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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/gfxTextRun.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/thebes/gfxTextRun.cpp')
-rw-r--r--gfx/thebes/gfxTextRun.cpp3214
1 files changed, 3214 insertions, 0 deletions
diff --git a/gfx/thebes/gfxTextRun.cpp b/gfx/thebes/gfxTextRun.cpp
new file mode 100644
index 000000000..6718eed01
--- /dev/null
+++ b/gfx/thebes/gfxTextRun.cpp
@@ -0,0 +1,3214 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=4 et sw=4 tw=80: */
+/* 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 "gfxTextRun.h"
+#include "gfxGlyphExtents.h"
+#include "gfxPlatformFontList.h"
+#include "gfxUserFontSet.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/PathHelpers.h"
+#include "mozilla/Sprintf.h"
+#include "nsGkAtoms.h"
+#include "nsILanguageAtomService.h"
+#include "nsServiceManagerUtils.h"
+
+#include "gfxContext.h"
+#include "gfxFontConstants.h"
+#include "gfxFontMissingGlyphs.h"
+#include "gfxScriptItemizer.h"
+#include "nsUnicodeProperties.h"
+#include "nsUnicodeRange.h"
+#include "nsStyleConsts.h"
+#include "mozilla/Likely.h"
+#include "gfx2DGlue.h"
+#include "mozilla/gfx/Logging.h" // for gfxCriticalError
+#include "mozilla/UniquePtr.h"
+
+#if defined(MOZ_WIDGET_GTK)
+#include "gfxPlatformGtk.h" // xxx - for UseFcFontList
+#endif
+
+#ifdef XP_WIN
+#include "gfxWindowsPlatform.h"
+#endif
+
+#include "cairo.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::unicode;
+using mozilla::services::GetObserverService;
+
+static const char16_t kEllipsisChar[] = { 0x2026, 0x0 };
+static const char16_t kASCIIPeriodsChar[] = { '.', '.', '.', 0x0 };
+
+#ifdef DEBUG_roc
+#define DEBUG_TEXT_RUN_STORAGE_METRICS
+#endif
+
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+extern uint32_t gTextRunStorageHighWaterMark;
+extern uint32_t gTextRunStorage;
+extern uint32_t gFontCount;
+extern uint32_t gGlyphExtentsCount;
+extern uint32_t gGlyphExtentsWidthsTotalSize;
+extern uint32_t gGlyphExtentsSetupEagerSimple;
+extern uint32_t gGlyphExtentsSetupEagerTight;
+extern uint32_t gGlyphExtentsSetupLazyTight;
+extern uint32_t gGlyphExtentsSetupFallBackToTight;
+#endif
+
+bool
+gfxTextRun::GlyphRunIterator::NextRun() {
+ if (mNextIndex >= mTextRun->mGlyphRuns.Length())
+ return false;
+ mGlyphRun = &mTextRun->mGlyphRuns[mNextIndex];
+ if (mGlyphRun->mCharacterOffset >= mEndOffset)
+ return false;
+
+ mStringStart = std::max(mStartOffset, mGlyphRun->mCharacterOffset);
+ uint32_t last = mNextIndex + 1 < mTextRun->mGlyphRuns.Length()
+ ? mTextRun->mGlyphRuns[mNextIndex + 1].mCharacterOffset : mTextRun->GetLength();
+ mStringEnd = std::min(mEndOffset, last);
+
+ ++mNextIndex;
+ return true;
+}
+
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+static void
+AccountStorageForTextRun(gfxTextRun *aTextRun, int32_t aSign)
+{
+ // Ignores detailed glyphs... we don't know when those have been constructed
+ // Also ignores gfxSkipChars dynamic storage (which won't be anything
+ // for preformatted text)
+ // Also ignores GlyphRun array, again because it hasn't been constructed
+ // by the time this gets called. If there's only one glyphrun that's stored
+ // directly in the textrun anyway so no additional overhead.
+ uint32_t length = aTextRun->GetLength();
+ int32_t bytes = length * sizeof(gfxTextRun::CompressedGlyph);
+ bytes += sizeof(gfxTextRun);
+ gTextRunStorage += bytes*aSign;
+ gTextRunStorageHighWaterMark = std::max(gTextRunStorageHighWaterMark, gTextRunStorage);
+}
+#endif
+
+static bool
+NeedsGlyphExtents(gfxTextRun *aTextRun)
+{
+ if (aTextRun->GetFlags() & gfxTextRunFactory::TEXT_NEED_BOUNDING_BOX)
+ return true;
+ uint32_t numRuns;
+ const gfxTextRun::GlyphRun *glyphRuns = aTextRun->GetGlyphRuns(&numRuns);
+ for (uint32_t i = 0; i < numRuns; ++i) {
+ if (glyphRuns[i].mFont->GetFontEntry()->IsUserFont())
+ return true;
+ }
+ return false;
+}
+
+// Helper for textRun creation to preallocate storage for glyph records;
+// this function returns a pointer to the newly-allocated glyph storage.
