bit meaning
0 1 = justify specified by graphics cursor, 0 = not justified
1 1 = rub-out box specified by graphics cursor, 0 = don't rub-out
4 1 = x and y are in OS, 0 = millipoints
5 justify & rub-out specified by block in R5 (bit 4 must be clear), 0 = use flags in bits 0,1
6 Transformation matrix specified by R6 (bit 4 must be clear)
7 Given string length
8 Given font
9 Kern
10 Right to left
11 Background blending (FontManager 3.35+)
12 R1 points to 16-bit string (bit 13 must be clear) (FontManager 3.41+)
13 R1 points to 32-bit string (bit 12 must be clear) (FontManager 3.41+)
17 Return caret position
18 Return bounding box
19 Return matrix
20 Return split count
Others Reserved, must be zero
RISC OS 2 only recognises flags in bits 0,1,4
To specify justify using the graphics cursor, first move to right side. To specify a rub-out box using the graphics cursor, first move to lower left and then to upper right of box.
If both, then do justify move last.
Background Blending
To use background blending you must ensure:
· You have checked with Font_CacheAddr that the Font Manager supports this bit, as versions earlier than 3.35 will complain if the bit is set.
· Font colours specify 1 or more anti-aliasing colours, else the Font Manager will use 1bpp (non-aliased) painting.
As blending is slow you should avoid it on known uniform backgrounds.
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