[Palettefx] How to get colors/ sample the palette?

[iamdanielv]

Anyone using Palettefx to get custom colors?

I want to use one of the palettes for layer notification, but don't know how to query the palette.

I see this in the code for palettefx.inc , but not sure how to use the code from my keymap.c file.

static const uint16_t* palettefx_get_palette_data(void);
static hsv_t palettefx_interp_color(const uint16_t* palette, uint8_t x);

Any help / tips / examples would be appreciated.

High level I think it would be something like

uint16 mypalette = palettefx_get_palette_data();
hsv_t mycolor = palettefx_interp_color(mypalette, 64); // where 64 is the desired h value

Or am I thinking about this wrong?

[getreuer]

@iamdanielv thanks for bringing this up!

I had scoped PaletteFx's functions (palettefx_interp_color, etc.) within the file defining RGB matrix effects, thinking that they are only useful there. I had not considered that these functions may be useful outside that context, but you're right, they could be.

I just pushed commit d666813 to revise such that thes functions are now usable from keymap.c (the change amounting to adding their declarations to palettefx.h and removing static qualifiers):

• palettefx_get_palette_data()
  Gets the color data for the selected palette.

• palettefx_get_palette_data_by_index(i)
  Gets the color data for the ith palette.

• palettefx_num_palettes()
  Returns the number of palettes.

• palettefx_interp_color(palette, x)
  Computes the interpolated HSV palette color at 0 <= x < 256.

This makes it possible to do something like this in keymap.c:

const uint16_t* palette = palettefx_get_palette_data_by_index(
    PALETTEFX_CARNIVAL);
hsv_t color = palettefx_interp_color(palette, 64);

[iamdanielv]

That's great! Thanks for providing a solution and all of your awesome contributions to QMK. You Rock!