From 392a0c5a4d19da8f06b3ccab8b9d7fdcd558e64d Mon Sep 17 00:00:00 2001
From: Brian Jordan <brian@laptop.org>
Date: Fri, 27 Jun 2008 18:17:45 +0000
Subject: Initial commit

---
(limited to 'olpcgames/svgsprite.py')

diff --git a/olpcgames/svgsprite.py b/olpcgames/svgsprite.py
new file mode 100755
index 0000000..e47eed2
--- /dev/null
+++ b/olpcgames/svgsprite.py
@@ -0,0 +1,52 @@
+"""RSVG/Cairo-based rendering of SVG into Pygame Images"""
+from pygame import sprite, Rect
+from olpcgames import svg
+
+class SVGSprite( sprite.Sprite ):
+    """Sprite class which renders SVG source-code as a Pygame image
+    
+    Note:
+    
+        Currently this sprite class is a bit over-engineered, it gets in the way 
+        if you want to, e.g. animate among a number of SVG drawings, as it 
+        assumes that setSVG will always set a single SVG file for rendering.
+    """
+    rect = image = None
+    resolution = None
+    def __init__( 
+        self, svg=None, size=None, *args
+    ):
+        """Initialise the svg sprite
+        
+        svg -- svg source text (i.e. content of an svg file)
+        size -- optional, to constrain size, (width,height), leaving one 
+            as None or 0 causes proportional scaling, leaving both 
+            as None or 0 causes natural scaling (screen resolution)
+        args -- if present, groups to which to automatically add
+        """
+        self.size = size
+        super( SVGSprite, self ).__init__( *args )
+        if svg:
+            self.setSVG( svg )
+    def setSVG( self, svg ):
+        """Set our SVG source"""
+        self.svg = svg
+        # XXX could delay this until actually asked to display...
+        if self.size:
+            width,height = self.size
+        else:
+            width,height = None,None
+        self.image = svg.render( self.svg, (width,height) ).convert_alpha()
+        rect = self.image.get_rect()
+        if self.rect:
+            rect.move( self.rect ) # should let something higher-level do that...
+        self.rect = rect 
+    def copy( self ):
+        """Create a copy of this sprite without reloading the svg image"""
+        result = self.__class__(
+            size = self.size
+        )
+        result.image = self.image 
+        result.rect = Rect(self.rect)
+        result.resolution = self.resolution
+        return result
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