Add SDL2_image bindings.

* sdl2/bindings/image.scm: New file.
* sdl2/image.scm: New file.
* Makefile.am (SOURCES): Add them.

1 files changed, 51 insertions, 0 deletions

diff --git a/sdl2/image.scm b/sdl2/image.scm
new file mode 100644
index 0000000..e741a04
--- /dev/null
+++ b/sdl2/image.scm
@@ -0,0 +1,51 @@
+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of guile-sdl2.
+;;;
+;;; Guile-sdl2 is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-sdl2 is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with guile-sdl2.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Image loading.
+;;
+;;; Code:
+
+(define-module (sdl2 image)
+  #:use-module (system foreign)
+  #:use-module (sdl2)
+  #:use-module ((sdl2 bindings image) #:prefix ffi:)
+  #:export (image-init
+            image-quit
+            load-image))
+
+(define (image-init)
+  "Initialize dynamically loaded image libraries."
+  (ffi:img-init (logior ffi:IMG_INIT_JPG
+                        ffi:IMG_INIT_PNG
+                        ffi:IMG_INIT_TIF
+                        ffi:IMG_INIT_WEBP))
+  *unspecified*)
+
+(define (image-quit)
+  "Clean up dynamically loaded image libraries."
+  (ffi:img-quit))
+
+(define (load-image file)
+  "Load the image in FILE and return an SDL surface."
+  (let ((ptr (ffi:img-load (string->pointer file))))
+    (if (null-pointer? ptr)
+        (sdl-error "load-image" "failed to load image: ~a" file)
+        ((@@ (sdl2 surface) wrap-surface) ptr))))