[Git][freetype/freetype-demos][master] [graph] Better hash function and a fix.

[Alexei Podtelezhnikov (@apodtele)]

Alexei Podtelezhnikov pushed to branch master at FreeType / FreeType Demo Programs

Commits:

• d8cd0813
  by Alexei Podtelezhnikov at 2022-08-27T23:48:59-04:00

  [graph] Better hash function and a fix.
  
  * graph/gblender.c (gblender_clear): Initialize recently grown array.
  (gblender_lookup_channel): Improve hash function.
  

1 changed file:

• graph/gblender.c

Changes:

graph/gblender.c

---

...	...	@@ -126,7 +126,9 @@ gblender_clear( GBlender blender )
126	126	{
127	127	GBlenderChanKey chan_keys = (GBlenderChanKey) blender->keys;
128	128
129		- for ( nn = 0; nn < GBLENDER_KEY_COUNT; nn++ )
	129	+ for ( nn = 0;
	130	+ nn < GBLENDER_KEY_COUNT*GBLENDER_CELL_SIZE*sizeof(GBlenderCell);
	131	+ nn++ )
130	132	chan_keys[nn].index = -1;
131	133
132	134	blender->cache_r_back = 0;
...	...	@@ -352,7 +354,7 @@ gblender_lookup_channel( GBlender blender,
352	354	blender->stat_lookups++;
353	355	#endif
354	356
355		- idx = ( background ^ foreground * 7 ) %
	357	+ idx = ( background ^ foreground * 59 ) %
356	358	( GBLENDER_KEY_COUNT*GBLENDER_CELL_SIZE*sizeof(GBlenderCell) - 1);
357	359
358	360	key = (GBlenderChanKey)blender->keys + idx;

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