SH7205 Datasheet, PDF (1468/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 26 2D Graphics Engine (2DG)
(b) Defining the area to be partially resized
• EDGE bits of GR_RISZSET register
When performing full or partial resizing, it is necessary to determine whether the right edge or the
lower edge of the source area to be resized coincides with the right or lower edge of the full-resize
area. For this reason, when performing a full or partial resizing, the EDGE bits of the
GR_RISZSET register must be set.
Figure 26.38 explains the values of the EDGE bits to be set in the GR_RISZSET register for areas
1 (TL) to 5 (MM) for partial resizing relative to the full resizing area (area in the bold frame). In
reference to the pointers given below, set the EDGE bits according to the position of the partial
resizing area.
4. TR
3. BR
5. MM
Full resizing area
1. TL
2. BL
1. TL: Not on the lower edge in the vertical direction,
but on the right edge in the horizontal direction. EDGE = 01
2. BL: On the lower edge in the vertical direction,
and on the right edge in the horizontal direction. EDGE = 11
3. BR: On the lower edge in the vertical direction,
but not on the right edge in the horizontal direction. EDGE = 10
4. TR: Not on the lower edge in the vertical direction,
and not on the right edge in the horizontal direction. EDGE = 00
5. MM: Not on the lower edge of the vertical direction,
and not on the right edge in the horizontal direction. EDGE = 00
Note: For full resizing, EDGE should be set to 11 (Initial value).
Figure 26.38 Examples of Partial Resizing Areas
Rev. 1.00 Mar. 25, 2008 Page 1436 of 1868
REJ09B0372-0100