diff options
Diffstat (limited to 'src/mbgl/util/tile_cover.cpp')
| -rw-r--r-- | src/mbgl/util/tile_cover.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mbgl/util/tile_cover.cpp b/src/mbgl/util/tile_cover.cpp index 00a261e083..dacd289d3a 100644 --- a/src/mbgl/util/tile_cover.cpp +++ b/src/mbgl/util/tile_cover.cpp @@ -4,6 +4,7 @@ #include <mbgl/map/transform_state.hpp> #include <mbgl/util/tile_cover_impl.hpp> #include <mbgl/util/tile_coordinate.hpp> +#include <mbgl/math/compare.hpp> #include <functional> #include <list> @@ -34,7 +35,8 @@ struct edge { // scan-line conversion static void scanSpans(edge e0, edge e1, int32_t ymin, int32_t ymax, ScanLine scanLine) { - double y0 = util::max(double(ymin), std::floor(e1.y0)); + bool fuzzyIsNull = util::fuzzyIsNull(e1.y0); + double y0 = util::max(double(ymin), fuzzyIsNull ? 0.0 : std::floor(e1.y0)); double y1 = util::min(double(ymax), std::ceil(e1.y1)); // sort edges by x-coordinate @@ -52,7 +54,8 @@ static void scanSpans(edge e0, edge e1, int32_t ymin, int32_t ymax, ScanLine sca for (int32_t y = y0; y < y1; y++) { double x0 = m0 * util::max(0.0, util::min(e0.dy, y + d0 - e0.y0)) + e0.x0; double x1 = m1 * util::max(0.0, util::min(e1.dy, y + d1 - e1.y0)) + e1.x0; - scanLine(std::floor(x1), std::ceil(x0), y); + fuzzyIsNull = util::fuzzyIsNull(x1); + scanLine(fuzzyIsNull ? 0.0 : std::floor(x1), std::ceil(x0), y); } } |