| 摘要 |
PROBLEM TO BE SOLVED: To attain display of a video window in a form of boring it according to the optional shape and anti-aliasing processing of a window periphery edge, etc. in a three-dimensional image processor having a drawing means by which texture mapping using texture data stored in a texture memory is performed. SOLUTION: Video data in the texture memory is automatically updated by a frame frequency of the video data by switching of a double buffer. The video data (an RGB value) in the texture memory is read by a three-dimensional drawing device and mapped to polygons. Here, a rectangle three-dimensional image is formed by two triangle polygons. Key data (anαvalue) in the texture memory is read by the three-dimensional drawing device and by which transparency of the polygons is controlled. Namely, the shape of the video window is determined by theαvalue. COPYRIGHT: (C)2007,JPO&INPIT |
