[Git][freetype/freetype-demos][master] 2 commits: [ftinspect] Fix named

Charlie Jiang pushed to branch master at FreeType / FreeType Demo Programs

Commits:

f563855d

by Charlie Jiang at 2023-08-06T09:37:06+00:00

[ftinspect] Fix named instances switching.

* src/ftinspect/engine/mmgx.cpp, src/ftinspect/engine/mmgx.hpp:
  Load the default values of MMGX axes from the named instance instead of
  the global default one.

* src/ftinspect/engine/engine.cpp, src/ftinspect/engine/engine.hpp:
  Switch the named instance using `FT_Set_Named_Instance` when loading
  fonts.

399eb8cf

by Charlie Jiang at 2023-08-06T09:37:06+00:00

[ftinspect] Fix default named instance handling.

Now the named instance selector no longer doubles the default named instance.
`FT_Get_Default_Named_Instance` is used to get the default NI index.
The default one is labeled as " (default)".

* src/ftinspect/widgets/tripletselector.cpp: Properly handle the new 1-based
  named instance indices. Label the default NI correctly.

* src/ftinspect/engine/engine.cpp, src/ftinspect/engine/engine.hpp:
  Add `Engine::defualtNamedInstanceIndex`.

* src/ftinspect/engine/mmgx.cpp: Change comments.

5 changed files:

src/ftinspect/engine/engine.cpp
src/ftinspect/engine/engine.hpp
src/ftinspect/engine/mmgx.cpp
src/ftinspect/engine/mmgx.hpp
src/ftinspect/widgets/tripletselector.cpp

Changes:

src/ftinspect/engine/engine.cpp

@@ -71,6 +71,7 @@ FaceID::operator<(const FaceID& other) const
  // font, face, and named instance indices.  Getting a key from a value is
  // slow, but this must be done only once, since `faceRequester` is only
  // called if the font is not yet in the cache.
 +// Note: Instance indices start from 1, and 0 is used to indicate no MM/GX handling.
  FT_Error
  faceRequester(FTC_FaceID ftcFaceID,
@@ -101,8 +102,7 @@ faceRequester(FTC_FaceID ftcFaceID,
    QString font = engine->fontFileManager_[faceID.fontIndex].filePath();
    long faceIndex = faceID.faceIndex;
 -  if (faceID.namedInstanceIndex > 0)
 -    faceIndex += faceID.namedInstanceIndex << 16;
 +  faceIndex += (faceID.namedInstanceIndex) << 16;
    *faceP = NULL;
    return FT_New_Face(library,
@@ -227,8 +227,8 @@ int
  Engine::numberOfNamedInstances(int fontIndex,
                                 long faceIndex)
+ {
 -  // We return `n` named instances plus one;
 -  // instance index 0 represents a face without a named instance selected.
 +  // With the new `FT_Get_Default_Named_Instance` func, we no longer to return
 +  // one more entries.
    int numNamedInstances = -1;
    if (fontIndex < 0)
      return -1;
@@ -237,7 +237,7 @@ Engine::numberOfNamedInstances(int fontIndex,
             [&](FT_Face face)
+            {
               numNamedInstances
 -               = static_cast<int>((face->style_flags >> 16) + 1);
 +               = static_cast<int>((face->style_flags >> 16));
             });
    return numNamedInstances;
@@ -264,6 +264,25 @@ Engine::namedInstanceName(int fontIndex,
+ }
 +unsigned
 +Engine::defaultNamedInstanceIndex(int fontIndex,
 +                                  int faceIndex)
 +{
 +  if (fontIndex < 0)
 +    return 0;
 +  unsigned ret = 0;
 +  withFace(FaceID(fontIndex, faceIndex, 0),
 +           [&](FT_Face face)
 +           {
 +             if (FT_Get_Default_Named_Instance(face, &ret) != 0)
 +             {
 +               // XXX error handling?
 +             }
 +           });
 +  return ret;
 +}
++
++
  bool
  Engine::currentFontTricky()
+ {
@@ -359,6 +378,8 @@ Engine::loadFont(int fontIndex,
      else
        fontType_ = FontType_Other;
 +    switchNamedInstance(namedInstanceIndex);
++
      curCharMaps_.clear();
      curCharMaps_.reserve(ftFallbackFace_->num_charmaps);
      for (int i = 0; i < ftFallbackFace_->num_charmaps; i++)
@@ -366,7 +387,8 @@ Engine::loadFont(int fontIndex,
      SFNTName::get(this, curSFNTNames_);
      loadPaletteInfos();
 -    curMMGXState_ = MMGXAxisInfo::get(this, curMMGXAxes_);
 +    curMMGXState_ = MMGXAxisInfo::get(
 +        this, static_cast<unsigned>(namedInstanceIndex), curMMGXAxes_);
+   }
    curNumGlyphs_ = numGlyphs;
@@ -1035,4 +1057,25 @@ Engine::loadPaletteInfos()
+ }
 +void
 +Engine::switchNamedInstance(int index)
 +{
 +  if (!ftFallbackFace_ || !FT_HAS_MULTIPLE_MASTERS(ftFallbackFace_))
 +    return;
 +  auto err = FT_Set_Named_Instance(ftFallbackFace_, index);
 +  if (err)
 +  {
 +    // XXX error handling
 +  }
 +  if (ftSize_)
 +  {
 +    err = FT_Set_Named_Instance(ftSize_->face, index);
 +    if (err)
 +    {
 +      // XXX error handling
 +    }
 +  }
 +}
++
++
  // end of engine.cpp

