summaryrefslogtreecommitdiff
path: root/vcl/inc/win/winlayout.hxx
blob: e070ef5a724912003ed089d7050d425c76f42693 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
/* -*- 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_WIN_WINLAYOUT_HXX
#define INCLUDED_VCL_INC_WIN_WINLAYOUT_HXX

#include <rtl/ustring.hxx>

#include <sallayout.hxx>
#include <svsys.h>
#include <win/salgdi.h>

#include <usp10.h>
#include <d2d1.h>
#include <dwrite.h>

#include "opengl/PackedTextureAtlas.hxx"

class WinFontInstance;

namespace
{
// Extra space at the top and bottom of the glyph in total = tmHeight / GLYPH_SPACE_RATIO;
const int GLYPH_SPACE_RATIO = 8;
// Border size at the top of the glyph = tmHeight / GLYPH_OFFSET_RATIO;
const int GLYPH_OFFSET_RATIO = GLYPH_SPACE_RATIO * 2;
}

struct OpenGLGlyphDrawElement
{
    tools::Rectangle maLocation;
    int maLeftOverhangs;
    OpenGLTexture maTexture;
    int mnBaselineOffset;
    int mnHeight;
    bool mbVertical;

    int getExtraSpace() const
    {
        return std::max(mnHeight / GLYPH_SPACE_RATIO, 4);
    }

    int getExtraOffset() const
    {
        return std::max(mnHeight / GLYPH_OFFSET_RATIO, 2);
    }
};

class GlyphCache;

struct GlobalGlyphCache
{
    GlobalGlyphCache()
        : maPackedTextureAtlas(2048, 2048)
    {}

    PackedTextureAtlasManager maPackedTextureAtlas;
    std::unordered_set<GlyphCache*> maGlyphCaches;

    static GlobalGlyphCache * get();
};

class GlyphCache
{
private:
    std::unordered_map<int, OpenGLGlyphDrawElement> maOpenGLTextureCache;

public:
    GlyphCache()
    {
        GlobalGlyphCache::get()->maGlyphCaches.insert(this);
    }

    ~GlyphCache()
    {
        GlobalGlyphCache::get()->maGlyphCaches.erase(this);
    }

    static bool ReserveTextureSpace(OpenGLGlyphDrawElement& rElement, int nWidth, int nHeight)
    {
        GlobalGlyphCache* pGlobalGlyphCache = GlobalGlyphCache::get();
        rElement.maTexture = pGlobalGlyphCache->maPackedTextureAtlas.Reserve(nWidth, nHeight);
        if (!rElement.maTexture)
            return false;
        std::vector<GLuint> aTextureIDs = pGlobalGlyphCache->maPackedTextureAtlas.ReduceTextureNumber(8);
        if (!aTextureIDs.empty())
        {
            for (auto& pGlyphCache: pGlobalGlyphCache->maGlyphCaches)
            {
                pGlyphCache->RemoveTextures(aTextureIDs);
            }
        }
        return true;
    }

    void RemoveTextures(std::vector<GLuint>& rTextureIDs)
    {
        auto it = maOpenGLTextureCache.begin();

        while (it != maOpenGLTextureCache.end())
        {
            GLuint nTextureID = it->second.maTexture.Id();

            if (std::find(rTextureIDs.begin(), rTextureIDs.end(), nTextureID) != rTextureIDs.end())
            {
                it = maOpenGLTextureCache.erase(it);
            }
            else
            {
                ++it;
            }
        }
    }

    void PutDrawElementInCache(const OpenGLGlyphDrawElement& rElement, int nGlyphIndex)
    {
        assert(!IsGlyphCached(nGlyphIndex));
        maOpenGLTextureCache[nGlyphIndex] = OpenGLGlyphDrawElement(rElement);
    }

    OpenGLGlyphDrawElement& GetDrawElement(int nGlyphIndex)
    {
        assert(IsGlyphCached(nGlyphIndex));
        return maOpenGLTextureCache[nGlyphIndex];
    }

    bool IsGlyphCached(int nGlyphIndex) const
    {
        return maOpenGLTextureCache.find(nGlyphIndex) != maOpenGLTextureCache.end();
    }
};

// win32 specific physical font instance
class WinFontInstance : public LogicalFontInstance
{
public:
    explicit                WinFontInstance( FontSelectPattern& );
    virtual                 ~WinFontInstance() override;

private:
    // TODO: also add HFONT??? Watch out for issues with too many active fonts...

