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