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

allow specifying the mask colour in wxImage::ConvertAlphaToMask() (closes #10143)

Browse Source 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58404 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2009-01-25 17:23:39 +00:00
parent 4b2214224f
commit c1099d9254
3 changed files with 56 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
interface/wx/image.h
View File

@@ -519,19 +519,49 @@ public:
*/
unsigned long ComputeHistogram(wxImageHistogram& histogram) const;
//@{
/**
If the image has alpha channel, this method converts it to mask.
All pixels with alpha value less than @a threshold are replaced with mask
colour and the alpha channel is removed. Mask colour is chosen automatically
using FindFirstUnusedColour().
If the image image doesn't have alpha channel, ConvertAlphaToMask() does nothing.
If the image has an alpha channel, all pixels with alpha value less
than @a threshold are replaced with the mask colour and the alpha
channel is removed. Otherwise nothing is done.
The mask colour is chosen automatically using
FindFirstUnusedColour() by this function, see the overload below if you
this is not appropriate.
@return @false if FindFirstUnusedColour returns @false, @true otherwise.
*/
bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
/**
If the image has alpha channel, this method converts it to mask using
the specified colour as the mask colour.
If the image has an alpha channel, all pixels with alpha value less
than @a threshold are replaced with the mask colour and the alpha
channel is removed. Otherwise nothing is done.
@since 2.9.0
@param mr
The red component of the mask colour.
@param mg
The green component of the mask colour.
@param mb
The blue component of the mask colour.
@param threshold
Pixels with alpha channel values below the given threshold are
considered to be transparent, i.e. the corresponding mask pixels
are set. Pixels with the alpha values above the threshold are
considered to be opaque.
*/
void ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
//@}
/**
Returns a greyscale version of the image.