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Diffstat (limited to 'layout/reftests/svg/image/util.js')
| -rw-r--r-- | layout/reftests/svg/image/util.js | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/layout/reftests/svg/image/util.js b/layout/reftests/svg/image/util.js new file mode 100644 index 0000000000..144edd356a --- /dev/null +++ b/layout/reftests/svg/image/util.js @@ -0,0 +1,173 @@ +/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// The possible values of the "align" component of preserveAspectRatio. +const ALIGN_VALS = ["none", + "xMinYMin", "xMinYMid", "xMinYMax", + "xMidYMin", "xMidYMid", "xMidYMax", + "xMaxYMin", "xMaxYMid", "xMaxYMax"]; + +// The possible values of the "meetOrSlice" component of preserveAspectRatio. +const MEETORSLICE_VALS = [ "meet", "slice" ]; + +const SVGNS = "http://www.w3.org/2000/svg"; +const XLINKNS = "http://www.w3.org/1999/xlink"; + +// This is the separation between the x & y values of each <image> in a +// generated grid. +const IMAGE_OFFSET = 50; + +function generateBorderRect(aX, aY, aWidth, aHeight) { + var rect = document.createElementNS(SVGNS, "rect"); + rect.setAttribute("x", aX); + rect.setAttribute("y", aY); + rect.setAttribute("width", aWidth); + rect.setAttribute("height", aHeight); + rect.setAttribute("fill", "none"); + rect.setAttribute("stroke", "black"); + rect.setAttribute("stroke-width", "2"); + rect.setAttribute("stroke-dasharray", "3 2"); + return rect; +} + +// Returns an SVG <image> element with the given xlink:href, width, height, +// and preserveAspectRatio=[aAlign aMeetOrSlice] attributes +function generateImageElementForParams(aX, aY, aWidth, aHeight, + aHref, aAlign, aMeetOrSlice) { + var image = document.createElementNS(SVGNS, "image"); + image.setAttribute("x", aX); + image.setAttribute("y", aY); + image.setAttribute("width", aWidth); + image.setAttribute("height", aHeight); + image.setAttributeNS(XLINKNS, "href", aHref); + image.setAttribute("preserveAspectRatio", aAlign + " " + aMeetOrSlice); + return image; +} + +// Returns a <g> element filled with a grid of <image> elements which each +// have the specified aWidth & aHeight and which use all possible values of +// preserveAspectRatio. +// +// The final "aBonusPARVal" argument (if specified) is used as the +// preserveAspectRatio value on a bonus <image> element, added at the end. +function generateImageGrid(aHref, aWidth, aHeight, aBonusPARVal) { + var grid = document.createElementNS(SVGNS, "g"); + var y = 0; + var x = 0; + for (var i = 0; i < ALIGN_VALS.length; i++) { + // Jump to next line of grid, for every other "i" value. + // (every fourth entry) + if (i && i % 2 == 0) { + y += IMAGE_OFFSET; + x = 0; + } + var alignVal = ALIGN_VALS[i]; + for (var j = 0; j < MEETORSLICE_VALS.length; j++) { + var meetorsliceVal = MEETORSLICE_VALS[j]; + var border = generateBorderRect(x, y, aWidth, aHeight); + var image = generateImageElementForParams(x, y, aWidth, aHeight, + aHref, alignVal, + meetorsliceVal); + grid.appendChild(border); + grid.appendChild(image); + x += IMAGE_OFFSET; + } + } + + if (aBonusPARVal) { + // Add one final entry with "bonus" pAR value. + y += IMAGE_OFFSET; + x = 0; + var border = generateBorderRect(x, y, aWidth, aHeight); + var image = generateImageElementForParams(x, y, aWidth, aHeight, + aHref, aBonusPARVal, ""); + grid.appendChild(border); + grid.appendChild(image); + } + + return grid; +} + +// Returns an SVG <symbol> element that... +// (a) has the given ID +// (b) contains only a <use> element to the given URI +// (c) has a hardcoded viewBox="0 0 10 10" attribute +// (d) has the given preserveAspectRatio=[aAlign aMeetOrSlice] attribute +function generateSymbolElementForParams(aSymbolID, aHref, + aAlign, aMeetOrSlice) { + var use = document.createElementNS(SVGNS, "use"); + use.setAttributeNS(XLINKNS, "href", aHref); + + var symbol = document.createElementNS(SVGNS, "symbol"); + symbol.setAttribute("id", aSymbolID); + symbol.setAttribute("viewBox", "0 0 10 10"); + symbol.setAttribute("preserveAspectRatio", aAlign + " " + aMeetOrSlice); + + symbol.appendChild(use); + return symbol; +} + +function generateUseElementForParams(aTargetURI, aX, aY, aWidth, aHeight) { + var use = document.createElementNS(SVGNS, "use"); + use.setAttributeNS(XLINKNS, "href", aTargetURI); + use.setAttribute("x", aX); + use.setAttribute("y", aY); + use.setAttribute("width", aWidth); + use.setAttribute("height", aHeight); + return use; +} + +// Returns a <g> element filled with a grid of <use> elements which each +// have the specified aWidth & aHeight and which reference <symbol> elements +// with all possible values of preserveAspectRatio. Each <symbol> contains +// a <use> that links to the given URI, aHref. +// +// The final "aBonusPARVal" argument (if specified) is used as the +// preserveAspectRatio value on a bonus <symbol> element, added at the end. +function generateSymbolGrid(aHref, aWidth, aHeight, aBonusPARVal) { + var grid = document.createElementNS(SVGNS, "g"); + var y = 0; + var x = 0; + for (var i = 0; i < ALIGN_VALS.length; i++) { + // Jump to next line of grid, for every other "i" value. + // (every fourth entry) + if (i && i % 2 == 0) { + y += IMAGE_OFFSET; + x = 0; + } + var alignVal = ALIGN_VALS[i]; + for (var j = 0; j < MEETORSLICE_VALS.length; j++) { + var meetorsliceVal = MEETORSLICE_VALS[j]; + var border = generateBorderRect(x, y, aWidth, aHeight); + + var symbolID = "symbol_" + alignVal + "_" + meetorsliceVal; + var symbol = generateSymbolElementForParams(symbolID, aHref, + alignVal, meetorsliceVal); + var use = generateUseElementForParams("#" + symbolID, + x, y, aWidth, aHeight); + grid.appendChild(symbol); // This isn't painted + grid.appendChild(border); + grid.appendChild(use); + x += IMAGE_OFFSET; + } + } + + if (aBonusPARVal) { + // Add one final entry with "bonus" pAR value. + y += IMAGE_OFFSET; + x = 0; + var border = generateBorderRect(x, y, aWidth, aHeight); + var symbolID = "symbol_Bonus"; + var symbol = generateSymbolElementForParams(symbolID, aHref, + aBonusPARVal, ""); + var use = generateUseElementForParams("#" + symbolID, + x, y, aWidth, aHeight); + grid.appendChild(symbol); // This isn't painted + grid.appendChild(border); + grid.appendChild(use); + } + + return grid; +} |