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/* this is taken from recent versions of libeog based on Ross Burton's patch */
/*
* right now we return the parsed profile rather than the data to avoid wrapping the XFree
* as well.
*/
#include <config.h>
#include <gtk/gtk.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <gdk/gdkx.h>
#include <lcms.h>
cmsHPROFILE *
f_screen_get_profile (GdkScreen *screen)
{
Display *dpy;
Atom icc_atom, type;
int format;
gulong nitems;
gulong bytes_after;
guchar *str;
int result;
cmsHPROFILE *profile;
dpy = GDK_DISPLAY_XDISPLAY (gdk_screen_get_display (screen));
icc_atom = gdk_x11_get_xatom_by_name_for_display (gdk_screen_get_display (screen), "_ICC_PROFILE");
result = XGetWindowProperty (dpy, GDK_WINDOW_XID (gdk_screen_get_root_window (screen)),
icc_atom, 0, G_MAXLONG,
False, XA_CARDINAL, &type, &format, &nitems,
&bytes_after, (guchar **)&str);
/* TODO: handle bytes_after != 0 */
if (nitems) {
profile = cmsOpenProfileFromMem(str, nitems);
XFree (str);
return profile;
} else
return NULL;
}
typedef struct {
double Exposure;
double Brightness;
double Contrast;
double Hue;
double Saturation;
cmsCIEXYZ WPsrc, WPdest;
} BCHSWADJUSTS, *LPBCHSWADJUSTS;
static
int bchswSampler(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
cmsCIELab LabIn, LabOut;
cmsCIELCh LChIn, LChOut;
cmsCIEXYZ XYZ;
double l;
double power;
gboolean shift;
LPBCHSWADJUSTS bchsw = (LPBCHSWADJUSTS) Cargo;
cmsLabEncoded2Float(&LabIn, In);
// Move white point in Lab
cmsLab2XYZ(&bchsw ->WPsrc, &XYZ, &LabIn);
cmsXYZ2Lab(&bchsw ->WPdest, &LabIn, &XYZ);
shift = (LabIn.L > 0.5);
l = LabIn.L / 100;
if (shift)
l = 1.0 - l;
if (l < 0.0)
l = 0.0;
if (bchsw->Contrast < 0)
power = 1.0 + bchsw->Contrast;
else
power = (bchsw->Contrast == 1.0) ? 127 : 1.0 / (1.0 - bchsw->Contrast);
l = 0.5 * pow (l * 2.0 , power);
if (shift)
l = 1.0 - l;
LabIn.L = l * 100;
cmsLab2LCh(&LChIn, &LabIn);
// Do some adjusts on LCh
LChOut.L = LChIn.L * bchsw ->Exposure + bchsw ->Brightness;
LChOut.C = MAX (0, LChIn.C + bchsw ->Saturation);
LChOut.h = LChIn.h + bchsw ->Hue;
cmsLCh2Lab(&LabOut, &LChOut);
// Back to encoded
cmsFloat2LabEncoded(Out, &LabOut);
return TRUE;
}
// Creates an abstract profile operating in Lab space for Brightness,
// contrast, Saturation and white point displacement
cmsHPROFILE LCMSEXPORT f_cmsCreateBCHSWabstractProfile(int nLUTPoints,
double Exposure,
double Bright,
double Contrast,
double Hue,
double Saturation,
LPcmsCIExyY current_wp,
LPcmsCIExyY destination_wp,
LPGAMMATABLE Tables [])
{
cmsHPROFILE hICC;
LPLUT Lut;
BCHSWADJUSTS bchsw;
cmsCIExyY WhitePnt;
bchsw.Exposure = Exposure;
bchsw.Brightness = Bright;
bchsw.Contrast = Contrast;
bchsw.Hue = Hue;
bchsw.Saturation = Saturation;
cmsxyY2XYZ(&bchsw.WPsrc, current_wp);
cmsxyY2XYZ(&bchsw.WPdest, destination_wp);
hICC = _cmsCreateProfilePlaceholder();
if (!hICC) // can't allocate
return NULL;
cmsSetDeviceClass(hICC, icSigAbstractClass);
cmsSetColorSpace(hICC, icSigLabData);
cmsSetPCS(hICC, icSigLabData);
cmsSetRenderingIntent(hICC, INTENT_PERCEPTUAL);
// Creates a LUT with 3D grid only
Lut = cmsAllocLUT();
cmsAlloc3DGrid(Lut, nLUTPoints, 3, 3);
if (Tables != NULL)
cmsAllocLinearTable (Lut, Tables, 1);
if (!cmsSample3DGrid(Lut, bchswSampler, (LPVOID) &bchsw, 0)) {
// Shouldn't reach here
cmsFreeLUT(Lut);
cmsCloseProfile(hICC);
return NULL;
}
// Create tags
cmsAddTag(hICC, icSigDeviceMfgDescTag, (LPVOID) "(f-spot internal)");
cmsAddTag(hICC, icSigProfileDescriptionTag, (LPVOID) "f-spot BCHSW abstract profile");
cmsAddTag(hICC, icSigDeviceModelDescTag, (LPVOID) "BCHSW built-in");
cmsAddTag(hICC, icSigMediaWhitePointTag, (LPVOID) cmsD50_XYZ());
cmsAddTag(hICC, icSigAToB0Tag, (LPVOID) Lut);
// LUT is already on virtual profile
cmsFreeLUT(Lut);
// Ok, done
return hICC;
}
LPGAMMATABLE
f_cms_gamma_table_new (unsigned short data[], int start, int length)
{
LPGAMMATABLE table = cmsAllocGamma (length);
int i;
if (!table)
return NULL;
data += start;
for (i = 0; i < length; i++)
table->GammaTable [i] = data [i];
g_warning ("table %p, count = %d v[0] = %d", table, table->nEntries, table->GammaTable [0]);
return table;
}
ushort *
f_cms_gamma_table_get_values (LPGAMMATABLE table)
{
return &(table->GammaTable [0]);
}
int
f_cms_gamma_table_get_count (LPGAMMATABLE table)
{
return table->nEntries;
}
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