C++ cmsDoTransform函数代码示例

int cmmMultiprofileSampler(WORD In[], WORD Out[], LPVOID Cargo) {
  int i;
  cmsHTRANSFORM* Transforms = (cmsHTRANSFORM*)Cargo;

  // Need to go from In to Out at least once
  cmsDoTransform(Transforms[0], In, Out, 1);
  
  for (i=1; Transforms[i]; i++)
    cmsDoTransform(Transforms[i], Out, Out, 1);
    
  return TRUE;
}

static
int BlackPointUsingPerceptualBlack(LPcmsCIEXYZ BlackPoint, 
                                   cmsHPROFILE hProfile, 
                                   DWORD dwFlags)
{
    cmsHTRANSFORM hPercLab2CMYK, hRelColCMYK2Lab;
    cmsHPROFILE hLab;
    cmsCIELab LabIn, LabOut;
    WORD CMYK[MAXCHANNELS];
    cmsCIEXYZ  BlackXYZ, MediaWhite;        


     if (!cmsIsIntentSupported(hProfile, INTENT_PERCEPTUAL, LCMS_USED_AS_INPUT)) {

        BlackPoint -> X = BlackPoint ->Y = BlackPoint -> Z = 0.0;
        return 0;
    }
   
    hLab = cmsCreateLabProfile(NULL);

    hPercLab2CMYK  = cmsCreateTransform(hLab, TYPE_Lab_DBL, 
                                        hProfile, TYPE_CMYK_16, 
                                        INTENT_PERCEPTUAL, cmsFLAGS_NOTPRECALC);

    hRelColCMYK2Lab = cmsCreateTransform(hProfile, TYPE_CMYK_16, 
                                         hLab, TYPE_Lab_DBL, 
                                         INTENT_RELATIVE_COLORIMETRIC, cmsFLAGS_NOTPRECALC);

    LabIn.L = LabIn.a = LabIn.b = 0;

    cmsDoTransform(hPercLab2CMYK, &LabIn, CMYK, 1);
    cmsDoTransform(hRelColCMYK2Lab, CMYK, &LabOut, 1);

    if (LabOut.L > 50) LabOut.L = 50;
    LabOut.a = LabOut.b = 0;

    cmsDeleteTransform(hPercLab2CMYK);
    cmsDeleteTransform(hRelColCMYK2Lab);
    cmsCloseProfile(hLab);

    cmsLab2XYZ(NULL, &BlackXYZ, &LabOut);   
    
    if (!(dwFlags & LCMS_BPFLAGS_D50_ADAPTED)){
            cmsTakeMediaWhitePoint(&MediaWhite, hProfile);
            cmsAdaptToIlluminant(BlackPoint, cmsD50_XYZ(), &MediaWhite, &BlackXYZ);
    }
    else
            *BlackPoint = BlackXYZ;
   
    return 1;

}

void IccColorProfile::calculateFloatUIMinMax(void)
{
    QVector<KoChannelInfo::DoubleRange> &ret = d->shared->uiMinMaxes;

    cmsHPROFILE cprofile = d->shared->lcmsProfile->lcmsProfile();
    Q_ASSERT(cprofile);

    cmsColorSpaceSignature color_space_sig = cmsGetColorSpace(cprofile);
    unsigned int num_channels = cmsChannelsOf(color_space_sig);
    unsigned int color_space_mask = _cmsLCMScolorSpace(color_space_sig);

    Q_ASSERT(num_channels>=1 && num_channels <=4);  // num_channels==1 is for grayscale, we need to handle it
    Q_ASSERT(color_space_mask);

    // to try to find the max range of float/doubles for this profile,
    // pass in min/max int and make the profile convert that
    // this is far from perfect, we need a better way, if possible to get the "bounds" of a profile

    uint16_t in_min_pixel[4] = {0,0,0,0};
    uint16_t in_max_pixel[4] = {0xFFFF,0xFFFF,0xFFFF,0xFFFF};
    double out_min_pixel[4] = {0,0,0,0};
    double out_max_pixel[4] = {0,0,0,0};

    cmsHTRANSFORM trans = cmsCreateTransform(
        cprofile,
        (COLORSPACE_SH(color_space_mask)|CHANNELS_SH(num_channels)|BYTES_SH(2)),
        cprofile,
        (COLORSPACE_SH(color_space_mask)|FLOAT_SH(1)|CHANNELS_SH(num_channels)|BYTES_SH(0)), //NOTE THAT 'BYTES' FIELD IS SET TO ZERO ON DLB because 8 bytes overflows the bitfield
        INTENT_PERCEPTUAL, 0);      // does the intent matter in this case?

