Last part of patch #1163026 (Thumbnails for ScummEngine)

svn-id: r17982

7 files changed, 320 insertions, 10 deletions

diff --git a/scumm/dialogs.cpp b/scumm/dialogs.cpp
index e77142a073..6f92e75359 100644
--- a/scumm/dialogs.cpp
+++ b/scumm/dialogs.cpp
@@ -22,6 +22,7 @@
 
 #include "common/config-manager.h"
 #include "common/system.h"
+#include "common/scaler.h"
 
 #include "gui/chooser.h"
 #include "gui/newgui.h"
@@ -147,7 +148,6 @@ static ResString string_map_table_v5[] = {
 
 #pragma mark -
 
-
 const Common::String ScummDialog::queryResString(int stringno) {
 	byte buf[256];
 	byte *result;
@@ -199,7 +199,7 @@ enum {
 	kQuitCmd = 'QUIT'
 };
 
-class SaveLoadChooser : public GUI::ChooserDialog {
+class SaveLoadChooser : public GUI::ChooserDialog, public BaseSaveLoadChooser {
 	typedef Common::String String;
 	typedef Common::StringList StringList;
 protected:
@@ -210,6 +210,8 @@ public:
 	
 	virtual void handleCommand(CommandSender *sender, uint32 cmd, uint32 data);
 	const String &getResultString() const;
+	void setList(const StringList& list) { GUI::ChooserDialog::setList(list); }
+	int runModal() { return GUI::ChooserDialog::runModal(); }
 };
 
 SaveLoadChooser::SaveLoadChooser(const String &title, const String &buttonLabel, bool saveMode)
@@ -250,6 +252,115 @@ void SaveLoadChooser::handleCommand(CommandSender *sender, uint32 cmd, uint32 da
 	}
 }
 
