Add ability to export rendering to JPG or PNG with smart object support

[jakeleventhal]

After adding an image to a smart object layer, you should be able to render an image that can be both rendered in the browser as well as downloaded directly to the machine as a JPG/PNG. The rendering should ensure that all layers/shadows/etc. are properly rendered. Most importantly, this should be able to function strictly in the browser.

For example, screenshot 1 shows a PSD with a smart object for the art inside the frame.

Screenshot 2 shows a PSD with an image (the cherries) added in the frame. You will notice that the lighting and shadows from the lamp are clearly rendered.

[jakeleventhal]

Related:

• After updating smart object data, I can't render whole psd. #147
• Render after updating smart object #138 (comment)
• How to export a psd to png or jpg ? #177

[Agamnentzar]

This library is intended for reading and writing PSD file contents, it's not intended to be fully featured rendering engine of Photoshop.