scummvm/engines/kyra/wsamovie.cpp
2009-06-29 16:08:00 +00:00

470 lines
12 KiB
C++

/* 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.
*
* $URL$
* $Id$
*
*/
#include "common/endian.h"
#include "common/system.h"
#include "kyra/kyra_v1.h"
#include "kyra/kyra_v2.h"
#include "kyra/screen.h"
#include "kyra/screen_v2.h"
#include "kyra/wsamovie.h"
#include "kyra/resource.h"
namespace Kyra {
WSAMovie_v1::WSAMovie_v1(KyraEngine_v1 *vm) : Movie(vm) {}
WSAMovie_v1::~WSAMovie_v1() { close(); }
int WSAMovie_v1::open(const char *filename, int offscreenDecode, Palette *palBuf) {
close();
uint32 flags = 0;
uint32 fileSize;
uint8 *p = _vm->resource()->fileData(filename, &fileSize);
if (!p)
return 0;
const uint8 *wsaData = p;
_numFrames = READ_LE_UINT16(wsaData); wsaData += 2;
_width = READ_LE_UINT16(wsaData); wsaData += 2;
_height = READ_LE_UINT16(wsaData); wsaData += 2;
_deltaBufferSize = READ_LE_UINT16(wsaData); wsaData += 2;
_offscreenBuffer = NULL;
_flags = 0;
if (_vm->gameFlags().useAltShapeHeader) {
flags = READ_LE_UINT16(wsaData);
wsaData += 2;
}
uint32 offsPal = 0;
if (flags & 1) {
offsPal = 0x300;
_flags |= WF_HAS_PALETTE;
if (palBuf)
_screen->loadPalette(wsaData + 8 + ((_numFrames << 2) & 0xFFFF), *palBuf, 0x300);
}
if (offscreenDecode) {
_flags |= WF_OFFSCREEN_DECODE;
const int offscreenBufferSize = _width * _height;
_offscreenBuffer = new uint8[offscreenBufferSize];
memset(_offscreenBuffer, 0, offscreenBufferSize);
}
if (_numFrames & 0x8000) {
// This is used in the Amiga version, the wsa playing code
// doesn't include any handling of it though, so we disable
// this warning for now.
//warning("Unhandled wsa flags 0x80");
_flags |= 0x80;
_numFrames &= 0x7FFF;
}
_currentFrame = _numFrames;
_deltaBuffer = new uint8[_deltaBufferSize];
memset(_deltaBuffer, 0, _deltaBufferSize);
// read frame offsets
_frameOffsTable = new uint32[_numFrames + 2];
_frameOffsTable[0] = 0;
uint32 frameDataOffs = READ_LE_UINT32(wsaData); wsaData += 4;
bool firstFrame = true;
if (frameDataOffs == 0) {
firstFrame = false;
frameDataOffs = READ_LE_UINT32(wsaData);
_flags |= WF_NO_FIRST_FRAME;
}
for (int i = 1; i < _numFrames + 2; ++i) {
_frameOffsTable[i] = READ_LE_UINT32(wsaData);
if (_frameOffsTable[i])
_frameOffsTable[i] -= frameDataOffs;
wsaData += 4;
}
if (!_frameOffsTable[_numFrames + 1])
_flags |= WF_NO_LAST_FRAME;
// skip palette
wsaData += offsPal;
// read frame data
const int frameDataSize = p + fileSize - wsaData;
_frameData = new uint8[frameDataSize];
memcpy(_frameData, wsaData, frameDataSize);
// decode first frame
if (firstFrame)
Screen::decodeFrame4(_frameData, _deltaBuffer, _deltaBufferSize);
delete[] p;
_opened = true;
return _numFrames;
}
void WSAMovie_v1::close() {
if (_opened) {
delete[] _deltaBuffer;
delete[] _offscreenBuffer;
delete[] _frameOffsTable;
delete[] _frameData;
_opened = false;
}
}
void WSAMovie_v1::displayFrame(int frameNum, int pageNum, int x, int y, uint16 flags, const uint8 *table1, const uint8 *table2) {
if (frameNum >= _numFrames || frameNum < 0 || !_opened)
return;
_x = x;
_y = y;
_drawPage = pageNum;
uint8 *dst = 0;
if (_flags & WF_OFFSCREEN_DECODE)
dst = _offscreenBuffer;
else
dst = _screen->getPageRect(_drawPage, _x, _y, _width, _height);
if (_currentFrame == _numFrames) {
if (!(_flags & WF_NO_FIRST_FRAME)) {
if (_flags & WF_OFFSCREEN_DECODE)
Screen::decodeFrameDelta(dst, _deltaBuffer);
else
Screen::decodeFrameDeltaPage(dst, _deltaBuffer, _width, (_flags & WF_XOR) == 0);
}
_currentFrame = 0;
}
