Optimized on-screen video composition for mobile device

摘要

A method for displaying continuous video content on a mobile phone LCD renders plural source video textures as consecutive surfaces on the display. A hardware scaler, rather than a general purpose graphical processing unit (GPU), is used to render a particular surface whenever possible, because it uses less battery power than the GPU. The method determines if the hardware scaler is capable of rendering a particular surface and if the particular surface is to be rendered with one or more additional images derived from a source other than a source video texture. The hardware scaler renders surfaces, including any additional images, if it is capable of doing so; otherwise the GPU renders the surface. The method is applied dynamically to each video texture in a video session, so that the manner of rendering each surface, whether by using the hardware scaler or the GPU, can change from surface to surface.