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Save and restore before rendering labels

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This commit is contained in:
Andreas Hocevar
2020-01-25 20:53:50 +01:00
parent a24c94487c
commit 542b77eef8
1 changed files with 6 additions and 15 deletions
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src/ol/render/canvas.js
+6 -15
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@@ -401,30 +401,21 @@ export const resetTransform = createTransform();
*/ */
export function drawImageOrLabel(context, export function drawImageOrLabel(context,
transform, opacity, labelOrImage, originX, originY, w, h, x, y, scale) { transform, opacity, labelOrImage, originX, originY, w, h, x, y, scale) {
let alpha; context.save();
if (opacity != 1) {
alpha = context.globalAlpha;
context.globalAlpha = alpha * opacity;
}
if (transform) { if (transform) {
context.setTransform.apply(context, transform); context.setTransform.apply(context, transform);
} }
const isLabel = !!(/** @type {*} */ (labelOrImage).contextInstructions); if ((/** @type {*} */ (labelOrImage).contextInstructions)) {
// label
if (isLabel) {
context.translate(x, y); context.translate(x, y);
context.scale(scale, scale); context.scale(scale, scale);
executeLabelInstructions(/** @type {import("./canvas/Executor.js").Label} */ (labelOrImage), context); executeLabelInstructions(/** @type {import("./canvas/Executor.js").Label} */ (labelOrImage), context);
} else { } else {
// image
context.drawImage(/** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (labelOrImage), originX, originY, w, h, x, y, w * scale, h * scale); context.drawImage(/** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (labelOrImage), originX, originY, w, h, x, y, w * scale, h * scale);
} }
if (opacity != 1) { context.restore();
context.globalAlpha = alpha;
}
if (transform || isLabel) {
context.setTransform.apply(context, resetTransform);
}
} }