diff options
Diffstat (limited to 'sdl2/render.scm')
| -rw-r--r-- | sdl2/render.scm | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/sdl2/render.scm b/sdl2/render.scm index 57a0e17..d48d938 100644 --- a/sdl2/render.scm +++ b/sdl2/render.scm @@ -50,6 +50,11 @@ render-fill-rect render-fill-rects + set-texture-color-mod! + get-texture-color-mod + set-texture-alpha-mod! + get-texture-alpha-mod + make-texture delete-texture! surface->texture)) @@ -238,6 +243,39 @@ created with 'texture')" "Free the memory used by TEXTURE." (ffi:sdl-destroy-texture (unwrap-texture texture))) +(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)) + (sdl-error "set-texture-color-mod!" "Failed to set texture color mod"))) + +(define (set-texture-alpha-mod! texture a) + "Sets alpha mod of TEXTURE." + (unless (zero? (ffi:sdl-set-texture-alpha-mod (unwrap-texture texture) a)) + (sdl-error "set-texture-alpha-mod!" "Failed to set texture alpha mod"))) + +(define (get-texture-alpha-mod texture) + "Get alpha mod of TEXTURE as a single integer." + (let ((bv (make-bytevector 1))) + (let ((result (ffi:sdl-get-texture-alpha-mod + (unwrap-texture texture) + (bytevector->pointer bv 0)))) + (unless (zero? result) + (sdl-error "get-texture-alpha-mod" "Failed to get texture allpha mod")) + + (bytevector-u8-ref bv 0)))) + +(define (get-texture-color-mod texture) + "Get color mod of TEXTURE as a list of the integers." + (let ((bv (make-bytevector 3))) + (let ((result (ffi:sdl-get-texture-color-mod + (unwrap-texture texture) + (bytevector->pointer bv 0) + (bytevector->pointer bv 1) + (bytevector->pointer bv 2)))) + (unless (zero? result) + (sdl-error "get-texture-color-mod" "Failed to get texture color mod")) + (bytevector->u8-list bv)))) + (define* (render-copy renderer texture #:key (angle 0) srcrect dstrect center) "Copy TEXTURE to the rendering target of RENDERER." |