    if (trans) {
        cmsDoTransform(trans, in_min_pixel, out_min_pixel, 1);
        cmsDoTransform(trans, in_max_pixel, out_max_pixel, 1);
        cmsDeleteTransform(trans);
    }//else, we'll just default to [0..1] below

    ret.resize(num_channels);
    for (unsigned int i=0; i<num_channels; ++i) {
        if (out_min_pixel[i] < out_max_pixel[i]) {
            ret[i].minVal = out_min_pixel[i];
            ret[i].maxVal = out_max_pixel[i];
        } else {
            // aparently we can't even guarentee that converted_to_double(0x0000) < converted_to_double(0xFFFF)
            // assume [0..1] in such cases
            // we need to find a really solid way of determining the bounds of a profile, if possible
            ret[i].minVal = 0;
            ret[i].maxVal = 1;
        }
    }
}

static
int SoftProofSampler(register WORD In[], register WORD Out[], register LPVOID Cargo)
{
        LPGAMUTCHAIN t = (LPGAMUTCHAIN) Cargo;
        WORD Colorant[MAXCHANNELS];
                
        // From pcs to colorant
        cmsDoTransform(t -> hForward, In, Colorant, 1);

        // Now, do the inverse, from colorant to pcs.
        cmsDoTransform(t -> hReverse, Colorant, Out, 1);
                
        return TRUE;
}

int main(int argc, char *argv[])
{
    WORD Input[MAXCHANNELS], Output[MAXCHANNELS], PCSLab[MAXCHANNELS], PCSxyz[MAXCHANNELS];

    
    fprintf(stderr, "little cms ColorSpace conversion calculator - v1.8\n\n");

      if (argc == 1)  
              Help();              

      HandleSwitches(argc, argv);

      cmsSetErrorHandler(MyErrorHandler);

      OpenTransforms();
      
      for(;;) {

          if (xisatty(stdin))
              printf("\nEnter values, 'q' to quit\n");

          if (feof(stdin))
              break;

          TakeValues(Input);
          cmsDoTransform(hTrans, Input, Output, 1);

          if (Verbose) {

            if (hTransXYZ) cmsDoTransform(hTransXYZ, Input, PCSxyz, 1);
            if (hTransLab) cmsDoTransform(hTransLab, Input, PCSLab, 1);
          }
                    
          if (xisatty(stdin))
                printf("\n");
         
          PrintResults(Output, OutputColorSpace); printf("\n");

          if (Verbose && hTransXYZ && hTransLab) {

            PrintResults(PCSxyz, icSigXYZData); printf("\n");
            PrintResults(PCSLab, icSigLabData); printf("\n");
          }

      }

          
      return 0;     
}

static
void PrintPCSEncoded(cmsFloat64Number Input[])
{
    if (Verbose > 1 && hTransXYZ && hTransLab) {

        cmsUInt16Number XYZ[3], Lab[3];

        if (hTransXYZ) cmsDoTransform(hTransXYZ, Input, XYZ, 1);
        if (hTransLab) cmsDoTransform(hTransLab, Input, Lab, 1);

        printf("[PCS] Lab=(0x%04X,0x%04X,0x%04X) XYZ=(0x%04X,0x%04X,0x%04X)\n", Lab[0], Lab[1], Lab[2], 
            XYZ[0], XYZ[1], XYZ[2]);

    }
}

void color_man_correct_region(ColorMan *cm, GdkPixbuf *pixbuf, gint x, gint y, gint w, gint h)
{
	ColorManCache *cc;
	guchar *pix;
	gint rs;
	gint i;
	gint pixbuf_width, pixbuf_height;


	pixbuf_width = gdk_pixbuf_get_width(pixbuf);
	pixbuf_height = gdk_pixbuf_get_height(pixbuf);

	cc = cm->profile;

	pix = gdk_pixbuf_get_pixels(pixbuf);
	rs = gdk_pixbuf_get_rowstride(pixbuf);

	w = MIN(w, pixbuf_width - x);
	h = MIN(h, pixbuf_height - y);

	pix += x * ((cc->has_alpha) ? 4 : 3);
	for (i = 0; i < h; i++)
		{
		guchar *pbuf;

		pbuf = pix + ((y + i) * rs);

		cmsDoTransform(cc->transform, pbuf, pbuf, w);
		}

}

static void
jpeg_load_cmyk_to_rgb (guchar   *buf,
                       glong     pixels,
                       gpointer  transform)
{
  const guchar *src  = buf;
  guchar       *dest = buf;

  if (transform)
    {
      cmsDoTransform (transform, buf, buf, pixels);
      return;
    }

