Merge pull request #11037 from mike-000/patch-11

Allow icon and text styles to be scaled in two dimensions

examples/icon-scale.html

@@ -0,0 +1,16 @@
+---
+layout: example.html
+title: Icon Scale
+shortdesc: Example of scaling icons and labels.
+docs: >
+  Icons and labels can be scaled in both dimensions if required. A negative value will flip the image 
+  or text around its anchor point (reversed text is <b>not</b> suitable for line placement). A newline
+  character inserted in label text is interpreted in a <b>vector layer</b>, but will not be shown in
+  a <b>vector context</b>.
+tags: "vector, style, icon, label, scale"
+resources:
+  - https://code.jquery.com/jquery-2.2.3.min.js
+  - https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css
+  - https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js
+---
+<div id="map" class="map"><div id="popup"></div></div>

examples/icon-scale.js

@@ -0,0 +1,133 @@
+import Feature from '../src/ol/Feature.js';
+import Map from '../src/ol/Map.js';
+import Overlay from '../src/ol/Overlay.js';
+import Point from '../src/ol/geom/Point.js';
+import TileJSON from '../src/ol/source/TileJSON.js';
+import VectorSource from '../src/ol/source/Vector.js';
+import View from '../src/ol/View.js';
+import {Icon, Style, Text} from '../src/ol/style.js';
+import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
+import {fromLonLat} from '../src/ol/proj.js';
+import {getVectorContext} from '../src/ol/render.js';
+
+const rasterLayer = new TileLayer({
+  source: new TileJSON({
+    url: 'https://a.tiles.mapbox.com/v3/aj.1x1-degrees.json',
+    crossOrigin: '',
+  }),
+});
+
+const iconFeature = new Feature({
+  geometry: new Point(fromLonLat([0, -10])),
+  name: 'Fish.1',
+});
+
+const feature1 = new Feature({
+  geometry: new Point(fromLonLat([0, -10])),
+  name: 'Fish.1 Island',
+});
+
+const feature2 = new Feature({
+  geometry: new Point(fromLonLat([-30, 10])),
+  name: 'Fish.2 Island',
+});
+
+const iconStyle = new Style({
+  image: new Icon({
+    anchor: [0.5, 0.9],
+    src: 'data/fish.png',
+    crossOrigin: '',
+    scale: [0, 0],
+    rotation: Math.PI / 4,
+  }),
+  text: new Text({
+    text: 'FISH\nTEXT',
+    scale: [0, 0],
+    rotation: Math.PI / 4,
+    textAlign: 'center',
+    textBaseline: 'top',
+  }),
+});
+
+let i = 0;
+let j = 45;
+
+iconFeature.setStyle(function () {
+  const x = Math.sin((i * Math.PI) / 180) * 3;
+  const y = Math.sin((j * Math.PI) / 180) * 4;
+  iconStyle.getImage().setScale([x, y]);
+  iconStyle.getText().setScale([x, y]);
+  return iconStyle;
+});
+
+rasterLayer.on('postrender', function (event) {
+  const vectorContext = getVectorContext(event);
+  const x = Math.cos((i * Math.PI) / 180) * 3;
+  const y = Math.cos((j * Math.PI) / 180) * 4;
+  iconStyle.getImage().setScale([x, y]);
+  iconStyle.getText().setScale([x, y]);
+  vectorContext.drawFeature(feature2, iconStyle);
+});
+
+const vectorSource = new VectorSource({
+  features: [iconFeature, feature1, feature2],
+});
+
+const vectorLayer = new VectorLayer({
+  source: vectorSource,
+});
+
+const map = new Map({
+  layers: [rasterLayer, vectorLayer],
+  target: document.getElementById('map'),
+  view: new View({
+    center: fromLonLat([-15, 0]),
+    zoom: 3,
+  }),
+});
+
+setInterval(function () {
+  i = (i + 4) % 360;
+  j = (j + 5) % 360;
+  vectorSource.changed();
+}, 1000);
+
+const element = document.getElementById('popup');
+
+const popup = new Overlay({
+  element: element,
+  positioning: 'bottom-center',
+  stopEvent: false,
+  offset: [0, -50],
+});
+map.addOverlay(popup);
+
+// display popup on click
+map.on('click', function (evt) {
+  const feature = map.forEachFeatureAtPixel(evt.pixel, function (feature) {
+    return feature;
+  });
+  $(element).popover('destroy');
+  if (feature) {
+    const coordinates = feature.getGeometry().getCoordinates();
+    popup.setPosition(coordinates);
+    $(element).popover({
+      placement: 'top',
+      html: true,
+      animation: false,
+      content: feature.get('name'),
+    });
+    $(element).popover('show');
+  }
+});
+
+// change mouse cursor when over marker
+map.on('pointermove', function (e) {
+  if (e.dragging) {
+    $(element).popover('destroy');
+    return;
+  }
+  const pixel = map.getEventPixel(e.originalEvent);
+  const hit = map.hasFeatureAtPixel(pixel);
+  map.getTarget().style.cursor = hit ? 'pointer' : '';
+});

