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fix(canvas): fix clipéping on transformation

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fixes: #3545
This commit is contained in:
Gabor Kiss-Vamosi
2022-08-07 21:09:43 +02:00
parent 4a7ddf9f19
commit 4519a874d7
3 changed files with 12 additions and 11 deletions
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15
src/widgets/canvas/lv_canvas.c
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@@ -180,10 +180,10 @@ void lv_canvas_transform(lv_obj_t * obj, lv_img_dsc_t * src_img, int16_t angle,
draw_dsc.antialias = antialias;
lv_area_t dest_area;
dest_area.x1 = 0;
dest_area.x2 = dest_img->header.w - 1;
dest_area.y1 = 0;
dest_area.y2 = 0;
dest_area.x1 = -offset_x;
dest_area.x2 = dest_area.x1 + dest_img->header.w - 1;
dest_area.y1 = -offset_y;
dest_area.y2 = -offset_y;
lv_color_t * cbuf = lv_malloc(dest_img->header.w * sizeof(lv_color_t));
lv_opa_t * abuf = lv_malloc(dest_img->header.w * sizeof(lv_opa_t));
@@ -193,15 +193,12 @@ void lv_canvas_transform(lv_obj_t * obj, lv_img_dsc_t * src_img, int16_t angle,
&draw_dsc, canvas->dsc.header.cf, cbuf, abuf);
for(x = 0; x < dest_img->header.w; x++) {
if(x + offset_x < 0) continue;
if(x + offset_x >= dest_img->header.w) break;
if(abuf[x]) {
lv_img_buf_set_px_color(dest_img, x + offset_x, y + offset_y, cbuf[x]);
lv_img_buf_set_px_alpha(dest_img, x + offset_x, y + offset_y, abuf[x]);
lv_img_buf_set_px_color(dest_img, x, y, cbuf[x]);
lv_img_buf_set_px_alpha(dest_img, x, y, abuf[x]);
}
}
if(y + offset_y >= dest_img->header.h) break;
dest_area.y1++;
dest_area.y2++;
}