RGB to Web Hex?

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Socoder -> Blitz -> RGB to Web Hex?
Wed, 21 Oct 2009, 02:26
LostUser	How do you convert RGB to Hex as seen in web CSS colors in Blitz? ie: 255, 255, 255 = FFFFFF I tried using the Hex() function but it doesn't return the correct values. Are you meant to add the R,G and B together, or something? ; websafe colors r = Rand(1,219) g = Rand(1,219) b = Rand(1,219) print "r:" + r + " g:" + g + " b: " + b print hex(r+g+b) // this is wrong --v
Wed, 21 Oct 2009, 03:22
JL235	I agree with Agent Smith. Your not shifting the values. But I'd say you should also hide the shifting away, so as an alternative you can use some functions I had built for this gradients code snippet. Here are two functions I've pulled from it: newRGB(red, green, blue) newARGB(alpha, red, green, blue) ; newRGB ; ; Given three colour components, this will return a new colour in the ARGB format. The alpha component ; will be set to 255. ; ; @param red The red value for the color to be produced. ; @param green It's green component. ; @param blue The blue component. ; @return The given components all combined into one ARGB integer. Function newRGB(red, green, blue) Return newARGB(255, red, green, blue) End Function ; newARGB ; ; Given four colour components, this will mix them together into the ARGB format. It's expected that ; each component is a value from 0 to 255 (inclusive). ; ; @param alpha The alpha value for the color to produce. ; @param red The red value for the color to be produced. ; @param green It's green component. ; @param blue The blue component. ; @return The given components all combined into one ARGB integer. Function newARGB(alpha, red, green, blue) Return ((alpha And $ff) Shl 24) Or ((red And $ff) Shl 16) Or ((green And $ff) Shl 8) Or (blue And $FF) End Function --v So your code can just be: ; websafe colors red = Rand( 1, 219 ) green = Rand( 1, 219 ) blue = Rand( 1, 219 ) color = newRGB( red, green, blue ) print "r:" + red + " g:" + green + " b: " + blue print hex( color ) --v
Wed, 21 Oct 2009, 04:50
Jayenkai	Bloody 'ell, talk about making things complex! bitshifting!?! It's a string!!! Print "Colors!" Color 255,0,0:Print ColorHex() Color 0,255,0:Print ColorHex() Color 0,0,255:Print ColorHex() Color 255,255,255:Print ColorHex() Color 255,255,0:Print ColorHex() Color 255,128,0:Print ColorHex() Color 0,128,255:Print ColorHex() Function ColorHex$() Return Right$(Hex$(ColorRed()),2)+Right$(Hex$(ColorGreen()),2)+Right$(Hex$(ColorBlue()),2) End Function --v -=-=- ''Load, Next List!''
Wed, 21 Oct 2009, 05:30
LostUser	Thanks for your help.
Wed, 21 Oct 2009, 05:32
JL235	Yours presumes that he only wants to convert the currently set colour to hex. It's better to move the conversion code out, so it can be used separately. Function ColorHex$() return ColorToHex( ColorRed(), ColorGreen(), ColorBlue() ) End Function function ColorToHex$(red, green, blue) Return Right$(Hex$(red), 2) + Right$(Hex$(green), 2) + Right$(Hex$(blue), 2) end function --v
Wed, 21 Oct 2009, 06:42
Jayenkai	Assuming you're running it in DebugMode your point is valid, but even my celeron could happily run that all day! (and by "all day" I actually mean "for about 20 mins before it overheats due to having to cope with DirectX doing it's thing.. poor celeron) -=-=- ''Load, Next List!''
Wed, 21 Oct 2009, 07:22
Evil Roy Ferguso	Since the Blitz angle is already taken care of, I'd like to note that you do not actually have to convert colors to Hex for CSS, because the following is possible: color: rgb(212, 208, 200); --v It's part of the CSS standard, and even IE6 supports it.
Wed, 21 Oct 2009, 08:26
Jayenkai	Indeed, and RGBA(r,g,b,a) lets you add alpha, too, which is nice. -=-=- ''Load, Next List!''
Wed, 21 Oct 2009, 12:12
LostUser	I require the hex because I do this to style things, and I just wanted a way of grabbing the hex of colors that were either set elsewhere, or randomly generated. bg = $FFFFFF ; or other web safe color color 0,0,bg --v Thanks for all your help.