rendering/cases/icon-scale/main.js

@@ -0,0 +1,117 @@
+import Feature from '../../../src/ol/Feature.js';
+import Icon from '../../../src/ol/style/Icon.js';
+import Map from '../../../src/ol/Map.js';
+import Point from '../../../src/ol/geom/Point.js';
+import Style from '../../../src/ol/style/Style.js';
+import VectorLayer from '../../../src/ol/layer/Vector.js';
+import VectorSource from '../../../src/ol/source/Vector.js';
+import View from '../../../src/ol/View.js';
+
+const features = [];
+for (let i = 0; i < 2; ++i) {
+  const x = i * 5;
+  features.push(
+    new Feature({
+      geometry: new Point([x + 2, 2]),
+      scale: [1.5, 1],
+      anchor: [1, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 3, 2]),
+      scale: [1.5, 1],
+      anchor: [0.5, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 4, 2]),
+      scale: [1.5, 1],
+      anchor: [0, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 2, 4]),
+      scale: [-1, 1],
+      anchor: [0, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 3, 4]),
+      scale: [-1, 1],
+      anchor: [0.5, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 4, 4]),
+      scale: [-1, 1],
+      anchor: [1, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 2, 6]),
+      scale: [1, -1],
+      anchor: [0.5, 1],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 3, 6]),
+      scale: [1, -1],
+      anchor: [0.5, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 4, 6]),
+      scale: [1, -1],
+      anchor: [0.5, 0],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 2, 8]),
+      scale: [1, 1.5],
+      anchor: [0.5, 0],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 3, 8]),
+      scale: [1, 1.5],
+      anchor: [0.5, 0.5],
+      rotated: i,
+    }),
+    new Feature({
+      geometry: new Point([x + 4, 8]),
+      scale: [1, 1.5],
+      anchor: [0.5, 1],
+      rotated: i,
+    })
+  );
+}
+
+const vectorSource = new VectorSource({
+  features: features,
+});
+
+const style = new Style({
+  image: new Icon({
+    src: '/data/fish.png',
+  }),
+});
+
+const vectorLayer = new VectorLayer({
+  source: vectorSource,
+  style: function (feature) {
+    style.getImage().setScale(feature.get('scale'));
+    style.getImage().setAnchor(feature.get('anchor'));
+    style.getImage().setRotation((feature.get('rotated') * Math.PI) / 4);
+    return style;
+  },
+});
+
+const map = new Map({
+  pixelRatio: 1,
+  layers: [vectorLayer],
+  target: 'map',
+  view: new View(),
+});
+map.getView().fit([0, 0, 11, 11]);
+
+render();

rendering/cases/text-style-linestring-nice/main.js

@@ -59,7 +59,7 @@ feature1.setStyle(
 vectorSource.addFeature(feature1);
 
 const lineString2 = lineString1.clone();
-lineString2.translate(0, 30);
+lineString2.translate(0, 20);
 const feature2 = new Feature({geometry: lineString2});
 feature2.setStyle(
   new Style({
@@ -123,7 +123,7 @@ feature4.setStyle(
 vectorSource.addFeature(feature4);
 
 const lineString5 = lineString4.clone();
-lineString5.translate(0, 30);
+lineString5.translate(0, 20);
 const feature5 = new Feature({geometry: lineString5});
 feature5.setStyle(
   new Style({
@@ -141,7 +141,7 @@ feature5.setStyle(
 vectorSource.addFeature(feature5);
 
 const lineString6 = lineString5.clone();
-lineString6.translate(0, 30);
+lineString6.translate(0, 20);
 const feature6 = new Feature({geometry: lineString6});
 feature6.setStyle(
   new Style({
@@ -160,6 +160,28 @@ feature6.setStyle(
 );
 vectorSource.addFeature(feature6);
 
+const lineString7 = lineString6.clone();
+lineString7.translate(0, 30);
+const feature7 = new Feature({geometry: lineString7});
+feature7.setStyle(
+  new Style({
+    stroke: new Stroke({color: 'blue'}),
+    text: new Text({
+      text: 'Reflection',
+      font: 'normal 400 12px/1 Ubuntu',
+      scale: [2, -1],
+      textBaseline: 'bottom',
+      textAlign: 'right',
+      placement: 'line',
+      stroke: new Stroke({
+        color: '#FFFF00',
+        width: 1,
+      }),
+    }),
+  })
+);
+vectorSource.addFeature(feature7);
+
 const map = new Map({
   pixelRatio: 1,
   layers: [

rendering/cases/text-style/main.js

@@ -110,15 +110,23 @@ feature.setStyle(
 );
 vectorSource.addFeature(feature);
 
