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Diffstat (limited to '')
| -rw-r--r-- | vcl/win/gdi/winlayout.cxx | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/vcl/win/gdi/winlayout.cxx b/vcl/win/gdi/winlayout.cxx new file mode 100644 index 000000000..8371c9577 --- /dev/null +++ b/vcl/win/gdi/winlayout.cxx @@ -0,0 +1,330 @@ +/* -*- 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 <sft.hxx> +#include <sallayout.hxx> + +#include <cstdio> +#include <cstdlib> + +#include <rtl/character.hxx> + +#include <o3tl/hash_combine.hxx> +#include <algorithm> + +#include <shlwapi.h> +#include <winver.h> + +TextOutRenderer& TextOutRenderer::get(bool bUseDWrite, bool bRenderingModeNatural) +{ + SalData* const pSalData = GetSalData(); + + if (!pSalData) + { // don't call this after DeInitVCL() + fprintf(stderr, "TextOutRenderer fatal error: no SalData"); + abort(); + } + + if (bUseDWrite) + { + if (!pSalData->m_pD2DWriteTextOutRenderer + || static_cast<D2DWriteTextOutRenderer*>(pSalData->m_pD2DWriteTextOutRenderer.get()) + ->GetRenderingModeNatural() + != bRenderingModeNatural) + { + pSalData->m_pD2DWriteTextOutRenderer.reset( + new D2DWriteTextOutRenderer(bRenderingModeNatural)); + } + 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, bool /*bRenderingModeNatural*/) +{ + int nStart = 0; + DevicePoint 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_fScale(1.0f) + , m_bIsCJKVerticalFont(false) + , m_nTmDescent(0) +{ +} + +WinFontInstance::~WinFontInstance() +{ + if (m_hFont) + ::DeleteFont(m_hFont); +} + +bool WinFontInstance::hasHScale() const +{ + const vcl::font::FontSelectPattern& rPattern = GetFontSelectPattern(); + int nHeight(rPattern.mnHeight); + int nWidth(rPattern.mnWidth ? rPattern.mnWidth * GetAverageWidthFactor() : nHeight); + return nWidth != nHeight; +} + +float WinFontInstance::getHScale() const +{ + const vcl::font::FontSelectPattern& rPattern = GetFontSelectPattern(); + int nHeight(rPattern.mnHeight); + if (!nHeight) + return 1.0; + float nWidth(rPattern.mnWidth ? rPattern.mnWidth * GetAverageWidthFactor() : nHeight); + return nWidth / nHeight; +} + +namespace +{ +struct BlobReference +{ + hb_blob_t* mpBlob; + BlobReference(hb_blob_t* pBlob) + : mpBlob(pBlob) + { + hb_blob_reference(mpBlob); + } + BlobReference(BlobReference&& other) noexcept + : mpBlob(other.mpBlob) + { + other.mpBlob = nullptr; + } + BlobReference& operator=(BlobReference&& other) + { + std::swap(mpBlob, other.mpBlob); + return *this; + } + BlobReference(const BlobReference& other) = delete; + BlobReference& operator=(BlobReference& other) = delete; + ~BlobReference() { hb_blob_destroy(mpBlob); } +}; +} + +using BlobCacheKey = std::pair<rtl::Reference<vcl::font::PhysicalFontFace>, hb_tag_t>; + +namespace +{ +struct BlobCacheKeyHash +{ + std::size_t operator()(BlobCacheKey const& rKey) const + { + std::size_t seed = 0; + o3tl::hash_combine(seed, rKey.first.get()); + o3tl::hash_combine(seed, rKey.second); + return seed; + } +}; +} + +static hb_blob_t* getFontTable(hb_face_t* /*face*/, hb_tag_t nTableTag, void* pUserData) +{ + static o3tl::lru_map<BlobCacheKey, BlobReference, BlobCacheKeyHash> gCache(50); + + WinFontInstance* pFont = static_cast<WinFontInstance*>(pUserData); + + BlobCacheKey cacheKey{ rtl::Reference<vcl::font::PhysicalFontFace>(pFont->GetFontFace()), + nTableTag }; + auto it = gCache.find(cacheKey); + if (it != gCache.end()) + { + hb_blob_reference(it->second.mpBlob); + return it->second.mpBlob; + } + + HDC hDC = pFont->GetGraphics()->getHDC(); + HFONT hFont = pFont->GetHFONT(); + assert(hDC); + assert(hFont); + + sal_uLong nLength = 0; + unsigned char* pBuffer = nullptr; + + HGDIOBJ hOrigFont = SelectObject(hDC, hFont); + nLength = ::GetFontData(hDC, OSL_NETDWORD(nTableTag), 0, nullptr, 0); + if (nLength > 0 && nLength != GDI_ERROR) + { + pBuffer = new unsigned char[nLength]; + ::GetFontData(hDC, OSL_NETDWORD(nTableTag), 0, pBuffer, nLength); + } + SelectObject(hDC, hOrigFont); + + if (!pBuffer) + { // Cache also failures. + gCache.insert({ cacheKey, BlobReference(nullptr) }); + return nullptr; + } + + hb_blob_t* pBlob + = hb_blob_create(reinterpret_cast<const char*>(pBuffer), nLength, HB_MEMORY_MODE_READONLY, + pBuffer, [](void* data) { delete[] static_cast<unsigned char*>(data); }); + gCache.insert({ cacheKey, BlobReference(pBlob) }); + return pBlob; +} + +hb_font_t* WinFontInstance::ImplInitHbFont() +{ + assert(m_pGraphics); + hb_font_t* pHbFont = InitHbFont(hb_face_create_for_tables(getFontTable, this, nullptr)); + + // Calculate the AverageWidthFactor, see LogicalFontInstance::GetScale(). + if (GetFontSelectPattern().mnWidth) + { + double nUPEM = hb_face_get_upem(hb_font_get_face(pHbFont)); + + 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); + } + + return pHbFont; +} + +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) +{ + TextOutRenderer& render = TextOutRenderer::get(bUseDWrite, bRenderingModeNatural); + render(rLayout, *this, hDC, bRenderingModeNatural); +} + +void WinSalGraphics::DrawTextLayout(const GenericSalLayout& rLayout) +{ + WinSalGraphicsImplBase* pImpl = dynamic_cast<WinSalGraphicsImplBase*>(mpImpl.get()); + if (!mbPrinter && pImpl->DrawTextLayout(rLayout)) + return; // handled by pImpl + + 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 = getTextRenderModeForResolutionIndependentLayoutEnabled(); + const bool bUseDWrite = bVerticalScreenText || bRenderingModeNatural; + DrawTextLayout(rLayout, hDC, bUseDWrite, bRenderingModeNatural); + + ::SelectFont(hDC, hOrigFont); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |