GraMaMa (Gradient Mask Maker)

Abstract

• YV12 Colorspace

license: public domain

Usage

GraMaMa (clip, int mode = 1, int a = clip.width/2, int b = clip.height/2, int rad = clip.width/4, int rad2, bool binarize = false)

Description of the filter

GraMaMa creates a mask (either greyscale or black/white) given a prescribed shape (such as circle, ellipse, line, square and rectangle). It replaces the input clip by a mask with the same dimensions and color format.

mode: 1 (circle), 2 (square), 3 (diamond), 4 (line), 5 (ellipse) or 6 (rectangle).

(a,b) is the center of the mask. It can be located outside the clip.

rad is the horizontal radius of the mask.

rad2 is the vertical radius of the mask (for mode=1,3,4 it is equal to rad; for mode=5,6 (default rad/2) it can be set separately; for mode=2 is results in a vertical gradient mask (when rad2>0).

binarize = false (gradient mask), binarize = true (black and white mask).

Examples

ellipse gradient mask	square gradient mask
GraMaMa(5, 320, 240, 120, 60)	GraMaMa(3, 320, 240, 120)

If you don't have an input clip, you can use BlackClip(width=..., height=..., fps=...). For example:

horizontal line gradient mask

LoadPlugin("F:\CompilingPlugins\GraMaMa\Release\GraMaMa.dll") BlankClip(width=640, height=480, fps=25) ConvertToYV12() GraMaMa(4, 320, 240, 120)

Version

v0.2, 14th February 2008

• Some corrections and other default values.
• Added ellips and rectangle.
• Added binarize=true/false.
• Added documentation.

v0.1, 21st January 2005

• Initial release by E_Male.