chore(package): update tap to version 14.6.0

Closes #289

package.json

@@ -38,7 +38,7 @@
     "jsdoc": "^3.5.5",
     "json": "^9.0.4",
     "scratch-vm": "0.2.0-prerelease.20190207224121",
-    "tap": "^11.0.0",
+    "tap": "^14.6.0",
     "travis-after-all": "^1.4.4",
     "uglifyjs-webpack-plugin": "^1.2.5",
     "webpack": "^4.8.0",
@@ -53,7 +53,7 @@
     "minilog": "3.1.0",
     "raw-loader": "^0.5.1",
     "scratch-storage": "^1.0.0",
-    "scratch-svg-renderer": "0.2.0-prerelease.20190822202608",
-    "twgl.js": "4.11.4"
+    "scratch-svg-renderer": "0.2.0-prerelease.20190715153806",
+    "twgl.js": "4.4.0"
   }
 }

src/BitmapSkin.js

@@ -23,6 +23,12 @@ class BitmapSkin extends Skin {
 
         /** @type {Array<int>} */
         this._textureSize = [0, 0];
+
+        /**
+         * The "native" size, in texels, of this skin.
+         * @type {Array<number>}
+         */
+        this.size = [0, 0];
     }
 
     /**
@@ -43,13 +49,6 @@ class BitmapSkin extends Skin {
         return true;
     }
 
-    /**
-     * @return {Array<number>} the "native" size, in texels, of this skin.
-     */
-    get size () {
-        return [this._textureSize[0] / this._costumeResolution, this._textureSize[1] / this._costumeResolution];
-    }
-
     /**
      * @param {Array<number>} scale - The scaling factors to be used.
      * @return {WebGLTexture} The GL texture representation of this skin when drawing at the given scale.
@@ -110,6 +109,7 @@ class BitmapSkin extends Skin {
         // Do these last in case any of the above throws an exception
         this._costumeResolution = costumeResolution || 2;
         this._textureSize = BitmapSkin._getBitmapSize(bitmapData);
+        this.size = [this._textureSize[0] / this._costumeResolution, this._textureSize[1] / this._costumeResolution];
 
         if (typeof rotationCenter === 'undefined') rotationCenter = this.calculateRotationCenter();
         this.setRotationCenter.apply(this, rotationCenter);

src/Drawable.js

@@ -3,7 +3,6 @@ const twgl = require('twgl.js');
 const Rectangle = require('./Rectangle');
 const RenderConstants = require('./RenderConstants');
 const ShaderManager = require('./ShaderManager');
-const Skin = require('./Skin');
 const EffectTransform = require('./EffectTransform');
 
 /**
@@ -101,8 +100,6 @@ class Drawable {
         /** @todo move convex hull functionality, maybe bounds functionality overall, to Skin classes */
         this._convexHullPoints = null;
         this._convexHullDirty = true;
-
-        this._skinWasAltered = this._skinWasAltered.bind(this);
     }
 
     /**
@@ -141,13 +138,7 @@ class Drawable {
      */
     set skin (newSkin) {
         if (this._skin !== newSkin) {
-            if (this._skin) {
-                this._skin.removeListener(Skin.Events.WasAltered, this._skinWasAltered);
-            }
             this._skin = newSkin;
-            if (this._skin) {
-                this._skin.addListener(Skin.Events.WasAltered, this._skinWasAltered);
-            }
             this._skinWasAltered();
         }
     }
@@ -183,99 +174,56 @@ class Drawable {
         return this._visible;
     }
 
