::Path::kNativeSeparator).c_str(), dlerror());
_dlHandle = 0;
}
}
};
void OSystem_Dreamcast::DCPlugin::checkDisc(const DiscLabel &target)
{
for (;;) {
DiscLabel current;
if (current == target)
return;
char buf[32+24];
Common::strcpy_s(buf, "Please insert disc '");
target.get(buf+strlen(buf));
Common::strcat_s(buf, "'");
DiscSwap(buf, 0xffffffff).run();
}
}
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;
}
void OSystem_Dreamcast::addCustomDirectories(Common::FSList &dirs) const
{
FilePluginProvider::addCustomDirectories(dirs);
if (pluginCustomDirectory != NULL)
dirs.push_back(Common::FSNode(pluginCustomDirectory));
}
PluginList OSystem_Dreamcast::getPlugins()
{
pluginCustomDirectory = NULL;
PluginList list = FilePluginProvider::getPlugins();
if (list.empty()) {
Common::String selection;
if (selectPluginDir(selection, Common::FSNode("plugins"))) {
pluginCustomDirectory = selection.c_str();
list = FilePluginProvider::getPlugins();
pluginCustomDirectory = NULL;
}
}
return list;
}
#endif // defined(DYNAMIC_MODULES)
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