SH7205 Datasheet, PDF (1467/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 26 2D Graphics Engine (2DG)
Integer part of the results of calculation
of the phase in the vertical starting position
on the source side
Fractional part of the results of calculation
of the phase in the vertical starting position
on the source side
V1PHS_DCML, V1PHS_INTGR
Source area (source side)
Partial
extraction area
(before resizing)
Full source area
(before resizing)
Vertical height of
source area
SSHIGH
(number of lines)
Note: The processing for the right or lower edge
by the blitter should be set by the EDGE bits.
Integer part of the results of calculation
of the phase in the horizontal starting position
on the source side
Fractional part of the results of calculation
of the phase in the horizontal starting position
on the source side
H1PHS_DCML, H1PHS_INTGR
Horizontal width of
source area SSWIDH
(number of pixels)
Transfer
Destination area
Partial
extraction area
(after resizing)
Full destination area
(after resizing)
Vertical height of
destination area
DCHIGH
(number of lines)
Horizontal width of destination area DCWIDH
(number of pixels)
Figure 26.37 Summary of Partial Extraction Resizing
(a) What is partial resizing?
Given an original source image area (for example, a 500 × 300 pixel area) for a fully resized
destination image, if only a part (for example, 50 × 50 pixels) of the source image area is
modified, partial resizing refers to the method by which only the modified area (approximately 50
× 50 pixels) is resized, instead of resizing the entire source image area (500 × 300).
Rev. 1.00 Mar. 25, 2008 Page 1435 of 1868
REJ09B0372-0100