src/ftinspect/engine/engine.hpp

@@ -145,6 +145,8 @@ public:
    QString namedInstanceName(int fontIndex,
                              long faceIndex,
                              int index);
 +  unsigned defaultNamedInstanceIndex(int fontIndex,
 +                                int faceIndex);
    bool currentFontTricky();
    bool currentFontBitmapOnly();
@@ -286,6 +288,7 @@ private:
    void queryEngine();
    void loadPaletteInfos();
 +  void switchNamedInstance(int index);
    // It is safe to put the implementation into the corresponding cpp file.
    template <class Func>

src/ftinspect/engine/mmgx.cpp

@@ -10,7 +10,8 @@
  MMGXState
 -MMGXAxisInfo::get(Engine* engine,
 +MMGXAxisInfo::get(Engine* engine,
 +                  unsigned namedInstanceIndex,
                    std::vector<MMGXAxisInfo>& infos)
+ {
    auto face = engine->currentFallbackFtFace();
@@ -37,6 +38,12 @@ MMGXAxisInfo::get(Engine* engine,
      return state;
+   }
 +  FT_Var_Named_Style* namedInstance = nullptr;
 +  // named instance index starts from 1, but we need to reference using a
 +  // 0-based index.
 +  if (namedInstanceIndex > 0 && namedInstanceIndex <= mm->num_namedstyles)
 +    namedInstance = &mm->namedstyle[namedInstanceIndex - 1];
++
    infos.resize(mm->num_axis);
    auto& sfnt = engine->currentFontSFNTNames();
@@ -54,6 +61,9 @@ MMGXAxisInfo::get(Engine* engine,
      FT_Get_Var_Axis_Flags(mm, i, &flags);
      info.hidden = (flags & FT_VAR_AXIS_FLAG_HIDDEN) != 0;
 +    if (namedInstance)
 +      info.def = namedInstance->coords[i] / 65536.0;
++
      auto nameSet = false;
      if (state == MMGXState::GX_OVF)
+     {

src/ftinspect/engine/mmgx.hpp

@@ -33,6 +33,7 @@ struct MMGXAxisInfo
    bool isMM;
    static MMGXState get(Engine* engine,
 +                       unsigned namedInstanceIndex,
                         std::vector<MMGXAxisInfo>& infos);

src/ftinspect/widgets/tripletselector.cpp

@@ -162,7 +162,7 @@ TripletSelector::repopulateNamedInstances(bool fontSwitched)
    newFaces.reserve(newSize);
    for (long i = 0; i < newSize; i++)
+   {
 -    newFaces.emplace_back(engine_->namedInstanceName(fontIndex, faceIndex, i));
 +    newFaces.emplace_back(engine_->namedInstanceName(fontIndex, faceIndex, i + 1));
      if (!needToRecreate && newFaces[i] != niComboBox_->itemData(i))
        needToRecreate = true;
+   }
@@ -181,16 +181,19 @@ TripletSelector::repopulateNamedInstances(bool fontSwitched)
      QSignalBlocker blk3(niComboBox_);
      niComboBox_->clear();
 -    for (long i = 0; i < newSize; i++)
 +    // Returned index starts from 1, therefore minus 1.
 +    auto defaultId = engine_->defaultNamedInstanceIndex(fontIndex, faceIndex) - 1;
 +    for (unsigned i = 0; i < static_cast<unsigned>(newSize); i++)
+     {
        auto& name = newFaces[i];
 -      auto displayName = QString("%1: %2").arg(i).arg(name);
 -      if (i == 0)
 -        displayName = "* " + displayName;
 +      auto displayName = QString("%1: %2").arg(i + 1).arg(name);
 +      if (i == defaultId)
 +        displayName = displayName + " (default)";
        niComboBox_->addItem(displayName, name);
+     }
 -    niComboBox_->setCurrentIndex(0);
 +    if (defaultId >= 0 && newSize > 0)
 +      niComboBox_->setCurrentIndex(static_cast<int>(defaultId));
      // Note: no signal is emitted from any combobox until this block ends.
+   }
@@ -460,10 +463,9 @@ TripletSelector::loadTriplet()
    if (faceIndex < 0)
      faceIndex = 0;
 -  if (instanceIndex < 0)
 -    instanceIndex = 0;
+-
 -  engine_->loadFont(fontIndex, faceIndex, instanceIndex);
 +  if (instanceIndex < 0 || niComboBox_->count() == 0)
 +    instanceIndex = -1; // No instance available.
 +  engine_->loadFont(fontIndex, faceIndex, instanceIndex + 1);
    // TODO: This may mess up with bitmap-only fonts.
    if (!engine_->fontValid())

From:	Charlie Jiang (@cqjjjzr)
Subject:	[Git][freetype/freetype-demos][master] 2 commits: [ftinspect] Fix named instances switching.
Date:	Sun, 06 Aug 2023 19:56:11 +0000