DWriteTextRenderer.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
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 *
 * 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
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 */
 
#pragma once
 
#include <usp10.h>
#include <d2d1.h>
#include <dwrite.h>
 
#include <win/winlayout.hxx>
 
enum class D2DTextAntiAliasMode
{
    Default,
    Aliased,
    AntiAliased,
    ClearType,
};
 
class D2DWriteTextOutRenderer : public TextOutRenderer
{
public:
    explicit D2DWriteTextOutRenderer(bool bRenderingModeNatural);
    virtual ~D2DWriteTextOutRenderer() override;
 
    bool operator()(GenericSalLayout const &rLayout,
        SalGraphics &rGraphics,
        HDC hDC,
        bool bRenderingModeNatural) override;
 
    HRESULT BindDC(HDC hDC, tools::Rectangle const & rRect = tools::Rectangle(0, 0, 1, 1));
 
    HRESULT CreateRenderTarget(bool bRenderingModeNatural);
 
    bool Ready() const;
 
    void applyTextAntiAliasMode(bool bRenderingModeNatural);
 
    bool GetRenderingModeNatural() const { return mbRenderingModeNatural; }
 
private:
    // This is a singleton object disable copy ctor and assignment operator
    D2DWriteTextOutRenderer(const D2DWriteTextOutRenderer &) = delete;
    D2DWriteTextOutRenderer & operator = (const D2DWriteTextOutRenderer &) = delete;
 
    IDWriteFontFace* GetDWriteFace(const WinFontInstance& rWinFont, float * lfSize) const;
    bool performRender(GenericSalLayout const &rLayout, SalGraphics &rGraphics, HDC hDC, bool& bRetry, bool bRenderingModeNatural);
 
    ID2D1Factory        * mpD2DFactory;
    IDWriteFactory      * mpDWriteFactory;
    ID2D1DCRenderTarget * mpRT;
    const D2D1_RENDER_TARGET_PROPERTIES mRTProps;
 
    bool mbRenderingModeNatural;
    D2DTextAntiAliasMode meTextAntiAliasMode;
};
 
class WinFontTransformGuard
{
public:
    WinFontTransformGuard(ID2D1RenderTarget* pRenderTarget, float fHScale, const GenericSalLayout& rLayout, const D2D1_POINT_2F& rBaseline, bool bIsVertical);
    ~WinFontTransformGuard();
 
private:
    ID2D1RenderTarget* mpRenderTarget;
    D2D1::Matrix3x2F maTransform;
};
 
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