diff options
Diffstat (limited to 'vcl/inc/vcl/bitmap.hxx')
| -rw-r--r-- | vcl/inc/vcl/bitmap.hxx | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/vcl/inc/vcl/bitmap.hxx b/vcl/inc/vcl/bitmap.hxx index 17041d809e74..14aae27f1b62 100644 --- a/vcl/inc/vcl/bitmap.hxx +++ b/vcl/inc/vcl/bitmap.hxx @@ -49,6 +49,7 @@ #define BMP_SCALE_NONE 0x00000000UL #define BMP_SCALE_FAST 0x00000001UL #define BMP_SCALE_INTERPOLATE 0x00000002UL +#define BMP_SCALE_LANCZOS 0x00000003UL // ----------------------------------------------------------------------------- @@ -276,6 +277,18 @@ public: SAL_DLLPRIVATE sal_Bool ImplScaleFast( const double& rScaleX, const double& rScaleY ); SAL_DLLPRIVATE sal_Bool ImplScaleInterpolate( const double& rScaleX, const double& rScaleY ); + SAL_DLLPRIVATE bool ImplScaleLanczos( const double& rScaleX, const double& rScaleY ); + + SAL_DLLPRIVATE void ImplCalculateContributions( const int aSourceSize, const int aDestinationSize, + const double aSupport, const int aNumberOfContributions, + double* pWeights, int* pPixels, int* pCount ); + SAL_DLLPRIVATE bool ImplHorizontalConvolution( Bitmap& aNewBitmap, BitmapReadAccess* pReadAcc, + int aNumberOfContributions, double* pWeights, int* pPixels, int* pCount ); + SAL_DLLPRIVATE bool ImplVerticalConvolution( Bitmap& aNewBitmap, BitmapReadAccess* pReadAcc, + int aNumberOfContributions, double* pWeights, int* pPixels, int* pCount ); + + SAL_DLLPRIVATE static double ImplLanczosKernel( const double aValue, const double aSupport ); + SAL_DLLPRIVATE sal_Bool ImplMakeMono( sal_uInt8 cThreshold ); SAL_DLLPRIVATE sal_Bool ImplMakeMonoDither(); SAL_DLLPRIVATE sal_Bool ImplMakeGreyscales( sal_uInt16 nGreyscales ); |