report back colorfilters in lua

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/1498293002

1 files changed, 91 insertions, 0 deletions

diff --git a/tools/lua/filter-counter.lua b/tools/lua/filter-counter.lua
new file mode 100644
index 0000000000..f678bbd523
--- /dev/null
+++ b/tools/lua/filter-counter.lua
@@ -0,0 +1,91 @@
+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 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
+
+--[[
+    Called with the parameters to each canvas.draw call, where canvas is the
+    current canvas as set by startcanvas()
+]]
+
+local gCF_Count = 0
+local gIF_Count = 0
+local gBOTH_Count = 0
+
+function sk_scrape_accumulate(t)
+    if not t.paint then
+        return
+    end
+
+    local colorFilter = t.paint:getColorFilter()
+    local imageFilter = t.paint:getImageFilter()
+
+    if colorFilter then
+        gCF_Count = gCF_Count + 1
+    end
+    if imageFilter then
+        gIF_Count = gIF_Count + 1
+    end
+    if colorFilter and imageFilter then
+        gBOTH_Count = gBOTH_Count + 1
+    end
+end
+
+--[[
+    lua_pictures will call this function after all of the pictures have been
+    "accumulated".
+]]
+function sk_scrape_summarize()
+    io.write("colorfilters ", gCF_Count, ", imagefilters ", gIF_Count, ", both_filters ", gBOTH_Count, "\n")
+
+--[[
+    io.write("\n\nFirst glyph spread\n\n")
+    for k, v in next, gFirstGlyphs do
+        io.write("glyph, ", k, ",count, ", v, "\n")
+    end
+]]
+end
+
+function test_summary()
+    io.write("just testing test_summary\n")
+end
+