GdkPixbuf.Pixbuf.composite_color

### Method

# GdkPixbuf.Pixbuf.composite_color

#### Declaration [src]

    void
    gdk_pixbuf_composite_color (
      const GdkPixbuf* src,
      GdkPixbuf* 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,
      GdkInterpType interp_type,
      int overall_alpha,
      int check_x,
      int check_y,
      int check_size,
      guint32 color1,
      guint32 color2
    )

#### Description [src]

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 `gdk_pixbuf_composite_color_simple()` for a simpler variant of this function suitable for many tasks.

#### Parameters

`dest` | `GdkPixbuf`
| the `GdkPixbuf` into which to render the results
| Ownership is not transferred to the callee
`dest_x` | `int`
| the left coordinate for region to render
`dest_y` | `int`
| the top coordinate for region to render
`dest_width` | `int`
| the width of the region to render
`dest_height` | `int`
| the height of the region to render
`offset_x` | `double`
| the offset in the X direction (currently rounded to an integer)
`offset_y` | `double`
| the offset in the Y direction (currently rounded to an integer)
`scale_x` | `double`
| the scale factor in the X direction
`scale_y` | `double`
| the scale factor in the Y direction
`interp_type` | `GdkInterpType`
| the interpolation type for the transformation.
`overall_alpha` | `int`
| overall alpha for source image (0..255)
`check_x` | `int`
| the X offset for the checkboard (origin of checkboard is at -`check_x`, -`check_y`)
`check_y` | `int`
| the Y offset for the checkboard
`check_size` | `int`
| the size of checks in the checkboard (must be a power of two)
`color1` | `guint32`
| the color of check at upper left
`color2` | `guint32`
| the color of the other check