add more typeface methods to lua

resources/slides.lua

 gShowBounds = false
 
 gPath = "/skia/trunk/resources/"
 
 function load_file(file)
     local prev_path = package.path
     package.path = package.path .. ";" .. gPath .. file .. ".lua"
     require(file)
     package.path = prev_path
 end
@@ skipping 92 matching lines @@
         local node = slide[i]
         local paint = template[node.indent + 1].paint
         local extra_dy = template[node.indent + 1].extra_dy
         local fm = paint:getFontMetrics()
         local x_offset = -fm.ascent * node.indent * 1.25
 
         local bounds = make_rect(x + x_offset, y, 620, 640)
         local blob, newBottom = Sk.newTextBlob(node.text, bounds, paint)
         draw_bullet(canvas, x + x_offset, y - fm.ascent, paint, node.indent)
         canvas:drawTextBlob(blob, 0, 0, paint)
-        y = newBottom + paint:getTextSize() * .5
+        y = newBottom + paint:getTextSize() * .5 + extra_dy
 
         if gShowBounds then
             bounds.bottom = newBottom
             stroke_rect(canvas, bounds, {a=1,r=0,g=1,b=0})
             stroke_rect(canvas, blob:bounds(), {a=1,r=1,g=0,b=0})
         end
 
     end
 end
 
@@ skipping 10 matching lines @@
     title[1] = make_paint("Arial", 1, 45, { a=1, r=1, g=1, b=1 })
     title[1]:setTextAlign("center")
     title[2] = make_paint("Arial", 1, 25, { a=1, r=.75, g=.75, b=.75 })
     title[2]:setTextAlign("center")
 
     local slide = {
         margin_x = 20,
         margin_y = 25,
     }
     slide[1] = make_tmpl(make_paint("Arial", 1, 35, { a=1, r=1, g=1, b=1 }), 18)
-    slide[2] = make_tmpl(make_paint("Arial", 0, 25, { a=1, r=1, g=1, b=1 }), 0)
-    slide[3] = make_tmpl(make_paint("Arial", 0, 20, { a=1, r=.9, g=.9, b=.9 }), 0)
+    slide[2] = make_tmpl(make_paint("Arial", 0, 25, { a=1, r=1, g=1, b=1 }), 10)
+    slide[3] = make_tmpl(make_paint("Arial", 0, 20, { a=1, r=.9, g=.9, b=.9 }), 5)
 
     return {
         title = title,
         slide = slide,
         codePaint = make_paint("Courier", 0, 20, { a=1, r=.9, g=.9, b=.9 }),
     }
 end
 
 gTemplate = SkiaPoint_make_template()
 
@@ skipping 199 matching lines @@
 }
 
 function onCharHandler(uni)
     local proc = keyProcs[uni]
     if proc then
         proc()
         return true
     end
     return false
 end