mirror of
https://github.com/libretro/scummvm.git
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577 lines
18 KiB
C++
577 lines
18 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/endian.h"
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#include "common/util.h"
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#include "scumm/bomp.h"
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#include "scumm/smush/codec37.h"
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namespace Scumm {
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Codec37Decoder::Codec37Decoder(int width, int height) {
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_width = width;
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_height = height;
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_frameSize = _width * _height;
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_deltaSize = _frameSize * 3 + 0x13600;
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_deltaBuf = (byte *)calloc(_deltaSize, sizeof(byte));
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if (_deltaBuf == 0)
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error("unable to allocate decoder buffer");
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_deltaBufs[0] = _deltaBuf + 0x4D80;
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_deltaBufs[1] = _deltaBuf + 0xE880 + _frameSize;
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_offsetTable = new int16[255];
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if (_offsetTable == 0)
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error("unable to allocate decoder offset table");
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_curtable = 0;
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_prevSeqNb = 0;
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_tableLastPitch = -1;
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_tableLastIndex = -1;
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}
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Codec37Decoder::~Codec37Decoder() {
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if (_offsetTable) {
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delete[] _offsetTable;
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_offsetTable = 0;
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_tableLastPitch = -1;
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_tableLastIndex = -1;
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}
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if (_deltaBuf) {
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free(_deltaBuf);
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_deltaSize = 0;
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_deltaBuf = 0;
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_deltaBufs[0] = 0;
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_deltaBufs[1] = 0;
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}
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}
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void Codec37Decoder::maketable(int pitch, int index) {
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static const int8 maketable_bytes[] = {
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0, 0, 1, 0, 2, 0, 3, 0, 5, 0,
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8, 0, 13, 0, 21, 0, -1, 0, -2, 0,
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-3, 0, -5, 0, -8, 0, -13, 0, -17, 0,
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-21, 0, 0, 1, 1, 1, 2, 1, 3, 1,
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5, 1, 8, 1, 13, 1, 21, 1, -1, 1,
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-2, 1, -3, 1, -5, 1, -8, 1, -13, 1,
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-17, 1, -21, 1, 0, 2, 1, 2, 2, 2,
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3, 2, 5, 2, 8, 2, 13, 2, 21, 2,
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-1, 2, -2, 2, -3, 2, -5, 2, -8, 2,
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-13, 2, -17, 2, -21, 2, 0, 3, 1, 3,
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2, 3, 3, 3, 5, 3, 8, 3, 13, 3,
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21, 3, -1, 3, -2, 3, -3, 3, -5, 3,
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-8, 3, -13, 3, -17, 3, -21, 3, 0, 5,
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1, 5, 2, 5, 3, 5, 5, 5, 8, 5,
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13, 5, 21, 5, -1, 5, -2, 5, -3, 5,
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-5, 5, -8, 5, -13, 5, -17, 5, -21, 5,
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0, 8, 1, 8, 2, 8, 3, 8, 5, 8,
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8, 8, 13, 8, 21, 8, -1, 8, -2, 8,
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-3, 8, -5, 8, -8, 8, -13, 8, -17, 8,
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-21, 8, 0, 13, 1, 13, 2, 13, 3, 13,
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5, 13, 8, 13, 13, 13, 21, 13, -1, 13,
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-2, 13, -3, 13, -5, 13, -8, 13, -13, 13,
