vcl cairo text renderer: support non-AA text

Non-AA lines were already working, but text was always anti-aliased.

(Use-case is reference bitmaps in a testsuite, where AA just makes it
harder to determine if the expected and actual rendering output match.)

Change-Id: I7c5ab4c80675e1a523d67b71f3cd3cbc9c6416c3
Reviewed-on: https://gerrit.libreoffice.org/58035Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins

vcl/headless/svptext.cxx

@@ -108,7 +108,7 @@ std::unique_ptr<SalLayout> SvpSalGraphics::GetTextLayout( ImplLayoutArgs& rArgs,
 
 void SvpSalGraphics::DrawTextLayout(const GenericSalLayout& rLayout)
 {
-    m_aTextRenderImpl.DrawTextLayout(rLayout);
+    m_aTextRenderImpl.DrawTextLayout(rLayout, *this);
 }
 
 void SvpSalGraphics::SetTextColor( Color nColor )

vcl/inc/textrender.hxx

@@ -63,7 +63,7 @@ public:
     virtual bool                    GetGlyphOutline(const GlyphItem&, basegfx::B2DPolyPolygon&) = 0;
     virtual std::unique_ptr<SalLayout>
                                     GetTextLayout( ImplLayoutArgs&, int nFallbackLevel ) = 0;
-    virtual void                    DrawTextLayout(const GenericSalLayout&) = 0;
+    virtual void                    DrawTextLayout(const GenericSalLayout&, const SalGraphics&) = 0;
 #if ENABLE_CAIRO_CANVAS
     virtual SystemFontData          GetSysFontData( int nFallbackLevel ) const = 0;
 #endif // ENABLE_CAIRO_CANVAS

vcl/inc/unx/cairotextrender.hxx

@@ -79,7 +79,7 @@ public:
     virtual bool                GetGlyphOutline(const GlyphItem&, basegfx::B2DPolyPolygon&) override;
     virtual std::unique_ptr<SalLayout>
                                 GetTextLayout( ImplLayoutArgs&, int nFallbackLevel ) override;
-    virtual void                DrawTextLayout(const GenericSalLayout&) override;
+    virtual void                DrawTextLayout(const GenericSalLayout&, const SalGraphics&) override;
 #if ENABLE_CAIRO_CANVAS
     virtual SystemFontData      GetSysFontData( int nFallbackLevel ) const override;
 #endif

vcl/unx/generic/gdi/cairotextrender.cxx

@@ -168,7 +168,7 @@ namespace
     }
 }
 
-void CairoTextRender::DrawTextLayout(const GenericSalLayout& rLayout)
+void CairoTextRender::DrawTextLayout(const GenericSalLayout& rLayout, const SalGraphics& rGraphics)
 {
     const FreetypeFontInstance& rInstance = static_cast<FreetypeFontInstance&>(rLayout.GetFont());
     const FreetypeFont& rFont = *rInstance.GetFreetypeFont();
@@ -218,7 +218,17 @@ void CairoTextRender::DrawTextLayout(const GenericSalLayout& rLayout)
 
     ImplSVData* pSVData = ImplGetSVData();
     if (const cairo_font_options_t* pFontOptions = pSVData->mpDefInst->GetCairoFontOptions())
-        cairo_set_font_options(cr, pFontOptions);
+    {
+        if (!rGraphics.getAntiAliasB2DDraw())
+        {
+            cairo_font_options_t* pOptions = cairo_font_options_copy(pFontOptions);
+            cairo_font_options_set_antialias(pOptions, CAIRO_ANTIALIAS_NONE);
+            cairo_set_font_options(cr, pOptions);
+            cairo_font_options_destroy(pOptions);
+        }
+        else
+            cairo_set_font_options(cr, pFontOptions);
+    }
 
     double nDX, nDY;
     getSurfaceOffset(nDX, nDY);

vcl/unx/generic/gdi/font.cxx

@@ -55,7 +55,7 @@ X11SalGraphics::GetFontGC()
 
 void X11SalGraphics::DrawTextLayout(const GenericSalLayout& rLayout)
 {
-    mxTextRenderImpl->DrawTextLayout(rLayout);
+    mxTextRenderImpl->DrawTextLayout(rLayout, *this);
 }
 
 const FontCharMapRef X11SalGraphics::GetFontCharMap() const