fix depth clipping in perspective view

The depth range is now set slightly differently. Both ends of the range
are shifted for each layer to solve some precision issues.

Some layers draw multiple things at different depths. For example, fill
layers draw fills and antialiasing separately. To handle this case, I
added setDepthSublayer(n) which a

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mbgl/renderer/painter_raster.cpp b/src/mbgl/renderer/painter_raster.cpp
index 2a8f8e7078..70cbcb4ca5 100644
--- a/src/mbgl/renderer/painter_raster.cpp
+++ b/src/mbgl/renderer/painter_raster.cpp
@@ -24,7 +24,7 @@ void Painter::renderRaster(RasterBucket& bucket, const StyleLayer &layer_desc, c
 
         config.stencilTest = true;
         config.depthTest = true;
-        config.depthRange = { strata + strata_epsilon, 1.0f };
+        setDepthSublayer(0);
         bucket.drawRaster(*rasterShader, tileStencilBuffer, coveringRasterArray);
     }
 }