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-17, 13, -21, 13, 0, 21, 1, 21, 2, 21,
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3, 21, 5, 21, 8, 21, 13, 21, 21, 21,
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-1, 21, -2, 21, -3, 21, -5, 21, -8, 21,
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-13, 21, -17, 21, -21, 21, 0, -1, 1, -1,
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2, -1, 3, -1, 5, -1, 8, -1, 13, -1,
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21, -1, -1, -1, -2, -1, -3, -1, -5, -1,
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-8, -1, -13, -1, -17, -1, -21, -1, 0, -2,
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1, -2, 2, -2, 3, -2, 5, -2, 8, -2,
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13, -2, 21, -2, -1, -2, -2, -2, -3, -2,
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-5, -2, -8, -2, -13, -2, -17, -2, -21, -2,
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0, -3, 1, -3, 2, -3, 3, -3, 5, -3,
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8, -3, 13, -3, 21, -3, -1, -3, -2, -3,
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-3, -3, -5, -3, -8, -3, -13, -3, -17, -3,
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-21, -3, 0, -5, 1, -5, 2, -5, 3, -5,
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5, -5, 8, -5, 13, -5, 21, -5, -1, -5,
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-2, -5, -3, -5, -5, -5, -8, -5, -13, -5,
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-17, -5, -21, -5, 0, -8, 1, -8, 2, -8,
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3, -8, 5, -8, 8, -8, 13, -8, 21, -8,
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-1, -8, -2, -8, -3, -8, -5, -8, -8, -8,
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-13, -8, -17, -8, -21, -8, 0, -13, 1, -13,
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2, -13, 3, -13, 5, -13, 8, -13, 13, -13,
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21, -13, -1, -13, -2, -13, -3, -13, -5, -13,
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-8, -13, -13, -13, -17, -13, -21, -13, 0, -17,
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1, -17, 2, -17, 3, -17, 5, -17, 8, -17,
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13, -17, 21, -17, -1, -17, -2, -17, -3, -17,
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-5, -17, -8, -17, -13, -17, -17, -17, -21, -17,
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0, -21, 1, -21, 2, -21, 3, -21, 5, -21,
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8, -21, 13, -21, 21, -21, -1, -21, -2, -21,
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-3, -21, -5, -21, -8, -21, -13, -21, -17, -21,
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0, 0, -8, -29, 8, -29, -18, -25, 17, -25,
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0, -23, -6, -22, 6, -22, -13, -19, 12, -19,
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0, -18, 25, -18, -25, -17, -5, -17, 5, -17,
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-10, -15, 10, -15, 0, -14, -4, -13, 4, -13,
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19, -13, -19, -12, -8, -11, -2, -11, 0, -11,
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2, -11, 8, -11, -15, -10, -4, -10, 4, -10,
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15, -10, -6, -9, -1, -9, 1, -9, 6, -9,
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-29, -8, -11, -8, -8, -8, -3, -8, 3, -8,
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8, -8, 11, -8, 29, -8, -5, -7, -2, -7,
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0, -7, 2, -7, 5, -7, -22, -6, -9, -6,
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-6, -6, -3, -6, -1, -6, 1, -6, 3, -6,
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6, -6, 9, -6, 22, -6, -17, -5, -7, -5,
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-4, -5, -2, -5, 0, -5, 2, -5, 4, -5,
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7, -5, 17, -5, -13, -4, -10, -4, -5, -4,
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-3, -4, -1, -4, 0, -4, 1, -4, 3, -4,
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5, -4, 10, -4, 13, -4, -8, -3, -6, -3,
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-4, -3, -3, -3, -2, -3, -1, -3, 0, -3,
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1, -3, 2, -3, 4, -3, 6, -3, 8, -3,
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-11, -2, -7, -2, -5, -2, -3, -2, -2, -2,
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-1, -2, 0, -2, 1, -2, 2, -2, 3, -2,
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5, -2, 7, -2, 11, -2, -9, -1, -6, -1,
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-4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
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1, -1, 2, -1, 3, -1, 4, -1, 6, -1,
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9, -1, -31, 0, -23, 0, -18, 0, -14, 0,
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-11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
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-2, 0, -1, 0, 0, -31, 1, 0, 2, 0,
