composite_color

Description:

public void composite_color (Pixbuf dest, int dest_x, int dest_y, int dest_width, int dest_height, double offset_x, double offset_y, double scale_x, double scale_y, InterpType interp_type, int overall_alpha, int check_x, int check_y, int check_size, uint32 color1, uint32 color2)

Creates a transformation of the source image this by scaling by scale_x and scale_y then translating by offset_x and offset_y, then alpha blends the rectangle (dest_x ,dest_y, dest_width, dest_height) of the resulting image with a checkboard of the colors color1 and color2 and renders it onto the destination image.

If the source image has no alpha channel, and overall_alpha is 255, a fast path is used which omits the alpha blending and just performs the scaling.

See composite_color_simple for a simpler variant of this function suitable for many tasks.

Parameters:

this	a Pixbuf
dest	the Pixbuf into which to render the results
dest_x	the left coordinate for region to render
dest_y	the top coordinate for region to render
dest_width	the width of the region to render
dest_height	the height of the region to render
offset_x	the offset in the X direction (currently rounded to an integer)
offset_y	the offset in the Y direction (currently rounded to an integer)
scale_x	the scale factor in the X direction
scale_y	the scale factor in the Y direction
interp_type	the interpolation type for the transformation.
overall_alpha	overall alpha for source image (0..255)
check_x	the X offset for the checkboard (origin of checkboard is at -`check_x`, -`check_y`)
check_y	the Y offset for the checkboard
check_size	the size of checks in the checkboard (must be a power of two)
color1	the color of check at upper left
color2	the color of the other check