371 lines
12 KiB
JavaScript
371 lines
12 KiB
JavaScript
/**
|
|
* @module ol/renderer/canvas/VectorLayer
|
|
*/
|
|
import {getUid} from '../../util.js';
|
|
import ViewHint from '../../ViewHint.js';
|
|
import {buffer, createEmpty, containsExtent, getWidth} from '../../extent.js';
|
|
import CanvasBuilderGroup from '../../render/canvas/BuilderGroup.js';
|
|
import ExecutorGroup, {replayDeclutter} from '../../render/canvas/ExecutorGroup.js';
|
|
import CanvasLayerRenderer from './Layer.js';
|
|
import {defaultOrder as defaultRenderOrder, getTolerance as getRenderTolerance, getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';
|
|
import {toString as transformToString, makeScale, makeInverse} from '../../transform.js';
|
|
|
|
/**
|
|
* @classdesc
|
|
* Canvas renderer for vector layers.
|
|
* @api
|
|
*/
|
|
class CanvasVectorLayerRenderer extends CanvasLayerRenderer {
|
|
|
|
/**
|
|
* @param {import("../../layer/Vector.js").default} vectorLayer Vector layer.
|
|
*/
|
|
constructor(vectorLayer) {
|
|
|
|
super(vectorLayer);
|
|
|
|
/**
|
|
* @private
|
|
* @type {boolean}
|
|
*/
|
|
this.dirty_ = false;
|
|
|
|
/**
|
|
* @private
|
|
* @type {number}
|
|
*/
|
|
this.renderedRevision_ = -1;
|
|
|
|
/**
|
|
* @private
|
|
* @type {number}
|
|
*/
|
|
this.renderedResolution_ = NaN;
|
|
|
|
/**
|
|
* @private
|
|
* @type {import("../../extent.js").Extent}
|
|
*/
|
|
this.renderedExtent_ = createEmpty();
|
|
|
|
/**
|
|
* @private
|
|
* @type {function(import("../../Feature.js").default, import("../../Feature.js").default): number|null}
|
|
*/
|
|
this.renderedRenderOrder_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {import("../../render/canvas/ExecutorGroup").default}
|
|
*/
|
|
this.replayGroup_ = null;
|
|
|
|
/**
|
|
* A new replay group had to be created by `prepareFrame()`
|
|
* @type {boolean}
|
|
*/
|
|
this.replayGroupChanged = true;
|
|
}
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
renderFrame(frameState, layerState, target) {
|
|
|
|
const pixelRatio = frameState.pixelRatio;
|
|
|
|
// set forward and inverse pixel transforms
|
|
makeScale(this.pixelTransform_, 1 / pixelRatio, 1 / pixelRatio);
|
|
makeInverse(this.inversePixelTransform_, this.pixelTransform_);
|
|
|
|
this.useContainer(target, this.pixelTransform_);
|
|
const context = this.context;
|
|
const canvas = context.canvas;
|
|
|
|
const replayGroup = this.replayGroup_;
|
|
if (!replayGroup || replayGroup.isEmpty()) {
|
|
if (!this.containerReused && canvas.width > 0) {
|
|
canvas.width = 0;
|
|
}
|
|
return this.container;
|
|
}
|
|
|
|
// resize and clear
|
|
const width = Math.round(frameState.size[0] * pixelRatio);
|
|
const height = Math.round(frameState.size[1] * pixelRatio);
|
|
if (canvas.width != width || canvas.height != height) {
|
|
canvas.width = width;
|
|
canvas.height = height;
|
|
const canvasTransform = transformToString(this.pixelTransform_);
|
|
if (canvas.style.transform !== canvasTransform) {
|
|
canvas.style.transform = canvasTransform;
|
|
}
|
|
} else if (!this.containerReused) {
|
|
context.clearRect(0, 0, width, height);
|
|
}
|
|
|
|
this.preRender(context, frameState);
|
|
|
|
const extent = frameState.extent;
|
|
const viewState = frameState.viewState;
|
|
const projection = viewState.projection;
|
|
const rotation = viewState.rotation;
|
|
const projectionExtent = projection.getExtent();
|
|
const vectorSource = this.getLayer().getSource();
|
|
|
|
// clipped rendering if layer extent is set
|
|
const clipExtent = layerState.extent;
|
|
const clipped = clipExtent !== undefined;
|
|
if (clipped) {
|
|
this.clip(context, frameState, clipExtent);
|
|
}
|
|
|
|
|
|
const viewHints = frameState.viewHints;
|
|
const snapToPixel = !(viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]);
|
|
|
|
const transform = this.getRenderTransform(frameState, width, height, 0);
|
|
const skippedFeatureUids = layerState.managed ? frameState.skippedFeatureUids : {};
|
|
const declutterReplays = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer()).getDeclutter() ? {} : null;
|
|
replayGroup.execute(context, transform, rotation, skippedFeatureUids, snapToPixel, undefined, declutterReplays);
|
|
|
|
if (vectorSource.getWrapX() && projection.canWrapX() && !containsExtent(projectionExtent, extent)) {
|
|
let startX = extent[0];
|
|
const worldWidth = getWidth(projectionExtent);
|
|
let world = 0;
