Compute full text layout in MeasuredText and use it for drawing

The full layout is required for drawing text on UI thread.
To save this work, store the full layout result in MeasuredText and
compose the final layout from stored full layout if possible.

Currently justification/hyphenation is not supported but works normally
as before. Nothing changes on existing non measured text.

StaticLayout creation time for no style text (w/o patch -> w/ patch, N=30)
  MeasuredText Balanced Hyphenation  :    721,297 ->    720,657: (-0.1%)
  MeasuredText Balanced NoHyphenation:    550,588 ->    546,069: (-0.8%)
  MeasuredText Greedy Hyphenation    :    503,582 ->    498,009: (-1.1%)
  MeasuredText Greedy NoHyphenation  :    502,344 ->    498,507: (-0.8%)
  RandomText Balanced Hyphenation    : 19,351,802 -> 19,176,024: (-0.9%)
  RandomText Balanced NoHyphenation  :  8,033,830 ->  7,973,336: (-0.8%)
  RandomText Greedy Hyphenation      :  7,957,335 ->  7,927,316: (-0.4%)
  RandomText Greedy NoHyphenation    :  7,988,884 ->  7,929,717: (-0.7%)

StaticLayout.draw time for no style text (w/o patch -> w/ patch, N=30)
  MeasuredText NoStyled              :    644,453 ->    660,684: (+2.5%)
  MeasuredText NoStyled WithoutCache :  9,251,919 ->    648,992: (-93.0%)
  MeasuredText Styled                :  3,092,353 ->    870,702: (-71.8%)
  MeasuredText Styled WithoutCache   : 12,544,014 ->  1,114,557: (-91.1%)
  RandomText NoStyled                :    582,167 ->    572,092: (-1.7%)
  RandomText NoStyled WithoutCache   :  9,167,670 ->  9,056,447: (-1.2%)
  RandomText Styled                  :  3,064,490 ->  3,029,028: (-1.2%)
  RandomText Styled WithoutCache     : 12,314,863 -> 12,283,026: (-0.3%)

Test: minikin_test
Test: bit CtsTextTestCases:*
Test: bit CtsWidgetTestCases:android.widget.cts.TextViewTest
Test: bit FrameworksCoreTests:android.text.MeasuredParagraphTest
Bug: 63897135

Change-Id: I7e6ec5c953d7d0f767aba4f61f94e62b6f3a3a2b

0 files changed, 0 insertions, 0 deletions