From b05e5ddd347a9362535ca33cefceae92c51c998f Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Thu, 7 Sep 2017 12:21:22 -0700
Subject: [core] Fix z-fighting of translucent fills

---
 src/mbgl/renderer/layers/render_fill_layer.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/mbgl/renderer/layers/render_fill_layer.cpp b/src/mbgl/renderer/layers/render_fill_layer.cpp
index 394642a50d..22cb9563c1 100644
--- a/src/mbgl/renderer/layers/render_fill_layer.cpp
+++ b/src/mbgl/renderer/layers/render_fill_layer.cpp
@@ -99,7 +99,9 @@ void RenderFillLayer::render(PaintParameters& parameters, RenderSource*) {
               && evaluated.get<FillOpacity>().constantOr(0) >= 1.0f) == (parameters.pass == RenderPass::Opaque)) {
                 draw(parameters.programs.fill,
                      gl::Triangles(),
-                     parameters.depthModeForSublayer(1, gl::DepthMode::ReadWrite),
+                     parameters.depthModeForSublayer(1, parameters.pass == RenderPass::Opaque
+                        ? gl::DepthMode::ReadWrite
+                        : gl::DepthMode::ReadOnly),
                      *bucket.triangleIndexBuffer,
                      bucket.triangleSegments);
             }
-- 
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