Decoder library

[spillerrec]

Develop a proper decoding library, and focus on great speed and memory consumtion. This is to make it easier to include it in applications and game engines.

Requiriments:

• No dependency on Qt
• Fast loading of just a single image
• Support holding it in memory for fast drawing of several images.
• Mode for reading only thumbnail + metadata (still missing)

Wanted:

• LGPL if possible
• No hard dependencies on file formats, support disabling for example FLIF.
• Parallel decoding of needed images
• Parallel rendering?
• SIMD for SPEED.
• OpenGL compatible buffers?
• Control of when images get decoded, i.e. delaying decoding until needed to reduce memory usage.
• Repacking for modifying metadata
• Access to the raw images, so we can create an evaluator

Other points of interest:

• Support a different format than ZIP which allows fast seeking. FxSF is being developed for this.
• Investigate different overlay methods for rendering speed. (1bit alpha might be more efficient)