119 lines
4.9 KiB
HTML
119 lines
4.9 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>PatternHandler.htm</TITLE>
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<style type="text/css">
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.Default {background-color: rgb(255,255,255); color: rgb(0,0,0); font-family: 'Dutch801 Rm BT'; font-size: 12pt}
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.OBOS-Function-Def {background-color: rgb(255,255,255); color: rgb(0,0,0); font-family: 'Dutch801 Rm BT'; font-size: 16pt}
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.OBOS-Title {background-color: rgb(255,255,255); color: rgb(0,128,0); font-family: 'Dutch801 Rm BT'; font-size: 24pt}
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</style>
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</HEAD>
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<BODY BGCOLOR="#ffffff">
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<DIV class="sheet" id="Sheet 1">
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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"><BR>
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</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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<P class="Body" style="margin: 0px"><BR>
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<BR>
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<HR>
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</P>
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<P class="Body" style="margin: 0px"><BR>
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Member Functions</P>
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<P class="Body" style="margin: 0px"><BR>
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</P>
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<TABLE WIDTH=618 HEIGHT=90 BORDER=1 CELLPADDING=1 CELLSPACING=2>
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<TR>
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<TD WIDTH=219 HEIGHT=17>
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<P class="Body" style="margin: 0px">PatternHandler(void)</P>
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</TD>
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<TD WIDTH=245 HEIGHT=17>
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<P class="Body" style="margin: 0px">~PatternHandler(void)</P>
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</TD>
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</TR>
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<TR>
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<TD WIDTH=219 HEIGHT=17>
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<P class="Body" style="margin: 0px">void SetTarget(int8 *pattern)</P>
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</TD>
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<TD WIDTH=245 HEIGHT=17>
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<P class="Body" style="margin: 0px">void SetColors(RGBColor c1, RGBColor c2)</P>
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</TD>
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</TR>
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<TR>
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<TD WIDTH=219 HEIGHT=17>
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<P class="Body" style="margin: 0px">RGBColor GetColor(BPoint pt)</P>
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</TD>
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<TD WIDTH=245 HEIGHT=17>
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<P class="Body" style="margin: 0px">RGBColor GetColor(float x, float y)</P>
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</TD>
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</TR>
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<TR>
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<TD WIDTH=219 HEIGHT=17>
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<P class="Body" style="margin: 0px">bool GetValue(float x, float y)</P>
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</TD>
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<TD WIDTH=245 HEIGHT=17>
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<P class="Body" style="margin: 0px">bool GetValue(BPoint pt)</P>
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</TD>
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</TR>
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</TABLE>
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<P class="Body" style="margin: 0px"><BR>
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<BR>
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Enumerated Types</P>
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<P class="Body" style="margin: 0px"><BR>
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pattern_enum</P>
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<P class="Body" style="margin: 0px">{</P>
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<P class="Body" style="margin: 0px"> uint64 type64</P>
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<P class="Body" style="margin: 0px"> uint8 type8 [8]</P>
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<P class="Body" style="margin: 0px">}</P>
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<P class="Body" style="margin: 0px"><BR>
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<HR>
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</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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<P class="Body" style="margin: 0px"><BR>
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1) Initialize internal RGBColor variables to black and white, respectively.</P>
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<P class="Body" style="margin: 0px">2) Set internal pattern to B_SOLID_HIGH (all 1's)</P>
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<P class="Body" style="margin: 0px"><BR>
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<BR>
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<span class="OBOS-Function-Def">~PatternHandler()</span><span style="font-size: 16pt"></span></P>
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<P class="Body" style="margin: 0px"><BR>
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Empty</P>
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<P class="Body" style="margin: 0px"><BR>
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<BR>
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<span class="OBOS-Function-Def">void SetTarget(int8 *pattern)</span></P>
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<P class="Body" style="margin: 0px"><BR>
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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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<P class="Body" style="margin: 0px"><BR>
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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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<P class="Body" style="margin: 0px"><BR>
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<span class="OBOS-Function-Def">void SetColors(RGBColor c1, RGBColor c2)</span></P>
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<P class="Body" style="margin: 0px"><BR>
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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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<P class="Body" style="margin: 0px"><BR>
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1) Assign c1 to high color and c2 to low color</P>
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<P class="Body" style="margin: 0px"><BR>
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<BR>
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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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<P class="Body" style="margin: 0px"><BR>
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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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<P class="Body" style="margin: 0px"><span class="OBOS-Function-Def"><BR>
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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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<P class="Body" style="margin: 0px"><span class="Default"><BR>
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1) xpos = x % 8, ypos = y % 8
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2) value = pointer [ ypos ] & ( 1 << (7 - xpos) )</span></P>
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<P class="Body" style="margin: 0px"><span class="Default">3) GetValue: return (value==0)?false:true</span></P>
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<P class="Body" style="margin: 0px"><span class="Default">GetColor: return (value==0)?lowcolor:highcolor</span></P>
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<DIV class="layer" id="Layer 1">
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</DIV>
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</DIV>
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</BODY>
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</HTML>
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