summaryrefslogtreecommitdiffstats
path: root/gfx/thebes/gfxDWriteFonts.cpp
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/thebes/gfxDWriteFonts.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/thebes/gfxDWriteFonts.cpp')
-rw-r--r--gfx/thebes/gfxDWriteFonts.cpp709
1 files changed, 709 insertions, 0 deletions
diff --git a/gfx/thebes/gfxDWriteFonts.cpp b/gfx/thebes/gfxDWriteFonts.cpp
new file mode 100644
index 000000000..96a935245
--- /dev/null
+++ b/gfx/thebes/gfxDWriteFonts.cpp
@@ -0,0 +1,709 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * 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/. */
+
+#include "gfxDWriteFonts.h"
+
+#include "mozilla/MemoryReporting.h"
+
+#include <algorithm>
+#include "gfxDWriteFontList.h"
+#include "gfxContext.h"
+#include "gfxTextRun.h"
+#include <dwrite.h>
+
+#include "harfbuzz/hb.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+// This is also in gfxGDIFont.cpp. Would be nice to put it somewhere common,
+// but we can't declare it in the gfxFont.h or gfxFontUtils.h headers
+// because those are exported, and the cairo headers aren't.
+static inline cairo_antialias_t
+GetCairoAntialiasOption(gfxFont::AntialiasOption anAntialiasOption)
+{
+ switch (anAntialiasOption) {
+ default:
+ case gfxFont::kAntialiasDefault:
+ return CAIRO_ANTIALIAS_DEFAULT;
+ case gfxFont::kAntialiasNone:
+ return CAIRO_ANTIALIAS_NONE;
+ case gfxFont::kAntialiasGrayscale:
+ return CAIRO_ANTIALIAS_GRAY;
+ case gfxFont::kAntialiasSubpixel:
+ return CAIRO_ANTIALIAS_SUBPIXEL;
+ }
+}
+
+// Code to determine whether Windows is set to use ClearType font smoothing;
+// based on private functions in cairo-win32-font.c
+
+#ifndef SPI_GETFONTSMOOTHINGTYPE
+#define SPI_GETFONTSMOOTHINGTYPE 0x200a
+#endif
+#ifndef FE_FONTSMOOTHINGCLEARTYPE
+#define FE_FONTSMOOTHINGCLEARTYPE 2
+#endif
+
+static bool
+UsingClearType()
+{
+ BOOL fontSmoothing;
+ if (!SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &fontSmoothing, 0) ||
+ !fontSmoothing)
+ {
+ return false;
+ }
+
+ UINT type;
+ if (SystemParametersInfo(SPI_GETFONTSMOOTHINGTYPE, 0, &type, 0) &&
+ type == FE_FONTSMOOTHINGCLEARTYPE)
+ {
+ return true;
+ }
+ return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// gfxDWriteFont
+gfxDWriteFont::gfxDWriteFont(gfxFontEntry *aFontEntry,
+ const gfxFontStyle *aFontStyle,
+ bool aNeedsBold,
+ AntialiasOption anAAOption)
+ : gfxFont(aFontEntry, aFontStyle, anAAOption)
+ , mCairoFontFace(nullptr)
+ , mMetrics(nullptr)
+ , mSpaceGlyph(0)
+ , mNeedsOblique(false)
+ , mNeedsBold(aNeedsBold)
+ , mUseSubpixelPositions(false)
+ , mAllowManualShowGlyphs(true)
+{
+ gfxDWriteFontEntry *fe =
+ static_cast<gfxDWriteFontEntry*>(aFontEntry);
+ nsresult rv;
+ DWRITE_FONT_SIMULATIONS sims = DWRITE_FONT_SIMULATIONS_NONE;
+ if ((GetStyle()->style != NS_FONT_STYLE_NORMAL) &&
+ fe->IsUpright() &&
+ GetStyle()->allowSyntheticStyle) {
+ // For this we always use the font_matrix for uniformity. Not the
+ // DWrite simulation.
