vcl/inc/win/DWriteTextRenderer.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_INC_WIN_DWRITERENDERER_HXX
  21 #define INCLUDED_VCL_INC_WIN_DWRITERENDERER_HXX
  22
  23 #include <usp10.h>
  24 #include <d2d1.h>
  25 #include <dwrite.h>
  26
  27 #include <win/winlayout.hxx>
  28
  29 enum class D2DTextAntiAliasMode
  30 {
  31     Default,
  32     Aliased,
  33     AntiAliased,
  34     ClearType,
  35 };
  36
  37 class D2DWriteTextOutRenderer : public TextOutRenderer
  38 {
  39 public:
  40     explicit D2DWriteTextOutRenderer();
  41     virtual ~D2DWriteTextOutRenderer() override;
  42
  43     bool operator ()(GenericSalLayout const &rLayout,
  44         SalGraphics &rGraphics,
  45         HDC hDC) override;
  46
  47     HRESULT BindDC(HDC hDC, tools::Rectangle const & rRect = tools::Rectangle(0, 0, 1, 1));
  48
  49     bool BindFont(HDC hDC) /*override*/;
  50     bool ReleaseFont() /*override*/;
  51
  52     std::vector<tools::Rectangle>  GetGlyphInkBoxes(uint16_t const * pGid, uint16_t const * pGidEnd) const /*override*/;
  53     ID2D1RenderTarget * GetRenderTarget() const { return mpRT; }
  54     IDWriteFontFace   * GetFontFace() const { return mpFontFace; }
  55     float               GetEmHeight() const { return mlfEmHeight; }
  56
  57     HRESULT CreateRenderTarget();
  58
  59     bool Ready() const;
  60
  61     void applyTextAntiAliasMode();
  62     void changeTextAntiAliasMode(D2DTextAntiAliasMode eMode);
  63
  64 private:
  65     // This is a singleton object disable copy ctor and assignment operator
  66     D2DWriteTextOutRenderer(const D2DWriteTextOutRenderer &) = delete;
  67     D2DWriteTextOutRenderer & operator = (const D2DWriteTextOutRenderer &) = delete;
  68
  69     bool GetDWriteFaceFromHDC(HDC hDC, IDWriteFontFace ** ppFontFace, float * lfSize) const;
  70     bool performRender(GenericSalLayout const &rLayout, SalGraphics &rGraphics, HDC hDC, bool& bRetry);
  71
  72     ID2D1Factory        * mpD2DFactory;
  73     IDWriteFactory      * mpDWriteFactory;
  74     IDWriteGdiInterop   * mpGdiInterop;
  75     ID2D1DCRenderTarget * mpRT;
  76     const D2D1_RENDER_TARGET_PROPERTIES mRTProps;
  77
  78     IDWriteFontFace * mpFontFace;
  79     float             mlfEmHeight;
  80     HDC               mhDC;
  81     D2DTextAntiAliasMode meTextAntiAliasMode;
  82 };
  83
  84 /**
  85  * Sets and unsets the needed DirectWrite transform to support the font's horizontal scaling and
  86  * rotation.
  87  */
  88 class WinFontTransformGuard
  89 {
  90 public:
  91     WinFontTransformGuard(ID2D1RenderTarget* pRenderTarget, float fHScale, const GenericSalLayout& rLayout, const D2D1_POINT_2F& rBaseline, bool bIsVertical);
  92     ~WinFontTransformGuard();
  93
  94 private:
  95     ID2D1RenderTarget* mpRenderTarget;
  96     D2D1::Matrix3x2F maTransform;
  97 };
  98
  99 #endif // INCLUDED_VCL_INC_WIN_DWRITERENDERER_HXX
 100
 101 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */