Java game dvelopment smart pixel rendering

#Java game dvelopment smart pixel rendering how to

Therefore contribute significantly to overdraw. Visual effects like transparent animations,ДЇade-outs, and drop shadows all involve some sort of transparency, and can Transparent objects require existing pixels to be drawn first, so that the rightД«lending equation can occur. Unlike standard overdraw, in which the systemД¬ompletely hides existing drawn pixels by drawing opaque pixels on top of them,

Rendering of transparent pixels on screen, known as alpha rendering, is a keyД¬ontributor to overdraw.

#Java game dvelopment smart pixel rendering how to

Optimizing your view hierarchy to reduce the number of overlapping UI objects.ДЇor more information about how to accomplish this, see If you encounter this sort of issue, you may be able to improve performance by

However, doing so can degrade performance by resulting in overdraw,Д®specially in scenarios where each stacked view object is opaque, requiring theДrawing of both seen and unseen pixels to the screen. Modern layouts make it easy to stack and layer views to produce beautifulДesign. To the main background color of your app, and leave all of the containers above

Opportunity to eliminate unneeded backgrounds: You can set the window background Cases where many containers share a common background color offer another Out for any backgrounds you can eliminate because they are not visible to the To find out why you're overdrawing, walk through the hierarchy in the An unnecessary background may never be visible because it'sД¬ompletely covered by everything else the app is drawing on top of that view.ДЇor example, the system may entirely cover up a parent's background when it Removing unnecessary backgrounds is a quick way of improving rendering When layouts do have backgrounds, however, they may Remove unneeded backgrounds in layoutsД«y default, a layout does not have a background, which means it does not renderДЄnything directly by itself. This section provides information about each of these approaches. Removing unneeded backgrounds in layouts.There are several strategies you can pursue to reduce or eliminate overdraw: Provided by the GPU manufacturer helpful. In such cases, you may find a profiling tool This is because the system pushes framework messages to the background whenever Note: The Profile GPU Rendering tool does not work with apps that use the NDK. Overdraw and Process spikes, there's likely an issue with overdraw. For example, if the Debug GPU Overdraw tool shows heavy Issues other than raw numbers of pixels may also cause this That this spike happens as the GPU gets overwhelmed trying to draw pixels asДЇast as possible. The rest of the system to wait until it can catch up. As the number of pixels required toДraw a frame increases, the GPU may take longer to process new commands, and ask On less performant GPUs, available fill-rate (the speed at which the GPU canДЇill the frame buffer) can be quite low. Part of each bar, indicated in orange, shows when the system is swappingД«uffers this metric provides important clues about overdraw. Stage of the rendering pipeline takes to display a single frame. The Profile GPU Rendering tool displays, as a scrolling histogram, the time each That overdraw affects your app's performance. The higher this count, the more likely it is The Debug GPU Overdraw tool uses color-coding to show the number of times yourДЄpp draws each pixel on the screen. The platform offers the following tools to help you determine if overdraw isДЄffecting your app's performance. Optimizations avoid overdraw within your app in many cases (for example, aДЇragment background overdrawing the window background). UI thread work instead to ensure smooth app performance. Unless optimizingДЇor a known low-performance GPU device, it's recommended to focus on optimizing Their displays have plateaued at relatively low resolutions. This is because low-end devices have continued to grow in GPU performance, while Note: Overdraw is no longer as significant a problem as it was when discussed in This sequence of rendering allows the system toДЄpply proper alpha blending to translucent objects such as shadows. This is because stacked cards are rendered according to the However, the system still needs to draw even the hidden portions of the cards in For example, if we have a bunch of stacked UIД¬ards, each card hides a portion of the one below it. Overdraw refers to the system's drawing a pixel on the screen multiple times inДЄ single frame of rendering. This document explains overdraw: what it is, how to diagnose it, and actions youД¬an take to eliminate or mitigate it. That don't contribute to what the user sees on the screen. Manifests itself as a performance problem by wasting GPU time to render pixels Overdraw is usually unnecessary, and best eliminated. An app may draw the same pixel more than once within a single frame, an eventД¬alled overdraw.