+ mNeedsOblique = true;
+ }
+ if (aNeedsBold) {
+ sims |= DWRITE_FONT_SIMULATIONS_BOLD;
+ }
+
+ rv = fe->CreateFontFace(getter_AddRefs(mFontFace), sims);
+
+ if (NS_FAILED(rv)) {
+ mIsValid = false;
+ return;
+ }
+
+ ComputeMetrics(anAAOption);
+}
+
+gfxDWriteFont::~gfxDWriteFont()
+{
+ if (mCairoFontFace) {
+ cairo_font_face_destroy(mCairoFontFace);
+ }
+ if (mScaledFont) {
+ cairo_scaled_font_destroy(mScaledFont);
+ }
+ delete mMetrics;
+}
+
+gfxFont*
+gfxDWriteFont::CopyWithAntialiasOption(AntialiasOption anAAOption)
+{
+ return new gfxDWriteFont(static_cast<gfxDWriteFontEntry*>(mFontEntry.get()),
+ &mStyle, mNeedsBold, anAAOption);
+}
+
+const gfxFont::Metrics&
+gfxDWriteFont::GetHorizontalMetrics()
+{
+ return *mMetrics;
+}
+
+bool
+gfxDWriteFont::GetFakeMetricsForArialBlack(DWRITE_FONT_METRICS *aFontMetrics)
+{
+ gfxFontStyle style(mStyle);
+ style.weight = 700;
+ bool needsBold;
+
+ gfxFontEntry* fe =
+ gfxPlatformFontList::PlatformFontList()->
+ FindFontForFamily(NS_LITERAL_STRING("Arial"), &style, needsBold);
+ if (!fe || fe == mFontEntry) {
+ return false;
+ }
+
+ RefPtr<gfxFont> font = fe->FindOrMakeFont(&style, needsBold);
+ gfxDWriteFont *dwFont = static_cast<gfxDWriteFont*>(font.get());
+ dwFont->mFontFace->GetMetrics(aFontMetrics);
+
+ return true;
+}
+
+void
+gfxDWriteFont::ComputeMetrics(AntialiasOption anAAOption)
+{
+ DWRITE_FONT_METRICS fontMetrics;
+ if (!(mFontEntry->Weight() == 900 &&
+ !mFontEntry->IsUserFont() &&
+ mFontEntry->Name().EqualsLiteral("Arial Black") &&
+ GetFakeMetricsForArialBlack(&fontMetrics)))
+ {
+ mFontFace->GetMetrics(&fontMetrics);
+ }
+
+ if (mStyle.sizeAdjust >= 0.0) {
+ gfxFloat aspect = (gfxFloat)fontMetrics.xHeight /
+ fontMetrics.designUnitsPerEm;
+ mAdjustedSize = mStyle.GetAdjustedSize(aspect);
+ } else {
+ mAdjustedSize = mStyle.size;
+ }
+
+ // Note that GetMeasuringMode depends on mAdjustedSize
+ if ((anAAOption == gfxFont::kAntialiasDefault &&
+ UsingClearType() &&
+ GetMeasuringMode() == DWRITE_MEASURING_MODE_NATURAL) ||
+ anAAOption == gfxFont::kAntialiasSubpixel)
+ {
+ mUseSubpixelPositions = true;
+ // note that this may be reset to FALSE if we determine that a bitmap
+ // strike is going to be used
+ }
+
+ gfxDWriteFontEntry *fe =
+ static_cast<gfxDWriteFontEntry*>(mFontEntry.get());
+ if (fe->IsCJKFont() && HasBitmapStrikeForSize(NS_lround(mAdjustedSize))) {
+ mAdjustedSize = NS_lround(mAdjustedSize);
+ mUseSubpixelPositions = false;
+ // if we have bitmaps, we need to tell Cairo NOT to use subpixel AA,
+ // to avoid the manual-subpixel codepath in cairo-d2d-surface.cpp
+ // which fails to render bitmap glyphs (see bug 626299).
+ // This option will be passed to the cairo_dwrite_scaled_font_t
+ // after creation.
+ mAllowManualShowGlyphs = false;
+ }
+
+ mMetrics = new gfxFont::Metrics;
+ ::memset(mMetrics, 0, sizeof(*mMetrics));
+
+ mFUnitsConvFactor = float(mAdjustedSize / fontMetrics.designUnitsPerEm);
+
+ mMetrics->xHeight = fontMetrics.xHeight * mFUnitsConvFactor;
+ mMetrics->capHeight = fontMetrics.capHeight * mFUnitsConvFactor;
+
+ mMetrics->maxAscent = ceil(fontMetrics.ascent * mFUnitsConvFactor);
+ mMetrics->maxDescent = ceil(fontMetrics.descent * mFUnitsConvFactor);
+ mMetrics->maxHeight = mMetrics->maxAscent + mMetrics->maxDescent;
+
+ mMetrics->emHeight = mAdjustedSize;
+ mMetrics->emAscent = mMetrics->emHeight *
+ mMetrics->maxAscent / mMetrics->maxHeight;
+ mMetrics->emDescent = mMetrics->emHeight - mMetrics->emAscent;
+
+ mMetrics->maxAdvance = mAdjustedSize;
+
+ // try to get the true maxAdvance value from 'hhea'
+ gfxFontEntry::AutoTable hheaTable(GetFontEntry(),
+ TRUETYPE_TAG('h','h','e','a'));
+ if (hheaTable) {
+ uint32_t len;
+ const MetricsHeader* hhea =
+ reinterpret_cast<const MetricsHeader*>
+ (hb_blob_get_data(hheaTable, &len));
+ if (len >= sizeof(MetricsHeader)) {
+ mMetrics->maxAdvance =
+ uint16_t(hhea->advanceWidthMax) * mFUnitsConvFactor;
+ }
+ }
+
+ mMetrics->internalLeading = std::max(mMetrics->maxHeight - mMetrics->emHeight, 0.0);
+ mMetrics->externalLeading = ceil(fontMetrics.lineGap * mFUnitsConvFactor);
+
+ UINT32 ucs = L' ';
+ UINT16 glyph;
+ HRESULT hr = mFontFace->GetGlyphIndicesW(&ucs, 1, &glyph);
+ if (FAILED(hr)) {
+ mMetrics->spaceWidth = 0;
+ } else {
+ mSpaceGlyph = glyph;
+ mMetrics->spaceWidth = MeasureGlyphWidth(glyph);
+ }
+
+ // try to get aveCharWidth from the OS/2 table, fall back to measuring 'x'
+ // if the table is not available or if using hinted/pixel-snapped widths
+ if (mUseSubpixelPositions) {
+ mMetrics->aveCharWidth = 0;
+ gfxFontEntry::AutoTable os2Table(GetFontEntry(),
+ TRUETYPE_TAG('O','S','/','2'));
+ if (os2Table) {
+ uint32_t len;
+ const OS2Table* os2 =
+ reinterpret_cast<const OS2Table*>(hb_blob_get_data(os2Table, &len));
+ if (len >= 4) {
+ // Not checking against sizeof(mozilla::OS2Table) here because older
+ // versions of the table have different sizes; we only need the first
+ // two 16-bit fields here.
+ mMetrics->aveCharWidth =
+ int16_t(os2->xAvgCharWidth) * mFUnitsConvFactor;
+ }
+ }
+ }
+
+ if (mMetrics->aveCharWidth < 1) {
+ ucs = L'x';
+ if (SUCCEEDED(mFontFace->GetGlyphIndicesW(&ucs, 1, &glyph))) {
+ mMetrics->aveCharWidth = MeasureGlyphWidth(glyph);
+ }
+ if (mMetrics->aveCharWidth < 1) {
+ // Let's just assume the X is square.