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3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
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14, 0, 18, 0, 23, 0, 31, 0, -9, 1,
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-6, 1, -4, 1, -3, 1, -2, 1, -1, 1,
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0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
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6, 1, 9, 1, -11, 2, -7, 2, -5, 2,
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-3, 2, -2, 2, -1, 2, 0, 2, 1, 2,
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2, 2, 3, 2, 5, 2, 7, 2, 11, 2,
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-8, 3, -6, 3, -4, 3, -2, 3, -1, 3,
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0, 3, 1, 3, 2, 3, 3, 3, 4, 3,
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6, 3, 8, 3, -13, 4, -10, 4, -5, 4,
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-3, 4, -1, 4, 0, 4, 1, 4, 3, 4,
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5, 4, 10, 4, 13, 4, -17, 5, -7, 5,
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-4, 5, -2, 5, 0, 5, 2, 5, 4, 5,
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7, 5, 17, 5, -22, 6, -9, 6, -6, 6,
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-3, 6, -1, 6, 1, 6, 3, 6, 6, 6,
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9, 6, 22, 6, -5, 7, -2, 7, 0, 7,
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2, 7, 5, 7, -29, 8, -11, 8, -8, 8,
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-3, 8, 3, 8, 8, 8, 11, 8, 29, 8,
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-6, 9, -1, 9, 1, 9, 6, 9, -15, 10,
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-4, 10, 4, 10, 15, 10, -8, 11, -2, 11,
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0, 11, 2, 11, 8, 11, 19, 12, -19, 13,
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-4, 13, 4, 13, 0, 14, -10, 15, 10, 15,
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-5, 17, 5, 17, 25, 17, -25, 18, 0, 18,
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-12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
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-17, 25, 18, 25, -8, 29, 8, 29, 0, 31,
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0, 0, -6, -22, 6, -22, -13, -19, 12, -19,
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0, -18, -5, -17, 5, -17, -10, -15, 10, -15,
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0, -14, -4, -13, 4, -13, 19, -13, -19, -12,
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-8, -11, -2, -11, 0, -11, 2, -11, 8, -11,
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-15, -10, -4, -10, 4, -10, 15, -10, -6, -9,
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-1, -9, 1, -9, 6, -9, -11, -8, -8, -8,
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-3, -8, 0, -8, 3, -8, 8, -8, 11, -8,
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-5, -7, -2, -7, 0, -7, 2, -7, 5, -7,
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-22, -6, -9, -6, -6, -6, -3, -6, -1, -6,
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1, -6, 3, -6, 6, -6, 9, -6, 22, -6,
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-17, -5, -7, -5, -4, -5, -2, -5, -1, -5,
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0, -5, 1, -5, 2, -5, 4, -5, 7, -5,
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17, -5, -13, -4, -10, -4, -5, -4, -3, -4,
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-2, -4, -1, -4, 0, -4, 1, -4, 2, -4,
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3, -4, 5, -4, 10, -4, 13, -4, -8, -3,
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-6, -3, -4, -3, -3, -3, -2, -3, -1, -3,
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0, -3, 1, -3, 2, -3, 3, -3, 4, -3,
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6, -3, 8, -3, -11, -2, -7, -2, -5, -2,
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-4, -2, -3, -2, -2, -2, -1, -2, 0, -2,
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1, -2, 2, -2, 3, -2, 4, -2, 5, -2,
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7, -2, 11, -2, -9, -1, -6, -1, -5, -1,
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-4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
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1, -1, 2, -1, 3, -1, 4, -1, 5, -1,
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6, -1, 9, -1, -23, 0, -18, 0, -14, 0,
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-11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
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-2, 0, -1, 0, 0, -23, 1, 0, 2, 0,
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3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
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14, 0, 18, 0, 23, 0, -9, 1, -6, 1,
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-5, 1, -4, 1, -3, 1, -2, 1, -1, 1,
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0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
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5, 1, 6, 1, 9, 1, -11, 2, -7, 2,
