145 lines
3.5 KiB
HTML
145 lines
3.5 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 when drawing a canvas on a canvas with shadows. 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)
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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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if (Math.abs(evalA - b) < 15)
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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.shadowOffsetX = 100;
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ctx.shadowOffsetY = 100;
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var aCanvas = document.createElement('canvas');
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aCanvas.width = 300;
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aCanvas.height = 300;
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var aCtx = aCanvas.getContext('2d');
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aCtx.fillStyle = 'rgba(0, 0, 255, 1.0)';
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aCtx.fillRect(100, 100, 100, 100);
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ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
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ctx.drawImage(aCanvas, 0, 0);
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ctx.shadowColor = 'rgba(255, 0, 0, 0.5)';
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ctx.drawImage(aCanvas, 0, 200);
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ctx.shadowBlur = 5;
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ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
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ctx.drawImage(aCanvas, 200, 0);
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ctx.shadowColor = 'rgba(255, 0, 0, 0.5)';
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ctx.drawImage(aCanvas, 200, 200);
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var d; // imageData.data
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// Verify solid shadow.
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d = ctx.getImageData(200, 205, 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(299, 295, 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, 299, 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(200, 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]', '127');
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d = ctx.getImageData(299, 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]', '127');
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d = ctx.getImageData(205, 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]', '127');
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// Verify blurry shadow.
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d = ctx.getImageData(500, 211, 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]', '100');
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d = ctx.getImageData(399, 205, 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]', '100');
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d = ctx.getImageData(450, 300, 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]', '100');
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// Verify blurry alpha shadow.
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d = ctx.getImageData(500, 411, 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]', '50');
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d = ctx.getImageData(399, 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]', '50');
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d = ctx.getImageData(450, 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]', '50');
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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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