SH7764 Datasheet, PDF (1124/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 23 G2D
23.1.2 Basic Functions
(1) Features
• On-chip geometry engine for coordinate transformation
Hardware that performs coordinate transformation (4 × 4 matrix operation + Z clipping +
perspective W division) for the input vertex
• Extended 2D functions
High-functional bold line drawing, antialias line drawing, and BITBLT type commands with
ROP/alpha blending
• Upgraded control command functions
Two command systems: GOSUB/RET and INT command, and upgraded WPR and TRAP
command functions
• Upper compatibility with Q2SD on a functional level
(2) 4 × 4 Matrix Operation
A 4 × 4 matrix is used to transform the input vertex. Setting the coordinate transformation enable
bit (GTE) in the coordinate transformation control register (GTRCR) to 1 and then setting the
rendering attribute MTRE bit of each command to 1 executes matrix operation for the input
vertex.
Generally, the following matrix equation is used for transforming the coordinates of the input
vertex.
Rev. 1.00 Nov. 22, 2007 Page 1068 of 1692
REJ09B0360-0100