Hi, The G1 h/w doesn't support non power-of-two texture (NPOT) dimensions. However, Android's software implementation does. In order to know if a particular opengl context supports NPOT, you need to check for the npot extension string.
When the extension is not available, you have to use a bigger texture that has POT dimensions (or use several smaller textures, but that's harder). An easy way to deal with it, is to set a texture matrix which scales the texture coordinates in pixels (glScalef(1/w, 1/h, 1)), which allows you to specify the texcoord in texels. Of course, if you want to use the texture with GL_REPEAT wrapping mode, you're out of luck -- well, things get harder, you need to scale your original image to POT dimensions, and then use appropriate down- scaling to map & repeat it (exercise left to the reader [hint: use texture transformations to simplify your life]). Also, for 2D rendering, consider using the draw_texture extension (glDrawTexi), it's available on most h/w implementations and is usually faster than using geometry. Information about OpenGL and OpenGL ES extensions is available on the intertubes. Good luck! Mathias On Dec 4, 8:48 am, Guian <[EMAIL PROTECTED]> wrote: > in the OpenGL android API (android.opengl.GLUtils.texImage2D() ) > (http://code.google.com/android/reference/android/opengl/GLUtils.html > ) > we can read=> > > "Whether or not bitmap can have non power of two dimensions depends > on > the current OpenGL context." > > I load my OpenGL context using : > mEglContext = mEgl.eglCreateContext(mEglDisplay, > mEglConfig,EGL10.EGL_NO_CONTEXT, null); > > do you know what do I have to do in order to load non power of two > dimensions bitmap? --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
