Implement canvas color space IDL format for 2D canvas

third_party/WebKit/LayoutTests/fast/canvas/color-space/canvas-colorspace-arguments.html

+<script src="../../../resources/testharness.js"></script>
+<script src="../../../resources/testharnessreport.js"></script>
+
+<script>
+
+var testScenarios = [
+    ["Test CanvasColorSpace value srgb", ["srgb"], ["srgb", "8-8-8-8", false]],

[Justin Novosad, 2017/02/23 18:48:13]

Would be better to use a dictionary instead of an array for the context creation
parameters.  This would eliminate the need for the code that construct the
dictionary in runTestScenario. It would also allow you to test more cases.
Example: {} and {pixelFormat: "8-8-8-8"}

[zakerinasab, 2017/02/23 20:22:33]

Done.

+    ["Test CanvasColorSpace value rec2020", ["rec2020"],  ["srgb", "8-8-8-8", false]],
+    ["Test CanvasColorSpace value p3", ["p3"], ["srgb", "8-8-8-8", false]],
+
+    ["Test supported CanvasColorSpace and CanvasPixelFormat combination: srgb/8-8-8-8", ["srgb", "8-8-8-8"], ["srgb", "8-8-8-8", false]],
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: srgb/10-10-10-2", ["srgb", "10-10-10-2"], ["srgb", "8-8-8-8", false]],
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: srgb/12-12-12-12", ["srgb", "12-12-12-12"], ["srgb", "8-8-8-8", false]],
+    ["Test supported CanvasColorSpace and CanvasPixelFormat combination: srgb/float16", ["srgb", "float16"], ["srgb", "float16", true]],
+
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: rec2020/8-8-8-8", ["rec2020", "8-8-8-8"], ["srgb", "8-8-8-8", false]],
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: rec2020/10-10-10-2", ["rec2020", "10-10-10-2"], ["srgb", "8-8-8-8", false]],
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: rec2020/12-12-12-12", ["rec2020", "12-12-12-12"], ["srgb", "8-8-8-8", false]],
+    ["Test supported CanvasColorSpace and CanvasPixelFormat combination: rec2020/float16", ["rec2020", "float16"], ["rec2020", "float16", true]],
+
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: p3/8-8-8-8", ["p3", "8-8-8-8"], ["srgb", "8-8-8-8", false]],
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: p3/10-10-10-2", ["p3", "10-10-10-2"], ["srgb", "8-8-8-8", false]],
+    ["Test not-supported CanvasColorSpace and CanvasPixelFormat combination: p3/12-12-12-12", ["p3", "12-12-12-12"], ["srgb", "8-8-8-8", false]],
+    ["Test supported CanvasColorSpace and CanvasPixelFormat combination: p3/float16", ["p3", "float16"], ["p3", "float16", true]],
+
+    ["Test parameter linearPixelMath srgb/8-8-8-8/false", ["srgb", "8-8-8-8", false], ["srgb", "8-8-8-8", false]],
+    ["Test parameter linearPixelMath srgb/8-8-8-8/true", ["srgb", "8-8-8-8", true], ["srgb", "8-8-8-8", false]],
+    ["Test parameter linearPixelMath srgb/float16/false", ["srgb", "float16", false], ["srgb", "float16", true]],
+    ["Test parameter linearPixelMath srgb/float16/true", ["srgb", "float16", true], ["srgb", "float16", true]],
+
+    ["Test parameter linearPixelMath rec2020/float16/false", ["rec2020", "float16", false], ["rec2020", "float16", true]],
+    ["Test parameter linearPixelMath rec2020/float16/true", ["rec2020", "float16", true], ["rec2020", "float16", true]],
+
+    ["Test parameter linearPixelMath p3/float16/false", ["p3", "float16", false], ["p3", "float16", true]],
+    ["Test parameter linearPixelMath p3/float16/true", ["p3", "float16", true], ["p3", "float16", true]],
+];
+
+function runTestScenario(contextCreationParameters, expectedContextAttributes) {
+    var canvas = document. createElement('canvas');
+    var ctx;
+    switch(contextCreationParameters.length) {
+        case 1:
+            ctx = canvas.getContext('2d', {colorSpace: contextCreationParameters[0]});
+        case 2:
+            ctx = canvas.getContext('2d', {colorSpace: contextCreationParameters[0],
+                                           pixelFormat: contextCreationParameters[1]});
+        case 3:
+            ctx = canvas.getContext('2d', {colorSpace: contextCreationParameters[0],
+                                           pixelFormat: contextCreationParameters[1],
+                                           linearPixelMath: contextCreationParameters[2]});
+    }
+
+    var contextAttributes = ctx.getContextAttributes();
+    assert_equals(contextAttributes.colorSpace, expectedContextAttributes[0]);
+    assert_equals(contextAttributes.pixelFormat, expectedContextAttributes[1]);
+    assert_equals(contextAttributes.linearPixelMath, expectedContextAttributes[2]);
+}
+
+generate_tests(runTestScenario, testScenarios);
+</script>
+