Remove remaining refs to iftb and update the documentation.

Author: garretrieger

README.md

@@ -1,18 +1,39 @@
-# patch-subset-incxfer
-Code repository for the incremental transfer (incxfer) approach to Progressive Font Enrichment ([INCXFER](https://github.com/w3c/patch-subset-incxfer)).
-See also ([PFE](https://github.com/w3c/PFE)).
+# Incremental Font Transfer Encoder
+
+This code repository contains an implementation of an [incremental font transfer](https://w3c.github.io/IFT/Overview.html) encoder.
+
+Currently this implements a "low level" encoder where a specific segmentation plan  (how code points, features, and design space are
+split between patches) must be provided to generate the encoding. Eventually a higher level interface will be implemented which is
+capable of generating a segmentation plan.
+
+The encoder functionality can either be accessed programmatically via ift/encoder.h or via a command line tool.
+
+## Command Line
+
+The font2ift command line tool can be used to convert a non incremental font into an incremental font and collection of associated
+patches. Example usage:
+
+```sh
+bazel run util:font2ift  -- --input_font=$(pwd)/myfont.ttf --config=$(pwd)/segmentation_plan.txtpb --output_path=$(pwd)/ --output_font="myfont.ift.ttf"
+```
+
+Where segmentation_plan.textproto is a textproto file using the util/encoder_config.h schema. See the comments in that file for more details.
 
 ## Build
+
 This repository uses the bazel build system. You can build everything:
 
 ```sh
 bazel build ...
 ```
 
 and run all of the tests:
+
 ```sh
 bazel test ...
 ```
 
 ## Code Style
-The code follows the [Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html). Formatting is enforced by an automated check for new commits to this repo. You can auto-correct formatting for all files using the format.sh script.
+
+The code follows the [Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html). Formatting is enforced by an automated check for new
+commits to this repo. You can auto-correct formatting for all files using the format.sh script.

docs/static-ift.md

@@ -54,11 +54,7 @@ class IFTTable {
 
  private:
   /*
-   * Adds an encoded 'IFT ' table built from the supplied proto to font pointed
-   * to by face. By default this will maintain the physical ordering of tables
-   * already present in the font. If iftb_conversion is set any "IFTB" tables
-   * if present will be be removed and tables in the final font will be ordered
-   * according to IFTB ordering requirements.
+   * Adds an the provided 'IFT ' (and optionally an 'IFTX') tables to by face.
    */
   static absl::StatusOr<common::FontData> AddToFont(
       hb_face_t* face, absl::string_view ift_table,

ift/proto/ift_table.h

@@ -37,7 +37,7 @@ namespace ift::proto {
 class IFTTableTest : public ::testing::Test {
  protected:
   IFTTableTest()
-      : roboto_ab(make_hb_face(nullptr)), iftb(make_hb_face(nullptr)) {
+      : roboto_ab(make_hb_face(nullptr)) {
     sample.SetUrlTemplate("fonts/go/here");
     sample.SetId({1, 2, 3, 4});
     sample.GetPatchMap().AddEntry({30, 32}, 1, TABLE_KEYED_PARTIAL);
@@ -61,23 +61,9 @@ class IFTTableTest : public ::testing::Test {
     hb_blob_unique_ptr blob = make_hb_blob(
         hb_blob_create_from_file("common/testdata/Roboto-Regular.ab.ttf"));
     roboto_ab = make_hb_face(hb_face_create(blob.get(), 0));
-
-    blob = make_hb_blob(
-        hb_blob_create_from_file("ift/testdata/NotoSansJP-Regular.iftb.ttf"));
-    FontData font_data(std::move(blob));
-
-    std::string copy = font_data.string();
-    copy[0] = 'O';
-    copy[1] = 'T';
-    copy[2] = 'T';
-    copy[3] = 'O';
-
-    font_data.copy(copy);
-    iftb = font_data.face();
   }
 
   hb_face_unique_ptr roboto_ab;
-  hb_face_unique_ptr iftb;
   IFTTable empty;
   IFTTable sample;
   IFTTable sample_with_extensions;