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canvas blur optimization

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This commit is contained in:
Gabor Kiss-Vamosi 2019-11-06 14:20:40 +01:00
parent 453165a34c
commit 32fb95e7af
1 changed files with 14 additions and 10 deletions
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24
src/lv_objx/lv_canvas.c
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@ -491,6 +491,7 @@ void lv_canvas_blur_ver(lv_obj_t * canvas, uint16_t r)
if((r & 0x1) == 0) r_back--;
bool has_alpha = lv_img_cf_has_alpha(ext->dsc.header.cf);
lv_coord_t col_w = lv_img_buf_get_img_size(1, ext->dsc.header.h, ext->dsc.header.cf);
uint8_t * col_buf = lv_draw_buf_get(col_w);
lv_img_dsc_t line_img;
@ -512,38 +513,41 @@ void lv_canvas_blur_ver(lv_obj_t * canvas, uint16_t r)
uint32_t bsum = 0;
lv_color_t c;
lv_opa_t opa = LV_OPA_TRANSP;
lv_opa_t opa = LV_OPA_COVER;
for(y = -r_back; y <= r_front; y++) {
y_safe = y < 0 ? 0 : y;
c = lv_img_buf_get_px_color(&ext->dsc, x, y_safe, style->image.color, false);
opa = lv_img_buf_get_px_alpha(&ext->dsc, x, y_safe, false);
if(has_alpha) opa = lv_img_buf_get_px_alpha(&ext->dsc, x, y_safe, false);
lv_img_buf_set_px_color(&line_img, 0, y_safe, c, false);
lv_img_buf_set_px_alpha(&line_img, 0, y_safe, opa, false);
if(has_alpha) lv_img_buf_set_px_alpha(&line_img, 0, y_safe, opa, false);
rsum += c.ch.red;
gsum += c.ch.green;
bsum += c.ch.blue;
asum += opa;
if(has_alpha) asum += opa;
}
/*Just to indicate that the px is visible*/
if(has_alpha == false) asum = LV_OPA_COVER;
for(y = 0; y < ext->dsc.header.h; y++) {
if(asum) {
c.ch.red = rsum / r;
c.ch.green = gsum / r;
c.ch.blue = bsum / r;
opa = asum / r;
if(has_alpha) opa = asum / r;
lv_img_buf_set_px_color(&ext->dsc, x, y, c, false);
}
lv_img_buf_set_px_alpha(&ext->dsc, x, y, opa, false);
if(has_alpha) lv_img_buf_set_px_alpha(&ext->dsc, x, y, opa, false);
y_safe = y - r_back;
y_safe = y_safe < 0 ? 0 : y_safe;
c = lv_img_buf_get_px_color(&line_img, 0, y_safe, style->image.color, false);
opa = lv_img_buf_get_px_alpha(&line_img, 0, y_safe, false);
if(has_alpha) opa = lv_img_buf_get_px_alpha(&line_img, 0, y_safe, false);
rsum -= c.ch.red;
gsum -= c.ch.green;
@ -554,15 +558,15 @@ void lv_canvas_blur_ver(lv_obj_t * canvas, uint16_t r)
y_safe = y_safe > ext->dsc.header.h - 1 ? ext->dsc.header.h - 1 : y_safe;
c = lv_img_buf_get_px_color(&ext->dsc, x, y_safe, style->image.color, false);
opa = lv_img_buf_get_px_alpha(&ext->dsc, x, y_safe, false);
if(has_alpha) opa = lv_img_buf_get_px_alpha(&ext->dsc, x, y_safe, false);
lv_img_buf_set_px_color(&line_img, 0, y_safe, c, false);
lv_img_buf_set_px_alpha(&line_img, 0, y_safe, opa, false);
if(has_alpha) lv_img_buf_set_px_alpha(&line_img, 0, y_safe, opa, false);
rsum += c.ch.red;
gsum += c.ch.green;
bsum += c.ch.blue;
asum += opa;
if(has_alpha) asum += opa;
}
}