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Bug 1819272 - Implement ScaledFontDWrite::HasVariationSettings(), so that we can use the print-as-paths option for PDF output with variation fonts on Windows. r=gfx-reviewers,lsalzman

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Differential Revision: https://phabricator.services.mozilla.com/D171565
This commit is contained in:
Jonathan Kew 2023-03-03 14:06:07 +00:00
parent e275ea917f
commit a885dbf9a2
2 changed files with 42 additions and 0 deletions
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40
gfx/2d/ScaledFontDWrite.cpp
View File

@ -383,6 +383,46 @@ ScaledFontDWrite::InstanceData::InstanceData(
}
}
bool ScaledFontDWrite::HasVariationSettings() {
RefPtr<IDWriteFontFace5> ff5;
mFontFace->QueryInterface(__uuidof(IDWriteFontFace5),
(void**)getter_AddRefs(ff5));
if (!ff5 || !ff5->HasVariations()) {
return false;
}
uint32_t count = ff5->GetFontAxisValueCount();
if (!count) {
return false;
}
RefPtr<IDWriteFontResource> res;
if (FAILED(ff5->GetFontResource(getter_AddRefs(res)))) {
return false;
}
std::vector<DWRITE_FONT_AXIS_VALUE> defaults(count);
if (FAILED(res->GetDefaultFontAxisValues(defaults.data(), count))) {
return false;
}
std::vector<DWRITE_FONT_AXIS_VALUE> values(count);
if (FAILED(ff5->GetFontAxisValues(values.data(), count))) {
return false;
}
for (uint32_t i = 0; i < count; i++) {
DWRITE_FONT_AXIS_ATTRIBUTES attr = res->GetFontAxisAttributes(i);
if (attr & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) {
if (values[i].value != defaults[i].value) {
return true;
}
}
}
return false;
}
// Helper for ScaledFontDWrite::GetFontInstanceData: if the font has variation
// axes, get their current values into the aOutput vector.
static void GetVariationsFromFontFace(IDWriteFontFace* aFace,

2
gfx/2d/ScaledFontDWrite.h
View File

@ -63,6 +63,8 @@ class ScaledFontDWrite final : public ScaledFontBase {
return (mFontFace->GetSimulations() & DWRITE_FONT_SIMULATIONS_BOLD) != 0;
}
bool HasVariationSettings() override;
SkTypeface* CreateSkTypeface() override;
void SetupSkFontDrawOptions(SkFont& aFont) override;
SkFontStyle mStyle;