+ mMetrics->aveCharWidth = fontMetrics.xHeight * mFUnitsConvFactor;
+ }
+ }
+
+ ucs = L'0';
+ if (SUCCEEDED(mFontFace->GetGlyphIndicesW(&ucs, 1, &glyph))) {
+ mMetrics->zeroOrAveCharWidth = MeasureGlyphWidth(glyph);
+ }
+ if (mMetrics->zeroOrAveCharWidth < 1) {
+ mMetrics->zeroOrAveCharWidth = mMetrics->aveCharWidth;
+ }
+
+ mMetrics->underlineOffset =
+ fontMetrics.underlinePosition * mFUnitsConvFactor;
+ mMetrics->underlineSize =
+ fontMetrics.underlineThickness * mFUnitsConvFactor;
+ mMetrics->strikeoutOffset =
+ fontMetrics.strikethroughPosition * mFUnitsConvFactor;
+ mMetrics->strikeoutSize =
+ fontMetrics.strikethroughThickness * mFUnitsConvFactor;
+
+ SanitizeMetrics(mMetrics, GetFontEntry()->mIsBadUnderlineFont);
+
+#if 0
+ printf("Font: %p (%s) size: %f\n", this,
+ NS_ConvertUTF16toUTF8(GetName()).get(), mStyle.size);
+ printf(" emHeight: %f emAscent: %f emDescent: %f\n", mMetrics->emHeight, mMetrics->emAscent, mMetrics->emDescent);
+ printf(" maxAscent: %f maxDescent: %f maxAdvance: %f\n", mMetrics->maxAscent, mMetrics->maxDescent, mMetrics->maxAdvance);
+ printf(" internalLeading: %f externalLeading: %f\n", mMetrics->internalLeading, mMetrics->externalLeading);
+ printf(" spaceWidth: %f aveCharWidth: %f zeroOrAve: %f\n",
+ mMetrics->spaceWidth, mMetrics->aveCharWidth, mMetrics->zeroOrAveCharWidth);
+ printf(" xHeight: %f capHeight: %f\n", mMetrics->xHeight, mMetrics->capHeight);
+ printf(" uOff: %f uSize: %f stOff: %f stSize: %f\n",
+ mMetrics->underlineOffset, mMetrics->underlineSize, mMetrics->strikeoutOffset, mMetrics->strikeoutSize);
+#endif
+}
+
+using namespace mozilla; // for AutoSwap_* types
+
+struct EBLCHeader {
+ AutoSwap_PRUint32 version;
+ AutoSwap_PRUint32 numSizes;
+};
+
+struct SbitLineMetrics {
+ int8_t ascender;
+ int8_t descender;
+ uint8_t widthMax;
+ int8_t caretSlopeNumerator;
+ int8_t caretSlopeDenominator;
+ int8_t caretOffset;
+ int8_t minOriginSB;
+ int8_t minAdvanceSB;
+ int8_t maxBeforeBL;
+ int8_t minAfterBL;
+ int8_t pad1;
+ int8_t pad2;
+};
+
+struct BitmapSizeTable {
+ AutoSwap_PRUint32 indexSubTableArrayOffset;
+ AutoSwap_PRUint32 indexTablesSize;
+ AutoSwap_PRUint32 numberOfIndexSubTables;
+ AutoSwap_PRUint32 colorRef;
+ SbitLineMetrics hori;
+ SbitLineMetrics vert;
+ AutoSwap_PRUint16 startGlyphIndex;
+ AutoSwap_PRUint16 endGlyphIndex;
+ uint8_t ppemX;
+ uint8_t ppemY;
+ uint8_t bitDepth;
+ uint8_t flags;
+};
+
+typedef EBLCHeader EBSCHeader;
+
+struct BitmapScaleTable {
+ SbitLineMetrics hori;
+ SbitLineMetrics vert;
+ uint8_t ppemX;
+ uint8_t ppemY;
+ uint8_t substitutePpemX;
+ uint8_t substitutePpemY;
+};
+
+bool
+gfxDWriteFont::HasBitmapStrikeForSize(uint32_t aSize)
+{
+ uint8_t *tableData;
+ uint32_t len;
+ void *tableContext;
+ BOOL exists;
+ HRESULT hr =
+ mFontFace->TryGetFontTable(DWRITE_MAKE_OPENTYPE_TAG('E', 'B', 'L', 'C'),
+ (const void**)&tableData, &len,
+ &tableContext, &exists);
+ if (FAILED(hr)) {
+ return false;
+ }
+
+ bool hasStrike = false;
+ // not really a loop, but this lets us use 'break' to skip out of the block
