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CFX_FontCache refactoring:
after this CL: Only one global CFX_FontCache used. Any cached items from it, are released, when its are not used.
BUG=79367,48791
The fonts was not cleared after unloading pages.
Test pdf:
http://www.nasa.gov/pdf/750614main_NASA_FY_2014_Budget_Estimates-508.pdf
For this file, we have ~5 fonts per page, which equal ~1 Mb per page.
In this PDF we have 670 pages, as result after slow scrolling(reading) full document we have ~600 Mb fonts data in memory.
memory usage of PDF Plugin:
before this CL: ~660 Mb
after this CL: ~100 Mb
Review-Url: https://codereview.chromium.org/2158023002
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CFX_FaceCache::LookUpGlyphBitMap should remember its unsuccessful glyph
bitmap calculations. This is especially important if there are a lot of
repeated requests for the same glyph with large bitmaps (which means
long calculations in freetype). With this CL, the pdf in the bug below
will be rendered quickly.
BUG=chromium:638856
Review-Url: https://codereview.chromium.org/2338883004
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BUG=641333
Review-Url: https://codereview.chromium.org/2294183002
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Update the calculation of the outlines bold strength to use a CheckedNum instead of an int.
BUG=chromium:639506
Review-Url: https://codereview.chromium.org/2296193002
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Review-Url: https://codereview.chromium.org/2292503002
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Moved ScopedFontTransform from fx_ge_text namespace to fx_font
Moved some arrays used by both CFX_Font and CFX_FaceCache from fx_ge_text to
inside CFX_Font class
Review-Url: https://codereview.chromium.org/2263623002
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