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engines/mm/xeen/screen.h

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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/>.
+ *
+ */
+
+#ifndef XEEN_SCREEN_H
+#define XEEN_SCREEN_H
+
+#include "common/rect.h"
+#include "graphics/screen.h"
+#include "mm/xeen/font.h"
+#include "mm/xeen/sprites.h"
+
+namespace MM {
+namespace Xeen {
+
+#define SCREEN_WIDTH 320
+#define SCREEN_HEIGHT 200
+#define PALETTE_COUNT 256
+#define PALETTE_SIZE (256 * 3)
+
+class XeenEngine;
+
+class Screen : public Graphics::Screen {
+private:
+	XeenEngine *_vm;
+	byte _mainPalette[PALETTE_SIZE];
+	byte _tempPalette[PALETTE_SIZE];
+	XSurface _pages[2];
+	XSurface _savedScreens[10];
+	bool _fadeIn;
+
+	/**
+	 * Mark the entire screen for drawing
+	 */
+	void drawScreen();
+
+	void fadeInner(int step);
+
+	void updatePalette();
+
+	void updatePalette(const byte *pal, int start, int count16);
+public:
+	Screen(XeenEngine *vm);
+	~Screen() override {
+	}
+
+	/**
+	 * Base method that descendent classes can override for recording affected
+	 * dirty areas of the surface
+	 */
+	void addDirtyRect(const Common::Rect &r) override {
+		Graphics::Screen::addDirtyRect(r);
+	}
+
+	/**
+	 * Load a palette resource into the temporary palette
+	 */
+	void loadPalette(const Common::Path &name);
+
+	/**
+	 * Load a background resource into memory
+	 */
+	void loadBackground(const Common::Path &name);
+
+	/**
+	 * Copy a loaded background into a display page
+	 */
+	void loadPage(int pageNum);
+
+	void freePages();
+
+	/**
+	 * Merge the two pages along a horizontal split point
+	 */
+	void horizMerge(int xp = 0);
+
+	/**
+	 * Merge the two pages along a vertical split point
+	 */
+	void vertMerge(int yp);
+
+	/**
+	 * Fades in the screen
+	 */
+	void fadeIn(int step = 4);
+
+	/**
+	 * Fades out the screen
+	 */
+	void fadeOut(int step = 4);
+
+	/**
+	 * Saves a copy of the current screen into a specified slot
+	 */
+	void saveBackground(int slot = 1);
+
+	/**
+	 * Restores a previously saved screen
+	 */
+	void restoreBackground(int slot = 1);
+
+	/**
+	 * Draws the scroll in the background
+	 * @param rollUp		If true, rolls up the scroll. If false, unrolls.
+	 * @param fadeInFlag	If true, does an initial fade in
+	 * @returns		True if key or mouse pressed
+	 */
+	bool doScroll(bool rollUp, bool fadeInFlag);
+};
+
+} // End of namespace Xeen
+} // End of namespace MM
+
+#endif