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Fix layer render extent when it is not at all in view

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This commit is contained in:
Maximilian Krög
2021-06-28 00:22:53 +02:00
parent f57413fc04
commit 83226cc79a
3 changed files with 13 additions and 44 deletions
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33
src/ol/renderer/canvas/Layer.js
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@@ -17,7 +17,6 @@ import {
getTopRight,
} from '../../extent.js';
import {createCanvasContext2D} from '../../dom.js';
import {rotateAtOffset} from '../../render/canvas.js';
/**
* @abstract
@@ -130,38 +129,6 @@ class CanvasLayerRenderer extends LayerRenderer {
}
}
/**
* @param {CanvasRenderingContext2D} context Context.
* @param {import("../../PluggableMap.js").FrameState} frameState Frame state.
* @param {import("../../extent.js").Extent} extent Clip extent.
* @protected
*/
clip(context, frameState, extent) {
const pixelRatio = frameState.pixelRatio;
const halfWidth = (frameState.size[0] * pixelRatio) / 2;
const halfHeight = (frameState.size[1] * pixelRatio) / 2;
const rotation = frameState.viewState.rotation;
const topLeft = getTopLeft(extent);
const topRight = getTopRight(extent);
const bottomRight = getBottomRight(extent);
const bottomLeft = getBottomLeft(extent);
applyTransform(frameState.coordinateToPixelTransform, topLeft);
applyTransform(frameState.coordinateToPixelTransform, topRight);
applyTransform(frameState.coordinateToPixelTransform, bottomRight);
applyTransform(frameState.coordinateToPixelTransform, bottomLeft);
context.save();
rotateAtOffset(context, -rotation, halfWidth, halfHeight);
context.beginPath();
context.moveTo(topLeft[0] * pixelRatio, topLeft[1] * pixelRatio);
context.lineTo(topRight[0] * pixelRatio, topRight[1] * pixelRatio);
context.lineTo(bottomRight[0] * pixelRatio, bottomRight[1] * pixelRatio);
context.lineTo(bottomLeft[0] * pixelRatio, bottomLeft[1] * pixelRatio);
context.clip();
rotateAtOffset(context, rotation, halfWidth, halfHeight);
}
/**
* @param {CanvasRenderingContext2D} context Context.
* @param {import("../../PluggableMap.js").FrameState} frameState Frame state.