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Showing content from http://libvips.github.io/libvips/API/current/method.Image.gifsave_buffer.html below:

Vips.Image.gifsave_buffer

int
vips_gifsave_buffer (
  VipsImage* in,
  void** buf,
  size_t* len,
  ...
)

As vips_gifsave(), but save to a memory buffer.

The address of the buffer is returned in buf, the length of the buffer in len. You are responsible for freeing the buffer with g_free() when you are done with it.

Optional arguments

• dither: gdouble, quantisation dithering level
• effort: gint, quantisation CPU effort
• bitdepth: gint, number of bits per pixel
• interframe_maxerror: gdouble, maximum inter-frame error for transparency
• reuse: gboolean, reuse palette from input
• interlace: gboolean, write an interlaced (progressive) GIF
• interpalette_maxerror: gdouble, maximum inter-palette error for palette reusage
• keep_duplicate_frames: gboolean, keep duplicate frames in the output instead of combining them

This method is not directly available to language bindings.

buf

Type: An array of guint8

Return output buffer here.

The length of the array is specified in the len argument. The data is owned by the caller of the method.

len

Type: size_t*

Return output length here.

The data is owned by the caller of the method.

...

Type: 

NULL-terminated list of optional named arguments.

Type: int

0 on success, -1 on error.

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