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Add layer flipH/flipV properties and rendering support

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Refactors horizontal and vertical mirroring to toggle flipH/flipV properties on layers instead of modifying image data. Updates rendering logic in CanvasLayers and CanvasRenderer to apply horizontal/vertical flipping via canvas transforms. Adds flipH and flipV to Layer type and includes them in state signature calculation.
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Dariusz L
2025-07-21 22:35:18 +02:00
parent 674879b497
commit 57bd1e1499
7 changed files with 52 additions and 84 deletions
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5
js/CanvasRenderer.js
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@@ -58,6 +58,11 @@ export class CanvasRenderer {
const centerY = layer.y + layer.height / 2;
ctx.translate(centerX, centerY);
ctx.rotate(layer.rotation * Math.PI / 180);
const scaleH = layer.flipH ? -1 : 1;
const scaleV = layer.flipV ? -1 : 1;
if (layer.flipH || layer.flipV) {
ctx.scale(scaleH, scaleV);
}
ctx.imageSmoothingEnabled = true;
ctx.imageSmoothingQuality = 'high';
ctx.drawImage(layer.image, -layer.width / 2, -layer.height / 2, layer.width, layer.height);