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| author | Leo Prikler <leo.prikler@student.tugraz.at> | 2021-06-14 18:35:33 +0200 |
|---|---|---|
| committer | David Thompson <dthompson2@worcester.edu> | 2021-06-15 09:21:24 -0400 |
| commit | 031605783e630d46b7294d6ac8bfbf5e4884bb82 (patch) | |
| tree | 5f035448c22dedeec37a0d321165c7cbfdd99b2d | |
| parent | ac42781f672a855ea6f1553b071055409501f2b0 (diff) | |
Add support for texture blend modes.
* sdl2/bindings.scm (sdl-set-texture-blend-mode): New variable.
* sdl2/render.scm (set-texture-blend-mode!): New variable.
| -rw-r--r-- | doc/api.texi | 5 | ||||
| -rw-r--r-- | sdl2/bindings.scm | 3 | ||||
| -rw-r--r-- | sdl2/render.scm | 6 |
3 files changed, 14 insertions, 0 deletions
diff --git a/doc/api.texi b/doc/api.texi index 288d0a6..8a352a4 100644 --- a/doc/api.texi +++ b/doc/api.texi @@ -1254,6 +1254,11 @@ Set the color mod of @var{texture}. Set the alpha mod of @var{texture}. @end deffn +@deffn {Procedure} set-texture-blend-mode! texture blend-mode +Set the blend of @var{texture} to @var{blend-mode}. @xref{Blend +Modes} for more information. +@end deffn + @node Blend Modes @section Blend Modes diff --git a/sdl2/bindings.scm b/sdl2/bindings.scm index 8d85c63..7f12b45 100644 --- a/sdl2/bindings.scm +++ b/sdl2/bindings.scm @@ -321,6 +321,9 @@ RETURN-TYPE and accept arguments of ARG-TYPES." (define-foreign sdl-get-texture-alpha-mod int "SDL_GetTextureAlphaMod" '(* *)) +(define-foreign sdl-set-texture-blend-mode + int "SDL_SetTextureBlendMode" (list '* int)) + (define-foreign sdl-set-render-draw-blend-mode int "SDL_SetRenderDrawBlendMode" (list '* int)) diff --git a/sdl2/render.scm b/sdl2/render.scm index e12fad1..5c3b9b0 100644 --- a/sdl2/render.scm +++ b/sdl2/render.scm @@ -403,6 +403,12 @@ TEXTURE." (bytevector-uint-ref bv (* 2 (sizeof int)) (native-endianness) (sizeof int)) (bytevector-uint-ref bv (* 3 (sizeof int)) (native-endianness) (sizeof int))))) +(define (set-texture-blend-mode! texture blend-mode) + (unless (zero? (ffi:sdl-set-texture-blend-mode + (unwrap-texture texture) + ((@@ (sdl2 blend-mode) blend-mode-bitmask) blend-mode))) + (sdl-error "set-texure-blend-mode!" "Failed to set texture blend mode"))) + (define (set-texture-color-mod! texture r g b) "Get color mod of TEXTURE as a list of the integers." (unless (zero? (ffi:sdl-set-texture-color-mod (unwrap-texture texture) r g b)) |