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Allow specifying multiple fonts or font families for local font rendering #16253

Merged
merged 11 commits into from
Apr 24, 2020
Merged

Allow specifying multiple fonts or font families for local font rendering #16253

merged 11 commits into from
Apr 24, 2020

Commits on Apr 24, 2020

  1. [ios, macos] Corrected PingFang test fixture 

    PingFangTC-Regular is better than PingFangTC-Thin. There is no font by the name “PingFang”.
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    1ec5 committed Apr 24, 2020
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  2. [ios, macos] Allow specifying multiple fonts or font families for loc… 

    …al font rendering

mbgl::Renderer and mbgl::MapSnapshotter can now contain a list of font family names, font display names, and font PostScript names, each name separated by a newline.
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    1ec5 committed Apr 24, 2020
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  3. [ios, macos] Take font family names from user defaults 

    Take font family names from user defaults before falling back to font family names in Info.plist.
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    1ec5 committed Apr 24, 2020
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  4. [core] Factored out default fonts

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    1ec5 committed Apr 24, 2020
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  5. [ios, macos] Choose fonts from font stack that match local fonts 

    Prefer local fonts that match the names specified in the font stack (from the text-font layout property), except for the last resort fonts that mbgl hard-codes. Fall back to the list of fallback CJK fonts in user defaults, then the fonts passed in through the platform-agnostic interface (that come from Info.plist). Explicitly use the first font descriptor in the cascade list instead of the system default of Helvetica.

Since the font stack can vary from one rasterization operation to the next, avoid caching the resolved font for now. Removed null checks that are unrealistic given the Core Text API contract.
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  6. [ios, macos] Avoid redundant fallback in font cascade list 

    A font descriptor should not be a fallback for itself.
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    1ec5 committed Apr 24, 2020
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  7. [ios, macos] Get glyph metrics from font 

    Get glyph metrics from the font in the process of drawing each glyph into a bitmap context. These metrics result in more accurate kerning and better aligned baselines than the previous hard-coded values.

Align iOS/macOS local glyph rasterization test fixture to Qt.
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  8. [ios, macos] Added and updated documentation

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    1ec5 committed Apr 24, 2020
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  9. [ios, macos] Match only one font name attribute at a time

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    1ec5 committed Apr 24, 2020
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  10. [ios, macos] Increased tolerance for local glyph rasterization test 

    Co-authored-by: Alexander Shalamov <alexander.shalamov@mapbox.com>
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    1ec5 and alexshalamov committed Apr 24, 2020
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  11. Add test for PingFang TC Semibold

    @alexshalamov @1ec5
    alexshalamov authored and 1ec5 committed Apr 24, 2020
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