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-5, 2, -4, 2, -3, 2, -2, 2, -1, 2,
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0, 2, 1, 2, 2, 2, 3, 2, 4, 2,
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5, 2, 7, 2, 11, 2, -8, 3, -6, 3,
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-4, 3, -3, 3, -2, 3, -1, 3, 0, 3,
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1, 3, 2, 3, 3, 3, 4, 3, 6, 3,
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8, 3, -13, 4, -10, 4, -5, 4, -3, 4,
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-2, 4, -1, 4, 0, 4, 1, 4, 2, 4,
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3, 4, 5, 4, 10, 4, 13, 4, -17, 5,
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-7, 5, -4, 5, -2, 5, -1, 5, 0, 5,
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1, 5, 2, 5, 4, 5, 7, 5, 17, 5,
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-22, 6, -9, 6, -6, 6, -3, 6, -1, 6,
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1, 6, 3, 6, 6, 6, 9, 6, 22, 6,
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-5, 7, -2, 7, 0, 7, 2, 7, 5, 7,
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-11, 8, -8, 8, -3, 8, 0, 8, 3, 8,
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8, 8, 11, 8, -6, 9, -1, 9, 1, 9,
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6, 9, -15, 10, -4, 10, 4, 10, 15, 10,
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-8, 11, -2, 11, 0, 11, 2, 11, 8, 11,
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19, 12, -19, 13, -4, 13, 4, 13, 0, 14,
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-10, 15, 10, 15, -5, 17, 5, 17, 0, 18,
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-12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
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};
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if (_tableLastPitch == pitch && _tableLastIndex == index)
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return;
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_tableLastPitch = pitch;
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_tableLastIndex = index;
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index *= 255;
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assert(index + 254 < (int32)(sizeof(maketable_bytes) / 2));
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for (int32 i = 0; i < 255; i++) {
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int32 j = (i + index) * 2;
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_offsetTable[i] = maketable_bytes[j + 1] * pitch + maketable_bytes[j];
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}
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}
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#if defined(SCUMM_NEED_ALIGNMENT)
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#define DECLARE_LITERAL_TEMP(v) \
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byte v
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#define READ_LITERAL_PIXEL(src, v) \
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v = *src++
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#define WRITE_4X1_LINE(dst, v) \
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do { \
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int j; \
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for (j=0; j<4; j++) \
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(dst)[j] = v; \
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} while (0)
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#define COPY_4X1_LINE(dst, src) \
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do { \
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int j; \
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for (j=0; j<4; j++) \
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(dst)[j] = (src)[j]; \
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} while (0)
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#else /* SCUMM_NEED_ALIGNMENT */
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#define DECLARE_LITERAL_TEMP(v) \
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uint32 v
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#define READ_LITERAL_PIXEL(src, v) \
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do { \
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v = *src++; \
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v += (v << 8) + (v << 16) + (v << 24); \
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} while (0)
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#define WRITE_4X1_LINE(dst, v) \
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*(uint32 *)(dst) = v
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#define COPY_4X1_LINE(dst, src) \
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*(uint32 *)(dst) = *(const uint32 *)(src)
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#endif /* SCUMM_NEED_ALIGNMENT */
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/* Fill a 4x4 pixel block with a literal pixel value */
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#define LITERAL_4X4(src, dst, pitch) \
