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operations: Replace GimpHSL in Color Balance operation

This commit is contained in:
Alx Sa 2024-09-21 19:07:38 -04:00 committed by Jehan
parent 0a7119028f
commit 3cfadbf078
1 changed files with 57 additions and 55 deletions
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112
app/operations/gimpoperationcolorbalance.c
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@ -129,70 +129,72 @@ gimp_operation_color_balance_process (GeglOperation *operation,
GimpColorBalanceConfig *config = GIMP_COLOR_BALANCE_CONFIG (point->config);
gfloat *src = in_buf;
gfloat *dest = out_buf;
gint total;
const Babl *space;
const Babl *format;
const Babl *hsl_format;
gfloat *hsl;
gfloat *rgb_n;
gint i;
if (! config)
return FALSE;
while (samples--)
total = samples * 4;
format = gegl_operation_get_format (operation, "input");
space = gegl_operation_get_source_space (operation, "input");
hsl_format = babl_format_with_space ("HSLA float", space);
hsl = g_new0 (gfloat, sizeof (gfloat) * total);
rgb_n = g_new0 (gfloat, sizeof (gfloat) * total);
/* Create HSL buffer */
babl_process (babl_fish (format, hsl_format), src, hsl, samples);
/* Create normalized RGB buffer */
for (i = 0; i < total; i += 4)
{
gfloat r = src[RED];
gfloat g = src[GREEN];
gfloat b = src[BLUE];
gfloat r_n;
gfloat g_n;
gfloat b_n;
rgb_n[i] =
gimp_operation_color_balance_map (src[i], hsl[i + 2],
config->cyan_red[GIMP_TRANSFER_SHADOWS],
config->cyan_red[GIMP_TRANSFER_MIDTONES],
config->cyan_red[GIMP_TRANSFER_HIGHLIGHTS]);
GimpRGB rgb = { r, g, b};
GimpHSL hsl;
rgb_n[i + 1] =
gimp_operation_color_balance_map (src[i + 1], hsl[i + 2],
config->magenta_green[GIMP_TRANSFER_SHADOWS],
config->magenta_green[GIMP_TRANSFER_MIDTONES],
config->magenta_green[GIMP_TRANSFER_HIGHLIGHTS]);
gimp_rgb_to_hsl (&rgb, &hsl);
rgb_n[i + 2] =
gimp_operation_color_balance_map (src[i + 2], hsl[i + 2],
config->yellow_blue[GIMP_TRANSFER_SHADOWS],
config->yellow_blue[GIMP_TRANSFER_MIDTONES],
config->yellow_blue[GIMP_TRANSFER_HIGHLIGHTS]);
r_n = gimp_operation_color_balance_map (r, hsl.l,
config->cyan_red[GIMP_TRANSFER_SHADOWS],
config->cyan_red[GIMP_TRANSFER_MIDTONES],
config->cyan_red[GIMP_TRANSFER_HIGHLIGHTS]);
g_n = gimp_operation_color_balance_map (g, hsl.l,
config->magenta_green[GIMP_TRANSFER_SHADOWS],
config->magenta_green[GIMP_TRANSFER_MIDTONES],
config->magenta_green[GIMP_TRANSFER_HIGHLIGHTS]);
b_n = gimp_operation_color_balance_map (b, hsl.l,
config->yellow_blue[GIMP_TRANSFER_SHADOWS],
config->yellow_blue[GIMP_TRANSFER_MIDTONES],
config->yellow_blue[GIMP_TRANSFER_HIGHLIGHTS]);
if (config->preserve_luminosity)
{
GimpHSL hsl2;
rgb.r = r_n;
rgb.g = g_n;
rgb.b = b_n;
gimp_rgb_to_hsl (&rgb, &hsl);
rgb.r = r;
rgb.g = g;
rgb.b = b;
gimp_rgb_to_hsl (&rgb, &hsl2);
hsl.l = hsl2.l;
gimp_hsl_to_rgb (&hsl, &rgb);
r_n = rgb.r;
g_n = rgb.g;
b_n = rgb.b;
}
dest[RED] = r_n;
dest[GREEN] = g_n;
dest[BLUE] = b_n;
dest[ALPHA] = src[ALPHA];
src += 4;
dest += 4;
rgb_n[i + 3] = src[i + 3];
}
if (config->preserve_luminosity)
{
gfloat *hsl_n = g_new0 (gfloat, sizeof (gfloat) * total);
babl_process (babl_fish (format, hsl_format), rgb_n, hsl_n, samples);
/* Copy the original lightness value */
for (i = 0; i < total; i += 4)
hsl_n[i + 2] = hsl[i + 2];
babl_process (babl_fish (hsl_format, format), hsl_n, rgb_n, samples);
g_free (hsl_n);
}
/* Copy normalized RGB back to destination */
for (i = 0; i < total; i++)
dest[i] = rgb_n[i];
g_free (hsl);
g_free (rgb_n);
return TRUE;
}