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53 lines
2.0 KiB
JavaScript
53 lines
2.0 KiB
JavaScript
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/*
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eyeOS Spice Web Client
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Copyright (c) 2015 eyeOS S.L.
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Contact Jose Carlos Norte (jose@eyeos.com) for more information about this software.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU Affero General Public License version 3 as published by the
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Free Software Foundation.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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details.
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You should have received a copy of the GNU Affero General Public License
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version 3 along with this program in the file "LICENSE". If not, see
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<http://www.gnu.org/licenses/agpl-3.0.txt>.
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See www.eyeos.org for more details. All requests should be sent to licensing@eyeos.org
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The interactive user interfaces in modified source and object code versions
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of this program must display Appropriate Legal Notices, as required under
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Section 5 of the GNU Affero General Public License version 3.
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In accordance with Section 7(b) of the GNU Affero General Public License version 3,
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these Appropriate Legal Notices must retain the display of the "Powered by
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eyeos" logo and retain the original copyright notice. If the display of the
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logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
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must display the words "Powered by eyeos" and retain the original copyright notice.
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*/
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wdi.Flipper = {
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flip: function(sourceImg) {
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return this._handMadeFlip(sourceImg);
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},
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_handMadeFlip: function(sourceImg) {
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var newCanvas = document.createElement('canvas');
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newCanvas.width = sourceImg.width;
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newCanvas.height = sourceImg.height;
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var ctx = newCanvas.getContext('2d');
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ctx.save();
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// Multiply the y value by -1 to flip vertically
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ctx.scale(1, -1);
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// Start at (0, -height), which is now the bottom-left corner
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ctx.drawImage(sourceImg, 0, -sourceImg.height);
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ctx.restore();
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return newCanvas;
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}
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};
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