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/* -*- 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 .
*/
#include <sal/config.h>
#include <config_features.h>
#include <memory>
#include <o3tl/safeint.hxx>
#include <osl/module.h>
#include <osl/file.h>
#include <sal/log.hxx>
#include <comphelper/windowserrorstring.hxx>
#include <comphelper/scopeguard.hxx>
#include <win/salgdi.h>
#include <win/saldata.hxx>
#include <win/wingdiimpl.hxx>
#include <ImplOutDevData.hxx>
#include <win/DWriteTextRenderer.hxx>
#include <win/scoped_gdi.hxx>
#include <sallayout.hxx>
#include <cstdio>
#include <cstdlib>
#include <rtl/character.hxx>
#include <algorithm>
#include <shlwapi.h>
#include <winver.h>
TextOutRenderer& TextOutRenderer::get(bool bUseDWrite, bool bRenderingModeNatural, bool bAntiAlias)
{
SalData* const pSalData = GetSalData();
if (!pSalData)
{ // don't call this after DeInitVCL()
fprintf(stderr, "TextOutRenderer fatal error: no SalData");
abort();
}
if (bUseDWrite)
{
const auto mode = D2DWriteTextOutRenderer::GetMode(bRenderingModeNatural, bAntiAlias);
if (pSalData->m_pD2DWriteTextOutRenderer)
{
auto pRenderer
= static_cast<D2DWriteTextOutRenderer*>(pSalData->m_pD2DWriteTextOutRenderer.get());
if (pRenderer->GetRenderingMode() == mode)
return *pSalData->m_pD2DWriteTextOutRenderer;
}
pSalData->m_pD2DWriteTextOutRenderer.reset(new D2DWriteTextOutRenderer(mode));
return *pSalData->m_pD2DWriteTextOutRenderer;
}
if (!pSalData->m_pExTextOutRenderer)
{
pSalData->m_pExTextOutRenderer.reset(new ExTextOutRenderer);
}
return *pSalData->m_pExTextOutRenderer;
}
bool ExTextOutRenderer::operator()(GenericSalLayout const& rLayout, SalGraphics& /*rGraphics*/,
HDC hDC)
{
int nStart = 0;
basegfx::B2DPoint aPos;
const GlyphItem* pGlyph;
const WinFontInstance* pWinFont = static_cast<const WinFontInstance*>(&rLayout.GetFont());
UINT nTextAlign = GetTextAlign(hDC);
UINT nCurTextAlign = nTextAlign;
sal_Int32 nGlyphOffset = -pWinFont->GetTmDescent();
while (rLayout.GetNextGlyph(&pGlyph, aPos, nStart))
{
wchar_t glyphWStr = pGlyph->glyphId();
UINT32 nNewTextAlign = nCurTextAlign;
sal_Int32 nYOffset = 0;
if (pWinFont->IsCJKVerticalFont() && pGlyph->IsVertical())
{
nNewTextAlign = VTA_CENTER | TA_BOTTOM;
nYOffset = nGlyphOffset;
}
else
nNewTextAlign = nTextAlign;
if (nCurTextAlign != nNewTextAlign)
SetTextAlign(hDC, nNewTextAlign);
ExtTextOutW(hDC, aPos.getX(), aPos.getY() + nYOffset, ETO_GLYPH_INDEX, nullptr, &glyphWStr,
1, nullptr);
nCurTextAlign = nNewTextAlign;
}
if (nCurTextAlign != nTextAlign)
SetTextAlign(hDC, nTextAlign);
return true;
}
std::unique_ptr<GenericSalLayout> WinSalGraphics::GetTextLayout(int nFallbackLevel)
{
assert(mpWinFontEntry[nFallbackLevel]);
if (!mpWinFontEntry[nFallbackLevel])
return nullptr;
assert(mpWinFontEntry[nFallbackLevel]->GetFontFace());
mpWinFontEntry[nFallbackLevel]->SetGraphics(this);
return std::make_unique<GenericSalLayout>(*mpWinFontEntry[nFallbackLevel]);
}
WinFontInstance::WinFontInstance(const WinFontFace& rPFF, const vcl::font::FontSelectPattern& rFSP)
: LogicalFontInstance(rPFF, rFSP)
, m_pGraphics(nullptr)
, m_hFont(nullptr)
, m_bIsCJKVerticalFont(false)
, m_nTmDescent(0)
{
}
WinFontInstance::~WinFontInstance()
{
if (m_hFont)
::DeleteFont(m_hFont);
}
float WinFontInstance::getHScale() const
{
const vcl::font::FontSelectPattern& rPattern = GetFontSelectPattern();
if (!rPattern.mnHeight || !rPattern.mnWidth)
return 1.0;
return rPattern.mnWidth * GetAverageWidthFactor() / rPattern.mnHeight;
}
void WinFontInstance::ImplInitHbFont(hb_font_t* /*pHbFont*/)
{
assert(m_pGraphics);
// Calculate the AverageWidthFactor, see LogicalFontInstance::GetScale().
if (GetFontSelectPattern().mnWidth)
{
double nUPEM = GetFontFace()->UnitsPerEm();
LOGFONTW aLogFont;
GetObjectW(m_hFont, sizeof(LOGFONTW), &aLogFont);
// Set the height (font size) to EM to minimize rounding errors.
aLogFont.lfHeight = -nUPEM;
// Set width to the default to get the original value in the metrics.
aLogFont.lfWidth = 0;
TEXTMETRICW aFontMetric;
{
// Get the font metrics.
HDC hDC = m_pGraphics->getHDC();
ScopedSelectedHFONT hFont(hDC, CreateFontIndirectW(&aLogFont));
GetTextMetricsW(hDC, &aFontMetric);
}
SetAverageWidthFactor(nUPEM / aFontMetric.tmAveCharWidth);
}
}
void WinFontInstance::SetGraphics(WinSalGraphics* pGraphics)
{
m_pGraphics = pGraphics;
if (m_hFont)
return;
HFONT hOrigFont;
HDC hDC = m_pGraphics->getHDC();
std::tie(m_hFont, m_bIsCJKVerticalFont, m_nTmDescent)
= m_pGraphics->ImplDoSetFont(hDC, GetFontSelectPattern(), GetFontFace(), hOrigFont);
SelectObject(hDC, hOrigFont);
}
void WinSalGraphics::DrawTextLayout(const GenericSalLayout& rLayout, HDC hDC, bool bUseDWrite,
bool bRenderingModeNatural)
{
auto& render = TextOutRenderer::get(bUseDWrite, bRenderingModeNatural, getAntiAlias());
render(rLayout, *this, hDC);
}
void WinSalGraphics::DrawTextLayout(const GenericSalLayout& rLayout)
{
if (!mbPrinter && mWinSalGraphicsImplBase->DrawTextLayout(rLayout))
return; // handled by mWinSalGraphicsImplBase
HDC hDC = getHDC();
const WinFontInstance* pWinFont = static_cast<const WinFontInstance*>(&rLayout.GetFont());
const HFONT hLayoutFont = pWinFont->GetHFONT();
const HFONT hOrigFont = ::SelectFont(hDC, hLayoutFont);
// DWrite text renderer performs vertical writing better except printing.
const bool bVerticalScreenText
= !mbPrinter && rLayout.GetFont().GetFontSelectPattern().mbVertical;
const bool bRenderingModeNatural = rLayout.GetSubpixelPositioning();
const bool bUseDWrite = bVerticalScreenText || bRenderingModeNatural;
DrawTextLayout(rLayout, hDC, bUseDWrite, bRenderingModeNatural);
::SelectFont(hDC, hOrigFont);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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