forked from minhngoc25a/freetype2
a5f33eeb8a
When building for ARMv7 with thumb2 instructions, the optimized
`FT_MulFix_arm' assembly routine was not being used.
The reason for this is in the `ftconfig.h' header, namely:
- The assembly routine uses the `smull' instruction which is not
available when generating Thumb-1 machine code. It is available
in Thumb-2 mode, though.
- The header was written a long time ago before Thumb-2 became
widely popular (e.g. with Android). So it simply doesn't use the
assembly routine if the `__thumb__' built-in macro is defined.
- When compiling in Thumb-2 mode, the compiler will define both
`__thumb__' and `__thumb2__'.
By checking for `(__thumb2__ || !__thumb__)', we ensure that the
assembly routine is only avoided when generating Thumb-1 code.
Given that this is performance-sensitive function, this improves
`ftbench' as follows on a Galaxy Nexus:
Before (us/op) After (us/op)
- loading Arial.ttf glyphs at 14 ppem [1]
Load 34.285 33.098
- same operation with the light auto-hinter [2]
Load 31.317 29.590
- same operation without hinting [3]
Load 6.143 5.376
- loading Arial.ttf advances at 14 ppem [4]
Load_Advances (normal) 34.216 33.016
Load_Advances (fast) 0.176 0.176
[1] ftbench -t 5 -p -s 14 -b a -f 0008 Arial.ttf
[2] ftbench -t 5 -p -s 14 -b a -r 1 -f 0028 Arial.ttf
[3] ftbench -t 5 -p -s 14 -b a -f 000a Arial.ttf
[4] ftbench -t 5 -p -s 14 -b b -f 0008 Arial.ttf
* builds/unix/ftconfig.in, include/freetype/config/ftconfig.h
(FT_MULFIX_ASSEMBLER): Fix handling for ARMv7.
|
||
|---|---|---|
| builds | ||
| devel | ||
| docs | ||
| include | ||
| objs | ||
| src | ||
| .gitignore | ||
| .mailmap | ||
| ChangeLog | ||
| ChangeLog.20 | ||
| ChangeLog.21 | ||
| ChangeLog.22 | ||
| ChangeLog.23 | ||
| Jamfile | ||
| Jamrules | ||
| Makefile | ||
| README | ||
| README.git | ||
| autogen.sh | ||
| configure | ||
| modules.cfg | ||
| version.sed | ||
| vms_make.com | ||
README
FreeType 2.5.0
==============
Homepage: http://www.freetype.org
FreeType is a freely available software library to render fonts.
It is written in C, designed to be small, efficient, highly
customizable, and portable while capable of producing high-quality
output (glyph images) of most vector and bitmap font formats.
Please read the docs/CHANGES file, it contains IMPORTANT
INFORMATION.
Read the files `docs/INSTALL*' for installation instructions; see
the file `docs/LICENSE.TXT' for the available licenses.
The FreeType 2 API reference is located in `docs/reference'; use the
file `ft2-doc.html' as the top entry point. Additional
documentation is available as a separate package from our sites. Go
to
http://download.savannah.gnu.org/releases/freetype/
and download one of the following files.
freetype-doc-2.5.0.tar.bz2
freetype-doc-2.5.0.tar.gz
ftdoc250.zip
To view the documentation online, go to
http://www.freetype.org/freetype2/documentation.html
Mailing Lists
=============
The preferred way of communication with the FreeType team is using
e-mail lists.
general use and discussion: freetype@nongnu.org
engine internals, porting, etc.: freetype-devel@nongnu.org
announcements: freetype-announce@nongnu.org
The lists are moderated; see
http://www.freetype.org/contact.html
how to subscribe.
Bugs
====
Please report bugs by e-mail to `freetype-devel@nongnu.org'. Don't
forget to send a detailed explanation of the problem -- there is
nothing worse than receiving a terse message that only says `it
doesn't work'.
Alternatively, you may submit a bug report at
https://savannah.nongnu.org/bugs/?group=freetype
Enjoy!
The FreeType Team
----------------------------------------------------------------------
Copyright 2006-2013 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of README ---