Use fixed screen DPI of 96 when printing HTML.

Unlike font sizes, which depend on screen resolution because of weird
wxFont API, pixel sizes used elsewhere (and in particular, for images)
shouldn't depend on screen DPI.

This finally makes the output independent of screen size.

Fixes #10942.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63781 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/html/winpars.h

@@ -52,7 +52,8 @@ public:
     // Set's the DC used for parsing. If SetDC() is not called,
     // parsing won't proceed
     virtual void SetDC(wxDC *dc, double pixel_scale = 1.0)
-        { m_DC = dc; m_PixelScale = pixel_scale; }
+        { SetDC(dc, pixel_scale, pixel_scale); }
+    void SetDC(wxDC *dc, double pixel_scale, double font_scale);
 
     wxDC *GetDC() {return m_DC;}
     double GetPixelScale() {return m_PixelScale;}
@@ -171,7 +172,7 @@ private:
         // temporary variables used by AddText
     wxHtmlWindowInterface *m_windowInterface;
             // window we're parsing for
-    double m_PixelScale;
+    double m_PixelScale, m_FontScale;
     wxDC *m_DC;
             // Device Context we're parsing for
     static wxList m_Modules;