-// background and padding
+// two dimensional scale
 feature = new Feature({
-  geometry: new Point([-10, 0]),
+  geometry: new Point([100, 20]),
 });
 feature.setStyle(
   new Style({
     text: new Text({
-      text: 'hello',
+      text: 'mirror',
       font: '12px Ubuntu',
+      scale: [-1, 2],
+      rotateWithView: true,
+      fill: new Fill({
+        color: 'red',
+      }),
+      stroke: new Stroke({
+        color: '#000',
+      }),
       padding: [1, 2, 3, 5],
       backgroundFill: new Fill({
         color: 'rgba(55, 55, 55, 0.25)',

src/ol/format/KML.js

@@ -915,11 +915,11 @@ function createNameStyleFunction(foundStyle, name) {
       imageSize = DEFAULT_IMAGE_STYLE_SIZE;
     }
     if (imageSize.length == 2) {
-      const imageScale = imageStyle.getScale();
+      const imageScale = imageStyle.getScaleArray();
       // Offset the label to be centered to the right of the icon,
       // if there is one.
-      textOffset[0] = (imageScale * imageSize[0]) / 2;
-      textOffset[1] = (-imageScale * imageSize[1]) / 2;
+      textOffset[0] = (imageScale[0] * imageSize[0]) / 2;
+      textOffset[1] = (-imageScale[1] * imageSize[1]) / 2;
       textAlign = 'left';
     }
   }

src/ol/render/canvas.js

@@ -63,7 +63,7 @@ import {toString} from '../transform.js';
  * @property {boolean} [overflow]
  * @property {import("../style/Fill.js").default} [backgroundFill]
  * @property {import("../style/Stroke.js").default} [backgroundStroke]
- * @property {number} [scale]
+ * @property {import("../size.js").Size} [scale]
  * @property {Array<number>} [padding]
  */
 
@@ -410,7 +410,7 @@ export function rotateAtOffset(context, rotation, offsetX, offsetY) {
  * @param {number} h Height.
  * @param {number} x X.
  * @param {number} y Y.
- * @param {number} scale Scale.
+ * @param {import("../size.js").Size} scale Scale.
  */
 export function drawImageOrLabel(
   context,
@@ -437,10 +437,25 @@ export function drawImageOrLabel(
   if (/** @type {*} */ (labelOrImage).contextInstructions) {
     // label
     context.translate(x, y);
-    context.scale(scale, scale);
+    context.scale(scale[0], scale[1]);
     executeLabelInstructions(/** @type {Label} */ (labelOrImage), context);
+  } else if (scale[0] < 0 || scale[1] < 0) {
+    // flipped image
+    context.translate(x, y);
+    context.scale(scale[0], scale[1]);
+    context.drawImage(
+      /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (labelOrImage),
+      originX,
+      originY,
+      w,
+      h,
+      0,
+      0,
+      w,
+      h
+    );
   } else {
-    // image
+    // if image not flipped translate and scale can be avoided
     context.drawImage(
       /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (labelOrImage),
       originX,
@@ -449,8 +464,8 @@ export function drawImageOrLabel(
       h,
       x,
       y,
-      w * scale,
-      h * scale
+      w * scale[0],
+      h * scale[1]
     );
   }
 

src/ol/render/canvas/Executor.js

@@ -194,7 +194,10 @@ class Executor {
     const fillState = fillKey ? this.fillStates[fillKey] : null;
     const textState = this.textStates[textKey];
     const pixelRatio = this.pixelRatio;
-    const scale = textState.scale * pixelRatio;
+    const scale = [
+      textState.scale[0] * pixelRatio,
+      textState.scale[1] * pixelRatio,
+    ];
     const align = TEXT_ALIGN[textState.textAlign || defaultTextAlign];
     const strokeWidth =
       strokeKey && strokeState.lineWidth ? strokeState.lineWidth : 0;
@@ -207,15 +210,17 @@ class Executor {
     const height = lineHeight * numLines;
     const renderWidth = width + strokeWidth;
     const contextInstructions = [];
+    // make canvas 2 pixels wider to account for italic text width measurement errors
+    const w = (renderWidth + 2) * scale[0];
+    const h = (height + strokeWidth) * scale[1];
     /** @type {import("../canvas.js").Label} */
     const label = {
-      // make canvas 2 pixels wider to account for italic text width measurement errors
-      width: Math.ceil((renderWidth + 2) * scale),
-      height: Math.ceil((height + strokeWidth) * scale),
+      width: w < 0 ? Math.floor(w) : Math.ceil(w),
+      height: h < 0 ? Math.floor(h) : Math.ceil(h),
       contextInstructions: contextInstructions,
     };
-    if (scale != 1) {
-      contextInstructions.push('scale', [scale, scale]);
+    if (scale[0] != 1 || scale[1] != 1) {
+      contextInstructions.push('scale', scale);
     }
     contextInstructions.push('font', textState.font);
     if (strokeKey) {
@@ -317,7 +322,7 @@ class Executor {
    * @param {number} originX Origin X.
    * @param {number} originY Origin Y.
    * @param {number} rotation Rotation.
-   * @param {number} scale Scale.
+   * @param {import("../../size.js").Size} scale Scale.
    * @param {boolean} snapToPixel Snap to pixel.
    * @param {number} width Width.
    * @param {Array<number>} padding Padding.
@@ -347,8 +352,8 @@ class Executor {
     strokeInstruction
   ) {
     const fillStroke = fillInstruction || strokeInstruction;
-    anchorX *= scale;
-    anchorY *= scale;
+    anchorX *= scale[0];
+    anchorY *= scale[1];
     x -= anchorX;
     y -= anchorY;
 
