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< P class = "Body" style = "margin: 0px" > < span class = "OBOS-Title" > PatternHandler class< / span > < span style = "color: rgb(0,0,0); font-size: 24pt" > < / span > < / P >
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< P class = "Body" style = "margin: 0px" > PatternHandler provides an easy way to integrate pattern support into classes which require it, such as the DisplayDriver class.< / P >
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Member Functions< / P >
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< P class = "Body" style = "margin: 0px" > PatternHandler(void)< / P >
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< P class = "Body" style = "margin: 0px" > ~PatternHandler(void)< / P >
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< P class = "Body" style = "margin: 0px" > void SetTarget(int8 *pattern)< / P >
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< P class = "Body" style = "margin: 0px" > void SetColors(RGBColor c1, RGBColor c2)< / P >
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< P class = "Body" style = "margin: 0px" > RGBColor GetColor(BPoint pt)< / P >
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< P class = "Body" style = "margin: 0px" > RGBColor GetColor(float x, float y)< / P >
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< P class = "Body" style = "margin: 0px" > bool GetValue(float x, float y)< / P >
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< P class = "Body" style = "margin: 0px" > bool GetValue(BPoint pt)< / P >
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Enumerated Types< / P >
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pattern_enum< / P >
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< P class = "Body" style = "margin: 0px" > uint64 type64< / P >
< P class = "Body" style = "margin: 0px" > uint8 type8 [8]< / P >
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< P class = "Body" style = "margin: 0px" > < span class = "OBOS-Function-Def" > PatternHandler()< / span > < span style = "font-size: 16pt" > < / span > < / P >
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1) Initialize internal RGBColor variables to black and white, respectively.< / P >
< P class = "Body" style = "margin: 0px" > 2) Set internal pattern to B_SOLID_HIGH (all 1's)< / P >
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< span class = "OBOS-Function-Def" > ~PatternHandler()< / span > < span style = "font-size: 16pt" > < / span > < / P >
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Empty< / P >
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< span class = "OBOS-Function-Def" > void SetTarget(int8 *pattern)< / span > < / P >
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Updates the pattern handler's pattern. It copies the pattern passed to it, so it does NOT take responsibility for freeing any memory.< / P >
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1) cast the passed pointer in such a way to copy it as a uint64 to the pattern_enum.type64 member< / P >
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< span class = "OBOS-Function-Def" > void SetColors(RGBColor c1, RGBColor c2)< / span > < / P >
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Sets the internal high and low colors for the pattern handler. These will be the colors returned when GetColor() is called.< / P >
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1) Assign c1 to high color and c2 to low color< / P >
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< span class = "OBOS-Function-Def" > RGBColor GetColor(BPoint pt)
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RGBColor GetColor (float x, float y)< / span > < / P >
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< span class = "OBOS-Function-Def" > bool GetValue(BPoint pt)
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bool GetValue (float x, float y)< / span > < / P >
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< / span > < span class = "Default" > GetColor returns the color in the pattern at the specified location. GetValue returns true for the high color and false for the low color.< / span > < / P >
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1) xpos = x % 8, ypos = y % 8
2) value = pointer [ ypos ] & ( 1 < < (7 - xpos) )< / span > < / P >
< P class = "Body" style = "margin: 0px" > < span class = "Default" > 3) GetValue: return (value==0)?false:true< / span > < / P >
< P class = "Body" style = "margin: 0px" > < span class = "Default" > GetColor: return (value==0)?lowcolor:highcolor< / span > < / P >
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