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## com.trolltech.qt.gui
Class QPainter.CompositionMode

    java.lang.Object
      java.lang.Enum
          com.trolltech.qt.gui.QPainter.CompositionMode

All Implemented Interfaces:
  QtEnumerator, java.io.Serializable, java.lang.Comparable

Enclosing class:
  QPainter

    public static final class QPainter.CompositionMode

extends java.lang.Enum
implements QtEnumerator

Defines the Porter-Duff rules for digital image compositing. Composition modes are used to specify how the pixels in one image, the source, are merged with the pixel in another image, the destination.

The most common type is `SourceOver` (often referred to as just alpha blending) where the source pixel is blended on top of the destination pixel in such a way that the alpha component of the source defines the translucency of the pixel.

When the paint device is a `QImage`, the image format must be set to `Format_ARGB32Premultiplied` or `Format_ARGB32` for the composition modes to have any effect. For performance the premultiplied version is the preferred format.

When a composition mode is set it applies to all painting operator, pens, brushes, gradients and pixmap/image drawing.

See also:
  `compositionMode()`, `setCompositionMode()`, `Composition Modes`, and Image Composition Example.

See Also:
  Serialized Form

Field Summary
`static QPainter.CompositionMode` | `CompositionMode_Clear` The pixels in the destination are cleared (set to fully transparent) independent of the source.
`static QPainter.CompositionMode` | `CompositionMode_ColorBurn` The destination color is darkened to reflect the source color.
`static QPainter.CompositionMode` | `CompositionMode_ColorDodge` The destination color is brightened to reflect the source color.
`static QPainter.CompositionMode` | `CompositionMode_Darken` The darker of the source and destination colors is selected.
`static QPainter.CompositionMode` | `CompositionMode_Destination`
`static QPainter.CompositionMode` | `CompositionMode_DestinationAtop` The destination pixel is blended on top of the source, with the alpha of the destination pixel is reduced by the alpha of the destination pixel.
`static QPainter.CompositionMode` | `CompositionMode_DestinationIn` The output is the destination, where the alpha is reduced by that of the source.
`static QPainter.CompositionMode` | `CompositionMode_DestinationOut` The output is the destination, where the alpha is reduced by the inverse of the source.
`static QPainter.CompositionMode` | `CompositionMode_DestinationOver` The alpha of the destination is used to blend it on top of the source pixels.
`static QPainter.CompositionMode` | `CompositionMode_Difference` Subtracts the darker of the colors from the lighter.
`static QPainter.CompositionMode` | `CompositionMode_Exclusion` Similar to `CompositionMode_Difference` , but with a lower contrast.
`static QPainter.CompositionMode` | `CompositionMode_HardLight` Multiplies or screens the colors depending on the source color.
`static QPainter.CompositionMode` | `CompositionMode_Lighten` The lighter of the source and destination colors is selected.
`static QPainter.CompositionMode` | `CompositionMode_Multiply` The output is the source color multiplied by the destination.
`static QPainter.CompositionMode` | `CompositionMode_Overlay` Multiplies or screens the colors depending on the destination color.
`static QPainter.CompositionMode` | `CompositionMode_Plus` Both the alpha and color of the source and destination pixels are added together.
`static QPainter.CompositionMode` | `CompositionMode_Screen` The source and destination colors are inverted and then multiplied.
`static QPainter.CompositionMode` | `CompositionMode_SoftLight` Darkens or lightens the colors depending on the source color.
`static QPainter.CompositionMode` | `CompositionMode_Source`
`static QPainter.CompositionMode` | `CompositionMode_SourceAtop` The source pixel is blended on top of the destination, with the alpha of the source pixel reduced by the alpha of the destination pixel.
`static QPainter.CompositionMode` | `CompositionMode_SourceIn` The output is the source, where the alpha is reduced by that of the destination.
`static QPainter.CompositionMode` | `CompositionMode_SourceOut` The output is the source, where the alpha is reduced by the inverse of destination.
`static QPainter.CompositionMode` | `CompositionMode_SourceOver` This is the default mode.
`static QPainter.CompositionMode` | `CompositionMode_Xor` The source, whose alpha is reduced with the inverse of the destination alpha, is merged with the destination, whose alpha is reduced by the inverse of the source alpha.

Method Summary
`static QPainter.CompositionMode` | `resolve(int value)` Returns the CompositionMode constant with the specified `int`.
`int` | `value()` This function should return an integer value for the enum values of the enumeration that implements this interface.
`static QPainter.CompositionMode` | `valueOf(java.lang.String name)`
`static QPainter.CompositionMode[]` | `values()`

Methods inherited from class java.lang.Enum
`clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

Methods inherited from class java.lang.Object
`getClass, notify, notifyAll, wait, wait, wait`

Field Detail

### CompositionMode_SourceOver

    public static final QPainter.CompositionMode CompositionMode_SourceOver

  This is the default mode. The alpha of the source is used to blend the pixel on top of the destination.

