[Impeller] A text layout and shaping API for the standalone library.

ci/licenses_golden/licenses_flutter

@@ -43298,6 +43298,12 @@ ORIGIN: ../../../flutter/impeller/toolkit/interop/object.cc + ../../../flutter/L
 ORIGIN: ../../../flutter/impeller/toolkit/interop/object.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/paint.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/paint.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/paragraph.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/paragraph.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/paragraph_builder.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/paragraph_builder.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/paragraph_style.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/paragraph_style.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/path.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/path.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/path_builder.cc + ../../../flutter/LICENSE
@@ -43308,6 +43314,8 @@ ORIGIN: ../../../flutter/impeller/toolkit/interop/surface.cc + ../../../flutter/
 ORIGIN: ../../../flutter/impeller/toolkit/interop/surface.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/texture.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/toolkit/interop/texture.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/typography_context.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/toolkit/interop/typography_context.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/typographer/backends/skia/text_frame_skia.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/typographer/backends/skia/text_frame_skia.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/typographer/backends/skia/typeface_skia.cc + ../../../flutter/LICENSE
@@ -46168,6 +46176,12 @@ FILE: ../../../flutter/impeller/toolkit/interop/object.cc
 FILE: ../../../flutter/impeller/toolkit/interop/object.h
 FILE: ../../../flutter/impeller/toolkit/interop/paint.cc
 FILE: ../../../flutter/impeller/toolkit/interop/paint.h
+FILE: ../../../flutter/impeller/toolkit/interop/paragraph.cc
+FILE: ../../../flutter/impeller/toolkit/interop/paragraph.h
+FILE: ../../../flutter/impeller/toolkit/interop/paragraph_builder.cc
+FILE: ../../../flutter/impeller/toolkit/interop/paragraph_builder.h
+FILE: ../../../flutter/impeller/toolkit/interop/paragraph_style.cc
+FILE: ../../../flutter/impeller/toolkit/interop/paragraph_style.h
 FILE: ../../../flutter/impeller/toolkit/interop/path.cc
 FILE: ../../../flutter/impeller/toolkit/interop/path.h
 FILE: ../../../flutter/impeller/toolkit/interop/path_builder.cc
@@ -46178,6 +46192,8 @@ FILE: ../../../flutter/impeller/toolkit/interop/surface.cc
 FILE: ../../../flutter/impeller/toolkit/interop/surface.h
 FILE: ../../../flutter/impeller/toolkit/interop/texture.cc
 FILE: ../../../flutter/impeller/toolkit/interop/texture.h
+FILE: ../../../flutter/impeller/toolkit/interop/typography_context.cc
+FILE: ../../../flutter/impeller/toolkit/interop/typography_context.h
 FILE: ../../../flutter/impeller/tools/malioc.json
 FILE: ../../../flutter/impeller/typographer/backends/skia/text_frame_skia.cc
 FILE: ../../../flutter/impeller/typographer/backends/skia/text_frame_skia.h

impeller/toolkit/interop/BUILD.gn

@@ -4,6 +4,14 @@
 
 import("//flutter/impeller/tools/impeller.gni")
 
+embed_blob("embedded_icu_data") {
+  symbol_name = "embedded_icu_data"
+  blob = "//flutter/third_party/icu/flutter/icudtl.dat"
+  hdr = "$target_gen_dir/embedded_icu_data.h"
+  cc = "$target_gen_dir/embedded_icu_data.cc"
+  deps = []
+}
+
 impeller_component("interop") {
   sources = [
     "color_filter.cc",
@@ -29,6 +37,12 @@ impeller_component("interop") {
     "object.h",
     "paint.cc",
     "paint.h",
+    "paragraph.cc",
+    "paragraph.h",
+    "paragraph_builder.cc",
+    "paragraph_builder.h",
+    "paragraph_style.cc",
+    "paragraph_style.h",
     "path.cc",
     "path.h",
     "path_builder.cc",
@@ -37,16 +51,21 @@ impeller_component("interop") {
     "surface.h",
     "texture.cc",
     "texture.h",
+    "typography_context.cc",
+    "typography_context.h",
   ]
 
-  deps = [
+  public_deps = [
     "../../base",
     "../../display_list",
     "../../entity",
     "../../renderer/backend",
     "//flutter/display_list",
     "//flutter/fml",
+    "//flutter/third_party/txt",
   ]
+
+  deps = [ ":embedded_icu_data" ]
 }
 
 impeller_component("library") {

impeller/toolkit/interop/dl_builder.cc

@@ -176,4 +176,13 @@ void DisplayListBuilder::DrawTextureRect(const Texture& texture,
   );
 }
 
