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 #include <sal/config.h>
21 #include <config_features.h>
22
23 #include <memory>
24
25 #include <o3tl/safeint.hxx>
26 #include <osl/module.h>
27 #include <osl/file.h>
28 #include <sal/log.hxx>
29
30 #include <comphelper/scopeguard.hxx>
31
32 #include <win/salgdi.h>
33 #include <win/saldata.hxx>
34 #include <win/wingdiimpl.hxx>
35 #include <ImplOutDevData.hxx>
36
37 #include <win/DWriteTextRenderer.hxx>
38 #include <win/scoped_gdi.hxx>
39
40 #include <sallayout.hxx>
41
42 #include <cstdio>
43 #include <cstdlib>
44
45 #include <rtl/character.hxx>
46
47 #include <algorithm>
48
49 #include <shlwapi.h>
50 #include <winver.h>
51
get(bool bUseDWrite,bool bRenderingModeNatural,bool bAntiAlias)52 TextOutRenderer& TextOutRenderer::get(bool bUseDWrite, bool bRenderingModeNatural, bool bAntiAlias)
53 {
54 SalData* const pSalData = GetSalData();
55
56 if (!pSalData)
57 { // don't call this after DeInitVCL()
58 fprintf(stderr, "TextOutRenderer fatal error: no SalData");
59 abort();
60 }
61
62 if (bUseDWrite)
63 {
64 const auto mode = D2DWriteTextOutRenderer::GetMode(bRenderingModeNatural, bAntiAlias);
65 if (pSalData->m_pD2DWriteTextOutRenderer)
66 {
67 auto pRenderer
68 = static_cast<D2DWriteTextOutRenderer*>(pSalData->m_pD2DWriteTextOutRenderer.get());
69 if (pRenderer->GetRenderingMode() == mode)
70 return *pSalData->m_pD2DWriteTextOutRenderer;
71 }
72
73 pSalData->m_pD2DWriteTextOutRenderer.reset(new D2DWriteTextOutRenderer(mode));
74 return *pSalData->m_pD2DWriteTextOutRenderer;
75 }
76 if (!pSalData->m_pExTextOutRenderer)
77 {
78 pSalData->m_pExTextOutRenderer.reset(new ExTextOutRenderer);
79 }
80 return *pSalData->m_pExTextOutRenderer;
81 }
82
operator ()(GenericSalLayout const & rLayout,SalGraphics &,HDC hDC)83 bool ExTextOutRenderer::operator()(GenericSalLayout const& rLayout, SalGraphics& /*rGraphics*/,
84 HDC hDC)
85 {
86 int nStart = 0;
87 basegfx::B2DPoint aPos;
88 const GlyphItem* pGlyph;
89 const WinFontInstance* pWinFont = static_cast<const WinFontInstance*>(&rLayout.GetFont());
90
91 bool bVertFontSelected = false;
92 auto fnUseVertFont = [&](bool bValue) {
93 if (bVertFontSelected != bValue)
94 {
95 bVertFontSelected = bValue;
96 SelectFont(hDC,
97 bVertFontSelected ? pWinFont->GetVerticalHFONT() : pWinFont->GetHFONT());
98 }
99 };
100
101 while (rLayout.GetNextGlyph(&pGlyph, aPos, nStart))
102 {
103 wchar_t glyphWStr = pGlyph->glyphId();
104
105 fnUseVertFont(pWinFont->IsCJKVerticalFont() && pGlyph->IsVertical());
106
107 ExtTextOutW(hDC, aPos.getX(), aPos.getY(), ETO_GLYPH_INDEX, nullptr, &glyphWStr, 1,
108 nullptr);
109 }
110
111 return true;
112 }
113
GetTextLayout(int nFallbackLevel)114 std::unique_ptr<GenericSalLayout> WinSalGraphics::GetTextLayout(int nFallbackLevel)
115 {
116 assert(mpWinFontEntry[nFallbackLevel]);
117 if (!mpWinFontEntry[nFallbackLevel])
118 return nullptr;
119
120 assert(mpWinFontEntry[nFallbackLevel]->GetFontFace());
121
122 mpWinFontEntry[nFallbackLevel]->SetGraphics(this);
123 return std::make_unique<GenericSalLayout>(*mpWinFontEntry[nFallbackLevel]);
124 }
125
WinFontInstance(const WinFontFace & rPFF,const vcl::font::FontSelectPattern & rFSP)126 WinFontInstance::WinFontInstance(const WinFontFace& rPFF, const vcl::font::FontSelectPattern& rFSP)
127 : LogicalFontInstance(rPFF, rFSP)
128 , m_pGraphics(nullptr)
129 , m_hFont(nullptr)
130 , m_hVerticalFont(nullptr)
131 , m_nTmDescent(0)
132 {
133 }
134
~WinFontInstance()135 WinFontInstance::~WinFontInstance()
136 {
137 if (m_hFont)
138 ::DeleteFont(m_hFont);
139
140 if (m_hVerticalFont)
141 ::DeleteFont(m_hVerticalFont);
142 }
143
getHScale() const144 float WinFontInstance::getHScale() const
145 {
146 const vcl::font::FontSelectPattern& rPattern = GetFontSelectPattern();
147 if (!rPattern.mnHeight || !rPattern.mnWidth)
148 return 1.0;
149 return rPattern.mnWidth * GetAverageWidthFactor() / rPattern.mnHeight;
150 }
151
ImplInitHbFont(hb_font_t *)152 void WinFontInstance::ImplInitHbFont(hb_font_t* /*pHbFont*/)
153 {
154 assert(m_pGraphics);
155 // Calculate the AverageWidthFactor, see LogicalFontInstance::GetScale().
