Add SDF HintingMode

src/modules/font/Rasterizer.h

@@ -147,6 +147,7 @@ class Rasterizer : public Object
 
  FontMetrics metrics;
  float dpiScale;
+ bool sdf;
 
 }; // Rasterizer
 

src/modules/font/TrueTypeRasterizer.h

@@ -49,6 +49,7 @@ class TrueTypeRasterizer : public Rasterizer
  {
  Hinting hinting = HINTING_NORMAL;
  OptionalFloat dpiScale;
+ bool sdf = false;
  };
 
  virtual ~TrueTypeRasterizer() {}

src/modules/font/freetype/TrueTypeRasterizer.cpp

@@ -40,6 +40,8 @@ TrueTypeRasterizer::TrueTypeRasterizer(FT_Library library, love::Data *data, int
  dpiScale = settings.dpiScale.get(defaultdpiscale);
  size = floorf(size * dpiScale + 0.5f);
 
+ sdf = settings.sdf;
+
  if (size <= 0)
  throw love::Exception("Invalid TrueType font size: %d", size);
 
@@ -119,13 +121,26 @@ GlyphData *TrueTypeRasterizer::getGlyphDataForIndex(int index) const
  throw love::Exception("TrueType Font glyph error: FT_Get_Glyph failed (0x%x)", err);
 
  FT_Render_Mode rendermode = FT_RENDER_MODE_NORMAL;
- if (hinting == HINTING_MONO)
+ if (sdf)
+ rendermode = FT_RENDER_MODE_SDF;
+ else if (hinting == HINTING_MONO)
  rendermode = FT_RENDER_MODE_MONO;
 
  err = FT_Glyph_To_Bitmap(&ftglyph, rendermode, 0, 1);
 
  if (err != FT_Err_Ok)
- throw love::Exception("TrueType Font glyph error: FT_Glyph_To_Bitmap failed (0x%x)", err);
+ {
+ if (rendermode == FT_RENDER_MODE_SDF)
+ {
+ err = FT_Glyph_To_Bitmap(&ftglyph, FT_RENDER_MODE_NORMAL, 0, 1);
+ if (err != FT_Err_Ok)
+ throw love::Exception("TrueType Font glyph error: FT_Glyph_To_Bitmap failed (0x%x)", err);
+ }
+ else
+ {
+ throw love::Exception("TrueType Font glyph error: FT_Glyph_To_Bitmap failed (0x%x)", err);
+ }
+ }
 
  FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph) ftglyph;
  const FT_Bitmap &bitmap = bitmap_glyph->bitmap; //just to make things easier

src/modules/font/wrap_Font.cpp

@@ -95,6 +95,11 @@ static TrueTypeRasterizer::Settings luax_checktruetypesettings(lua_State* L, int
  if (!lua_isnoneornil(L, -1))
  s.dpiScale.set((float)luaL_checknumber(L, -1));
  lua_pop(L, 1);
+
+ lua_getfield(L, startidx, "sdf");
+ if (!lua_isnoneornil(L, -1))
+ s.sdf = lua_toboolean(L, -1);
+ lua_pop(L, 1);
  }
 
  return s;