-    /**
-     * Update the position if it is different. Marks the transform as dirty.
-     * @param {Array.<number>} position A new position.
-     */
-    updatePosition (position) {
-        if (this._position[0] !== position[0] ||
-            this._position[1] !== position[1]) {
-            this._position[0] = Math.round(position[0]);
-            this._position[1] = Math.round(position[1]);
-            this.setTransformDirty();
-        }
-    }
-
-    /**
-     * Update the direction if it is different. Marks the transform as dirty.
-     * @param {number} direction A new direction.
-     */
-    updateDirection (direction) {
-        if (this._direction !== direction) {
-            this._direction = direction;
-            this._rotationTransformDirty = true;
-            this.setTransformDirty();
-        }
-    }
-
-    /**
-     * Update the scale if it is different. Marks the transform as dirty.
-     * @param {Array.<number>} scale A new scale.
-     */
-    updateScale (scale) {
-        if (this._scale[0] !== scale[0] ||
-            this._scale[1] !== scale[1]) {
-            this._scale[0] = scale[0];
-            this._scale[1] = scale[1];
-            this._rotationCenterDirty = true;
-            this._skinScaleDirty = true;
-            this.setTransformDirty();
-        }
-    }
-
-    /**
-     * Update visibility if it is different. Marks the convex hull as dirty.
-     * @param {boolean} visible A new visibility state.
-     */
-    updateVisible (visible) {
-        if (this._visible !== visible) {
-            this._visible = visible;
-            this.setConvexHullDirty();
-        }
-    }
-
-    /**
-     * Update an effect. Marks the convex hull as dirty if the effect changes shape.
-     * @param {string} effectName The name of the effect.
-     * @param {number} rawValue A new effect value.
-     */
-    updateEffect (effectName, rawValue) {
-        const effectInfo = ShaderManager.EFFECT_INFO[effectName];
-        if (rawValue) {
-            this._effectBits |= effectInfo.mask;
-        } else {
-            this._effectBits &= ~effectInfo.mask;
-        }
-        const converter = effectInfo.converter;
-        this._uniforms[effectInfo.uniformName] = converter(rawValue);
-        if (effectInfo.shapeChanges) {
-            this.setConvexHullDirty();
-        }
-    }
-
     /**
      * Update the position, direction, scale, or effect properties of this Drawable.
-     * @deprecated Use specific update* methods instead.
      * @param {object.<string,*>} properties The new property values to set.
      */
     updateProperties (properties) {
-        if ('position' in properties) {
-            this.updatePosition(properties.position);
+        let dirty = false;
+        if ('position' in properties && (
+            this._position[0] !== properties.position[0] ||
+            this._position[1] !== properties.position[1])) {
+            this._position[0] = Math.round(properties.position[0]);
+            this._position[1] = Math.round(properties.position[1]);
+            dirty = true;
         }
-        if ('direction' in properties) {
-            this.updateDirection(properties.direction);
+        if ('direction' in properties && this._direction !== properties.direction) {
+            this._direction = properties.direction;
+            this._rotationTransformDirty = true;
+            dirty = true;
         }
-        if ('scale' in properties) {
-            this.updateScale(properties.scale);
+        if ('scale' in properties && (
+            this._scale[0] !== properties.scale[0] ||
+            this._scale[1] !== properties.scale[1])) {
+            this._scale[0] = properties.scale[0];
+            this._scale[1] = properties.scale[1];
+            this._rotationCenterDirty = true;
+            this._skinScaleDirty = true;
+            dirty = true;
         }
         if ('visible' in properties) {
-            this.updateVisible(properties.visible);
+            this._visible = properties.visible;
+            this.setConvexHullDirty();
+        }
+        if (dirty) {
+            this.setTransformDirty();
         }
         const numEffects = ShaderManager.EFFECTS.length;
         for (let index = 0; index < numEffects; ++index) {
             const effectName = ShaderManager.EFFECTS[index];
             if (effectName in properties) {
-                this.updateEffect(effectName, properties[effectName]);
+                const rawValue = properties[effectName];
+                const effectInfo = ShaderManager.EFFECT_INFO[effectName];
+                if (rawValue) {
+                    this._effectBits |= effectInfo.mask;
+                } else {
+                    this._effectBits &= ~effectInfo.mask;
+                }
+                const converter = effectInfo.converter;
+                this._uniforms[effectInfo.uniformName] = converter(rawValue);
+                if (effectInfo.shapeChanges) {
+                    this.setConvexHullDirty();
+                }
             }
         }
     }
@@ -476,16 +424,6 @@ class Drawable {
             return true;
         }
 
