diff options
Diffstat (limited to 'src/gui/text/windows/qwindowsfontenginedirectwrite.cpp')
| -rw-r--r-- | src/gui/text/windows/qwindowsfontenginedirectwrite.cpp | 1030 |
1 files changed, 1030 insertions, 0 deletions
diff --git a/src/gui/text/windows/qwindowsfontenginedirectwrite.cpp b/src/gui/text/windows/qwindowsfontenginedirectwrite.cpp new file mode 100644 index 0000000000..d96e65a532 --- /dev/null +++ b/src/gui/text/windows/qwindowsfontenginedirectwrite.cpp @@ -0,0 +1,1030 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QT_NO_DIRECTWRITE + +#include "qwindowsfontenginedirectwrite_p.h" +#include "qwindowsfontdatabase_p.h" + +#include <QtCore/QtEndian> +#include <QtCore/QVarLengthArray> +#include <QtCore/QFile> +#include <private/qstringiterator_p.h> +#include <QtCore/private/qsystemlibrary_p.h> +#include <QtCore/private/qwinregistry_p.h> +#include <QtGui/private/qguiapplication_p.h> +#include <qpa/qplatformintegration.h> +#include <QtGui/private/qhighdpiscaling_p.h> +#include <QtGui/qpainterpath.h> + +#if defined(QT_USE_DIRECTWRITE2) +# include <dwrite_2.h> +#else +# include <dwrite.h> +#endif + +#include <d2d1.h> + +QT_BEGIN_NAMESPACE + +// Clang does not consider __declspec(nothrow) as nothrow +QT_WARNING_DISABLE_CLANG("-Wmicrosoft-exception-spec") + +// Convert from design units to logical pixels +#define DESIGN_TO_LOGICAL(DESIGN_UNIT_VALUE) \ + QFixed::fromReal((qreal(DESIGN_UNIT_VALUE) / qreal(m_unitsPerEm)) * fontDef.pixelSize) + +namespace { + + class GeometrySink: public IDWriteGeometrySink + { + Q_DISABLE_COPY_MOVE(GeometrySink) + public: + GeometrySink(QPainterPath *path) + : m_refCount(0), m_path(path) + { + Q_ASSERT(m_path != 0); + } + virtual ~GeometrySink() = default; + + IFACEMETHOD_(void, AddBeziers)(const D2D1_BEZIER_SEGMENT *beziers, UINT bezierCount); + IFACEMETHOD_(void, AddLines)(const D2D1_POINT_2F *points, UINT pointCount); + IFACEMETHOD_(void, BeginFigure)(D2D1_POINT_2F startPoint, D2D1_FIGURE_BEGIN figureBegin); + IFACEMETHOD(Close)(); + IFACEMETHOD_(void, EndFigure)(D2D1_FIGURE_END figureEnd); + IFACEMETHOD_(void, SetFillMode)(D2D1_FILL_MODE fillMode); + IFACEMETHOD_(void, SetSegmentFlags)(D2D1_PATH_SEGMENT vertexFlags); + + IFACEMETHOD_(unsigned long, AddRef)(); + IFACEMETHOD_(unsigned long, Release)(); + IFACEMETHOD(QueryInterface)(IID const &riid, void **ppvObject); + + private: + inline static QPointF fromD2D1_POINT_2F(const D2D1_POINT_2F &inp) + { + return QPointF(inp.x, inp.y); + } + + unsigned long m_refCount; + QPointF m_startPoint; + QPainterPath *m_path; + }; + + void GeometrySink::AddBeziers(const D2D1_BEZIER_SEGMENT *beziers, + UINT bezierCount) + { + for (uint i=0; i<bezierCount; ++i) { + QPointF c1 = fromD2D1_POINT_2F(beziers[i].point1); + QPointF c2 = fromD2D1_POINT_2F(beziers[i].point2); + QPointF p2 = fromD2D1_POINT_2F(beziers[i].point3); + + m_path->cubicTo(c1, c2, p2); + } + } + + void GeometrySink::AddLines(const D2D1_POINT_2F *points, UINT pointsCount) + { + for (uint i=0; i<pointsCount; ++i) + m_path->lineTo(fromD2D1_POINT_2F(points[i])); + } + + void GeometrySink::BeginFigure(D2D1_POINT_2F startPoint, + D2D1_FIGURE_BEGIN /*figureBegin*/) + { + m_startPoint = fromD2D1_POINT_2F(startPoint); + m_path->moveTo(m_startPoint); + } + + IFACEMETHODIMP GeometrySink::Close() + { + return E_NOTIMPL; + } + + void GeometrySink::EndFigure(D2D1_FIGURE_END figureEnd) + { + if (figureEnd == D2D1_FIGURE_END_CLOSED) + m_path->closeSubpath(); + } + + void GeometrySink::SetFillMode(D2D1_FILL_MODE fillMode) + { + m_path->setFillRule(fillMode == D2D1_FILL_MODE_ALTERNATE + ? Qt::OddEvenFill + : Qt::WindingFill); + } + + void GeometrySink::SetSegmentFlags(D2D1_PATH_SEGMENT /*vertexFlags*/) + { + /* Not implemented */ + } + + IFACEMETHODIMP_(unsigned long) GeometrySink::AddRef() + { + return InterlockedIncrement(&m_refCount); + } + + IFACEMETHODIMP_(unsigned long) GeometrySink::Release() + { + unsigned long newCount = InterlockedDecrement(&m_refCount); + if (newCount == 0) + { + delete this; + return 0; + } + + return newCount; + } + + IFACEMETHODIMP GeometrySink::QueryInterface(IID const &riid, void **ppvObject) + { + if (__uuidof(IDWriteGeometrySink) == riid) { + *ppvObject = this; + } else if (__uuidof(IUnknown) == riid) { + *ppvObject = this; + } else { + *ppvObject = NULL; + return E_FAIL; + } + + AddRef(); + return S_OK; + } + +} + +static DWRITE_MEASURING_MODE renderModeToMeasureMode(DWRITE_RENDERING_MODE renderMode) +{ + switch (renderMode) { + case DWRITE_RENDERING_MODE_GDI_CLASSIC: + return DWRITE_MEASURING_MODE_GDI_CLASSIC; + case DWRITE_RENDERING_MODE_GDI_NATURAL: + return DWRITE_MEASURING_MODE_GDI_NATURAL; + default: + return DWRITE_MEASURING_MODE_NATURAL; + } +} + +static DWRITE_RENDERING_MODE hintingPreferenceToRenderingMode(QFont::HintingPreference hintingPreference) +{ + if (QHighDpiScaling::isActive() && hintingPreference == QFont::PreferDefaultHinting) + hintingPreference = QFont::PreferVerticalHinting; + + switch (hintingPreference) { + case QFont::PreferNoHinting: + return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC; + case QFont::PreferVerticalHinting: + return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL; + default: + return DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC; + } +} + +/*! + \class QWindowsFontEngineDirectWrite + \brief Windows font engine using Direct Write. + \internal + + Font engine for subpixel positioned text on Windows Vista + (with platform update) and later. If selected during + configuration, the engine will be selected only when the hinting + preference of a font is set to None or Vertical hinting, or + when fontengine=directwrite is selected as platform option. +*/ + +QWindowsFontEngineDirectWrite::QWindowsFontEngineDirectWrite(IDWriteFontFace *directWriteFontFace, + qreal pixelSize, + const QSharedPointer<QWindowsFontEngineData> &d) + : QFontEngine(DirectWrite) + , m_fontEngineData(d) + , m_directWriteFontFace(directWriteFontFace) + , m_directWriteBitmapRenderTarget(0) + , m_lineThickness(-1) + , m_unitsPerEm(-1) + , m_capHeight(-1) + , m_xHeight(-1) +{ + qCDebug(lcQpaFonts) << __FUNCTION__ << pixelSize; + + Q_ASSERT(m_directWriteFontFace); + + m_fontEngineData->directWriteFactory->AddRef(); + m_directWriteFontFace->AddRef(); + + fontDef.pixelSize = pixelSize; + collectMetrics(); + cache_cost = (m_ascent.toInt() + m_descent.toInt()) * m_xHeight.toInt() * 2000; +} + +QWindowsFontEngineDirectWrite::~QWindowsFontEngineDirectWrite() +{ + qCDebug(lcQpaFonts) << __FUNCTION__; + + m_fontEngineData->directWriteFactory->Release(); + m_directWriteFontFace->Release(); + + if (m_directWriteBitmapRenderTarget != 0) + m_directWriteBitmapRenderTarget->Release(); + + if (!m_uniqueFamilyName.isEmpty()) { + QPlatformFontDatabase *pfdb = QGuiApplicationPrivate::platformIntegration()->fontDatabase(); + static_cast<QWindowsFontDatabase *>(pfdb)->derefUniqueFont(m_uniqueFamilyName); + } +} + +#ifndef Q_CC_MINGW +typedef IDWriteLocalFontFileLoader QIdWriteLocalFontFileLoader; + +static UUID uuidIdWriteLocalFontFileLoader() +{ + return __uuidof(IDWriteLocalFontFileLoader); +} +#else // !Q_CC_MINGW +DECLARE_INTERFACE_(QIdWriteLocalFontFileLoader, IDWriteFontFileLoader) +{ + STDMETHOD(GetFilePathLengthFromKey)(THIS_ void const *, UINT32, UINT32*) PURE; + STDMETHOD(GetFilePathFromKey)(THIS_ void const *, UINT32, WCHAR *, UINT32) PURE; + STDMETHOD(GetLastWriteTimeFromKey)(THIS_ void const *, UINT32, FILETIME *) PURE; +}; + +static UUID uuidIdWriteLocalFontFileLoader() +{ + static const UUID result = { 0xb2d9f3ec, 0xc9fe, 0x4a11, {0xa2, 0xec, 0xd8, 0x62, 0x8, 0xf7, 0xc0, 0xa2}}; + return result; +} +#endif // Q_CC_MINGW + +QString QWindowsFontEngineDirectWrite::filenameFromFontFile(IDWriteFontFile *fontFile) +{ + IDWriteFontFileLoader *loader = nullptr; + + HRESULT hr = fontFile->GetLoader(&loader); + if (FAILED(hr)) { + qErrnoWarning("%s: GetLoader failed", __FUNCTION__); + return QString(); + } + + QIdWriteLocalFontFileLoader *localLoader = nullptr; + hr = loader->QueryInterface(uuidIdWriteLocalFontFileLoader(), + reinterpret_cast<void **>(&localLoader)); + + const void *fontFileReferenceKey = nullptr; + UINT32 fontFileReferenceKeySize = 0; + if (SUCCEEDED(hr)) { + hr = fontFile->GetReferenceKey(&fontFileReferenceKey, + &fontFileReferenceKeySize); + if (FAILED(hr)) + qErrnoWarning(hr, "%s: GetReferenceKey failed", __FUNCTION__); + } + + UINT32 filePathLength = 0; + if (SUCCEEDED(hr)) { + hr = localLoader->GetFilePathLengthFromKey(fontFileReferenceKey, + fontFileReferenceKeySize, + &filePathLength); + if (FAILED(hr)) + qErrnoWarning(hr, "GetFilePathLength failed", __FUNCTION__); + } + + QString ret; + if (SUCCEEDED(hr) && filePathLength > 0) { + QVarLengthArray<wchar_t> filePath(filePathLength + 1); + + hr = localLoader->GetFilePathFromKey(fontFileReferenceKey, + fontFileReferenceKeySize, + filePath.data(), + filePathLength + 1); + if (FAILED(hr)) + qErrnoWarning(hr, "%s: GetFilePathFromKey failed", __FUNCTION__); + else + ret = QString::fromWCharArray(filePath.data()); + } + + if (localLoader != nullptr) + localLoader->Release(); + + if (loader != nullptr) + loader->Release(); + return ret; +} + +void QWindowsFontEngineDirectWrite::initializeHeightMetrics() const +{ + DWRITE_FONT_METRICS metrics; + m_directWriteFontFace->GetMetrics(&metrics); + + m_ascent = DESIGN_TO_LOGICAL(metrics.ascent); + m_descent = DESIGN_TO_LOGICAL(metrics.descent); + m_leading = DESIGN_TO_LOGICAL(metrics.lineGap); + + QFontEngine::initializeHeightMetrics(); +} + +void QWindowsFontEngineDirectWrite::collectMetrics() +{ + DWRITE_FONT_METRICS metrics; + + m_directWriteFontFace->GetMetrics(&metrics); + m_unitsPerEm = metrics.designUnitsPerEm; + + m_lineThickness = DESIGN_TO_LOGICAL(metrics.underlineThickness); + m_capHeight = DESIGN_TO_LOGICAL(metrics.capHeight); + m_xHeight = DESIGN_TO_LOGICAL(metrics.xHeight); + m_underlinePosition = DESIGN_TO_LOGICAL(metrics.underlinePosition); + + IDWriteFontFile *fontFile = nullptr; + UINT32 numberOfFiles = 1; + if (SUCCEEDED(m_directWriteFontFace->GetFiles(&numberOfFiles, &fontFile))) { + m_faceId.filename = QFile::encodeName(filenameFromFontFile(fontFile)); + fontFile->Release(); + } + + QByteArray table = getSfntTable(MAKE_TAG('h', 'h', 'e', 'a')); + const int advanceWidthMaxLocation = 10; + if (table.size() >= advanceWidthMaxLocation + int(sizeof(quint16))) { + quint16 advanceWidthMax = qFromBigEndian<quint16>(table.constData() + advanceWidthMaxLocation); + m_maxAdvanceWidth = DESIGN_TO_LOGICAL(advanceWidthMax); + } +} + +QFixed QWindowsFontEngineDirectWrite::underlinePosition() const +{ + if (m_underlinePosition > 0) + return m_underlinePosition; + else + return