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perf(draw) reimplement circle drawing algorithms (#2374)

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* perf(draw) reimplement circle drawing algorithms

Imporve the speed of circle drawing
Add circle draw caching
Various other speed improvements

* docs describe how to use masks

* fix(draw) add missing GC root usage
This commit is contained in:
Gabor Kiss-Vamosi
2021-07-27 19:16:00 +02:00
committed by GitHub
parent e23701e2c2
commit 637b706ddc
25 changed files with 517 additions and 323 deletions
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7
lv_conf_template.h
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@@ -95,6 +95,13 @@
*LV_SHADOW_CACHE_SIZE is the max. shadow size to buffer, where shadow size is `shadow_width + radius`
*Caching has LV_SHADOW_CACHE_SIZE^2 RAM cost*/
#define LV_SHADOW_CACHE_SIZE 0
/* Set number of maximally cached circle data.
* The circumference of 1/4 circle are saved for anti-aliasing
* radius * 4 bytes are used per circle (the most often used radiuses are saved)
* 0: to disable caching */
#define LV_CIRCLE_CACHE_SIZE 4
#endif /*LV_DRAW_COMPLEX*/
/*Default image cache size. Image caching keeps the images opened.