1 files changed, 148 insertions, 0 deletions
diff --git a/chromium/third_party/skia/tools/lua/bbh_filter.lua b/chromium/third_party/skia/tools/lua/bbh_filter.lua
new file mode 100644
index 00000000000..73b530c7c75
--- /dev/null
+++ b/chromium/third_party/skia/tools/lua/bbh_filter.lua
@@ -0,0 +1,148 @@
+-- bbh_filter.lua
+--
+-- This script outputs info about 'interesting' skp files,
+-- where the definition of 'interesting' changes but is roughly:
+-- "Interesting for bounding box hierarchy benchmarks."
+--
+-- Currently, the approach is to output, in equal ammounts, the names of the files that
+-- have most commands, and the names of the files that use the least popular commands.
+
+function count_entries(table)
+    local count = 0
+    for _,_ in pairs(table) do
+        count = count + 1
+    end
+    return count
+end
+
+verbCounts = {}
+
+function reset_current()
+    -- Data about the skp in transit
+    currentInfo = {
+        fileName = '',
+        verbs = {},
+        numOps = 0
+    }
+end
+reset_current()
+
+numOutputFiles = 10  -- This is per measure.
+globalInfo = {}  -- Saves currentInfo for each file to be used at the end.
+output = {}  -- Stores {fileName, {verb, count}} tables.
+
+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
+
+function sk_scrape_startcanvas(c, fileName) end
+
+function sk_scrape_endcanvas(c, fileName)
+    globalInfo[fileName] = currentInfo
+    globalInfo[fileName].fileName = fileName
+    reset_current()
+end
+
+function sk_scrape_accumulate(t)
+    -- dump the params in t, specifically showing the verb first, which we
+    -- then nil out so it doesn't appear in tostr()
+    --
+    verbCounts[t.verb] = (verbCounts[t.verb] or 0) + 1
+    currentInfo.verbs[t.verb] = (currentInfo.verbs[t.verb] or 0) + 1
+    currentInfo.numOps = currentInfo.numOps + 1
+
+    t.verb = nil
+end
+
+function sk_scrape_summarize()
+    verbWeights = {}  -- {verb, weight}, where 0 < weight <= 1
+
+    meta = {}
+    for k,v in pairs(verbCounts) do
+        table.insert(meta, {key=k, value=v})
+    end
+    table.sort(meta, function (a,b) return a.value > b.value; end)
+    maxValue = meta[1].value
+    io.write("-- ==================\n")
+    io.write("------------------------------------------------------------------ \n")
+    io.write("-- Command\t\t\tNumber of calls\t\tPopularity\n")
+    io.write("------------------------------------------------------------------ \n")
+    for k, v in pairs(meta) do
+        verbWeights[v.key] = v.value / maxValue
+
+        -- Poor man's formatting:
+        local padding = "\t\t\t"
+        if (#v.key + 3) < 8 then
+            padding = "\t\t\t\t"
+        end
+        if (#v.key + 3) >= 16 then
+            padding = "\t\t"
+        end
+
+        io.write ("-- ",v.key, padding, v.value, '\t\t\t', verbWeights[v.key], "\n")
+    end
+
+    meta = {}
+    function calculate_weight(verbs)
+        local weight = 0
+        for name, count in pairs(verbs) do
+            weight = weight + (1 / verbWeights[name]) * count
+        end
+        return weight
+    end
+    for n, info in pairs(globalInfo) do
+        table.insert(meta, info)
+    end
+
+    local visitedFiles = {}
+
+    -- Prints out information in lua readable format
+    function output_with_metric(metric_func, description, numOutputFiles)
+        table.sort(meta, metric_func)
+        print(description)
+        local iter = 0
+        for i, t in pairs(meta) do
+            if not visitedFiles[t.fileName] then
+                visitedFiles[t.fileName] = true
+                io.write ("{\nname = \"", t.fileName, "\", \nverbs = {\n")
+                for verb,count in pairs(globalInfo[t.fileName].verbs) do
+                    io.write('    ', verb, " = ", count, ",\n")
+                end
+                io.write("}\n},\n")
+
+                iter = iter + 1
+                if iter >= numOutputFiles then
+                    break
+                end
+            end
+        end
+    end
+
+    output_with_metric(
+        function(a, b) return calculate_weight(a.verbs) > calculate_weight(b.verbs); end,
+        "\n-- ================== skps with calling unpopular commands.", 10)
+    output_with_metric(
+        function(a, b) return a.numOps > b.numOps; end,
+        "\n-- ================== skps with the most calls.", 50)
+
+    local count = count_entries(visitedFiles)
+
+    print ("-- Spat", count, "files")
+end
+