Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add support for bilinear resize algorithm to wxImage.

Browse Source 
Add wxIMAGE_QUALITY_BILINEAR in addition to the existing wxIMAGE_QUALITY_BICUBIC,
it is supposed to be much faster yet yield almost the same results.

Closes #11034.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61791 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2009-08-30 21:11:37 +00:00
parent 16b0c55398
commit 180f3c7461
4 changed files with 209 additions and 81 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
include/wx/image.h
View File

@@ -56,10 +56,18 @@ enum wxImageResolution
};
// Constants for wxImage::Scale() for determining the level of quality
enum
enum wxImageResizeQuality
{
wxIMAGE_QUALITY_NORMAL = 0,
wxIMAGE_QUALITY_HIGH = 1
// different image resizing algorithms used by Scale() and Rescale()
wxIMAGE_QUALITY_NEAREST = 0,
wxIMAGE_QUALITY_BILINEAR = 1,
wxIMAGE_QUALITY_BICUBIC = 2,
// default quality is low (but fast)
wxIMAGE_QUALITY_NORMAL = wxIMAGE_QUALITY_NEAREST,
// highest (but best) quality
wxIMAGE_QUALITY_HIGH = wxIMAGE_QUALITY_BICUBIC
};
// alpha channel values: fully transparent, default threshold separating
@@ -308,10 +316,13 @@ public:
void Paste( const wxImage &image, int x, int y );
// return the new image with size width*height
wxImage Scale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) const;
wxImage Scale( int width, int height,
wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL ) const;
// box averager and bicubic filters for up/down sampling
wxImage ResampleNearest(int width, int height) const;
wxImage ResampleBox(int width, int height) const;
wxImage ResampleBilinear(int width, int height) const;
wxImage ResampleBicubic(int width, int height) const;
// blur the image according to the specified pixel radius
@@ -322,7 +333,9 @@ public:
wxImage ShrinkBy( int xFactor , int yFactor ) const ;
// rescales the image in place
wxImage& Rescale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) { return *this = Scale(width, height, quality); }
wxImage& Rescale( int width, int height,
wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL )
{ return *this = Scale(width, height, quality); }
// resizes the image in place
wxImage& Resize( const wxSize& size, const wxPoint& pos,