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Contents 1 Definition 2 Parameters 3 Returns 4 Errors 5 Notes

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.

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.

Returns

INT

-1	- Invalid graphic.
1	- Success.

Errors

Unsupported color depth

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

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).

Graphical effects Functions

• Blur() • Grayscale() • Rgbscale() •