[Impeller] libImpeller: Implement APIs for fetching glyph and line metrics.

engine/src/flutter/ci/licenses_golden/licenses_flutter

@@ -51783,13 +51783,17 @@ ORIGIN: ../../../flutter/impeller/toolkit/interop/example_mtl.m + ../../../flutt
 ORIGIN: ../../../flutter/impeller/toolkit/interop/example_vk.c + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/formats.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/formats.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/glyph_info.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/glyph_info.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/image_filter.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/image_filter.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/impeller.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/impeller.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/impeller.hpp + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/impeller_c.c + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/impeller_cc.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/line_metrics.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/line_metrics.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/mask_filter.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/mask_filter.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/object.cc + ../../../flutter/LICENSE
@@ -54764,13 +54768,17 @@ FILE: ../../../flutter/impeller/toolkit/interop/example_mtl.m
 FILE: ../../../flutter/impeller/toolkit/interop/example_vk.c
 FILE: ../../../flutter/impeller/toolkit/interop/formats.cc
 FILE: ../../../flutter/impeller/toolkit/interop/formats.h
+FILE: ../../../flutter/impeller/toolkit/interop/glyph_info.cc
+FILE: ../../../flutter/impeller/toolkit/interop/glyph_info.h
 FILE: ../../../flutter/impeller/toolkit/interop/image_filter.cc
 FILE: ../../../flutter/impeller/toolkit/interop/image_filter.h
 FILE: ../../../flutter/impeller/toolkit/interop/impeller.cc
 FILE: ../../../flutter/impeller/toolkit/interop/impeller.h
 FILE: ../../../flutter/impeller/toolkit/interop/impeller.hpp
 FILE: ../../../flutter/impeller/toolkit/interop/impeller_c.c
 FILE: ../../../flutter/impeller/toolkit/interop/impeller_cc.cc
+FILE: ../../../flutter/impeller/toolkit/interop/line_metrics.cc
+FILE: ../../../flutter/impeller/toolkit/interop/line_metrics.h
 FILE: ../../../flutter/impeller/toolkit/interop/mask_filter.cc
 FILE: ../../../flutter/impeller/toolkit/interop/mask_filter.h
 FILE: ../../../flutter/impeller/toolkit/interop/object.cc

engine/src/flutter/impeller/toolkit/interop/BUILD.gn

@@ -41,8 +41,12 @@ impeller_component("interop_base") {
     "dl_builder.h",
     "formats.cc",
     "formats.h",
+    "glyph_info.cc",
+    "glyph_info.h",
     "image_filter.cc",
     "image_filter.h",
+    "line_metrics.cc",
+    "line_metrics.h",
     "mask_filter.cc",
     "mask_filter.h",
     "object.cc",

engine/src/flutter/impeller/toolkit/interop/glyph_info.cc

@@ -0,0 +1,42 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "impeller/toolkit/interop/glyph_info.h"
+
+namespace impeller::interop {
+
+GlyphInfo::~GlyphInfo() = default;
+
+size_t GlyphInfo::GetGraphemeClusterCodeUnitRangeBegin() const {
+  return info_.fGraphemeClusterTextRange.start;
+}
+
+size_t GlyphInfo::GetGraphemeClusterCodeUnitRangeEnd() const {
+  return info_.fGraphemeClusterTextRange.end;
+}
+
+ImpellerRect GlyphInfo::GetGraphemeClusterBounds() const {
+  return ImpellerRect{
+      info_.fGraphemeLayoutBounds.y(),
+      info_.fGraphemeLayoutBounds.x(),
+      info_.fGraphemeLayoutBounds.width(),
+      info_.fGraphemeLayoutBounds.height(),
+  };
+}
+
+bool GlyphInfo::IsEllipsis() const {
+  return info_.fIsEllipsis;
+}
+
+ImpellerTextDirection GlyphInfo::GetTextDirection() const {
+  switch (info_.fDirection) {
+    case skia::textlayout::TextDirection::kRtl:
+      return kImpellerTextDirectionRTL;
+    case skia::textlayout::TextDirection::kLtr:
+      return kImpellerTextDirectionLTR;
+  }
+  return kImpellerTextDirectionLTR;
+}
+
+}  // namespace impeller::interop

