PEGASUS: Add transition classes

1 files changed, 150 insertions, 0 deletions

diff --git a/engines/pegasus/transition.cpp b/engines/pegasus/transition.cpp
new file mode 100755
index 0000000000..20b9959358
--- /dev/null
+++ b/engines/pegasus/transition.cpp
@@ -0,0 +1,150 @@
+/* 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 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.
+ *
+ */
+
+#include "common/system.h"
+
+#include "pegasus/transition.h"
+
+namespace Pegasus {
+
+ScreenFader::ScreenFader() {
+	_fadeTarget = getBlack();
+	// Initially, assume screens are on at full brightness.
+	Fader::setFaderValue(100);
+}
+
+void ScreenFader::doFadeOutSync(const TimeValue duration, const TimeValue scale, const uint32 fadeTarget) {
+	_fadeTarget = fadeTarget;
+
+	FaderMoveSpec spec;
+	spec.makeTwoKnotFaderSpec(scale, 0, getFaderValue(), duration, 0);
+	startFaderSync(spec);
+}
+
+void ScreenFader::doFadeInSync(const TimeValue duration, const TimeValue scale, const uint32 fadeTarget) {
+	_fadeTarget = fadeTarget;
+
+	FaderMoveSpec spec;
+	spec.makeTwoKnotFaderSpec(scale, 0, getFaderValue(), duration, 100);
+	startFaderSync(spec);
+}
+
+void ScreenFader::setFaderValue(const uint32 value) {
+	if (value != getFaderValue()) {
+		Fader::setFaderValue(value);
+
+		// TODO: Gamma fading
+	}
+}
+
+uint32 ScreenFader::getBlack() {
+	return g_system->getScreenFormat().RGBToColor(0, 0, 0);
+}
+
+Transition::Transition(const tDisplayElementID id) : FaderAnimation(id) {
+	_outPicture = 0;
+	_inPicture = 0;
+}
+
+void Transition::setBounds(const Common::Rect &r) {
+	FaderAnimation::setBounds(r);
+	_boundsWidth = _bounds.width();
+	_boundsHeight = _bounds.height();
+}
+
+void Transition::setInAndOutElements(DisplayElement *inElement, DisplayElement *outElement) {
+	_inPicture = inElement;
+	_outPicture = outElement;
+
+	Common::Rect r;
+
+	if (_outPicture)
+		_outPicture->getBounds(r);
+	else if (_inPicture)
+		_inPicture->getBounds(r);
+
+	setBounds(r);
+}
+
+void Slide::draw(const Common::Rect &r) {
+	Common::Rect oldBounds, newBounds;
+	
+	adjustSlideRects(oldBounds, newBounds);
+	drawElements(r, oldBounds, newBounds);
+}
+
+void Slide::adjustSlideRects(Common::Rect &oldBounds, Common::Rect &newBounds) {
+	oldBounds = _bounds;
+	newBounds = _bounds;
+}
+
+void Slide::drawElements(const Common::Rect &drawRect, const Common::Rect &oldBounds, const Common::Rect &newBounds) {
+	drawSlideElement(drawRect, oldBounds, _outPicture);
+	drawSlideElement(drawRect, newBounds, _inPicture);
+}
+
+void Slide::drawSlideElement(const Common::Rect &drawRect, const Common::Rect &oldBounds, DisplayElement *picture) {
+	if (picture && drawRect.intersects(oldBounds)) {
+		picture->moveElementTo(oldBounds.left, oldBounds.top);
+		picture->draw(drawRect.findIntersectingRect(oldBounds));
+	}
+}
+
+void Push::adjustSlideRects(Common::Rect &oldBounds, Common::Rect &newBounds) {
+	switch (_direction & kSlideHorizMask) {
+		case kSlideLeftMask:
+			newBounds.left = oldBounds.right = _bounds.right - pegasusRound(getFaderValue() * _boundsWidth, kTransitionRange);
+			newBounds.right = newBounds.left + _boundsWidth;
+			oldBounds.left = oldBounds.right - _boundsWidth;
+			break;
+		case kSlideRightMask:
+			oldBounds.left = newBounds.right = _bounds.left + pegasusRound(getFaderValue() * _boundsWidth, kTransitionRange);
+			oldBounds.right = oldBounds.left + _boundsWidth;
+			newBounds.left = newBounds.right - _boundsWidth;
+			break;
+		default:
+			newBounds.left = oldBounds.left = _bounds.left;
+			newBounds.right = oldBounds.right = _bounds.right;
+			break;
+	}
+	switch (_direction & kSlideVertMask) {
+		case kSlideDownMask:
+			oldBounds.top = newBounds.bottom = _bounds.top + pegasusRound(getFaderValue() * _boundsHeight, kTransitionRange);
+			oldBounds.bottom = oldBounds.top + _boundsHeight;
+			newBounds.top = newBounds.bottom - _boundsHeight;
+			break;
+		case kSlideUpMask:
+			newBounds.top = oldBounds.bottom = _bounds.bottom - pegasusRound(getFaderValue() * _boundsHeight, kTransitionRange);
+			newBounds.bottom = newBounds.top + _boundsHeight;
+			oldBounds.top = oldBounds.bottom - _boundsHeight;
+			break;
+		default:
+			newBounds.top = oldBounds.top = _bounds.top;
+			newBounds.bottom = oldBounds.bottom = _bounds.bottom;
+			break;
+	}
+}
+
+} // End of namespace Pegasus