>From my experience this also happens with the PowerVR chips in the Droid/Milestone
On 16 Apr., 13:07, Eong <[email protected]> wrote: > If glTexImage2D is more than 100ms, glTexSubImage2D doesn't make any > sense. > I found that this will only happen on phones with snapDragon chips, > like Nexus one, Liquid and so on. > I tried a lot, can't solve it yet. > > On 2月24日, 下午5时19分, Ralf Schneider <[email protected]> wrote: > > > > > 2010/2/24 Jonathan <[email protected]> > > > > It's a 2D application, and the contents of the "screen" (as > > > represented by this internal array I'm passing around) can change at > > > any given time. I'm think I may have to use some combination of sub > > > texture updates in order to get what want and have it be smooth. > > > Uploading a 512x256 texture each frame may be too much. > > > > Any other ideas how I can speed this up? > > > You can try: glTexSubImage2D > > <http://www.khronos.org/opengles/documentation/opengles1_0/html/glTexS...>instead > > of glTexImage2D. Usually this function is the right choice to update > > textures frequently. > > > glTexSubImage2D may have the advantage to not require the OpenGL Es memory > > management system, because an existing texture (memory area) gets updated. > > > Furthermore some OpenGL ES implementation implicit convert textures to one > > of its internal formats. For example the implementation may convert all > > textures to 565 or 4444 regardless of the format you provide. > > Thus, if you provide textures in an native format the implementation could > > do a plain copy of the data, instead of a more expensive conversion. > > > ... But i have no real data available. These are just general advices > > floating in the intertubes. > > > Regards, > > Ralf > > -- > 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 > athttp://groups.google.com/group/android-developers?hl=en -- 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
