Add gimp scripts

gimp/.gimp-2.8/scripts/half.scm

@@ -0,0 +1,46 @@
+(define (split-filename filename)
+  (let ((ext (memv #\. (string->list filename))))
+    (cons
+     (substring filename 0 (- (string-length filename) (length ext)))
+     (list->string (cdr ext)))))
+
+(define (string-minus str num)
+  (substring str 0 (- (string-length str) num)))
+
+(define (unretina-save image)
+  (let* ((parts (split-filename (car (gimp-image-get-filename image))))
+         (newname (string-append (string-minus (car parts) 3) "."
+                                 (cdr parts))))
+    (gimp-file-save RUN-NONINTERACTIVE image
+                    (car (gimp-image-get-active-drawable image))
+                    newname newname)))
+
+(define (unretina image)
+  (unretina-save (half image)))
+
+(define (half image)
+  (let ((newwidth (/ (car (gimp-image-width image)) 2))
+        (newheight (/ (car (gimp-image-height image)) 2)))
+    (gimp-image-scale image newwidth newheight))
+  (gimp-displays-flush)
+  image)
+
+(script-fu-register "half"
+                    "Halfsize image"
+                    "Reduce the size of an image to 50%"
+                    "Tom Willemse <tom@ryuslash.org>"
+                    "Tom Willemse"
+                    "2014-11-18"
+                    "RGB*, GRAY*"
+                    SF-IMAGE "Image" 0)
+(script-fu-menu-register "half" "<Image>/Picturefix")
+
+(script-fu-register "unretina"
+                    "Unretina image"
+                    "Reduce the size of an image and rename for non-retina displays."
+                    "Tom Willemse <tom@ryuslash.org>"
+                    "Tom Willemse"
+                    "2014-12-01"
+                    "RGB*, GRAY*"
+                    SF-IMAGE "Image" 0)
+(script-fu-menu-register "unretina" "<Image>/Picturefix")