Font pixel densities;

src/api/types/font.c

@@ -14,8 +14,23 @@ int l_lovrFontSetLineHeight(lua_State* L) {
   return 0;
 }
 
+int l_lovrFontGetPixelDensity(lua_State* L) {
+  Font* font = luax_checktype(L, 1, Font);
+  lua_pushnumber(L, lovrFontGetPixelDensity(font));
+  return 1;
+}
+
+int l_lovrFontSetPixelDensity(lua_State* L) {
+  Font* font = luax_checktype(L, 1, Font);
+  float pixelDensity = luaL_optnumber(L, 2, -1);
+  lovrFontSetPixelDensity(font, pixelDensity);
+  return 0;
+}
+
 const luaL_Reg lovrFont[] = {
   { "getLineHeight", l_lovrFontGetLineHeight },
   { "setLineHeight", l_lovrFontSetLineHeight },
+  { "getPixelDensity", l_lovrFontGetPixelDensity },
+  { "setPixelDensity", l_lovrFontSetPixelDensity },
   { NULL, NULL }
 };

src/graphics/font.c

@@ -29,6 +29,7 @@ Font* lovrFontCreate(FontData* fontData) {
   font->fontData = fontData;
   font->texture = NULL;
   font->lineHeight = 1.f;
+  font->pixelDensity = font->fontData->height;
   vec_init(&font->vertices);
   map_init(&font->kerning);
 
@@ -73,7 +74,7 @@ void lovrFontPrint(Font* font, const char* str, mat4 transform, float wrap, Hori
   float cy = -font->fontData->height * .8;
   float u = atlas->width;
   float v = atlas->height;
-  float scale = 1 / (float) font->fontData->height;
+  float scale = 1 / font->pixelDensity;
 
   int len = strlen(str);
   const char* start = str;
@@ -191,6 +192,18 @@ int lovrFontGetKerning(Font* font, unsigned int left, unsigned int right) {
   return kerning;
 }
 
+float lovrFontGetPixelDensity(Font* font) {
+  return font->pixelDensity;
+}
+
+void lovrFontSetPixelDensity(Font* font, float pixelDensity) {
+  if (pixelDensity <= 0) {
+    pixelDensity = font->fontData->height;
+  }
+
+  font->pixelDensity = pixelDensity;
+}
+
 Glyph* lovrFontGetGlyph(Font* font, uint32_t codepoint) {
   char key[6];
   snprintf(key, 6, "%d", codepoint);

src/graphics/font.h

@@ -38,6 +38,7 @@ typedef struct {
   map_int_t kerning;
   vec_float_t vertices;
   float lineHeight;
+  float pixelDensity;
 } Font;
 
 Font* lovrFontCreate(FontData* fontData);
@@ -46,6 +47,8 @@ void lovrFontPrint(Font* font, const char* str, mat4 transform, float wrap, Hori
 float lovrFontGetLineHeight(Font* font);
 void lovrFontSetLineHeight(Font* font, float lineHeight);
 int lovrFontGetKerning(Font* font, unsigned int a, unsigned int b);
+float lovrFontGetPixelDensity(Font* font);
+void lovrFontSetPixelDensity(Font* font, float pixelDensity);
 Glyph* lovrFontGetGlyph(Font* font, uint32_t codepoint);
 void lovrFontAddGlyph(Font* font, Glyph* glyph);
 void lovrFontExpandTexture(Font* font);