Compile drott color demo w/o Chrome source

colr_demo_no_chrome.sh

# NOTE: prefer https://github.com/rsheeter/skia_colr/tree/colr_test, build_mac_colr.sh



git clone https://skia.googlesource.com/skia
cd skia
# download https://skia-review.googlesource.com/c/skia/+/300558

# What I actually did: click download, http, and take the Branch example, e.g:
# git fetch "https://skia.googlesource.com/skia" refs/changes/58/300558/2 && git checkout -b change-300558 FETCH_HEAD

# Probably better:
git cl patch 300558

# Now lets build it
./bin/fetch_gn
./tools/git-sync-deps

# Switch to Dominik's FT
cd third_party/externals/freetype
git remote add drott_ft_colr https://github.com/drott/freetype2-colr
git fetch drott_ft_colr
git checkout -b colr_v1 drott_ft_colr/colrV1API

# Back to root of Skia
cd ../../..

# Edit ./third_party/freetype2/include/freetype-android/ftmodule.h
# Not sure why this is necessary
# Comment out lcd renderer classes
//FT_USE_MODULE( FT_Renderer_Class, ft_smooth_lcd_renderer_class )
//FT_USE_MODULE( FT_Renderer_Class, ft_smooth_lcdv_renderer_class )


# Download https://chromium-review.googlesource.com/c/chromium/src/+/2282815/2/skia_test/skia_test.cc
# Place in tools/colr_test/

# Add a new entry to BUILD.gn, immediately after test_app("make_skqp_model")
  test_app("colr_test") {
    sources = [ 
      "tools/colr_test/skia_test.cc"
    ]
    deps = [ 
      ":skia",
      "//third_party/freetype2",
    ]
  }

# Args somewhat based on https://skia.org/dev/testing/fuzz
./bin/gn args out/Static
# Args
is_official_build = false
skia_use_fontconfig=false
skia_use_freetype=true
skia_use_system_freetype2=false
skia_enable_fontmgr_custom_directory=false
skia_enable_fontmgr_custom_embedded=false
skia_enable_fontmgr_custom_empty=true
# End Args

# gn args runs gen; only need this if you fiddled with BUILD.gn or something
./bin/gn gen out/Static

ninja -C out/Static

# Download https://chromium-review.googlesource.com/c/chromium/src/+/2282815/2/skia_test/samples-colr_1.ttf
# Place the ttf in skia_test/samples-colr_1.ttf (to match kTestFileName)

./out/Static/colr_test
# Should print a bunch of debug noise about gradients and stops
# You should now have a shiny new colr_v1_glyph.png file