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Replace multiple RescaleBitmap() with wxBitmap::Rescale()

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Define a single function and use it in both wxArtProvider and (the
generic implementation of) wxSearchCtrl instead of repeating the same
code elsewhere.

Note that another, but slightly different, version of RescaleBitmap()
still remains in wxPropertyGrid.

Deprecate undocumented wxArtProvider::RescaleBitmap() which is
completely useless now.

No real changes, this is just a refactoring.
This commit is contained in:
Vadim Zeitlin
2021-09-23 22:46:53 +01:00
parent 46314bd6b1
commit 024c231624
7 changed files with 52 additions and 55 deletions
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27
src/common/bmpbase.cpp
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@@ -64,6 +64,33 @@ wxBitmap wxBitmapHelpers::NewFromPNGData(const void* data, size_t size)
#endif // !__WXOSX__
/* static */
void wxBitmapHelpers::Rescale(wxBitmap& bmp, const wxSize& sizeNeeded)
{
wxCHECK_RET( sizeNeeded.IsFullySpecified(), wxS("New size must be given") );
#if wxUSE_IMAGE
wxImage img = bmp.ConvertToImage();
img.Rescale(sizeNeeded.x, sizeNeeded.y);
bmp = wxBitmap(img);
#else // !wxUSE_IMAGE
// Fallback method of scaling the bitmap
wxBitmap newBmp(sizeNeeded, bmp.GetDepth());
#if defined(__WXMSW__) || defined(__WXOSX__)
// wxBitmap::UseAlpha() is used only on wxMSW and wxOSX.
newBmp.UseAlpha(bmp.HasAlpha());
#endif // __WXMSW__ || __WXOSX__
{
wxMemoryDC dc(newBmp);
double scX = (double)sizeNeeded.GetWidth() / bmp.GetWidth();
double scY = (double)sizeNeeded.GetHeight() / bmp.GetHeight();
dc.SetUserScale(scX, scY);
dc.DrawBitmap(bmp, 0, 0);
}
bmp = newBmp;
#endif // wxUSE_IMAGE/!wxUSE_IMAGE
}
// ----------------------------------------------------------------------------
// wxBitmapBase
// ----------------------------------------------------------------------------