| 摘要 |
PROBLEM TO BE SOLVED: To correctly plot an image containing a translucent part. SOLUTION: A plotting mode executed when a condition of an alpha test is not satisfied is set by a CPU from plural plotting modes according to the selection of a user. An alpha test circuit 51 compares an alpha data value of an image with a constant. And, it is judged whether or not the comparison result agrees with the condition, and as a result of the judgement, when it is judged that the comparison result did not agree with the condition, the alpha test circuit 51 executes the plotting process corresponding to the set plotting mode. |
