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ericw's AllocBlock optimization

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This commit is contained in:
moto 2022-05-19 12:19:25 -04:00
parent e54c7d1ea4
commit 431f5bd09f
1 changed files with 19 additions and 8 deletions
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27
source/psp/video_hardware_surface.cpp
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@ -40,6 +40,7 @@ extern int LIGHTMAP_BYTES;
using namespace quake;
int skytexturenum;
int last_lightmap_allocated; // ericw -- optimization: remember the index of the last lightmap AllocBlock stored a surf in
#define BLOCK_WIDTH 128
#define BLOCK_HEIGHT 128
@ -1627,14 +1628,23 @@ void R_MarkLeaves (void)
=============================================================================
*/
// returns a texture number and the position inside it
static int AllocBlock (int w, int h, int *x, int *y)
/*
========================
AllocBlock -- returns a texture number and the position inside it
========================
*/
int AllocBlock (int w, int h, int *x, int *y)
{
int i, j;
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;
@ -1657,17 +1667,16 @@ static int AllocBlock (int w, int h, int *x, int *y)
}
if (best + h > BLOCK_HEIGHT)
{
//Con_Printf("best + h > BLOCK_HEIGHT\n");
continue;
}
for (i=0 ; i<w ; i++)
allocated[texnum][*x + i] = best + h;
return texnum;
}
Host_Error("AllocBlock: full\n");
return 0;
Sys_Error ("AllocBlock: full");
return 0; //johnfitz -- shut up compiler
}
mvertex_t *r_pcurrentvertbase;
@ -1862,6 +1871,8 @@ void GL_BuildLightmaps (void)
r_framecount = 1; // no dlightcache
last_lightmap_allocated = 0;
if (!lightmap_textures)
{
lightmap_textures = 0;