Method
GimpImageconvert_indexed
Declaration [src]
gboolean
gimp_image_convert_indexed (
  GimpImage* image,
  GimpConvertDitherType dither_type,
  GimpConvertPaletteType palette_type,
  gint num_cols,
  gboolean alpha_dither,
  gboolean remove_unused,
  const gchar* palette
)
Description [src]
Convert specified image to and Indexed image
This procedure converts the specified image to ‘indexed’ color. This process requires an image in RGB or Grayscale mode. The ‘palette_type’ specifies what kind of palette to use, A type of ‘0’ means to use an optimal palette of ‘num_cols’ generated from the colors in the image. A type of ‘1’ means to re-use the previous palette (not currently implemented). A type of ‘2’ means to use the so-called WWW-optimized palette. Type ‘3’ means to use only black and white colors. A type of ‘4’ means to use a palette from the gimp palettes directories. The ‘dither type’ specifies what kind of dithering to use. ‘0’ means no dithering, ‘1’ means standard Floyd-Steinberg error diffusion, ‘2’ means Floyd-Steinberg error diffusion with reduced bleeding, ‘3’ means dithering based on pixel location (‘Fixed’ dithering).
Parameters
- dither_type
- 
            Type: GimpConvertDitherTypeThe dither type to use. 
- palette_type
- 
            Type: GimpConvertPaletteTypeThe type of palette to use. 
- num_cols
- 
            Type: gintThe number of colors to quantize to, ignored unless (palette_type == GIMP_CONVERT_PALETTE_GENERATE). 
- alpha_dither
- 
            Type: gbooleanDither transparency to fake partial opacity. 
- remove_unused
- 
            Type: gbooleanRemove unused or duplicate color entries from final palette, ignored if (palette_type == GIMP_CONVERT_PALETTE_GENERATE). 
- palette
- 
            Type: const gchar*The name of the custom palette to use, ignored unless (palette_type == GIMP_CONVERT_PALETTE_CUSTOM). The data is owned by the caller of the method. The value is a NUL terminated UTF-8 string.