// Approximate a blackbody illuminant based on CHAD information
static
cmsFloat64Number CHAD2Temp(const cmsMAT3* Chad)
{
// Convert D50 across inverse CHAD to get the absolute white point
cmsVEC3 d, s;
cmsCIEXYZ Dest;
cmsCIExyY DestChromaticity;
cmsFloat64Number TempK;
cmsMAT3 m1, m2;
m1 = *Chad;
if (!_cmsMAT3inverse(&m1, &m2)) return FALSE;
s.n[VX] = cmsD50_XYZ() -> X;
s.n[VY] = cmsD50_XYZ() -> Y;
s.n[VZ] = cmsD50_XYZ() -> Z;
_cmsMAT3eval(&d, &m2, &s);
Dest.X = d.n[VX];
Dest.Y = d.n[VY];
Dest.Z = d.n[VZ];
cmsXYZ2xyY(&DestChromaticity, &Dest);
if (!cmsTempFromWhitePoint(&TempK, &DestChromaticity))
return -1.0;
return TempK;
}
static void
gcm_picker_refresh_results (GcmPickerPrivate *priv)
{
cmsCIExyY xyY;
cmsHPROFILE profile_lab;
cmsHPROFILE profile_rgb;
cmsHPROFILE profile_xyz;
cmsHTRANSFORM transform_error;
cmsHTRANSFORM transform_lab;
cmsHTRANSFORM transform_rgb;
gboolean ret;
CdColorLab color_lab;
CdColorRGB8 color_rgb;
CdColorXYZ color_error;
CdColorXYZ color_xyz;
gdouble temperature = 0.0f;
GtkImage *image;
GtkLabel *label;
g_autoptr(GdkPixbuf) pixbuf = NULL;
g_autofree gchar *text_ambient = NULL;
g_autofree gchar *text_error = NULL;
g_autofree gchar *text_lab = NULL;
g_autofree gchar *text_rgb = NULL;
g_autofree gchar *text_temperature = NULL;
g_autofree gchar *text_whitepoint = NULL;
g_autofree gchar *text_xyz = NULL;
/* nothing set yet */
if (priv->profile_filename == NULL)
return;
/* copy as we're modifying the value */
cd_color_xyz_copy (&priv->last_sample, &color_xyz);
/* create new pixbuf of the right size */
image = GTK_IMAGE (gtk_builder_get_object (priv->builder, "image_preview"));
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
gtk_widget_get_allocated_width (GTK_WIDGET (image)),
gtk_widget_get_allocated_height (GTK_WIDGET (image)));
/* lcms scales these for some reason */
color_xyz.X /= 100.0f;
color_xyz.Y /= 100.0f;
color_xyz.Z /= 100.0f;
/* get profiles */
profile_xyz = cmsCreateXYZProfile ();
profile_rgb = cmsOpenProfileFromFile (priv->profile_filename, "r");
profile_lab = cmsCreateLab4Profile (cmsD50_xyY ());
/* create transforms */
transform_rgb = cmsCreateTransform (profile_xyz, TYPE_XYZ_DBL,
profile_rgb, TYPE_RGB_8,
INTENT_PERCEPTUAL, 0);
if (transform_rgb == NULL)
return;
transform_lab = cmsCreateTransform (profile_xyz, TYPE_XYZ_DBL,
profile_lab, TYPE_Lab_DBL,
INTENT_PERCEPTUAL, 0);
if (transform_lab == NULL)
return;
transform_error = cmsCreateTransform (profile_rgb, TYPE_RGB_8,
profile_xyz, TYPE_XYZ_DBL,
INTENT_PERCEPTUAL, 0);
if (transform_error == NULL)
return;
cmsDoTransform (transform_rgb, &color_xyz, &color_rgb, 1);
cmsDoTransform (transform_lab, &color_xyz, &color_lab, 1);
cmsDoTransform (transform_error, &color_rgb, &color_error, 1);
/* destroy lcms state */
cmsDeleteTransform (transform_rgb);
cmsDeleteTransform (transform_lab);
cmsDeleteTransform (transform_error);
cmsCloseProfile (profile_xyz);
cmsCloseProfile (profile_rgb);
cmsCloseProfile (profile_lab);
/* set XYZ */
label = GTK_LABEL (gtk_builder_get_object (priv->builder, "label_xyz"));
text_xyz = g_strdup_printf ("%.3f, %.3f, %.3f",
priv->last_sample.X,
priv->last_sample.Y,
priv->last_sample.Z);
gtk_label_set_label (label, text_xyz);
/* set LAB */
label = GTK_LABEL (gtk_builder_get_object (priv->builder, "label_lab"));
text_lab = g_strdup_printf ("%.3f, %.3f, %.3f",
color_lab.L,
color_lab.a,
color_lab.b);
gtk_label_set_label (label, text_lab);
/* set whitepoint */
cmsXYZ2xyY (&xyY, (cmsCIEXYZ *)&priv->last_sample);
label = GTK_LABEL (gtk_builder_get_object (priv->builder, "label_whitepoint"));
text_whitepoint = g_strdup_printf ("%.3f,%.3f [%.3f]",
xyY.x, xyY.y, xyY.Y);
gtk_label_set_label (label, text_whitepoint);
/* set temperature */
ret = cmsTempFromWhitePoint (&temperature, &xyY);
if (ret) {
/* round to nearest 10K */
temperature = (((guint) temperature) / 10) * 10;
}
label = GTK_LABEL (gtk_builder_get_object (priv->builder, "label_temperature"));
text_temperature = g_strdup_printf ("%.0fK", temperature);
gtk_label_set_label (label, text_temperature);
/* set RGB */
label = GTK_LABEL (gtk_builder_get_object (priv->builder, "label_rgb"));
text_rgb = g_strdup_printf ("%i, %i, %i (#%02X%02X%02X)",
color_rgb.R, color_rgb.G, color_rgb.B,
color_rgb.R, color_rgb.G, color_rgb.B);
gtk_label_set_label (label, text_rgb);
gcm_picker_set_pixbuf_color (pixbuf, color_rgb.R, color_rgb.G, color_rgb.B);
/* set error */
label = GTK_LABEL (gtk_builder_get_object (priv->builder, "label_error"));
if (color_xyz.X > 0.01f &&
color_xyz.Y > 0.01f &&
color_xyz.Z > 0.01f) {
text_error = g_strdup_printf ("%.1f%%, %.1f%%, %.1f%%",
ABS ((color_error.X - color_xyz.X) / color_xyz.X * 100),
ABS ((color_error.Y - color_xyz.Y) / color_xyz.Y * 100),
ABS ((color_error.Z - color_xyz.Z) / color_xyz.Z * 100));
gtk_label_set_label (label, text_error);
} else {
/* TRANSLATORS: this is when the error is invalid */
gtk_label_set_label (label, _("Unknown"));
}
/* set ambient */
label = GTK_LABEL (gtk_builder_get_object (priv->builder, "label_ambient"));
if (priv->last_ambient < 0) {
/* TRANSLATORS: this is when the ambient light level is unknown */
gtk_label_set_label (label, _("Unknown"));
} else {
text_ambient = g_strdup_printf ("%.1f Lux", priv->last_ambient);
gtk_label_set_label (label, text_ambient);
}
/* set image */
gtk_image_set_from_pixbuf (image, pixbuf);
}