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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 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/sound.h"
#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 waitForVSync
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);
_sound->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
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