mirror of
https://github.com/ZDoom/Raze.git
synced 2024-11-29 15:32:24 +00:00
290 lines
8.1 KiB
C++
290 lines
8.1 KiB
C++
//-------------------------------------------------------------------------
|
|
/*
|
|
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 (jf@jonof.id.au)
|
|
*/
|
|
//-------------------------------------------------------------------------
|
|
|
|
#include <string.h>
|
|
#include "animlib.h"
|
|
#include "m_swap.h"
|
|
|
|
//****************************************************************************
|
|
//
|
|
// LOCALS
|
|
//
|
|
//****************************************************************************
|
|
|
|
//****************************************************************************
|
|
//
|
|
// findpage ()
|
|
// - return the large page number a given frame resides in
|
|
//
|
|
//****************************************************************************
|
|
|
|
static inline uint16_t findpage(anim_t *anim, uint16_t framenumber)
|
|
{
|
|
// curlpnum is initialized to 0xffff, obviously
|
|
size_t i = anim->curlpnum & ~0xffff;
|
|
size_t const nLps = anim->lpheader->nLps;
|
|
bool j = true;
|
|
|
|
if (framenumber < anim->currentframe)
|
|
i = 0, j = false;
|
|
|
|
// this scans the last used page and higher first and then scans the
|
|
// previously accessed pages afterwards if it doesn't find anything
|
|
do
|
|
{
|
|
for (; i < nLps; ++i)
|
|
{
|
|
lp_descriptor & lp = anim->LpArray[i];
|
|
if (lp.baseRecord <= framenumber && framenumber < lp.baseRecord + lp.nRecords)
|
|
return (uint16_t)i;
|
|
}
|
|
|
|
if (j && i == nLps)
|
|
{
|
|
// handle out of order pages... I don't think any Duke .ANM files
|
|
// have them, but they're part of the file spec
|
|
i = 0, j = false;
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
while (1);
|
|
|
|
return (uint16_t)i;
|
|
}
|
|
|
|
|
|
//****************************************************************************
|
|
//
|
|
// loadpage ()
|
|
// - seek out and set pointers to the large page specified
|
|
//
|
|
//****************************************************************************
|
|
|
|
static inline void loadpage(anim_t *anim, uint16_t pagenumber, uint16_t **pagepointer)
|
|
{
|
|
if (anim->curlpnum == pagenumber)
|
|
return;
|
|
|
|
anim->curlpnum = pagenumber;
|
|
anim->curlp = &anim->LpArray[pagenumber];
|
|
*pagepointer = (uint16_t *)(anim->buffer + 0xb00 + (pagenumber*IMAGEBUFFERSIZE) +
|
|
sizeof(lp_descriptor) + sizeof(uint16_t));
|
|
}
|
|
|
|
|
|
//****************************************************************************
|
|
//
|
|
// decodeframe ()
|
|
// - I found this less obfuscated version of the .ANM "decompressor",
|
|
// (c) 1998 "Jari Komppa aka Sol/Trauma". This code is public domain
|
|
// but has been mostly rewritten by me.
|
|
//
|
|
// - As a side note, it looks like this format came about in 1989 and
|
|
// never went anywhere after that, and appears to have been the format
|
|
// used by Electronic Arts' DeluxePaint Animation, which never made it
|
|
// past version 1.0.
|
|
//
|
|
//****************************************************************************
|
|
|
|
static void decodeframe(uint8_t * srcP, uint8_t * dstP)
|
|
{
|
|
do
|
|
{
|
|
{
|
|
/* short op */
|
|
uint8_t count = *srcP++;
|
|
|
|
if (!count) /* short RLE */
|
|
{
|
|
uint8_t color = *(srcP+1);
|
|
count = *(uint8_t *)srcP;
|
|
srcP += sizeof(int16_t);
|
|
memset(dstP, color, count);
|
|
dstP += count;
|
|
continue;
|
|
}
|
|
else if ((count & 0x80) == 0) /* short copy */
|
|
{
|
|
memcpy(dstP, srcP, count);
|
|
dstP += count;
|
|
srcP += count;
|
|
continue;
|
|
}
|
|
else if ((count &= ~0x80) > 0) /* short skip */
|
|
{
|
|
dstP += count;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
{
|
|
/* long op */
|
|
uint16_t count = LittleShort((uint16_t)GetShort(srcP));
|
|
srcP += sizeof(int16_t);
|
|
|
|
if (!count) /* stop sign */
|
|
return;
|
|
else if ((count & 0x8000) == 0) /* long skip */
|
|
{
|
|
dstP += count;
|
|
continue;
|
|
}
|
|