@@ -360,8 +365,8 @@ class Executor {
       height + originY > imageOrLabel.height
         ? imageOrLabel.height - originY
         : height;
-    const boxW = padding[3] + w * scale + padding[1];
-    const boxH = padding[0] + h * scale + padding[2];
+    const boxW = padding[3] + w * scale[0] + padding[1];
+    const boxH = padding[0] + h * scale[1] + padding[2];
     const boxX = x - padding[3];
     const boxY = y - padding[0];
 
@@ -415,7 +420,7 @@ class Executor {
     );
     const canvas = context.canvas;
     const strokePadding = strokeInstruction
-      ? (strokeInstruction[2] * scale) / 2
+      ? (strokeInstruction[2] * scale[0]) / 2
       : 0;
     const renderBuffer = this.renderBuffer_;
     const intersects =
@@ -612,7 +617,7 @@ class Executor {
       strokeState && strokeState.lineWidth ? strokeState.lineWidth : 0;
 
     // Remove the 2 pixels we added in createLabel() for the anchor
-    const width = label.width / pixelRatio - 2 * textState.scale;
+    const width = label.width / pixelRatio - 2 * textState.scale[0];
     const anchorX = align * width + 2 * (0.5 - align) * strokeWidth;
     const anchorY =
       (baseline * label.height) / pixelRatio +
@@ -791,7 +796,7 @@ class Executor {
           const originY = /** @type {number} */ (instruction[10]);
           const rotateWithView = /** @type {boolean} */ (instruction[11]);
           let rotation = /** @type {number} */ (instruction[12]);
-          const scale = /** @type {number} */ (instruction[13]);
+          const scale = /** @type {import("../../size.js").Size} */ (instruction[13]);
           let width = /** @type {number} */ (instruction[14]);
 
           if (!image && instruction.length >= 19) {
@@ -914,11 +919,17 @@ class Executor {
           const strokeWidth = /** @type {number} */ (instruction[11]);
           text = /** @type {string} */ (instruction[12]);
           textKey = /** @type {string} */ (instruction[13]);
-          const pixelRatioScale = /** @type {number} */ (instruction[14]);
+          const pixelRatioScale = [
+            /** @type {number} */ (instruction[14]),
+            /** @type {number} */ (instruction[14]),
+          ];
 
           const textState = this.textStates[textKey];
           const font = textState.font;
-          const textScale = textState.scale * measurePixelRatio;
+          const textScale = [
+            textState.scale[0] * measurePixelRatio,
+            textState.scale[1] * measurePixelRatio,
+          ];
 
           let cachedWidths;
           if (font in this.widths_) {
@@ -930,7 +941,8 @@ class Executor {
 
           const pathLength = lineStringLength(pixelCoordinates, begin, end, 2);
           const textLength =
-            textScale * measureAndCacheTextWidth(font, text, cachedWidths);
+            Math.abs(textScale[0]) *
+            measureAndCacheTextWidth(font, text, cachedWidths);
           if (overflow || textLength <= pathLength) {
             const textAlign = this.textStates[textKey].textAlign;
             const startM = (pathLength - textLength) * TEXT_ALIGN[textAlign];
@@ -942,7 +954,7 @@ class Executor {
               text,
               startM,
               maxAngle,
-              textScale,
+              Math.abs(textScale[0]),
               measureAndCacheTextWidth,
               font,
               cachedWidths
@@ -958,7 +970,8 @@ class Executor {
                   anchorX = /** @type {number} */ (part[2]) + strokeWidth;
                   anchorY =
                     baseline * label.height +
-                    (0.5 - baseline) * 2 * strokeWidth -
+                    ((0.5 - baseline) * 2 * strokeWidth * textScale[1]) /
+                      textScale[0] -
                     offsetY;
                   rendered =
                     this.replayImageOrLabel_(

src/ol/render/canvas/ImageBuilder.js

@@ -82,7 +82,7 @@ class CanvasImageBuilder extends CanvasBuilder {
 
     /**
      * @private
-     * @type {number|undefined}
+     * @type {import("../../size.js").Size|undefined}
      */
     this.scale_ = undefined;
 
