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function sk_scrape_startcanvas(c, fileName) end
function sk_scrape_endcanvas(c, fileName) end
SkScalarNearlyZero = 1.0 / bit32.lshift(1.0, 12)
function SkScalarNearlyEqual(a, b)
return math.abs(a,b) <= SkScalarNearlyZero
end
gradients = {}
i = 1
function sk_scrape_accumulate(t)
local p = t.paint
if p then
local s = p:getShader()
if s then
local g = s:asAGradient()
if g then
gradients[i] = {}
gradients[i].colorCount = g.colorCount
gradients[i].type = g.type
gradients[i].tile = g.tile
numHardStops = 0
isEvenlySpaced = true
for j = 2, g.colorCount, 1 do
if not SkScalarNearlyEqual(g.positions[j], j/(g.colorCount-1)) then
isEvenlySpaced = false
end
if SkScalarNearlyEqual(g.positions[j], g.positions[j-1]) then
numHardStops = numHardStops + 1
end
end
gradients[i].isEvenlySpaced = isEvenlySpaced
gradients[i].numHardStops = numHardStops;
gradients[i].positions = {}
for j = 1, g.colorCount, 1 do
gradients[i].positions[j] = g.positions[j]
end
i = i + 1
end
end
end
end
function sk_scrape_summarize()
for k, v in pairs(gradients) do
local pos = ""
for j = 1, v.colorCount , 1 do
pos = pos .. v.positions[j]
if j ~= v.colorCount then
pos = pos .. ","
end
end
io.write(string.format("%d %s %s %d %d %s\n",
v.colorCount,
v.type,
v.tile,
tonumber(v.isEvenlySpaced and 1 or 0),
v.numHardStops,
pos))
end
end
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