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-rw-r--r--sdl2/surface.scm17
1 files changed, 16 insertions, 1 deletions
diff --git a/sdl2/surface.scm b/sdl2/surface.scm
index bcdb588..a918bd7 100644
--- a/sdl2/surface.scm
+++ b/sdl2/surface.scm
@@ -63,7 +63,8 @@
surface-height
surface-pitch
surface-pixels
- convert-surface-format))
+ convert-surface-format
+ blit-surface))
;;;
@@ -434,3 +435,17 @@ Valid format types are:
(if (null-pointer? ptr)
(sdl-error "convert-surface-format" "failed to convert surface format")
(wrap-surface ptr))))
+
+(define (blit-surface src src-rect dst dst-rect)
+ "Blit the rectangle SRC-RECT from the surface SRC to DST-RECT of the
+surface DST."
+ (unless (zero?
+ (ffi:sdl-blit-surface (unwrap-surface src)
+ (if src-rect
+ ((@@ (sdl2 rect) unwrap-rect) src-rect)
+ %null-pointer)
+ (unwrap-surface dst)
+ (if dst-rect
+ ((@@ (sdl2 rect) unwrap-rect) dst-rect)
+ %null-pointer)))
+ (sdl-error "blit-surface" "failed to blit surface ~a to ~a" src dst)))