ref: 0b9b33f9b960cd9c56b4d7d7030b8d4676610d4f
dir: /QW/client/d_surf.c/
/* 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 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ // d_surf.c: rasterization driver surface heap manager #include "quakedef.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 int D_SurfaceCacheForRes (int width, int height) { int size, pix; if (COM_CheckParm ("-surfcachesize")) { size = Q_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; } 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"); } void D_ClearCacheGuard (void) { byte *s; int i; s = (byte *)sc_base + sc_size; for (i=0 ; i<GUARDSIZE ; i++) s[i] = (byte)i; } /* ================ D_InitCaches ================ */ void D_InitCaches (void *buffer, int size) { // if (!msg_suppress_1) // Con_Printf ("%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_ClearCacheGuard (); } /* ================== D_FlushCaches ================== */ 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; } /* ================= D_SCAlloc ================= */ surfcache_t *D_SCAlloc (int width, int size) { surfcache_t *new; qboolean wrapped_this_time; if ((width < 0) || (width > 256)) Sys_Error ("D_SCAlloc: bad cache width %d\n", width); if ((size <= 0) || (size > 0x10000)) Sys_Error ("D_SCAlloc: bad cache size %d\n", size); #ifdef __alpha__ size = (int)((long)&((surfcache_t *)0)->data[size]); #else size = (int)&((surfcache_t *)0)->data[size]; #endif 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; } /* ================= D_SCDump ================= */ void D_SCDump (void) { surfcache_t *test; for (test = sc_base ; test ; test = test->next) { if (test == sc_rover) Sys_Printf ("ROVER:\n"); printf ("%p : %i bytes %i width\n",test, test->size, test->width); } } //============================================================================= // if the num is not a power of 2, assume it will not repeat int MaskForNum (int num) { if (num==128) return 127; if (num==64) return 63; if (num==32) return 31; if (num==16) return 15; return 255; } int D_log2 (int num) { int c; c = 0; while (num>>=1) c++; return c; } //============================================================================= /* ================ D_CacheSurface ================ */ 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->texinfo->texture); 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 = (pixel_t *)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]; }