Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 21ab6bc788f21a099b61fa1ead9f7ba048d7c687
https://github.com/WebKit/WebKit/commit/21ab6bc788f21a099b61fa1ead9f7ba048d7c687
Author: Myles C. Maxfield <[email protected]>
Date: 2023-05-31 (Wed, 31 May 2023)
Changed paths:
M Source/WebCore/Configurations/WebCore.xcconfig
M Source/WebCore/PAL/pal/spi/cf/CoreTextSPI.h
M
Source/WebCore/platform/graphics/coretext/FontCustomPlatformDataCoreText.cpp
A WebKitLibraries/WebKitPrivateFrameworkStubs/Mac/101500/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/Mac/101600/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/Mac/110000/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/Mac/120000/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/Mac/130000/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/appletvos/15/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/appletvos/16/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/iOS/15/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/iOS/16/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/watchos/8/libFontParser.tbd
A WebKitLibraries/WebKitPrivateFrameworkStubs/watchos/9/libFontParser.tbd
Log Message:
-----------
[Cocoa] [GPUP] Compressed fonts are decompressed twice, which is one too many
times
https://bugs.webkit.org/show_bug.cgi?id=257401
rdar://109910582
Reviewed by David Kilzer.
Previously, the way we were sharing web fonts between the web process and the
GPU process is
by simply transferring the bytes of the file, and asking Core Text to open the
data. Both
processes need to use the font, so this means Core Text was being asked to open
the data twice.
This actually has somewhat significant cost, as many fonts are compressed, and
simply opening
it has to decompress the file.
This patch uses an SPI function to produce the decompressed bytes, without
opening the font.
This allows us to retain the decompressed bytes, and send them to the GPU
process. By
decompressing early, we can decompress once, and then use the decompressed
bytes everywhere.
This means we only have to decompress fonts once.
* Source/WebCore/PAL/pal/spi/cf/CoreTextSPI.h:
* Source/WebCore/platform/graphics/coretext/FontCustomPlatformDataCoreText.cpp:
(WebCore::createFontCustomPlatformData):
Canonical link: https://commits.webkit.org/264724@main
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