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engines/pegasus/transition.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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * 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 PEGASUS_TRANSITION_H
+#define PEGASUS_TRANSITION_H
+
+#include "pegasus/fader.h"
+
+namespace Graphics {
+struct Surface;
+}
+
+namespace Pegasus {
+
+class ScreenFader : public Fader {
+public:
+	ScreenFader();
+	~ScreenFader() override;
+
+	void doFadeOutSync(const TimeValue = kOneSecondPerThirtyTicks, const TimeScale = kThirtyTicksPerSecond, bool isBlack = true);
+	void doFadeInSync(const TimeValue = kHalfSecondPerThirtyTicks, const TimeScale = kThirtyTicksPerSecond, bool isBlack = true);
+
+	void setFaderValue(const int32) override;
+
+private:
+	bool _isBlack;
+	uint32 fadePixel(uint32 color, int32 percent) const;
+	Graphics::Surface _screen;
+};
+
+// Transitions are faders that range over [0,1000], which makes their
+// "resolution" one tenth of a percent
+
+static const int kTransitionBottom = 0;
+static const int kTransitionTop = 1000;
+
+static const int kTransitionRange = kTransitionTop - kTransitionBottom;
+
+class Transition : public FaderAnimation {
+public:
+	Transition(const DisplayElementID id);
+	~Transition() override {}
+
+	void setBounds(const Common::Rect &) override;
+
+	virtual void setInAndOutElements(DisplayElement *, DisplayElement *);
+	DisplayElement *getInElement() { return _inPicture; }
+	DisplayElement *getOutElement() { return _outPicture; }
+
+protected:
+	DisplayElement *_outPicture;
+	DisplayElement *_inPicture;
+
+	CoordType _boundsWidth, _boundsHeight;
+};
+
+class Slide : public Transition {
+public:
+	Slide(const DisplayElementID id) : Transition(id) {}
+	~Slide() override {}
+
+	virtual void setSlideDirection(SlideDirection dir) { _direction = dir; }
+	void draw(const Common::Rect &) override;
+
+	virtual void setDirection(const SlideDirection dir) { _direction = dir; }
+
+protected:
+	virtual void adjustSlideRects(Common::Rect &, Common::Rect &);
+	virtual void drawElements(const Common::Rect &, const Common::Rect &, const Common::Rect &);
+	virtual void drawSlideElement(const Common::Rect &, const Common::Rect &, DisplayElement *);
+
+	SlideDirection _direction;
+};
+
+class Push : public Slide {
+public:
+	Push(const DisplayElementID id) : Slide(id) {}
+	~Push() override {}
+
+protected:
+	void adjustSlideRects(Common::Rect &, Common::Rect &) override;
+};
+
+} // End of namespace Pegasus
+
+#endif