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372 lines
10 KiB
C
372 lines
10 KiB
C
//-------------------------------------------------------------------------
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/*
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Copyright (C) 1996, 2003 - 3D Realms Entertainment
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This file is part of Duke Nukem 3D version 1.5 - Atomic Edition
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Duke Nukem 3D 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.
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See the 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Original Source: 1996 - Todd Replogle
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Prepared for public release: 03/21/2003 - Charlie Wiederhold, 3D Realms
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Modifications for JonoF's port by Jonathon Fowler (jonof@edgenetwk.com)
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*/
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//-------------------------------------------------------------------------
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#include "compat.h"
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#include "util_lib.h"
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#include "animlib.h"
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//****************************************************************************
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//
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// GLOBALS
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//
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//****************************************************************************
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//****************************************************************************
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//
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// LOCALS
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//
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//****************************************************************************
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static anim_t * anim=NULL;
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static int32_t Anim_Started = FALSE;
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//****************************************************************************
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//
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// CheckAnimStarted ()
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//
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//****************************************************************************
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static void CheckAnimStarted(char * funcname)
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{
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if (!Anim_Started)
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Error("ANIMLIB_%s: Anim has not been initialized\n",funcname);
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}
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//****************************************************************************
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//
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// findpage ()
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// - given a frame number return the large page number it resides in
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//
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//****************************************************************************
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uint16_t findpage(uint16_t framenumber)
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{
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uint16_t i;
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CheckAnimStarted("findpage");
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for (i=0; i<anim->lpheader.nLps; i++)
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{
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if
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(
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anim->LpArray[i].baseRecord <= framenumber &&
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anim->LpArray[i].baseRecord + anim->LpArray[i].nRecords > framenumber
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)
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return(i);
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}
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return(i);
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}
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//****************************************************************************
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//
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// loadpage ()
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// - seek out and load in the large page specified
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//
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//****************************************************************************
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void loadpage(uint16_t pagenumber, uint16_t *pagepointer)
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{
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int32_t size;
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uint8_t * buffer;
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CheckAnimStarted("loadpage");
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buffer = anim->buffer;
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if (anim->curlpnum != pagenumber)
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{
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anim->curlpnum = pagenumber;
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buffer += 0xb00 + (pagenumber*0x10000);
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size = sizeof(lp_descriptor);
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/*
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Bmemcpy(&anim->curlp,buffer,size);
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// JBF: why didn't this get read from the LpArray[] table?
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anim->curlp.baseRecord = B_LITTLE16(anim->curlp.baseRecord);
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anim->curlp.nRecords = B_LITTLE16(anim->curlp.nRecords);
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anim->curlp.nBytes = B_LITTLE16(anim->curlp.nBytes);
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*/
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Bmemcpy(&anim->curlp, &anim->LpArray[pagenumber], size);
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buffer += size + sizeof(uint16_t);
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Bmemcpy(pagepointer,buffer,anim->curlp.nBytes+(anim->curlp.nRecords*2));
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}
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}
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//****************************************************************************
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//
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// CPlayRunSkipDump ()
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// - This version of the decompressor is here for portability to non PC's
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//
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//****************************************************************************
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void CPlayRunSkipDump(uint8_t *srcP, uint8_t *dstP)
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{
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int8_t cnt;
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uint16_t wordCnt;
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uint8_t pixel;
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nextOp:
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cnt = (int8_t) *srcP++;
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if (cnt > 0)
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goto dump;
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if (cnt == 0)
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goto run;
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cnt -= 0x80;
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if (cnt == 0)
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goto longOp;
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/* shortSkip */
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dstP += cnt; /* adding 7-bit count to 32-bit pointer */
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goto nextOp;
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dump:
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do
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{
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*dstP++ = *srcP++;
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}
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while (--cnt);
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goto nextOp;
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run:
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wordCnt = (uint8_t)*srcP++; /* 8-bit unsigned count */
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pixel = *srcP++;
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do
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{
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*dstP++ = pixel;
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}
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while (--wordCnt);
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goto nextOp;
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longOp:
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wordCnt = B_LITTLE16(*((uint16_t *)srcP));
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srcP += sizeof(uint16_t);
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if ((int16_t)wordCnt <= 0)
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goto notLongSkip; /* Do SIGNED test. */
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/* longSkip. */
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dstP += wordCnt;
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goto nextOp;
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notLongSkip:
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if (wordCnt == 0)
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goto stop;
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wordCnt -= 0x8000; /* Remove sign bit. */
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if (wordCnt >= 0x4000)
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goto longRun;
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/* longDump. */
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do
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{
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*dstP++ = *srcP++;
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}
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while (--wordCnt);
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goto nextOp;
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longRun:
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wordCnt -= 0x4000; /* Clear "longRun" bit. */
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pixel = *srcP++;
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do
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{
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*dstP++ = pixel;
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}
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while (--wordCnt);
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goto nextOp;
