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AllocBlock: cache index of last used lightmap, start search there

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Eric Wasylishen 2014-05-19 21:41:18 -06:00
parent 4cbf5f3f4f
commit a63b21c939
1 changed files with 9 additions and 2 deletions
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11
Quake/r_brush.c
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@ -45,6 +45,7 @@ qboolean lightmap_modified[MAX_LIGHTMAPS];
glRect_t lightmap_rectchange[MAX_LIGHTMAPS];
int allocated[MAX_LIGHTMAPS][BLOCK_WIDTH];
int last_lightmap_allocated; //ericw -- optimization: remember the index of the last lightmap AllocBlock stored a surf in
// the lightmap texture data needs to be kept in
// main memory so texsubimage can update properly
@ -721,7 +722,12 @@ int AllocBlock (int w, int h, int *x, int *y)
int best, best2;
int texnum;
for (texnum=0 ; texnum<MAX_LIGHTMAPS ; texnum++)
// ericw -- rather than searching starting at lightmap 0 every time,
// start at the last lightmap we allocated a surface in.
// This makes AllocBlock much faster on large levels (can shave off 3+ seconds
// of load time on a level with 180 lightmaps), at a cost of not quite packing
// lightmaps as tightly vs. not doing this (uses ~5% more lightmaps)
for (texnum=last_lightmap_allocated ; texnum<MAX_LIGHTMAPS ; texnum++, last_lightmap_allocated++)
{
best = BLOCK_HEIGHT;
@ -870,7 +876,8 @@ void GL_BuildLightmaps (void)
qmodel_t *m;
memset (allocated, 0, sizeof(allocated));
last_lightmap_allocated = 0;
r_framecount = 1; // no dlightcache
//johnfitz -- null out array (the gltexture objects themselves were already freed by Mod_ClearAll)