5 Bitmaps

▼ |  | GL: 3-D Graphics

1 | Using Open GL
2 | C-Style Open GL
3 | Racket-Style Open GL
4 | Open GL Vectors
5 | Bitmaps
6 | Initialization
| Index

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bitmap->gl-list

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## 5 Bitmaps🔗ℹ

(require sgl/bitmap) | package: sgl

> > procedure
> > (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.

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