engine/src/flutter/impeller/toolkit/interop/glyph_info.h

@@ -0,0 +1,63 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_IMPELLER_TOOLKIT_INTEROP_GLYPH_INFO_H_
+#define FLUTTER_IMPELLER_TOOLKIT_INTEROP_GLYPH_INFO_H_
+
+#include "flutter/third_party/skia/modules/skparagraph/include/Paragraph.h"
+#include "impeller/toolkit/interop/impeller.h"
+#include "impeller/toolkit/interop/object.h"
+
+namespace impeller::interop {
+
+//------------------------------------------------------------------------------
+/// @brief      Internal C++ peer of ImpellerGlyphInfo. For detailed
+///             documentation, refer to the headerdocs in the public API in
+///             impeller.h.
+///
+class GlyphInfo final
+    : public Object<GlyphInfo,
+                    IMPELLER_INTERNAL_HANDLE_NAME(ImpellerGlyphInfo)> {
+ public:
+  explicit GlyphInfo(skia::textlayout::Paragraph::GlyphInfo info)
+      : info_(info) {}
+
+  ~GlyphInfo();
+
+  GlyphInfo(const GlyphInfo&) = delete;
+
+  GlyphInfo& operator=(const GlyphInfo&) = delete;
+
+  //----------------------------------------------------------------------------
+  /// @see      ImpellerGlyphInfoGetGraphemeClusterCodeUnitRangeBegin.
+  ///
+  size_t GetGraphemeClusterCodeUnitRangeBegin() const;
+
+  //----------------------------------------------------------------------------
+  /// @see      ImpellerGlyphInfoGetGraphemeClusterCodeUnitRangeEnd.
+  ///
+  size_t GetGraphemeClusterCodeUnitRangeEnd() const;
+
+  //----------------------------------------------------------------------------
+  /// @see      ImpellerGlyphInfoGetGraphemeClusterBounds.
+  ///
+  ImpellerRect GetGraphemeClusterBounds() const;
+
+  //----------------------------------------------------------------------------
+  /// @see      ImpellerGlyphInfoIsEllipsis.
+  ///
+  bool IsEllipsis() const;
+
+  //----------------------------------------------------------------------------
+  /// @see      ImpellerGlyphInfoGetTextDirection.
+  ///
+  ImpellerTextDirection GetTextDirection() const;
+
+ private:
+  const skia::textlayout::Paragraph::GlyphInfo info_;
+};
+
+}  // namespace impeller::interop
+
+#endif  // FLUTTER_IMPELLER_TOOLKIT_INTEROP_GLYPH_INFO_H_

engine/src/flutter/impeller/toolkit/interop/impeller.cc

@@ -17,7 +17,9 @@
 #include "impeller/toolkit/interop/context.h"
 #include "impeller/toolkit/interop/dl_builder.h"
 #include "impeller/toolkit/interop/formats.h"
+#include "impeller/toolkit/interop/glyph_info.h"
 #include "impeller/toolkit/interop/image_filter.h"
+#include "impeller/toolkit/interop/line_metrics.h"
 #include "impeller/toolkit/interop/mask_filter.h"
 #include "impeller/toolkit/interop/object.h"
 #include "impeller/toolkit/interop/paint.h"
@@ -58,7 +60,9 @@ DEFINE_PEER_GETTER(ColorSource, ImpellerColorSource);
 DEFINE_PEER_GETTER(Context, ImpellerContext);
 DEFINE_PEER_GETTER(DisplayList, ImpellerDisplayList);
 DEFINE_PEER_GETTER(DisplayListBuilder, ImpellerDisplayListBuilder);
+DEFINE_PEER_GETTER(GlyphInfo, ImpellerGlyphInfo);
 DEFINE_PEER_GETTER(ImageFilter, ImpellerImageFilter);
+DEFINE_PEER_GETTER(LineMetrics, ImpellerLineMetrics);
 DEFINE_PEER_GETTER(MaskFilter, ImpellerMaskFilter);
 DEFINE_PEER_GETTER(Paint, ImpellerPaint);
 DEFINE_PEER_GETTER(Paragraph, ImpellerParagraph);
@@ -1272,6 +1276,12 @@ uint32_t ImpellerParagraphGetLineCount(ImpellerParagraph paragraph) {
   return GetPeer(paragraph)->GetLineCount();
 }
 
