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fosphor/gl_cmap_gen: Introduce a new 'prog' colormap 

This color map was originally given to me by 'prog', the sdr# author,
then I tweaked it a bit.

Note that there is currently no way to select it other than changing
the code.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2014-07-22 09:29:55 +02:00
parent 9d09c6b4c5
commit 39f4b52431
2 changed files with 54 additions and 0 deletions
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53
lib/fosphor/gl_cmap_gen.c
View File

@ -268,4 +268,57 @@ fosphor_gl_cmap_png(uint32_t *rgba, int N, void *arg)
#endif
int
fosphor_gl_cmap_prog(uint32_t *rgba, int N, void *arg)
{
const struct {
float p;
float rgb[3];
} colors[] = {
{ .p = 0.0f, .rgb = { 0.29f, 0.00f, 0.00f } },
{ .p = 1.0f, .rgb = { 0.46f, 0.00f, 0.00f } },
{ .p = 2.0f, .rgb = { 0.62f, 0.00f, 0.00f } },
{ .p = 3.0f, .rgb = { 0.78f, 0.00f, 0.00f } },
{ .p = 4.0f, .rgb = { 1.00f, 0.00f, 0.00f } },
{ .p = 5.0f, .rgb = { 1.00f, 0.43f, 0.10f } },
{ .p = 6.0f, .rgb = { 1.00f, 1.00f, 0.00f } },
{ .p = 7.0f, .rgb = { 1.00f, 1.00f, 1.00f } },
{ .p = 8.0f, .rgb = { 0.11f, 0.56f, 1.00f } },
{ .p = 9.0f, .rgb = { 0.00f, 0.00f, 0.57f } },
{ .p = 10.0f, .rgb = { 0.00f, 0.00f, 0.31f } },
{ .p = 11.0f, .rgb = { 0.00f, 0.00f, 0.19f } },
{ .p = 12.0f, .rgb = { 0.00f, 0.00f, 0.12f } },
};
const int NC = 12;
int i;
for (i=0; i<N; i++)
{
float rgb[3];
float p = 1.0f - ((1.0f * i) / (N - 1));
float ps = p * 9.0f;
float m;
int li, j;
/* Scan for li */
for (li=0; li<(NC-1) && colors[li+1].p < ps; li++);
/* Linear interpolation */
ps -= colors[li].p;
ps /= colors[li+1].p - colors[li].p;
m = ps;
/* Mix */
for (j=0; j<3; j++)
rgb[j] = colors[li].rgb[j] * (1.0f - m) + colors[li+1].rgb[j] * m;
/* Set resulting color */
_set_rgba_from_rgb(&rgba[i], rgb[0], rgb[1], rgb[2]);
}
return 0;
}
/*! @} */

1
lib/fosphor/gl_cmap_gen.h
View File

@ -21,6 +21,7 @@
int fosphor_gl_cmap_histogram(uint32_t *rgba, int N, void *arg);
int fosphor_gl_cmap_waterfall(uint32_t *rgba, int N, void *arg);
int fosphor_gl_cmap_prog(uint32_t *rgba, int N, void *arg);
int fosphor_gl_cmap_png(uint32_t *rgba, int N, void *rsrc_name);
/*! @} */