@@ -145,7 +145,7 @@ class CanvasImageBuilder extends CanvasBuilder {
       this.originY_,
       this.rotateWithView_,
       this.rotation_,
-      this.scale_ * this.pixelRatio,
+      [this.scale_[0] * this.pixelRatio, this.scale_[1] * this.pixelRatio],
       this.width_,
     ]);
     this.hitDetectionInstructions.push([
@@ -202,7 +202,7 @@ class CanvasImageBuilder extends CanvasBuilder {
       this.originY_,
       this.rotateWithView_,
       this.rotation_,
-      this.scale_ * this.pixelRatio,
+      [this.scale_[0] * this.pixelRatio, this.scale_[1] * this.pixelRatio],
       this.width_,
     ]);
     this.hitDetectionInstructions.push([
@@ -268,7 +268,7 @@ class CanvasImageBuilder extends CanvasBuilder {
     this.originY_ = origin[1];
     this.rotateWithView_ = imageStyle.getRotateWithView();
     this.rotation_ = imageStyle.getRotation();
-    this.scale_ = imageStyle.getScale();
+    this.scale_ = imageStyle.getScaleArray();
     this.width_ = size[0];
   }
 }

src/ol/render/canvas/Immediate.js

@@ -188,9 +188,9 @@ class CanvasImmediateRenderer extends VectorContext {
 
     /**
      * @private
-     * @type {number}
+     * @type {import("../../size.js").Size}
      */
-    this.imageScale_ = 0;
+    this.imageScale_ = [0, 0];
 
     /**
      * @private
@@ -230,9 +230,9 @@ class CanvasImmediateRenderer extends VectorContext {
 
     /**
      * @private
-     * @type {number}
+     * @type {import("../../size.js").Size}
      */
-    this.textScale_ = 0;
+    this.textScale_ = [0, 0];
 
     /**
      * @private
@@ -297,35 +297,51 @@ class CanvasImmediateRenderer extends VectorContext {
     for (let i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {
       const x = pixelCoordinates[i] - this.imageAnchorX_;
       const y = pixelCoordinates[i + 1] - this.imageAnchorY_;
-      if (rotation !== 0 || this.imageScale_ != 1) {
+      if (
+        rotation !== 0 ||
+        this.imageScale_[0] != 1 ||
+        this.imageScale_[1] != 1
+      ) {
         const centerX = x + this.imageAnchorX_;
         const centerY = y + this.imageAnchorY_;
         composeTransform(
           localTransform,
           centerX,
           centerY,
-          this.imageScale_,
-          this.imageScale_,
+          1,
+          1,
           rotation,
           -centerX,
           -centerY
         );
         context.setTransform.apply(context, localTransform);
+        context.translate(centerX, centerY);
+        context.scale(this.imageScale_[0], this.imageScale_[1]);
+        context.drawImage(
+          this.image_,
+          this.imageOriginX_,
+          this.imageOriginY_,
+          this.imageWidth_,
+          this.imageHeight_,
+          -this.imageAnchorX_,
+          -this.imageAnchorY_,
+          this.imageWidth_,
+          this.imageHeight_
+        );
+        context.setTransform(1, 0, 0, 1, 0, 0);
+      } else {
+        context.drawImage(
+          this.image_,
+          this.imageOriginX_,
+          this.imageOriginY_,
+          this.imageWidth_,
+          this.imageHeight_,
+          x,
+          y,
+          this.imageWidth_,
+          this.imageHeight_
+        );
       }
-      context.drawImage(
-        this.image_,
-        this.imageOriginX_,
-        this.imageOriginY_,
-        this.imageWidth_,
-        this.imageHeight_,
-        x,
-        y,
-        this.imageWidth_,
-        this.imageHeight_
-      );
-    }
-    if (rotation !== 0 || this.imageScale_ != 1) {
-      context.setTransform(1, 0, 0, 1, 0, 0);
     }
     if (this.imageOpacity_ != 1) {
       context.globalAlpha = alpha;
@@ -366,28 +382,39 @@ class CanvasImmediateRenderer extends VectorContext {
     for (; offset < end; offset += stride) {
       const x = pixelCoordinates[offset] + this.textOffsetX_;
       const y = pixelCoordinates[offset + 1] + this.textOffsetY_;
-      if (rotation !== 0 || this.textScale_ != 1) {
+      if (
+        rotation !== 0 ||
+        this.textScale_[0] != 1 ||
+        this.textScale_[1] != 1
+      ) {
         const localTransform = composeTransform(
           this.tmpLocalTransform_,
           x,
           y,
-          this.textScale_,
-          this.textScale_,
+          1,
+          1,
           rotation,
           -x,
           -y
         );
         context.setTransform.apply(context, localTransform);
+        context.translate(x, y);
+        context.scale(this.textScale_[0], this.textScale_[1]);
+        if (this.textStrokeState_) {
+          context.strokeText(this.text_, 0, 0);
+        }
+        if (this.textFillState_) {
+          context.fillText(this.text_, 0, 0);
+        }
+        context.setTransform(1, 0, 0, 1, 0, 0);
+      } else {
+        if (this.textStrokeState_) {
+          context.strokeText(this.text_, x, y);
+        }
+        if (this.textFillState_) {
+          context.fillText(this.text_, x, y);
+        }
       }
-      if (this.textStrokeState_) {
-        context.strokeText(this.text_, x, y);
-      }
-      if (this.textFillState_) {
-        context.fillText(this.text_, x, y);
-      }
-    }
-    if (rotation !== 0 || this.textScale_ != 1) {
-      context.setTransform(1, 0, 0, 1, 0, 0);
     }
   }
 
