Don't uselessly change the filter when drawing (bug 1508765)

[calixteman]

When profiling the pdf in https://bugzilla.mozilla.org/show_bug.cgi?id=1508765, I noticed that half a second was spent to set the filter to "none".

[Snuffleupagus]

Should we perhaps do the same thing in e.g. the following code as well?

pdf.js/src/display/canvas.js

Line 793 in a079f9c

ctx.filter = "none";

[Snuffleupagus]

r=me, thank you!

[calixteman]

/botio test

[moz-tools-bot]

From: Bot.io (Linux m4)

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Received

Command cmd_test from @calixteman received. Current queue size: 0

Live output at: http://54.241.84.105:8877/439d2d9829418d0/output.txt

[moz-tools-bot]

From: Bot.io (Windows)

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Received

Command cmd_test from @calixteman received. Current queue size: 1

Live output at: http://54.193.163.58:8877/9639e17945ad0d3/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

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Failed

Full output at http://54.241.84.105:8877/439d2d9829418d0/output.txt

Total script time: 25.11 mins

• Font tests: Passed
• Unit tests: Passed
• Integration Tests: FAILED
• Regression tests: FAILED

  different ref/snapshot: 16

Image differences available at: http://54.241.84.105:8877/439d2d9829418d0/reftest-analyzer.html#web=eq.log

[moz-tools-bot]

From: Bot.io (Windows)

---

Failed

Full output at http://54.193.163.58:8877/9639e17945ad0d3/output.txt

Total script time: 38.71 mins

• Font tests: Passed
• Unit tests: Passed
• Integration Tests: FAILED
• Regression tests: FAILED

  different ref/snapshot: 33

Image differences available at: http://54.193.163.58:8877/9639e17945ad0d3/reftest-analyzer.html#web=eq.log