PNG Optimization

[Michael Lobko-Lobanovsky]

The gem stone animation is one of the biggest i have, 30000×500 pixels in 32-bit, go figure.

Patrice,

Are you aware of quite a number of SW packages around that could optimize your PNGs efficiently while preserving their alphas where available? And in many cases you might even resort to lossy recompression.

[Patrice Terrier]

Mike--

Thank you very much for the link, i shall try it.

While very interresting to produce smaller disk file, that won't change anything when loaded in memory, because then everything must be turned into 32-bit DIB or standard BITMAP.

[Michael Lobko-Lobanovsky]

... that won't change anything when loaded in memory ...

That's correct, and the problem seems to have no solution in programmatic user space.

However both DX and OpenGL support a number of image formats (including DDS/DXT) that allow for on-the-fly decompression on the GPU hardware only when the respective texture is needed for a particular render pass.