Difference between revisions of "Karma/Specifications"
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* Recommended tools: TBD | * Recommended tools: TBD | ||
* Notes: TBD | * Notes: TBD | ||
| − | + | The Karma animations are created using JavScript and the Karma plugin. At this moment we haven't defined a mechanism to "export" (and "import") one animation. But copying and pasting the code (of the animation) will be enough in most cases. | |
=== Images === | === Images === | ||
| − | * Format(s): [http://en.wikipedia.org/wiki/JPEG JPEG], [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG], [http://en.wikipedia.org/wiki/Scalable_Vector_Graphics SVG] '''( | + | * Format(s): [http://en.wikipedia.org/wiki/JPEG JPEG], [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG], [http://en.wikipedia.org/wiki/Scalable_Vector_Graphics SVG] '''(Note 1, 2 and 3)''' |
| − | * Recommended tools: [http://www.adobe.com/products/illustrator/ Adobe Illustrator] (non-free), [http://www.corel.com CorelDRAW] (non-free) | + | * Recommended tools: [http://www.inkscape.org/ Inkscape], [http://www.gimp.org/ GIMP], [http://www.adobe.com/products/illustrator/ Adobe Illustrator] (non-free), [http://www.corel.com CorelDRAW] (non-free) |
| − | * Max. resolution: 1200*900 | + | * Max. resolution: 1200*900 px |
| − | * Notes: | + | * Notes: |
| + | #To handle SVG files will be necessary to create a parser svg2canvas in order to introduce them as objects inside canvas element. | ||
| + | #Animated SVG content will be hard to reproduce using canvas. | ||
| + | #SVG animations seems slow under the XO-1 (Tested with [http://raphaeljs.com/ RaphaelJS] and Browse) | ||
=== Sound === | === Sound === | ||
Revision as of 16:48, 12 August 2009
Introduction
Two main goals should be kept in mind when creating Karma lessons:
- they should be easy to adapt
- they should run on as much hardware as possibe with OLPC's XO-1 laptop representing the baseline
General Notes
Hardware constraints
Since a large percentage (if not the majority) of Karma users are envisioned to be using OLPC XO-1 laptops, netbooks, older hardware or generally relatively slow systems there are several performance constraints that need to be taken into account when designing Karma lessons.
- CPU/Memory: The baseline regarding available performance is the XO-1 laptop which comes with an AMD Geode LX 433MHz CPU and 256MB RAM (full specifications). This limits the use of high-resolution multimedia, animations and videos to some degree.
- Display: Karma lessons should work well on displays with a resolution of 1024*768 (whereby a part of the display may be taken up by browser UI elements!).
- Mass storage: Since especially the XO-1 laptop only has very limited local mass storage (1GB) lessons should be kept reasonably small.
- Connectivity: Karma lessons must not assume constant connectivity with a locally (e.g. XS) or globally available server. Support for storing data locally will be provided by Karma.
Accessibility
...
Animations
- Format(s): TBD
- Recommended tools: TBD
- Notes: TBD
The Karma animations are created using JavScript and the Karma plugin. At this moment we haven't defined a mechanism to "export" (and "import") one animation. But copying and pasting the code (of the animation) will be enough in most cases.
Images
- Format(s): JPEG, PNG, SVG (Note 1, 2 and 3)
- Recommended tools: Inkscape, GIMP, Adobe Illustrator (non-free), CorelDRAW (non-free)
- Max. resolution: 1200*900 px
- Notes:
- To handle SVG files will be necessary to create a parser svg2canvas in order to introduce them as objects inside canvas element.
- Animated SVG content will be hard to reproduce using canvas.
- SVG animations seems slow under the XO-1 (Tested with RaphaelJS and Browse)
Sound
- Format(s): OGG Vorbis
- Bit rate: TBD
- Max. size per lesson: 3~4MB
- Recommended tools: Audacity
- Notes: TBD
Video
- Format(s): TBD
- Recommended tools: TBD
- Notes: TBD
- ...