mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-06 13:11:20 +00:00
325 lines
6.8 KiB
C
325 lines
6.8 KiB
C
/*
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d_surf.c
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rasterization driver surface heap manager
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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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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include "d_local.h"
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#include "QF/qargs.h"
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#include "r_local.h"
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#include "QF/sys.h"
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float surfscale;
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qboolean r_cache_thrash; // set if surface cache is thrashing
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int sc_size;
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surfcache_t *sc_rover, *sc_base;
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#define GUARDSIZE 4
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void *
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D_SurfaceCacheAddress (void)
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{
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return sc_base;
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}
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int
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D_SurfaceCacheForRes (int width, int height)
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{
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int size, pix;
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if (COM_CheckParm ("-surfcachesize")) {
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size = atoi (com_argv[COM_CheckParm ("-surfcachesize") + 1]) * 1024;
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return size;
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}
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size = SURFCACHE_SIZE_AT_320X200;
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pix = width * height;
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if (pix > 64000)
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size += (pix - 64000) * 3;
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return size;
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}
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void
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D_CheckCacheGuard (void)
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{
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byte *s;
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int i;
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s = (byte *) sc_base + sc_size;
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for (i = 0; i < GUARDSIZE; i++)
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if (s[i] != (byte) i)
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Sys_Error ("D_CheckCacheGuard: failed");
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}
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void
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D_ClearCacheGuard (void)
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{
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byte *s;
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int i;
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s = (byte *) sc_base + sc_size;
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for (i = 0; i < GUARDSIZE; i++)
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s[i] = (byte) i;
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}
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void
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D_InitCaches (void *buffer, int size)
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{
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// if (!msg_suppress_1)
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// Con_Printf ("%ik surface cache\n", size/1024);
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sc_size = size - GUARDSIZE;
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sc_base = (surfcache_t *) buffer;
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sc_rover = sc_base;
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sc_base->next = NULL;
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sc_base->owner = NULL;
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sc_base->size = sc_size;
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d_pzbuffer = vid.zbuffer;
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D_ClearCacheGuard ();
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}
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void
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D_FlushCaches (void)
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{
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surfcache_t *c;
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if (!sc_base)
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return;
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for (c = sc_base; c; c = c->next) {
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if (c->owner)
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*c->owner = NULL;
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}
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sc_rover = sc_base;
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sc_base->next = NULL;
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sc_base->owner = NULL;
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sc_base->size = sc_size;
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}
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surfcache_t *
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D_SCAlloc (int width, int size)
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{
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surfcache_t *new;
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qboolean wrapped_this_time;
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if ((width < 0) || (width > 256))
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Sys_Error ("D_SCAlloc: bad cache width %d\n", width);
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if ((size <= 0) || (size > 0x10000))
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Sys_Error ("D_SCAlloc: bad cache size %d\n", size);
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/* This adds the offset of data[0] in the surfcache_t struct. */
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size += (int) ((surfcache_t *) 0)->data;
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#define SIZE_ALIGN (sizeof(surfcache_t*)-1)
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size = (size + SIZE_ALIGN) & ~SIZE_ALIGN;
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#undef SIZE_ALIGN
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size = (size + 3) & ~3;
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if (size > sc_size)
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Sys_Error ("D_SCAlloc: %i > cache size", size);
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// if there is not size bytes after the rover, reset to the start
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wrapped_this_time = false;
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if (!sc_rover || (byte *) sc_rover - (byte *) sc_base > sc_size - size) {
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if (sc_rover) {
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wrapped_this_time = true;
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}
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sc_rover = sc_base;
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}
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// colect and free surfcache_t blocks until the rover block is large enough
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new = sc_rover;
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if (sc_rover->owner)
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*sc_rover->owner = NULL;
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while (new->size < size) {
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// free another
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sc_rover = sc_rover->next;
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if (!sc_rover)
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Sys_Error ("D_SCAlloc: hit the end of memory");
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if (sc_rover->owner)
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*sc_rover->owner = NULL;
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new->size += sc_rover->size;
