초록 ▼

A method and apparatus for performing graphic compositing operations in a computer system, with improved system performance, is provided. The apparatus and method performs the plurality of compositing operations by implementing a series of write functions, selected from a group of write functions, i

A method and apparatus for performing graphic compositing operations in a computer system, with improved system performance, is provided. The apparatus and method performs the plurality of compositing operations by implementing a series of write functions, selected from a group of write functions, in a predetermined combination or order.

대표청구항 ▼

Apparatus for displaying a composite graphic image which is a composite of first and second input graphic images, each of said composite, and first and second input, graphic images being represented by at least one respective set of digital data, said composite graphic image representing the result

Apparatus for displaying a composite graphic image which is a composite of first and second input graphic images, each of said composite, and first and second input, graphic images being represented by at least one respective set of digital data, said composite graphic image representing the result of a selected one of a first group of compositing operations on said sets of digital data representing said first and second input images, wherein at least one of said first group of compositing operations includes at least three operands, said apparatus comprising: first means for storing said digital data representing said first input graphic image; second means for storing said digital data representing said second input graphic image; operator means in data transfer relationship with said first and second storing means for implementing at least one of a second group of operations on digital data stored in said first and second storing means, and for storing a result of said second operation in said second storing means in substitution for said digital data stored in said second storing means, said at least one second operation selected from the group including the operations SD, S+D, (1-S)D, and S+D-SD, where S and D respectively represent the values of digital data stored in said first and second storing means; processor means in controlling relationship with said operator means, said processor means performing said selected one of said first group of compositing operations by causing said operator means to perform a predetermined sequence of one or more of said second group of operations to produce said set of digital data representing said composite graphic image in said second storing means; and means for converting said set of composite graphic image digital data into signals for display of said composite graphic image.