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lv_img_buf_tranform: fix inaccurate color mixing

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This commit is contained in:
Gabor Kiss-Vamosi 2020-03-24 20:59:12 +01:00
parent b40c5ada05
commit 83770e004c
1 changed files with 15 additions and 3 deletions
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18
src/lv_draw/lv_img_buf.c
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@ -714,10 +714,22 @@ static inline bool transform_anti_alias(lv_img_transform_dsc_t * dsc)
dsc->res.opa = LV_OPA_COVER; dsc->res.opa = LV_OPA_COVER;
} }
lv_color_t c0 = lv_color_mix(c00, c01, xr0); lv_color_t c0;
lv_color_t c1 = lv_color_mix(c10, c11, xr1); if(xr0 == LV_OPA_TRANSP) c0 = c01;
else if(xr0 == LV_OPA_COVER) c0 = c00;
else if(c00.full == c01.full) c0 = c00;
else c0 = lv_color_mix(c00, c01, xr0);
dsc->res.color = lv_color_mix(c0, c1, yr); lv_color_t c1;
if(xr1 == LV_OPA_TRANSP) c1 = c11;
else if(xr1 == LV_OPA_COVER) c1 = c10;
else if(c10.full == c11.full) c1 = c00;
else c1 = lv_color_mix(c10, c11, xr1);
if(yr == LV_OPA_TRANSP) dsc->res.color = c1;
else if(yr == LV_OPA_COVER) dsc->res.color = c0;
else if(c0.full == c1.full) dsc->res.color = c0;
else dsc->res.color = lv_color_mix(c0, c1, yr);
return true; return true;
} }