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stop: /* all done */
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;
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}
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//****************************************************************************
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//
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// renderframe ()
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// - draw the frame sepcified from the large page in the buffer pointed to
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//
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//****************************************************************************
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void renderframe(uint16_t framenumber, uint16_t *pagepointer)
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{
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uint16_t offset=0;
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uint16_t i;
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uint16_t destframe;
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uint8_t *ppointer;
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CheckAnimStarted("renderframe");
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destframe = framenumber - anim->curlp.baseRecord;
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for (i = 0; i < destframe; i++)
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{
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offset += B_LITTLE16(pagepointer[i]);
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}
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ppointer = (uint8_t *)pagepointer;
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ppointer+=anim->curlp.nRecords*2+offset;
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if (ppointer[1])
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{
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ppointer += (4 + B_LITTLE16(((uint16_t *)ppointer)[1]) + (B_LITTLE16(((uint16_t *)ppointer)[1]) & 1));
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}
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else
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{
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ppointer+=4;
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}
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CPlayRunSkipDump((uint8_t *)ppointer, (uint8_t *)anim->imagebuffer);
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}
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//****************************************************************************
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//
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// drawframe ()
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// - high level frame draw routine
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//
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//****************************************************************************
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void drawframe(uint16_t framenumber)
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{
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CheckAnimStarted("drawframe");
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loadpage(findpage(framenumber), anim->thepage);
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renderframe(framenumber, anim->thepage);
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}
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//****************************************************************************
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//
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// ANIM_LoadAnim ()
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//
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//****************************************************************************
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void ANIM_LoadAnim(char * buffer)
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{
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uint16_t i;
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int32_t size;
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if (!Anim_Started)
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{
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anim = Bmalloc(sizeof(anim_t));
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Anim_Started = TRUE;
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}
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anim->buffer = (uint8_t *)buffer;
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anim->curlpnum = 0xffff;
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anim->currentframe = -1;
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size = sizeof(lpfileheader);
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Bmemcpy(&anim->lpheader, buffer, size);
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anim->lpheader.id = B_LITTLE32(anim->lpheader.id);
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anim->lpheader.maxLps = B_LITTLE16(anim->lpheader.maxLps);
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anim->lpheader.nLps = B_LITTLE16(anim->lpheader.nLps);
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anim->lpheader.nRecords = B_LITTLE32(anim->lpheader.nRecords);
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anim->lpheader.maxRecsPerLp = B_LITTLE16(anim->lpheader.maxRecsPerLp);
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anim->lpheader.lpfTableOffset = B_LITTLE16(anim->lpheader.lpfTableOffset);
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anim->lpheader.contentType = B_LITTLE32(anim->lpheader.contentType);
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anim->lpheader.width = B_LITTLE16(anim->lpheader.width);
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anim->lpheader.height = B_LITTLE16(anim->lpheader.height);
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anim->lpheader.nFrames = B_LITTLE32(anim->lpheader.nFrames);
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anim->lpheader.framesPerSecond = B_LITTLE16(anim->lpheader.framesPerSecond);
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buffer += size+128;
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// load the color palette
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for (i = 0; i < 768; i += 3)
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{
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anim->pal[i+2] = *buffer++;
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anim->pal[i+1] = *buffer++;
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anim->pal[i] = *buffer++;
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buffer++;
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}
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// read in large page descriptors
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size = sizeof(anim->LpArray);
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Bmemcpy(&anim->LpArray,buffer,size);
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for (i = 0; i < size/sizeof(lp_descriptor); i++)
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{
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anim->LpArray[i].baseRecord = B_LITTLE16(anim->LpArray[i].baseRecord);
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anim->LpArray[i].nRecords = B_LITTLE16(anim->LpArray[i].nRecords);
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anim->LpArray[i].nBytes = B_LITTLE16(anim->LpArray[i].nBytes);
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}
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}
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//****************************************************************************
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//
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// ANIM_FreeAnim ()
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//
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//****************************************************************************
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void ANIM_FreeAnim(void)
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{
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if (Anim_Started)
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{
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Bfree(anim);
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Anim_Started = FALSE;
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}
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}
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//****************************************************************************
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//
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// ANIM_NumFrames ()
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//
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//****************************************************************************
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int32_t ANIM_NumFrames(void)
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{
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CheckAnimStarted("NumFrames");
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return anim->lpheader.nRecords;
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}
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//****************************************************************************
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//
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// ANIM_DrawFrame ()
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//
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//****************************************************************************
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uint8_t * ANIM_DrawFrame(int32_t framenumber)
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{
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int32_t cnt;
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CheckAnimStarted("DrawFrame");
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if ((anim->currentframe != -1) && (anim->currentframe<=framenumber))
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{
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for (cnt = anim->currentframe; cnt < framenumber; cnt++)
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drawframe(cnt);
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}
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else
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{
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for (cnt = 0; cnt < framenumber; cnt++)
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drawframe(cnt);
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}
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anim->currentframe = framenumber;
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return anim->imagebuffer;
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}
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//****************************************************************************
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//
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// ANIM_GetPalette ()
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//
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//****************************************************************************
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uint8_t * ANIM_GetPalette(void)
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{
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CheckAnimStarted("GetPalette");
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return anim->pal;
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}
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