+// Returns nullptr if allocation fails.
+void *
+gfxTextRun::AllocateStorageForTextRun(size_t aSize, uint32_t aLength)
+{
+ // Allocate the storage we need, returning nullptr on failure rather than
+ // throwing an exception (because web content can create huge runs).
+ void *storage = malloc(aSize + aLength * sizeof(CompressedGlyph));
+ if (!storage) {
+ NS_WARNING("failed to allocate storage for text run!");
+ return nullptr;
+ }
+
+ // Initialize the glyph storage (beyond aSize) to zero
+ memset(reinterpret_cast<char*>(storage) + aSize, 0,
+ aLength * sizeof(CompressedGlyph));
+
+ return storage;
+}
+
+already_AddRefed<gfxTextRun>
+gfxTextRun::Create(const gfxTextRunFactory::Parameters *aParams,
+ uint32_t aLength, gfxFontGroup *aFontGroup, uint32_t aFlags)
+{
+ void *storage = AllocateStorageForTextRun(sizeof(gfxTextRun), aLength);
+ if (!storage) {
+ return nullptr;
+ }
+
+ RefPtr<gfxTextRun> result = new (storage) gfxTextRun(aParams, aLength,
+ aFontGroup, aFlags);
+ return result.forget();
+}
+
+gfxTextRun::gfxTextRun(const gfxTextRunFactory::Parameters *aParams,
+ uint32_t aLength, gfxFontGroup *aFontGroup, uint32_t aFlags)
+ : gfxShapedText(aLength, aFlags, aParams->mAppUnitsPerDevUnit)
+ , mUserData(aParams->mUserData)
+ , mFontGroup(aFontGroup)
+ , mReleasedFontGroup(false)
+ , mShapingState(eShapingState_Normal)
+{
+ NS_ASSERTION(mAppUnitsPerDevUnit > 0, "Invalid app unit scale");
+ MOZ_COUNT_CTOR(gfxTextRun);
+ NS_ADDREF(mFontGroup);
+
+#ifndef RELEASE_OR_BETA
+ gfxTextPerfMetrics *tp = aFontGroup->GetTextPerfMetrics();
+ if (tp) {
+ tp->current.textrunConst++;
+ }
+#endif
+
+ mCharacterGlyphs = reinterpret_cast<CompressedGlyph*>(this + 1);
+
+ if (aParams->mSkipChars) {
+ mSkipChars.TakeFrom(aParams->mSkipChars);
+ }
+
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+ AccountStorageForTextRun(this, 1);
+#endif
+
+ mSkipDrawing = mFontGroup->ShouldSkipDrawing();
+}
+
+gfxTextRun::~gfxTextRun()
+{
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+ AccountStorageForTextRun(this, -1);
+#endif
+#ifdef DEBUG
+ // Make it easy to detect a dead text run
+ mFlags = 0xFFFFFFFF;
+#endif
+
+ // The cached ellipsis textrun (if any) in a fontgroup will have already
+ // been told to release its reference to the group, so we mustn't do that
+ // again here.
+ if (!mReleasedFontGroup) {
+#ifndef RELEASE_OR_BETA
+ gfxTextPerfMetrics *tp = mFontGroup->GetTextPerfMetrics();
+ if (tp) {
+ tp->current.textrunDestr++;
+ }
+#endif
+ NS_RELEASE(mFontGroup);
+ }
+
+ MOZ_COUNT_DTOR(gfxTextRun);
+}
+
+void
+gfxTextRun::ReleaseFontGroup()
+{
+ NS_ASSERTION(!mReleasedFontGroup, "doubly released!");
+ NS_RELEASE(mFontGroup);
+ mReleasedFontGroup = true;
+}
+
+bool
+gfxTextRun::SetPotentialLineBreaks(Range aRange, const uint8_t* aBreakBefore)
+{
+ NS_ASSERTION(aRange.end <= GetLength(), "Overflow");
+
+ uint32_t changed = 0;
+ CompressedGlyph* cg = mCharacterGlyphs + aRange.start;
+ const CompressedGlyph* const end = cg + aRange.Length();
+ while (cg < end) {
+ uint8_t canBreak = *aBreakBefore++;
+ if (canBreak && !cg->IsClusterStart()) {
+ // XXX If we replace the line-breaker with one based more closely
+ // on UAX#14 (e.g. using ICU), this may not be needed any more.