|
|
let offsetX;
|
|
while (startX < projectionExtent[0]) {
|
|
--world;
|
|
offsetX = worldWidth * world;
|
|
const transform = this.getRenderTransform(frameState, width, height, offsetX);
|
|
replayGroup.execute(context, transform, rotation, skippedFeatureUids, snapToPixel, undefined, declutterReplays);
|
|
startX += worldWidth;
|
|
}
|
|
world = 0;
|
|
startX = extent[2];
|
|
while (startX > projectionExtent[2]) {
|
|
++world;
|
|
offsetX = worldWidth * world;
|
|
const transform = this.getRenderTransform(frameState, width, height, offsetX);
|
|
replayGroup.execute(context, transform, rotation, skippedFeatureUids, snapToPixel, undefined, declutterReplays);
|
|
startX -= worldWidth;
|
|
}
|
|
}
|
|
if (declutterReplays) {
|
|
const viewHints = frameState.viewHints;
|
|
const hifi = !(viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]);
|
|
replayDeclutter(declutterReplays, context, rotation, hifi, frameState.declutterItems);
|
|
}
|
|
|
|
if (clipped) {
|
|
context.restore();
|
|
}
|
|
|
|
this.postRender(context, frameState);
|
|
|
|
const opacity = layerState.opacity;
|
|
if (opacity !== parseFloat(canvas.style.opacity)) {
|
|
canvas.style.opacity = opacity;
|
|
}
|
|
|
|
return this.container;
|
|
}
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, callback, declutteredFeatures) {
|
|
if (!this.replayGroup_) {
|
|
return undefined;
|
|
} else {
|
|
const resolution = frameState.viewState.resolution;
|
|
const rotation = frameState.viewState.rotation;
|
|
const layer = /** @type {import("../../layer/Vector").default} */ (this.getLayer());
|
|
/** @type {!Object<string, boolean>} */
|
|
const features = {};
|
|
const result = this.replayGroup_.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},
|
|
/**
|
|
* @param {import("../../Feature.js").FeatureLike} feature Feature.
|
|
* @return {?} Callback result.
|
|
*/
|
|
function(feature) {
|
|
const key = getUid(feature);
|
|
if (!(key in features)) {
|
|
features[key] = true;
|
|
return callback(feature, layer);
|
|
}
|
|
}, layer.getDeclutter() ? declutteredFeatures : null);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
handleFontsChanged() {
|
|
const layer = this.getLayer();
|
|
if (layer.getVisible() && this.replayGroup_) {
|
|
layer.changed();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handle changes in image style state.
|
|
* @param {import("../../events/Event.js").default} event Image style change event.
|
|
* @private
|
|
*/
|
|
handleStyleImageChange_(event) {
|
|
this.renderIfReadyAndVisible();
|
|
}
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
prepareFrame(frameState, layerState) {
|
|
const vectorLayer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
|
|
const vectorSource = vectorLayer.getSource();
|
|
|
|
const animating = frameState.viewHints[ViewHint.ANIMATING];
|
|
const interacting = frameState.viewHints[ViewHint.INTERACTING];
|
|
const updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();
|
|
const updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();
|
|
|
|
if (!this.dirty_ && (!updateWhileAnimating && animating) ||
|
|
(!updateWhileInteracting && interacting)) {
|
|
return true;
|
|
}
|
|
|
|
const frameStateExtent = frameState.extent;
|
|
const viewState = frameState.viewState;
|
|
const projection = viewState.projection;
|
|
const resolution = viewState.resolution;
|
|
const pixelRatio = frameState.pixelRatio;
|
|
const vectorLayerRevision = vectorLayer.getRevision();
|
|
const vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();
|
|
let vectorLayerRenderOrder = vectorLayer.getRenderOrder();
|
|
|
|
if (vectorLayerRenderOrder === undefined) {
|
|
vectorLayerRenderOrder = defaultRenderOrder;
|
|
}
|
|
|
|
const extent = buffer(frameStateExtent,
|
|
vectorLayerRenderBuffer * resolution);
|
|
const projectionExtent = viewState.projection.getExtent();
|
|
|
|
if (vectorSource.getWrapX() && viewState.projection.canWrapX() &&
|
|
!containsExtent(projectionExtent, frameState.extent)) {
|
|
// For the replay group, we need an extent that intersects the real world
|
|
// (-180° to +180°). To support geometries in a coordinate range from -540°
|
|
// to +540°, we add at least 1 world width on each side of the projection
|
|
// extent. If the viewport is wider than the world, we need to add half of
|
|
// the viewport width to make sure we cover the whole viewport.