// try to reduce the number of needed frame operations
int diffCount = ABS(_currentFrame - frameNum);
int frameStep = 1;
int frameCount;
if (_currentFrame < frameNum) {
frameCount = _numFrames - frameNum + _currentFrame;
if (diffCount > frameCount && !(_flags & WF_NO_LAST_FRAME))
frameStep = -1;
else
frameCount = diffCount;
} else {
frameCount = _numFrames - _currentFrame + frameNum;
if (frameCount >= diffCount || (_flags & WF_NO_LAST_FRAME)) {
frameStep = -1;
frameCount = diffCount;
}
}
// process
if (frameStep > 0) {
uint16 cf = _currentFrame;
while (frameCount--) {
cf += frameStep;
processFrame(cf, dst);
if (cf == _numFrames)
cf = 0;
}
} else {
uint16 cf = _currentFrame;
while (frameCount--) {
if (cf == 0)
cf = _numFrames;
processFrame(cf, dst);
cf += frameStep;
}
}
// display
_currentFrame = frameNum;
if (_flags & WF_OFFSCREEN_DECODE) {
int pageBackUp = _screen->setCurPage(_drawPage);
int plotFunc = (flags & 0xFF00) >> 12;
int unk1 = flags & 0xFF;
_screen->copyWsaRect(_x, _y, _width, _height, 0, plotFunc, _offscreenBuffer, unk1, table1, table2);
_screen->_curPage = pageBackUp;
}
}
void WSAMovie_v1::processFrame(int frameNum, uint8 *dst) {
if (!_opened)
return;
assert(frameNum <= _numFrames);
const uint8 *src = _frameData + _frameOffsTable[frameNum];
Screen::decodeFrame4(src, _deltaBuffer, _deltaBufferSize);
if (_flags & WF_OFFSCREEN_DECODE)
Screen::decodeFrameDelta(dst, _deltaBuffer);
else
Screen::decodeFrameDeltaPage(dst, _deltaBuffer, _width, false);
}
#pragma mark -
WSAMovieAmiga::WSAMovieAmiga(KyraEngine_v1 *vm) : WSAMovie_v1(vm), _buffer(0) {}
int WSAMovieAmiga::open(const char *filename, int offscreenDecode, Palette *palBuf) {
int res = WSAMovie_v1::open(filename, offscreenDecode, palBuf);
if (!res)
return 0;
_buffer = new uint8[_width * _height];
assert(_buffer);
return res;
}
void WSAMovieAmiga::close() {
if (_opened) {
delete[] _buffer;
_buffer = 0;
}
WSAMovie_v1::close();
}
void WSAMovieAmiga::displayFrame(int frameNum, int pageNum, int x, int y, uint16 flags, const uint8 *table1, const uint8 *table2) {
if (frameNum >= _numFrames || frameNum < 0 || !_opened)
return;
_x = x;
_y = y;
_drawPage = pageNum;
uint8 *dst;
dst = _buffer;
memset(_buffer, 0, _width*_height);
if (_currentFrame == _numFrames) {
if (!(_flags & WF_NO_FIRST_FRAME)) {
Screen::decodeFrameDelta(dst, _deltaBuffer, true);
Screen::convertAmigaGfx(dst, _width, _height);
if (_flags & WF_OFFSCREEN_DECODE) {
dst = _offscreenBuffer;
const uint8 *src = _buffer;
int size = _width * _height;
for (int i = 0; i < size; ++i)
*dst++ ^= *src++;
dst = _buffer;
} else {
_screen->copyBlockToPage(_drawPage, _x, _y, _width, _height, _buffer);
}
}
_currentFrame = 0;
}
// try to reduce the number of needed frame operations
int diffCount = ABS(_currentFrame - frameNum);
int frameStep = 1;
int frameCount;
if (_currentFrame < frameNum) {
frameCount = _numFrames - frameNum + _currentFrame;
if (diffCount > frameCount && !(_flags & WF_NO_LAST_FRAME))
frameStep = -1;
else
frameCount = diffCount;
} else {
frameCount = _numFrames - _currentFrame + frameNum;
if (frameCount >= diffCount || (_flags & WF_NO_LAST_FRAME)) {
frameStep = -1;
frameCount = diffCount;
}
}
// process
if (frameStep > 0) {
uint16 cf = _currentFrame;
while (frameCount--) {
cf += frameStep;
processFrame(cf, dst);
if (cf == _numFrames)
cf = 0;
}
} else {
uint16 cf = _currentFrame;
while (frameCount--) {
if (cf == 0)
cf = _numFrames;
processFrame(cf, dst);
cf += frameStep;
}
}
// display
_currentFrame = frameNum;
