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Diffstat (limited to 'layout/reftests/font-matching/descriptor-ranges.js')
| -rw-r--r-- | layout/reftests/font-matching/descriptor-ranges.js | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/layout/reftests/font-matching/descriptor-ranges.js b/layout/reftests/font-matching/descriptor-ranges.js new file mode 100644 index 0000000000..e59bd0d45c --- /dev/null +++ b/layout/reftests/font-matching/descriptor-ranges.js @@ -0,0 +1,79 @@ +/* Script used by descriptor-ranges.html and descriptor-ranges-ref.html + to create @font-face rules and test elements for a collection of + font-matching testcases. */ + +// To create unique font-family names for each testcase. +let serial = 0; + +// Accumulators for the lists of @font-face rules and test elements. +let fontFaceRules = ""; +let testElements = ""; + +// Create a <div> element with the font properties to match. Its text reports +// the property-value and corresponding pair of descriptors being tested. +// (The associated createFontFaceRules() function is defined separately in the +// test and reference files.) +function createTestElement(family, weight, style, stretch, value, expected, unexpected) { + return `<div style="font-family:${family}; font-weight:${weight}; font-style:${style}; font-stretch:${stretch};">` + + `${family} ${value} (${expected} vs ${unexpected})</div>\n`; +} + +// Create testcases for the given descriptor. +// Each testcase has a test property value, and a list of @font-face descriptors +// to be matched against the property, where each descriptor in the list should +// be preferred over the next. +function testDescriptor(descriptorName, testCases) { + testElements += `<div style="background:yellow;padding:0.5em">Tests of ${descriptorName} descriptor:</div>\n`; + testCases.forEach(function (testCase) { + // Go though test cases, checking each descriptor has higher priority than next in the list + for (let i = 0; i < testCase.testDescriptors.length - 1; i++) { + serial++; + let expectedMatch = testCase.testDescriptors[i]; + let unexpectedMatch = testCase.testDescriptors[i + 1]; + let familyName = "test_" + serial; + fontFaceRules += createFontFaceRules(familyName, descriptorName, expectedMatch, unexpectedMatch); + let testWeight = (descriptorName == "font-weight") ? testCase.value : "normal"; + let testStyle = (descriptorName == "font-style") ? testCase.value : "normal"; + let testStretch = (descriptorName == "font-stretch") ? testCase.value : "normal"; + testElements += createTestElement(familyName, testWeight, testStyle, testStretch, + testCase.value, expectedMatch, unexpectedMatch); + } + }); +} + +// Testcases (from web-platform/tests/css/css-fonts/variations/at-font-face-font-matching.html, +// with a couple of extras). In each case, for the given property value, the testDescriptors +// are listed from 'best' to 'worse' match, as evaluated by the font-matching algorithm in +// https://drafts.csswg.org/css-fonts-4/#font-style-matching. +testDescriptor("font-weight", [ + { value: "400", testDescriptors: ["400", "450 460", "500", "350 399", "351 398", "501 550", "502 560"] }, + { value: "430", testDescriptors: ["420 440", "450 460", "500", "400 425", "350 399", "340 398", "501 550", "502 560"] }, + { value: "500", testDescriptors: ["500", "450 460", "400", "350 399", "351 398", "501 550", "502 560"] }, + { value: "501", testDescriptors: ["501", "502 510", "503 520", "500", "450 460", "390 410", "300 350"] }, + { value: "399", testDescriptors: ["350 399", "340 360", "200 300", "400", "450 460", "500 501", "502 510"] }, + { value: "350", testDescriptors: ["200 300", "250 280", "420 450", "430 440", "445"] }, + { value: "550", testDescriptors: ["600 800", "700 900", "420 450", "430 440", "425"] } +]); + +testDescriptor("font-stretch", [ + { value: "100%", testDescriptors: ["100%", "110% 120%", "115% 116%"] }, + { value: "110%", testDescriptors: ["110% 120%", "115% 116%", "105%", "100%", "50% 80%", "60% 70%"] }, + { value: "90%", testDescriptors: ["90% 100%", "50% 80%", "60% 70%", "110% 140%", "120% 130%"] }, +]); + +testDescriptor("font-style", [ + { value: "normal", testDescriptors: ["normal", "oblique 0deg", "oblique 10deg 40deg", "oblique 20deg 30deg", "oblique -50deg -20deg", "oblique -40deg -30deg" ] }, + { value: "italic", testDescriptors: ["italic", "oblique 20deg", "oblique 30deg 60deg", "oblique 40deg 50deg", "oblique 5deg 10deg", "oblique 5deg", "normal", "oblique 0deg", "oblique -60deg -30deg", "oblique -50deg -40deg" ] }, + { value: "oblique 20deg", testDescriptors: ["oblique 20deg", "oblique 30deg 60deg", "oblique 40deg 50deg", "oblique 10deg", "italic", "oblique 0deg", "oblique -50deg -20deg", "oblique -40deg -30deg" ] }, + { value: "oblique 21deg", testDescriptors: ["oblique 21deg", "oblique 30deg 60deg", "oblique 40deg 50deg", "oblique 20deg", "oblique 10deg", "italic", "oblique 0deg", "oblique -50deg -20deg", "oblique -40deg -30deg" ] }, + { value: "oblique 10deg", testDescriptors: ["oblique 10deg", "oblique 5deg", "oblique 15deg 20deg", "oblique 30deg 60deg", "oblique 40deg 50deg", "italic", "oblique 0deg", "oblique -50deg -20deg", "oblique -40deg -30deg" ] }, + { value: "oblique 0deg", testDescriptors: ["oblique 0deg", "oblique 5deg", "oblique 15deg 20deg", "oblique 30deg 60deg", "oblique 40deg 50deg", "italic", "oblique -50deg -20deg", "oblique -40deg -30deg" ] }, + { value: "oblique -10deg", testDescriptors: ["oblique -10deg", "oblique -5deg", "oblique -1deg 0deg", "oblique -20deg -15deg", "oblique -60deg -30deg", "oblique -50deg -40deg", "italic", "oblique 0deg 10deg", "oblique 40deg 50deg" ] }, + { value: "oblique -20deg", testDescriptors: ["oblique -20deg", "oblique -60deg -40deg", "oblique -10deg", "italic", "oblique 0deg", "oblique 30deg 60deg", "oblique 40deg 50deg"] }, + { value: "oblique -21deg", testDescriptors: ["oblique -21deg", "oblique -60deg -40deg", "oblique -10deg", "italic", "oblique 0deg", "oblique 30deg 60deg", "oblique 40deg 50deg"] }, +]); + +// Stuff the @font-face rules and test elements into the document. +// Any testcases that render Ahem glyphs are failures. +document.getElementById("dynamicStyles").innerHTML = fontFaceRules; +document.getElementById("testContents").innerHTML = testElements; |