+ // as soon as we know the answer, and skips it altogether if the table is
+ // not present
+ while (exists) {
+ if (len < sizeof(EBLCHeader)) {
+ break;
+ }
+ const EBLCHeader *hdr = reinterpret_cast<const EBLCHeader*>(tableData);
+ if (hdr->version != 0x00020000) {
+ break;
+ }
+ uint32_t numSizes = hdr->numSizes;
+ if (numSizes > 0xffff) { // sanity-check, prevent overflow below
+ break;
+ }
+ if (len < sizeof(EBLCHeader) + numSizes * sizeof(BitmapSizeTable)) {
+ break;
+ }
+ const BitmapSizeTable *sizeTable =
+ reinterpret_cast<const BitmapSizeTable*>(hdr + 1);
+ for (uint32_t i = 0; i < numSizes; ++i, ++sizeTable) {
+ if (sizeTable->ppemX == aSize && sizeTable->ppemY == aSize) {
+ // we ignore a strike that contains fewer than 4 glyphs,
+ // as that probably indicates a font such as Courier New
+ // that provides bitmaps ONLY for the "shading" characters
+ // U+2591..2593
+ hasStrike = (uint16_t(sizeTable->endGlyphIndex) >=
+ uint16_t(sizeTable->startGlyphIndex) + 3);
+ break;
+ }
+ }
+ // if we reach here, we didn't find a strike; unconditionally break
+ // out of the while-loop block
+ break;
+ }
+ mFontFace->ReleaseFontTable(tableContext);
+
+ if (hasStrike) {
+ return true;
+ }
+
+ // if we didn't find a real strike, check if the font calls for scaling
+ // another bitmap to this size
+ hr = mFontFace->TryGetFontTable(DWRITE_MAKE_OPENTYPE_TAG('E', 'B', 'S', 'C'),
+ (const void**)&tableData, &len,
+ &tableContext, &exists);
+ if (FAILED(hr)) {
+ return false;
+ }
+
+ while (exists) {
+ if (len < sizeof(EBSCHeader)) {
+ break;
+ }
+ const EBSCHeader *hdr = reinterpret_cast<const EBSCHeader*>(tableData);
+ if (hdr->version != 0x00020000) {
+ break;
+ }
+ uint32_t numSizes = hdr->numSizes;
+ if (numSizes > 0xffff) {
+ break;
+ }
+ if (len < sizeof(EBSCHeader) + numSizes * sizeof(BitmapScaleTable)) {
+ break;
+ }
+ const BitmapScaleTable *scaleTable =
+ reinterpret_cast<const BitmapScaleTable*>(hdr + 1);
+ for (uint32_t i = 0; i < numSizes; ++i, ++scaleTable) {
+ if (scaleTable->ppemX == aSize && scaleTable->ppemY == aSize) {
+ hasStrike = true;
+ break;
+ }
+ }
+ break;
+ }
+ mFontFace->ReleaseFontTable(tableContext);
+
+ return hasStrike;
+}
+
+uint32_t
+gfxDWriteFont::GetSpaceGlyph()
+{
+ return mSpaceGlyph;
+}
+
+bool
+gfxDWriteFont::SetupCairoFont(DrawTarget* aDrawTarget)
+{
+ cairo_scaled_font_t *scaledFont = GetCairoScaledFont();
+ if (cairo_scaled_font_status(scaledFont) != CAIRO_STATUS_SUCCESS) {
+ // Don't cairo_set_scaled_font as that would propagate the error to
+ // the cairo_t, precluding any further drawing.
+ return false;
+ }
+ cairo_set_scaled_font(gfxFont::RefCairo(aDrawTarget), scaledFont);
+ return true;
+}
+
+bool
+gfxDWriteFont::IsValid() const
+{
+ return mFontFace != nullptr;
+}
+
+IDWriteFontFace*
+gfxDWriteFont::GetFontFace()
+{
+ return mFontFace.get();
+}
+
+cairo_font_face_t *
+gfxDWriteFont::CairoFontFace()
+{
+ if (!mCairoFontFace) {
+#ifdef CAIRO_HAS_DWRITE_FONT
+ mCairoFontFace =
+ cairo_dwrite_font_face_create_for_dwrite_fontface(
+ ((gfxDWriteFontEntry*)mFontEntry.get())->mFont, mFontFace);
+#endif
+ }
+ return mCairoFontFace;
+}
+
+
+cairo_scaled_font_t *
+gfxDWriteFont::GetCairoScaledFont()
+{
+ if (!mScaledFont) {
+ cairo_matrix_t sizeMatrix;
+ cairo_matrix_t identityMatrix;
+
+ cairo_matrix_init_scale(&sizeMatrix, mAdjustedSize, mAdjustedSize);
+ cairo_matrix_init_identity(&identityMatrix);
+
+ cairo_font_options_t *fontOptions = cairo_font_options_create();
+ if (mNeedsOblique) {
+ double skewfactor = OBLIQUE_SKEW_FACTOR;
+
+ cairo_matrix_t style;
+ cairo_matrix_init(&style,
+ 1, //xx
+ 0, //yx
+ -1 * skewfactor, //xy
+ 1, //yy
+ 0, //x0
+ 0); //y0
+ cairo_matrix_multiply(&sizeMatrix, &sizeMatrix, &style);
+ }
+
+ if (mAntialiasOption != kAntialiasDefault) {
+ cairo_font_options_set_antialias(fontOptions,
+ GetCairoAntialiasOption(mAntialiasOption));
+ }
+
+ mScaledFont = cairo_scaled_font_create(CairoFontFace(),
+ &sizeMatrix,
+ &identityMatrix,
+ fontOptions);
+ cairo_font_options_destroy(fontOptions);
+
+ cairo_dwrite_scaled_font_allow_manual_show_glyphs(mScaledFont,
+ mAllowManualShowGlyphs);
+
+ cairo_dwrite_scaled_font_set_force_GDI_classic(mScaledFont,
+ GetForceGDIClassic());
+ }
+
+ NS_ASSERTION(mAdjustedSize == 0.0 ||
+ cairo_scaled_font_status(mScaledFont)
+ == CAIRO_STATUS_SUCCESS,
+ "Failed to make scaled font");
+
+ return mScaledFont;
+}
+
+gfxFont::RunMetrics
+gfxDWriteFont::Measure(const gfxTextRun* aTextRun,
+ uint32_t aStart, uint32_t aEnd,
+ BoundingBoxType aBoundingBoxType,
+ DrawTarget* aRefDrawTarget,
+ Spacing* aSpacing,
+ uint16_t aOrientation)
+{
+ gfxFont::RunMetrics metrics =
+ gfxFont::Measure(aTextRun, aStart, aEnd, aBoundingBoxType,
+ aRefDrawTarget, aSpacing, aOrientation);
+
+ // if aBoundingBoxType is LOOSE_INK_EXTENTS
+ // and the underlying cairo font may be antialiased,
+ // we can't trust Windows to have considered all the pixels
+ // so we need to add "padding" to the bounds.
+ // (see bugs 475968, 439831, compare also bug 445087)
+ if (aBoundingBoxType == LOOSE_INK_EXTENTS &&
+ mAntialiasOption != kAntialiasNone &&
+ GetMeasuringMode() == DWRITE_MEASURING_MODE_GDI_CLASSIC &&
+ metrics.mBoundingBox.width > 0) {
+ metrics.mBoundingBox.x -= aTextRun->GetAppUnitsPerDevUnit();
+ metrics.mBoundingBox.width += aTextRun->GetAppUnitsPerDevUnit() * 3;
+ }
+
+ return metrics;
+}
+
+bool
+gfxDWriteFont::ProvidesGlyphWidths() const
+{
+ return !mUseSubpixelPositions ||
+ (mFontFace->GetSimulations() & DWRITE_FONT_SIMULATIONS_BOLD);
+}
+
+int32_t
+gfxDWriteFont::GetGlyphWidth(DrawTarget& aDrawTarget, uint16_t aGID)
+{
+ if (!mGlyphWidths) {
+ mGlyphWidths = MakeUnique<nsDataHashtable<nsUint32HashKey,int32_t>>(128);
+ }
+
+ int32_t width = -1;
+ if (mGlyphWidths->Get(aGID, &width)) {
+ return width;
+ }
+
+ width = NS_lround(MeasureGlyphWidth(aGID) * 65536.0);
+ mGlyphWidths->Put(aGID, width);
+ return width;
+}
+
+already_AddRefed<GlyphRenderingOptions>
+gfxDWriteFont::GetGlyphRenderingOptions(const TextRunDrawParams* aRunParams)
+{
+ if (UsingClearType()) {
+ return Factory::CreateDWriteGlyphRenderingOptions(
+ gfxWindowsPlatform::GetPlatform()->GetRenderingParams(GetForceGDIClassic() ?
