Method

VipsImagepngsave_buffer

Declaration [src] 

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

Description [src]

As vips_pngsave(), 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

  • compression: gint, compression level
  • interlace: gboolean, interlace image
  • filter: VipsForeignPngFilter, row filter flag(s)
  • palette: gboolean, enable quantisation to 8bpp palette
  • Q: gint, quality for 8bpp quantisation
  • dither: gdouble, amount of dithering for 8bpp quantization
  • bitdepth: gint, set write bit depth to 1, 2, 4, 8 or 16
  • effort: gint, quantisation CPU effort

See also

vips_pngsave(), vips_image_write_to_file().

This method is not directly available to language bindings.

Parameters

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.

Return value

Type: int

0 on success, -1 on error.