{"id":237,"date":"2016-07-04T23:17:50","date_gmt":"2016-07-04T22:17:50","guid":{"rendered":"https:\/\/solidt.eu\/blog\/?p=237"},"modified":"2023-05-12T10:22:01","modified_gmt":"2023-05-12T09:22:01","slug":"lua-image-sizing","status":"publish","type":"post","link":"https:\/\/solidt.eu\/site\/lua-image-sizing\/","title":{"rendered":"Lua image sizing"},"content":{"rendered":"\n<div style=\"height: 250px; position:relative; margin-bottom: 50px;\" class=\"wp-block-simple-code-block-ace\"><pre class=\"wp-block-simple-code-block-ace\" style=\"position:absolute;top:0;right:0;bottom:0;left:0\" data-mode=\"lua\" data-theme=\"monokai\" data-fontsize=\"14\" data-lines=\"Infinity\" data-showlines=\"true\" data-copy=\"false\">local ImHelper = {}\n\nfunction ImHelper.getImageSize(currentSize, maxSize, scaleUp)\n\tlocal newSize = { currentSize[1], currentSize[2] };\n\n\tlocal ratioX = maxSize[1] \/ currentSize[1];\n\tlocal ratioY = maxSize[2] \/ currentSize[2];\n\tlocal ratio = math.min(ratioX, ratioY);\n\n\tif (ratio &lt; 1.0 or scaleUp) then\t\t\t\n\t\tnewSize[1] = math.floor(currentSize[1] * ratio) or 0;\n\t\tnewSize[2] = math.floor(currentSize[2] * ratio) or 0;\n\tend\t\t\t\n\t\n\treturn newSize;\nend\n\nfunction ImHelper.getMinImageSizeToFit(currentSize, targetSize)\n\t--assert(type(currentSize) == 'table', 'Arg 1: Not a table')\n\t--assert(#currentSize == 2, 'Arg 1: Invalid size')\n\tlocal newSize = currentSize;\n\n\tlocal ratioX = targetSize[1] \/ currentSize[1];\n\tlocal ratioY = targetSize[2] \/ currentSize[2];\n\tlocal ratio = math.max(ratioX, ratioY);\n\t\n\tnewSize[1] = math.floor(currentSize[1] * ratio) or 0;\n\tnewSize[2] = math.floor(currentSize[2] * ratio) or 0;\n\t\n\treturn newSize;\nend\n\nprint( unpack(ImHelper.getImageSize({ 800, 600 }, {200, 200})) )\nprint( unpack(ImHelper.getMinImageSizeToFit({ 800, 600 }, {200, 250})) )\n<\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-237","post","type-post","status-publish","format-standard","hentry","category-lua"],"_links":{"self":[{"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/posts\/237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/comments?post=237"}],"version-history":[{"count":3,"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/posts\/237\/revisions"}],"predecessor-version":[{"id":7774,"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/posts\/237\/revisions\/7774"}],"wp:attachment":[{"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/media?parent=237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/categories?post=237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/solidt.eu\/site\/wp-json\/wp\/v2\/tags?post=237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}