+IMPELLER_EXTERN_C
+ImpellerRange ImpellerParagraphGetWordBoundary(ImpellerParagraph paragraph,
+                                               size_t code_unit_index) {
+  return GetPeer(paragraph)->GetWordBoundary(code_unit_index);
+}
+
 IMPELLER_EXTERN_C
 ImpellerTypographyContext ImpellerTypographyContextNew() {
   auto context = Create<TypographyContext>();
@@ -1309,4 +1319,154 @@ bool ImpellerTypographyContextRegisterFont(ImpellerTypographyContext context,
                                         family_name_alias);
 }
 
+IMPELLER_EXTERN_C
+ImpellerLineMetrics ImpellerParagraphGetLineMetrics(
+    ImpellerParagraph paragraph) {
+  return GetPeer(paragraph)->GetLineMetrics().GetC();
+}
+
+IMPELLER_EXTERN_C
+ImpellerGlyphInfo ImpellerParagraphCreateGlyphInfoAtCodeUnitIndexNew(
+    ImpellerParagraph paragraph,
+    size_t code_unit_index) {
+  return GetPeer(paragraph)
+      ->GetGlyphInfoAtCodeUnitIndex(code_unit_index)
+      .Leak();
+}
+
+IMPELLER_EXTERN_C
+ImpellerGlyphInfo ImpellerParagraphCreateGlyphInfoAtParagraphCoordinatesNew(
+    ImpellerParagraph paragraph,
+    double x,
+    double y) {
+  return GetPeer(paragraph)
+      ->GetClosestGlyphInfoAtParagraphCoordinates(x, y)
+      .Leak();
+}
+
+//------------------------------------------------------------------------------
+// Line Metrics
+//------------------------------------------------------------------------------
+
+IMPELLER_EXTERN_C
+void ImpellerLineMetricsRetain(ImpellerLineMetrics line_metrics) {
+  ObjectBase::SafeRetain(line_metrics);
+}
+
+IMPELLER_EXTERN_C
+void ImpellerLineMetricsRelease(ImpellerLineMetrics line_metrics) {
+  ObjectBase::SafeRelease(line_metrics);
+}
+
+IMPELLER_EXTERN_C
+double ImpellerLineMetricsGetUnscaledAscent(ImpellerLineMetrics metrics,
+                                            size_t line) {
+  return GetPeer(metrics)->GetUnscaledAscent(line);
+}
+
+IMPELLER_EXTERN_C
+double ImpellerLineMetricsGetAscent(ImpellerLineMetrics metrics, size_t line) {
+  return GetPeer(metrics)->GetAscent(line);
+}
+
+IMPELLER_EXTERN_C
+double ImpellerLineMetricsGetDescent(ImpellerLineMetrics metrics, size_t line) {
+  return GetPeer(metrics)->GetDescent(line);
+}
+
+IMPELLER_EXTERN_C
+double ImpellerLineMetricsGetBaseline(ImpellerLineMetrics metrics,
+                                      size_t line) {
+  return GetPeer(metrics)->GetBaseline(line);
+}
+
+IMPELLER_EXTERN_C
+bool ImpellerLineMetricsIsHardbreak(ImpellerLineMetrics metrics, size_t line) {
+  return GetPeer(metrics)->IsHardbreak(line);
+}
+
+IMPELLER_EXTERN_C
