The release of Adobe Muse CC 7.0, which was announced on November 13th, includes many features and improvements. This article describes some of the output improvements, which continue the trend described in Muse 5 Code Improvements and IE7, Code Improvements in Muse 4, and earlier posts. Adobe Muse CC 7.0 includes improvements to images, changes to produce consistent leading across browsers, and a mechanism for developers to build and share their own service based widgets that inject code into the website. These widgets are built using the MuCow (Muse Configurable Options Widget) SDK and were the foundation for the social widgets shipped with Adobe Muse CC version 7.
Adobe Muse CC 7.0 uses a Bicubic Sharper algorithm to produce higher quality images when resampling is required due to resizing an image smaller. Earlier versions used a more generic Bicubic algorithm. The difference between the two algorithms can be seen in the following images exported from different versions of Adobe Muse CC.
New Site Properties
Adobe Muse CC 7.0 includes two new site properties: one for controlling whether it automatically converts images imported as PNG to JPEG if the image does not contain transparency; one for improving the consistency of leading across browsers.
Two popular formats for image encoding are JPEG and PNG. PNG images support transparency and are typically significantly larger (typically somewhere between 2 and 10 times larger) on disk than JPEG compressed images. Therefore, if the image does not include any native transparency, load performance may be significantly improved by using JPEG instead of PNG.
Consistent Leading Across Browsers
The new site property ‘Round Leading to a Whole Number’ has been added to improve the consistency of leading across browsers. With this feature when line-height is specified as a percentage of font size (e.g., 120% of 14px), the calculated value (e.g., 16.8px) will now be rounded to a whole number (e.g., 17px). Leading and text frame height are more consistent across browsers when line-height is rounded.
Internet Explorer 7 and 64-bit Muse
Adobe Muse CC is also in the process of transitioning from an AIR runtime to a 64-bit native application allowing for improved performance and user interface. The native version of Muse is expected to release in the first half of 2014 and will require 64-bit hardware to run.