+ // Avoid possible breaks inside a cluster, EXCEPT when the previous
+ // character was a space (compare UAX#14 rules LB9, LB10).
+ if (cg == mCharacterGlyphs || !(cg - 1)->CharIsSpace()) {
+ canBreak = CompressedGlyph::FLAG_BREAK_TYPE_NONE;
+ }
+ }
+ changed |= cg->SetCanBreakBefore(canBreak);
+ ++cg;
+ }
+ return changed != 0;
+}
+
+gfxTextRun::LigatureData
+gfxTextRun::ComputeLigatureData(Range aPartRange,
+ PropertyProvider *aProvider) const
+{
+ NS_ASSERTION(aPartRange.start < aPartRange.end,
+ "Computing ligature data for empty range");
+ NS_ASSERTION(aPartRange.end <= GetLength(), "Character length overflow");
+
+ LigatureData result;
+ const CompressedGlyph *charGlyphs = mCharacterGlyphs;
+
+ uint32_t i;
+ for (i = aPartRange.start; !charGlyphs[i].IsLigatureGroupStart(); --i) {
+ NS_ASSERTION(i > 0, "Ligature at the start of the run??");
+ }
+ result.mRange.start = i;
+ for (i = aPartRange.start + 1;
+ i < GetLength() && !charGlyphs[i].IsLigatureGroupStart(); ++i) {
+ }
+ result.mRange.end = i;
+
+ int32_t ligatureWidth = GetAdvanceForGlyphs(result.mRange);
+ // Count the number of started clusters we have seen
+ uint32_t totalClusterCount = 0;
+ uint32_t partClusterIndex = 0;
+ uint32_t partClusterCount = 0;
+ for (i = result.mRange.start; i < result.mRange.end; ++i) {
+ // Treat the first character of the ligature as the start of a
+ // cluster for our purposes of allocating ligature width to its
+ // characters.
+ if (i == result.mRange.start || charGlyphs[i].IsClusterStart()) {
+ ++totalClusterCount;
+ if (i < aPartRange.start) {
+ ++partClusterIndex;
+ } else if (i < aPartRange.end) {
+ ++partClusterCount;
+ }
+ }
+ }
+ NS_ASSERTION(totalClusterCount > 0, "Ligature involving no clusters??");
+ result.mPartAdvance = partClusterIndex * (ligatureWidth / totalClusterCount);
+ result.mPartWidth = partClusterCount * (ligatureWidth / totalClusterCount);
+
+ // Any rounding errors are apportioned to the final part of the ligature,
+ // so that measuring all parts of a ligature and summing them is equal to
+ // the ligature width.
+ if (aPartRange.end == result.mRange.end) {
+ gfxFloat allParts = totalClusterCount * (ligatureWidth / totalClusterCount);
+ result.mPartWidth += ligatureWidth - allParts;
+ }
+
+ if (partClusterCount == 0) {
+ // nothing to draw
+ result.mClipBeforePart = result.mClipAfterPart = true;
+ } else {
+ // Determine whether we should clip before or after this part when
+ // drawing its slice of the ligature.
+ // We need to clip before the part if any cluster is drawn before
+ // this part.
+ result.mClipBeforePart = partClusterIndex > 0;
+ // We need to clip after the part if any cluster is drawn after
+ // this part.
