raze-gles/polymer/eduke32/source/jmact/animlib.c

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