### CompositionMode_DestinationOver

    public static final QPainter.CompositionMode CompositionMode_DestinationOver

  The alpha of the destination is used to blend it on top of the source pixels. This mode is the inverse of `CompositionMode_SourceOver` .

### CompositionMode_Clear

    public static final QPainter.CompositionMode CompositionMode_Clear

  The pixels in the destination are cleared (set to fully transparent) independent of the source.

### CompositionMode_Source

    public static final QPainter.CompositionMode CompositionMode_Source

### CompositionMode_Destination

    public static final QPainter.CompositionMode CompositionMode_Destination

### CompositionMode_SourceIn

    public static final QPainter.CompositionMode CompositionMode_SourceIn

  The output is the source, where the alpha is reduced by that of the destination.

### CompositionMode_DestinationIn

    public static final QPainter.CompositionMode CompositionMode_DestinationIn

  The output is the destination, where the alpha is reduced by that of the source. This mode is the inverse of `CompositionMode_SourceIn` .

### CompositionMode_SourceOut

    public static final QPainter.CompositionMode CompositionMode_SourceOut

  The output is the source, where the alpha is reduced by the inverse of destination.

### CompositionMode_DestinationOut

    public static final QPainter.CompositionMode CompositionMode_DestinationOut

  The output is the destination, where the alpha is reduced by the inverse of the source. This mode is the inverse of `CompositionMode_SourceOut` .

### CompositionMode_SourceAtop

    public static final QPainter.CompositionMode CompositionMode_SourceAtop

  The source pixel is blended on top of the destination, with the alpha of the source pixel reduced by the alpha of the destination pixel.

### CompositionMode_DestinationAtop

    public static final QPainter.CompositionMode CompositionMode_DestinationAtop

  The destination pixel is blended on top of the source, with the alpha of the destination pixel is reduced by the alpha of the destination pixel. This mode is the inverse of `CompositionMode_SourceAtop` .

### CompositionMode_Xor

    public static final QPainter.CompositionMode CompositionMode_Xor

  The source, whose alpha is reduced with the inverse of the destination alpha, is merged with the destination, whose alpha is reduced by the inverse of the source alpha. `CompositionMode_Xor` is not the same as the bitwise Xor.

### CompositionMode_Plus

    public static final QPainter.CompositionMode CompositionMode_Plus

  Both the alpha and color of the source and destination pixels are added together.

### CompositionMode_Multiply

    public static final QPainter.CompositionMode CompositionMode_Multiply

  The output is the source color multiplied by the destination. Multiplying a color with white leaves the color unchanged, while multiplying a color with black produces black.

### CompositionMode_Screen

    public static final QPainter.CompositionMode CompositionMode_Screen

  The source and destination colors are inverted and then multiplied. Screening a color with white produces white, whereas screening a color with black leaves the color unchanged.

### CompositionMode_Overlay

    public static final QPainter.CompositionMode CompositionMode_Overlay

  Multiplies or screens the colors depending on the destination color. The destination color is mixed with the source color to reflect the lightness or darkness of the destination.

### CompositionMode_Darken

    public static final QPainter.CompositionMode CompositionMode_Darken

  The darker of the source and destination colors is selected.

### CompositionMode_Lighten

    public static final QPainter.CompositionMode CompositionMode_Lighten

  The lighter of the source and destination colors is selected.

### CompositionMode_ColorDodge

    public static final QPainter.CompositionMode CompositionMode_ColorDodge

  The destination color is brightened to reflect the source color. A black source color leaves the destination color unchanged.

### CompositionMode_ColorBurn

    public static final QPainter.CompositionMode CompositionMode_ColorBurn

  The destination color is darkened to reflect the source color. A white source color leaves the destination color unchanged.

### CompositionMode_HardLight

    public static final QPainter.CompositionMode CompositionMode_HardLight

  Multiplies or screens the colors depending on the source color. A light source color will lighten the destination color, whereas a dark source color will darken the destination color.

### CompositionMode_SoftLight

    public static final QPainter.CompositionMode CompositionMode_SoftLight

  Darkens or lightens the colors depending on the source color. Similar to `CompositionMode_HardLight` .

### CompositionMode_Difference

    public static final QPainter.CompositionMode CompositionMode_Difference

  Subtracts the darker of the colors from the lighter. Painting with white inverts the destination color, whereas painting with black leaves the destination color unchanged.

### CompositionMode_Exclusion

    public static final QPainter.CompositionMode CompositionMode_Exclusion

  Similar to `CompositionMode_Difference` , but with a lower contrast. Painting with white inverts the destination color, whereas painting with black leaves the destination color unchanged.

Method Detail

### values

    public static QPainter.CompositionMode[] values()

### valueOf

    public static QPainter.CompositionMode valueOf(java.lang.String name)

### value

    public int value()

  This function should return an integer value for the enum values of the enumeration that implements this interface.

  Specified by:
    `value` in interface `QtEnumerator`

### resolve

    public static QPainter.CompositionMode resolve(int value)

  Returns the CompositionMode constant with the specified `int`.

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