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66 lines
1.6 KiB
ReStructuredText
66 lines
1.6 KiB
ReStructuredText
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PatternHandler class
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####################
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PatternHandler provides an easy way to integrate pattern support into
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classes which require it, such as the DisplayDriver class.
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Enumerated Types
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================
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pattern_enum
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------------
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- uint64 type64
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- uint8 type8 [8]
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Member Functions
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================
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PatternHandler()
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----------------
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1. Initialize internal RGBColor variables to black and white, respectively.
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2. Set internal pattern to B_SOLID_HIGH (all 1's)
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~PatternHandler()
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-----------------
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Empty
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void SetTarget(int8 \*pattern)
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------------------------------
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Updates the pattern handler's pattern. It copies the pattern passed to
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it, so it does NOT take responsibility for freeing any memory.
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1. cast the passed pointer in such a way to copy it as a uint64 to the
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pattern_enum.type64 member
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void SetColors(RGBColor c1, RGBColor c2)
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----------------------------------------
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Sets the internal high and low colors for the pattern handler. These
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will be the colors returned when GetColor() is called.
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1. Assign c1 to high color and c2 to low color
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RGBColor GetColor(BPoint pt) RGBColor GetColor (float x, float y)
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-----------------------------------------------------------------
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bool GetValue(BPoint pt) bool GetValue (float x, float y)
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---------------------------------------------------------
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GetColor returns the color in the pattern at the specified location.
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GetValue returns true for the high color and false for the low color.
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1. xpos = x % 8, ypos = y % 8 2) value = pointer [ ypos ] & ( 1 << (7 - xpos) )
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2. GetValue: return (value==0)?false:true
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3. GetColor: return (value==0)?lowcolor:highcolor
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