[webkit-changes] [WebKit/WebKit] 58c01e: text-spacing: text-spacing-trim: Implement derived...

[Vitor Roriz]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 58c01e33d993c0522a6bd711dd21fb105959857d
      https://github.com/WebKit/WebKit/commit/58c01e33d993c0522a6bd711dd21fb105959857d
  Author: Vitor Roriz <vitor.roriz at apple.com>
  Date:   2024-10-15 (Tue, 15 Oct 2024)

  Changed paths:
    M Source/WebCore/platform/graphics/Font.cpp
    M Source/WebCore/platform/graphics/Font.h
    M Source/WebCore/platform/graphics/coretext/FontCoreText.cpp
    M Source/WebCore/platform/graphics/freetype/SimpleFontDataFreeType.cpp
    M Source/WebCore/platform/graphics/skia/FontSkia.cpp
    M Source/WebCore/platform/graphics/win/SimpleFontDataWin.cpp

  Log Message:
  -----------
  text-spacing: text-spacing-trim: Implement derived half-width font for CoreText platform
https://bugs.webkit.org/show_bug.cgi?id=281340
rdar://137770955

Reviewed by Sammy Gill.

This is a preparation patch for text-spacing-trim.
According to specification, trimming should be done
by using OpenType "halt" feature.

This patch creates a derived half-width font by
enabling the OpenType "halt" feature of an existent font.

It also implements a way to verify if a given font
supports such feature.

* Source/WebCore/platform/graphics/Font.cpp:
(WebCore::Font::halfWidthFont const):
(WebCore::Font::createHalfWidthFont const):
* Source/WebCore/platform/graphics/Font.h:
* Source/WebCore/platform/graphics/coretext/FontCoreText.cpp:
(WebCore::Font::supportsOpenTypeAlternateHalfWidths const):
(WebCore::supportsOpenTypeFeature):
(WebCore::Font::platformCreateHalfWidthFont const):
* Source/WebCore/platform/graphics/freetype/SimpleFontDataFreeType.cpp:
(WebCore::Font::platformCreateHalfWidthFont const):
* Source/WebCore/platform/graphics/skia/FontSkia.cpp:
(WebCore::Font::platformCreateHalfWidthFont const):
* Source/WebCore/platform/graphics/win/SimpleFontDataWin.cpp:
(WebCore::Font::platformCreateHalfWidthFont const):

Canonical link: https://commits.webkit.org/285219@main



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