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e0ad1aa0cd
* operate on a parameter-specified data structure instead of a global one * moved error checks into the library code.
144 lines
5.3 KiB
C
144 lines
5.3 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 (jf@jonof.id.au)
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*/
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//-------------------------------------------------------------------------
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#include <stdint.h>
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/////////////////////////////////////////////////////////////////////////////
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//
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// ANIMLIB.H
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//
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/////////////////////////////////////////////////////////////////////////////
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#pragma once
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#ifndef animlib_public_h_
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#define animlib_public_h_
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# pragma pack(push,1)
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/* structure declarations for deluxe animate large page files, doesn't
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need to be in the header because there are no exposed functions
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that use any of this directly */
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struct lpfileheader
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{
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uint32_t id; /* 4 uint8_tacter ID == "LPF " */
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uint16_t maxLps; /* max # largePages allowed. 256 FOR NOW. */
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uint16_t nLps; /* # largePages in this file. */
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uint32_t nRecords; /* # records in this file. 65534 is current limit + ring */
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uint16_t maxRecsPerLp; /* # records permitted in an lp. 256 FOR NOW. */
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uint16_t lpfTableOffset; /* Absolute Seek position of lpfTable. 1280 FOR NOW. */
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uint32_t contentType; /* 4 character ID == "ANIM" */
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uint16_t width; /* Width of screen in pixels. */
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uint16_t height; /* Height of screen in pixels. */
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uint8_t variant; /* 0==ANIM. */
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uint8_t version; /* 0==frame rate in 18/sec, 1= 70/sec */
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uint8_t hasLastDelta; /* 1==Last record is a delta from last-to-first frame. */
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uint8_t lastDeltaValid; /* 0==Ignore ring frame. */
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uint8_t pixelType; /* 0==256 color. */
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uint8_t CompressionType; /* 1==(RunSkipDump) Only one used FOR NOW. */
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uint8_t otherRecsPerFrm; /* 0 FOR NOW. */
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uint8_t bitmaptype; /* 1==320x200, 256-color. Only one implemented so far. */
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uint8_t recordTypes[32]; /* Not yet implemented. */
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uint32_t nFrames; /* Number of actual frames in the file, includes ring frame. */
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uint16_t framesPerSecond; /* Number of frames to play per second. */
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uint16_t pad2[29]; /* 58 bytes of filler to round up to 128 bytes total. */
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};
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// this is the format of a large page structure
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struct lp_descriptor
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{
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uint16_t baseRecord; // Number of first record in this large page.
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uint16_t nRecords; // Number of records in lp.
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// bit 15 of "nRecords" == "has continuation from previous lp".
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// bit 14 of "nRecords" == "final record continues on next lp".
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uint16_t nBytes; // Total number of bytes of contents, excluding header.
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};
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#pragma pack(pop)
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#define IMAGEBUFFERSIZE 0x10000
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struct anim_t
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{
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uint16_t framecount; // current frame of anim
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lpfileheader * lpheader; // file header will be loaded into this structure
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lp_descriptor * LpArray; // arrays of large page structs used to find frames
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uint16_t curlpnum; // initialize to an invalid Large page number
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lp_descriptor * curlp; // header of large page currently in memory
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uint16_t * thepage; // buffer where current large page is loaded
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uint8_t imagebuffer[IMAGEBUFFERSIZE]; // buffer where anim frame is decoded
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uint8_t * buffer;
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uint8_t pal[768];
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int32_t currentframe;
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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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// Setup internal anim data structure
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//
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//****************************************************************************
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int32_t ANIM_LoadAnim(anim_t *anim, uint8_t *buffer, int32_t length);
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//****************************************************************************
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//
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// ANIM_NumFrames ()
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//
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// returns the number of frames in the current anim
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//
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//****************************************************************************
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inline int32_t ANIM_NumFrames(anim_t* anim)
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{
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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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// Draw the frame to a returned buffer
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//
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//****************************************************************************
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uint8_t * ANIM_DrawFrame(anim_t* anim, int32_t framenumber);
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//****************************************************************************
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//
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// ANIM_GetPalette ()
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//
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// return the palette of the anim
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//****************************************************************************
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inline uint8_t* ANIM_GetPalette(anim_t* anim)
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{
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return anim->pal;
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}
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#endif
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