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Diffstat (limited to '')
| -rw-r--r-- | vcl/win/gdi/DWriteTextRenderer.cxx | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/vcl/win/gdi/DWriteTextRenderer.cxx b/vcl/win/gdi/DWriteTextRenderer.cxx new file mode 100644 index 000000000..734b68b07 --- /dev/null +++ b/vcl/win/gdi/DWriteTextRenderer.cxx @@ -0,0 +1,413 @@ +/* -*- 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 <win/salgdi.h> +#include <win/saldata.hxx> +#include <outdev.h> + +#include <win/DWriteTextRenderer.hxx> + +#include <sft.hxx> +#include <sallayout.hxx> + +#include <shlwapi.h> +#include <winver.h> + +#include <comphelper/windowserrorstring.hxx> +#include <sal/log.hxx> + +namespace +{ + +D2DTextAntiAliasMode lclGetSystemTextAntiAliasMode() +{ + D2DTextAntiAliasMode eMode = D2DTextAntiAliasMode::Default; + + BOOL bFontSmoothing; + if (!SystemParametersInfoW(SPI_GETFONTSMOOTHING, 0, &bFontSmoothing, 0)) + return eMode; + + if (bFontSmoothing) + { + eMode = D2DTextAntiAliasMode::AntiAliased; + + UINT nType; + if (SystemParametersInfoW(SPI_GETFONTSMOOTHINGTYPE, 0, &nType, 0) && nType == FE_FONTSMOOTHINGCLEARTYPE) + eMode = D2DTextAntiAliasMode::ClearType; + } + else + { + eMode = D2DTextAntiAliasMode::Aliased; + } + + return eMode; +} + +IDWriteRenderingParams* lclSetRenderingMode(IDWriteFactory* pDWriteFactory, DWRITE_RENDERING_MODE eRenderingMode) +{ + IDWriteRenderingParams* pDefaultParameters = nullptr; + pDWriteFactory->CreateRenderingParams(&pDefaultParameters); + + IDWriteRenderingParams* pParameters = nullptr; + pDWriteFactory->CreateCustomRenderingParams( + pDefaultParameters->GetGamma(), + pDefaultParameters->GetEnhancedContrast(), + pDefaultParameters->GetClearTypeLevel(), + pDefaultParameters->GetPixelGeometry(), + eRenderingMode, + &pParameters); + return pParameters; +} + +#ifdef SAL_LOG_WARN +HRESULT checkResult(HRESULT hr, const char* file, size_t line) +{ + if (FAILED(hr)) + { + OUString sLocationString = OUString::createFromAscii(file) + ":" + OUString::number(line) + " "; + SAL_DETAIL_LOG_STREAM(SAL_DETAIL_ENABLE_LOG_WARN, ::SAL_DETAIL_LOG_LEVEL_WARN, + "vcl.gdi", sLocationString.toUtf8().getStr(), + "HRESULT failed with: 0x" << OUString::number(hr, 16) << ": " << WindowsErrorStringFromHRESULT(hr)); + } + return hr; +} + +#define CHECKHR(funct) checkResult(funct, __FILE__, __LINE__) +#else +#define CHECKHR(funct) (funct) +#endif + + +} // end anonymous namespace + +D2DWriteTextOutRenderer::D2DWriteTextOutRenderer() + : mpD2DFactory(nullptr), + mpDWriteFactory(nullptr), + mpGdiInterop(nullptr), + mpRT(nullptr), + mRTProps(D2D1::RenderTargetProperties(D2D1_RENDER_TARGET_TYPE_DEFAULT, + D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_PREMULTIPLIED), + 0, 0)), + mpFontFace(nullptr), + mlfEmHeight(0.0f), + mhDC(nullptr), + meTextAntiAliasMode(D2DTextAntiAliasMode::Default) +{ + HRESULT hr = S_OK; + hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, __uuidof(ID2D1Factory), nullptr, reinterpret_cast<void **>(&mpD2DFactory)); + hr = DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory), reinterpret_cast<IUnknown**>(&mpDWriteFactory)); + if (SUCCEEDED(hr)) + { + hr = mpDWriteFactory->GetGdiInterop(&mpGdiInterop); + hr = CreateRenderTarget(); + } + meTextAntiAliasMode = lclGetSystemTextAntiAliasMode(); +} + +D2DWriteTextOutRenderer::~D2DWriteTextOutRenderer() +{ + if (mpRT) + mpRT->Release(); + if (mpGdiInterop) + mpGdiInterop->Release(); + if (mpDWriteFactory) + mpDWriteFactory->Release(); + if (mpD2DFactory) + mpD2DFactory->Release(); +} + +void D2DWriteTextOutRenderer::applyTextAntiAliasMode() +{ + D2D1_TEXT_ANTIALIAS_MODE eTextAAMode = D2D1_TEXT_ANTIALIAS_MODE_DEFAULT; + DWRITE_RENDERING_MODE eRenderingMode = DWRITE_RENDERING_MODE_DEFAULT; + switch (meTextAntiAliasMode) + { + case D2DTextAntiAliasMode::Default: + eRenderingMode = DWRITE_RENDERING_MODE_DEFAULT; + eTextAAMode = D2D1_TEXT_ANTIALIAS_MODE_DEFAULT; + break; + case D2DTextAntiAliasMode::Aliased: + eRenderingMode = DWRITE_RENDERING_MODE_ALIASED; + eTextAAMode = D2D1_TEXT_ANTIALIAS_MODE_ALIASED; + break; + case D2DTextAntiAliasMode::AntiAliased: + eRenderingMode = DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC; + eTextAAMode = D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE; + break; + case D2DTextAntiAliasMode::ClearType: + eRenderingMode = DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC; + eTextAAMode = D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE; + break; + default: + break; + } + mpRT->SetTextRenderingParams(lclSetRenderingMode(mpDWriteFactory, eRenderingMode)); + mpRT->SetTextAntialiasMode(eTextAAMode); +} + +HRESULT D2DWriteTextOutRenderer::CreateRenderTarget() +{ + if (mpRT) + { + mpRT->Release(); + mpRT = nullptr; + } + HRESULT hr = CHECKHR(mpD2DFactory->CreateDCRenderTarget(&mRTProps, &mpRT)); + if (SUCCEEDED(hr)) + applyTextAntiAliasMode(); + return hr; +} + +void D2DWriteTextOutRenderer::changeTextAntiAliasMode(D2DTextAntiAliasMode eMode) +{ + if (meTextAntiAliasMode != eMode) + { + meTextAntiAliasMode = eMode; + applyTextAntiAliasMode(); + } +} + +bool D2DWriteTextOutRenderer::Ready() const +{ + return mpGdiInterop && mpRT; +} + +HRESULT D2DWriteTextOutRenderer::BindDC(HDC hDC, tools::Rectangle const & rRect) +{ + RECT const rc = { rRect.Left(), rRect.Top(), rRect.Right(), rRect.Bottom() }; + return CHECKHR(mpRT->BindDC(hDC, &rc)); +} + +bool D2DWriteTextOutRenderer::operator ()(GenericSalLayout const & rLayout, SalGraphics& rGraphics, HDC hDC) +{ + bool bRetry = false; + bool bResult = false; + int nCount = 0; + do + { + bRetry = false; + bResult = performRender(rLayout, rGraphics, hDC, bRetry); + nCount++; + } while (bRetry && nCount < 3); + return bResult; +} + +bool D2DWriteTextOutRenderer::performRender(GenericSalLayout const & rLayout, SalGraphics& rGraphics, HDC hDC, bool& bRetry) +{ + if (!Ready()) + return false; + + HRESULT hr = S_OK; + hr = BindDC(hDC); + + if (hr == D2DERR_RECREATE_TARGET) + { + CreateRenderTarget(); + bRetry = true; + return false; + } + if (FAILED(hr)) + { + // If for any reason we can't bind fallback to legacy APIs. + return ExTextOutRenderer()(rLayout, rGraphics, hDC); + } + + mlfEmHeight = 0; + if (!GetDWriteFaceFromHDC(hDC, &mpFontFace, &mlfEmHeight)) + return false; + + const WinFontInstance& rWinFont = static_cast<const WinFontInstance&>(rLayout.GetFont()); + float fHScale = rWinFont.getHScale(); + + tools::Rectangle bounds; + bool succeeded = rLayout.GetBoundRect(bounds); + if (succeeded) + { + hr = BindDC(hDC, bounds); // Update the bounding rect. + succeeded &= SUCCEEDED(hr); + } + + ID2D1SolidColorBrush* pBrush = nullptr; + if (succeeded) + { + COLORREF bgrTextColor = GetTextColor(hDC); + D2D1::ColorF aD2DColor(GetRValue(bgrTextColor) / 255.0f, GetGValue(bgrTextColor) / 255.0f, GetBValue(bgrTextColor) / 255.0f); + succeeded &= SUCCEEDED(CHECKHR(mpRT->CreateSolidColorBrush(aD2DColor, &pBrush))); + } + + if (succeeded) + { + mpRT->BeginDraw(); + + int nStart = 0; + Point aPos(0, 0); + const GlyphItem* pGlyph; + while (rLayout.GetNextGlyph(&pGlyph, aPos, nStart)) + { + UINT16 glyphIndices[] = { pGlyph->glyphId() }; + FLOAT glyphAdvances[] = { static_cast<FLOAT>(pGlyph->m_nNewWidth) / fHScale }; + DWRITE_GLYPH_OFFSET glyphOffsets[] = { { 0.0f, 0.0f }, }; + D2D1_POINT_2F baseline = { static_cast<FLOAT>(aPos.X() - bounds.Left()) / fHScale, + static_cast<FLOAT>(aPos.Y() - bounds.Top()) }; + WinFontTransformGuard aTransformGuard(mpRT, fHScale, rLayout, baseline); + DWRITE_GLYPH_RUN glyphs = { + mpFontFace, + mlfEmHeight, + 1, + glyphIndices, + glyphAdvances, + glyphOffsets, + false, + 