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

Add support for alpha channel in colours in wxSVGFileDC.

Browse Source 
Use stroke-opacity and fill-opacity SVG attributes to handle pens and brushes
created from colours with alpha channel in wxSVGFileDC.

Closes #13086.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67373 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2011-04-02 16:37:54 +00:00
parent b72ed64277
commit 403695b323
3 changed files with 71 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
interface/wx/dc.h
View File

@@ -113,7 +113,7 @@ struct wxFontMetrics
wxWidgets offers an alternative drawing API based on the modern drawing
backends GDI+, CoreGraphics and Cairo. See wxGraphicsContext, wxGraphicsRenderer
and related classes. There is also a wxGCDC linking the APIs by offering
the wxDC API ontop of a wxGraphicsContext.
the wxDC API on top of a wxGraphicsContext.
wxDC is an abstract base class and cannot be created directly.
Use wxPaintDC, wxClientDC, wxWindowDC, wxScreenDC, wxMemoryDC or
@@ -153,9 +153,14 @@ struct wxFontMetrics
@section dc_alpha_support Support for Transparency / Alpha Channel
On Mac OS X colours with alpha channel are supported. Instances of wxPen
or wxBrush that are built from wxColour use the colour's alpha values
when stroking or filling.
In general wxDC methods don't support alpha transparency and the alpha
component of wxColour is simply ignored and you need to use wxGraphicsContext
for full transparency support. There are, however, a few exceptions: first,
under Mac OS X colours with alpha channel are supported in all the normal
wxDC-derived classes as they use wxGraphicsContext internally. Second,
under all platforms wxSVGFileDC also fully supports alpha channel. In both
of these cases the instances of wxPen or wxBrush that are built from
wxColour use the colour's alpha values when stroking or filling.
@library{wxcore}