| bcb024df56c8ae7a5914d6f060ac99a2b5d118d9 |
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18-Feb-2016 |
Seigo Nonaka <nona@google.com> |
Merge "Improve Paint.measureText and Paint.hasGlyph for variation sequences." into nyc-dev
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| 6b1c227da6492a435f0341d7fe95d9992669920e |
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02-Feb-2016 |
Seigo Nonaka <nona@google.com> |
Improve Paint.measureText and Paint.hasGlyph for variation sequences.
Before this patch, the font fallback chain iterated all installed font
families if a variation selector was specified.
This CL narrows down the range of iteration.
To decide the font family for the variation sequence, we need to search
for both the variation sequence and its base code point.
The new range of the iteration is a union of them.
With this change, the running time of Paint.hasGlyph for the variation
sequence improves 50% and the running time of Paint.measureText for the
variation sequence improves 40% for the large text case on Nexus 6
userdebug.
Bug: 26784699
Bug: 11750374
Change-Id: Iced1349e3ca750821d8882c551551f65bb569794
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
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| 734f037130e14b3d44bc74026d3d065c025a8280 |
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11-Feb-2016 |
Raph Levien <raph@google.com> |
Add error logging on invalid cmap
This patch logs instances of fonts with invalid cmap tables.
Bug: 25645298
Bug: 26413177
Change-Id: I183985e9784a97a2b4307a22e036382b1fc90e5e
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
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| 3034e8b4ab627278b88faae2f4813562f31a7c2b |
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15-Jan-2016 |
Raph Levien <raph@google.com> |
Reject fonts with invalid ranges in cmap
am: ca8ac8acda
* commit 'ca8ac8acdad662230ae37998c6c4091bb39402b6':
Reject fonts with invalid ranges in cmap
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| ca8ac8acdad662230ae37998c6c4091bb39402b6 |
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06-Jan-2016 |
Raph Levien <raph@google.com> |
Reject fonts with invalid ranges in cmap
A corrupt or malicious font may have a negative size in its cmap
range, which in turn could lead to memory corruption. This patch
detects the case and rejects the font, and also includes an assertion
in the sparse bit set implementation if we missed any such case.
External issue:
https://code.google.com/p/android/issues/detail?id=192618
Bug: 26413177
Change-Id: Icc0c80e4ef389abba0964495b89aa0fae3e9f4b2
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
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| 73abbd59344770601991248cc56846cd199812b8 |
|
06-Jan-2016 |
Raph Levien <raph@google.com> |
Reject fonts with invalid ranges in cmap
A corrupt or malicious font may have a negative size in its cmap
range, which in turn could lead to memory corruption. This patch
detects the case and rejects the font, and also includes an assertion
in the sparse bit set implementation if we missed any such case.
External issue:
https://code.google.com/p/android/issues/detail?id=192618
Bug: 26413177
Change-Id: Icc0c80e4ef389abba0964495b89aa0fae3e9f4b2
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
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| 998293f985dc6c23f90b160f3bc647807c76d3fe |
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08-Dec-2015 |
Raph Levien <raph@google.com> |
Avoid integer overflows in parsing fonts
am: 6299a6ba13
* commit '6299a6ba13906c695f7a4f6748f7bc5856a110e5':
Avoid integer overflows in parsing fonts
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| 6299a6ba13906c695f7a4f6748f7bc5856a110e5 |
|
01-Dec-2015 |
Raph Levien <raph@google.com> |
Avoid integer overflows in parsing fonts
A malformed TTF can cause size calculations to overflow. This patch
checks the maximum reasonable value so that the total size fits in 32
bits. It also adds some explicit casting to avoid possible technical
undefined behavior when parsing sized unsigned values.
Bug: 25645298
Change-Id: Id4716132041a6f4f1fbb73ec4e445391cf7d9616
(cherry picked from commit 183c9ec2800baa2ce099ee260c6cbc6121cf1274)
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
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| 183c9ec2800baa2ce099ee260c6cbc6121cf1274 |
|
01-Dec-2015 |
Raph Levien <raph@google.com> |
Avoid integer overflows in parsing fonts
A malformed TTF can cause size calculations to overflow. This patch
checks the maximum reasonable value so that the total size fits in 32
bits. It also adds some explicit casting to avoid possible technical
undefined behavior when parsing sized unsigned values.
Bug: 25645298
Change-Id: Id4716132041a6f4f1fbb73ec4e445391cf7d9616
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
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| 5f11abd31fa8cfa723f54bd1c98ce4e27e7d3c77 |
|
23-Oct-2014 |
Raph Levien <raph@google.com> |
Silently ignore invalid rangeOffset values
Some fonts contain a cmap segment for char 0xffff that contains an
invalid rangeOffset. This was rejected by the existing code, which
means the font is considered to have empty Unicode coverage. This patch
just discards the invalid segment (consistent with OpenType Sanitizer),
making the custom font display.
Bug: 18106256
Change-Id: Icc8616a3030f80e62db906332be64d434ae72ea2
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
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| 9cc9bbe1461f359f0b27c5e7645c17dda001ab1d |
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24-Apr-2013 |
Raph Levien <raph@google.com> |
Initial commit of Minikin library
This is the initial draft of Minikin, a library intended to perform text
layout functions. This version does basic weight selection and font runs
for scripts, and also has a simple renderer for drawing into bitmaps,
but is lacking measurement, line breaking, and a number of other
important features. It also lacks caching and other performance
refinements.
Change-Id: I789a2e47d11d71202dc84b4751b51a5e2cd9c451
/frameworks/minikin/libs/minikin/CmapCoverage.cpp
|