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	'''INT''' rgbscale ( <'''INT''' fileID> , <'''INT''' fraphID> , <'''FLOAT''' r> , <'''FLOAT''' g> , <'''FLOAT''' b> )		'''INT''' rgbscale ( <'''INT''' fileID> , <'''INT''' fraphID> , <'''FLOAT''' r> , <'''FLOAT''' g> , <'''FLOAT''' b> )
-	This will convert the specified graph by using the specified color as a reference. The converted graph will have only the specified color and lighter/darker colors; see [[#Notes|notes]] for the details.	+	This will convert the specified [[graphic]] by using the specified color as a reference. The converted graphic will have only the specified color and lighter/darker colors; see [[#Notes|notes]] for the details.
	== Parameters ==		== Parameters ==
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	== Returns ==		== Returns ==
-	'''INT''' : [[true]]	+	'''INT'''
		+	{|
		+	| -1 || - Invalid graphic.
		+	|-
		+	| 1 || - Success.
		+	|}
	== Errors ==		== Errors ==
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	</pre>		</pre>
	where r,g,b are the specified r,g,b.		where r,g,b are the specified r,g,b.
		+
		+	Note that <code>[[rgbscale]](0,map,1,1,1) = [[grayscale]](0,map,0)</code>, for a valid graphic (0,map).
	{{Funcbox		{{Funcbox
	| category=Graphical effects		| category=Graphical effects
	}}		}}

---

Current revision

Contents 1 Definition 2 Parameters 3 Returns 4 Errors 5 Notes

[edit] Definition

INT rgbscale ( <INT fileID> , <INT fraphID> , <FLOAT r> , <FLOAT g> , <FLOAT b> )

This will convert the specified graphic by using the specified color as a reference. The converted graphic will have only the specified color and lighter/darker colors; see notes for the details.

[edit] Parameters

INT fileID	- The fileID of the file that holds the graphics.
INT graphID	- The graphID of the graphic to convert.
FLOAT r	- The red component of the color to be used for reference.
FLOAT g	- The green component of the color to be used for reference.
FLOAT b	- The blue component of the color to be used for reference.

[edit] Returns

INT

-1	- Invalid graphic.
1	- Success.

[edit] Errors

Unsupported color depth

- The graphic's color depth is not 16bit.

[edit] Notes

The exact formula is:

for every pixel:
    c = 0.3 * oldpixel_r + 0.59 * oldpixel_g + 0.11 * oldpixel_b
    newpixel_r = r * c;
    newpixel_g = g * c;
    newpixel_b = b * c;

where r,g,b are the specified r,g,b.

Note that rgbscale(0,map,1,1,1) = grayscale(0,map,0), for a valid graphic (0,map).

Graphical effects Functions

• Blur() • Grayscale() • Rgbscale() •