169 lines
3.9 KiB
HTML
169 lines
3.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<script src="../../resources/js-test-pre.js"></script>
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</head>
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<body>
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<script>
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description("Ensure correct behavior of canvas with path stroke + shadow after scaling. A blue and red checkered pattern should be displayed.");
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function print(message, color)
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{
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var paragraph = document.createElement("div");
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paragraph.appendChild(document.createTextNode(message));
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paragraph.style.fontFamily = "monospace";
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if (color)
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paragraph.style.color = color;
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document.getElementById("console").appendChild(paragraph);
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}
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function shouldBeAround(a, b, argdelta)
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{
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var evalA;
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try {
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evalA = eval(a);
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} catch(e) {
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evalA = e;
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}
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var delta = 20;
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if (typeof argdelta != "undefined")
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delta = argdelta;
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if (Math.abs(evalA - b) < delta)
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print("PASS " + a + " is around " + b , "green")
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else
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print("FAIL " + a + " is not around " + b + " (actual: " + evalA + ")", "red");
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}
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var canvas = document.createElement('canvas');
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document.body.appendChild(canvas);
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canvas.setAttribute('width', '600');
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canvas.setAttribute('height', '600');
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var ctx = canvas.getContext('2d');
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ctx.scale(2, 2);
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ctx.shadowOffsetX = 100;
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ctx.shadowOffsetY = 100;
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ctx.strokeStyle = 'rgba(0, 0, 255, 1)';
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ctx.lineWidth = 5;
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ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
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ctx.beginPath();
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ctx.moveTo(50, 50);
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ctx.lineTo(100, 50);
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ctx.lineTo(100, 100);
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ctx.lineTo(50, 100);
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ctx.lineTo(50, 50);
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ctx.stroke();
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ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
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ctx.beginPath();
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ctx.moveTo(50, 150);
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ctx.lineTo(100, 150);
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ctx.lineTo(100, 200);
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ctx.lineTo(50, 200);
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ctx.lineTo(50, 150);
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ctx.stroke();
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ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
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ctx.shadowBlur = 10;
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ctx.beginPath();
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ctx.moveTo(150, 50);
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ctx.lineTo(200, 50);
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ctx.lineTo(200, 100);
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ctx.lineTo(150, 100);
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ctx.lineTo(150, 50);
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ctx.stroke();
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ctx.shadowColor = 'rgba(255, 0, 0, 0.6)';
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ctx.beginPath();
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ctx.moveTo(150, 150);
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ctx.lineTo(200, 150);
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ctx.lineTo(200, 200);
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ctx.lineTo(150, 200);
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ctx.lineTo(150, 150);
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ctx.stroke();
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var d; // imageData.data
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// Verify solid shadow.
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d = ctx.getImageData(250, 200, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBe('d[3]', '255');
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d = ctx.getImageData(300, 290, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBe('d[3]', '255');
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d = ctx.getImageData(200, 250, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBe('d[3]', '255');
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// Verify solid alpha shadow.
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d = ctx.getImageData(201, 405, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '76');
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d = ctx.getImageData(201, 500, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '76');
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d = ctx.getImageData(300, 499, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '76');
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// Verify blurry shadow.
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d = ctx.getImageData(398, 210, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '200', 25);
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d = ctx.getImageData(508, 250, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '49');
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d = ctx.getImageData(450, 198, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '199', 25);
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// Verify blurry alpha shadow.
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d = ctx.getImageData(505, 450, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '70');
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d = ctx.getImageData(505, 450, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '70');
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d = ctx.getImageData(450, 405, 1, 1).data;
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shouldBe('d[0]', '255');
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shouldBe('d[1]', '0');
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shouldBe('d[2]', '0');
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shouldBeAround('d[3]', '69');
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</script>
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<script src="../../resources/js-test-post.js"></script>
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</body>
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</html>
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