move most font handling out of CairoTextRender

It doesn't really have anything to do with Cairo, it's FreeType,
and it can be reused by other implementation (to be used by Skia).

Change-Id: I02fe8b9d8cd9334741240a1198460c41543cd876
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/90605
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

2 files changed, 74 insertions, 40 deletions

diff --git a/vcl/inc/unx/cairotextrender.hxx b/vcl/inc/unx/cairotextrender.hxx
index 6b29041b9360..3879bf5d975d 100644
--- a/vcl/inc/unx/cairotextrender.hxx
+++ b/vcl/inc/unx/cairotextrender.hxx
@@ -20,17 +20,12 @@
 #ifndef INCLUDED_VCL_INC_UNX_CAIROTEXTRENDER_HXX
 #define INCLUDED_VCL_INC_UNX_CAIROTEXTRENDER_HXX
 
-#include <textrender.hxx>
+#include <unx/freetypetextrender.hxx>
 
-class FreetypeFont;
 typedef struct _cairo cairo_t;
 
-class VCL_DLLPUBLIC CairoTextRender : public TextRenderImpl
+class VCL_DLLPUBLIC CairoTextRender : public FreeTypeTextRenderImpl
 {
-    FreetypeFont*   mpFreetypeFont[ MAX_FALLBACK ];
-
-    Color           mnTextColor;
-
 protected:
     virtual cairo_t*            getCairoContext() = 0;
     virtual void                getSurfaceOffset(double& nDX, double& nDY) = 0;
@@ -39,40 +34,7 @@ protected:
     virtual void                clipRegion(cairo_t* cr) = 0;
 
 public:
-                                CairoTextRender();
-    virtual ~CairoTextRender() override;
-
-    virtual void                SetTextColor( Color nColor ) override;
-    virtual void                SetFont(LogicalFontInstance*, int nFallbackLevel) override;
-    virtual void                GetFontMetric( ImplFontMetricDataRef&, int nFallbackLevel ) override;
-    virtual FontCharMapRef      GetFontCharMap() const override;
-    virtual bool                GetFontCapabilities(vcl::FontCapabilities &rFontCapabilities) const override;
-    virtual void                GetDevFontList( PhysicalFontCollection* ) override;
-    virtual void                ClearDevFontCache() override;
-    virtual bool                AddTempDevFont( PhysicalFontCollection*, const OUString& rFileURL, const OUString& rFontName ) override;
-    virtual bool                CreateFontSubset(
-                                    const OUString& rToFile,
-                                    const PhysicalFontFace*,
-                                    const sal_GlyphId* pGlyphIDs,
-                                    const sal_uInt8* pEncoding,
-                                    sal_Int32* pWidths,
-                                    int nGlyphs,
-                                    FontSubsetInfo& rInfo) override;
-
-    virtual const void*         GetEmbedFontData(const PhysicalFontFace*, long* pDataLen) override;
-    virtual void                FreeEmbedFontData( const void* pData, long nDataLen ) override;
-    virtual void                GetGlyphWidths(
-                                    const PhysicalFontFace*,
-                                    bool bVertical,
-                                    std::vector< sal_Int32 >& rWidths,
-                                    Ucs2UIntMap& rUnicodeEnc ) override;
-
-    virtual std::unique_ptr<GenericSalLayout>
-                                GetTextLayout(int nFallbackLevel) override;
     virtual void                DrawTextLayout(const GenericSalLayout&, const SalGraphics&) override;
-#if ENABLE_CAIRO_CANVAS
-    virtual SystemFontData      GetSysFontData( int nFallbackLevel ) const override;
-#endif
 };
 
 #endif
diff --git a/vcl/inc/unx/freetypetextrender.hxx b/vcl/inc/unx/freetypetextrender.hxx
new file mode 100644
index 000000000000..c4abba43dfdc
--- /dev/null
+++ b/vcl/inc/unx/freetypetextrender.hxx
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_UNX_FREETYPETEXTRENDER_HXX
+#define INCLUDED_VCL_INC_UNX_FREETYPETEXTRENDER_HXX
+
+#include <textrender.hxx>
+
+class FreetypeFont;
+
+// Generic implementation that uses freetype, but DrawTextLayout()
+// still needs implementing (e.g. by Cairo or Skia).
+class VCL_DLLPUBLIC FreeTypeTextRenderImpl : public TextRenderImpl
+{
+protected:
+    FreetypeFont*   mpFreetypeFont[ MAX_FALLBACK ];
+
+    Color           mnTextColor;
+
+public:
+    FreeTypeTextRenderImpl();
+    virtual ~FreeTypeTextRenderImpl() override;
+
+    virtual void                SetTextColor( Color nColor ) override;
+    virtual void                SetFont(LogicalFontInstance*, int nFallbackLevel) override;
+    virtual void                GetFontMetric( ImplFontMetricDataRef&, int nFallbackLevel ) override;
+    virtual FontCharMapRef      GetFontCharMap() const override;
+    virtual bool                GetFontCapabilities(vcl::FontCapabilities &rFontCapabilities) const override;
+    virtual void                GetDevFontList( PhysicalFontCollection* ) override;
+    virtual void                ClearDevFontCache() override;
+    virtual bool                AddTempDevFont( PhysicalFontCollection*, const OUString& rFileURL, const OUString& rFontName ) override;
+    virtual bool                CreateFontSubset(
+                                    const OUString& rToFile,
+                                    const PhysicalFontFace*,
+                                    const sal_GlyphId* pGlyphIDs,
+                                    const sal_uInt8* pEncoding,
+                                    sal_Int32* pWidths,
+                                    int nGlyphs,
+                                    FontSubsetInfo& rInfo) override;
+
+    virtual const void*         GetEmbedFontData(const PhysicalFontFace*, long* pDataLen) override;
+    virtual void                FreeEmbedFontData( const void* pData, long nDataLen ) override;
+    virtual void                GetGlyphWidths(
+                                    const PhysicalFontFace*,
+                                    bool bVertical,
+                                    std::vector< sal_Int32 >& rWidths,
+                                    Ucs2UIntMap& rUnicodeEnc ) override;
+
+    virtual std::unique_ptr<GenericSalLayout>
+                                GetTextLayout(int nFallbackLevel) override;
+    virtual SystemFontData      GetSysFontData( int nFallbackLevel ) const override;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */