From dce6e7657e7d756f92a22dcb65668a8cdb94231f Mon Sep 17 00:00:00 2001
From: Chris Loer <chris.loer@gmail.com>
Date: Wed, 12 Dec 2018 11:05:37 -0800
Subject: [PATCH] Cache hillshade textures based on texture size, not tile
 size. Fixes #7690 -- hillshade layers leak GPU memory.

---
 src/render/draw_hillshade.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/render/draw_hillshade.js b/src/render/draw_hillshade.js
index be2b12db161..5e9ebdc6127 100644
--- a/src/render/draw_hillshade.js
+++ b/src/render/draw_hillshade.js
@@ -75,6 +75,7 @@ function prepareHillshade(painter, tile, layer, sourceMaxZoom, depthMode, stenci
     // base 2 - 0000 0000, 0000 0001, 0000 0110, 1110 1100
     if (tile.dem && tile.dem.data) {
         const tileSize = tile.dem.dim;
+        const textureStride = tile.dem.stride;
 
         const pixelData = tile.dem.getPixels();
         context.activeTexture.set(gl.TEXTURE1);
@@ -83,7 +84,7 @@ function prepareHillshade(painter, tile, layer, sourceMaxZoom, depthMode, stenci
         // tiles will appear blank, because as you can see above the alpha value for these textures
         // is always 0
         context.pixelStoreUnpackPremultiplyAlpha.set(false);
-        tile.demTexture = tile.demTexture || painter.getTileTexture(tile.tileSize);
+        tile.demTexture = tile.demTexture || painter.getTileTexture(textureStride);
         if (tile.demTexture) {
             const demTexture = tile.demTexture;
             demTexture.update(pixelData, { premultiply: false });