+ result.mClipAfterPart = partClusterIndex + partClusterCount < totalClusterCount;
+ }
+
+ if (aProvider && (mFlags & gfxTextRunFactory::TEXT_ENABLE_SPACING)) {
+ gfxFont::Spacing spacing;
+ if (aPartRange.start == result.mRange.start) {
+ aProvider->GetSpacing(
+ Range(aPartRange.start, aPartRange.start + 1), &spacing);
+ result.mPartWidth += spacing.mBefore;
+ }
+ if (aPartRange.end == result.mRange.end) {
+ aProvider->GetSpacing(
+ Range(aPartRange.end - 1, aPartRange.end), &spacing);
+ result.mPartWidth += spacing.mAfter;
+ }
+ }
+
+ return result;
+}
+
+gfxFloat
+gfxTextRun::ComputePartialLigatureWidth(Range aPartRange,
+ PropertyProvider *aProvider) const
+{
+ if (aPartRange.start >= aPartRange.end)
+ return 0;
+ LigatureData data = ComputeLigatureData(aPartRange, aProvider);
+ return data.mPartWidth;
+}
+
+int32_t
+gfxTextRun::GetAdvanceForGlyphs(Range aRange) const
+{
+ int32_t advance = 0;
+ for (auto i = aRange.start; i < aRange.end; ++i) {
+ advance += GetAdvanceForGlyph(i);
+ }
+ return advance;
+}
+
+static void
+GetAdjustedSpacing(const gfxTextRun *aTextRun, gfxTextRun::Range aRange,
+ gfxTextRun::PropertyProvider *aProvider,
+ gfxTextRun::PropertyProvider::Spacing *aSpacing)
+{
+ if (aRange.start >= aRange.end)
+ return;
+
+ aProvider->GetSpacing(aRange, aSpacing);
+
+#ifdef DEBUG
+ // Check to see if we have spacing inside ligatures
+
+ const gfxTextRun::CompressedGlyph *charGlyphs = aTextRun->GetCharacterGlyphs();
+ uint32_t i;
+
+ for (i = aRange.start; i < aRange.end; ++i) {
+ if (!charGlyphs[i].IsLigatureGroupStart()) {
+ NS_ASSERTION(i == aRange.start ||
+ aSpacing[i - aRange.start].mBefore == 0,
+ "Before-spacing inside a ligature!");
+ NS_ASSERTION(i - 1 <= aRange.start ||
+ aSpacing[i - 1 - aRange.start].mAfter == 0,
+ "After-spacing inside a ligature!");
+ }
+ }
+#endif
+}
+
+bool
+gfxTextRun::GetAdjustedSpacingArray(Range aRange, PropertyProvider *aProvider,
+ Range aSpacingRange,
+ nsTArray<PropertyProvider::Spacing>*
+ aSpacing) const
+{
+ if (!aProvider || !(mFlags & gfxTextRunFactory::TEXT_ENABLE_SPACING))
+ return false;
+ if (!aSpacing->AppendElements(aRange.Length()))
+ return false;
+ auto spacingOffset = aSpacingRange.start - aRange.start;
+ memset(aSpacing->Elements(), 0, sizeof(gfxFont::Spacing) * spacingOffset);
+ GetAdjustedSpacing(this, aSpacingRange, aProvider,
+ aSpacing->Elements() + spacingOffset);
+ memset(aSpacing->Elements() + aSpacingRange.end - aRange.start, 0,
+ sizeof(gfxFont::Spacing) * (aRange.end - aSpacingRange.end));
+ return true;
+}
+
+void
+gfxTextRun::ShrinkToLigatureBoundaries(Range* aRange) const
+{
+ if (aRange->start >= aRange->end)
+ return;
+
+ const CompressedGlyph *charGlyphs = mCharacterGlyphs;
+
+ while (aRange->start < aRange->end &&
+ !charGlyphs[aRange->start].IsLigatureGroupStart()) {
+ ++aRange->start;
+ }
+ if (aRange->end < GetLength()) {
+ while (aRange->end > aRange->start &&
+ !charGlyphs[aRange->end].IsLigatureGroupStart()) {
+ --aRange->end;
+ }
+ }
+}
+
+void
+gfxTextRun::DrawGlyphs(gfxFont *aFont, Range aRange, gfxPoint *aPt,
+ PropertyProvider *aProvider, Range aSpacingRange,
+ TextRunDrawParams& aParams, uint16_t aOrientation) const
+{
+ AutoTArray<PropertyProvider::Spacing,200> spacingBuffer;
+ bool haveSpacing = GetAdjustedSpacingArray(aRange, aProvider,
+ aSpacingRange, &spacingBuffer);
+ aParams.spacing = haveSpacing ? spacingBuffer.Elements() : nullptr;
+ aFont->Draw(this, aRange.start, aRange.end, aPt, aParams, aOrientation);
+}
+
+static void
+ClipPartialLigature(const gfxTextRun* aTextRun,
+ gfxFloat *aStart, gfxFloat *aEnd,
+ gfxFloat aOrigin,
+ gfxTextRun::LigatureData *aLigature)
+{
+ if (aLigature->mClipBeforePart) {
+ if (aTextRun->IsRightToLeft()) {
+ *aEnd = std::min(*aEnd, aOrigin);
+ } else {
+ *aStart = std::max(*aStart, aOrigin);
+ }
+ }
+ if (aLigature->mClipAfterPart) {
+ gfxFloat endEdge =
+ aOrigin + aTextRun->GetDirection() * aLigature->mPartWidth;
+ if (aTextRun->IsRightToLeft()) {
+ *aStart = std::max(*aStart, endEdge);
+ } else {
+ *aEnd = std::min(*aEnd, endEdge);
+ }
+ }
+}
+
+void
+gfxTextRun::DrawPartialLigature(gfxFont *aFont, Range aRange,
+ gfxPoint *aPt, PropertyProvider *aProvider,
+ TextRunDrawParams& aParams,
+ uint16_t aOrientation) const
+{
+ if (aRange.start >= aRange.end) {
+ return;
+ }
+
+ // Draw partial ligature. We hack this by clipping the ligature.
