LICCProfile::ConvertCurveTypeToBuffer

#include "ltwrappr.h"

L_INT LICCProfile::ConvertCurveTypeToBuffer(pData, pIccTagCurveType)

L_UCHAR L_FAR * pData;	/* pointer to a buffer */
pICCTAG_CURVE_TYPE pIccTagCurveType;	/* pointer to a structure */

Converts the information of an ICCTAG_PARAMETRIC_CURVE_TYPE structure into one buffer of sequential bytes.

Parameter	Description
pData	Pointer to a buffer to be updated with the converted information as one buffer of sequential bytes.

pIccTagCurveType

Pointer to an ICCTAG_PARAMETRIC_CURVE_TYPE structure that contains the information to be converted into one buffer of sequential data.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

The user must allocate the pData parameter. Its size must be equal to the size in bytes of the structure pointed to by pIccTagParametricCurveType parameter.

The size of pData buffer can be calculated as follows: 4 + 4 + 2 + 2 + 4 * number of parameters retrieved by calling LICCProfile::GetParametricCurveNumberOfParameters function. For more information, refer to the ICC.1:2004-10 specification page 56.

Required DLLs and Libraries

LTCLR

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:	LICCProfile::GetParametricCurveNumberOfParameters, LICCProfile::DoubleToU8Fixed8Number, LICCProfile::U8Fixed8NumberToDouble, LICCProfile::ConvertCLUTToBuffer, LICCProfile::ConvertParametricCurveTypeToBuffer, LICCProfile::SetProfileId
Topics:	ICC Profile Functions: Tags
	Using ICC Profile Functions

Example

void CICCProfileDlg::FillIccCurveType(ICCTAG_CURVE_TYPE * iccCurveType)
{
   LICCProfile ICCProfile;

   // preparing curve data, it consists of domain and range values
   // if we have 1 value, it should be of type IccU8Fixed8Number,
   // and if we have more than 1 value, their type should be IccUInt16Number,
   // in this example we will use 1 value, look at the VB example for more
   // than 1 value curve data example
   // for more information about domain and range values refer to
   // ICC.1:2004-10 specification page 39.

   // create the new iccCurveType

   iccCurveType->Curve.uCurveCount = 1;
   iccCurveType->Curve.pCurveData = (L_IccUInt16Number*) GlobalAllocPtr(GHND, sizeof(L_IccUInt16Number));

   if(iccCurveType->Curve.pCurveData)
   {
      iccCurveType->Curve.pCurveData[0] = ICCProfile.DoubleToU8Fixed8Number(1.5);
   }

   // define the tag base
   iccCurveType->tagBase.Signature = CurveTypeSig;
}

/* This example converts an ICCTAG_CURVE_TYPE structure into a buffer */
void CICCProfileDlg::OnConvertCurveTypeToBuffer()
{
   LICCProfile ICCProfile;

   ICCTAG_CURVE_TYPE iccCurveType;

   L_UCHAR * pData = NULL;
   L_INT nDataSize;

   // fill the curve type tag
   memset(&iccCurveType, 0, sizeof(ICCTAG_CURVE_TYPE));
   FillIccCurveType(&iccCurveType);

   // calculate the data size
   nDataSize = 4 + 4 + 4 + 2 * iccCurveType.Curve.uCurveCount;

   // then allocate the destination data pointer
   pData = (L_UCHAR *) GlobalAllocPtr(GHND, nDataSize * sizeof(L_UCHAR));
   if (pData)
   {
      int nRet = 0;
      // now convert it into buffer
      nRet = ICCProfile.ConvertCurveTypeToBuffer(pData, &iccCurveType);
   }
}