Fix acquiring HDC from wxGCDC with non-GDI+ graphics context

HDC can be acquired/released only when wxGCDC is associated with GDI+
graphics context.

Closes #19207.

interface/wx/renderer.h

@@ -306,6 +306,9 @@ public:
     it changes them, so it is safe to assume that the same pen, brush and colours
     that were active before the call to this function are still in effect after it.
 
+    @note Under wxMSW drawing on wxGCDC is possible only if it's associated with
+    GDI+ wxGraphicsContext.
+
     @library{wxcore}
     @category{gdi}
 */

src/msw/graphics.cpp

@@ -3013,13 +3013,9 @@ WXHDC wxGCDC::AcquireHDC()
     if ( !gc )
         return NULL;
 
-#if wxUSE_CAIRO
     // we can't get the HDC if it is not a GDI+ context
-    wxGraphicsRenderer* r1 = gc->GetRenderer();
-    wxGraphicsRenderer* r2 = wxGraphicsRenderer::GetCairoRenderer();
-    if (r1 == r2)
-        return NULL;
-#endif
+    wxCHECK_MSG(gc->GetRenderer() == wxGraphicsRenderer::GetGDIPlusRenderer(), NULL,
+                "can't get HDC because this is not GDI+ context");
 
     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
     return g ? g->GetHDC() : NULL;
@@ -3033,13 +3029,8 @@ void wxGCDC::ReleaseHDC(WXHDC hdc)
     wxGraphicsContext * const gc = GetGraphicsContext();
     wxCHECK_RET( gc, "can't release HDC because there is no wxGraphicsContext" );
 
-#if wxUSE_CAIRO
-    // we can't get the HDC if it is not a GDI+ context
-    wxGraphicsRenderer* r1 = gc->GetRenderer();
-    wxGraphicsRenderer* r2 = wxGraphicsRenderer::GetCairoRenderer();
-    if (r1 == r2)
-        return;
-#endif
+    wxCHECK_RET(gc->GetRenderer() == wxGraphicsRenderer::GetGDIPlusRenderer(),
+                "can't release HDC because this is not GDI+ context");
 
     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
     wxCHECK_RET( g, "can't release HDC because there is no Graphics" );