  /* NOTE: The following code assumes inverted CMYK values, even when an
     APP14 marker doesn't exist. This is the behavior of recent versions
     of PhotoShop as well. */

  while (pixels--)
    {
      guint c = src[0];
      guint m = src[1];
      guint y = src[2];
      guint k = src[3];

      dest[0] = (c * k) / 255;
      dest[1] = (m * k) / 255;
      dest[2] = (y * k) / 255;

      src  += 4;
      dest += 3;
    }
}

/**
 * cd_icc_effect_generate_cogl_color_data:
 **/
static CoglHandle
cd_icc_effect_generate_cogl_color_data (const gchar *filename, GError **error)
{
  CoglHandle tex = NULL;
  cmsHPROFILE device_profile;
  cmsHPROFILE srgb_profile;
  cmsUInt8Number *data;
  cmsHTRANSFORM transform;
  guint array_size;
  guint r, g, b;
  guint8 *p;

  cmsSetLogErrorHandler (cd_icc_effect_error_cb);

  srgb_profile = cmsCreate_sRGBProfile ();
  device_profile = cmsOpenProfileFromFile (filename, "r");

  /* create a cube and cut itup into parts */
  array_size = GCM_GLSL_LOOKUP_SIZE * GCM_GLSL_LOOKUP_SIZE * GCM_GLSL_LOOKUP_SIZE;
  data = g_new0 (cmsUInt8Number, 3 * array_size);
  transform = cmsCreateTransform (srgb_profile, TYPE_RGB_8, device_profile, TYPE_RGB_8, INTENT_PERCEPTUAL, 0);

  /* we failed */
  if (transform == NULL)
    {
      g_set_error (error, 1, 0, "could not create transform");
      goto out;
    }

  /* create mapping (blue->r, green->t, red->s) */
  for (p = data, b = 0; b < GCM_GLSL_LOOKUP_SIZE; b++) {
    for (g = 0; g < GCM_GLSL_LOOKUP_SIZE; g++) {
      for (r = 0; r < GCM_GLSL_LOOKUP_SIZE; r++)  {
        *(p++) = (r * 255) / (GCM_GLSL_LOOKUP_SIZE - 1);
        *(p++) = (g * 255) / (GCM_GLSL_LOOKUP_SIZE - 1);
        *(p++) = (b * 255) / (GCM_GLSL_LOOKUP_SIZE - 1);
      }
    }
  }

  cmsDoTransform (transform, data, data, array_size);

  /* creates a cogl texture from the data */
  tex = cogl_texture_3d_new_from_data (GCM_GLSL_LOOKUP_SIZE, /* width */
                                       GCM_GLSL_LOOKUP_SIZE, /* height */
                                       GCM_GLSL_LOOKUP_SIZE, /* depth */
                                       COGL_TEXTURE_NO_AUTO_MIPMAP,
                                       COGL_PIXEL_FORMAT_RGB_888,
                                       COGL_PIXEL_FORMAT_ANY,
                                       /* data is tightly packed so we can pass zero */
                                       0, 0,
                                       data, error);
out:
  cmsCloseProfile (device_profile);
  cmsCloseProfile (srgb_profile);
  if (transform != NULL)
    cmsDeleteTransform (transform);
  g_free (data);
  return tex;
}

static gboolean
cd_sensor_get_sample_wait_cb (GTask *task)
{
	CdSensor *sensor = CD_SENSOR (g_task_get_source_object (task));
	CdSensorDummyPrivate *priv = cd_sensor_dummy_get_private (sensor);
	CdColorXYZ *sample = NULL;
	g_autoptr(GError) error = NULL;

	/* never setup */
	if (priv->transform_fake == NULL) {
		g_task_return_new_error (task,
					 CD_SENSOR_ERROR,
					 CD_SENSOR_ERROR_NO_SUPPORT,
					 "no fake transfor set up");
		return G_SOURCE_REMOVE;
	}

	/* run the sample through the profile */
	sample = cd_color_xyz_new ();
	cmsDoTransform (priv->transform_fake, &priv->sample_fake, sample, 1);

	/* emulate */
	cd_sensor_button_pressed (sensor);

	/* just return without a problem */
	g_task_return_pointer (task, sample, (GDestroyNotify) cd_color_xyz_free);
	return G_SOURCE_REMOVE;
}

static VALUE transform_convert(int argc, VALUE *argv, VALUE self){

  if(argc != 4){
    return Qnil;
  }

  cmsHPROFILE hInProfile, hOutProfile;
  cmsHTRANSFORM hTransform;

  VALUE in = rb_iv_get(self, "@in");
  VALUE out = rb_iv_get(self, "@out");

  hInProfile = cmsOpenProfileFromFile(RSTRING(in)->ptr, "r");
  hOutProfile = cmsOpenProfileFromFile(RSTRING(out)->ptr, "r");

  hTransform = cmsCreateTransform(hInProfile, TYPE_CMYK_8,
      hOutProfile, TYPE_RGB_8, INTENT_PERCEPTUAL, 0);

  cmsCloseProfile(hInProfile);
  cmsCloseProfile(hOutProfile);


