blob: ed965cf2eccb3290650bae69a65bf52698529304 [file] [log] [blame]
* Copyright 2023 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkTypeface_Fontations_priv_DEFINED
#define SkTypeface_Fontations_priv_DEFINED
#include "include/core/SkFontParameters.h"
#include "include/core/SkPath.h"
#include "include/core/SkStream.h"
#include "include/core/SkTypeface.h"
#include "include/private/base/SkOnce.h"
#include "src/core/SkAdvancedTypefaceMetrics.h"
#include "src/core/SkScalerContext.h"
#include "src/ports/fontations/src/"
#include <memory>
class SkStreamAsset;
namespace sk_fontations {
/** Implementation of PathWrapper FFI C++ interface which allows Rust to call back
* into C++ without exposing Skia types on the interface, see skpath_bridge.h. */
class PathGeometrySink : public fontations_ffi::PathWrapper {
/* From fontations_ffi::PathWrapper. */
void move_to(float x, float y) override;
void line_to(float x, float y) override;
void quad_to(float cx0, float cy0, float x, float y) override;
void curve_to(float cx0, float cy0, float cx1, float cy1, float x, float y) override;
void close() override;
SkPath into_inner() &&;
void going_to(SkPoint point);
bool current_is_not(SkPoint);
SkPath fPath;
bool fStarted;
SkPoint fCurrent;
/** Implementation of AxisWrapper FFI C++ interface, allowing Rust to call back into
* C++ for populating variable axis availability information, see skpath_bridge.h. */
class AxisWrapper : public fontations_ffi::AxisWrapper {
AxisWrapper(SkFontParameters::Variation::Axis axisArray[], size_t axisCount);
AxisWrapper() = delete;
/* From fontations_ffi::AxisWrapper. */
bool populate_axis(
size_t i, uint32_t axisTag, float min, float def, float max, bool hidden) override;
size_t size() const override;
SkFontParameters::Variation::Axis* fAxisArray;
size_t fAxisCount;
} // namespace sk_fontations
/** SkTypeface implementation based on Google Fonts Fontations Rust libraries. */
class SkTypeface_Fontations : public SkTypeface {
SkTypeface_Fontations(sk_sp<SkData> fontData, const SkFontArguments&);
bool hasValidBridgeFontRef() const;
const fontations_ffi::BridgeFontRef& getBridgeFontRef() { return *fBridgeFontRef; }
const fontations_ffi::BridgeNormalizedCoords& getBridgeNormalizedCoords() {
return *fBridgeNormalizedCoords;
static constexpr SkTypeface::FactoryId FactoryId = SkSetFourByteTag('f', 'n', 't', 'a');
static sk_sp<SkTypeface> MakeFromData(sk_sp<SkData> fontData, const SkFontArguments&);
static sk_sp<SkTypeface> MakeFromStream(std::unique_ptr<SkStreamAsset>, const SkFontArguments&);
std::unique_ptr<SkStreamAsset> onOpenStream(int* ttcIndex) const override;
sk_sp<SkTypeface> onMakeClone(const SkFontArguments& args) const override;
std::unique_ptr<SkScalerContext> onCreateScalerContext(const SkScalerContextEffects& effects,
const SkDescriptor* desc) const override;
void onFilterRec(SkScalerContextRec*) const override;
std::unique_ptr<SkAdvancedTypefaceMetrics> onGetAdvancedMetrics() const override {
return nullptr;
void onGetFontDescriptor(SkFontDescriptor*, bool*) const override;
void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override;
int onCountGlyphs() const override;
void getPostScriptGlyphNames(SkString*) const override {}
void getGlyphToUnicodeMap(SkUnichar*) const override {}
int onGetUPEM() const override;
void onGetFamilyName(SkString* familyName) const override;
bool onGetPostScriptName(SkString*) const override;
SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override;
bool onGlyphMaskNeedsCurrentColor() const override;
int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[],
int coordinateCount) const override;
int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[],
int parameterCount) const override;
int onGetTableTags(SkFontTableTag tags[]) const override;
size_t onGetTableData(SkFontTableTag, size_t, size_t, void*) const override;
sk_sp<SkData> fFontData;
// Incoming ttc index requested when this typeface was instantiated from data.
uint32_t fTtcIndex = 0;
// fBridgeFontRef accesses the data in fFontData. fFontData needs to be kept around for the
// lifetime of fBridgeFontRef to safely request parsed data.
rust::Box<fontations_ffi::BridgeFontRef> fBridgeFontRef;
rust::Box<fontations_ffi::BridgeNormalizedCoords> fBridgeNormalizedCoords;
mutable SkOnce fGlyphMasksMayNeedCurrentColorOnce;
mutable bool fGlyphMasksMayNeedCurrentColor;
#endif // SkTypeface_Fontations_DEFINED