ignore calculating scale if only possible outcome is 1
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1 changed files with 22 additions and 18 deletions
40
js/reveal.js
40
js/reveal.js
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@ -125,13 +125,13 @@
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theme: null,
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// Transition style
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transition: 'slide', // none/fade/slide/convex/concave/zoom
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transition: 'default', // none/fade/slide/convex/concave/zoom
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// Transition speed
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transitionSpeed: 'default', // default/fast/slow
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// Transition style for full page slide backgrounds
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backgroundTransition: 'slide', // none/fade/slide/convex/concave/zoom
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backgroundTransition: 'default', // none/fade/slide/convex/concave/zoom
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// Parallax background image
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parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg"
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@ -1469,24 +1469,28 @@
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dom.slides.style.width = size.width + 'px';
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dom.slides.style.height = size.height + 'px';
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// Determine scale of content to fit within available space
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scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
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// No point in calculating scale if the only possible
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// result is 1
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if( config.minScale !== 1 || config.maxScale !== 1 ) {
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// Determine scale of content to fit within available space
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scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
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// Respect max/min scale settings
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scale = Math.max( scale, config.minScale );
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scale = Math.min( scale, config.maxScale );
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// Respect max/min scale settings
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scale = Math.max( scale, config.minScale );
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scale = Math.min( scale, config.maxScale );
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// Prefer zooming in desktop Chrome so that content remains crisp
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if( !isMobileDevice && /chrome/i.test( navigator.userAgent ) && typeof dom.slides.style.zoom !== 'undefined' ) {
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dom.slides.style.zoom = scale;
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}
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// Apply scale transform as a fallback
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else {
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dom.slides.style.left = '50%';
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dom.slides.style.top = '50%';
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dom.slides.style.bottom = 'auto';
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dom.slides.style.right = 'auto';
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transformElement( dom.slides, 'translate(-50%, -50%) scale('+ scale +')' );
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// Prefer zooming in desktop Chrome so that content remains crisp
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if( !isMobileDevice && /chrome/i.test( navigator.userAgent ) && typeof dom.slides.style.zoom !== 'undefined' ) {
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dom.slides.style.zoom = scale;
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}
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// Apply scale transform as a fallback
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else {
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dom.slides.style.left = '50%';
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dom.slides.style.top = '50%';
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dom.slides.style.bottom = 'auto';
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dom.slides.style.right = 'auto';
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transformElement( dom.slides, 'translate(-50%, -50%) scale('+ scale +')' );
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}
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}
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// Select all slides, vertical and horizontal
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