88 lines
3.2 KiB
JavaScript
88 lines
3.2 KiB
JavaScript
/*
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Load the image module.
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*/
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Ox.load('Image', function() {
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/*
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Load a sample image (which has its own entry in
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<a href="see http://en.wikipedia.org/wiki/Lenna">Wikipedia</a>).
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*/
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Ox.Image('png/lenna256.png', function(image) {
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/*
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Create some DOM elements.
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*/
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var $body = Ox.$('body'),
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$select = Ox.$('<select>').on({change: change}).appendTo($body),
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$image = Ox.$('<img>').attr({src: image.src()}).appendTo($body);
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[
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'Method...', 'src("png/lenna256.png")',
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'blur(2)', 'blur(4)',
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'channel("r")', 'channel("g")', 'channel("b")',
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'channel("h")', 'channel("s")', 'channel("l")',
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'contour()',
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'depth(1)', 'depth(2)', 'depth(4)',
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'drawCircle([128, 128], 64, {"fill": "rgba(0, 0, 0, 0.5)"})',
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'drawLine([[64, 64], [192, 192]], {"color": "green", "width": 2})',
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'drawPath([[64, 64], [192, 64], [64, 192]], {"close": true})',
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'drawRectangle([64, 64], [128, 128], {"fill": "red", "width": 0})',
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'drawText("?", [16, 240], {"color": "blue", "font": "64px Arial"})',
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'edges()', 'emboss()',
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'encode("secret")', 'decode()',
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'encode("secret", false)', 'decode(false)',
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'encode("secret", 1)', 'decode(1)',
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'encode("secret", false, 15)', 'decode(false, 15)',
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'encode("secret", 127)', 'decode(127)',
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'filter([0, 1, 0, 1, -2, 1, 0, 1, 0])',
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'hue(-60)', 'hue(60)',
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'invert()',
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'lightness(-0.5)', 'lightness(0.5)',
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'map(function(v, xy) { return Ox.sum(xy) % 2 ? [0, 0, 0] : v; })',
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'mosaic(4)', 'motionBlur()',
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'photocopy()', 'pixel([16, 16], [255, 255, 255])', 'posterize()',
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'saturation(-0.5)', 'saturation(0.5)',
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'sharpen()', 'solarize()'
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].forEach(function(method) {
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Ox.$('<option>').html(method).appendTo($select);
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});
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function change() {
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var value = $select.val(),
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match = value.match(/^(\w+)\((.*?)\)$/),
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fn = match[1], args;
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/*
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The `map` method takes a function as its argument, which we can't
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`JSON.parse`, but have to `eval`.
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*/
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try {
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args = JSON.parse('[' + match[2] + ']');
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} catch(e) {
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args = [eval('f = ' + match[2])];
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}
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/*
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The `src` and `encode` methods are asynchronous and take a callback
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function.
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*/
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if (fn == 'src' || fn == 'encode') {
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image[fn].apply(null, args.concat(function(image) {
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$image.attr({src: image.src()});
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}));
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/*
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The `decode` method is asynchronous too, and its callback function
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gets passed a string.
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*/
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} else if (fn == 'decode') {
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image[fn].apply(null, args.concat(alert));
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/*
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All other methods simply return the image.
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*/
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} else {
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$image.attr({src: image[fn].apply(null, args).src()});
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}
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$select.val('Method...');
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}
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});
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});
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