@@ -994,22 +1021,30 @@ class CanvasImmediateRenderer extends VectorContext {
     if (!imageStyle) {
       this.image_ = null;
     } else {
-      const imageAnchor = imageStyle.getAnchor();
-      // FIXME pixel ratio
-      const imageImage = imageStyle.getImage(1);
-      const imageOrigin = imageStyle.getOrigin();
       const imageSize = imageStyle.getSize();
-      this.imageAnchorX_ = imageAnchor[0];
-      this.imageAnchorY_ = imageAnchor[1];
-      this.imageHeight_ = imageSize[1];
-      this.image_ = imageImage;
-      this.imageOpacity_ = imageStyle.getOpacity();
-      this.imageOriginX_ = imageOrigin[0];
-      this.imageOriginY_ = imageOrigin[1];
-      this.imageRotateWithView_ = imageStyle.getRotateWithView();
-      this.imageRotation_ = imageStyle.getRotation();
-      this.imageScale_ = imageStyle.getScale() * this.pixelRatio_;
-      this.imageWidth_ = imageSize[0];
+      if (!imageSize) {
+        this.image_ = null;
+      } else {
+        const imageAnchor = imageStyle.getAnchor();
+        // FIXME pixel ratio
+        const imageImage = imageStyle.getImage(1);
+        const imageOrigin = imageStyle.getOrigin();
+        const imageScale = imageStyle.getScaleArray();
+        this.imageAnchorX_ = imageAnchor[0];
+        this.imageAnchorY_ = imageAnchor[1];
+        this.imageHeight_ = imageSize[1];
+        this.image_ = imageImage;
+        this.imageOpacity_ = imageStyle.getOpacity();
+        this.imageOriginX_ = imageOrigin[0];
+        this.imageOriginY_ = imageOrigin[1];
+        this.imageRotateWithView_ = imageStyle.getRotateWithView();
+        this.imageRotation_ = imageStyle.getRotation();
+        this.imageScale_ = [
+          this.pixelRatio_ * imageScale[0],
+          this.pixelRatio_ * imageScale[1],
+        ];
+        this.imageWidth_ = imageSize[0];
+      }
     }
   }
 
@@ -1078,7 +1113,7 @@ class CanvasImmediateRenderer extends VectorContext {
       const textOffsetY = textStyle.getOffsetY();
       const textRotateWithView = textStyle.getRotateWithView();
       const textRotation = textStyle.getRotation();
-      const textScale = textStyle.getScale();
+      const textScale = textStyle.getScaleArray();
       const textText = textStyle.getText();
       const textTextAlign = textStyle.getTextAlign();
       const textTextBaseline = textStyle.getTextBaseline();
@@ -1099,8 +1134,10 @@ class CanvasImmediateRenderer extends VectorContext {
       this.textRotateWithView_ =
         textRotateWithView !== undefined ? textRotateWithView : false;
       this.textRotation_ = textRotation !== undefined ? textRotation : 0;
-      this.textScale_ =
-        this.pixelRatio_ * (textScale !== undefined ? textScale : 1);
+      this.textScale_ = [
+        this.pixelRatio_ * textScale[0],
+        this.pixelRatio_ * textScale[1],
+      ];
     }
   }
 }

src/ol/render/canvas/TextBuilder.js

@@ -303,6 +303,27 @@ class CanvasTextBuilder extends CanvasBuilder {
 
       this.beginGeometry(geometry, feature);
 
