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function tostr(t)
local str = ""
for k, v in next, t do
if #str > 0 then
str = str .. ", "
end
if type(k) == "number" then
str = str .. "[" .. k .. "] = "
else
str = str .. tostring(k) .. " = "
end
if type(v) == "table" then
str = str .. "{ " .. tostr(v) .. " }"
else
str = str .. tostring(v)
end
end
return str
end
local total_found = {} -- accumulate() stores its data in here
local total_total = {}
local canvas -- holds the current canvas (from startcanvas())
--[[
startcanvas() is called at the start of each picture file, passing the
canvas that we will be drawing into, and the name of the file.
Following this call, there will be some number of calls to accumulate(t)
where t is a table of parameters that were passed to that draw-op.
t.verb is a string holding the name of the draw-op (e.g. "drawRect")
when a given picture is done, we call endcanvas(canvas, fileName)
]]
function sk_scrape_startcanvas(c, fileName)
canvas = c
end
--[[
Called when the current canvas is done drawing.
]]
function sk_scrape_endcanvas(c, fileName)
canvas = nil
end
function increment(table, key)
table[key] = (table[key] or 0) + 1
end
local drawPointsTable = {}
local drawPointsTable_direction = {}
function sk_scrape_accumulate(t)
increment(total_total, t.verb)
local p = t.paint
if p then
local pe = p:getPathEffect();
if pe then
increment(total_found, t.verb)
end
end
if "drawPoints" == t.verb then
local points = t.points
increment(drawPointsTable, #points)
if 2 == #points then
if points[1].y == points[2].y then
increment(drawPointsTable_direction, "hori")
elseif points[1].x == points[2].x then
increment(drawPointsTable_direction, "vert")
else
increment(drawPointsTable_direction, "other")
end
end
end
end
--[[
lua_pictures will call this function after all of the pictures have been
"accumulated".
]]
function sk_scrape_summarize()
for k, v in next, total_found do
io.write(k, " = ", v, "/", total_total[k], "\n")
end
print("histogram of point-counts for all drawPoints calls")
print(tostr(drawPointsTable))
print(tostr(drawPointsTable_direction))
end
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