Extracted from Pike v7.8 release 866 at 2016-11-06.
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GTK2
GTK2.GdkPixbuf

Methods
 add_alpha()
 composite()
 composite_color()
 composite_color_simple()
 copy()
 copy_area()
 create()
 flip()
 get_bits_per_sample()
 get_colorspace()
 get_has_alpha()
 get_height()
 get_n_channels()
 get_option()
 get_pixels()
 get_rowstride()
 get_width()
 new_subpixbuf()
 put_pixel()
 render_threshold_alpha()
 rotate_simple()
 saturate_and_pixelate()
 save()
 scale()
 scale_simple()
 set_alpha()
 set_option()
previousGTK2.GdkPixbuf()->put_pixel()
GTK2.GdkPixbuf()->rotate_simple()next

Method GTK2.GdkPixbuf()->render_threshold_alpha()

Method render_threshold_alpha

GTK2.GdkBitmap render_threshold_alpha(int src_x, int src_y, int dest_c, int dest_y, int width, int height, int alpha_threshold)

Description

Takes the opacity values in a rectangular portion of a pixbuf and thresholds them to produce a bi-level alpha mask that can be used as a clipping mask for a drawable.