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bottom shadow: add blur

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This commit is contained in:
Gabor Kiss-Vamosi 2018-03-05 17:14:45 +01:00
parent 69eb3a9756
commit 0b6be3a0f6
1 changed files with 14 additions and 6 deletions
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20
lv_draw/lv_draw.c
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@ -1859,7 +1859,7 @@ static void lv_draw_shadow_bottom(const lv_area_t * coords, const lv_area_t * ma
lv_opa_t line_1d_blur[swidth]; lv_opa_t line_1d_blur[swidth];
for(col = 0; col < swidth; col++) { for(col = 0; col < swidth; col++) {
line_1d_blur[col] = (uint32_t)((uint32_t)(swidth - col) * style->body.opa) / (swidth); line_1d_blur[col] = (uint32_t)((uint32_t)(swidth - col) * style->body.opa / 2) / (swidth);
} }
lv_point_t point_l; lv_point_t point_l;
@ -1875,22 +1875,30 @@ static void lv_draw_shadow_bottom(const lv_area_t * coords, const lv_area_t * ma
ofs_r.y = coords->y2 - radius + 1 - LV_ANTIALIAS; ofs_r.y = coords->y2 - radius + 1 - LV_ANTIALIAS;
for(col = 0; col <= radius; col++) { for(col = 0; col <= radius; col++) {
point_l.x = ofs_l.x + radius - col - radius; point_l.x = ofs_l.x - col ;
point_l.y = ofs_l.y + curve_x[col]; point_l.y = ofs_l.y + curve_x[col];
point_r.x = ofs_r.x + col; point_r.x = ofs_r.x + col;
point_r.y = ofs_r.y + curve_x[col]; point_r.y = ofs_r.y + curve_x[col];
lv_opa_t px_opa;
int16_t diff = col == 0 ? 0 : curve_x[col-1] - curve_x[col];
uint16_t d; uint16_t d;
for(d = 0; d < swidth; d++) { for(d = 0; d < swidth; d++) {
px_fp(point_l.x, point_l.y, mask, style->body.shadow.color, line_1d_blur[d]); /*When stepping a pixel in y calculate the average with the pixel from the prev. column to make a blur */
if(diff == 0) {
px_opa = line_1d_blur[d];
} else {
px_opa = (uint16_t)((uint16_t)line_1d_blur[d] + line_1d_blur[d - diff]) >> 1;
}
px_fp(point_l.x, point_l.y, mask, style->body.shadow.color, px_opa);
point_l.y ++; point_l.y ++;
/*Don't overdraw th pixel on the middle*/ /*Don't overdraw the pixel on the middle*/
if(point_r.x > ofs_l.x) { if(point_r.x > ofs_l.x) {
px_fp(point_r.x, point_r.y, mask, style->body.shadow.color, line_1d_blur[d]); px_fp(point_r.x, point_r.y, mask, style->body.shadow.color, px_opa);
point_r.y ++;
} }
point_r.y ++;
} }
} }