But that seems to be the only way to tell the system that it can ignore the alpha channel. Bitmap.hasAlpha() just returns the flag.
I am updating the bitmap a lot with copyPixelsFromBuffer so how do I tell the system that it can ignore the alpha channel? On Jan 24, 9:49 pm, Romain Guy <[email protected]> wrote: > No you cannot. Methods marked @hide are not part of the public API. They are > not present in ADT's android.jar so you cannot compile against it. We also > might rename or remove such APIs at any point in the future. > > > > > > On Mon, Jan 24, 2011 at 12:42 PM, webmonkey <[email protected]> wrote: > > Ah thanks, I just checked the Android source and there is the > > following function > > > public void setHasAlpha(boolean hasAlpha) { > > nativeSetHasAlpha(mNativeBitmap, hasAlpha); > > } > > > But it is set to @hide so it is not in the docs, can we use this > > function? > > > On Jan 24, 6:14 pm, Romain Guy <[email protected]> wrote: > > > The system can detect when a ARGB_8888 bitmap is opaque (see > > > Bitmap.hasAlpha()). > > > > On Mon, Jan 24, 2011 at 8:26 AM, webmonkey <[email protected]> > > wrote: > > > > Now that Gingerbread has moved to 32-bit windows is there a way to > > > > create a 32-bit bitmap without alpha to improve drawing performance of > > > > opaque bitmaps? > > > > > Something like Bitmap.createBitmap( 512, 512, > > > > Bitmap.Config.XRGB_8888 ) > > > > > Or does the system somehow detect that the bitmap is opaque? > > > > > -- > > > > 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]<android-developers%2Bunsubs > > > > [email protected]><android-developers%2Bunsubs > > [email protected]> > > > > For more options, visit this group at > > > >http://groups.google.com/group/android-developers?hl=en > > > > -- > > > Romain Guy > > > Android framework engineer > > > [email protected] > > > > Note: please don't send private questions to me, as I don't have time to > > > provide private support. All such questions should be posted on public > > > forums, where I and others can see and answer them > > > -- > > 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]<android-developers%2Bunsubs > > [email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > Romain Guy > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support. All such questions should be posted on public > forums, where I and others can see and answer them -- 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