+ LigatureData data = ComputeLigatureData(aRange, aProvider);
+ gfxRect clipExtents = aParams.context->GetClipExtents();
+ gfxFloat start, end;
+ if (aParams.isVerticalRun) {
+ start = clipExtents.Y() * mAppUnitsPerDevUnit;
+ end = clipExtents.YMost() * mAppUnitsPerDevUnit;
+ ClipPartialLigature(this, &start, &end, aPt->y, &data);
+ } else {
+ start = clipExtents.X() * mAppUnitsPerDevUnit;
+ end = clipExtents.XMost() * mAppUnitsPerDevUnit;
+ ClipPartialLigature(this, &start, &end, aPt->x, &data);
+ }
+
+ {
+ // use division here to ensure that when the rect is aligned on multiples
+ // of mAppUnitsPerDevUnit, we clip to true device unit boundaries.
+ // Also, make sure we snap the rectangle to device pixels.
+ Rect clipRect = aParams.isVerticalRun ?
+ Rect(clipExtents.X(), start / mAppUnitsPerDevUnit,
+ clipExtents.Width(), (end - start) / mAppUnitsPerDevUnit) :
+ Rect(start / mAppUnitsPerDevUnit, clipExtents.Y(),
+ (end - start) / mAppUnitsPerDevUnit, clipExtents.Height());
+ MaybeSnapToDevicePixels(clipRect, *aParams.dt, true);
+
+ aParams.context->Save();
+ aParams.context->Clip(clipRect);
+ }
+
+ gfxPoint pt;
+ if (aParams.isVerticalRun) {
+ pt = gfxPoint(aPt->x, aPt->y - aParams.direction * data.mPartAdvance);
+ } else {
+ pt = gfxPoint(aPt->x - aParams.direction * data.mPartAdvance, aPt->y);
+ }
+
+ DrawGlyphs(aFont, data.mRange, &pt,
+ aProvider, aRange, aParams, aOrientation);
+ aParams.context->Restore();
+
+ if (aParams.isVerticalRun) {
+ aPt->y += aParams.direction * data.mPartWidth;
+ } else {
+ aPt->x += aParams.direction * data.mPartWidth;
+ }
+}
+
+// Returns true if a glyph run is using a font with synthetic bolding enabled,
+// or a color font (COLR/SVG/sbix/CBDT), false otherwise. This is used to
+// check whether the text run needs to be explicitly composited in order to
+// support opacity.
+static bool
+HasSyntheticBoldOrColor(const gfxTextRun *aRun, gfxTextRun::Range aRange)
+{
+ gfxTextRun::GlyphRunIterator iter(aRun, aRange);
+ while (iter.NextRun()) {
+ gfxFont *font = iter.GetGlyphRun()->mFont;
+ if (font) {
+ if (font->IsSyntheticBold()) {
+ return true;
+ }
+ gfxFontEntry* fe = font->GetFontEntry();
+ if (fe->TryGetSVGData(font) || fe->TryGetColorGlyphs()) {
+ return true;
+ }
+#if defined(XP_MACOSX) // sbix fonts only supported via Core Text
+ if (fe->HasFontTable(TRUETYPE_TAG('s', 'b', 'i', 'x'))) {
+ return true;
+ }
+#endif
+ }
+ }
+ return false;
+}
+
+// Returns true if color is neither opaque nor transparent (i.e. alpha is not 0
+// or 1), and false otherwise. If true, aCurrentColorOut is set on output.
