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backends/graphics/atari/atari-cursor.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 BACKENDS_GRAPHICS_ATARI_CURSOR_H
+#define BACKENDS_GRAPHICS_ATARI_CURSOR_H
+
+#include "graphics/surface.h"
+
+class AtariSurface;
+
+// Global state consists of:
+//	- palette (used for the overlay only atm)
+//	- shape (surface, dimensions, hotspot, keycolor)
+//	- visibility
+// These always get updates by ScummVM, no need to differentiate between engines and the overlay.
+
+struct Cursor {
+	~Cursor();
+
+	void reset(AtariSurface* screenSurf, const Graphics::Surface *boundingSurf) {
+		_screenSurf = screenSurf;
+		_boundingSurf = boundingSurf;
+
+		_positionChanged = true;
+		_surfaceChanged = true;
+		_visibilityChanged = false;
+
+		_savedRect = _alignedDstRect = Common::Rect();
+	}
+
+	// updates outOfScreen OR srcRect/dstRect (only if visible/needed)
+	void update();
+
+	// visibility
+	bool setVisible(bool visible) {
+		if (_visible == visible) {
+			return _visible;
+		}
+
+		bool last = _visible;
+
+		_visible = visible;
+
+		_visibilityChanged = true;
+
+		return last;
+	}
+	void setSurfaceChanged() {
+		_surfaceChanged = true;
+	}
+
+	// position
+	Common::Point getPosition() const {
+		return Common::Point(_x, _y);
+	}
+	void setPosition(int x, int y) {
+		//atari_debug("Cursor::setPosition: %d, %d", x, y);
+
+		if (_x == x && _y == y)
+			return;
+
+		_x = x;
+		_y = y;
+
+		_positionChanged = true;
+	}
+	void updatePosition(int deltaX, int deltaY);
+
+	// surface
+	static void setSurface(const void *buf, int w, int h, int hotspotX, int hotspotY, uint32 keycolor);
+	static void setPalette(const byte *colors, uint start, uint num);
+
+	bool isVisible() const {
+		return !_outOfScreen && _visible;
+	}
+	bool isChanged() const {
+		return _positionChanged || _surfaceChanged || _visibilityChanged;
+	}
+
+	Common::Rect flushBackground(const Common::Rect &alignedRect, bool directRendering);
+	void saveBackground();
+	void draw();
+
+private:
+	static void convertSurfaceTo(const Graphics::PixelFormat &format);
+	void restoreBackground();
+
+	AtariSurface *_screenSurf;
+	const Graphics::Surface *_boundingSurf = nullptr;
+
+	bool _positionChanged = false;
+	bool _surfaceChanged = false;
+	bool _visibilityChanged = false;
+
+	bool _visible = false;
+	int _x = 0;
+	int _y = 0;
+	bool _outOfScreen = true;
+	Common::Rect _srcRect;
+	Common::Rect _dstRect;
+
+	Graphics::Surface _savedBackground;
+	Common::Rect _savedRect;
+	Common::Rect _alignedDstRect;
+
+	// related to 'surface'
+	static bool _globalSurfaceChanged;
+
+	static byte _palette[256*3];
+
+	static const byte *_buf;
+	static int _width;
+	static int _height;
+	static int _hotspotX;
+	static int _hotspotY;
+	static uint32 _keycolor;
+
+	static Graphics::Surface _surface;
+	static Graphics::Surface _surfaceMask;
+};
+
+#endif // BACKENDS_GRAPHICS_ATARI_CURSOR_H