公开(公告)号：US09251607B1

公开(公告)日：2016-02-02

申请号：US13675843

申请日：2012-11-13

Applicant: Google Inc.

Inventor： Philip S. Milne ,  Chet Haase ,  Gilles Debunne

IPC: G06T11/20

CPC classification number: G06T11/203

Abstract: Mechanisms for more efficiently and accurately performing anti-aliasing techniques. A bounding box for a line can be generated that includes both a central region of the line and one or more boundary regions that have various levels of opacity. Vertices for the bounding box can be provided to any of a variety of appropriate entities to interpolate pixel locations within the bounding box and to determine various levels of opacity for pixels, such as vertex shaders and/or pixel shaders. Various techniques can be used to determine a pixel's membership value within one or more of the boundary regions of a bounding box, such as using a distance from an edge of a central region to a center of the pixel and/or an area of the pixel that is located inside the boundary region.

Abstract translation: 更有效和准确地执行抗锯齿技术的机制。 可以生成线的边界框，其包括线的中心区域和具有各种不透明度级别的一个或多个边界区域。 边界框的顶点可以被提供给各种适当的实体中的任何一个来内插边界框内的像素位置，并且确定诸如顶点着色器和/或像素着色器之类的像素的不透明度水平。 可以使用各种技术来确定边界框的一个或多个边界区域内的像素的隶属度值，例如使用从中心区域的边缘到像素的中心的距离和/或像素的区域 位于边界区域内。