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pngsave: allow valid bitdepth of 16 (#2515)

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Lovell Fuller 2021-11-04 16:39:12 +00:00 committed by GitHub
parent 30fdc3df77
commit a274a2f7e6
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1 changed files with 6 additions and 5 deletions
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11
libvips/foreign/pngsave.c
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@ -258,10 +258,10 @@ vips_foreign_save_png_class_init( VipsForeignSavePngClass *class )
VIPS_ARG_INT( class, "bitdepth", 17,
_( "Bit depth" ),
_( "Write as a 1, 2, 4 or 8 bit image" ),
_( "Write as a 1, 2, 4, 8 or 16 bit image" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSavePng, bitdepth ),
0, 8, 0 );
0, 16, 0 );
VIPS_ARG_INT( class, "effort", 18,
_( "Effort" ),
@ -472,7 +472,7 @@ vips_foreign_save_png_buffer_init( VipsForeignSavePngBuffer *buffer )
* * @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 or 8
* * @bitdepth: %gint, set write bit depth to 1, 2, 4, 8 or 16
* * @effort: %gint, quantisation CPU effort
*
* Write a VIPS image to a file as PNG.
@ -507,6 +507,7 @@ vips_foreign_save_png_buffer_init( VipsForeignSavePngBuffer *buffer )
* (1 is the fastest, 10 is the slowest, 7 is the default).
* This feature requires libvips to be compiled with libimagequant.
*
* The default @bitdepth is either 8 or 16 depending on the interpretation.
* You can also set @bitdepth for mono and mono + alpha images, and the image
* will be quantized.
*
@ -546,7 +547,7 @@ vips_pngsave( VipsImage *in, const char *filename, ... )
* * @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 or 8
* * @bitdepth: %gint, set write bit depth to 1, 2, 4, 8 or 16
* * @effort: %gint, quantisation CPU effort
*
* As vips_pngsave(), but save to a memory buffer.
@ -602,7 +603,7 @@ vips_pngsave_buffer( VipsImage *in, void **buf, size_t *len, ... )
* * @palette: enable quantisation to 8bpp palette
* * @Q: quality for 8bpp quantisation
* * @dither: amount of dithering for 8bpp quantization
* * @bitdepth: %gint, set write bit depth to 1, 2, 4 or 8
* * @bitdepth: %gint, set write bit depth to 1, 2, 4, 8 or 16
* * @effort: %gint, quantisation CPU effort
*
* As vips_pngsave(), but save to a target.