+double ImpellerLineMetricsGetWidth(ImpellerLineMetrics metrics, size_t line) {
+  return GetPeer(metrics)->GetWidth(line);
+}
+
+IMPELLER_EXTERN_C
+double ImpellerLineMetricsGetHeight(ImpellerLineMetrics metrics, size_t line) {
+  return GetPeer(metrics)->GetHeight(line);
+}
+
+IMPELLER_EXTERN_C
+double ImpellerLineMetricsGetLeft(ImpellerLineMetrics metrics, size_t line) {
+  return GetPeer(metrics)->GetLeft(line);
+}
+
+IMPELLER_EXTERN_C
+size_t ImpellerLineMetricsGetCodeUnitStartIndex(ImpellerLineMetrics metrics,
+                                                size_t line) {
+  return GetPeer(metrics)->GetCodeUnitStartIndex(line);
+}
+
+IMPELLER_EXTERN_C
+size_t ImpellerLineMetricsGetCodeUnitEndIndex(ImpellerLineMetrics metrics,
+                                              size_t line) {
+  return GetPeer(metrics)->GetCodeUnitEndIndex(line);
+}
+
+IMPELLER_EXTERN_C
+size_t ImpellerLineMetricsGetCodeUnitEndIndexExcludingWhitespace(
+    ImpellerLineMetrics metrics,
+    size_t line) {
+  return GetPeer(metrics)->GetCodeUnitEndIndexExcludingWhitespace(line);
+}
+
+IMPELLER_EXTERN_C
+size_t ImpellerLineMetricsGetCodeUnitEndIndexIncludingNewline(
+    ImpellerLineMetrics metrics,
+    size_t line) {
+  return GetPeer(metrics)->GetCodeUnitEndIndexIncludingNewline(line);
+}
+
+//------------------------------------------------------------------------------
+// Glyph Info
+//------------------------------------------------------------------------------
+
+IMPELLER_EXTERN_C
+void ImpellerGlyphInfoRetain(ImpellerGlyphInfo glyph_info) {
+  ObjectBase::SafeRetain(glyph_info);
+}
+
+IMPELLER_EXTERN_C
+void ImpellerGlyphInfoRelease(ImpellerGlyphInfo glyph_info) {
+  ObjectBase::SafeRelease(glyph_info);
+}
+
+IMPELLER_EXTERN_C
+size_t ImpellerGlyphInfoGetGraphemeClusterCodeUnitRangeBegin(
+    ImpellerGlyphInfo glyph_info) {
+  return GetPeer(glyph_info)->GetGraphemeClusterCodeUnitRangeBegin();
+}
+
+IMPELLER_EXTERN_C
+size_t ImpellerGlyphInfoGetGraphemeClusterCodeUnitRangeEnd(
+    ImpellerGlyphInfo glyph_info) {
+  return GetPeer(glyph_info)->GetGraphemeClusterCodeUnitRangeEnd();
+}
+
+IMPELLER_EXTERN_C
+ImpellerRect ImpellerGlyphInfoGetGraphemeClusterBounds(
+    ImpellerGlyphInfo glyph_info) {
+  return GetPeer(glyph_info)->GetGraphemeClusterBounds();
+}
+
+IMPELLER_EXTERN_C
+bool ImpellerGlyphInfoIsEllipsis(ImpellerGlyphInfo glyph_info) {
+  return GetPeer(glyph_info)->IsEllipsis();
+}
+
+IMPELLER_EXTERN_C
+ImpellerTextDirection ImpellerGlyphInfoGetTextDirection(
+    ImpellerGlyphInfo glyph_info) {
+  return GetPeer(glyph_info)->GetTextDirection();
+}
+
 }  // namespace impeller::interop