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