krita
KisAlphaMask Class Reference
#include <kis_alpha_mask.h>
Inherits KShared.
Detailed Description
KisAlphaMask is intended to create alpha values from a QImage for use in brush creation.It is not a generic alpha mask that can be used with KisPaintDevices: use a KisSelection for that.
Definition at line 34 of file kis_alpha_mask.h.
Public Member Functions | |
| KisAlphaMask (const QImage &img) | |
| KisAlphaMask (const QImage &img, bool hasColor) | |
| KisAlphaMask (Q_INT32 width, Q_INT32 height) | |
| Q_INT32 | height () const |
| Q_INT32 | width () const |
| Q_UINT8 | alphaAt (Q_INT32 x, Q_INT32 y) const |
| void | setAlphaAt (Q_INT32 x, Q_INT32 y, Q_UINT8 alpha) |
Static Public Member Functions | |
| static KisAlphaMaskSP | interpolate (KisAlphaMaskSP mask1, KisAlphaMaskSP mask2, double t) |
Constructor & Destructor Documentation
| KisAlphaMask::KisAlphaMask | ( | const QImage & | img | ) |
Create an alpha mask based on the specified QImage.
If the image is not a grayscale, the mask value is calculated from the effective grey level and alpha value.
Definition at line 41 of file kis_alpha_mask.cc.
| KisAlphaMask::KisAlphaMask | ( | const QImage & | img, | |
| bool | hasColor | |||
| ) |
As above except quicker as the image does not need to be scanned to see if it has any colour pixels.
Definition at line 28 of file kis_alpha_mask.cc.
| KisAlphaMask::KisAlphaMask | ( | Q_INT32 | width, | |
| Q_INT32 | height | |||
| ) |
Member Function Documentation
| Q_INT32 KisAlphaMask::height | ( | ) | const |
| Q_INT32 KisAlphaMask::width | ( | ) | const |
| Q_UINT8 KisAlphaMask::alphaAt | ( | Q_INT32 | x, | |
| Q_INT32 | y | |||
| ) | const [inline] |
- Returns:
- the alpha value at the specified position.
XXX: this is, of course, not the best way of masking. Better would be to let KisAlphaMask fill a chunk of memory with the alpha values at the right position, something like void applyMask(Q_UINT8 *pixeldata, Q_INT32 pixelWidth, Q_INT32 alphaPos). That would be fastest, or we could provide an iterator over the mask, that would be nice, too.
Definition at line 80 of file kis_alpha_mask.h.
The documentation for this class was generated from the following files:
