New image functions:

* invert
 * flip_horizontal
 * flip_vertical
 * rotate

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1472 0fc631ac-6414-0410-93d0-97cfa31319b6

doc/function/flip_horizontal.txt

@@ -0,0 +1,18 @@
+Function: flip_horizontal
+
+--Usage--
+> flip_horizontal(input: image)
+
+Flip an image horizontally.
+
+--Parameters--
+! Parameter	Type			Description
+| @input@	[[type:image]]		Image to flip.
+
+--Examples--
+> flip_horizontal("image_logo.png")  ==  [[Image]]
+>>> flip_horizontal(<img src="image_logo.png" alt='"image_logo.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />) == <img src="image_logo_hflip.png" alt='"image_logo_hflip.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />
+
+--See also--
+| [[fun:flip_vertical]]		Flip an image vertically
+| [[fun:rotate]]		Rotate an image

doc/function/flip_vertical.txt

@@ -0,0 +1,18 @@
+Function: flip_vertical
+
+--Usage--
+> flip_vertical(input: image)
+
+Flip an image vertically.
+
+--Parameters--
+! Parameter	Type			Description
+| @input@	[[type:image]]		Image to flip.
+
+--Examples--
+> flip_vertical("image_logo.png")  ==  [[Image]]
+>>> flip_vertical(<img src="image_logo.png" alt='"image_logo.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />) == <img src="image_logo_vflip.png" alt='"image_logo_vflip.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />
+
+--See also--
+| [[fun:flip_horizontal]]	Flip an image horizontally
+| [[fun:rotate]]		Rotate an image

doc/function/index.txt

@@ -83,8 +83,12 @@ These functions are built into the program, other [[type:function]]s can be defi
 | [[fun:set_alpha]]		Change the transparency of an image.
 | [[fun:set_combine]]		Change how the image should be combined with the background.
 | [[fun:saturate]]		Saturate/desaturate an image.
+| [[fun:invert]]		Invert the colors of an image.
 | [[fun:enlarge]]		Enlarge an image by putting a border around it.
 | [[fun:crop]]			Crop an image, giving only a small subset of it.
+| [[fun:flip_horizontal]]	Flip an image horizontally.
+| [[fun:flip_vertical]]		Flip an image vertically.
+| [[fun:rotate]]		Rotate an image.
 | [[fun:drop_shadow]]		Add a drop shadow to an image.
 | [[fun:symbol_variation]]	Render a variation of a [[type:symbol]].
 | [[fun:built_in_image]]	Return an image built into the program.

doc/function/invert.txt

@@ -0,0 +1,14 @@
+Function: invert
+
+--Usage--
+> invert(input: image)
+
+Invert the colors in an image.
+
+--Parameters--
+! Parameter	Type			Description
+| @input@	[[type:image]]		Image to invert.
+
+--Examples--
+> invert("image_logo.png")  ==  [[Image]]
+>>> invert(<img src="image_logo.png" alt='"image_logo.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />) == <img src="image_logo_invert.png" alt='"image_logo_invert.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />

doc/function/rotate.txt

@@ -0,0 +1,19 @@
+Function: flip_vertical
+
+--Usage--
+> rotate(input: image, angle: some_number)
+
+Rotate an image. The image can become larger to accomodate the rotated bounding box.
+
+--Parameters--
+! Parameter	Type			Description
+| @input@	[[type:image]]		Image to rotate.
+| @angle@	[[type:double]]		Angle to rotate by, in degrees counter clockwise.
+
+--Examples--
+> rotate("image_logo.png", angle:30)  ==  [[Image]]
+>>> rotate(<img src="image_logo.png" alt='"image_logo.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />, angle:30) == <img src="image_logo_rotate30.png" alt='"image_logo_rotate30.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />
+
+--See also--
+| [[fun:flip_horizontal]]	Flip an image horizontally
+| [[fun:flip_vertical]]		Flip an image vertically

doc/function/saturate.txt

@@ -19,3 +19,5 @@ To desaturate use an amount between @0@ (no desaturation) and @-1@ (convert to g
 >>> saturate(<img src="image5.png" alt='"image5.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />, amount:  0.5) == <img src="image_saturate1.png" alt='"image_saturate1.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />
 > saturate("image5.png", amount: -0.5)  ==  [[Image]]
 >>> saturate(<img src="image5.png" alt='"image5.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />, amount: -0.5) == <img src="image_saturate2.png" alt='"image_saturate2.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />
+> saturate("image_logo.png", amount: -1)  ==  [[Image]]
+>>> saturate(<img src="image_logo.png" alt='"image_logo.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />, amount: -1) == <img src="image_logo_desaturate.png" alt='"image_logo_desaturate.png"' style="border:1px solid black;vertical-align:middle;margin:1px;" />