+#pragma mark -
+
+enum {
+	kChooseCmd = 'Chos'
+};
+
+// only for use with >= 640x400 resolutions
+class SaveLoadChooserEx : public GUI::Dialog, public BaseSaveLoadChooser {
+	typedef Common::String String;
+	typedef Common::StringList StringList;
+protected:
+	bool _saveMode;
+	GUI::ListWidget		*_list;
+	GUI::ButtonWidget	*_chooseButton;
+	GUI::GraphicsWidget	*_gfxWidget;
+	ScummEngine			*_scumm;
+
+public:
+	SaveLoadChooserEx(const String &title, const String &buttonLabel, bool saveMode, ScummEngine *engine);
+	
+	virtual void handleCommand(CommandSender *sender, uint32 cmd, uint32 data);
+	const String &getResultString() const;	
+	void setList(const StringList& list);
+	int runModal();
+
+	bool wantsScaling() const { return false; }
+};
+
+SaveLoadChooserEx::SaveLoadChooserEx(const String &title, const String &buttonLabel, bool saveMode, ScummEngine *engine)
+	: Dialog(8, 8, engine->_system->getOverlayWidth() - 2 * 8, engine->_system->getOverlayHeight() - 16), _saveMode(saveMode), _list(0), _chooseButton(0), _gfxWidget(0), _scumm(engine) {
+	
+	new StaticTextWidget(this, 10, 6, _w - 2 * 10, kLineHeight, title, kTextAlignCenter);
+	
+	// Add choice list
+	_list = new GUI::ListWidget(this, 10, 18, _w - 2 * 10 - 180, _h - 14 - 24 - 10);
+	_list->setEditable(saveMode);
+	_list->setNumberingMode(saveMode ? GUI::kListNumberingOne : GUI::kListNumberingZero);
+	
+	// Add the thumbnail display
+	_gfxWidget = new GUI::GraphicsWidget(this,
+			_w - (kThumbnailWidth + 22),
+			18,
+			kThumbnailWidth + 8,
+			((_scumm->_system->getHeight() % 200 && _scumm->_system->getHeight() != 350) ? kThumbnailHeight2 : kThumbnailHeight1) + 8);
+	_gfxWidget->setFlags(GUI::WIDGET_BORDER);
+	
+	// Buttons
+	addButton(_w - 2 * (kButtonWidth + 10), _h - 24, "Cancel", kCloseCmd, 0);
+	_chooseButton = addButton(_w-(kButtonWidth + 10), _h - 24, buttonLabel, kChooseCmd, 0);
+	_chooseButton->setEnabled(false);
+}
+
+const Common::String &SaveLoadChooserEx::getResultString() const {
+	return _list->getSelectedString();
+}
+
+void SaveLoadChooserEx::setList(const StringList& list) {
+	_list->setList(list);
+}
+
+int SaveLoadChooserEx::runModal() {
+	_gfxWidget->setGfx(0);
+	int ret = GUI::Dialog::runModal();
+	return ret;
+}
+
+void SaveLoadChooserEx::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
+	int selItem = _list->getSelected();
+	switch (cmd) {
+	case GUI::kListItemActivatedCmd:
+	case GUI::kListItemDoubleClickedCmd:
+		if (selItem >= 0) {
+			if (_saveMode || !getResultString().isEmpty()) {
+				_list->endEditMode();
+				setResult(selItem);
+				close();
+			}
+		}
+		break;
+	case kChooseCmd:
+		_list->endEditMode();
+		setResult(selItem);
+		close();
+		break;
+	case GUI::kListSelectionChangedCmd: {
+		const Graphics::Surface *thumb;
+		thumb = _scumm->loadThumbnailFromSlot(_saveMode ? selItem + 1 : selItem);
+		_gfxWidget->setGfx(thumb);
+		delete thumb;
+		_gfxWidget->draw();
+
+		if (_saveMode) {
+			_list->startEditMode();
+		}
+		// Disable button if nothing is selected, or (in load mode) if an empty
+		// list item is selected. We allow choosing an empty item in save mode
+		// because we then just assign a default name.
+		_chooseButton->setEnabled(selItem >= 0 && (_saveMode || !getResultString().isEmpty()));
+		_chooseButton->draw();
+	} break;
+	case kCloseCmd:
+		setResult(-1);
+	default:
+		GUI::Dialog::handleCommand(sender, cmd, data);
+	}
+}
+
+#pragma mark -
+
 Common::StringList generateSavegameList(ScummEngine *scumm, bool saveMode) {
 	// Get savegame names
 	Common::StringList l;
@@ -308,8 +419,13 @@ MainMenuDialog::MainMenuDialog(ScummEngine *scumm)
 #ifndef DISABLE_HELP
 	_helpDialog = new HelpDialog(scumm);
 #endif
-	_saveDialog = new SaveLoadChooser("Save game:", "Save", true);
-	_loadDialog = new SaveLoadChooser("Load game:", "Load", false);
+	if (scumm->_system->getOverlayWidth() <= 320) {
+		_saveDialog = new SaveLoadChooser("Save game:", "Save", true);
+		_loadDialog = new SaveLoadChooser("Load game:", "Load", false);
+	} else {
+		_saveDialog = new SaveLoadChooserEx("Save game:", "Save", true, scumm);
+		_loadDialog = new SaveLoadChooserEx("Load game:", "Load", false, scumm);
+	}
 }
 
 MainMenuDialog::~MainMenuDialog() {
diff --git a/scumm/dialogs.h b/scumm/dialogs.h
index 158e599fb7..5913686ae4 100644
--- a/scumm/dialogs.h
+++ b/scumm/dialogs.h
@@ -54,7 +54,18 @@ protected:
 	const String queryResString(int stringno);
 };
 
-class SaveLoadChooser;
+// to have a base for all different Save/Load Choosers
+// currently only for SaveLoadChooser (320x200)
+// and for SaveLoadChooserEx (640x400/640x480)
+class BaseSaveLoadChooser
+{
+public:
+	virtual ~BaseSaveLoadChooser() {};
+	
+	virtual const Common::String &getResultString() const = 0;
+	virtual void setList(const Common::StringList& list) = 0;
+	virtual int runModal() = 0;
+};
 
 class MainMenuDialog : public ScummDialog {
 public:
@@ -68,8 +79,8 @@ protected:
 #ifndef DISABLE_HELP
 	GUI::Dialog		*_helpDialog;
 #endif
-	SaveLoadChooser	*_saveDialog;
-	SaveLoadChooser	*_loadDialog;
+	BaseSaveLoadChooser	*_saveDialog;
+	BaseSaveLoadChooser	*_loadDialog;
 
 	void save();
 	void load();
diff --git a/scumm/module.mk b/scumm/module.mk
index 16d28947fc..98fce55c52 100644
--- a/scumm/module.mk
+++ b/scumm/module.mk
@@ -79,7 +79,8 @@ MODULE_OBJS := \
 	scumm/smush/smush_player.o \
 	scumm/smush/saud_channel.o \
 	scumm/smush/smush_mixer.o \
-	scumm/smush/smush_font.o
+	scumm/smush/smush_font.o \
+	scumm/thumbnail.o
 