+      // adjust padding for negative scale
+      let padding = textState.padding;
+      if (
+        padding != defaultPadding &&
+        (textState.scale[0] < 0 || textState.scale[1] < 0)
+      ) {
+        let p0 = textState.padding[0];
+        let p1 = textState.padding[1];
+        let p2 = textState.padding[2];
+        let p3 = textState.padding[3];
+        if (textState.scale[0] < 0) {
+          p1 = -p1;
+          p3 = -p3;
+        }
+        if (textState.scale[1] < 0) {
+          p0 = -p0;
+          p2 = -p2;
+        }
+        padding = [p0, p1, p2, p3];
+      }
+
       // The image is unknown at this stage so we pass null; it will be computed at render time.
       // For clarity, we pass NaN for offsetX, offsetY, width and height, which will be computed at
       // render time.
@@ -321,11 +342,11 @@ class CanvasTextBuilder extends CanvasBuilder {
         0,
         this.textRotateWithView_,
         this.textRotation_,
-        1,
+        [1, 1],
         NaN,
-        textState.padding == defaultPadding
+        padding == defaultPadding
           ? defaultPadding
-          : textState.padding.map(function (p) {
+          : padding.map(function (p) {
               return p * pixelRatio;
             }),
         !!textState.backgroundFill,
@@ -338,6 +359,7 @@ class CanvasTextBuilder extends CanvasBuilder {
         this.textOffsetY_,
         geometryWidths,
       ]);
+      const scale = 1 / pixelRatio;
       this.hitDetectionInstructions.push([
         CanvasInstruction.DRAW_IMAGE,
         begin,
@@ -352,9 +374,9 @@ class CanvasTextBuilder extends CanvasBuilder {
         0,
         this.textRotateWithView_,
         this.textRotation_,
-        1 / this.pixelRatio,
+        [scale, scale],
         NaN,
-        textState.padding,
+        padding,
         !!textState.backgroundFill,
         !!textState.backgroundStroke,
         this.text_,
@@ -431,9 +453,8 @@ class CanvasTextBuilder extends CanvasBuilder {
 
     const offsetY = this.textOffsetY_ * pixelRatio;
     const text = this.text_;
-    const textScale = textState.scale;
     const strokeWidth = strokeState
-      ? (strokeState.lineWidth * textScale) / 2
+      ? (strokeState.lineWidth * Math.abs(textState.scale[0])) / 2
       : 0;
 
     this.instructions.push([
@@ -529,7 +550,7 @@ class CanvasTextBuilder extends CanvasBuilder {
       textState = this.textState_;
       const font = textStyle.getFont() || defaultFont;
       registerFont(font);
-      const textScale = textStyle.getScale();
+      const textScale = textStyle.getScaleArray();
       textState.overflow = textStyle.getOverflow();
       textState.font = font;
       textState.maxAngle = textStyle.getMaxAngle();
@@ -540,7 +561,7 @@ class CanvasTextBuilder extends CanvasBuilder {
       textState.backgroundFill = textStyle.getBackgroundFill();
       textState.backgroundStroke = textStyle.getBackgroundStroke();
       textState.padding = textStyle.getPadding() || defaultPadding;
-      textState.scale = textScale === undefined ? 1 : textScale;
+      textState.scale = textScale === undefined ? [1, 1] : textScale;
 
       const textOffsetX = textStyle.getOffsetX();
       const textOffsetY = textStyle.getOffsetY();

src/ol/style/Icon.js

@@ -36,7 +36,7 @@ import {getUid} from '../util.js';
  * @property {import("./IconOrigin.js").default} [offsetOrigin='top-left'] Origin of the offset: `bottom-left`, `bottom-right`,
  * `top-left` or `top-right`.
  * @property {number} [opacity=1] Opacity of the icon.
- * @property {number} [scale=1] Scale.
+ * @property {number|import("../size.js").Size} [scale=1] Scale.
  * @property {boolean} [rotateWithView=false] Whether to rotate the icon with the view.
  * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).
  * @property {import("../size.js").Size} [size] Icon size in pixel. Can be used together with `offset` to define the
@@ -69,7 +69,7 @@ class Icon extends ImageStyle {
     const rotation = options.rotation !== undefined ? options.rotation : 0;
 
     /**
-     * @type {number}
+     * @type {number|import("../size.js").Size}
      */
     const scale = options.scale !== undefined ? options.scale : 1;
 
@@ -215,6 +215,7 @@ class Icon extends ImageStyle {
    * @api
    */
   clone() {
+    const scale = this.getScale();
     return new Icon({
       anchor: this.anchor_.slice(),
       anchorOrigin: this.anchorOrigin_,
@@ -230,7 +231,7 @@ class Icon extends ImageStyle {
       offsetOrigin: this.offsetOrigin_,
       size: this.size_ !== null ? this.size_.slice() : undefined,
       opacity: this.getOpacity(),
-      scale: this.getScale(),
+      scale: Array.isArray(scale) ? scale.slice() : scale,
       rotation: this.getRotation(),
       rotateWithView: this.getRotateWithView(),
     });

src/ol/style/Image.js

@@ -2,13 +2,14 @@
  * @module ol/style/Image
  */
 import {abstract} from '../util.js';
+import {toSize} from '../size.js';
 