-        // If the effect bits for mosaic, pixelate, whirl, or fisheye are set, use linear
-        if ((this._effectBits & (
-            ShaderManager.EFFECT_INFO.fisheye.mask |
-            ShaderManager.EFFECT_INFO.whirl.mask |
-            ShaderManager.EFFECT_INFO.pixelate.mask |
-            ShaderManager.EFFECT_INFO.mosaic.mask
-        )) !== 0) {
-            return false;
-        }
-
         // We can't use nearest neighbor unless we are a multiple of 90 rotation
         if (this._direction % 90 !== 0) {
             return false;
@@ -573,6 +511,7 @@ class Drawable {
      * @return {!Rectangle} Bounds for the Drawable.
      */
     getFastBounds (result) {
+        this.updateMatrix();
         if (!this.needsConvexHullPoints()) {
             return this.getBounds(result);
         }

src/PenSkin.js

@@ -88,6 +88,9 @@ class PenSkin extends Skin {
         /** @type {HTMLCanvasElement} */
         this._canvas = document.createElement('canvas');
 
+        /** @type {Array<number>} */
+        this._canvasSize = twgl.v3.create();
+
         /** @type {WebGLTexture} */
         this._texture = null;
 
@@ -165,7 +168,7 @@ class PenSkin extends Skin {
      * @return {Array<number>} the "native" size, in texels, of this skin. [width, height]
      */
     get size () {
-        return [this._canvas.width, this._canvas.height];
+        return this._canvasSize;
     }
 
     /**
@@ -188,13 +191,13 @@ class PenSkin extends Skin {
     clear () {
         const gl = this._renderer.gl;
         twgl.bindFramebufferInfo(gl, this._framebuffer);
-        
+
         /* Reset framebuffer to transparent black */
         gl.clearColor(0, 0, 0, 0);
         gl.clear(gl.COLOR_BUFFER_BIT);
 
         const ctx = this._canvas.getContext('2d');
-        ctx.clearRect(0, 0, this._canvas.width, this._canvas.height);
+        ctx.clearRect(0, 0, this._canvasSize[0], this._canvasSize[1]);
 
         this._silhouetteDirty = true;
     }
@@ -332,7 +335,8 @@ class PenSkin extends Skin {
 
         const uniforms = {
             u_skin: this._texture,
-            u_projectionMatrix: projection
+            u_projectionMatrix: projection,
+            u_fudge: 0
         };
 
         twgl.setUniforms(currentShader, uniforms);
@@ -450,7 +454,7 @@ class PenSkin extends Skin {
      * @param {number} x - centered at x
      * @param {number} y - centered at y
      */
-    _drawRectangle (currentShader, texture, bounds, x = -this._canvas.width / 2, y = this._canvas.height / 2) {
+    _drawRectangle (currentShader, texture, bounds, x = -this._canvasSize[0] / 2, y = this._canvasSize[1] / 2) {
         const gl = this._renderer.gl;
 
         const projection = twgl.m4.ortho(
@@ -473,7 +477,8 @@ class PenSkin extends Skin {
                     0
                 ), __modelScalingMatrix),
                 __modelMatrix
-            )
+            ),
+            u_fudge: 0
         };
 
         twgl.setTextureParameters(gl, texture, {minMag: gl.NEAREST});
@@ -512,7 +517,7 @@ class PenSkin extends Skin {
      * @param {number} x - texture centered at x
      * @param {number} y - texture centered at y
      */
-    _drawToBuffer (texture = this._texture, x = -this._canvas.width / 2, y = this._canvas.height / 2) {
+    _drawToBuffer (texture = this._texture, x = -this._canvasSize[0] / 2, y = this._canvasSize[1] / 2) {
         if (texture !== this._texture && this._canvasDirty) {
             this._drawToBuffer();
         }
@@ -526,7 +531,7 @@ class PenSkin extends Skin {
             gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, this._canvas);
 
             const ctx = this._canvas.getContext('2d');
-            ctx.clearRect(0, 0, this._canvas.width, this._canvas.height);
+            ctx.clearRect(0, 0, this._canvasSize[0], this._canvasSize[1]);
 
             this._canvasDirty = false;
         }
@@ -562,8 +567,8 @@ class PenSkin extends Skin {
         this._bounds = new Rectangle();
         this._bounds.initFromBounds(width / 2, width / -2, height / 2, height / -2);
 
