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fix(draw_buf): handle negative coordinates on the area to clear (#6510)

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Gabor Kiss-Vamosi 2024-07-26 08:23:50 +02:00 committed by GitHub
parent 966d952bb7
commit 6828a9b257
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GPG Key ID: B5690EEEBB952194
1 changed files with 19 additions and 15 deletions
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34
src/draw/lv_draw_buf.c
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@ -154,30 +154,34 @@ void lv_draw_buf_flush_cache_user(const lv_draw_buf_handlers_t * handlers, const
void lv_draw_buf_clear(lv_draw_buf_t * draw_buf, const lv_area_t * a)
{
LV_ASSERT_NULL(draw_buf);
if(a && lv_area_get_width(a) < 0) return;
if(a && lv_area_get_height(a) < 0) return;
const lv_image_header_t * header = &draw_buf->header;
uint32_t stride = header->stride;
if(a == NULL) {
/*Need skip the palette if exists*/
uint8_t * bufc = lv_draw_buf_goto_xy(draw_buf, 0, 0);
lv_memzero(bufc, header->h * stride);
uint8_t * buf = lv_draw_buf_goto_xy(draw_buf, 0, 0);
lv_memzero(buf, header->h * stride);
return;
}
uint8_t * bufc;
uint32_t line_length;
int32_t start_y, end_y;
lv_area_t a_draw_buf;
a_draw_buf.x1 = 0;
a_draw_buf.y1 = 0;
a_draw_buf.x2 = draw_buf->header.w - 1;
a_draw_buf.y2 = draw_buf->header.h - 1;
lv_area_t a_clipped;
if(!_lv_area_intersect(&a_clipped, a, &a_draw_buf)) return;
if(lv_area_get_width(&a_clipped) <= 0) return;
if(lv_area_get_height(&a_clipped) <= 0) return;
uint8_t px_size = lv_color_format_get_size(header->cf);
bufc = lv_draw_buf_goto_xy(draw_buf, a->x1, a->y1);
line_length = lv_area_get_width(a) * px_size;
start_y = a->y1;
end_y = a->y2;
for(; start_y <= end_y; start_y++) {
lv_memzero(bufc, line_length);
bufc += stride;
uint8_t * buf = lv_draw_buf_goto_xy(draw_buf, a_clipped.x1, a_clipped.y1);
uint32_t line_length = lv_area_get_width(&a_clipped) * px_size;
int32_t y;
for(y = a_clipped.y1; y <= a_clipped.y2; y++) {
lv_memzero(buf, line_length);
buf += stride;
}
}