allow multiple lua files to be used in lua_pictures

begin "stdlib" for skia in lua
add comments to scrape.lua



git-svn-id: http://skia.googlecode.com/svn/trunk@9206 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 81 insertions, 0 deletions

diff --git a/tools/lua/skia.lua b/tools/lua/skia.lua
new file mode 100644
index 0000000000..88c3223299
--- /dev/null
+++ b/tools/lua/skia.lua
@@ -0,0 +1,81 @@
+Sk = {}
+
+function Sk.isFinite(x)
+    return x * 0 == 0
+end
+
+-------------------------------------------------------------------------------
+
+Sk.Rect = { left = 0, top = 0, right = 0, bottom = 0 }
+Sk.Rect.__index = Sk.Rect
+
+function Sk.Rect.new(l, t, r, b)
+    local rect
+    if r then
+        -- 4 arguments
+        rect = { left = l, top = t, right = r, bottom = b }
+    elseif l then
+        -- 2 arguments
+        rect = { right = l, bottom = t }
+    else
+        -- 0 arguments
+        rect = {}
+    end
+    setmetatable(rect, Sk.Rect)
+    return rect;
+end
+
+function Sk.Rect:width()
+    return self.right - self.left
+end
+
+function Sk.Rect:height()
+    return self.bottom - self.top
+end
+
+function Sk.Rect:isEmpty()
+    return self:width() <= 0 or self:height() <= 0
+end
+
+function Sk.Rect:isFinite()
+    local value = self.left * 0
+    value = value * self.top
+    value = value * self.right
+    value = value * self.bottom
+    return 0 == value
+end
+
+function Sk.Rect:setEmpty()
+    self.left = 0
+    self.top = 0
+    self.right = 0
+    self.bottom = 0
+end
+
+function Sk.Rect:set(l, t, r, b)
+    self.left = l
+    self.top = t
+    self.right = r
+    self.bottom = b
+end
+
+function Sk.Rect:offset(dx, dy)
+    dy = dy or dx
+
+    self.left = self.left + dx
+    self.top = self.top + dy
+    self.right = self.right + dx
+    self.bottom = self.bottom + dy
+end
+
+function Sk.Rect:inset(dx, dy)
+    dy = dy or dx
+
+    self.left = self.left + dx
+    self.top = self.top + dy
+    self.right = self.right - dx
+    self.bottom = self.bottom - dy
+end
+
+-------------------------------------------------------------------------------
+