Selective multi-sample anti-aliasing for mobile vector graphics

Abstract

Vector graphics is a key technology for drawing 2D graphics images on the mobile devices. As screen resolution increases and multi-touch interface is widely used in mobile devices, the efficient solution for vector graphics becomes more important. For future mobile environments, we should process vector graphics with high performance and low power. In this paper, we have proposed the efficient anti-aliasing algorithm for mobile vector graphics. We can have greatly reduced sample counts by selective multi-sampling, which uses multi-sampling only for the pixels which meet the contour of the image. We can find the multi-sampling pixel by simple pixel-primitive intersection test. To reduce the cost of intersection test, we have proposed the pixel block algorithm which processes adjacent pixels together. For more optimization, we use hierarchical sampling. Our optimized S-MSAA (Selective Multi-Sample Anti-Aliasing) is 29.4 times faster than the original 16× MSAA.