Vips.Image.webpsave_buffer (original) (raw)

Method

VipsImagewebpsave_buffer

Declaration [src]

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

Description [src]

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

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

Optional arguments

• Q: gint, quality factor
• lossless: gboolean, enables lossless compression
• preset: VipsForeignWebpPreset, choose lossy compression preset
• smart_subsample: gboolean, enables high quality chroma subsampling
• smart_deblock: gboolean, enables auto-adjusting of the deblocking filter
• near_lossless: gboolean, preprocess in lossless mode (controlled by Q)
• alpha_q: gint, set alpha quality in lossless mode
• effort: gint, level of CPU effort to reduce file size
• target_size: gint, desired target size in bytes
• passes: gint, number of entropy-analysis passes
• min_size: gboolean, minimise size
• mixed: gboolean, allow both lossy and lossless encoding
• kmin: gint, minimum number of frames between keyframes
• kmax: gint, maximum number of frames between keyframes

This method is not directly available to language bindings.

Parameters

buf

Type: An array of guint8

Return output buffer here.

len

Type: size_t*

Return output length here.

The argument will be set by the function.

...

Type: ``

NULL-terminated list of optional named arguments.

Return value

Type: int

0 on success, -1 on error.