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| author | Chris Loer <chris.loer@gmail.com> | 2018-03-20 10:06:35 -0700 |
|---|---|---|
| committer | Chris Loer <chris.loer@mapbox.com> | 2018-03-21 13:26:30 -0700 |
| commit | 4dc191b8da139b19c5aa5a705169647786516a20 (patch) | |
| tree | bf3b7a8bcf1e12599ad1e3a0606609cb7707a8e8 /src/mbgl/shaders/symbol_sdf.cpp | |
| parent | d4f2bc07ca424fe6c4a596dac91ab247634e7aab (diff) | |
| download | qtlocation-mapboxgl-4dc191b8da139b19c5aa5a705169647786516a20.tar.gz | |
[core] Avoid flashing on pitched overzoomed tiles.
Clamps perspective ratios in shaders.
Fixes issue #11487.
Port of GL JS PR #6365.
Diffstat (limited to 'src/mbgl/shaders/symbol_sdf.cpp')
| -rw-r--r-- | src/mbgl/shaders/symbol_sdf.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mbgl/shaders/symbol_sdf.cpp b/src/mbgl/shaders/symbol_sdf.cpp index 441eaf7aac..46bab10be5 100644 --- a/src/mbgl/shaders/symbol_sdf.cpp +++ b/src/mbgl/shaders/symbol_sdf.cpp @@ -156,7 +156,10 @@ void main() { highp float distance_ratio = u_pitch_with_map ? camera_to_anchor_distance / u_camera_to_center_distance : u_camera_to_center_distance / camera_to_anchor_distance; - highp float perspective_ratio = 0.5 + 0.5 * distance_ratio; + highp float perspective_ratio = clamp( + 0.5 + 0.5 * distance_ratio, + 0.0, // Prevents oversized near-field symbols in pitched/overzoomed tiles + 4.0); size *= perspective_ratio; |