1PatternHandler class
2####################
3
4PatternHandler provides an easy way to integrate pattern support into
5classes which require it, such as the DisplayDriver class.
6
7
8Enumerated Types
9================
10
11pattern_enum
12------------
13
14- uint64 type64
15- uint8 type8 [8]
16
17Member Functions
18================
19
20PatternHandler()
21----------------
22
23
241. Initialize internal RGBColor variables to black and white, respectively.
252. Set internal pattern to B_SOLID_HIGH (all 1's)
26
27~PatternHandler()
28-----------------
29
30Empty
31
32
33void SetTarget(int8 \*pattern)
34------------------------------
35
36Updates the pattern handler's pattern. It copies the pattern passed to
37it, so it does NOT take responsibility for freeing any memory.
38
39
401. cast the passed pointer in such a way to copy it as a uint64 to the
41   pattern_enum.type64 member
42
43void SetColors(RGBColor c1, RGBColor c2)
44----------------------------------------
45
46Sets the internal high and low colors for the pattern handler. These
47will be the colors returned when GetColor() is called.
48
49
501. Assign c1 to high color and c2 to low color
51
52
53RGBColor GetColor(BPoint pt) RGBColor GetColor (float x, float y)
54-----------------------------------------------------------------
55
56bool GetValue(BPoint pt) bool GetValue (float x, float y)
57---------------------------------------------------------
58
59GetColor returns the color in the pattern at the specified location.
60GetValue returns true for the high color and false for the low color.
61
621. xpos = x % 8, ypos = y % 8 2) value = pointer [ ypos ] & ( 1 << (7 - xpos) )
632. GetValue: return (value==0)?false:true
643. GetColor: return (value==0)?lowcolor:highcolor
65
66