chore(package): update eslint to version 6.7.2

Closes #307

package.json

@@ -30,9 +30,9 @@
     "babel-polyfill": "^6.22.0",
     "babel-preset-env": "^1.6.1",
     "chromeless": "^1.5.1",
-    "copy-webpack-plugin": "^5.1.1",
+    "copy-webpack-plugin": "^4.5.1",
     "docdash": "^0.4.0",
-    "eslint": "^4.6.1",
+    "eslint": "^6.7.2",
     "eslint-config-scratch": "^5.0.0",
     "gh-pages": "^1.0.0",
     "jsdoc": "^3.5.5",

src/RenderWebGL.js

@@ -1542,20 +1542,23 @@ class RenderWebGL extends EventEmitter {
         const skin = /** @type {PenSkin} */ this._allSkins[penSkinID];
 
         const gl = this._gl;
-        twgl.bindFramebufferInfo(gl, skin._framebuffer);
+        twgl.bindFramebufferInfo(gl, this._queryBufferInfo);
 
         // Limit size of viewport to the bounds around the stamp Drawable and create the projection matrix for the draw.
-        gl.viewport(
-            (this._nativeSize[0] * 0.5) + bounds.left,
-            (this._nativeSize[1] * 0.5) - bounds.top,
-            bounds.width,
-            bounds.height
-        );
+        gl.viewport(0, 0, bounds.width, bounds.height);
         const projection = twgl.m4.ortho(bounds.left, bounds.right, bounds.top, bounds.bottom, -1, 1);
 
-        // Draw the stamped sprite onto the PenSkin's framebuffer.
-        this._drawThese([stampID], ShaderManager.DRAW_MODE.stamp, projection, {ignoreVisibility: true});
-        skin._silhouetteDirty = true;
+        gl.clearColor(0, 0, 0, 0);
+        gl.clear(gl.COLOR_BUFFER_BIT);
+
+        try {
+            gl.disable(gl.BLEND);
+            this._drawThese([stampID], ShaderManager.DRAW_MODE.stamp, projection, {ignoreVisibility: true});
+        } finally {
+            gl.enable(gl.BLEND);
+        }
+
+        skin._drawToBuffer(this._queryBufferInfo.attachments[0], bounds.left, bounds.top);
     }
 
     /* ******