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do { \
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int x; \
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DECLARE_LITERAL_TEMP(t); \
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READ_LITERAL_PIXEL(src, t); \
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for (x=0; x<4; x++) { \
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WRITE_4X1_LINE(dst + pitch * x, t); \
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} \
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dst += 4; \
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} while (0)
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/* Fill four 4x1 pixel blocks with literal pixel values */
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#define LITERAL_4X1(src, dst, pitch) \
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do { \
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int x; \
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DECLARE_LITERAL_TEMP(t); \
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for (x=0; x<4; x++) { \
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READ_LITERAL_PIXEL(src, t); \
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WRITE_4X1_LINE(dst + pitch * x, t); \
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} \
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dst += 4; \
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} while (0)
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/* Fill sixteen 1x1 pixel blocks with literal pixel values */
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#define LITERAL_1X1(src, dst, pitch) \
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do { \
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int x; \
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for (x=0; x<4; x++) { \
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COPY_4X1_LINE(dst + pitch * x, src); \
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src += 4; \
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} \
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dst += 4; \
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} while (0)
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/* Copy a 4x4 pixel block from a different place in the framebuffer */
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#define COPY_4X4(dst2, dst, pitch) \
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do { \
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int x; \
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for (x=0; x<4; x++) { \
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COPY_4X1_LINE(dst + pitch * x, dst2 + pitch * x); \
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} \
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dst += 4; \
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} while (0)
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void Codec37Decoder::proc1(byte *dst, const byte *src, int32 next_offs, int bw, int bh, int pitch, int16 *offset_table) {
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uint8 code;
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bool filling, skipCode;
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int32 len;
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int i, p;
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uint32 pitches[16];
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i = bw;
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for (p = 0; p < 16; ++p) {
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pitches[p] = (p >> 2) * pitch + (p & 0x3);
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}
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code = 0;
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filling = false;
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len = -1;
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while (1) {
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if (len < 0) {
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filling = (*src & 1) == 1;
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len = *src++ >> 1;
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skipCode = false;
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} else {
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skipCode = true;
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}
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if (!filling || !skipCode) {
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code = *src++;
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if (code == 0xFF) {
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--len;
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for (p = 0; p < 0x10; ++p) {
|
|
if (len < 0) {
|
|
filling = (*src & 1) == 1;
|
|
len = *src++ >> 1;
|
|
if (filling) {
|
|
code = *src++;
|
|
}
|
|
}
|
|
if (filling) {
|
|
*(dst + pitches[p]) = code;
|
|
} else {
|
|
*(dst + pitches[p]) = *src++;
|
|
}
|
|
--len;
|
|
}
|
|
dst += 4;
|
|
--i;
|
|
if (i == 0) {
|
|
dst += pitch * 3;
|
|
--bh;
|
|
if (bh == 0) return;
