github-code/lvgl
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix(draw) underflow in subpixel font drawing

Browse Source 
Fixes: #2273
This commit is contained in:
Gabor Kiss-Vamosi
2021-06-15 19:33:11 +02:00
parent 3abe517abf
commit 6d5ac702ad
1 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/draw/lv_draw_label.c
View File

@@ -664,6 +664,14 @@ static void draw_letter_subpx(lv_coord_t pos_x, lv_coord_t pos_y, lv_font_glyph_
int32_t col_bit;
col_bit = bit_ofs & 0x7; /*"& 0x7" equals to "% 8" just faster*/
lv_area_t map_area;
map_area.x1 = col_start / 3 + pos_x;
map_area.x2 = col_end / 3 + pos_x - 1;
map_area.y1 = row_start + pos_y;
map_area.y2 = map_area.y1;
if(map_area.x2 <= map_area.x1) return;
int32_t mask_buf_size = box_w * box_h > _LV_MASK_BUF_MAX_SIZE ? _LV_MASK_BUF_MAX_SIZE : g->box_w * g->box_h;
lv_opa_t * mask_buf = lv_mem_buf_get(mask_buf_size);
int32_t mask_p = 0;
@@ -682,12 +690,6 @@ static void draw_letter_subpx(lv_coord_t pos_x, lv_coord_t pos_y, lv_font_glyph_
/*If the letter is partially out of mask the move there on draw_buf*/
disp_buf_buf_tmp += (row_start * disp_buf_width) + col_start / 3;
lv_area_t map_area;
map_area.x1 = col_start / 3 + pos_x;
map_area.x2 = col_end / 3 + pos_x - 1;
map_area.y1 = row_start + pos_y;
map_area.y2 = map_area.y1;
uint8_t other_mask_cnt = lv_draw_mask_get_cnt();
uint8_t font_rgb[3];