Pixbuf.compositeColor

Creates a transformation of the source image src 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 Pixbuf.compositeColorSimple for a simpler variant of this function suitable for many tasks.

class Pixbuf

void

compositeColor

(

Pixbuf dest

int destX

int destY

int destWidth

int destHeight

double offsetX

double offsetY

double scaleX

double scaleY

GdkInterpType interpType

int overallAlpha

int checkX

int checkY

int checkSize

uint color1

uint color2

)

Parameters

dest Pixbuf: the gdk.Pixbuf into which to render the results
destX int: the left coordinate for region to render
destY int: the top coordinate for region to render
destWidth int: the width of the region to render
destHeight int: the height of the region to render
offsetX double: the offset in the X direction (currently rounded to an integer)
offsetY double: the offset in the Y direction (currently rounded to an integer)
scaleX double: the scale factor in the X direction
scaleY double: the scale factor in the Y direction
interpType GdkInterpType: the interpolation type for the transformation.
overallAlpha int: overall alpha for source image (0..255)
checkX int: the X offset for the checkboard (origin of checkboard is at -check_x, -check_y)
checkY int: the Y offset for the checkboard
checkSize int: the size of checks in the checkboard (must be a power of two)
color1 uint: the color of check at upper left
color2 uint: the color of the other check