arno/trezor-firmware
1
0
Fork 0
mirror of https://github.com/trezor/trezor-firmware.git synced 2024-12-20 21:38:26 +00:00
Code Issues Releases Wiki Activity

fix(core): fix alpha component extraction

Browse Source 
[no changelog]
This commit is contained in:
tychovrahe 2024-05-17 15:03:04 +02:00 committed by TychoVrahe
parent ad84f42b0b
commit c9027b1a1a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
core/embed/lib/gfx_color.h
View File

@ -76,7 +76,7 @@ typedef uint32_t gfx_color32_t;
// Extracts blue component from gfx_color32_t
#define gfx_color32_to_b(c) (((c) & 0x000000FF) >> 0)
// Extracts alpha component from gfx_color32_t
#define gfx_color32_to_a(c) (((c) & 0xFF000000) >> 0)
#define gfx_color32_to_a(c) (((c) & 0xFF000000) >> 24)
// 4-bit linear interpolation between `fg` and `bg`
#define a4_lerp(fg, bg, alpha) (((fg) * (alpha) + ((bg) * (15 - (alpha)))) / 15)