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new->next = sc_rover->next;
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}
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// create a fragment out of any leftovers
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if (new->size - size > 256) {
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sc_rover = (surfcache_t *) ((byte *) new + size);
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sc_rover->size = new->size - size;
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sc_rover->next = new->next;
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sc_rover->width = 0;
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sc_rover->owner = NULL;
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new->next = sc_rover;
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new->size = size;
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} else
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sc_rover = new->next;
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new->width = width;
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// DEBUG
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if (width > 0)
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new->height = (size - sizeof (*new) + sizeof (new->data)) / width;
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new->owner = NULL; // should be set properly after return
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if (d_roverwrapped) {
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if (wrapped_this_time || (sc_rover >= d_initial_rover))
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r_cache_thrash = true;
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} else if (wrapped_this_time) {
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d_roverwrapped = true;
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}
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D_CheckCacheGuard (); // DEBUG
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return new;
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}
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void
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D_SCDump (void)
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{
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surfcache_t *test;
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for (test = sc_base; test; test = test->next) {
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if (test == sc_rover)
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Sys_Printf ("ROVER:\n");
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Sys_Printf ("%p : %i bytes %i width\n", test, test->size,
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test->width);
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}
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}
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// if the num is not a power of 2, assume it will not repeat
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int
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MaskForNum (int num)
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{
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if (num == 128)
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return 127;
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if (num == 64)
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return 63;
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if (num == 32)
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return 31;
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if (num == 16)
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return 15;
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return 255;
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}
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int
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D_log2 (int num)
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{
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int c;
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c = 0;
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while (num >>= 1)
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c++;
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return c;
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}
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surfcache_t *
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D_CacheSurface (msurface_t *surface, int miplevel)
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{
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surfcache_t *cache;
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// if the surface is animating or flashing, flush the cache
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r_drawsurf.texture = R_TextureAnimation (surface->texinfo->texture);
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r_drawsurf.lightadj[0] = d_lightstylevalue[surface->styles[0]];
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r_drawsurf.lightadj[1] = d_lightstylevalue[surface->styles[1]];
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r_drawsurf.lightadj[2] = d_lightstylevalue[surface->styles[2]];
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r_drawsurf.lightadj[3] = d_lightstylevalue[surface->styles[3]];
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// see if the cache holds apropriate data
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cache = surface->cachespots[miplevel];
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if (cache && !cache->dlight && surface->dlightframe != r_framecount
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&& cache->texture == r_drawsurf.texture
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&& cache->lightadj[0] == r_drawsurf.lightadj[0]
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&& cache->lightadj[1] == r_drawsurf.lightadj[1]
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&& cache->lightadj[2] == r_drawsurf.lightadj[2]
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&& cache->lightadj[3] == r_drawsurf.lightadj[3])
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return cache;
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// determine shape of surface
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surfscale = 1.0 / (1 << miplevel);
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r_drawsurf.surfmip = miplevel;
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r_drawsurf.surfwidth = surface->extents[0] >> miplevel;
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r_drawsurf.rowbytes = r_drawsurf.surfwidth;
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r_drawsurf.surfheight = surface->extents[1] >> miplevel;
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// allocate memory if needed
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if (!cache) // if a texture just animated, don't
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// reallocate it
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{
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cache = D_SCAlloc (r_drawsurf.surfwidth,
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r_drawsurf.surfwidth * r_drawsurf.surfheight);
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surface->cachespots[miplevel] = cache;
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cache->owner = &surface->cachespots[miplevel];
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cache->mipscale = surfscale;
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}
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if (surface->dlightframe == r_framecount)
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cache->dlight = 1;
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else
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cache->dlight = 0;
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r_drawsurf.surfdat = (pixel_t *) cache->data;
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cache->texture = r_drawsurf.texture;
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cache->lightadj[0] = r_drawsurf.lightadj[0];
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cache->lightadj[1] = r_drawsurf.lightadj[1];
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cache->lightadj[2] = r_drawsurf.lightadj[2];
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cache->lightadj[3] = r_drawsurf.lightadj[3];
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// draw and light the surface texture
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r_drawsurf.surf = surface;
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c_surf++;
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R_DrawSurface ();
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return surface->cachespots[miplevel];
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}
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