    GlyphCache maGlyphCache;
public:
    bool CacheGlyphToAtlas(HDC hDC, HFONT hFont, int nGlyphIndex, SalGraphics& rGraphics);

    GlyphCache& GetGlyphCache()
    {
        return maGlyphCache;
    }
};

class TextOutRenderer
{
protected:
    explicit TextOutRenderer() = default;
    TextOutRenderer(const TextOutRenderer &) = delete;
    TextOutRenderer & operator = (const TextOutRenderer &) = delete;

public:
    static TextOutRenderer & get(bool bUseDWrite);

    virtual ~TextOutRenderer() = default;

    virtual bool operator ()(CommonSalLayout const &rLayout,
        SalGraphics &rGraphics,
        HDC hDC) = 0;
};

class ExTextOutRenderer : public TextOutRenderer
{
    ExTextOutRenderer(const ExTextOutRenderer &) = delete;
    ExTextOutRenderer & operator = (const ExTextOutRenderer &) = delete;

public:
    explicit ExTextOutRenderer() = default;

    bool operator ()(CommonSalLayout const &rLayout,
        SalGraphics &rGraphics,
        HDC hDC) override;
};

enum class D2DTextAntiAliasMode
{
    Default,
    Aliased,
    AntiAliased,
    ClearType,
};

class D2DWriteTextOutRenderer : public TextOutRenderer
{
    typedef HRESULT(WINAPI *pD2D1CreateFactory_t)(D2D1_FACTORY_TYPE,
        REFIID, const D2D1_FACTORY_OPTIONS *, void **);

    typedef HRESULT(WINAPI *pDWriteCreateFactory_t)(DWRITE_FACTORY_TYPE,
        REFIID, IUnknown **);

    static HINSTANCE mmD2d1, mmDWrite;
    static pD2D1CreateFactory_t     D2D1CreateFactory;
    static pDWriteCreateFactory_t   DWriteCreateFactory;

public:
    static bool InitModules();

    explicit D2DWriteTextOutRenderer();
    virtual ~D2DWriteTextOutRenderer() override;

    bool operator ()(CommonSalLayout const &rLayout,
        SalGraphics &rGraphics,
        HDC hDC) override;

    HRESULT BindDC(HDC hDC, tools::Rectangle const & rRect = tools::Rectangle(0, 0, 1, 1));

    bool BindFont(HDC hDC) /*override*/;
    bool ReleaseFont() /*override*/;

    std::vector<tools::Rectangle>  GetGlyphInkBoxes(uint16_t * pGid, uint16_t * pGidEnd) const /*override*/;
    ID2D1RenderTarget * GetRenderTarget() const { return mpRT; }
    IDWriteFontFace   * GetFontFace() const { return mpFontFace; }
    float               GetEmHeight() const { return mlfEmHeight; }

    HRESULT CreateRenderTarget();

    bool Ready() const { return mpGdiInterop && mpRT; }

    void applyTextAntiAliasMode();
    void changeTextAntiAliasMode(D2DTextAntiAliasMode eMode);

private:
    static void CleanupModules();

    // This is a singleton object disable copy ctor and assignment operator
    D2DWriteTextOutRenderer(const D2DWriteTextOutRenderer &) = delete;
    D2DWriteTextOutRenderer & operator = (const D2DWriteTextOutRenderer &) = delete;

    bool GetDWriteFaceFromHDC(HDC hDC, IDWriteFontFace ** ppFontFace, float * lfSize) const;
    bool performRender(CommonSalLayout const &rLayout, SalGraphics &rGraphics, HDC hDC, bool& bRetry);

    ID2D1Factory        * mpD2DFactory;
    IDWriteFactory      * mpDWriteFactory;
    IDWriteGdiInterop   * mpGdiInterop;
    ID2D1DCRenderTarget * mpRT;
    const D2D1_RENDER_TARGET_PROPERTIES mRTProps;

    IDWriteFontFace * mpFontFace;
    float             mlfEmHeight;
    HDC               mhDC;
    D2DTextAntiAliasMode meTextAntiAliasMode;
    IDWriteRenderingParams* mpRenderingParameters;
};

#endif // INCLUDED_VCL_INC_WIN_WINLAYOUT_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */