diff options
| author | Pierre-Antoine Rouby <contact@parouby.fr> | 2019-05-29 22:43:27 +0200 |
|---|---|---|
| committer | David Thompson <dthompson2@worcester.edu> | 2019-05-31 09:51:18 -0400 |
| commit | e455ed5e2d41cb5f8c0f4d536f650a40a9cdc534 (patch) | |
| tree | 0a52bf81cefb6f423d9b85014e40f89722053b34 | |
| parent | 75e37396df6ceb6732c37800e098333dc90d2211 (diff) | |
render: Add SDL_RenderDrawPoints binding.
* sdl2/bindings.scm (sdl-render-draw-points): New procedure.
* sdl2/render.scm (render-draw-points): New procedure.
* doc/api.texi (Rendering): Document it.
| -rw-r--r-- | doc/api.texi | 5 | ||||
| -rw-r--r-- | sdl2/bindings.scm | 3 | ||||
| -rw-r--r-- | sdl2/render.scm | 16 |
3 files changed, 24 insertions, 0 deletions
diff --git a/doc/api.texi b/doc/api.texi index 0a154ae..b692725 100644 --- a/doc/api.texi +++ b/doc/api.texi @@ -1066,6 +1066,11 @@ Draw a point at (@var{x}, @var{y}) on the current rendering target of @var{renderer}. @end deffn +@deffn {Procedure} render-draw-points renderer points +Draw a multiple points from @var{points} on the current rendering +target of @var{renderer}. +@end deffn + @deffn {Procedure} surface->texture renderer surface Convert @var{surface} to a texture suitable for @var{renderer}. @end deffn diff --git a/sdl2/bindings.scm b/sdl2/bindings.scm index c382a45..bf8db7a 100644 --- a/sdl2/bindings.scm +++ b/sdl2/bindings.scm @@ -255,6 +255,9 @@ RETURN-TYPE and accept arguments of ARG-TYPES." (define-foreign sdl-render-draw-point int "SDL_RenderDrawPoint" (list '* int int)) +(define-foreign sdl-render-draw-points + int "SDL_RenderDrawPoints" (list '* '* int)) + ;;; ;;; Events diff --git a/sdl2/render.scm b/sdl2/render.scm index 91236c6..326745f 100644 --- a/sdl2/render.scm +++ b/sdl2/render.scm @@ -40,6 +40,7 @@ set-render-draw-color render-draw-line render-draw-point + render-draw-points delete-texture! surface->texture)) @@ -118,6 +119,21 @@ color." "Draw point on RENDERER." (ffi:sdl-render-draw-point (unwrap-renderer renderer) x y)) +(define (render-draw-points renderer points) + "Draw POINTS on RENDERER." + (define (fill-bv bv l n) + (match l + (() bv) + (((x y) . r) + (s32vector-set! bv n x) + (s32vector-set! bv (+ n 1) y) + (fill-bv bv r (+ 2 n))))) + (let* ((count (length points)) + (bv (fill-bv (make-s32vector (* count 2)) points 0))) + (ffi:sdl-render-draw-points (unwrap-renderer renderer) + (bytevector->pointer bv) + count))) + ;;; ;;; Texture |