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Unified Diff: LayoutTests/fast/canvas/canvas-large-pattern.html

Issue 57643005: [2D Canvas] Fix crash in createPattern method when using invalid canvas as source. (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 7 years, 1 month ago
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Index: LayoutTests/fast/canvas/canvas-large-pattern.html
diff --git a/LayoutTests/fast/canvas/canvas-large-pattern.html b/LayoutTests/fast/canvas/canvas-large-pattern.html
new file mode 100644
index 0000000000000000000000000000000000000000..3f648e83fc4094aa3e7377d5722ef1d2b7d8e5ac
--- /dev/null
+++ b/LayoutTests/fast/canvas/canvas-large-pattern.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+ <script src="../js/resources/js-test-pre.js"></script>
+ <script type="text/javascript">
+
+ description("Verifies createPattern using a source image that is a canvas 40k pixels wide.");
+ // This test does not currently succeed because skia does not handle
+ // canvases more than 32k pixels wide. For now, this test serves the
+ // purpose of verifying that this use case does not crash the browser.
+ // Crasher bug: crbug.com/281504
+
+ var canvas = document.createElement('canvas');
+ canvas.width = 40000;
+ var context = canvas.getContext('2d');
+ context.fillStyle = '#0f0';
+ context.fillRect(0, 0, 1, 1);
+
+ var dstCanvas = document.createElement('canvas');
+ var dstContext = dstCanvas.getContext('2d');
+ var pattern = dstContext.createPattern(canvas, 'repeat');
+ dstContext.fillStyle = pattern;
+ dstContext.fillRect(0, 0, dstCanvas.width, dstCanvas.height);
+
+ var imageData = dstContext.getImageData(0, 0, 1, 1);
+ var imgdata = imageData.data;
+ shouldBe("imgdata[0]", "0");
+ shouldBe("imgdata[1]", "255");
+ shouldBe("imgdata[2]", "0");
+ shouldBe("imgdata[3]", "255");
+
+ imageData = dstContext.getImageData(1, 0, 1, 1);
+ imgdata = imageData.data;
+ shouldBe("imgdata[0]", "0");
+ shouldBe("imgdata[1]", "0");
+ shouldBe("imgdata[2]", "0");
+ shouldBe("imgdata[3]", "0");
+
+ imageData = dstContext.getImageData(0, 1, 1, 1);
+ imgdata = imageData.data;
+ shouldBe("imgdata[0]", "0");
+ shouldBe("imgdata[1]", "0");
+ shouldBe("imgdata[2]", "0");
+ shouldBe("imgdata[3]", "0");
+ </script>
+ <script src="../js/resources/js-test-post.js"></script>
+</body>
+</html>
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