Method

VipsImagejpegsave_buffer

Declaration [src] 

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

Description [src]

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

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

Optional arguments

  • Q: gint, quality factor
  • optimize_coding: gboolean, compute optimal Huffman coding tables
  • interlace: gboolean, write an interlaced (progressive) jpeg
  • subsample_mode: VipsForeignSubsample, chroma subsampling mode
  • trellis_quant: gboolean, apply trellis quantisation to each 8x8 block
  • overshoot_deringing: gboolean, overshoot samples with extreme values
  • optimize_scans: gboolean, split DCT coefficients into separate scans
  • quant_table: gint, quantization table index
  • restart_interval: gint, restart interval in mcu

See also

vips_jpegsave(), 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.