Hello! I'm developing a Live Wallpaper and am currently looking into optimizing the drawing part. I have a precalculated int[] of colors and need to deliver this to the screen. The fastest way I have found up to now is this:
int[] pixels = new int[surfaceWidth * surfaceHeight]; IntBuffer pixelBuffer = IntBuffer.wrap(pixels); bitmap = Bitmap.createBitmap(surfaceWidth, surfaceHeight, Config.ARGB_8888); // when updates to "pixels" are done, I just blit it to the canvas like this: canvas = getSurfaceHolder().lockCanvas(); bitmap.copyPixelsFromBuffer(pixelBuffer); canvas.drawBitmap(mBitmap, 0, 0, null); holder.unlockCanvasAndPost(c); The extra intermediate copying onto the bitmap seems redundant and I was hoping to get rid of it. Canvas.drawBitmap(int[], ...) looks on the surface to do the trick but is surprisingly a few ms slower. Digging into the source code reveals that it also makes a complete copy of the data onto a Bitmap before drawing. I have tried updating the Bitmap directly but it has proven much slower due to the many method calls needed. Is there a faster way to get the int[] onto the surface? Thanks, apan -- 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 To unsubscribe, reply using "remove me" as the subject.
