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Showing content from http://libvips.github.io/libvips/API/current/method.Image.draw_rect.html below:

Vips.Image.draw_rect

int
vips_draw_rect (
  VipsImage* image,
  double* ink,
  int n,
  int left,
  int top,
  int width,
  int height,
  ...
)

Paint pixels within left, top, width, height in image with ink.

If fill is zero, just paint a 1-pixel-wide outline.

Optional arguments

• fill: gboolean, fill the rect

This method is not directly available to language bindings.

ink

Type: An array of double

Value to draw.

The length of the array is specified in the n argument. The data is owned by the caller of the method.

n

Type: int

Length of ink array.

left

Type: int

Area to paint.

top

Type: int

Area to paint.

width

Type: int

Area to paint.

height

Type: int

Area to paint.

...

Type: 

NULL-terminated list of optional named arguments.

Type: int

0 on success, or -1 on error.

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