BACKENDS: Add initial code for DLC Manager

backends/dlc/android/playstore.h

@@ -0,0 +1,54 @@
+/* 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.
+*
+*/
+
+#ifndef BACKENDS_DLC_PLAYSTORE_PLAYSTORE_H
+#define BACKENDS_DLC_PLAYSTORE_PLAYSTORE_H
+
+#include "backends/dlc/store.h"
+#include "common/callback.h"
+
+namespace DLC {
+namespace PlayStore {
+
+class PlayStore: public DLC::Store {
+	
+public:	
+	PlayStore() {}
+	virtual ~PlayStore() {}
+	
+	virtual void init() override {}
+
+	virtual void requestInfo() override {}
+
+	virtual void getDownloadState() override {}
+
+	virtual void requestDownload() override {}
+
+	virtual void getBytesDownloaded() override {}
+
+	virtual void cancelDownload() override {}
+};
+
+} // End of namespace PlayStore
+} // End of namespace DLC
+
+#endif

backends/dlc/dlcmanager.cpp

@@ -0,0 +1,52 @@
+/* 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/>.
+ *
+ */
+
+
+#include "backends/dlc/dlcmanager.h"
+#include "backends/dlc/android/playstore.h"
+
+namespace Common {
+
+DECLARE_SINGLETON(DLC::DLCManager);
+
+}
+
+namespace DLC {
+
+DLCManager::DLCManager() {
+	// if --playstore flag
+	_store = new DLC::PlayStore::PlayStore();
+}
+
+void DLCManager::init() {
+
+}
+
+void DLCManager::initDownload() {
+	_store->requestDownload();
+	// handle errors
+}
+
+bool DLCManager::getFeatureState(DLC::Feature f) {
+	return false;
+}
+
+} // End of namespace DLC

backends/dlc/dlcmanager.h

@@ -0,0 +1,71 @@
+/* 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/>.
+ *
+ */
+
+#ifndef DLC_DLCMANAGER_H
+#define DLC_DLCMANAGER_H
+
+#include "common/str.h"
+#include "common/singleton.h"
+#include "backends/dlc/store.h"
+
+namespace DLC {
+
+enum Feature {
+	kInProgress
+};
+
+class DLCManager : public Common::Singleton<DLCManager> {
+
+	struct DLCDesc {
+		Common::String name;
+		Common::String description;
+		uint32 size;
+		uint32 game_id;
+	};
+
+	Store* _store;
+
+public:
+	DLCManager();
+	virtual ~DLCManager() {}
+
+	void init();
+
+	DLCDesc getDLCList();
+
+	void initDownload();
+
+	void cancelDownload();
+
+	bool getFeatureState(DLC::Feature f);
+	void setFeatureState(DLC::Feature f, bool enable);
+
+	void getPercentDownloaded();
+
+	uint32 getInProgressGame();
+};
+
+#define DLCMan        DLC::DLCManager::instance()
+
+} // End of namespace DLC
+
+
+#endif

backends/dlc/store.h

@@ -0,0 +1,49 @@
+/* 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/>.
+ *
+ */
+
+#ifndef DLC_STORE_H
+#define DLC_STORE_H
+
+namespace DLC {
+
+class Store {
+	
+public:
+	Store() {}
+	virtual ~Store() {}
+
+	virtual void init() = 0;
+
+	virtual void requestInfo() = 0;
+
+	virtual void getDownloadState() = 0;
+
+	virtual void requestDownload() = 0;
+
+	virtual void getBytesDownloaded() = 0;
+
+	virtual void cancelDownload() = 0;
+};
+
+} // End of namespace DLC
+
+
+#endif

backends/module.mk

@@ -5,6 +5,7 @@ MODULE_OBJS := \
 	modular-backend.o \
 	audiocd/audiocd-stream.o \
 	audiocd/default/default-audiocd.o \
+	dlc/dlcmanager.o \
 	events/default/default-events.o \
 	fs/abstract-fs.o \
 	fs/stdiostream.o \

backends/platform/android/android.cpp

@@ -637,6 +637,7 @@ bool OSystem_Android::hasFeature(Feature f) {
 			f == kFeatureTouchscreen) {
 		return true;
 	}
+	if (f == kFeatureDLC) return true;
 	/* Even if we are using the 2D graphics manager,
 	 * we are at one initGraphics3d call of supporting GLES2 */
 	if (f == kFeatureOpenGLForGame) return true;

base/main.cpp

@@ -71,6 +71,7 @@
 #include "backends/keymapper/action.h"
 #include "backends/keymapper/keymap.h"
 #include "backends/keymapper/keymapper.h"
+#include "backends/dlc/dlcmanager.h"
 
 #ifdef USE_CLOUD
 #ifdef USE_LIBCURL
@@ -699,6 +700,8 @@ extern "C" int scummvm_main(int argc, const char * const argv[]) {
 	CloudMan.syncSaves();
 #endif
 
+	DLCMan.init();
+
 	// Unless a game was specified, show the launcher dialog
 	if (nullptr == ConfMan.getActiveDomain())
 		launcherDialog();
@@ -848,6 +851,7 @@ extern "C" int scummvm_main(int argc, const char * const argv[]) {
 	Cloud::CloudManager::destroy();
 #endif
 #endif
+	DLC::DLCManager::destroy();
 	PluginManager::instance().unloadDetectionPlugin();
 	PluginManager::instance().unloadAllPlugins();
 	PluginManager::destroy();

common/system.h

@@ -569,6 +569,11 @@ public:
 		*/
 		kFeatureShaders,
 
+		/**
+		* Support for downloading DLC packages.
+		*/
+		kFeatureDLC,
+
 		/**
 		* Support for using the native system file browser dialog
 		* through the DialogManager.

gui/launcher.cpp

@@ -256,8 +256,11 @@ void LauncherDialog::build() {
 	new ButtonWidget(this, _title + ".AboutButton", _("A~b~out"), _("About ScummVM"), kAboutCmd);
 	// I18N: Button caption. O is the shortcut, Ctrl+O, put it in parens for non-latin (~O~)
 	new ButtonWidget(this, _title + ".OptionsButton", _("Global ~O~ptions..."), _("Change global ScummVM options"), kOptionsCmd, 0, _c("Global ~O~pts...", "lowres"));
-	// I18N: Button download games button.
-	new ButtonWidget(this, _title + ".DownloadGamesButton", _("Download Games"), _("Download freeware games for ScummVM"), kDownloadGameCmd);
+
+	if (g_system->hasFeature(OSystem::kFeatureDLC)) {
+	// I18N: Button browse downloadable games (DLC)
+		new ButtonWidget(this, _title + ".DownloadGamesButton", _("Download Games"), _("Download freeware games for ScummVM"), kDownloadGameCmd);
+	}
 
 	// Above the lowest button rows: two more buttons (directly below the list box)
 	DropdownButtonWidget *addButton =