|
|
const worldWidth = getWidth(projectionExtent);
|
|
const gutter = Math.max(getWidth(extent) / 2, worldWidth);
|
|
extent[0] = projectionExtent[0] - gutter;
|
|
extent[2] = projectionExtent[2] + gutter;
|
|
}
|
|
|
|
if (!this.dirty_ &&
|
|
this.renderedResolution_ == resolution &&
|
|
this.renderedRevision_ == vectorLayerRevision &&
|
|
this.renderedRenderOrder_ == vectorLayerRenderOrder &&
|
|
containsExtent(this.renderedExtent_, extent)) {
|
|
this.replayGroupChanged = false;
|
|
return true;
|
|
}
|
|
|
|
if (this.replayGroup_) {
|
|
this.replayGroup_.dispose();
|
|
}
|
|
this.replayGroup_ = null;
|
|
|
|
this.dirty_ = false;
|
|
|
|
const replayGroup = new CanvasBuilderGroup(
|
|
getRenderTolerance(resolution, pixelRatio), extent, resolution,
|
|
pixelRatio, vectorLayer.getDeclutter());
|
|
|
|
vectorSource.loadFeatures(extent, resolution, projection);
|
|
|
|
/**
|
|
* @param {import("../../Feature.js").default} feature Feature.
|
|
* @this {CanvasVectorLayerRenderer}
|
|
*/
|
|
const render = function(feature) {
|
|
let styles;
|
|
const styleFunction = feature.getStyleFunction() || vectorLayer.getStyleFunction();
|
|
if (styleFunction) {
|
|
styles = styleFunction(feature, resolution);
|
|
}
|
|
if (styles) {
|
|
const dirty = this.renderFeature(
|
|
feature, resolution, pixelRatio, styles, replayGroup);
|
|
this.dirty_ = this.dirty_ || dirty;
|
|
}
|
|
}.bind(this);
|
|
if (vectorLayerRenderOrder) {
|
|
/** @type {Array<import("../../Feature.js").default>} */
|
|
const features = [];
|
|
vectorSource.forEachFeatureInExtent(extent,
|
|
/**
|
|
* @param {import("../../Feature.js").default} feature Feature.
|
|
*/
|
|
function(feature) {
|
|
features.push(feature);
|
|
});
|
|
features.sort(vectorLayerRenderOrder);
|
|
for (let i = 0, ii = features.length; i < ii; ++i) {
|
|
render(features[i]);
|
|
}
|
|
} else {
|
|
vectorSource.forEachFeatureInExtent(extent, render);
|
|
}
|
|
|
|
const replayGroupInstructions = replayGroup.finish();
|
|
const executorGroup = new ExecutorGroup(extent, resolution,
|
|
pixelRatio, vectorSource.getOverlaps(),
|
|
replayGroupInstructions, vectorLayer.getRenderBuffer());
|
|
|
|
this.renderedResolution_ = resolution;
|
|
this.renderedRevision_ = vectorLayerRevision;
|
|
this.renderedRenderOrder_ = vectorLayerRenderOrder;
|
|
this.renderedExtent_ = extent;
|
|
this.replayGroup_ = executorGroup;
|
|
|
|
this.replayGroupChanged = true;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param {import("../../Feature.js").default} feature Feature.
|
|
* @param {number} resolution Resolution.
|
|
* @param {number} pixelRatio Pixel ratio.
|
|
* @param {import("../../style/Style.js").default|Array<import("../../style/Style.js").default>} styles The style or array of styles.
|
|
* @param {import("../../render/canvas/BuilderGroup.js").default} builderGroup Builder group.
|
|
* @return {boolean} `true` if an image is loading.
|
|
*/
|
|
renderFeature(feature, resolution, pixelRatio, styles, builderGroup) {
|
|
if (!styles) {
|
|
return false;
|
|
}
|
|
let loading = false;
|
|
if (Array.isArray(styles)) {
|
|
for (let i = 0, ii = styles.length; i < ii; ++i) {
|
|
loading = renderFeature(
|
|
builderGroup, feature, styles[i],
|
|
getSquaredRenderTolerance(resolution, pixelRatio),
|
|
this.handleStyleImageChange_, this) || loading;
|
|
}
|
|
} else {
|
|
loading = renderFeature(
|
|
builderGroup, feature, styles,
|
|
getSquaredRenderTolerance(resolution, pixelRatio),
|
|
this.handleStyleImageChange_, this);
|
|
}
|
|
return loading;
|
|
}
|
|
}
|
|
|
|
|
|
export default CanvasVectorLayerRenderer;
|