After the GUI has finished, restore the old cursor palette (if any). For this

to work, cursor palette now has to be set using the new "palette manager". See
graphics/paletteman.cpp

svn-id: r22543

3 files changed, 188 insertions, 0 deletions

diff --git a/graphics/module.mk b/graphics/module.mk
index 89b32fac19..1bf6536448 100644
--- a/graphics/module.mk
+++ b/graphics/module.mk
@@ -11,6 +11,7 @@ MODULE_OBJS := \
 	ilbm.o \
 	imagedec.o \
 	imageman.o \
+	paletteman.o \
 	primitives.o \
 	scaler.o \
 	scaler/thumbnail.o \
diff --git a/graphics/paletteman.cpp b/graphics/paletteman.cpp
new file mode 100644
index 0000000000..a41691b618
--- /dev/null
+++ b/graphics/paletteman.cpp
@@ -0,0 +1,93 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2006 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 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 "graphics/paletteman.h"
+
+#include "common/system.h"
+#include "common/stack.h"
+
+DECLARE_SINGLETON(Graphics::PaletteManager);
+
+namespace Graphics {
+
+static bool g_initialized = false;
+
+PaletteManager::PaletteManager() {
+	if (!g_initialized) {
+		_cursorPaletteStack.clear();
+	}
+}
+
+void PaletteManager::pushCursorPalette(const byte *colors, uint start, uint num) {
+	if (!g_system->hasFeature(OSystem::kFeatureCursorHasPalette))
+		return;
+
+	Palette *pal = new Palette;
+
+	pal->colors = new byte[4 * num];
+	pal->start = start;
+	pal->num = num;
+	memcpy(pal->colors, colors, 4 * num);
+
+	_cursorPaletteStack.push(pal);
+
+	g_system->setCursorPalette(colors, start, num);
+}
+
+void PaletteManager::popCursorPalette() {
+	if (!g_system->hasFeature(OSystem::kFeatureCursorHasPalette))
+		return;
+
+	if (_cursorPaletteStack.empty())
+		return;
+
+	Palette *pal;
+
+	pal = _cursorPaletteStack.pop();
+	delete pal;
+
+	if (_cursorPaletteStack.empty()) {
+		g_system->disableCursorPalette(true);
+		return;
+	}
+
+	pal = _cursorPaletteStack.top();
+	g_system->setCursorPalette(pal->colors, pal->start, pal->num);
+}
+
+void PaletteManager::replaceCursorPalette(const byte *colors, uint start, uint num) {
+	if (!g_system->hasFeature(OSystem::kFeatureCursorHasPalette))
+		return;
+
+	if (_cursorPaletteStack.empty()) {
+		pushCursorPalette(colors, start, num);
+		return;
+	}
+
+	Palette *pal = _cursorPaletteStack.pop();
+
+	delete pal->colors;
+	pal->colors = new byte[4 * num];
+	pal->start = start;
+	pal->num = num;
+}
+
+} // End of namespace Graphics
diff --git a/graphics/paletteman.h b/graphics/paletteman.h
new file mode 100644
index 0000000000..5663d7d3a7
--- /dev/null
+++ b/graphics/paletteman.h
@@ -0,0 +1,94 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2006 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 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.
+ *
+ * $URL$
+ * $Id$
+ */
+
+#ifndef GRAPHICS_PALETTEMAN_H
+#define GRAPHICS_PALETTEMAN_H
+
+#include "common/stdafx.h"
+#include "common/scummsys.h"
+#include "common/stack.h"
+#include "common/singleton.h"
+
+namespace Graphics {
+
+class PaletteManager : public Common::Singleton<PaletteManager> {
+public:
+	/**
+	 * Push a new cursor palette onto the stack, and set it in the backend.
+	 * The palette entries from 'start' till (start+num-1) will be replaced
+	 * so a full palette updated is accomplished via start=0, num=256.
+	 *
+	 * The palette data is specified in the same interleaved RGBA format as
+	 * used by all backends.
+	 *
+	 * @param colors	the new palette data, in interleaved RGB format
+	 * @param start		the first palette entry to be updated
+	 * @param num		the number of palette entries to be updated
+	 */
+	void pushCursorPalette(const byte *colors, uint start, uint num);
+
+	/**
+	 * Pop a cursor palette from the stack, and restore the previous one to
+	 * the backend. If there is no previous palette, the cursor palette is
+	 * disabled instead.
+	 */
+	void popCursorPalette();
+
+	/**
+	 * Replace the current cursor palette on the stack. If the stack is
+	 * empty, the palette is pushed instead.
+	 *
+	 * @param colors	the new palette data, in interleaved RGB format
+	 * @param start		the first palette entry to be updated
+	 * @param num		the number of palette entries to be updated
+	 */
+	void replaceCursorPalette(const byte *colors, uint start, uint num);
+
+private:
+	friend class Common::Singleton<SingletonBaseType>;
+	PaletteManager();
+
+	struct Palette {
+		byte *colors;
+		uint start;
+		uint num;
+
+		Palette() {
+			colors = NULL;
+			start = 0;
+			num = 0;
+		}
+
+		~Palette() {
+			delete [] colors;
+		}
+	};
+
+	Common::Stack<Palette *> _cursorPaletteStack;
+};
+
+
+} // End of namespace Graphics
+
+/** Shortcut for accessing the font manager. */
+#define PaletteMan	(Graphics::PaletteManager::instance())
+
+#endif