SDL Wiki
(This function is part of SDL_ttf, a separate library from SDL.)


Opens a font from an SDL_RWops with target resolutions (in DPI).


TTF_Font * TTF_OpenFontIndexDPIRW(SDL_RWops *src, SDL_bool freesrc, int ptsize, long index, unsigned int hdpi, unsigned int vdpi);

Function Parameters

src an SDL_RWops to provide a font file's data.
freesrc SDL_TRUE to close the RWops when the font is closed, SDL_FALSE to leave it open.
ptsize point size to use for the newly-opened font.
index index of the face in the font file.
hdpi the target horizontal DPI.
vdpi the target vertical DPI.

Return Value

Returns a valid TTF_Font, or NULL on error.


DPI scaling only applies to scalable fonts (e.g. TrueType).

Some .fon fonts will have several sizes embedded in the file, so the point size becomes the index of choosing which size. If the value is too high, the last indexed size will be the default.

If freesrc is SDL_TRUE the RWops will be automatically closed once the font is closed. Otherwise you should close the RWops yourself after closing the font.

Some fonts have multiple "faces" included. The index specifies which face to use from the font file. Font files with only one face should specify zero for the index.

When done with the returned TTF_Font, use TTF_CloseFont() to dispose of it.


This function is available since SDL_ttf 3.0.0.


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