-        this._canvas.width = width;
-        this._canvas.height = height;
+        this._canvas.width = this._canvasSize[0] = width;
+        this._canvas.height = this._canvasSize[1] = height;
         this._rotationCenter[0] = width / 2;
         this._rotationCenter[1] = height / 2;
 
@@ -649,8 +654,8 @@ class PenSkin extends Skin {
             this._renderer.enterDrawRegion(this._toBufferDrawRegionId);
 
             // Sample the framebuffer's pixels into the silhouette instance
-            const skinPixels = new Uint8Array(Math.floor(this._canvas.width * this._canvas.height * 4));
-            gl.readPixels(0, 0, this._canvas.width, this._canvas.height, gl.RGBA, gl.UNSIGNED_BYTE, skinPixels);
+            const skinPixels = new Uint8Array(Math.floor(this._canvasSize[0] * this._canvasSize[1] * 4));
+            gl.readPixels(0, 0, this._canvasSize[0], this._canvasSize[1], gl.RGBA, gl.UNSIGNED_BYTE, skinPixels);
 
             const skinCanvas = this._canvas;
             skinCanvas.width = bounds.width;

src/Rectangle.js

@@ -123,11 +123,11 @@ class Rectangle {
         this.right = Math.min(this.right, right);
         this.bottom = Math.max(this.bottom, bottom);
         this.top = Math.min(this.top, top);
-        
-        this.left = Math.min(this.left, right);
-        this.right = Math.max(this.right, left);
-        this.bottom = Math.min(this.bottom, top);
-        this.top = Math.max(this.top, bottom);
+        // Ensure rectangle coordinates in order.
+        this.left = Math.min(this.left, this.right);
+        this.right = Math.max(this.right, this.left);
+        this.bottom = Math.min(this.bottom, this.top);
+        this.top = Math.max(this.top, this.bottom);
     }
 
     /**

src/RenderWebGL.js

@@ -3,6 +3,7 @@ const EventEmitter = require('events');
 const hull = require('hull.js');
 const twgl = require('twgl.js');
 
+const Skin = require('./Skin');
 const BitmapSkin = require('./BitmapSkin');
 const Drawable = require('./Drawable');
 const Rectangle = require('./Rectangle');
@@ -105,7 +106,7 @@ class RenderWebGL extends EventEmitter {
      * @private
      */
     static _getContext (canvas) {
-        return twgl.getWebGLContext(canvas, {alpha: false, stencil: true, antialias: false});
+        return twgl.getWebGLContext(canvas, {alpha: false, stencil: true});
     }
 
     /**
@@ -291,6 +292,20 @@ class RenderWebGL extends EventEmitter {
         this.emit(RenderConstants.Events.NativeSizeChanged, {newSize: this._nativeSize});
     }
 
