third_party/WebKit/LayoutTests/fast/canvas/canvas-imageSmoothingQuality.html - Issue 2157953002: Change filter quality when scaling-down in drawImage

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Issue 2157953002: Change filter quality when scaling-down in drawImage (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: update test expectation Created 4 years, 5 months ago

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1 <!DOCTYPE html>	1 <!DOCTYPE html>

2 <html>	2 <html>

3 <body>	3 <body>

4 <script src="../../resources/js-test.js"></script>	4 <script src="../../resources/js-test.js"></script>

5 <canvas id="source"></canvas>	5 <canvas id="source"></canvas>

6 <canvas id="default"></canvas>	6 <canvas id="default"></canvas>

7 <script>	7 <script>

8	8

9 description("Tests for the imageSmoothingQuality attribute.");	9 description("Tests for the imageSmoothingQuality attribute.");

10	10

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78 lowContext.imageSmoothingEnabled = false;	78 lowContext.imageSmoothingEnabled = false;

79 var noFilterData = scaleImageData(lowCanvas, lowCanvas.imageSmoothingQuality);	79 var noFilterData = scaleImageData(lowCanvas, lowCanvas.imageSmoothingQuality);

80	80

81 debug("");	81 debug("");

82 shouldNotBe("lowData", "mediumData");	82 shouldNotBe("lowData", "mediumData");

83 // Skia uses mipmaps when downscaling, for both high and medium quality	83 // Skia uses mipmaps when downscaling, for both high and medium quality

84 shouldBe("mediumData", "highData");	84 shouldBe("mediumData", "highData");

85 shouldNotBe("lowData", "highData");	85 shouldNotBe("lowData", "highData");

86	86

87 debug("");	87 debug("");

88 shouldBeGreaterThan("sampleAlpha(noFilterData)", "sampleAlpha(lowData)");	88 shouldBe("sampleAlpha(noFilterData)", "sampleAlpha(lowData)");

89 shouldBeGreaterThan("sampleAlpha(lowData)", "sampleAlpha(mediumData)");	89 shouldBeGreaterThan("sampleAlpha(lowData)", "sampleAlpha(mediumData)");

90 // Skia uses mipmaps when downscaling, for both high and medium quality	90 // Skia uses mipmaps when downscaling, for both high and medium quality

91 shouldBe("sampleAlpha(mediumData)", "sampleAlpha(highData)");	91 shouldBe("sampleAlpha(mediumData)", "sampleAlpha(highData)");

92	92

93	93

94 debug("\n\nOn setting, it must be set to the new value.");	94 debug("\n\nOn setting, it must be set to the new value.");

95 evalAndLog("highContext.imageSmoothingQuality = 'medium';");	95 evalAndLog("highContext.imageSmoothingQuality = 'medium';");

96 shouldBe("highContext.imageSmoothingQuality", "'medium'");	96 shouldBe("highContext.imageSmoothingQuality", "'medium'");

97 shouldBe("scaleImageData(highCanvas, highCanvas.imageSmoothingQuality);",	97 shouldBe("scaleImageData(highCanvas, highCanvas.imageSmoothingQuality);",

98 "mediumData");	98 "mediumData");

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135 shouldBe("scaleImageData(highCanvas, highCanvas.imageSmoothingQuality);",	135 shouldBe("scaleImageData(highCanvas, highCanvas.imageSmoothingQuality);",

136 "mediumData");	136 "mediumData");

137 shouldBe("highContext.restore(); highContext.imageSmoothingQuality", "'high'");	137 shouldBe("highContext.restore(); highContext.imageSmoothingQuality", "'high'");

138 shouldBe("scaleImageData(highCanvas, highCanvas.imageSmoothingQuality);",	138 shouldBe("scaleImageData(highCanvas, highCanvas.imageSmoothingQuality);",

139 "highData");	139 "highData");

140	140

141 debug("");	141 debug("");

142 </script>	142 </script>

143 </body>	143 </body>

144 </html>	144 </html>

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