| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drawing device in which data amount of data to be stored in a main memory is reduced, so that a required mipmap image at a mipmap level is generated and drawn on a polygon image without the band congestion of the main memory connected to the drawing device, even when a texture which is a moving image is used. <P>SOLUTION: The drawing device according to the present invention includes: a wavelet transform unit for transforming an original image into wavelet coefficients using a Harr wavelet transform formula; a level obtaining unit for obtaining a mipmap level of a mipmap image; an inverse wavelet transform unit for receiving at least a portion of the wavelet coefficients, to an inverse transform until an order having a value equal to the mipmap level is obtained, and outputting an image represented by at least a portion of a low-frequency component of wavelet coefficients having the order having the value equal to the mipmap level; and a polygon drawing unit for drawing the image output by the inverse wavelet transform unit, as a mipmap image, on the polygon image. <P>COPYRIGHT: (C)2008,JPO&INPIT |