+    /**
+     * Notify Drawables whose skin is the skin that changed.
+     * @param {Skin} skin - the skin that changed.
+     * @private
+     */
+    _skinWasAltered (skin) {
+        for (let i = 0; i < this._allDrawables.length; i++) {
+            const drawable = this._allDrawables[i];
+            if (drawable && drawable._skin === skin) {
+                drawable._skinWasAltered();
+            }
+        }
+    }
+
     /**
      * Create a new bitmap skin from a snapshot of the provided bitmap data.
      * @param {ImageData|HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} bitmapData - new contents for this skin.
@@ -303,6 +318,7 @@ class RenderWebGL extends EventEmitter {
         const skinId = this._nextSkinId++;
         const newSkin = new BitmapSkin(skinId, this);
         newSkin.setBitmap(bitmapData, costumeResolution, rotationCenter);
+        newSkin.addListener(Skin.Events.WasAltered, this._skinWasAltered.bind(this, newSkin));
         this._allSkins[skinId] = newSkin;
         return skinId;
     }
@@ -318,6 +334,7 @@ class RenderWebGL extends EventEmitter {
         const skinId = this._nextSkinId++;
         const newSkin = new SVGSkin(skinId, this);
         newSkin.setSVG(svgData, rotationCenter);
+        newSkin.addListener(Skin.Events.WasAltered, this._skinWasAltered.bind(this, newSkin));
         this._allSkins[skinId] = newSkin;
         return skinId;
     }
@@ -329,6 +346,7 @@ class RenderWebGL extends EventEmitter {
     createPenSkin () {
         const skinId = this._nextSkinId++;
         const newSkin = new PenSkin(skinId, this);
+        newSkin.addListener(Skin.Events.WasAltered, this._skinWasAltered.bind(this, newSkin));
         this._allSkins[skinId] = newSkin;
         return skinId;
     }
@@ -345,6 +363,7 @@ class RenderWebGL extends EventEmitter {
         const skinId = this._nextSkinId++;
         const newSkin = new TextBubbleSkin(skinId, this);
         newSkin.setTextBubble(type, text, pointsLeft);
+        newSkin.addListener(Skin.Events.WasAltered, this._skinWasAltered.bind(this, newSkin));
         this._allSkins[skinId] = newSkin;
         return skinId;
     }
@@ -1314,122 +1333,9 @@ class RenderWebGL extends EventEmitter {
         }, null);
     }
 
-    /**
-     * Update a drawable's skin.
-     * @param {number} drawableID The drawable's id.
-     * @param {number} skinId The skin to update to.
-     */
-    updateDrawableSkinId (drawableID, skinId) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.skin = this._allSkins[skinId];
-    }
-
-    /**
-     * Update a drawable's skin rotation center.
-     * @param {number} drawableID The drawable's id.
-     * @param {Array.<number>} rotationCenter The rotation center for the skin.
-     */
-    updateDrawableRotationCenter (drawableID, rotationCenter) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.skin.setRotationCenter(rotationCenter[0], rotationCenter[1]);
-    }
-
-    /**
-     * Update a drawable's skin and rotation center together.
-     * @param {number} drawableID The drawable's id.
-     * @param {number} skinId The skin to update to.
-     * @param {Array.<number>} rotationCenter The rotation center for the skin.
-     */
-    updateDrawableSkinIdRotationCenter (drawableID, skinId, rotationCenter) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.skin = this._allSkins[skinId];
-        drawable.skin.setRotationCenter(rotationCenter[0], rotationCenter[1]);
-    }
-
-    /**
-     * Update a drawable's position.
-     * @param {number} drawableID The drawable's id.
-     * @param {Array.<number>} position The new position.
-     */
-    updateDrawablePosition (drawableID, position) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.updatePosition(position);
-    }
-
-    /**
-     * Update a drawable's direction.
-     * @param {number} drawableID The drawable's id.
-     * @param {number} direction A new direction.
-     */
-    updateDrawableDirection (drawableID, direction) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.updateDirection(direction);
-    }
-
-    /**
-     * Update a drawable's scale.
-     * @param {number} drawableID The drawable's id.
-     * @param {Array.<number>} scale A new scale.
-     */
-    updateDrawableScale (drawableID, scale) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.updateScale(scale);
-    }
-
-    /**
-     * Update a drawable's direction and scale together.
-     * @param {number} drawableID The drawable's id.
-     * @param {number} direction A new direction.
-     * @param {Array.<number>} scale A new scale.
-     */
-    updateDrawableDirectionScale (drawableID, direction, scale) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.updateDirection(direction);
-        drawable.updateScale(scale);
-    }
-
-    /**
-     * Update a drawable's visibility.
-     * @param {number} drawableID The drawable's id.
-     * @param {boolean} visible Will the drawable be visible?
-     */
-    updateDrawableVisible (drawableID, visible) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.updateVisible(visible);
-    }
-
-    /**
-     * Update a drawable's visual effect.
-     * @param {number} drawableID The drawable's id.
-     * @param {string} effectName The effect to change.
-     * @param {number} value A new effect value.
-     */
-    updateDrawableEffect (drawableID, effectName, value) {
-        const drawable = this._allDrawables[drawableID];
-        // TODO: https://github.com/LLK/scratch-vm/issues/2288
-        if (!drawable) return;
-        drawable.updateEffect(effectName, value);
-    }
 
