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skia2/site/dev/testing/fonts.md
Mike Klein ea3f014e2b sk_tool_utils -> ToolUtils, and git clang-format 
sk_tool_utils doesn't really fit the naming convention
the rest of code under tools/ tends to use.

Change-Id: I45326a174101c6eb4b6149e9c742f658f2fd23b1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/202313
Auto-Submit: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2019-03-20 18:05:42 +00:00

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Fonts and GM Tests

Overview

Each test in the gm directory draws a reference image. Their primary purpose is to detect when images change unexpectedly, indicating that a rendering bug has been introduced.

The gm tests have a secondary purpose: they detect when rendering is different across platforms and configurations.

GM font selection

Each gm specifies the typeface to use when drawing text. For now, to set the portable typeface on the paint, call:

ToolUtils::set_portable_typeface(SkPaint* , const char* name = nullptr,
SkFontStyle style = SkFontStyle());

To create a portable typeface, use:

SkTypeface* typeface = ToolUtils::create_portable_typeface(const char* name,
SkFontStyle style);

Eventually, both set_portable_typeface() and create_portable_typeface() will be removed. Instead, a test-wide SkFontMgr will be selected to choose portable fonts or resource fonts.