+static bool
+HasNonOpaqueNonTransparentColor(gfxContext *aContext, Color& aCurrentColorOut)
+{
+ if (aContext->GetDeviceColor(aCurrentColorOut)) {
+ if (0.f < aCurrentColorOut.a && aCurrentColorOut.a < 1.f) {
+ return true;
+ }
+ }
+ return false;
+}
+
+// helper class for double-buffering drawing with non-opaque color
+struct BufferAlphaColor {
+ explicit BufferAlphaColor(gfxContext *aContext)
+ : mContext(aContext)
+ {
+
+ }
+
+ ~BufferAlphaColor() {}
+
+ void PushSolidColor(const gfxRect& aBounds, const Color& aAlphaColor, uint32_t appsPerDevUnit)
+ {
+ mContext->Save();
+ mContext->NewPath();
+ mContext->Rectangle(gfxRect(aBounds.X() / appsPerDevUnit,
+ aBounds.Y() / appsPerDevUnit,
+ aBounds.Width() / appsPerDevUnit,
+ aBounds.Height() / appsPerDevUnit), true);
+ mContext->Clip();
+ mContext->SetColor(Color(aAlphaColor.r, aAlphaColor.g, aAlphaColor.b));
+ mContext->PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, aAlphaColor.a);
+ }
+
+ void PopAlpha()
+ {
+ // pop the text, using the color alpha as the opacity
+ mContext->PopGroupAndBlend();
+ mContext->Restore();
+ }
+
+ gfxContext *mContext;
+};
+
+void
+gfxTextRun::Draw(Range aRange, gfxPoint aPt, const DrawParams& aParams) const
+{
+ NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
+ NS_ASSERTION(aParams.drawMode == DrawMode::GLYPH_PATH ||
+ !(aParams.drawMode & DrawMode::GLYPH_PATH),
+ "GLYPH_PATH cannot be used with GLYPH_FILL, GLYPH_STROKE or GLYPH_STROKE_UNDERNEATH");
+ NS_ASSERTION(aParams.drawMode == DrawMode::GLYPH_PATH || !aParams.callbacks,
+ "callback must not be specified unless using GLYPH_PATH");
+
+ bool skipDrawing = mSkipDrawing;
+ if (aParams.drawMode & DrawMode::GLYPH_FILL) {
+ Color currentColor;
+ if (aParams.context->GetDeviceColor(currentColor) &&
+ currentColor.a == 0) {
+ skipDrawing = true;
+ }
+ }
+
+ gfxFloat direction = GetDirection();
+
+ if (skipDrawing) {
+ // We don't need to draw anything;
+ // but if the caller wants advance width, we need to compute it here
+ if (aParams.advanceWidth) {
+ gfxTextRun::Metrics metrics = MeasureText(
+ aRange, gfxFont::LOOSE_INK_EXTENTS,
+ aParams.context->GetDrawTarget(), aParams.provider);
+ *aParams.advanceWidth = metrics.mAdvanceWidth * direction;
+ }
+
+ // return without drawing
+ return;
+ }
+
+ // synthetic bolding draws glyphs twice ==> colors with opacity won't draw
+ // correctly unless first drawn without alpha
+ BufferAlphaColor syntheticBoldBuffer(aParams.context);
+ Color currentColor;
+ bool needToRestore = false;
+
+ if (aParams.drawMode & DrawMode::GLYPH_FILL &&
+ HasNonOpaqueNonTransparentColor(aParams.context, currentColor) &&
+ HasSyntheticBoldOrColor(this, aRange)) {
+ needToRestore = true;
+ // measure text, use the bounding box
+ gfxTextRun::Metrics metrics = MeasureText(
+ aRange, gfxFont::LOOSE_INK_EXTENTS,
+ aParams.context->GetDrawTarget(), aParams.provider);
+ metrics.mBoundingBox.MoveBy(aPt);
+ syntheticBoldBuffer.PushSolidColor(metrics.mBoundingBox, currentColor,
+ GetAppUnitsPerDevUnit());
+ }
+
+ // Set up parameters that will be constant across all glyph runs we need
+ // to draw, regardless of the font used.
