GimpBilinear: GIMP Color Library Reference Manual

+ + +

GimpBilinear

GimpBilinear — Utility functions for bilinear interpolation.

Functions

++++ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

+gdouble +	+gimp_bilinear () +
+guchar +	+gimp_bilinear_8 () +
+guint16 +	+gimp_bilinear_16 () +
+guint32 +	+gimp_bilinear_32 () +
+GimpRGB +	+gimp_bilinear_rgb () +
+GimpRGB +	+gimp_bilinear_rgba () +
+void +	+gimp_bilinear_pixels_8 () +

Description

Utility functions for bilinear interpolation.

Functions

gimp_bilinear ()

gdouble
+gimp_bilinear (gdouble x,
+               gdouble y,
+               gdouble *values);

gimp_bilinear_8 ()

guchar
+gimp_bilinear_8 (gdouble x,
+                 gdouble y,
+                 guchar *values);

gimp_bilinear_16 ()

guint16
+gimp_bilinear_16 (gdouble x,
+                  gdouble y,
+                  guint16 *values);

gimp_bilinear_32 ()

guint32
+gimp_bilinear_32 (gdouble x,
+                  gdouble y,
+                  guint32 *values);

gimp_bilinear_rgb ()

GimpRGB
+gimp_bilinear_rgb (gdouble x,
+                   gdouble y,
+                   GimpRGB *values);

gimp_bilinear_rgba ()

GimpRGB
+gimp_bilinear_rgba (gdouble x,
+                    gdouble y,
+                    GimpRGB *values);

gimp_bilinear_pixels_8 ()

void
+gimp_bilinear_pixels_8 (guchar *dest,
+                        gdouble x,
+                        gdouble y,
+                        guint bpp,
+                        gboolean has_alpha,
+                        guchar **values);

gimp_bilinear_pixels_8 is deprecated and should not be used in newly-written code.

Computes bilinear interpolation of four pixels.

When has_alpha + is FALSE, it's identical to gimp_bilinear_8() on +each channel separately. When has_alpha + is TRUE, it handles +alpha channel correctly.

The pixels in values + correspond to corner x, y coordinates in the +following order: [0,0], [1,0], [0,1], [1,1].

Parameters

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dest	Pixel, where interpolation result is to be stored.
x	x-coordinate (0.0 to 1.0).
y	y-coordinate (0.0 to 1.0).
bpp	Bytes per pixel. `dest` +and each `values` +item is an array of +`bpp` +bytes.
has_alpha	`TRUE` if the last channel is an alpha channel.
values	Array of four pointers to pixels.