0 + }; + + mpRT->DrawGlyphRun(baseline, &glyphs, pBrush); + } + + hr = CHECKHR(mpRT->EndDraw()); + } + + if (pBrush) + pBrush->Release(); + + ReleaseFont(); + + if (hr == D2DERR_RECREATE_TARGET) + { + CreateRenderTarget(); + bRetry = true; + } + + return succeeded; +} + +bool D2DWriteTextOutRenderer::BindFont(HDC hDC) +{ + // A TextOutRender can only be bound to one font at a time, so the + assert(mpFontFace == nullptr); + if (mpFontFace) + { + ReleaseFont(); + return false; + } + + // Initially bind to an empty rectangle to get access to the font face, + // we'll update it once we've calculated a bounding rect in DrawGlyphs + if (FAILED(BindDC(mhDC = hDC))) + return false; + + mlfEmHeight = 0; + return GetDWriteFaceFromHDC(hDC, &mpFontFace, &mlfEmHeight); +} + +bool D2DWriteTextOutRenderer::ReleaseFont() +{ + mpFontFace->Release(); + mpFontFace = nullptr; + mhDC = nullptr; + + return true; +} + +// GetGlyphInkBoxes +// The inkboxes returned have their origin on the baseline, to a -ve value +// of Top() means the glyph extends abs(Top()) many pixels above the +// baseline, and +ve means the ink starts that many pixels below. +std::vector<tools::Rectangle> D2DWriteTextOutRenderer::GetGlyphInkBoxes(uint16_t const * pGid, uint16_t const * pGidEnd) const +{ + ptrdiff_t nGlyphs = pGidEnd - pGid; + if (nGlyphs < 0) + return std::vector<tools::Rectangle>(); + + DWRITE_FONT_METRICS aFontMetrics; + mpFontFace->GetMetrics(&aFontMetrics); + + std::vector<DWRITE_GLYPH_METRICS> metrics(nGlyphs); + if (!SUCCEEDED(CHECKHR(mpFontFace->GetDesignGlyphMetrics(pGid, nGlyphs, metrics.data())))) + return std::vector<tools::Rectangle>(); + + std::vector<tools::Rectangle> aOut(nGlyphs); + auto pOut = aOut.begin(); + for (auto &m : metrics) + { + const long left = m.leftSideBearing, + top = m.topSideBearing - m.verticalOriginY, + right = m.advanceWidth - m.rightSideBearing, + bottom = INT32(m.advanceHeight) - m.verticalOriginY - m.bottomSideBearing; + + // Scale to screen space. + pOut->SetLeft( std::floor(left * mlfEmHeight / aFontMetrics.designUnitsPerEm) ); + pOut->SetTop( std::floor(top * mlfEmHeight / aFontMetrics.designUnitsPerEm) ); + pOut->SetRight( std::ceil(right * mlfEmHeight / aFontMetrics.designUnitsPerEm) ); + pOut->SetBottom( std::ceil(bottom * mlfEmHeight / aFontMetrics.designUnitsPerEm) ); + + ++pOut; + } + + return aOut; +} + +bool D2DWriteTextOutRenderer::GetDWriteFaceFromHDC(HDC hDC, IDWriteFontFace ** ppFontFace, float * lfSize) const +{ + bool succeeded = SUCCEEDED(CHECKHR(mpGdiInterop->CreateFontFaceFromHdc(hDC, ppFontFace))); + + if (succeeded) + { + LOGFONTW aLogFont; + HFONT hFont = static_cast<HFONT>(::GetCurrentObject(hDC, OBJ_FONT)); + + GetObjectW(hFont, sizeof(LOGFONTW), &aLogFont); + float dpix, dpiy; + mpRT->GetDpi(&dpix, &dpiy); + *lfSize = aLogFont.lfHeight * 96.0f / dpiy; + + assert(*lfSize < 0); + *lfSize *= -1; + } + + return succeeded; +} + +WinFontTransformGuard::WinFontTransformGuard(ID2D1RenderTarget* pRenderTarget, float fHScale, + const GenericSalLayout& rLayout, + const D2D1_POINT_2F& rBaseline) + : mpRenderTarget(pRenderTarget) +{ + pRenderTarget->GetTransform(&maTransform); + D2D1::Matrix3x2F aTransform = maTransform; + if (fHScale != 1.0f) + { + aTransform + = aTransform * D2D1::Matrix3x2F::Scale(D2D1::Size(fHScale, 1.0f), D2D1::Point2F(0, 0)); + } + + if (rLayout.GetOrientation() != 0) + { + // DWrite angle is in clockwise degrees, our orientation is in counter-clockwise 10th + // degrees. + aTransform = aTransform + * D2D1::Matrix3x2F::Rotation( + -static_cast<FLOAT>(rLayout.GetOrientation()) / 10, rBaseline); + } + mpRenderTarget->SetTransform(aTransform); +} + +WinFontTransformGuard::~WinFontTransformGuard() { mpRenderTarget->SetTransform(maTransform); } + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |