1719886-1.html - mozsearch

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<!DOCTYPE html>

<html>

<body>

Pattern Canvas<br>

<canvas id="patternCanvas" style="border: 1px solid black" width="10" height="10"></canvas><br>

Main Canvas (red square should be in top-left corner)<br>

<canvas id="canvas" style="border: 1px solid black" width="100" height="100"></canvas>

<script>

// Draw a 10x10 red rectangle that will be used for the pattern.

const patternCanvas = document.getElementById("patternCanvas");

const patternCtx = patternCanvas.getContext("2d");

patternCtx.fillStyle = "red";

patternCtx.fillRect(0, 0, patternCanvas.width, patternCanvas.height);

const canvas = document.getElementById("canvas");

const ctx = canvas.getContext("2d");

const height = 100;

ctx.translate(0, height);

const pattern = ctx.createPattern(patternCanvas, "no-repeat");

// Reverse translation applied to the canvas.

pattern.setTransform((new DOMMatrix()).translate(0, -height));

ctx.fillStyle = pattern;

// Fill the entire canvas with the pattern.

ctx.fillRect(0, -height, 100, 100);

</script>

</body>

</html>