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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.
*
* $URL$
* $Id$
*
*/
#include "common/endian.h"
#include "gob/gob.h"
#include "gob/video.h"
namespace Gob {
Video_v1::Video_v1(GobEngine *vm) : Video(vm) {
}
char Video_v1::spriteUncompressor(byte *sprBuf, int16 srcWidth, int16 srcHeight,
int16 x, int16 y, int16 transp, SurfaceDesc *destDesc) {
byte *memBuffer;
byte *srcPtr, *destPtr, *linePtr;
byte temp;
uint16 sourceLeft;
uint16 cmdVar;
int16 curWidth, curHeight;
int16 offset;
int16 counter2;
int16 bufPos;
int16 strLen;
if (!destDesc)
return 1;
_vm->validateVideoMode(destDesc->_vidMode);
if (sprBuf[0] != 1)
return 0;
if (sprBuf[1] != 2)
return 0;
if (sprBuf[2] == 2) {
SurfaceDesc sourceDesc(0x13, srcWidth, srcHeight, sprBuf + 3);
Video::drawSprite(&sourceDesc, destDesc, 0, 0, srcWidth - 1,
srcHeight - 1, x, y, transp);
return 1;
} else {
memBuffer = new byte[4114];
assert(memBuffer);
srcPtr = sprBuf + 3;
sourceLeft = READ_LE_UINT16(srcPtr);
destPtr = destDesc->getVidMem() + destDesc->getWidth() * y + x;
curWidth = 0;
curHeight = 0;
linePtr = destPtr;
srcPtr += 4;
for (offset = 0; offset < 4078; offset++)
memBuffer[offset] = 0x20;
cmdVar = 0;
bufPos = 4078;
while (1) {
cmdVar >>= 1;
if ((cmdVar & 0x100) == 0) {
cmdVar = *srcPtr | 0xFF00;
srcPtr++;
}
if ((cmdVar & 1) != 0) {
temp = *srcPtr++;
if ((temp != 0) || (transp == 0))
*destPtr = temp;
destPtr++;
curWidth++;
if (curWidth >= srcWidth) {
curWidth = 0;
linePtr += destDesc->getWidth();
destPtr = linePtr;
curHeight++;
if (curHeight >= srcHeight)
break;
}
sourceLeft--;
if (sourceLeft == 0)
break;
memBuffer[bufPos] = temp;
bufPos++;
bufPos %= 4096;
} else {
offset = *srcPtr;
srcPtr++;
offset |= (*srcPtr & 0xF0) << 4;
strLen = (*srcPtr & 0x0F) + 3;
srcPtr++;
for (counter2 = 0; counter2 < strLen; counter2++) {
temp = memBuffer[(offset + counter2) % 4096];
if ((temp != 0) || (transp == 0))
*destPtr = temp;
destPtr++;
curWidth++;
if (curWidth >= srcWidth) {
curWidth = 0;
linePtr += destDesc->getWidth();
destPtr = linePtr;
curHeight++;
if (curHeight >= srcHeight) {
delete[] memBuffer;
return 1;
}
}
sourceLeft--;
if (sourceLeft == 0) {
delete[] memBuffer;
return 1;
}
memBuffer[bufPos] = temp;
bufPos++;
bufPos %= 4096;
}
}
}
}
delete[] memBuffer;
return 1;
}
} // End of namespace Gob
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