bufferSetContentType

Sets the type of buffer contents. Buffers are either empty, contain characters (before shaping), or contain glyphs (the result of shaping).

You rarely need to call this function, since a number of other functions transition the content type for you. Namely:

• A newly created buffer starts with content type

[harfbuzz.types.BufferContentType.Invalid]. Calling [harfbuzz.global.bufferReset], [harfbuzz.global.bufferClearContents], as well as calling [harfbuzz.global.bufferSetLength] with an argument of zero all set the buffer content type to invalid as well.

• Calling [harfbuzz.global.bufferAddUtf8], [harfbuzz.global.bufferAddUtf16],

[harfbuzz.global.bufferAddUtf32], [harfbuzz.global.bufferAddCodepoints] and [harfbuzz.global.bufferAddLatin1] expect that buffer is either empty and have a content type of invalid, or that buffer content type is [harfbuzz.types.BufferContentType.Unicode], and they also set the content type to Unicode if they added anything to an empty buffer.

• Finally [harfbuzz.global.shape] and [harfbuzz.global.shapeFull] expect that the buffer

is either empty and have content type of invalid, or that buffer content type is [harfbuzz.types.BufferContentType.Unicode], and upon success they set the buffer content type to [harfbuzz.types.BufferContentType.Glyphs].

The above transitions are designed such that one can use a buffer in a loop of "reset : add-text : shape" without needing to ever modify the content type manually.

Parameters

buffer	An #hb_buffer_t
contentType	The type of buffer contents to set