Add scraper to find paths that fallback to software

Add scraper to find paths that fallback to software

Committed: https://skia.googlesource.com/skia/+/0f149e5a78842c920c0ce1e1ac45f54473c11f05

[robertphillips, 2014-08-15 12:34:18]

I think you should also count the total number of clips since you will be over
reporting the % of draw ops that are concave.

https://codereview.chromium.org/475433004/diff/1/tools/lua/paths.lua
File tools/lua/paths.lua (right):

https://codereview.chromium.org/475433004/diff/1/tools/lua/paths.lua#newcode1
tools/lua/paths.lua:1: function sk_scrape_startcanvas(c, fileName) end
Comment up here about what this tracks and why ??

https://codereview.chromium.org/475433004/diff/1/tools/lua/paths.lua#newcode45
tools/lua/paths.lua:45: 
if (string.starts(t.verb, "clip")) then
    clips = clips + 1
end

?

[krajcevski, 2014-08-15 15:13:52]

Output on most recent 10k set:

Number of clips: 746936
Number of draws: 6375958
Number of clipped paths: 42871
Number of drawn paths: 72794
Number of clipped software paths: 16
Number of drawn software paths: 34628
Percentage of paths needing software: 29.952016599663
Percentage of draws/clips needing software: 0.48637534125876

https://codereview.chromium.org/475433004/diff/1/tools/lua/paths.lua
File tools/lua/paths.lua (right):

https://codereview.chromium.org/475433004/diff/1/tools/lua/paths.lua#newcode1
tools/lua/paths.lua:1: function sk_scrape_startcanvas(c, fileName) end
On 2014/08/15 12:34:18, robertphillips wrote:
> Comment up here about what this tracks and why ??

Done.

https://codereview.chromium.org/475433004/diff/1/tools/lua/paths.lua#newcode45
tools/lua/paths.lua:45: 
On 2014/08/15 12:34:18, robertphillips wrote:
> if (string.starts(t.verb, "clip")) then
>     clips = clips + 1
> end
> 
> ?

Done.

[robertphillips, 2014-08-15 15:24:42]

lgtm

[krajcevski, 2014-08-15 15:32:45]

The CQ bit was checked by krajcevski@google.com

[commit-bot: I haz the power, 2014-08-15 15:33:41]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/krajcevski@google.com/475433004/20001

[krajcevski, 2014-08-15 15:46:30]

Results on the 1M dataset:

Number of clips: 52970366
Number of draws: 392621437
Number of clipped paths: 2684400
Number of drawn paths: 5398196
Number of clipped software paths: 2891
Number of drawn software paths: 2213510
Percentage of paths needing software: 27.42189514359
Percentage of draws/clips needing software: 0.49740614281453

[krajcevski, 2014-08-15 19:24:27]

The CQ bit was checked by krajcevski@google.com

[krajcevski, 2014-08-15 19:24:29]

The CQ bit was unchecked by krajcevski@google.com

[krajcevski, 2014-08-15 19:24:34]

The CQ bit was checked by krajcevski@google.com

[commit-bot: I haz the power, 2014-08-15 19:25:36]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/krajcevski@google.com/475433004/40001

[krajcevski, 2014-08-15 19:58:17]

Turns out that each shard runs the script on a bunch of SKPs at once, and this
doesn't really give accurate results. =(

Number of clips: 52970366
Number of draws: 392621437
Number of clipped paths: 2684400
Number of drawn paths: 5197621
Number of clipped software paths: 2891
Number of drawn software paths: 2213510

Number of SKPs total: 97
Number of SKPs that draw paths: 97
Number of SKPs that draw SW paths: 97


Percentage of paths needing software: 28.119704324563
Percentage of draws/clips needing software: 0.49740614281453

Percentage of SKPs that draw paths: 100
Percentage of SKPs that draw SW paths: 100

[krajcevski, 2014-08-15 20:15:08]

The CQ bit was unchecked by krajcevski@google.com

[krajcevski, 2014-08-15 20:22:05]

The CQ bit was checked by krajcevski@google.com

[krajcevski, 2014-08-15 20:22:32]

Number of clips: 52970366
Number of draws: 392621437
Number of clipped paths: 2684400
Number of drawn paths: 5197621
Number of clipped software paths: 2891
Number of drawn software paths: 2213510

Number of SKPs total: 783447
Number of SKPs that draw paths: 402108
Number of SKPs that draw SW paths: 151530


Percentage of paths needing software: 28.119704324563
Percentage of draws/clips needing software: 0.49740614281453

Percentage of SKPs that draw paths: 51.32548851422
Percentage of SKPs that draw SW paths: 19.341448751479

[commit-bot: I haz the power, 2014-08-15 20:22:57]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/krajcevski@google.com/475433004/60001

[commit-bot: I haz the power, 2014-08-18 14:52:29]

Committed patchset #4 (60001) as 0f149e5a78842c920c0ce1e1ac45f54473c11f05