Enumeration

VipsForeignPngFilter

Declaration 

flags Vips.ForeignPngFilter

Description [src]

The values mirror those of png.h in libpng.

Members

VIPS_FOREIGN_PNG_FILTER_NONE

No filtering.

  • Value: 8
  • Available since: 8.0
VIPS_FOREIGN_PNG_FILTER_SUB

Difference to the left.

  • Value: 16
  • Available since: 8.0
VIPS_FOREIGN_PNG_FILTER_UP

Difference up.

  • Value: 32
  • Available since: 8.0
VIPS_FOREIGN_PNG_FILTER_AVG

Average of left and up.

  • Value: 64
  • Available since: 8.0
VIPS_FOREIGN_PNG_FILTER_PAETH

Pick best neighbor predictor automatically.

  • Value: 128
  • Available since: 8.0
VIPS_FOREIGN_PNG_FILTER_ALL

Adaptive.

  • Value: 248
  • Available since: 8.0