QFontEngine::underlinePosition(); +} + +QFixed QWindowsFontEngineDirectWrite::lineThickness() const +{ + if (m_lineThickness > 0) + return m_lineThickness; + else + return QFontEngine::lineThickness(); +} + +bool QWindowsFontEngineDirectWrite::getSfntTableData(uint tag, uchar *buffer, uint *length) const +{ + bool ret = false; + + const void *tableData = 0; + UINT32 tableSize; + void *tableContext = 0; + BOOL exists; + HRESULT hr = m_directWriteFontFace->TryGetFontTable(qbswap<quint32>(tag), + &tableData, &tableSize, + &tableContext, &exists); + if (SUCCEEDED(hr)) { + if (exists) { + ret = true; + if (buffer && *length >= tableSize) + memcpy(buffer, tableData, tableSize); + *length = tableSize; + Q_ASSERT(int(*length) > 0); + } + m_directWriteFontFace->ReleaseFontTable(tableContext); + } else { + qErrnoWarning("%s: TryGetFontTable failed", __FUNCTION__); + } + + return ret; +} + +QFixed QWindowsFontEngineDirectWrite::emSquareSize() const +{ + if (m_unitsPerEm > 0) + return m_unitsPerEm; + else + return QFontEngine::emSquareSize(); +} + +glyph_t QWindowsFontEngineDirectWrite::glyphIndex(uint ucs4) const +{ + UINT16 glyphIndex; + + HRESULT hr = m_directWriteFontFace->GetGlyphIndicesW(&ucs4, 1, &glyphIndex); + if (FAILED(hr)) { + qErrnoWarning("%s: glyphIndex failed", __FUNCTION__); + glyphIndex = 0; + } + + return glyphIndex; +} + +bool QWindowsFontEngineDirectWrite::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, + int *nglyphs, QFontEngine::ShaperFlags flags) const +{ + Q_ASSERT(glyphs->numGlyphs >= *nglyphs); + if (*nglyphs < len) { + *nglyphs = len; + return false; + } + + QVarLengthArray<UINT32> codePoints(len); + int actualLength = 0; + QStringIterator it(str, str + len); + while (it.hasNext()) + codePoints[actualLength++] = it.next(); + + QVarLengthArray<UINT16> glyphIndices(actualLength); + HRESULT hr = m_directWriteFontFace->GetGlyphIndicesW(codePoints.data(), actualLength, + glyphIndices.data()); + if (FAILED(hr)) { + qErrnoWarning("%s: GetGlyphIndicesW failed", __FUNCTION__); + return false; + } + + for (int i = 0; i < actualLength; ++i) + glyphs->glyphs[i] = glyphIndices.at(i); + + *nglyphs = actualLength; + glyphs->numGlyphs = actualLength; + + if (!(flags & GlyphIndicesOnly)) + recalcAdvances(glyphs, {}); + + return true; +} + +QFontEngine::FaceId QWindowsFontEngineDirectWrite::faceId() const +{ + return m_faceId; +} + +void QWindowsFontEngineDirectWrite::recalcAdvances(QGlyphLayout *glyphs, QFontEngine::ShaperFlags) const +{ + QVarLengthArray<UINT16> glyphIndices(glyphs->numGlyphs); + + // ### Caching? + for(int i=0; i<glyphs->numGlyphs; i++) + glyphIndices[i] = UINT16(glyphs->glyphs[i]); + + QVarLengthArray<DWRITE_GLYPH_METRICS> glyphMetrics(glyphIndices.size()); + + HRESULT hr; + DWRITE_RENDERING_MODE renderMode = hintingPreferenceToRenderingMode(QFont::HintingPreference(fontDef.hintingPreference)); + if (renderMode == DWRITE_RENDERING_MODE_GDI_CLASSIC || renderMode == DWRITE_RENDERING_MODE_GDI_NATURAL) { + hr = m_directWriteFontFace->GetGdiCompatibleGlyphMetrics(float(fontDef.pixelSize), + 1.0f, + NULL, + TRUE, + glyphIndices.data(), + glyphIndices.size(), + glyphMetrics.data()); + } else { + hr = m_directWriteFontFace->GetDesignGlyphMetrics(glyphIndices.data(), + glyphIndices.size(), + glyphMetrics.data()); + } + if (SUCCEEDED(hr)) { + qreal stretch = fontDef.stretch != QFont::AnyStretch ? fontDef.stretch / 100.0 : 1.0; + for (int i = 0; i < glyphs->numGlyphs; ++i) + glyphs->advances[i] = DESIGN_TO_LOGICAL(glyphMetrics[i].advanceWidth * stretch); + } else { + qErrnoWarning("%s: GetDesignGlyphMetrics failed", __FUNCTION__); + } +} + +void QWindowsFontEngineDirectWrite::addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs, + QPainterPath *path, QTextItem::RenderFlags flags) +{ + QVarLengthArray<UINT16> glyphIndices(nglyphs); + QVarLengthArray<DWRITE_GLYPH_OFFSET> glyphOffsets(nglyphs); + QVarLengthArray<FLOAT> glyphAdvances(nglyphs); + + for (int i=0; i<nglyphs; ++i) { + glyphIndices[i] = glyphs[i]; + glyphOffsets[i].advanceOffset = positions[i].x.toReal(); + glyphOffsets[i].ascenderOffset = -positions[i].y.toReal(); + glyphAdvances[i] = 0.0; + } + + GeometrySink geometrySink(path); + HRESULT hr = m_directWriteFontFace->GetGlyphRunOutline( + fontDef.pixelSize, + glyphIndices.data(), + glyphAdvances.data(), + glyphOffsets.data(), + nglyphs, + false, + flags & QTextItem::RightToLeft, + &geometrySink + ); + + if (FAILED(hr)) + qErrnoWarning("%s: GetGlyphRunOutline failed", __FUNCTION__); +} + +glyph_metrics_t QWindowsFontEngineDirectWrite::boundingBox(const QGlyphLayout &glyphs) +{ + if (glyphs.numGlyphs == 0) + return glyph_metrics_t(); + QFixed w = 0; + for (int i = 0; i < glyphs.numGlyphs; ++i) + w += glyphs.effectiveAdvance(i); + + return glyph_metrics_t(0, -ascent(), w - lastRightBearing(glyphs), ascent() + descent(), w, 0); +} + +glyph_metrics_t QWindowsFontEngineDirectWrite::boundingBox(glyph_t g) +{ + UINT16 glyphIndex = g; + + DWRITE_GLYPH_METRICS glyphMetrics; + HRESULT hr = m_directWriteFontFace->GetDesignGlyphMetrics(&glyphIndex, 1, &glyphMetrics); + if (SUCCEEDED(hr)) { + QFixed advanceWidth = DESIGN_TO_LOGICAL(glyphMetrics.advanceWidth); + QFixed leftSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.leftSideBearing); + QFixed rightSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.rightSideBearing); + QFixed advanceHeight = DESIGN_TO_LOGICAL(glyphMetrics.advanceHeight); + QFixed verticalOriginY = DESIGN_TO_LOGICAL(glyphMetrics.verticalOriginY); + QFixed topSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.topSideBearing); + QFixed bottomSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.bottomSideBearing); + QFixed width = advanceWidth - leftSideBearing - rightSideBearing; + QFixed height = advanceHeight - topSideBearing - bottomSideBearing; + return glyph_metrics_t(leftSideBearing, + -verticalOriginY + topSideBearing, + width, + height, + advanceWidth, + 0); + } else { + qErrnoWarning("%s: GetDesignGlyphMetrics failed", __FUNCTION__); + } + + return glyph_metrics_t(); +} + +QFixed QWindowsFontEngineDirectWrite::capHeight() const +{ + if (m_capHeight <= 0) + return calculatedCapHeight(); + + return m_capHeight; +} + +QFixed QWindowsFontEngineDirectWrite::xHeight() const +{ + return m_xHeight; +} + +qreal QWindowsFontEngineDirectWrite::maxCharWidth() const +{ + return m_maxAdvanceWidth.toReal(); +} + +QImage QWindowsFontEngineDirectWrite::alphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition, const QTransform &t) +{ + QImage im = imageForGlyph(glyph, subPixelPosition, glyphMargin(Format_A8), t); + + QImage alphaMap(im.width(), im.height(), QImage::Format_Alpha8); + + for (int y=0; y<im.height(); ++y) { + const uint *src = reinterpret_cast<const uint *>(im.constScanLine(y)); + uchar *dst = alphaMap.scanLine(y); + for (int x=0; x<im.width(); ++x) { + *dst = 255 - (m_fontEngineData->pow_gamma[qGray(0xffffffff - *src)] * 255. / 2047.); + ++dst; + ++src; + } + } + + return alphaMap; +} + +QImage QWindowsFontEngineDirectWrite::alphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition) +{ + return alphaMapForGlyph(glyph, subPixelPosition, QTransform()); +} + +bool