On Wed, Apr 18, 2012 at 03:28:11PM -0700, Streets Of Boston wrote: > The size of the JPG/PNG file has almost nothing to do with the size of the > corresponding image in memory.
Hopefully those who HAVE been saying that will read this. > An RGB_565 takes 2 bytes per pixel (5+6+5=16bits=2bytes). Yes, but you lose color detail...again, that goes directly against the entire objective of my app. For the "goofy" stuff, sure, RGB_565 is fine. But for photographic filters (solid color, graduated, split-field, fog, diffusion, etc. And given their semi-transparency, RGB_565 definitely isn't a fit for those bitmaps (which don't need to be full-sized until saving the photos with filters, and then there's only one bitmap with all of the combined filters).). > An ARGB_8888 takes 4 bytes per pixel. This means a 5MPixel image will > take 5M*2 = 10MByte in RAM when using RGB_565 or 5M*4=20MByte in RAM > when using ARGB_8888. Hmm, here's a thought...is there a bitmap type that I missed, that has alpha values like ARGB_8888, but only uses 16-bit color? Those definitely don't need 24-bit color---only the actual photo needs 24-bit. > I have an image editor in the market and I managed to process full-sized > images, reverting back to RGB_565 when necessary. > My image editor only applies *linear *filters. I.e. filters that modify > every pixel in an image the same way, regardless of the pixel's position or > its neighbors. This allows my app to chop up large images into smaller ones > and deal with the smaller ones one by one. If not, i would need, at some > point in time 2 copies of the image: The original and the modified. Can you point me to the right docs, tutorials, etc., to work out how to do that? Thanks, --jim -- THE SCORE: ME: 2 CANCER: 0 73 DE N5IAL (/4) | "My spell checker eloped with a wiccan [email protected] | and I've not seen it since!" < Running FreeBSD 7.0 > | ICBM / Hurricane: | (from news.admin.net-abuse.email) 30.44406N 86.59909W | Android Apps Listing at http://www.jstrack.org/barcodes.html -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