 /**
  * @typedef {Object} Options
  * @property {number} opacity
  * @property {boolean} rotateWithView
  * @property {number} rotation
- * @property {number} scale
+ * @property {number|import("../size.js").Size} scale
  * @property {Array<number>} displacement
  */
 
@@ -45,10 +46,16 @@ class ImageStyle {
 
     /**
      * @private
-     * @type {number}
+     * @type {number|import("../size.js").Size}
      */
     this.scale_ = options.scale;
 
+    /**
+     * @private
+     * @type {import("../size.js").Size}
+     */
+    this.scaleArray_ = toSize(options.scale);
+
     /**
      * @private
      * @type {Array<number>}
@@ -62,9 +69,10 @@ class ImageStyle {
    * @api
    */
   clone() {
+    const scale = this.getScale();
     return new ImageStyle({
       opacity: this.getOpacity(),
-      scale: this.getScale(),
+      scale: Array.isArray(scale) ? scale.slice() : scale,
       rotation: this.getRotation(),
       rotateWithView: this.getRotateWithView(),
       displacement: this.getDisplacement().slice(),
@@ -100,13 +108,21 @@ class ImageStyle {
 
   /**
    * Get the symbolizer scale.
-   * @return {number} Scale.
+   * @return {number|import("../size.js").Size} Scale.
    * @api
    */
   getScale() {
     return this.scale_;
   }
 
+  /**
+   * Get the symbolizer scale array.
+   * @return {import("../size.js").Size} Scale array.
+   */
+  getScaleArray() {
+    return this.scaleArray_;
+  }
+
   /**
    * Get the displacement of the shape
    * @return {Array<number>} Shape's center displacement
@@ -219,11 +235,12 @@ class ImageStyle {
   /**
    * Set the scale.
    *
-   * @param {number} scale Scale.
+   * @param {number|import("../size.js").Size} scale Scale.
    * @api
    */
   setScale(scale) {
     this.scale_ = scale;
+    this.scaleArray_ = toSize(scale);
   }
 
   /**

src/ol/style/Text.js

@@ -3,6 +3,7 @@
  */
 import Fill from './Fill.js';
 import TextPlacement from './TextPlacement.js';
+import {toSize} from '../size.js';
 
 /**
  * The default fill color to use if no fill was set at construction time; a
@@ -23,7 +24,7 @@ const DEFAULT_FILL_COLOR = '#333';
  * @property {boolean} [overflow=false] For polygon labels or when `placement` is set to `'line'`, allow text to exceed
  * the width of the polygon at the label position or the length of the path that it follows.
  * @property {import("./TextPlacement.js").default|string} [placement='point'] Text placement.
- * @property {number} [scale] Scale.
+ * @property {number|import("../size.js").Size} [scale] Scale.
  * @property {boolean} [rotateWithView=false] Whether to rotate the text with the view.
  * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).
  * @property {string} [text] Text content.
@@ -74,10 +75,16 @@ class Text {
 
     /**
      * @private
-     * @type {number|undefined}
+     * @type {number|import("../size.js").Size|undefined}
      */
     this.scale_ = options.scale;
 
+    /**
+     * @private
+     * @type {import("../size.js").Size}
+     */
+    this.scaleArray_ = toSize(options.scale !== undefined ? options.scale : 1);
+
     /**
      * @private
      * @type {string|undefined}
@@ -172,6 +179,7 @@ class Text {
    * @api
    */
   clone() {
+    const scale = this.getScale();
     return new Text({
       font: this.getFont(),
       placement: this.getPlacement(),
@@ -179,7 +187,7 @@ class Text {
       overflow: this.getOverflow(),
       rotation: this.getRotation(),
       rotateWithView: this.getRotateWithView(),
-      scale: this.getScale(),
+      scale: Array.isArray(scale) ? scale.slice() : scale,
       text: this.getText(),
       textAlign: this.getTextAlign(),
       textBaseline: this.getTextBaseline(),
@@ -280,13 +288,21 @@ class Text {
 
   /**
    * Get the text scale.
-   * @return {number|undefined} Scale.
+   * @return {number|import("../size.js").Size|undefined} Scale.
    * @api
    */
   getScale() {
     return this.scale_;
   }
 
+  /**
+   * Get the symbolizer scale array.
+   * @return {import("../size.js").Size} Scale array.
+   */
+  getScaleArray() {
+    return this.scaleArray_;
+  }
+
   /**
    * Get the stroke style for the text.
    * @return {import("./Stroke.js").default} Stroke style.
@@ -443,11 +459,12 @@ class Text {
   /**
    * Set the scale.
    *
-   * @param {number|undefined} scale Scale.
+   * @param {number|import("../size.js").Size|undefined} scale Scale.
    * @api
    */
   setScale(scale) {
     this.scale_ = scale;
+    this.scaleArray_ = toSize(scale !== undefined ? scale : 1);
   }
 
   /**