     /**
      * Update the position, direction, scale, or effect properties of this Drawable.
-     * @deprecated Use specific updateDrawable* methods instead.
      * @param {int} drawableID The ID of the Drawable to update.
      * @param {object.<string,*>} properties The new property values to set.
      */
@@ -1437,16 +1343,17 @@ class RenderWebGL extends EventEmitter {
         const drawable = this._allDrawables[drawableID];
         if (!drawable) {
             /**
-             * @todo(https://github.com/LLK/scratch-vm/issues/2288) fix whatever's wrong in the VM which causes this, then add a warning or throw here.
+             * @todo fix whatever's wrong in the VM which causes this, then add a warning or throw here.
              * Right now this happens so much on some projects that a warning or exception here can hang the browser.
              */
             return;
         }
         if ('skinId' in properties) {
-            this.updateDrawableSkinId(drawableID, properties.skinId);
+            drawable.skin = this._allSkins[properties.skinId];
         }
         if ('rotationCenter' in properties) {
-            this.updateDrawableRotationCenter(drawableID, properties.rotationCenter);
+            const newRotationCenter = properties.rotationCenter;
+            drawable.skin.setRotationCenter(newRotationCenter[0], newRotationCenter[1]);
         }
         drawable.updateProperties(properties);
     }
@@ -1463,7 +1370,7 @@ class RenderWebGL extends EventEmitter {
 
         const drawable = this._allDrawables[drawableID];
         if (!drawable) {
-            // @todo(https://github.com/LLK/scratch-vm/issues/2288) fix whatever's wrong in the VM which causes this, then add a warning or throw here.
+            // TODO: fix whatever's wrong in the VM which causes this, then add a warning or throw here.
             // Right now this happens so much on some projects that a warning or exception here can hang the browser.
             return [x, y];
         }
@@ -1529,6 +1436,8 @@ class RenderWebGL extends EventEmitter {
      * @param {int} stampID - the unique ID of the Drawable to use as the stamp.
      */
     penStamp (penSkinID, stampID) {
+        this._doExitDrawRegion();
+
         const stampDrawable = this._allDrawables[stampID];
         if (!stampDrawable) {
             return;
@@ -1539,8 +1448,6 @@ class RenderWebGL extends EventEmitter {
             return;
         }
 
-        this._doExitDrawRegion();
-
         const skin = /** @type {PenSkin} */ this._allSkins[penSkinID];
 
         const gl = this._gl;
@@ -1661,7 +1568,6 @@ class RenderWebGL extends EventEmitter {
             this._exitRegion();
         }
         this._exitRegion = null;
-        this._regionId = null;
     }
 
     /**
@@ -1720,7 +1626,8 @@ class RenderWebGL extends EventEmitter {
                 gl.useProgram(currentShader.program);
                 twgl.setBuffersAndAttributes(gl, currentShader, this._bufferInfo);
                 Object.assign(uniforms, {
-                    u_projectionMatrix: projection
+                    u_projectionMatrix: projection,
+                    u_fudge: window.fudge || 0
                 });
             }
 

src/SVGSkin.js

@@ -30,6 +30,24 @@ class SVGSkin extends Skin {
 
         /** @type {Number} */
         this._maxTextureScale = 0;
+
+        /**
+         * The natural size, in Scratch units, of this skin.
+         * @type {Array<number>}
+         */
+        this.size = [0, 0];
+
+        /**
+         * The viewbox offset of the svg.
+         * @type {Array<number>}
+         */
+        this._viewOffset = [0, 0];
+
+        /**
+         * The rotation center before offset by _viewOffset.
+         * @type {Array<number>}
+         */
+        this._rawRotationCenter = [NaN, NaN];
     }
 
