Round texture size to pow2

Author: dy

index.js

@@ -16,7 +16,7 @@ let kerning = require('detect-kerning')
 let extend = require('object-assign')
 let metrics = require('font-measure')
 let flatten = require('flatten-vertex-data')
-
+let { nextPow2 } = require('bit-twiddle')
 
 let shaderCache = new WeakMap
 
@@ -596,9 +596,9 @@ class GlText {
 					let cols = Math.min(maxCols, atlas.chars.length)
 					let rows = Math.ceil(atlas.chars.length / cols)
 
-					let atlasWidth = cols * step
+					let atlasWidth = nextPow2( cols * step )
 					// let atlasHeight = Math.min(rows * step + step * .5, GlText.maxAtlasSize);
-					let atlasHeight = rows * step;
+					let atlasHeight = nextPow2( rows * step );
 
 					atlas.width = atlasWidth
 					atlas.height = atlasHeight;

package.json

@@ -29,6 +29,7 @@
   },
   "homepage": "https://github.com/a-vis/gl-text#readme",
   "dependencies": {
+    "bit-twiddle": "^1.0.2",
     "color-normalize": "^1.1.0",
     "css-font": "^1.2.0",
     "detect-kerning": "^2.1.2",