 MODULE_DIRS += \
 	scumm \
diff --git a/scumm/saveload.cpp b/scumm/saveload.cpp
index 406db2f37a..8dc0039969 100644
--- a/scumm/saveload.cpp
+++ b/scumm/saveload.cpp
@@ -83,6 +83,7 @@ bool ScummEngine::saveState(int slot, bool compat) {
 	hdr.ver = TO_LE_32(CURRENT_VER);
 
 	out->write(&hdr, sizeof(hdr));
+	saveThumbnail(out);
 
 	Serializer ser(0, out, CURRENT_VER);
 	saveOrLoad(&ser, CURRENT_VER);
@@ -126,6 +127,18 @@ bool ScummEngine::loadState(int slot, bool compat) {
 		delete in;
 		return false;
 	}
+	
+	// Sine version 52 a thumbnail is saved directly after the header
+	if (hdr.ver >= VER(52)) {
+		uint32 type = in->readUint32BE();
+		if (type != MKID('THMB')) {
+			warning("Can not load thumbnail");
+			delete in;
+			return false;
+		}
+		uint32 size = in->readUint32BE();
+		in->skip(size - 8);
+	}
 
 	// Due to a bug in scummvm up to and including 0.3.0, save games could be saved
 	// in the V8/V9 format but were tagged with a V7 mark. Ouch. So we just pretend V7 == V8 here
@@ -387,6 +400,36 @@ bool ScummEngine::getSavegameName(int slot, char *desc) {
 	return true;
 }
 
+Graphics::Surface *ScummEngine::loadThumbnailFromSlot(int slot) {
+	char filename[256];
+	InSaveFile *in;
+	SaveGameHeader hdr;
+	int len;
+	
+	makeSavegameName(filename, slot, false);
+	if (!(in = _saveFileMan->openForLoading(filename))) {
+		return 0;
+	}
+	len = in->read(&hdr, sizeof(hdr));
+
+	if (len != sizeof(hdr) || hdr.type != MKID('SCVM')) {
+		delete in;
+		return 0;
+	}
+
+	if (hdr.ver > CURRENT_VER)
+		hdr.ver = TO_LE_32(hdr.ver);
+	if (hdr.ver < VER(52)) {
+		delete in;
+		return 0;
+	}
+
+	Graphics::Surface *thumb = loadThumbnail(in);
+
+	delete in;
+	return thumb;
+}
+
 void ScummEngine::saveOrLoad(Serializer *s, uint32 savegameVersion) {
 	const SaveLoadEntry objectEntries[] = {
 		MKLINE(ObjectData, OBIMoffset, sleUint32, VER(8)),
diff --git a/scumm/saveload.h b/scumm/saveload.h
index 046813867d..79cfb43cef 100644
--- a/scumm/saveload.h
+++ b/scumm/saveload.h
@@ -43,7 +43,7 @@ namespace Scumm {
  * only saves/loads those which are valid for the version of the savegame
  * which is being loaded/saved currently.
  */
-#define CURRENT_VER 51
+#define CURRENT_VER 52
 
 /**
  * An auxillary macro, used to specify savegame versions. We use this instead
diff --git a/scumm/scumm.h b/scumm/scumm.h
index 7ff3d5fc12..91fc9b5901 100644
--- a/scumm/scumm.h
+++ b/scumm/scumm.h
@@ -27,6 +27,7 @@
 #include "common/file.h"
 #include "common/rect.h"
 #include "common/str.h"
+#include "graphics/surface.h"
 
 #include "scumm/gfx.h"
 #include "scumm/script.h"
@@ -36,7 +37,8 @@ namespace GUI {
 }
 using GUI::Dialog;
 class GameDetector;
-
+class InSaveFile;
+class OutSaveFile;
 
 namespace Scumm {
 
@@ -579,6 +581,14 @@ public:
 	void requestSave(int slot, const char *name, bool temporary = false);
 	void requestLoad(int slot);
 