+ TextRunDrawParams params;
+ params.context = aParams.context;
+ params.devPerApp = 1.0 / double(GetAppUnitsPerDevUnit());
+ params.isVerticalRun = IsVertical();
+ params.isRTL = IsRightToLeft();
+ params.direction = direction;
+ params.strokeOpts = aParams.strokeOpts;
+ params.textStrokeColor = aParams.textStrokeColor;
+ params.textStrokePattern = aParams.textStrokePattern;
+ params.drawOpts = aParams.drawOpts;
+ params.drawMode = aParams.drawMode;
+ params.callbacks = aParams.callbacks;
+ params.runContextPaint = aParams.contextPaint;
+ params.paintSVGGlyphs = !aParams.callbacks ||
+ aParams.callbacks->mShouldPaintSVGGlyphs;
+ params.dt = aParams.context->GetDrawTarget();
+ params.fontSmoothingBGColor =
+ aParams.context->GetFontSmoothingBackgroundColor();
+
+ GlyphRunIterator iter(this, aRange);
+ gfxFloat advance = 0.0;
+
+ while (iter.NextRun()) {
+ gfxFont *font = iter.GetGlyphRun()->mFont;
+ uint32_t start = iter.GetStringStart();
+ uint32_t end = iter.GetStringEnd();
+ Range ligatureRange(start, end);
+ ShrinkToLigatureBoundaries(&ligatureRange);
+
+ bool drawPartial = (aParams.drawMode & DrawMode::GLYPH_FILL) ||
+ (aParams.drawMode == DrawMode::GLYPH_PATH &&
+ aParams.callbacks);
+ gfxPoint origPt = aPt;
+
+ if (drawPartial) {
+ DrawPartialLigature(font, Range(start, ligatureRange.start),
+ &aPt, aParams.provider, params,
+ iter.GetGlyphRun()->mOrientation);
+ }
+
+ DrawGlyphs(font, ligatureRange, &aPt,
+ aParams.provider, ligatureRange, params,
+ iter.GetGlyphRun()->mOrientation);
+
+ if (drawPartial) {
+ DrawPartialLigature(font, Range(ligatureRange.end, end),
+ &aPt, aParams.provider, params,
+ iter.GetGlyphRun()->mOrientation);
+ }
+
+ if (params.isVerticalRun) {
+ advance += (aPt.y - origPt.y) * params.direction;
+ } else {
+ advance += (aPt.x - origPt.x) * params.direction;
+ }
+ }
+
+ // composite result when synthetic bolding used
+ if (needToRestore) {
+ syntheticBoldBuffer.PopAlpha();
+ }
+
+ if (aParams.advanceWidth) {
+ *aParams.advanceWidth = advance;
+ }
+}
+
+// This method is mostly parallel to Draw().
+void
+gfxTextRun::DrawEmphasisMarks(gfxContext *aContext, gfxTextRun* aMark,
+ gfxFloat aMarkAdvance, gfxPoint aPt,
+ Range aRange, PropertyProvider* aProvider) const
+{
+ MOZ_ASSERT(aRange.end <= GetLength());
+
+ EmphasisMarkDrawParams params;
+ params.context = aContext;
+ params.mark = aMark;
+ params.advance = aMarkAdvance;
+ params.direction = GetDirection();
+ params.isVertical = IsVertical();
+
+ gfxFloat& inlineCoord = params.isVertical ? aPt.y : aPt.x;
+ gfxFloat direction = params.direction;
+
+ GlyphRunIterator iter(this, aRange);
+ while (iter.NextRun()) {
+ gfxFont* font = iter.GetGlyphRun()->mFont;
+ uint32_t start = iter.GetStringStart();
+ uint32_t end = iter.GetStringEnd();
+ Range ligatureRange(start, end);
+ ShrinkToLigatureBoundaries(&ligatureRange);
+
+ inlineCoord += direction * ComputePartialLigatureWidth(
+ Range(start, ligatureRange.start), aProvider);
+
+ AutoTArray<PropertyProvider::Spacing, 200> spacingBuffer;
+ bool haveSpacing = GetAdjustedSpacingArray(
+ ligatureRange, aProvider, ligatureRange, &spacingBuffer);
+ params.spacing = haveSpacing ? spacingBuffer.Elements() : nullptr;
+ font->DrawEmphasisMarks(this, &aPt, ligatureRange.start,
+ ligatureRange.Length(), params);
+
+ inlineCoord += direction * ComputePartialLigatureWidth(
+ Range(ligatureRange.end, end), aProvider);
+ }
+}
+
+void
+gfxTextRun::AccumulateMetricsForRun(gfxFont *aFont, Range aRange,
+ gfxFont::BoundingBoxType aBoundingBoxType,
+ DrawTarget* aRefDrawTarget,
+ PropertyProvider *aProvider,
+ Range aSpacingRange,
+ uint16_t aOrientation,
+ Metrics *aMetrics) const
+{
+ AutoTArray<PropertyProvider::Spacing,200> spacingBuffer;
+ bool haveSpacing = GetAdjustedSpacingArray(aRange, aProvider,
+ aSpacingRange, &spacingBuffer);
+ Metrics metrics = aFont->Measure(this, aRange.start, aRange.end,
+ aBoundingBoxType, aRefDrawTarget,
+ haveSpacing ? spacingBuffer.Elements() : nullptr,
+ aOrientation);
+ aMetrics->CombineWith(metrics, IsRightToLeft());
+}
+
+void
+gfxTextRun::AccumulatePartialLigatureMetrics(gfxFont *aFont, Range aRange,
+ gfxFont::BoundingBoxType aBoundingBoxType, DrawTarget* aRefDrawTarget,
+ PropertyProvider *aProvider, uint16_t aOrientation,
+ Metrics *aMetrics) const
+{
+ if (aRange.start >= aRange.end)
+ return;
+
+ // Measure partial ligature. We hack this by clipping the metrics in the
+ // same way we clip the drawing.