+void DisplayListBuilder::DrawParagraph(const Paragraph& paragraph,
+                                       Point point) {
+  const auto& handle = paragraph.GetHandle();
+  if (!handle) {
+    return;
+  }
+  handle->Paint(&builder_, point.x, point.y);
+}
+
 }  // namespace impeller::interop

impeller/toolkit/interop/dl_builder.h

@@ -15,6 +15,7 @@
 #include "impeller/toolkit/interop/impeller.h"
 #include "impeller/toolkit/interop/object.h"
 #include "impeller/toolkit/interop/paint.h"
+#include "impeller/toolkit/interop/paragraph.h"
 #include "impeller/toolkit/interop/path.h"
 #include "impeller/toolkit/interop/texture.h"
 
@@ -106,6 +107,8 @@ class DisplayListBuilder final
 
   void DrawDisplayList(const DisplayList& dl, Scalar opacity);
 
+  void DrawParagraph(const Paragraph& paragraph, Point point);
+
   ScopedObject<DisplayList> Build();
 
  private:

impeller/toolkit/interop/formats.h

@@ -9,6 +9,9 @@
 
 #include "flutter/display_list/dl_builder.h"
 #include "flutter/display_list/dl_color.h"
+#include "flutter/third_party/txt/src/txt/font_style.h"
+#include "flutter/third_party/txt/src/txt/font_weight.h"
+#include "flutter/third_party/txt/src/txt/paragraph_style.h"
 #include "impeller/entity/entity.h"
 #include "impeller/geometry/color.h"
 #include "impeller/geometry/matrix.h"
@@ -418,6 +421,68 @@ constexpr flutter::DlColor ToDisplayListType(ImpellerColor color) {
   );
 }
 
+constexpr txt::FontWeight ToTxtType(ImpellerFontWeight weight) {
+  switch (weight) {
+    case kImpellerFontWeight100:
+      return txt::FontWeight::w100;
+    case kImpellerFontWeight200:
+      return txt::FontWeight::w200;
+    case kImpellerFontWeight300:
+      return txt::FontWeight::w300;
+    case kImpellerFontWeight400:
+      return txt::FontWeight::w400;
+    case kImpellerFontWeight500:
+      return txt::FontWeight::w500;
+    case kImpellerFontWeight600:
+      return txt::FontWeight::w600;
+    case kImpellerFontWeight700:
+      return txt::FontWeight::w700;
+    case kImpellerFontWeight800:
+      return txt::FontWeight::w800;
+    case kImpellerFontWeight900:
+      return txt::FontWeight::w900;
+  }
+  return txt::FontWeight::w400;
+}
+
+constexpr txt::FontStyle ToTxtType(ImpellerFontStyle style) {
+  switch (style) {
+    case kImpellerFontStyleNormal:
+      return txt::FontStyle::normal;
+    case kImpellerFontStyleItalic:
+      return txt::FontStyle::italic;
+  }
+  return txt::FontStyle::normal;
+}
+
+constexpr txt::TextAlign ToTxtType(ImpellerTextAlignment align) {
+  switch (align) {
+    case kImpellerTextAlignmentLeft:
+      return txt::TextAlign::left;
+    case kImpellerTextAlignmentRight:
+      return txt::TextAlign::right;
+    case kImpellerTextAlignmentCenter:
+      return txt::TextAlign::center;
+    case kImpellerTextAlignmentJustify:
+      return txt::TextAlign::justify;
+    case kImpellerTextAlignmentStart:
+      return txt::TextAlign::start;
+    case kImpellerTextAlignmentEnd:
+      return txt::TextAlign::end;
+  }
+  return txt::TextAlign::left;
+}
+
+constexpr txt::TextDirection ToTxtType(ImpellerTextDirection direction) {
+  switch (direction) {
+    case kImpellerTextDirectionRTL:
+      return txt::TextDirection::rtl;
+    case kImpellerTextDirectionLTR:
+      return txt::TextDirection::ltr;
+  }
+  return txt::TextDirection::ltr;
+}
+
 }  // namespace impeller::interop
 
 #endif  // FLUTTER_IMPELLER_TOOLKIT_INTEROP_FORMATS_H_