+// thumbnail stuff
+public:
+	Graphics::Surface *loadThumbnailFromSlot(int slot);
+
+protected:
+	Graphics::Surface *loadThumbnail(InSaveFile *file);
+	void saveThumbnail(OutSaveFile *file);
+
 protected:
 	/* Script VM - should be in Script class */
 	uint32 _localScriptOffsets[1024];
diff --git a/scumm/thumbnail.cpp b/scumm/thumbnail.cpp
new file mode 100644
index 0000000000..dbe21698ed
--- /dev/null
+++ b/scumm/thumbnail.cpp
@@ -0,0 +1,129 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001  Ludvig Strigeus
+ * Copyright (C) 2001-2005 The ScummVM project
+ *
+ * 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 file 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+ 
+#include "common/stdafx.h"
+#include "common/scummsys.h"
+#include "common/system.h"
+#include "common/savefile.h"
+#include "common/scaler.h"
+#include "scumm.h"
+
+namespace Scumm {
+
+#define THMB_VERSION 1
+
+#if !defined(__GNUC__)
+	#pragma START_PACK_STRUCTS
+#endif
+
+struct ThumbnailHeader {
+	uint32 type;
+	uint32 size;
+	byte version;
+	uint16 width, height;
+	byte bpp;
+} GCC_PACK;
+
+#if !defined(__GNUC__)
+	#pragma END_PACK_STRUCTS
+#endif
+
+
+inline void colorToRGB(uint16 color, uint8 &r, uint8 &g, uint8 &b) {
+	r = (((color >> 11) & 0x1F) << 3);
+	g = (((color >> 5) & 0x3F) << 2);
+	b = ((color&0x1F) << 3);
+}
+
+Graphics::Surface *ScummEngine::loadThumbnail(InSaveFile *file) {
+	ThumbnailHeader header;
+	header.type = file->readUint32BE();
+	if (header.type != MKID('THMB'))
+		return 0;
+
+	header.size = file->readUint32BE();
+	header.version = file->readByte();
+
+	if (header.version > THMB_VERSION) {
+		file->skip(header.size - 9);
+		warning("Loading a newer thumbnail version");
+		return 0;
+	}
+
+	header.width = file->readUint16BE();
+	header.height = file->readUint16BE();
+	header.bpp = file->readByte();
+	
+	// TODO: support other bpp values than 2
+	if (header.bpp != 2) {
+		file->skip(header.size - 14);
+		return 0;
+	}
+	
+	Graphics::Surface *thumb = new Graphics::Surface();
+	thumb->create(header.width, header.height, sizeof(uint16));
+
+	uint16* pixels = (uint16 *)thumb->pixels;
+
+	for (int y = 0; y < thumb->h; ++y) {
+		for (int x = 0; x < thumb->w; ++x) {
+			uint8 r, g, b;
+			colorToRGB(file->readUint16BE(), r, g, b);
+			
+			// converting to current OSystem Color
+			*pixels++ = _system->RGBToColor(r, g, b);
+		}
+	}
+
+	return thumb;
+}
+
+void ScummEngine::saveThumbnail(OutSaveFile *file) {
+	Graphics::Surface thumb;
+ 
+	if (!createThumbnailFromScreen(&thumb))
+		thumb.create(kThumbnailWidth, kThumbnailHeight2, sizeof(uint16));
+	
+	ThumbnailHeader header;
+	header.type = MKID('THMB');
+	header.size = sizeof(header) + thumb.w*thumb.h*thumb.bytesPerPixel;
+	header.version = THMB_VERSION;
+	header.width = thumb.w;
+	header.height = thumb.h;
+	header.bpp = thumb.bytesPerPixel;
+
+	file->writeUint32BE(header.type);
+	file->writeUint32BE(header.size);
+	file->writeByte(header.version);
+	file->writeUint16BE(header.width);
+	file->writeUint16BE(header.height);
+	file->writeByte(header.bpp);
+	
+	// TODO: for later this shouldn't be casted to uint16...
+	uint16* pixels = (uint16 *)thumb.pixels;
+	for (uint16 p = 0; p < thumb.w*thumb.h; ++p, ++pixels)
+		file->writeUint16BE(*pixels);
+
+	thumb.free();
+}
+
+} // end of namespace Scumm