     /**
@@ -43,21 +61,17 @@ class SVGSkin extends Skin {
         super.dispose();
     }
 
-    /**
-     * @return {Array<number>} the natural size, in Scratch units, of this skin.
-     */
-    get size () {
-        return this._svgRenderer.size;
-    }
-
     /**
      * Set the origin, in object space, about which this Skin should rotate.
      * @param {number} x - The x coordinate of the new rotation center.
      * @param {number} y - The y coordinate of the new rotation center.
      */
     setRotationCenter (x, y) {
-        const viewOffset = this._svgRenderer.viewOffset;
-        super.setRotationCenter(x - viewOffset[0], y - viewOffset[1]);
+        if (x !== this._rawRotationCenter[0] || y !== this._rawRotationCenter[1]) {
+            this._rawRotationCenter[0] = x;
+            this._rawRotationCenter[1] = y;
+            super.setRotationCenter(x - this._viewOffset[0], y - this._viewOffset[1]);
+        }
     }
 
     /**
@@ -134,7 +148,11 @@ class SVGSkin extends Skin {
             }
 
             if (typeof rotationCenter === 'undefined') rotationCenter = this.calculateRotationCenter();
-            this.setRotationCenter.apply(this, rotationCenter);
+            this.size = this._svgRenderer.size;
+            this._viewOffset = this._svgRenderer.viewOffset;
+            // Reset rawRotationCenter when we update viewOffset.
+            this._rawRotationCenter = [NaN, NaN];
+            this.setRotationCenter(rotationCenter[0], rotationCenter[1]);
             this.emit(Skin.Events.WasAltered);
         });
     }

src/Skin.js

@@ -33,6 +33,13 @@ class Skin extends EventEmitter {
         /** @type {Vec3} */
         this._rotationCenter = twgl.v3.create(0, 0);
 
+        /**
+         * The "native" size, in texels, of this skin.
+         * @member size
+         * @abstract
+         * @type {Array<number>}
+         */
+
         /**
          * The uniforms to be used by the vertex and pixel shaders.
          * Some of these are used by other parts of the renderer as well.
@@ -97,14 +104,6 @@ class Skin extends EventEmitter {
         return this._rotationCenter;
     }
 
-    /**
-     * @abstract
-     * @return {Array<number>} the "native" size, in texels, of this skin.
-     */
-    get size () {
-        return [0, 0];
-    }
-
     /**
      * Set the origin, in object space, about which this Skin should rotate.
      * @param {number} x - The x coordinate of the new rotation center.

src/shaders/sprite.frag

@@ -1,5 +1,7 @@
 precision mediump float;
 
+uniform float u_fudge;
+
 #ifdef DRAW_MODE_silhouette
 uniform vec4 u_silhouetteColor;
 #else // DRAW_MODE_silhouette

test/fixtures/MockSkinPool.js

@@ -0,0 +1,35 @@
+const Skin = require('../../src/Skin');
+
+class MockSkinPool {
+    constructor () {
+        this._allDrawables = [];
+    }
+
+    static forDrawableSkin (drawable) {
+        const pool = new MockSkinPool();
+        pool.addDrawable(drawable);
+        pool.addSkin(drawable.skin);
+        return pool;
+    }
+
+    _skinWasAltered (skin) {
+        for (let i = 0; i < this._allDrawables.length; i++) {
+            const drawable = this._allDrawables[i];
+            if (drawable && drawable._skin === skin) {
+                drawable._skinWasAltered();
+            }
+        }
+    }
+
+    addDrawable (drawable) {
+        this._allDrawables.push(drawable);
+        return drawable;
+    }
+
+    addSkin (skin) {
+        skin.addListener(Skin.Events.WasAltered, this._skinWasAltered.bind(this, skin));
+        return skin;
+    }
+}
+
+module.exports = MockSkinPool;

