| diff --git a/third_party/agg23/agg_rasterizer_scanline_aa.h b/third_party/agg23/agg_rasterizer_scanline_aa.h |
| index c747ee379..da166bb14 100644 |
| --- a/third_party/agg23/agg_rasterizer_scanline_aa.h |
| +++ b/third_party/agg23/agg_rasterizer_scanline_aa.h |
| @@ -349,14 +349,14 @@ public: |
| cover += cur_cell->cover; |
| } |
| if(area) { |
| - alpha = calculate_alpha((cover << (poly_base_shift + 1)) - area, no_smooth); |
| + alpha = calculate_alpha(calculate_area(cover, poly_base_shift + 1) - area, no_smooth); |
| if(alpha) { |
| sl.add_cell(x, alpha); |
| } |
| x++; |
| } |
| if(num_cells && cur_cell->x > x) { |
| - alpha = calculate_alpha(cover << (poly_base_shift + 1), no_smooth); |
| + alpha = calculate_alpha(calculate_area(cover, poly_base_shift + 1), no_smooth); |
| if(alpha) { |
| sl.add_span(x, cur_cell->x - x, alpha); |
| } |
| @@ -458,6 +458,11 @@ private: |
| m_prev_x = x; |
| m_prev_y = y; |
| } |
| + static int calculate_area(int cover, int shift) { |
| + unsigned int result = cover; |
| + result <<= shift; |
| + return result; |
| + } |
| private: |
| outline_aa m_outline; |
| filling_rule_e m_filling_rule; |