  //TODO: Remove duplication
  cmsUInt8Number cmyk_temp[4] = { NUM2INT(argv[0]), NUM2INT(argv[1]), NUM2INT(argv[2]), NUM2INT(argv[3]) };;
  cmsUInt8Number rgb_temp[3];

//  printf("Transfrom result is cmyk(%d, %d, %d, %d)\n", cmyk_temp[0], cmyk_temp[1], cmyk_temp[2], cmyk_temp[3]);

  cmsDoTransform(hTransform, cmyk_temp, rgb_temp, 1);


//  printf("Transfrom result is rgb(%d, %d, %d)\n", rgb_temp[0], rgb_temp[1], rgb_temp[2]);

  return rb_ary_new3(3, INT2FIX(rgb_temp[0]), INT2FIX(rgb_temp[1]), INT2FIX(rgb_temp[2]));
}

static
void PrintPCSFloat(cmsFloat64Number Input[])
{
    if (Verbose > 1 && hTransXYZ && hTransLab) {

        cmsCIEXYZ XYZ = { 0, 0, 0 };
        cmsCIELab Lab = { 0, 0, 0 };

        if (hTransXYZ) cmsDoTransform(hTransXYZ, Input, &XYZ, 1);
        if (hTransLab) cmsDoTransform(hTransLab, Input, &Lab, 1);

        printf("[PCS] Lab=(%.4f,%.4f,%.4f) XYZ=(%.4f,%.4f,%.4f)\n", Lab.L, Lab.a, Lab.b, 
            XYZ.X * 100.0, XYZ.Y * 100.0, XYZ.Z * 100.0);

    }
}

static PyObject *
pycms_TransformPixel (PyObject *self, PyObject *args) {

	unsigned char *inbuf;
	int channel1,channel2,channel3,channel4;
	void *transform;
	cmsHTRANSFORM hTransform;
	PyObject *result;

	if (!PyArg_ParseTuple(args, "Oiiii", &transform, &channel1, &channel2, &channel3, &channel4)) {
		Py_INCREF(Py_None);
		return Py_None;
	}

	inbuf=malloc(4);
	inbuf[0]=(unsigned char)channel1;
	inbuf[1]=(unsigned char)channel2;
	inbuf[2]=(unsigned char)channel3;
	inbuf[3]=(unsigned char)channel4;

	hTransform = (cmsHTRANSFORM) PyCObject_AsVoidPtr(transform);

	cmsDoTransform(hTransform, inbuf, inbuf, 1);

	result = Py_BuildValue("[iiii]", inbuf[0], inbuf[1], inbuf[2], inbuf[3]);
	free(inbuf);
	return result;
}

static PyObject *
pycms_TransformPixel2 (PyObject *self, PyObject *args) {

	double channel1,channel2,channel3,channel4;
	unsigned char *inbuf;
	void *transform;
	cmsHTRANSFORM hTransform;
	PyObject *result;

	if (!PyArg_ParseTuple(args, "Odddd", &transform, &channel1, &channel2, &channel3, &channel4)) {
		Py_INCREF(Py_None);
		return Py_None;
	}

	inbuf=malloc(4);
	inbuf[0]=(unsigned char)(channel1*255);
	inbuf[1]=(unsigned char)(channel2*255);
	inbuf[2]=(unsigned char)(channel3*255);
	inbuf[3]=(unsigned char)(channel4*255);

	hTransform = (cmsHTRANSFORM) PyCObject_AsVoidPtr(transform);

	cmsDoTransform(hTransform, inbuf, inbuf, 1);

	result = Py_BuildValue("(dddd)", (double)inbuf[0]/255, (double)inbuf[1]/255,
			(double)inbuf[2]/255, (double)inbuf[3]/255);

	free(inbuf);
	return result;
}

static void
lcms_image_transform_indexed (gint32                    image,
                              cmsHPROFILE               src_profile,
                              cmsHPROFILE               dest_profile,
                              GimpColorRenderingIntent  intent,
                              gboolean                  bpc)
{
  cmsHTRANSFORM    transform;
  guchar          *cmap;
  gint             n_cmap_bytes;
  cmsUInt32Number  format = TYPE_RGB_8;

  cmap = gimp_image_get_colormap (image, &n_cmap_bytes);

  transform = cmsCreateTransform (src_profile,  format,
                                  dest_profile, format,
                                  intent,
                                  cmsFLAGS_NOOPTIMIZE |
                                  (bpc ? cmsFLAGS_BLACKPOINTCOMPENSATION : 0));

  if (transform)
    {
      cmsDoTransform (transform, cmap, cmap, n_cmap_bytes / 3);
      cmsDeleteTransform (transform);
    }
  else
    {
      g_warning ("cmsCreateTransform() failed!");
    }

  gimp_image_set_colormap (image, cmap, n_cmap_bytes);
}