156 if (!GetFontSelectPattern().mnWidth)
157 return;
158
159 double nUPEM = GetFontFace()->UnitsPerEm();
160
161 LOGFONTW aLogFont;
162 GetObjectW(m_hFont, sizeof(LOGFONTW), &aLogFont);
163
164 // Set the height (font size) to EM to minimize rounding errors.
165 aLogFont.lfHeight = -nUPEM;
166 // Set width to the default to get the original value in the metrics.
167 aLogFont.lfWidth = 0;
168
169 TEXTMETRICW aFontMetric;
170 {
171 // Get the font metrics.
172 HDC hDC = m_pGraphics->getHDC();
173 ScopedSelectedHFONT hFont(hDC, CreateFontIndirectW(&aLogFont));
174 GetTextMetricsW(hDC, &aFontMetric);
175 }
176
177 SetAverageWidthFactor(nUPEM / aFontMetric.tmAveCharWidth);
178 }
179
SetGraphics(WinSalGraphics * pGraphics)180 void WinFontInstance::SetGraphics(WinSalGraphics* pGraphics)
181 {
182 m_pGraphics = pGraphics;
183 if (m_hFont)
184 return;
185 HFONT hOrigFont;
186 HDC hDC = m_pGraphics->getHDC();
187 std::tie(m_hFont, m_hVerticalFont, m_nTmDescent)
188 = m_pGraphics->ImplDoSetFont(hDC, GetFontSelectPattern(), GetFontFace(), hOrigFont);
189 SelectObject(hDC, hOrigFont);
190 }
191
DrawTextLayout(const GenericSalLayout & rLayout,HDC hDC,bool bUseDWrite,bool bRenderingModeNatural)192 void WinSalGraphics::DrawTextLayout(const GenericSalLayout& rLayout, HDC hDC, bool bUseDWrite,
193 bool bRenderingModeNatural)
194 {
195 auto& render = TextOutRenderer::get(bUseDWrite, bRenderingModeNatural, getAntiAlias());
196 render(rLayout, *this, hDC);
197 }
198
DrawTextLayout(const GenericSalLayout & rLayout)199 void WinSalGraphics::DrawTextLayout(const GenericSalLayout& rLayout)
200 {
201 if (!mbPrinter && mWinSalGraphicsImplBase->DrawTextLayout(rLayout))
202 return; // handled by mWinSalGraphicsImplBase
203
204 HDC hDC = getHDC();
205 const WinFontInstance* pWinFont = static_cast<const WinFontInstance*>(&rLayout.GetFont());
206 const HFONT hLayoutFont = pWinFont->GetHFONT();
207
208 const HFONT hOrigFont = ::SelectFont(hDC, hLayoutFont);
209
210 // DWrite text renderer performs vertical writing better except printing.
211 const bool bVerticalScreenText
212 = !mbPrinter && rLayout.GetFont().GetFontSelectPattern().mbVertical;
213 const bool bRenderingModeNatural = rLayout.GetSubpixelPositioning();
214 const bool bUseDWrite = bVerticalScreenText || bRenderingModeNatural;
215 DrawTextLayout(rLayout, hDC, bUseDWrite, bRenderingModeNatural);
216
217 ::SelectFont(hDC, hOrigFont);
218 }
219
220 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
221
