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fix(core): fix alpha component extraction

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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
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core/embed/lib/gfx_color.h
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@ -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)