Techniques for text rendering using font patching

A device comprising:

• a memory subsystem comprising:
• read-write memory, and
• read-only memory that stores a first font file;
• and
• a processor coupled to the memory subsystem that:
• receives a first font patch file for storage in the read-write memory,
• wherein:
• each of the first font file and the first font patch file is associated with a first font and a first language,
• the first font file includes a first set of glyphs that is associated with the first font and used to render characters for display,
• the first font patch file includes a second set of glyphs that is associated with the first font and used to render characters for display, wherein the second set of glyphs includes at least one glyph that is not included in the first set of glyphs, and
• the first set of glyphs is static;
• determines that a first text string includes a first set of characters that is to be rendered;
• determines that a first priority list specifies that the first font file is to be searched before the first font patch file;
• upon searching at least the first font file, retrieves, from at least one of the first font file and the first font patch file depending on whether a first glyph is included in the first set of glyphs, the first glyph corresponding to a first character included in the first set of characters;
• and
• renders at least a portion of the first text string using the first glyph.

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause the one or more processors to render characters for display by performing the steps of:

• receiving, subsequent to a first font file being stored in read-only memory, a first font patch file for storage in read-write memory, wherein:
• each of the first font file and the first font patch file is associated with a first font and a first language,
• the first font file includes a first set of glyphs that is associated with the first font and used to render characters for display,
• the first font patch file includes a second set of glyphs that is associated with the first font and used to render characters for display, wherein the second set of glyphs includes at least one glyph that is not included in the first set of glyphs, and
• the first set of glyphs is static;
• determining that a first text string includes a first set of characters that is to be rendered;
• retrieving, from at least one of the first font file and the first font patch file depending on whether a first glyph is included in the first set of glyphs, the first glyph corresponding to a first character included in the first set of characters;
• and
• rendering at least a portion of the first text string using the first glyph.