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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004-2005 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "common/stdafx.h"
#include "kyra/kyra.h"
#include "kyra/screen.h"
#include "kyra/wsamovie.h"
namespace Kyra {
WSAMovieV1 *KyraEngine::wsa_open(const char *filename, int offscreenDecode, uint8 *palBuf) {
debug(9, "KyraEngine::wsa_open('%s', %d, 0x%X)", filename, offscreenDecode, palBuf);
uint32 flags = 0;
uint32 fileSize;
uint8 *p = _res->fileData(filename, &fileSize);
WSAMovieV1 *wsa = new WSAMovieV1;
const uint8 *wsaData = p;
wsa->numFrames = READ_LE_UINT16(wsaData); wsaData += 2;
wsa->width = READ_LE_UINT16(wsaData); wsaData += 2;
wsa->height = READ_LE_UINT16(wsaData); wsaData += 2;
wsa->deltaBufferSize = READ_LE_UINT16(wsaData); wsaData += 2;
wsa->offscreenBuffer = NULL;
wsa->flags = 0;
if (_game == KYRA1CD) {
flags = READ_LE_UINT16(wsaData); wsaData += 2;
}
uint32 offsPal = 0;
if (flags & 1) {
offsPal = 0x300;
wsa->flags |= WF_HAS_PALETTE;
if (palBuf) {
memcpy(palBuf, wsaData + (wsa->numFrames + 2) * 4, 0x300);
}
}
if (offscreenDecode) {
wsa->flags |= WF_OFFSCREEN_DECODE;
const int offscreenBufferSize = wsa->width * wsa->height;
wsa->offscreenBuffer = (uint8 *)malloc(offscreenBufferSize);
memset(wsa->offscreenBuffer, 0, offscreenBufferSize);
}
if (wsa->numFrames & 0x8000) {
warning("Unhandled wsa flags 0x80");
wsa->flags |= 0x80;
wsa->numFrames &= 0x7FFF;
}
wsa->currentFrame = wsa->numFrames;
wsa->deltaBuffer = (uint8 *)malloc(wsa->deltaBufferSize);
memset(wsa->deltaBuffer, 0, wsa->deltaBufferSize);
// read frame offsets
wsa->frameOffsTable = (uint32 *)malloc((wsa->numFrames + 2) * 4);
wsa->frameOffsTable[0] = 0;
uint32 frameDataOffs = READ_LE_UINT32(wsaData); wsaData += 4;
bool firstFrame = true;
if (frameDataOffs == 0) {
firstFrame = false;
frameDataOffs = READ_LE_UINT32(wsaData);
wsa->flags |= WF_NO_FIRST_FRAME;
}
for (int i = 1; i < wsa->numFrames + 2; ++i) {
wsa->frameOffsTable[i] = READ_LE_UINT32(wsaData) - frameDataOffs;
wsaData += 4;
}
// skip palette
wsaData += offsPal;
// read frame data
const int frameDataSize = p + fileSize - wsaData;
wsa->frameData = (uint8 *)malloc(frameDataSize);
memcpy(wsa->frameData, wsaData, frameDataSize);
// decode first frame
if (firstFrame) {
Screen::decodeFrame4(wsa->frameData, wsa->deltaBuffer, wsa->deltaBufferSize);
}
delete[] p;
return wsa;
}
void KyraEngine::wsa_close(WSAMovieV1 *wsa) {
debug(9, "KyraEngine::wsa_close(0x%X)", wsa);
if (wsa) {
free(wsa->deltaBuffer);
free(wsa->offscreenBuffer);
free(wsa->frameOffsTable);
delete wsa;
}
}
uint16 KyraEngine::wsa_getNumFrames(WSAMovieV1 *wsa) const {
debug(9, "KyraEngine::wsa_getNumFrames(0x%X)", wsa);
uint16 n = 0;
if (wsa) {
n = wsa->numFrames;
}
return n;
}
void KyraEngine::wsa_play(WSAMovieV1 *wsa, int frameNum, int x, int y, int pageNum) {
debug(9, "KyraEngine::wsa_play(0x%X, %d, %d, %d, %d)", wsa, frameNum, x, y, pageNum);
assert(frameNum <= wsa->numFrames);
uint8 *dst;
if (wsa->flags & WF_OFFSCREEN_DECODE) {
dst = wsa->offscreenBuffer;
} else {
dst = _screen->getPagePtr(pageNum) + y * Screen::SCREEN_W + x;
}
if (wsa->currentFrame == wsa->numFrames) {
if (!(wsa->flags & WF_NO_FIRST_FRAME)) {
if (wsa->flags & WF_OFFSCREEN_DECODE) {
Screen::decodeFrameDelta(dst, wsa->deltaBuffer);
} else {
Screen::decodeFrameDeltaPage(dst, wsa->deltaBuffer, wsa->width);
}
}
wsa->currentFrame = 0;
}
// try to reduce the number of needed frame operations
int diffCount = ABS(wsa->currentFrame - frameNum);
int frameStep = 1;
int frameCount;
if (wsa->currentFrame < frameNum) {
frameCount = wsa->numFrames - frameNum + wsa->currentFrame;
if (diffCount > frameCount) {
frameStep = -1;
} else {
frameCount = diffCount;
}
} else {
frameCount = wsa->numFrames - wsa->currentFrame + frameNum;
if (frameCount >= diffCount) {
frameStep = -1;
frameCount = diffCount;
}
}
// process
if (frameStep > 0) {
uint16 cf = wsa->currentFrame;
while (frameCount--) {
cf += frameStep;
wsa_processFrame(wsa, cf, dst);
if (cf == wsa->numFrames) {
cf = 0;
}
}
} else {
uint16 cf = wsa->currentFrame;
while (frameCount--) {
if (cf == 0) {
cf = wsa->numFrames;
}
wsa_processFrame(wsa, cf, dst);
cf += frameStep;
}
}
// display
wsa->currentFrame = frameNum;
if (wsa->flags & WF_OFFSCREEN_DECODE) {
_screen->copyBlockToPage(pageNum, x, y, wsa->width, wsa->height, wsa->offscreenBuffer);
}
}
void KyraEngine::wsa_processFrame(WSAMovieV1 *wsa, int frameNum, uint8 *dst) {
debug(9, "KyraEngine::wsa_processFrame(0x%X, %d, 0x%X)", wsa, frameNum, dst);
assert(frameNum <= wsa->numFrames);
const uint8 *src = wsa->frameData + wsa->frameOffsTable[frameNum];
Screen::decodeFrame4(src, wsa->deltaBuffer, wsa->deltaBufferSize);
if (wsa->flags & WF_OFFSCREEN_DECODE) {
Screen::decodeFrameDelta(dst, wsa->deltaBuffer);
} else {
Screen::decodeFrameDeltaPage(dst, wsa->deltaBuffer, wsa->width);
}
}
} // end of namespace Kyra
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