cairo_draw_image   xtlang


Defined in:  https://github.com/digego/extempore/tree/v0.8.9/examples/contrib/drawing.xtm

Implementation

(bind-func cairo_draw_image
  (lambda (cr:cairo_surface_t* image:cairo_surface_t* sx sy sw:double sh:double dx dy dw dh)
    (let ((scalex (/ dw sw))
    (scaley (/ dh sh)))
      (cairo_save cr)
      (cairo_scale cr scalex scaley)
      (cairo_set_source_surface cr image (- (* dx scalex) (* 1.0 sx)) (- (* dy scaley) (* 1.0 sy)))
      (cairo_rectangle cr (/ dx scalex) (/ dy scaley) (/ dw scalex) (/ dh scaley))
      (cairo_fill cr)
      (cairo_restore cr)
      void)))


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