/**
* cd_util_create_x11_gamma:
**/
static gboolean
cd_util_create_x11_gamma (CdUtilPrivate *priv,
CdDom *dom,
const GNode *root,
GError **error)
{
const GNode *tmp;
gboolean ret;
gdouble fraction;
CdColorRGB rgb;
gdouble points[3];
guint16 data[3][256];
guint i, j;
/* parse gamma values */
tmp = cd_dom_get_node (dom, root, "x11_gamma");
if (tmp == NULL) {
g_set_error_literal (error, 1, 0, "XML error, expected x11_gamma");
return FALSE;
}
if (!cd_dom_get_node_rgb (tmp, &rgb)) {
g_set_error_literal (error, 1, 0, "XML error, invalid x11_gamma");
return FALSE;
}
points[0] = rgb.R;
points[1] = rgb.G;
points[2] = rgb.B;
/* create a bog-standard sRGB profile */
priv->lcms_profile = cmsCreate_sRGBProfileTHR (cd_icc_get_context (priv->icc));
if (priv->lcms_profile == NULL) {
g_set_error_literal (error, 1, 0, "failed to create profile");
return FALSE;
}
/* scale all the values by the floating point values */
for (i = 0; i < 256; i++) {
fraction = (gdouble) i / 256.0f;
for (j = 0; j < 3; j++)
data[j][i] = fraction * points[j] * 0xffff;
}
/* write vcgt */
ret = set_vcgt_from_data (priv->lcms_profile,
data[0],
data[1],
data[2],
256);
if (!ret) {
g_set_error_literal (error, 1, 0,
"failed to write VCGT");
return FALSE;
}
return TRUE;
}
cmsHPROFILE CMSEXPORT cmsCreate_sRGBProfile(void)
{
return cmsCreate_sRGBProfileTHR(NULL);
}
/**
* cd_util_create_temperature:
**/
static gboolean
cd_util_create_temperature (CdUtilPrivate *priv,
CdDom *dom,
const GNode *root,
GError **error)
{
CdColorRGB white_point;
const GNode *tmp;
const guint size = 256;
gboolean ret;
gdouble curve_gamma;
guint16 data[3][256];
guint i;
guint temp;
/* create a bog-standard sRGB profile */
priv->lcms_profile = cmsCreate_sRGBProfileTHR (cd_icc_get_context (priv->icc));
if (priv->lcms_profile == NULL) {
g_set_error_literal (error, 1, 0,
"failed to create profile");
return FALSE;
}
/* parse temperature value */
tmp = cd_dom_get_node (dom, root, "temperature");
if (tmp == NULL) {
g_set_error_literal (error, 1, 0, "XML error, expected temperature");
return FALSE;
}
temp = atoi (cd_dom_get_node_data (tmp));
/* parse gamma value */
tmp = cd_dom_get_node (dom, root, "gamma");
if (tmp == NULL) {
g_set_error_literal (error, 1, 0, "XML error, expected gamma");
return FALSE;
}
curve_gamma = cd_dom_get_node_data_as_double (tmp);
if (curve_gamma == G_MAXDOUBLE) {
g_set_error (error, 1, 0,
"failed to parse gamma: '%s'",
cd_dom_get_node_data (tmp));
return FALSE;
}
/* generate the VCGT table */
cd_color_get_blackbody_rgb (temp, &white_point);
for (i = 0; i < size; i++) {
data[0][i] = pow ((gdouble) i / size, 1.0 / curve_gamma) *
0xffff * white_point.R;
data[1][i] = pow ((gdouble) i / size, 1.0 / curve_gamma) *
0xffff * white_point.G;
data[2][i] = pow ((gdouble) i / size, 1.0 / curve_gamma) *
0xffff * white_point.B;
}
/* write vcgt */
ret = set_vcgt_from_data (priv->lcms_profile,
data[0],
data[1],
data[2],
256);
if (!ret) {
g_set_error_literal (error, 1, 0, "failed to write VCGT");
return FALSE;
}
return TRUE;
}
// Virtual profiles are handled here.
cmsHPROFILE OpenStockProfile(cmsContext ContextID, const char* File)
{
if (!File)
return cmsCreate_sRGBProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*Lab2") == 0)
return cmsCreateLab2ProfileTHR(ContextID, NULL);
if (cmsstrcasecmp(File, "*Lab4") == 0)
return cmsCreateLab4ProfileTHR(ContextID, NULL);
if (cmsstrcasecmp(File, "*Lab") == 0)
return cmsCreateLab4ProfileTHR(ContextID, NULL);
if (cmsstrcasecmp(File, "*LabD65") == 0) {
cmsCIExyY D65xyY;
cmsWhitePointFromTemp( &D65xyY, 6504);
return cmsCreateLab4ProfileTHR(ContextID, &D65xyY);
}
if (cmsstrcasecmp(File, "*XYZ") == 0)
return cmsCreateXYZProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*Gray22") == 0) {
cmsToneCurve* Curve = cmsBuildGamma(ContextID, 2.2);
cmsHPROFILE hProfile = cmsCreateGrayProfileTHR(ContextID, cmsD50_xyY(), Curve);
cmsFreeToneCurve(Curve);
return hProfile;
}
if (cmsstrcasecmp(File, "*Gray30") == 0) {
cmsToneCurve* Curve = cmsBuildGamma(ContextID, 3.0);
cmsHPROFILE hProfile = cmsCreateGrayProfileTHR(ContextID, cmsD50_xyY(), Curve);
cmsFreeToneCurve(Curve);
return hProfile;
}
if (cmsstrcasecmp(File, "*srgb") == 0)
return cmsCreate_sRGBProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*null") == 0)
return cmsCreateNULLProfileTHR(ContextID);
if (cmsstrcasecmp(File, "*Lin2222") == 0) {
cmsToneCurve* Gamma = cmsBuildGamma(0, 2.2);
cmsToneCurve* Gamma4[4];
cmsHPROFILE hProfile;
Gamma4[0] = Gamma4[1] = Gamma4[2] = Gamma4[3] = Gamma;
hProfile = cmsCreateLinearizationDeviceLink(cmsSigCmykData, Gamma4);
cmsFreeToneCurve(Gamma);
return hProfile;
}
return cmsOpenProfileFromFileTHR(ContextID, File, "r");
}
