5 Bitmaps

(require sgl/bitmap)

(bitmap->gl-list   bitmap            [ #:with-gl with-gl-proc             #:mask mask])   →   exact-integer?

bitmap : (is-a?/c bitmap%)

with-gl-proc : ((-> any) . -> . any) = (lambda (f) (f))

mask   :   (or/c (is-a?/c bitmap%) false/c)       =   (send bitmap get-loaded-mask)

Converts the given bitmap into an OpenGL list that can be rendered with gl-call-list or glCallList. The rendered object is a square on the z=0 plane with corners at (0,0) and (1,1).

The with-gl-proc must accept a thunk and call it while the relevant OpenGL context is selected. Otherwise, the relevant OpenGL context must be selected already.

If mask is not #f, it is used as the mask bitmap for extracting alpha values.