mirror of
https://git.code.sf.net/p/quake/quakeforge
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54604d9aa2
For now, the functions check for a null hunk pointer and use the global hunk (initialized via Memory_Init) if necessary. However, Hunk_Init is available (and used by Memory_Init) to create a hunk from any arbitrary memory block. So long as that block is 64-byte aligned, allocations within the hunk will remain 64-byte aligned.
131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/*
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sw_model_alias.c
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alias model loading and caching for the software renderer
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Copyright (C) 1996-1997 Id Software, Inc.
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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.
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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:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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// models are the only shared resource between a client and server running
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// on the same machine.
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/qendian.h"
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#include "QF/sys.h"
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#include "compat.h"
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#include "d_iface.h"
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#include "mod_internal.h"
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// a pose is a single set of vertexes. a frame may be
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// an animating sequence of poses
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void *
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sw_Mod_LoadSkin (mod_alias_ctx_t *alias_ctx, byte *skin,
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int skinsize, int snum, int gnum,
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qboolean group, maliasskindesc_t *skindesc)
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{
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byte *pskin;
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pskin = Hunk_AllocName (0, skinsize, alias_ctx->mod->name);
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skindesc->skin = (byte *) pskin - (byte *) alias_ctx->header;
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memcpy (pskin, skin, skinsize);
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return skin + skinsize;
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}
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static void
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process_frame (mod_alias_ctx_t *alias_ctx, maliasframedesc_t *frame,
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int posenum, int extra)
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{
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aliashdr_t *header = alias_ctx->header;
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int size = header->mdl.numverts * sizeof (trivertx_t);
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trivertx_t *frame_verts;
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if (extra)
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size *= 2;
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frame_verts = Hunk_AllocName (0, size, alias_ctx->mod->name);
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frame->frame = (byte *) frame_verts - (byte *) header;
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// The low-order 8 bits (actually, fractional) are completely separate
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// from the high-order bits (see R_AliasTransformFinalVert16 in
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// sw_ralias.c), but in adjacant arrays. This means we can get away with
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// just one memcpy as there are no endian issues.
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memcpy (frame_verts, alias_ctx->poseverts.a[posenum], size);
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}
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void
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sw_Mod_MakeAliasModelDisplayLists (mod_alias_ctx_t *alias_ctx, void *_m,
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int _s, int extra)
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{
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aliashdr_t *header = alias_ctx->header;
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int i, j;
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int posenum = 0;
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int numv = header->mdl.numverts, numt = header->mdl.numtris;
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stvert_t *stverts;
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mtriangle_t *tris;
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stverts = (stvert_t *) Hunk_AllocName (0, numv * sizeof (stvert_t),
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alias_ctx->mod->name);
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tris = (mtriangle_t *) Hunk_AllocName (0, numt * sizeof (mtriangle_t),
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alias_ctx->mod->name);
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header->stverts = (byte *) stverts - (byte *) header;
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header->triangles = (byte *) tris - (byte *) header;
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for (i = 0; i < numv; i++) {
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stverts[i].onseam = alias_ctx->stverts.a[i].onseam;
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stverts[i].s = alias_ctx->stverts.a[i].s << 16;
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stverts[i].t = alias_ctx->stverts.a[i].t << 16;
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}
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for (i = 0; i < numt; i++) {
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tris[i].facesfront = alias_ctx->triangles.a[i].facesfront;
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VectorCopy (alias_ctx->triangles.a[i].vertindex, tris[i].vertindex);
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}
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for (i = 0; i < header->mdl.numframes; i++) {
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maliasframedesc_t *frame = header->frames + i;
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if (frame->type) {
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maliasgroup_t *group;
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group = (maliasgroup_t *) ((byte *) header + frame->frame);
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for (j = 0; j < group->numframes; j++) {
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__auto_type frame = (maliasframedesc_t *) &group->frames[j];
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process_frame (alias_ctx, frame, posenum++, extra);
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}
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} else {
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process_frame (alias_ctx, frame, posenum++, extra);
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}
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}
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}
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