MultiColored Graphics Text

==Multi-Colored Text==
===Add a Little More Pizzaz to Graphics Text=== [[user:JanetTerra]]

You can define the color of your graphics text with the graphics COLOR command.  There are these 16 defined colors and then Buttonface, the default background color.
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//**[[http://www.libertybasic.com|Liberty BASIC's]] 16 Named Colors**//
> Yellow
> Brown
> Red
> Darkred
> Pink
> Darkpink
> Blue
> Darkblue
> Green
> Darkgreen
> Cyan
> Darkcyan
> White
> Black
> Lightgray (also called Palegray)
> Darkgray

The COLOR command works with a //**Graphics Window**// or //**Graphicbox**//.
[[code format="vb"]]
Open "My Graphics" for Graphics as #g
[[code]]
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//**The COLOR Command Using a Named Color**//
[[code format="vb"]]
Print #g, "Color Blue"
[[code]]
or
[[code format="vb"]]
hue$ = "Blue"
Print #g, "Color ";hue$
[[code]]
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//**The COLOR Command Using an RGB Color**//

Beyond the named colors are the RGB colors.  RGB colors are composites of Red, Green and Blue.  Each of the three colors can hold values of 0 - 255.
[[code format="vb"]]
Print #g, "Color 128 0 255"
[[code]]
or
[[code format="vb"]]
redHue = 128
greenHue = 0
blueHue = 255
Print #g, "Color ";redHue;" ";greenHue;" ";blueHue
[[code]]
or
[[code format="vb"]]
hue$ = "128 0 255"
Print #g, "Color ";hue$
[[code]]
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Only one color can be used at a time, but, by layering colors, some very interesting effects can be achieved.  The following demo
# Gets a bitmap of the entire graphics window (pic1)
# Selects a new color for the text
# Draws the text in the new color
# Gets a bitmap of a portion of the graphics window (pic)
# Draws pic1
# Overlays pic1 with pic2
# Begins again with Step 1

This loop continues for the height of the text.  All drawing is **DISCARD**ed until the final drawing is captured with the **GETBMP** command, displayed with the **DRAWBMP** command and **FLUSH**ed to conserve memory.  Memory is further conserved with a combination of **SEGMENT** and **DELSEGMENT** commands.
[[code format="vb"]]
    Nomainwin
    WindowWidth = 757
    WindowHeight = 554
    UpperLeftX = Int((DisplayWidth - WindowWidth) /2)
    UpperLeftY = Int((DisplayHeight - WindowHeight) /2)

    Menu #demo, "&Options", "E&xit", MenuExit
    Graphicbox #demo.gb1, 0, 0, 750, 500

    Open "Rainbow Text" for Window as #demo
    #demo, "Trapclose TrapExit"
    #demo.gb1, "Down; Fill Lightgray; Flush"
    #demo.gb1, "Getbmp pic 0 0 750 500"

    Call RainbowText "Rainbow Colors", "Verdana 32 Bold", 80, 100
    Call VarigatedText "Varigated Blue", "Courier_New 54 Bold Italic", 70, 200

    Wait

Sub TrapExit handle$
    Close #handle$
    End
End Sub

Sub MenuExit
    Call TrapExit "#demo"
End Sub

Sub RainbowText text$, textFont$, textLLX, textLLY
    Unloadbmp "pic"
    #demo.gb1, "Font ";textFont$
    FontHeight = FontHeight(textFont$)
    yUpper = textLLY - FontHeight
    yLower = textLLY + Int(FontHeight / 2)
    For y = yLower to yUpper Step -3
        #demo.gb1, "Getbmp pic1 0 0 750 500"
        redHue = Int(Rnd(1) * 256)
        greenHue = Int(Rnd(1) * 256)
        blueHue = Int(Rnd(1) * 256)
        #demo.gb1, "Backcolor Lightgray"
        #demo.gb1, "Color ";redHue;" ";greenHue;" ";blueHue
        #demo.gb1, "Place ";textLLX;" ";textLLY
        #demo.gb1, "\";text$
        #demo.gb1, "Getbmp pic2 0 0 750 ";y
        #demo.gb1, "Drawbmp pic1 0 0"
        #demo.gb1, "Drawbmp pic2 0 0"
        #demo.gb1, "Discard"
    Next y
    #demo.gb1, "Getbmp pic 0 0 750 500"
    #demo.gb1, "Drawbmp pic 0 0"
    #demo.gb1, "Segment segID"
    #demo.gb1, "Flush"
    #demo.gb1, "Delsegment ";segID - 1
End Sub

Sub VarigatedText text$, textFont$, textLLX, textLLY
    Unloadbmp "pic"
    FontHeight = FontHeight(textFont$)
    #demo.gb1, "Font ";textFont$
    yUpper = textLLY - FontHeight - 2
    yLower = textLLY + Int(FontHeight / 2)
    hueInc = Int(256 / FontHeight) * 2
    blueHue = 0
    For y = yLower to yUpper Step -2
        #demo.gb1, "Getbmp pic1 0 0 750 500"
        blueHue = Min(255, blueHue + hueInc)
        #demo.gb1, "Backcolor Lightgray"
        #demo.gb1, "Color 0 0 ";blueHue
        #demo.gb1, "Place ";textLLX;" ";textLLY
        #demo.gb1, "\";text$
        #demo.gb1, "Getbmp pic2 0 0 750 ";y
        #demo.gb1, "Drawbmp pic1 0 0"
        #demo.gb1, "Drawbmp pic2 0 0"
        #demo.gb1, "Discard"
    Next y
    #demo.gb1, "Getbmp pic 0 0 750 500"
    #demo.gb1, "Drawbmp pic 0 0"
    #demo.gb1, "Segment segID"
    #demo.gb1, "Flush"
    #demo.gb1, "Delsegment ";segID - 1
End Sub

Function FontHeight(textFont$)
    n = 1
    While Val(Word$(textFont$, n)) = 0
        n = n + 1
    Wend
    FontHeight = Val(Word$(textFont$, n))
End Function
[[code]]
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If the graphics window becomes obscured by another window or lies offscreen, **DRAWBMP** will not capture the full drawing.  This can be prevented by using the [[http://lbpe.wikispaces.com/Stylebits+-+Windows|stylebits]] **WS_EX_TOPMOST** prior to opening the window.