diff options
Diffstat (limited to 'skia-harfbuzz-3.0.0.patch')
| -rw-r--r-- | skia-harfbuzz-3.0.0.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/skia-harfbuzz-3.0.0.patch b/skia-harfbuzz-3.0.0.patch new file mode 100644 index 000000000000..859cc90215cf --- /dev/null +++ b/skia-harfbuzz-3.0.0.patch @@ -0,0 +1,100 @@ +# Minimal diff for harfbuzz 3.0.0 support; based on: +# https://github.com/google/skia/commit/66684b17b382 +# https://github.com/google/skia/commit/51d83abcd24a + +diff --git a/gn/skia.gni b/gn/skia.gni +index d98fdc19ee..199335d5c4 100644 +--- a/gn/skia.gni ++++ b/gn/skia.gni +@@ -34,8 +34,6 @@ declare_args() { + skia_include_multiframe_procs = false + skia_lex = false + skia_libgifcodec_path = "third_party/externals/libgifcodec" +- skia_pdf_subset_harfbuzz = +- false # TODO: set skia_pdf_subset_harfbuzz to skia_use_harfbuzz. + skia_qt_path = getenv("QT_PATH") + skia_skqp_global_error_tolerance = 0 + skia_tools_require_resources = false +@@ -99,6 +97,10 @@ declare_args() { + skia_use_libfuzzer_defaults = true + } + ++declare_args() { ++ skia_pdf_subset_harfbuzz = skia_use_harfbuzz ++} ++ + declare_args() { + skia_compile_sksl_tests = skia_compile_processors + skia_enable_fontmgr_android = skia_use_expat && skia_use_freetype +diff --git a/src/pdf/SkPDFSubsetFont.cpp b/src/pdf/SkPDFSubsetFont.cpp +index 81c37eef3a..2340a7937b 100644 +--- a/src/pdf/SkPDFSubsetFont.cpp ++++ b/src/pdf/SkPDFSubsetFont.cpp +@@ -49,6 +49,37 @@ static sk_sp<SkData> to_data(HBBlob blob) { + blob.release()); + } + ++template<typename...> using void_t = void; ++template<typename T, typename = void> ++struct SkPDFHarfBuzzSubset { ++ // This is the HarfBuzz 3.0 interface. ++ // hb_subset_flags_t does not exist in 2.0. It isn't dependent on T, so inline the value of ++ // HB_SUBSET_FLAGS_RETAIN_GIDS until 2.0 is no longer supported. ++ static HBFace Make(T input, hb_face_t* face) { ++ // TODO: When possible, check if a font is 'tricky' with FT_IS_TRICKY. ++ // If it isn't known if a font is 'tricky', retain the hints. ++ hb_subset_input_set_flags(input, 2/*HB_SUBSET_FLAGS_RETAIN_GIDS*/); ++ return HBFace(hb_subset_or_fail(face, input)); ++ } ++}; ++template<typename T> ++struct SkPDFHarfBuzzSubset<T, void_t< ++ decltype(hb_subset_input_set_retain_gids(std::declval<T>(), std::declval<bool>())), ++ decltype(hb_subset_input_set_drop_hints(std::declval<T>(), std::declval<bool>())), ++ decltype(hb_subset(std::declval<hb_face_t*>(), std::declval<T>())) ++ >> ++{ ++ // This is the HarfBuzz 2.0 (non-public) interface, used if it exists. ++ // This code should be removed as soon as all users are migrated to the newer API. ++ static HBFace Make(T input, hb_face_t* face) { ++ hb_subset_input_set_retain_gids(input, true); ++ // TODO: When possible, check if a font is 'tricky' with FT_IS_TRICKY. ++ // If it isn't known if a font is 'tricky', retain the hints. ++ hb_subset_input_set_drop_hints(input, false); ++ return HBFace(hb_subset(face, input)); ++ } ++}; ++ + static sk_sp<SkData> subset_harfbuzz(sk_sp<SkData> fontData, + const SkPDFGlyphUse& glyphUsage, + int ttcIndex) { +@@ -71,11 +102,10 @@ static sk_sp<SkData> subset_harfbuzz(sk_sp<SkData> fontData, + hb_set_t* glyphs = hb_subset_input_glyph_set(input.get()); + glyphUsage.getSetValues([&glyphs](unsigned gid) { hb_set_add(glyphs, gid);}); + +- hb_subset_input_set_retain_gids(input.get(), true); +- // TODO: When possible, check if a font is 'tricky' with FT_IS_TRICKY. +- // If it isn't known if a font is 'tricky', retain the hints. +- hb_subset_input_set_drop_hints(input.get(), false); +- HBFace subset(hb_subset(face.get(), input.get())); ++ HBFace subset = SkPDFHarfBuzzSubset<hb_subset_input_t*>::Make(input.get(), face.get()); ++ if (!subset) { ++ return nullptr; ++ } + HBBlob result(hb_face_reference_blob(subset.get())); + return to_data(std::move(result)); + } +diff --git a/third_party/harfbuzz/BUILD.gn b/third_party/harfbuzz/BUILD.gn +index 173830de62..4156607ef9 100644 +--- a/third_party/harfbuzz/BUILD.gn ++++ b/third_party/harfbuzz/BUILD.gn +@@ -14,6 +14,9 @@ if (skia_use_system_harfbuzz) { + "harfbuzz", + "harfbuzz-icu", + ] ++ if (skia_pdf_subset_harfbuzz) { ++ libs += [ "harfbuzz-subset" ] ++ } + } + } else { + third_party("harfbuzz") { |