QWindowsFontEngineDirectWrite::supportsSubPixelPositions() const +{ + return true; +} + +QImage QWindowsFontEngineDirectWrite::imageForGlyph(glyph_t t, + QFixed subPixelPosition, + int margin, + const QTransform &originalTransform, + const QColor &color) +{ + UINT16 glyphIndex = t; + FLOAT glyphAdvance = 0; + + DWRITE_GLYPH_OFFSET glyphOffset; + glyphOffset.advanceOffset = 0; + glyphOffset.ascenderOffset = 0; + + DWRITE_GLYPH_RUN glyphRun; + glyphRun.fontFace = m_directWriteFontFace; + glyphRun.fontEmSize = fontDef.pixelSize; + glyphRun.glyphCount = 1; + glyphRun.glyphIndices = &glyphIndex; + glyphRun.glyphAdvances = &glyphAdvance; + glyphRun.isSideways = false; + glyphRun.bidiLevel = 0; + glyphRun.glyphOffsets = &glyphOffset; + + QTransform xform = originalTransform; + if (fontDef.stretch != 100 && fontDef.stretch != QFont::AnyStretch) + xform.scale(fontDef.stretch / 100.0, 1.0); + + DWRITE_MATRIX transform; + transform.dx = subPixelPosition.toReal(); + transform.dy = 0; + transform.m11 = xform.m11(); + transform.m12 = xform.m12(); + transform.m21 = xform.m21(); + transform.m22 = xform.m22(); + + DWRITE_RENDERING_MODE renderMode = + hintingPreferenceToRenderingMode(QFont::HintingPreference(fontDef.hintingPreference)); + DWRITE_MEASURING_MODE measureMode = + renderModeToMeasureMode(renderMode); + + IDWriteGlyphRunAnalysis *glyphAnalysis = NULL; + HRESULT hr = m_fontEngineData->directWriteFactory->CreateGlyphRunAnalysis( + &glyphRun, + 1.0f, + &transform, + renderMode, + measureMode, + 0.0, 0.0, + &glyphAnalysis + ); + + if (SUCCEEDED(hr)) { + RECT rect; + glyphAnalysis->GetAlphaTextureBounds(DWRITE_TEXTURE_CLEARTYPE_3x1, &rect); + + if (rect.top == rect.bottom || rect.left == rect.right) + return QImage(); + + QRect boundingRect = QRect(QPoint(rect.left - margin, + rect.top - margin), + QPoint(rect.right + margin, + rect.bottom + margin)); + + + const int width = boundingRect.width() - 1; // -1 due to Qt's off-by-one definition of a QRect + const int height = boundingRect.height() - 1; + + QImage image; +#if defined(QT_USE_DIRECTWRITE2) + HRESULT hr = DWRITE_E_NOCOLOR; + IDWriteColorGlyphRunEnumerator *enumerator = 0; + IDWriteFactory2 *factory2 = nullptr; + if (glyphFormat == QFontEngine::Format_ARGB + && SUCCEEDED(m_fontEngineData->directWriteFactory->QueryInterface(__uuidof(IDWriteFactory2), + reinterpret_cast<void **>(&factory2)))) { + hr = factory2->TranslateColorGlyphRun(0.0f, + 0.0f, + &glyphRun, + NULL, + measureMode, + NULL, + 0, + &enumerator); + image = QImage(width, height, QImage::Format_ARGB32_Premultiplied); + image.fill(0); + } else +#endif + { + image = QImage(width, height, QImage::Format_RGB32); + image.fill(0xffffffff); + } + +#if defined(QT_USE_DIRECTWRITE2) + BOOL ok = true; + + if (SUCCEEDED(hr)) { + while (SUCCEEDED(hr) && ok) { + const DWRITE_COLOR_GLYPH_RUN *colorGlyphRun = 0; + hr = enumerator->GetCurrentRun(&colorGlyphRun); + if (FAILED(hr)) { // No colored runs, only outline + qErrnoWarning(hr, "%s: IDWriteColorGlyphRunEnumerator::GetCurrentRun failed", __FUNCTION__); + break; + } + + IDWriteGlyphRunAnalysis *colorGlyphsAnalysis = NULL; + hr = m_fontEngineData->directWriteFactory->CreateGlyphRunAnalysis( + &colorGlyphRun->glyphRun, + 1.0f, + &transform, + renderMode, + measureMode, + 0.0, 0.0, + &colorGlyphsAnalysis + ); + if (FAILED(hr)) { + qErrnoWarning(hr, "%s: CreateGlyphRunAnalysis failed for color run", __FUNCTION__); + break; + } + + float r, g, b, a; + if (colorGlyphRun->paletteIndex == 0xFFFF) { + r = float(color.redF()); + g = float(color.greenF()); + b = float(color.blueF()); + a = float(color.alphaF()); + } else { + r = qBound(0.0f, colorGlyphRun->runColor.r, 1.0f); + g = qBound(0.0f, colorGlyphRun->runColor.g, 1.0f); + b = qBound(0.0f, colorGlyphRun->runColor.b, 1.0f); + a = qBound(0.0f, colorGlyphRun->runColor.a, 1.0f); + } + + if (!qFuzzyIsNull(a)) { + renderGlyphRun(&image, + r, + g, + b, + a, + colorGlyphsAnalysis, + boundingRect); + } + colorGlyphsAnalysis->Release(); + + hr = enumerator->MoveNext(&ok); + if (FAILED(hr)) { + qErrnoWarning(hr, "%s: IDWriteColorGlyphRunEnumerator::MoveNext failed", __FUNCTION__); + break; + } + } + } else +#endif + { + float r, g, b, a; + if (glyphFormat == QFontEngine::Format_ARGB) { + r = float(color.redF()); + g = float(color.greenF()); + b = float(color.blueF()); + a = float(color.alphaF()); + } else { + r = g = b = a = 0.0; + } + + renderGlyphRun(&image, + r, + g, + b, + a, + glyphAnalysis, + boundingRect); + } + + glyphAnalysis->Release(); + return image; + } else { + qErrnoWarning(hr, "%s: CreateGlyphRunAnalysis failed", __FUNCTION__); + return QImage(); + } +} + + +void QWindowsFontEngineDirectWrite::renderGlyphRun(QImage *destination, + float r, + float g, + float b, + float a, + IDWriteGlyphRunAnalysis *glyphAnalysis, + const QRect &boundingRect) +{ + const int width = destination->width(); + const int height = destination->height(); + + r *= 255.0; + g *= 255.0; + b *= 255.0; + + const int size = width * height * 3; + if (size > 0) { + RECT rect; + rect.left = boundingRect.left(); + rect.top = boundingRect.top(); + rect.right = boundingRect.right(); + rect.bottom = boundingRect.bottom(); + + QVarLengthArray<BYTE, 1024> alphaValueArray(size); + BYTE *alphaValues = alphaValueArray.data(); + memset(alphaValues, 0, size); + + HRESULT hr = glyphAnalysis->CreateAlphaTexture(DWRITE_TEXTURE_CLEARTYPE_3x1, + &rect, + alphaValues, + size); + if (SUCCEEDED(hr)) { + if (destination->hasAlphaChannel()) { + for (int y = 0; y < height; ++y) { + uint *dest = reinterpret_cast<uint *>(destination->scanLine(y)); + BYTE *src = alphaValues + width * 3 * y; + + for (int x = 0; x < width; ++x) { + float redAlpha = a * *src++ / 255.0; + float greenAlpha = a * *src++ / 255.0; + float blueAlpha = a * *src++ / 255.0; + float averageAlpha = (redAlpha + greenAlpha + blueAlpha) / 3.0; + + QRgb currentRgb = dest[x]; + dest[x] = qRgba(qRound(qRed(currentRgb) * (1.0 - averageAlpha) + averageAlpha * r), + qRound(qGreen(currentRgb) * (1.0 - averageAlpha) + averageAlpha * g), + qRound(qBlue(currentRgb) * (1.0 - averageAlpha) + averageAlpha * b), + qRound(qAlpha(currentRgb) * (1.0 - averageAlpha) + averageAlpha * 255)); + } + } + + } else { + for (int y = 0; y < height; ++y) { + uint *dest = reinterpret_cast<uint *>(destination->scanLine(y)); + BYTE *src = alphaValues + width * 3 * y; + + for (int x = 0; x < width; ++x) { + dest[x] = *(src + 0) << 16 + | *(src + 1) << 8 + | *(src + 2); + + src += 3; + } + } + } + } else { + qErrnoWarning("%s: CreateAlphaTexture failed", __FUNCTION__); + } + } else { + glyphAnalysis->Release(); + qWarning("%s: Glyph has no bounds", __FUNCTION__); + } +} + +QImage QWindowsFontEngineDirectWrite::alphaRGBMapForGlyph(glyph_t t, + QFixed subPixelPosition, + const QTransform &xform) +{ + QImage mask = imageForGlyph(t, + subPixelPosition, + glyphMargin(QFontEngine::Format_A32), + xform); + + return mask.depth() == 32 + ? mask + : mask.convertToFormat(QImage::Format_RGB32); +} + +QFontEngine *QWindowsFontEngineDirectWrite::cloneWithSize(qreal pixelSize) const +{ + QWindowsFontEngineDirectWrite *fontEngine = new QWindowsFontEngineDirectWrite(m_directWriteFontFace, + pixelSize, + m_fontEngineData); + + fontEngine->fontDef = fontDef; + fontEngine->fontDef.pixelSize = pixelSize; + if (!m_uniqueFamilyName.isEmpty()) { + fontEngine->setUniqueFamilyName(m_uniqueFamilyName); + QPlatformFontDatabase *pfdb = QGuiApplicationPrivate::platformIntegration()->fontDatabase(); + static_cast<QWindowsFontDatabase *>(pfdb)->refUniqueFont(m_uniqueFamilyName); + } + + return fontEngine; +} + +Qt::HANDLE QWindowsFontEngineDirectWrite::handle() const +{ + return m_directWriteFontFace; +} + +void QWindowsFontEngineDirectWrite::initFontInfo(const QFontDef &request, + int dpi) +{ + fontDef = request; + + if (fontDef.pointSize < 0) + fontDef.pointSize = fontDef.pixelSize * 72. / dpi; + else if (fontDef.pixelSize == -1) + fontDef.pixelSize = qRound(fontDef.pointSize * dpi / 72.); +} + +QString QWindowsFontEngineDirectWrite::fontNameSubstitute(const QString &familyName) +{ + const QString substitute = + QWinRegistryKey(HKEY_LOCAL_MACHINE, + LR"(Software\Microsoft\Windows NT\CurrentVersion\FontSubstitutes)") + .stringValue(familyName); + return substitute.isEmpty() ? familyName : substitute; +} + +glyph_metrics_t QWindowsFontEngineDirectWrite::alphaMapBoundingBox(glyph_t glyph, + QFixed subPixelPosition, + const QTransform &originalTransform, + GlyphFormat format) +{ + Q_UNUSED(format); + + QTransform matrix = originalTransform; + if (fontDef.stretch != 100 && fontDef.stretch != QFont::AnyStretch) + matrix.scale(fontDef.stretch / 100.0, 1.0); + + glyph_metrics_t bbox = QFontEngine::boundingBox(glyph, matrix); // To get transformed advance + + UINT16 glyphIndex = glyph; + FLOAT glyphAdvance = 0; + + DWRITE_GLYPH_OFFSET glyphOffset; + glyphOffset.advanceOffset = 0; + glyphOffset.ascenderOffset = 0; + + DWRITE_GLYPH_RUN glyphRun; + glyphRun.fontFace = m_directWriteFontFace; + glyphRun.fontEmSize = fontDef.pixelSize; + glyphRun.glyphCount = 1; + glyphRun.glyphIndices = &glyphIndex; + glyphRun.glyphAdvances = &glyphAdvance; + glyphRun.isSideways = false; + glyphRun.bidiLevel = 0; + glyphRun.glyphOffsets = &glyphOffset; + + DWRITE_MATRIX transform; + transform.dx = subPixelPosition.toReal(); + transform.dy = 0; + transform.m11 = matrix.m11(); + transform.m12 = matrix.m12(); + transform.m21 = matrix.m21(); + transform.m22 = matrix.m22(); + + DWRITE_RENDERING_MODE renderMode = + hintingPreferenceToRenderingMode(QFont::HintingPreference(fontDef.hintingPreference)); + DWRITE_MEASURING_MODE measureMode = renderModeToMeasureMode(renderMode); + + IDWriteGlyphRunAnalysis *glyphAnalysis = NULL; + HRESULT hr = m_fontEngineData->directWriteFactory->CreateGlyphRunAnalysis( + &glyphRun, + 1.0f, + &transform, + renderMode, + measureMode, + 0.0, 0.0, + &glyphAnalysis + ); + + if (SUCCEEDED(hr)) { + RECT rect; + glyphAnalysis->GetAlphaTextureBounds(DWRITE_TEXTURE_CLEARTYPE_3x1, &rect); + glyphAnalysis->Release(); + + int margin = glyphMargin(format); + + if (rect.left == rect.right || rect.top == rect.bottom) + return glyph_metrics_t(); + + return glyph_metrics_t(rect.left, + rect.top, + rect.right - rect.left + margin * 2, + rect.bottom - rect.top + margin * 2, + bbox.xoff, bbox.yoff); + } else { + return glyph_metrics_t(); + } +} + +QImage QWindowsFontEngineDirectWrite::bitmapForGlyph(glyph_t glyph, QFixed subPixelPosition, const QTransform &t, const QColor &color) +{ + return imageForGlyph(glyph, subPixelPosition, glyphMargin(QFontEngine::Format_ARGB), t, color); +} + +QT_END_NAMESPACE + +#endif // QT_NO_DIRECTWRITE |