if (_flags & WF_OFFSCREEN_DECODE) {
int pageBackUp = _screen->setCurPage(_drawPage);
int plotFunc = (flags & 0xFF00) >> 12;
int unk1 = flags & 0xFF;
_screen->copyWsaRect(_x, _y, _width, _height, 0, plotFunc, _offscreenBuffer, unk1, table1, table2);
_screen->_curPage = pageBackUp;
}
}
void WSAMovieAmiga::processFrame(int frameNum, uint8 *dst) {
if (!_opened)
return;
assert(frameNum <= _numFrames);
memset(dst, 0, _width*_height);
const uint8 *src = _frameData + _frameOffsTable[frameNum];
Screen::decodeFrame4(src, _deltaBuffer, _deltaBufferSize);
Screen::decodeFrameDelta(dst, _deltaBuffer, true);
Screen::convertAmigaGfx(dst, _width, _height);
src = dst;
dst = 0;
int dstPitch = 0;
if (_flags & WF_OFFSCREEN_DECODE) {
dst = _offscreenBuffer;
dstPitch = _width;
} else {
dst = _screen->getPageRect(_drawPage, _x, _y, _width, _height);
dstPitch = Screen::SCREEN_W;
}
for (int y = 0; y < _height; ++y) {
for (int x = 0; x < _width; ++x)
*dst++ ^= *src++;
dst += dstPitch - _width;
}
}
#pragma mark -
WSAMovie_v2::WSAMovie_v2(KyraEngine_v1 *vm) : WSAMovie_v1(vm), _xAdd(0), _yAdd(0) {}
int WSAMovie_v2::open(const char *filename, int unk1, Palette *palBuf) {
close();
uint32 flags = 0;
uint32 fileSize;
uint8 *p = _vm->resource()->fileData(filename, &fileSize);
if (!p) {
warning("couldn't load wsa file: '%s'", filename);
return 0;
}
const uint8 *wsaData = p;
_numFrames = READ_LE_UINT16(wsaData); wsaData += 2;
_xAdd = (int16)(READ_LE_UINT16(wsaData)); wsaData += 2;
_yAdd = (int16)(READ_LE_UINT16(wsaData)); wsaData += 2;
_width = READ_LE_UINT16(wsaData); wsaData += 2;
_height = READ_LE_UINT16(wsaData); wsaData += 2;
_deltaBufferSize = READ_LE_UINT16(wsaData); wsaData += 2;
_offscreenBuffer = NULL;
_flags = 0;
flags = READ_LE_UINT16(wsaData); wsaData += 2;
uint32 offsPal = 0;
if (flags & 1) {
offsPal = 0x300;
_flags |= WF_HAS_PALETTE;
if (palBuf)
_screen->loadPalette(wsaData + 8 + ((_numFrames << 2) & 0xFFFF), *palBuf, 0x300);
}
if (flags & 2) {
if (_vm->gameFlags().use16ColorMode) {
offsPal = 0x30;
_flags |= WF_HAS_PALETTE;
if (palBuf)
_screen->loadPalette(wsaData + 8 + ((_numFrames << 2) & 0xFFFF), *palBuf, 0x30);
}
_flags |= WF_XOR;
}
if (!(unk1 & 2)) {
_flags |= WF_OFFSCREEN_DECODE;
const int offscreenBufferSize = _width * _height;
_offscreenBuffer = new uint8[offscreenBufferSize];
memset(_offscreenBuffer, 0, offscreenBufferSize);
}
if (_numFrames & 0x8000) {
warning("Unhandled wsa flags 0x80");
_flags |= 0x80;
_numFrames &= 0x7FFF;
}
_currentFrame = _numFrames;
_deltaBuffer = new uint8[_deltaBufferSize];
memset(_deltaBuffer, 0, _deltaBufferSize);
// read frame offsets
_frameOffsTable = new uint32[_numFrames + 2];
_frameOffsTable[0] = 0;
uint32 frameDataOffs = READ_LE_UINT32(wsaData); wsaData += 4;
bool firstFrame = true;
if (frameDataOffs == 0) {
firstFrame = false;
frameDataOffs = READ_LE_UINT32(wsaData);
_flags |= WF_NO_FIRST_FRAME;
}
for (int i = 1; i < _numFrames + 2; ++i) {
_frameOffsTable[i] = READ_LE_UINT32(wsaData);
if (_frameOffsTable[i])
_frameOffsTable[i] -= frameDataOffs;
wsaData += 4;
}
if (!_frameOffsTable[_numFrames + 1])
_flags |= WF_NO_LAST_FRAME;
// skip palette
wsaData += offsPal;
// read frame data
const int frameDataSize = p + fileSize - wsaData;
_frameData = new uint8[frameDataSize];
memcpy(_frameData, wsaData, frameDataSize);
// decode first frame
if (firstFrame)
Screen::decodeFrame4(_frameData, _deltaBuffer, _deltaBufferSize);
delete[] p;
_opened = true;
return _numFrames;
}
} // end of namespace Kyra