Merge branch 'master'

1 files changed, 284 insertions, 0 deletions

diff --git a/engines/dreamweb/vgafades.cpp b/engines/dreamweb/vgafades.cpp
new file mode 100644
index 0000000000..e8999ab18c
--- /dev/null
+++ b/engines/dreamweb/vgafades.cpp
@@ -0,0 +1,284 @@
+/* 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 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 "dreamweb/dreamweb.h"
+
+namespace DreamWeb {
+
+void DreamWebEngine::clearStartPal() {
+	memset(_startPal, 0, 256 * 3);
+}
+
+void DreamWebEngine::clearEndPal() {
+	memset(_endPal, 0, 256 * 3);
+}
+
+void DreamWebEngine::palToStartPal() {
+	memcpy(_startPal, _mainPal, 256 * 3);
+}
+
+void DreamWebEngine::endPalToStart() {
+	memcpy(_startPal, _endPal, 256 * 3);
+}
+
+void DreamWebEngine::startPalToEnd() {
+	memcpy(_endPal, _startPal, 256 * 3);
+}
+
+void DreamWebEngine::palToEndPal() {
+	memcpy(_endPal, _mainPal, 256 * 3);
+}
+
+void DreamWebEngine::fadeDOS() {
+	return; // FIXME later
+
+	waitForVSync();
+	//processEvents will be called from vsync
+	uint8 *dst = _startPal;
+	getPalette(dst, 0, 64);
+	for (int fade = 0; fade < 64; ++fade) {
+		for (int c = 0; c < 768; ++c) { //original sources decrement 768 values -> 256 colors
+			if (dst[c]) {
+				--dst[c];
+			}
+		}
+		setPalette(dst, 0, 64);
+		waitForVSync();
+	}
+}
+
+void DreamWebEngine::doFade() {
+	if (_fadeDirection == 0)
+		return;
+
+	processEvents();
+	uint8 *src = _startPal + 3 * _colourPos;
+	setPalette(src, _colourPos, _numToFade);
+
+	_colourPos += _numToFade;
+	if (_colourPos == 0)
+		fadeCalculation();
+}
+
+void DreamWebEngine::fadeCalculation() {
+	if (_fadeCount == 0) {
+		_fadeDirection = 0;
+		return;
+	}
+
+	uint8 *startPal = _startPal;
+	const uint8 *endPal = _endPal;
+	for (size_t i = 0; i < 256 * 3; ++i) {
+		uint8 s = startPal[i];
+		uint8 e = endPal[i];
+		if (s == e)
+			continue;
+		else if (s > e)
+			--startPal[i];
+		else {
+			if (_fadeCount <= e)
+				++startPal[i];
+		}
+	}
+	--_fadeCount;
+}
+
+void DreamWebEngine::fadeUpYellows() {
+	palToEndPal();
+	memset(_endPal + 231 * 3, 0, 8 * 3);
+	memset(_endPal + 246 * 3, 0, 1 * 3);
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 128;
+	hangOn(128);
+}
+
+void DreamWebEngine::fadeUpMonFirst() {
+	palToStartPal();
+	palToEndPal();
+	memset(_startPal + 231 * 3, 0, 8 * 3);
+	memset(_startPal + 246 * 3, 0, 1 * 3);
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 128;
+	hangOn(64);
+	playChannel1(26);
+	hangOn(64);
+}
+
+
+void DreamWebEngine::fadeDownMon() {
+	palToStartPal();
+	palToEndPal();
+	memset(_endPal + 231 * 3, 0, 8 * 3);
+	memset(_endPal + 246 * 3, 0, 1 * 3);
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 128;
+	hangOn(64);
+}
+
+void DreamWebEngine::fadeUpMon() {
+	palToStartPal();
+	palToEndPal();
+	memset(_startPal + 231 * 3, 0, 8 * 3);
+	memset(_startPal + 246 * 3, 0, 1 * 3);
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 128;
+	hangOn(128);
+}
+
+void DreamWebEngine::initialMonCols() {
+	palToStartPal();
+	memset(_startPal + 230 * 3, 0, 9 * 3);
+	memset(_startPal + 246 * 3, 0, 1 * 3);
+	processEvents();
+	setPalette(_startPal + 230 * 3, 230, 18);
+}
+
+void DreamWebEngine::fadeScreenUp() {
+	clearStartPal();
+	palToEndPal();
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 128;
+}
+
+void DreamWebEngine::fadeScreenUps() {
+	clearStartPal();
+	palToEndPal();
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 64;
+}
+
+void DreamWebEngine::fadeScreenUpHalf() {
+	endPalToStart();
+	palToEndPal();
+	_fadeDirection = 1;
+	_fadeCount = 31;
+	_colourPos = 0;
+	_numToFade = 32;
+}
+
+void DreamWebEngine::fadeScreenDown() {
+	palToStartPal();
+	clearEndPal();
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 128;
+}
+
+void DreamWebEngine::fadeScreenDowns() {
+	palToStartPal();
+	clearEndPal();
+	_fadeDirection = 1;
+	_fadeCount = 63;
+	_colourPos = 0;
+	_numToFade = 64;
+}
+
+void DreamWebEngine::fadeScreenDownHalf() {
+	palToStartPal();
+	palToEndPal();
+
+	const uint8 *startPal = _startPal;
+	uint8 *endPal = _endPal;
+	for (int i = 0; i < 256 * 3; ++i) {
+		*endPal >>= 1;
+		endPal++;
+	}
+
+	memcpy(endPal + (56*3), startPal + (56*3), 3*5);
+	memcpy(endPal + (77*3), startPal + (77*3), 3*2);
+
+	_fadeDirection = 1;
+	_fadeCount = 31;
+	_colourPos = 0;
+	_numToFade = 32;
+}
+
+
+void DreamWebEngine::clearPalette() {
+	_fadeDirection = 0;
+	clearStartPal();
+	dumpCurrent();
+}
+
+// Converts palette to grey scale, summed using formula
+// .20xred + .59xGreen + .11xBlue
+void DreamWebEngine::greyscaleSum() {
+	byte *src = _mainPal;
+	byte *dst = _endPal;
+
+	for (int i = 0; i < 256; ++i) {
+		const unsigned int r = 20 * *src++;
+		const unsigned int g = 59 * *src++;
+		const unsigned int b = 11 * *src++;
+		const byte grey = (r + b + g) / 100;
+		byte tmp;
+
+		tmp = grey;
+		//if (tmp != 0)	// FIXME: The assembler code has this check commented out. Bug or feature?
+			tmp += _addToRed;
+		*dst++ = tmp;
+
+		tmp = grey;
+		if (tmp != 0)
+			tmp += _addToGreen;
+		*dst++ = tmp;
+
+		tmp = grey;
+		if (tmp != 0)
+			tmp += _addToBlue;
+		*dst++ = tmp;
+	}
+}
+
+void DreamWebEngine::allPalette() {
+	memcpy(_startPal, _mainPal, 3 * 256);
+	dumpCurrent();
+}
+
+void DreamWebEngine::dumpCurrent() {
+	uint8 *pal = _startPal;
+
+	waitForVSync();
+	processEvents();
+	setPalette(pal, 0, 128);
+
+	pal += 128 * 3;
+
+	waitForVSync();
+	processEvents();
+	setPalette(pal, 128, 128);
+}
+
+} // End of namespace DreamWeb