/* d_surf.c rasterization driver surface heap manager Copyright (C) 1996-1997 Id Software, Inc. This program 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: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA */ #ifdef HAVE_CONFIG_H # include "config.h" #endif static __attribute__ ((used)) const char rcsid[] = "$Id$"; #include <stdlib.h> #include "QF/qargs.h" #include "QF/render.h" #include "QF/sys.h" #include "compat.h" #include "d_local.h" #include "r_local.h" float surfscale; qboolean r_cache_thrash; // set if surface cache is thrashing int sc_size; surfcache_t *sc_rover, *sc_base; #define GUARDSIZE 4 void * D_SurfaceCacheAddress (void) { return sc_base; } int D_SurfaceCacheForRes (int width, int height) { int size, pix; if (COM_CheckParm ("-surfcachesize")) { size = atoi (com_argv[COM_CheckParm ("-surfcachesize") + 1]) * 1024; return size; } size = SURFCACHE_SIZE_AT_320X200; pix = width * height; if (pix > 64000) size += (pix - 64000) * 3; return size; } static void D_CheckCacheGuard (void) { byte *s; int i; s = (byte *) sc_base + sc_size; for (i = 0; i < GUARDSIZE; i++) if (s[i] != (byte) i) Sys_Error ("D_CheckCacheGuard: failed"); } static void D_ClearCacheGuard (void) { byte *s; int i; s = (byte *) sc_base + sc_size; for (i = 0; i < GUARDSIZE; i++) s[i] = (byte) i; } void D_InitCaches (void *buffer, int size) { Sys_MaskPrintf (SYS_DEV, "D_InitCaches: %ik surface cache\n", size/1024); sc_size = size - GUARDSIZE; sc_base = (surfcache_t *) buffer; sc_rover = sc_base; sc_base->next = NULL; sc_base->owner = NULL; sc_base->size = sc_size; d_pzbuffer = vid.zbuffer; D_ClearCacheGuard (); } void D_FlushCaches (void) { surfcache_t *c; if (!sc_base) return; for (c = sc_base; c; c = c->next) { if (c->owner) *c->owner = NULL; } sc_rover = sc_base; sc_base->next = NULL; sc_base->owner = NULL; sc_base->size = sc_size; } static surfcache_t * D_SCAlloc (int width, int size) { surfcache_t *new; qboolean wrapped_this_time; if ((width < 0) || (width > 512)) // FIXME shouldn't really have a max Sys_Error ("D_SCAlloc: bad cache width %d", width); if ((size <= 0) || (size > 0x40000)) // FIXME ditto Sys_Error ("D_SCAlloc: bad cache size %d", size); // This adds the offset of data[0] in the surfcache_t struct. size += field_offset (surfcache_t, data); #define SIZE_ALIGN (sizeof (surfcache_t *) - 1) size = (size + SIZE_ALIGN) & ~SIZE_ALIGN; #undef SIZE_ALIGN size = (size + 3) & ~3; if (size > sc_size) Sys_Error ("D_SCAlloc: %i > cache size", size); // if there is not size bytes after the rover, reset to the start wrapped_this_time = false; if (!sc_rover || (byte *) sc_rover - (byte *) sc_base > sc_size - size) { if (sc_rover) { wrapped_this_time = true; } sc_rover = sc_base; } // colect and free surfcache_t blocks until the rover block is large enough new = sc_rover; if (sc_rover->owner) *sc_rover->owner = NULL; while (new->size < size) { // free another sc_rover = sc_rover->next; if (!sc_rover) Sys_Error ("D_SCAlloc: hit the end of memory"); if (sc_rover->owner) *sc_rover->owner = NULL; new->size += sc_rover->size; new->next = sc_rover->next; } // create a fragment out of any leftovers if (new->size - size > 256) { sc_rover = (surfcache_t *) ((byte *) new + size); sc_rover->size = new->size - size; sc_rover->next = new->next; sc_rover->width = 0; sc_rover->owner = NULL; new->next = sc_rover; new->size = size; } else sc_rover = new->next; new->width = width; // DEBUG if (width > 0) new->height = (size - sizeof (*new) + sizeof (new->data)) / width; new->owner = NULL; // should be set properly after return if (d_roverwrapped) { if (wrapped_this_time || (sc_rover >= d_initial_rover)) r_cache_thrash = true; } else if (wrapped_this_time) { d_roverwrapped = true; } D_CheckCacheGuard (); // DEBUG return new; } #if 0 static void D_SCDump (void) { surfcache_t *test; for (test = sc_base; test; test = test->next) { if (test == sc_rover) Sys_Printf ("ROVER:\n"); Sys_Printf ("%p : %i bytes %i width\n", test, test->size, test->width); } } #endif surfcache_t * D_CacheSurface (msurface_t *surface, int miplevel) { surfcache_t *cache; // if the surface is animating or flashing, flush the cache r_drawsurf.texture = R_TextureAnimation (surface); r_drawsurf.lightadj[0] = d_lightstylevalue[surface->styles[0]]; r_drawsurf.lightadj[1] = d_lightstylevalue[surface->styles[1]]; r_drawsurf.lightadj[2] = d_lightstylevalue[surface->styles[2]]; r_drawsurf.lightadj[3] = d_lightstylevalue[surface->styles[3]]; // see if the cache holds apropriate data cache = surface->cachespots[miplevel]; if (cache && !cache->dlight && surface->dlightframe != r_framecount && cache->texture == r_drawsurf.texture && cache->lightadj[0] == r_drawsurf.lightadj[0] && cache->lightadj[1] == r_drawsurf.lightadj[1] && cache->lightadj[2] == r_drawsurf.lightadj[2] && cache->lightadj[3] == r_drawsurf.lightadj[3]) return cache; // determine shape of surface surfscale = 1.0 / (1 << miplevel); r_drawsurf.surfmip = miplevel; r_drawsurf.surfwidth = surface->extents[0] >> miplevel; r_drawsurf.rowbytes = r_drawsurf.surfwidth; r_drawsurf.surfheight = surface->extents[1] >> miplevel; // allocate memory if needed if (!cache) { // if a texture just animated, don't reallocate it cache = D_SCAlloc (r_drawsurf.surfwidth, r_drawsurf.surfwidth * r_drawsurf.surfheight); surface->cachespots[miplevel] = cache; cache->owner = &surface->cachespots[miplevel]; cache->mipscale = surfscale; } if (surface->dlightframe == r_framecount) cache->dlight = 1; else cache->dlight = 0; r_drawsurf.surfdat = (byte *) cache->data; cache->texture = r_drawsurf.texture; cache->lightadj[0] = r_drawsurf.lightadj[0]; cache->lightadj[1] = r_drawsurf.lightadj[1]; cache->lightadj[2] = r_drawsurf.lightadj[2]; cache->lightadj[3] = r_drawsurf.lightadj[3]; // draw and light the surface texture r_drawsurf.surf = surface; c_surf++; R_DrawSurface (); return surface->cachespots[miplevel]; }