+ gfxWindowsPlatform::TEXT_RENDERING_GDI_CLASSIC : gfxWindowsPlatform::TEXT_RENDERING_NORMAL));
+ } else {
+ return Factory::CreateDWriteGlyphRenderingOptions(gfxWindowsPlatform::GetPlatform()->
+ GetRenderingParams(gfxWindowsPlatform::TEXT_RENDERING_NO_CLEARTYPE));
+ }
+}
+
+bool
+gfxDWriteFont::GetForceGDIClassic()
+{
+ return static_cast<gfxDWriteFontEntry*>(mFontEntry.get())->GetForceGDIClassic() &&
+ cairo_dwrite_get_cleartype_rendering_mode() < 0 &&
+ GetAdjustedSize() <=
+ gfxDWriteFontList::PlatformFontList()->GetForceGDIClassicMaxFontSize();
+}
+
+DWRITE_MEASURING_MODE
+gfxDWriteFont::GetMeasuringMode()
+{
+ return GetForceGDIClassic()
+ ? DWRITE_MEASURING_MODE_GDI_CLASSIC
+ : gfxWindowsPlatform::GetPlatform()->DWriteMeasuringMode();
+}
+
+gfxFloat
+gfxDWriteFont::MeasureGlyphWidth(uint16_t aGlyph)
+{
+ DWRITE_GLYPH_METRICS metrics;
+ HRESULT hr;
+ if (mUseSubpixelPositions) {
+ hr = mFontFace->GetDesignGlyphMetrics(&aGlyph, 1, &metrics, FALSE);
+ if (SUCCEEDED(hr)) {
+ return metrics.advanceWidth * mFUnitsConvFactor;
+ }
+ } else {
+ hr = mFontFace->GetGdiCompatibleGlyphMetrics(
+ FLOAT(mAdjustedSize), 1.0f, nullptr,
+ GetMeasuringMode() == DWRITE_MEASURING_MODE_GDI_NATURAL,
+ &aGlyph, 1, &metrics, FALSE);
+ if (SUCCEEDED(hr)) {
+ return NS_lround(metrics.advanceWidth * mFUnitsConvFactor);
+ }
+ }
+ return 0;
+}
+
+void
+gfxDWriteFont::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
+ FontCacheSizes* aSizes) const
+{
+ gfxFont::AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
+ aSizes->mFontInstances += aMallocSizeOf(mMetrics);
+ if (mGlyphWidths) {
+ aSizes->mFontInstances +=
+ mGlyphWidths->ShallowSizeOfIncludingThis(aMallocSizeOf);
+ }
+}
+
+void
+gfxDWriteFont::AddSizeOfIncludingThis(MallocSizeOf aMallocSizeOf,
+ FontCacheSizes* aSizes) const
+{
+ aSizes->mFontInstances += aMallocSizeOf(this);
+ AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
+}
+
+already_AddRefed<ScaledFont>
+gfxDWriteFont::GetScaledFont(mozilla::gfx::DrawTarget *aTarget)
+{
+ bool wantCairo = aTarget->GetBackendType() == BackendType::CAIRO;
+ if (mAzureScaledFont && mAzureScaledFontIsCairo == wantCairo) {
+ RefPtr<ScaledFont> scaledFont(mAzureScaledFont);
+ return scaledFont.forget();
+ }
+
+ NativeFont nativeFont;
+ nativeFont.mType = NativeFontType::DWRITE_FONT_FACE;
+ nativeFont.mFont = GetFontFace();
+
+ if (wantCairo) {
+ mAzureScaledFont = Factory::CreateScaledFontWithCairo(nativeFont,
+ GetAdjustedSize(),
+ GetCairoScaledFont());
+ } else if (aTarget->GetBackendType() == BackendType::SKIA) {
+ gfxDWriteFontEntry *fe =
+ static_cast<gfxDWriteFontEntry*>(mFontEntry.get());
+ bool useEmbeddedBitmap = (fe->IsCJKFont() && HasBitmapStrikeForSize(NS_lround(mAdjustedSize)));
+
+ const gfxFontStyle* fontStyle = GetStyle();
+ mAzureScaledFont =
+ Factory::CreateScaledFontForDWriteFont(mFontFace, fontStyle,
+ GetAdjustedSize(),
+ useEmbeddedBitmap,
+ GetForceGDIClassic());
+ } else {
+ mAzureScaledFont = Factory::CreateScaledFontForNativeFont(nativeFont,
+ GetAdjustedSize());
+ }
+
+ mAzureScaledFontIsCairo = wantCairo;
+
+ RefPtr<ScaledFont> scaledFont(mAzureScaledFont);
+ return scaledFont.forget();
+}