else if ((count &= ~0x8000) & 0x4000) /* long RLE */
|
|
{
|
|
uint8_t color = *srcP++;
|
|
count &= ~0x4000;
|
|
memset(dstP, color, count);
|
|
dstP += count;
|
|
continue;
|
|
}
|
|
|
|
/* long copy */
|
|
memcpy(dstP, srcP, count);
|
|
dstP += count;
|
|
srcP += count;
|
|
}
|
|
}
|
|
while (1);
|
|
}
|
|
|
|
|
|
//****************************************************************************
|
|
//
|
|
// renderframe ()
|
|
// - draw the frame sepcified from the large page in the buffer pointed to
|
|
//
|
|
//****************************************************************************
|
|
|
|
static void renderframe(anim_t *anim, uint16_t framenumber, uint16_t *pagepointer)
|
|
{
|
|
uint16_t offset = 0;
|
|
uint16_t frame = framenumber - anim->curlp->baseRecord;
|
|
|
|
while (frame--) offset += LittleShort(pagepointer[frame]);
|
|
|
|
if (offset >= anim->curlp->nBytes)
|
|
return;
|
|
|
|
uint8_t *ppointer = (uint8_t *)(pagepointer) + anim->curlp->nRecords*2 + offset + 4;
|
|
|
|
if ((ppointer-4)[1])
|
|
{
|
|
uint16_t const temp = LittleShort(((uint16_t *)(ppointer-4))[1]);
|
|
ppointer += temp + (temp & 1);
|
|
}
|
|
|
|
decodeframe((uint8_t *)ppointer, (uint8_t *)anim->imagebuffer);
|
|
}
|
|
|
|
|
|
//****************************************************************************
|
|
//
|
|
// drawframe ()
|
|
// - high level frame draw routine
|
|
//
|
|
//****************************************************************************
|
|
|
|
static inline void drawframe(anim_t *anim, uint16_t framenumber)
|
|
{
|
|
loadpage(anim, findpage(anim, framenumber), &anim->thepage);
|
|
renderframe(anim, framenumber, anim->thepage);
|
|
}
|
|
|
|
// <length> is the file size, for consistency checking.
|
|
int32_t ANIM_LoadAnim(anim_t *anim, const uint8_t *buffer, size_t length)
|
|
{
|
|
if (memcmp(buffer, "LPF ", 4)) return -1;
|
|
|
|
length -= sizeof(lpfileheader)+128+768;
|
|
if (length < 0)
|
|
return -1;
|
|
|
|
anim->curlpnum = 0xffff;
|
|
anim->currentframe = -1;
|
|
|
|
// this just modifies the data in-place instead of copying it elsewhere now
|
|
lpfileheader & lpheader = *(anim->lpheader = (lpfileheader *)(anim->buffer = buffer));
|
|
|
|
lpheader.id = LittleLong(lpheader.id);
|
|
lpheader.maxLps = LittleShort(lpheader.maxLps);
|
|
lpheader.nLps = LittleShort(lpheader.nLps);
|
|
lpheader.nRecords = LittleLong(lpheader.nRecords);
|
|
lpheader.maxRecsPerLp = LittleShort(lpheader.maxRecsPerLp);
|
|
lpheader.lpfTableOffset = LittleShort(lpheader.lpfTableOffset);
|
|
lpheader.contentType = LittleLong(lpheader.contentType);
|
|
lpheader.width = LittleShort(lpheader.width);
|
|
lpheader.height = LittleShort(lpheader.height);
|
|
lpheader.nFrames = LittleLong(lpheader.nFrames);
|
|
lpheader.framesPerSecond = LittleShort(lpheader.framesPerSecond);
|
|
|
|
length -= lpheader.nLps * sizeof(lp_descriptor);
|
|
if (length < 0)
|
|
return -2;
|
|
|
|
buffer += sizeof(lpfileheader)+128;
|
|
|
|
// load the color palette
|
|
for (uint8_t * pal = anim->pal, * pal_end = pal+768; pal < pal_end; pal += 3, buffer += 4)
|
|
{
|
|
pal[2] = buffer[0];
|
|
pal[1] = buffer[1];
|
|
pal[0] = buffer[2];
|
|
}
|
|
|
|
// set up large page descriptors
|
|
anim->LpArray = (lp_descriptor *)buffer;
|
|
|
|
// theoretically we should be able to play files with more than 256 frames now
|
|
// assuming the utilities to create them can make them that way
|
|
for (lp_descriptor * lp = anim->LpArray, * lp_end = lp+lpheader.nLps; lp < lp_end; ++lp)
|
|
{
|
|
lp->baseRecord = LittleShort(lp->baseRecord);
|
|
lp->nRecords = LittleShort(lp->nRecords);
|
|
lp->nBytes = LittleShort(lp->nBytes);
|
|
}
|
|
return ANIM_NumFrames(anim) <= 0 ? -1 : 0;
|
|
}
|
|
|
|
|
|
uint8_t * ANIM_DrawFrame(anim_t *anim, int32_t framenumber)
|
|
{
|
|
uint32_t cnt = anim->currentframe;
|
|
|
|
// handle first play and looping or rewinding
|
|
if (cnt > (uint32_t)framenumber)
|
|
cnt = 0;
|
|
|
|
do drawframe(anim, cnt++);
|
|
while (cnt < (uint32_t)framenumber);
|
|
|
|
anim->currentframe = framenumber;
|
|
return anim->imagebuffer;
|
|
}
|
|
|
|
|