|
|
i = bw;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
byte *dst2 = dst + offset_table[code] + next_offs;
|
|
COPY_4X4(dst2, dst, pitch);
|
|
--i;
|
|
if (i == 0) {
|
|
dst += pitch * 3;
|
|
--bh;
|
|
if (bh == 0) return;
|
|
i = bw;
|
|
}
|
|
--len;
|
|
}
|
|
}
|
|
|
|
void Codec37Decoder::proc3WithFDFE(byte *dst, const byte *src, int32 next_offs, int bw, int bh, int pitch, int16 *offset_table) {
|
|
do {
|
|
int32 i = bw;
|
|
do {
|
|
int32 code = *src++;
|
|
if (code == 0xFD) {
|
|
LITERAL_4X4(src, dst, pitch);
|
|
} else if (code == 0xFE) {
|
|
LITERAL_4X1(src, dst, pitch);
|
|
} else if (code == 0xFF) {
|
|
LITERAL_1X1(src, dst, pitch);
|
|
} else {
|
|
byte *dst2 = dst + _offsetTable[code] + next_offs;
|
|
COPY_4X4(dst2, dst, pitch);
|
|
}
|
|
} while (--i);
|
|
dst += pitch * 3;
|
|
} while (--bh);
|
|
}
|
|
|
|
void Codec37Decoder::proc3WithoutFDFE(byte *dst, const byte *src, int32 next_offs, int bw, int bh, int pitch, int16 *offset_table) {
|
|
do {
|
|
int32 i = bw;
|
|
do {
|
|
int32 code = *src++;
|
|
if (code == 0xFF) {
|
|
LITERAL_1X1(src, dst, pitch);
|
|
} else {
|
|
byte *dst2 = dst + _offsetTable[code] + next_offs;
|
|
COPY_4X4(dst2, dst, pitch);
|
|
}
|
|
} while (--i);
|
|
dst += pitch * 3;
|
|
} while (--bh);
|
|
}
|
|
|
|
void Codec37Decoder::proc4WithFDFE(byte *dst, const byte *src, int32 next_offs, int bw, int bh, int pitch, int16 *offset_table) {
|
|
do {
|
|
int32 i = bw;
|
|
do {
|
|
int32 code = *src++;
|
|
if (code == 0xFD) {
|
|
LITERAL_4X4(src, dst, pitch);
|
|
} else if (code == 0xFE) {
|
|
LITERAL_4X1(src, dst, pitch);
|
|
} else if (code == 0xFF) {
|
|
LITERAL_1X1(src, dst, pitch);
|
|
} else if (code == 0x00) {
|
|
int32 length = *src++ + 1;
|
|
for (int32 l = 0; l < length; l++) {
|
|
byte *dst2 = dst + next_offs;
|
|
COPY_4X4(dst2, dst, pitch);
|
|
i--;
|
|
if (i == 0) {
|
|
dst += pitch * 3;
|
|
bh--;
|
|
i = bw;
|
|
}
|
|
}
|
|
if (bh == 0) {
|
|
return;
|
|
}
|
|
i++;
|
|
} else {
|
|
byte *dst2 = dst + _offsetTable[code] + next_offs;
|
|
COPY_4X4(dst2, dst, pitch);
|
|
}
|
|
} while (--i);
|
|
dst += pitch * 3;
|
|
} while (--bh);
|
|
}
|
|
|
|
void Codec37Decoder::proc4WithoutFDFE(byte *dst, const byte *src, int32 next_offs, int bw, int bh, int pitch, int16 *offset_table) {
|
|
do {
|
|
int32 i = bw;
|
|
do {
|
|
int32 code = *src++;
|
|
if (code == 0xFF) {
|
|
LITERAL_1X1(src, dst, pitch);
|
|
} else if (code == 0x00) {
|
|
int32 length = *src++ + 1;
|
|
for (int32 l = 0; l < length; l++) {
|
|
byte *dst2 = dst + next_offs;
|
|
COPY_4X4(dst2, dst, pitch);
|
|
i--;
|
|
if (i == 0) {
|
|
dst += pitch * 3;
|
|
bh--;
|
|
i = bw;
|
|
}
|
|
}
|
|
if (bh == 0) {
|
|
return;
|
|
}
|
|
i++;
|
|
} else {
|
|
byte *dst2 = dst + _offsetTable[code] + next_offs;
|
|
COPY_4X4(dst2, dst, pitch);
|
|
}
|
|
} while (--i);
|
|
dst += pitch * 3;
|
|
} while (--bh);
|
|
}
|
|
|
|
void Codec37Decoder::decode(byte *dst, const byte *src) {
|
|
int32 bw = (_width + 3) / 4, bh = (_height + 3) / 4;
|
|
int32 pitch = bw * 4;
|
|
|
|
int16 seq_nb = READ_LE_UINT16(src + 2);
|
|
int32 decoded_size = READ_LE_UINT32(src + 4);
|
|
byte mask_flags = src[12];
|
|
maketable(pitch, src[1]);
|
|
int32 tmp;
|
|
|
|
switch (src[0]) {
|
|
case 0:
|
|
if ((_deltaBufs[_curtable] - _deltaBuf) > 0) {
|
|
memset(_deltaBuf, 0, _deltaBufs[_curtable] - _deltaBuf);
|
|
}
|
|
tmp = (_deltaBuf + _deltaSize) - _deltaBufs[_curtable] - decoded_size;
|
|
if (tmp > 0) {
|
|
memset(_deltaBufs[_curtable] + decoded_size, 0, tmp);
|
|
}
|
|
memcpy(_deltaBufs[_curtable], src + 16, decoded_size);
|
|
break;
|
|
case 1:
|
|
if ((seq_nb & 1) || !(mask_flags & 1)) {
|
|
_curtable ^= 1;
|
|
}
|
|
proc1(_deltaBufs[_curtable], src + 16, _deltaBufs[_curtable ^ 1] - _deltaBufs[_curtable],
|
|
bw, bh, pitch, _offsetTable);
|
|
break;
|
|
case 2:
|
|
bompDecodeLine(_deltaBufs[_curtable], src + 16, decoded_size);
|
|
if ((_deltaBufs[_curtable] - _deltaBuf) > 0) {
|
|
memset(_deltaBuf, 0, _deltaBufs[_curtable] - _deltaBuf);
|
|
}
|
|
tmp = (_deltaBuf + _deltaSize) - _deltaBufs[_curtable] - decoded_size;
|
|
if (tmp > 0) {
|
|
memset(_deltaBufs[_curtable] + decoded_size, 0, tmp);
|
|
}
|
|
break;
|
|
case 3:
|
|
if ((seq_nb & 1) || !(mask_flags & 1)) {
|
|
_curtable ^= 1;
|
|
}
|
|
|
|
if ((mask_flags & 4) != 0) {
|
|
proc3WithFDFE(_deltaBufs[_curtable], src + 16,
|
|
_deltaBufs[_curtable ^ 1] - _deltaBufs[_curtable], bw, bh,
|
|
pitch, _offsetTable);
|
|
} else {
|
|
proc3WithoutFDFE(_deltaBufs[_curtable], src + 16,
|
|
_deltaBufs[_curtable ^ 1] - _deltaBufs[_curtable], bw, bh,
|
|
pitch, _offsetTable);
|
|
}
|
|
break;
|
|
case 4:
|
|
if ((seq_nb & 1) || !(mask_flags & 1)) {
|
|
_curtable ^= 1;
|
|
}
|
|
|
|
if ((mask_flags & 4) != 0) {
|
|
proc4WithFDFE(_deltaBufs[_curtable], src + 16,
|
|
_deltaBufs[_curtable ^ 1] - _deltaBufs[_curtable], bw, bh,
|
|
pitch, _offsetTable);
|
|
} else {
|
|
proc4WithoutFDFE(_deltaBufs[_curtable], src + 16,
|
|
_deltaBufs[_curtable ^ 1] - _deltaBufs[_curtable], bw, bh,
|
|
pitch, _offsetTable);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
_prevSeqNb = seq_nb;
|
|
|
|
memcpy(dst, _deltaBufs[_curtable], _frameSize);
|
|
}
|
|
|
|
} // End of namespace Scumm
|
|
|