SH7205 Datasheet, PDF (1487/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 26 2D Graphics Engine (2DG)
[Obtaining the number of lines for transfer in the case of duplicate-line settings]
Regardless of whether resizing is full or partial, the number of lines for transfer in the case of
duplicate-line settings is always the total obtained from the conditional expression for duplicate-
lines. Examples for the cases of full or partial resizing are explained below. Furthermore,
duplicate-line settings are made in the examples for the number of all horizontal pixels being 65 or
more.
Example 1: Duplicate-line settings in the case of full resizing
• Conditions
Number of source lines: 20
Number of destination lines: 40
Multiplication: 2 times
In this case, when the conditional expression given earlier is applied to all lines, the results are as
shown in figure 26.47. The number of lines for transfer as the total obtained from the conditional
expression for line duplication is thus 39.
Number of source lines: 20
Source-line number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Result of judgment
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Number of lines for transfer =
total of the results of judgment = 39
Figure 26.47 Duplicate-Line Settings for Full Resizing
Rev. 1.00 Mar. 25, 2008 Page 1455 of 1868
REJ09B0372-0100