SVG Portal Application

Introduction

The SVG Portal Application (also known as "ekioh", or just "SVG") is a new feature in KreaTV 4.x. It is intended as an alternative to the standard WebKit based portal application (below called "Webkit").

Features in SVG Portal Application

The major feature set in the SVG Portal Application includes:

• XML 1.0, 1.1
• Namespaces in XML 1.0, 1.1
• XML Linking Language
• XSLT 1.0, 2.0
• CSS
• DOM level 3
• SVG DOM
• SVG Tiny 1.2
• SMIL 2.1
• The Unicode Standard
• Character Model for the World Wide Web 1.0

Configuring SVG

For STBs using an SVG portal environment, the SVG Portal Application is normally started in front when the STB boots, and restarted if ever the application should exit or be killed. There are a number of configuration objects that are used to control the behavior of the portal application. These configuration objects are described in the application configuration section .

SVG Portal Application IIP Options

The SVG Portal Application IIP (kreatv-app-ekioh-portal) supports the following options:

• startinfront
  This is a standard application option that registers the application for activation at boot. This is usually desirable if this is the main application in the configuration.
• prop(GfxMemory)
  Sets the maximum amount of graphics memory webkit shall use. This is the sum of all rendering and display buffers (see below) and an optional amount of additional pixmap memory. If the sum of the buffers below is greater than the total amount specified in GfxMemory the build will abort with an error.
• prop(DoubleBufferingEnabled)
  If set to 'true' two HD and two SD display buffers will be used resulting in better animation quality.
• prop(ShareOutputBufferEnabled)
  If set to 'true' the SD output will use the HD display buffer and the parameters SdDiplayBufferMax... is ignored.
• prop(RenderingBufferMaxWidth)
  The maximum width of the rendering buffer.
• prop(RenderingBufferMaxHeight)
  The maximum height of the rendering buffer.
• prop(HdDisplayBufferMaxWidth)
  The maximum width of the HD display buffer.
• prop(HdDisplayBufferMaxHeight)
  The maximum height of the HD diplay buffer.
• prop(SdDisplayBufferMaxWidth)
  The maximum width of the SD display buffer.
• prop(SdDisplayBufferMaxHeight)
  The maximum height of the SD diplay buffer.

SVG configuration example

A typical SVG boot image configuration file might look like this:

kreatv-app-ekioh-portal::startinfront
kreatv-app-ekioh-portal::prop(GfxMemory)=27540
kreatv-app-ekioh-portal::prop(DoubleBufferingEnabled)=true
kreatv-app-ekioh-portal::prop(ShareOutputBufferEnabled)=false
kreatv-app-ekioh-portal::prop(RenderingBufferMaxWidth)=1920
kreatv-app-ekioh-portal::prop(RenderingBufferMaxHeight)=1080
kreatv-app-ekioh-portal::prop(HdDisplayBufferMaxWidth)=1920
kreatv-app-ekioh-portal::prop(HdDisplayBufferMaxHeight)=1080
kreatv-app-ekioh-portal::prop(SdDisplayBufferMaxWidth)=720
kreatv-app-ekioh-portal::prop(SdDisplayBufferMaxHeight)=576

kreatv-option-motorola-toi
kreatv-font-kreativ

SVG aspect ratio

To preserve aspect ratio on the graphics in SVG portals there is an option to set preserveAspectRatio="none" in the svg element. This means that if the graphics is drawn with a view box having the aspect ratio of 16:9 and the tv screen has aspect ratio 4:3, the graphical content will then be stretched.

This is analogue with the behaviour of the video element but this affects the graphical content of the portal. Please also see the aspect ratio handling section in Video Element Properties.

Hardware Acceleration

Hardware acceleration can preferrebly be used in some cases. Fore example graphic animations can many times be faster using it. Please refer to the SVG Portal Application Extension document for more details regarding which operations that are hardware accelerated.

TOI/JS support in SVG Portals

See TOI/JS version 2 in SVG

Handling Input

Same as with the HTML Portal Application, see handling input.