test/integration/cpu-render.html

@@ -1,7 +1,6 @@
 <body>
     <script src="../../node_modules/scratch-vm/dist/web/scratch-vm.js"></script>
     <script src="../../node_modules/scratch-storage/dist/web/scratch-storage.js"></script>
-    <script src="../../node_modules/scratch-svg-renderer/dist/web/scratch-svg-renderer.js"></script>
     <!-- note: this uses the BUILT version of scratch-render!  make sure to npm run build -->
     <script src="../../dist/web/scratch-render.js"></script>
 
@@ -22,8 +21,6 @@
 
         vm.attachStorage(storage);
         vm.attachRenderer(render);
-        vm.attachV2SVGAdapter(new ScratchSVGRenderer.SVGRenderer());
-        vm.attachV2BitmapAdapter(new ScratchSVGRenderer.BitmapAdapter());
 
         document.getElementById('file').addEventListener('click', e => {
             document.body.removeChild(document.getElementById('loaded'));

test/unit/DrawableTests.js

@@ -8,6 +8,7 @@ global.document = {
 
 const Drawable = require('../../src/Drawable');
 const MockSkin = require('../fixtures/MockSkin');
+const MockSkinPool = require('../fixtures/MockSkinPool');
 const Rectangle = require('../../src/Rectangle');
 
 /**
@@ -31,6 +32,7 @@ test('translate by position', t => {
     const drawable = new Drawable();
     drawable.skin = new MockSkin();
     drawable.skin.size = [200, 50];
+    MockSkinPool.forDrawableSkin(drawable);
 
     expected.initFromBounds(0, 200, -50, 0);
     t.same(snapToNearest(drawable.getAABB()), expected);
@@ -47,6 +49,7 @@ test('translate by costume center', t => {
     const drawable = new Drawable();
     drawable.skin = new MockSkin();
     drawable.skin.size = [200, 50];
+    MockSkinPool.forDrawableSkin(drawable);
 
     drawable.skin.setRotationCenter(1, 0);
     expected.initFromBounds(-1, 199, -50, 0);
@@ -64,6 +67,7 @@ test('translate and rotate', t => {
     const drawable = new Drawable();
     drawable.skin = new MockSkin();
     drawable.skin.size = [200, 50];
+    MockSkinPool.forDrawableSkin(drawable);
 
     drawable.updateProperties({position: [1, 2], direction: 0});
     expected.initFromBounds(1, 51, 2, 202);
@@ -90,6 +94,7 @@ test('rotate by non-right-angles', t => {
     drawable.skin = new MockSkin();
     drawable.skin.size = [10, 10];
     drawable.skin.setRotationCenter(5, 5);
+    MockSkinPool.forDrawableSkin(drawable);
 
     expected.initFromBounds(-5, 5, -5, 5);
     t.same(snapToNearest(drawable.getAABB()), expected);
@@ -106,6 +111,7 @@ test('scale', t => {
     const drawable = new Drawable();
     drawable.skin = new MockSkin();
     drawable.skin.size = [200, 50];
+    MockSkinPool.forDrawableSkin(drawable);
 
     drawable.updateProperties({scale: [100, 50]});
     expected.initFromBounds(0, 200, -25, 0);
@@ -128,6 +134,7 @@ test('rotate and scale', t => {
     const drawable = new Drawable();
     drawable.skin = new MockSkin();
     drawable.skin.size = [100, 1000];
+    MockSkinPool.forDrawableSkin(drawable);
 
     drawable.skin.setRotationCenter(50, 50);
     expected.initFromBounds(-50, 50, -950, 50);