| digiKam Developer Documentation Professional Photo Management with the Power of Open Source

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Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | List of all members
Digikam::ImageCurves Class Reference

## Public Types
typedef double | CRMatrix[4][4]
enum | CurveType { CURVE_SMOOTH = 0 , CURVE_FREE }

## Public Member Functions
| ImageCurves (bool sixteenBit)
| ImageCurves (const CurvesContainer &container)
| ImageCurves (const ImageCurves &other)
QByteArray | channelToBinary (int channel) const
| Writes the given channel to a raw binary representation.
void | curvesCalculateAllCurves ()
void | curvesCalculateCurve (int channel)
void | curvesChannelReset (int channel)
float | curvesLutFunc (int n_channels, int channel, float value)
void | curvesLutProcess (uchar *const srcPR, uchar *const destPR, int w, int h)
void | curvesLutSetup (int nchannels)
void | curvesReset ()
| Methods to manipulate the curves data.
void | fillFromOtherCurves (const ImageCurves *const otherCurves)
| Fills this curves with the data supplied by another curves object.
CurvesContainer | getContainer () const
| Returns a container with the settings for all channels of this Curves object.
CurvesContainer | getContainer (int channel) const
| Returns a container containing the values of this Curves object for the given channel, and linear values for all other channels.
QPoint | getCurvePoint (int channel, int point) const
QPolygon | getCurvePoints (int channel) const
int | getCurvePointX (int channel, int point) const
int | getCurvePointY (int channel, int point) const
CurveType | getCurveType (int channel) const
int | getCurveValue (int channel, int bin) const
QPolygon | getCurveValues (int channel) const
bool | isCurvePointEnabled (int channel, int point) const
bool | isDirty () const
| Curves properties.
bool | isLinear () const
bool | isLinear (int channel) const
| Returns true if the curve is linear for the given channel, or all channels.
bool | isSixteenBits () const
bool | loadCurvesFromGimpCurvesFile (const QUrl &fileUrl)
ImageCurves & | operator= (const ImageCurves &other)
bool | saveCurvesToGimpCurvesFile (const QUrl &fileUrl) const
| Methods to save/load the curves values to/from a Gimp curves text file.
bool | setChannelFromBinary (int channel, const QByteArray &array)
| Set the channel from the given raw binary representation.
void | setContainer (const CurvesContainer &container)
void | setCurvePoint (int channel, int point, const QPoint &val)
void | setCurvePoints (int channel, const QPolygon &vals)
void | setCurvePointX (int channel, int point, int x)
void | setCurvePointY (int channel, int point, int y)
void | setCurveType (CurveType type)
void | setCurveType (int channel, CurveType type)
void | setCurveValue (int channel, int bin, int val)
| Methods to set manually the curves values.
void | setCurveValues (int channel, const QPolygon &vals)
void | unsetCurvePoint (int channel, int point)

## Static Public Member Functions
static QPoint | getDisabledValue ()

## Static Public Attributes
static const int | MULTIPLIER_16BIT = 255
| Curve points have to multiplied with this value for 16 bit images.
static const int | NUM_CHANNELS = 5
| Number of channels in a curve.
static const int | NUMBER_OF_POINTS = 17
| The max number of points contained in a curve.

## Member Enumeration Documentation

## ◆ CurveType

enum Digikam::ImageCurves::CurveType

Enumerator
CURVE_SMOOTH | Smooth curve type.
CURVE_FREE | Freehand curve type.

## Member Function Documentation

## ◆ channelToBinary()

QByteArray Digikam::ImageCurves::channelToBinary | ( | int | channel | ) | const

Binary format:

Note that 16bit free curves take a lot of memory (~85kB) while all other forms take less than 400 bytes.

Version 1 :16 Type 0,1,2 : 8 Bytes depth 1,2 : 8 reserved :32 count :32

Type 0 (linear curve): Type 1 (smooth curve): for (0...count) point.x :32 point.y :32 Type 2 (free curve): for (0...count) if (Bytes depth == 1) value : 8 else if (Bytes depth == 2) value :16

In Big Endian byte order. Data then converted to base64.

## ◆ fillFromOtherCurves()

void Digikam::ImageCurves::fillFromOtherCurves | ( | const ImageCurves *const | otherCurves | ) |

This ensures that 8 and 16 bit curves are properly converted.

Parameters

  otherCurves | other curves object to adapt config from

## ◆ setChannelFromBinary()

bool Digikam::ImageCurves::setChannelFromBinary | ( | int | channel,
|  | const QByteArray & | array
| ) |  |

The data is checked for validity, only on valid data true is returned. Note that the bytes depth (isSixteenBits()) of the encoded representation must match the depth of this curves object.

## ◆ setContainer()

void Digikam::ImageCurves::setContainer | ( | const CurvesContainer & | container | ) |

Note
  bits depth must match