+ LigatureData data = ComputeLigatureData(aRange, aProvider);
+
+ // First measure the complete ligature
+ Metrics metrics;
+ AccumulateMetricsForRun(aFont, data.mRange,
+ aBoundingBoxType, aRefDrawTarget,
+ aProvider, aRange, aOrientation, &metrics);
+
+ // Clip the bounding box to the ligature part
+ gfxFloat bboxLeft = metrics.mBoundingBox.X();
+ gfxFloat bboxRight = metrics.mBoundingBox.XMost();
+ // Where we are going to start "drawing" relative to our left baseline origin
+ gfxFloat origin = IsRightToLeft() ? metrics.mAdvanceWidth - data.mPartAdvance : 0;
+ ClipPartialLigature(this, &bboxLeft, &bboxRight, origin, &data);
+ metrics.mBoundingBox.x = bboxLeft;
+ metrics.mBoundingBox.width = bboxRight - bboxLeft;
+
+ // mBoundingBox is now relative to the left baseline origin for the entire
+ // ligature. Shift it left.
+ metrics.mBoundingBox.x -=
+ IsRightToLeft() ? metrics.mAdvanceWidth - (data.mPartAdvance + data.mPartWidth)
+ : data.mPartAdvance;
+ metrics.mAdvanceWidth = data.mPartWidth;
+
+ aMetrics->CombineWith(metrics, IsRightToLeft());
+}
+
+gfxTextRun::Metrics
+gfxTextRun::MeasureText(Range aRange,
+ gfxFont::BoundingBoxType aBoundingBoxType,
+ DrawTarget* aRefDrawTarget,
+ PropertyProvider *aProvider) const
+{
+ NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
+
+ Metrics accumulatedMetrics;
+ GlyphRunIterator iter(this, aRange);
+ while (iter.NextRun()) {
+ gfxFont *font = iter.GetGlyphRun()->mFont;
+ uint32_t start = iter.GetStringStart();
+ uint32_t end = iter.GetStringEnd();
+ Range ligatureRange(start, end);
+ ShrinkToLigatureBoundaries(&ligatureRange);
+
+ AccumulatePartialLigatureMetrics(
+ font, Range(start, ligatureRange.start),
+ aBoundingBoxType, aRefDrawTarget, aProvider,
+ iter.GetGlyphRun()->mOrientation, &accumulatedMetrics);
+
+ // XXX This sucks. We have to get glyph extents just so we can detect
+ // glyphs outside the font box, even when aBoundingBoxType is LOOSE,
+ // even though in almost all cases we could get correct results just
+ // by getting some ascent/descent from the font and using our stored
+ // advance widths.
+ AccumulateMetricsForRun(font,
+ ligatureRange, aBoundingBoxType,
+ aRefDrawTarget, aProvider, ligatureRange,
+ iter.GetGlyphRun()->mOrientation, &accumulatedMetrics);
+
+ AccumulatePartialLigatureMetrics(
+ font, Range(ligatureRange.end, end),
+ aBoundingBoxType, aRefDrawTarget, aProvider,
+ iter.GetGlyphRun()->mOrientation, &accumulatedMetrics);
+ }
+
+ return accumulatedMetrics;
+}
+
+#define MEASUREMENT_BUFFER_SIZE 100
+
+uint32_t
+gfxTextRun::BreakAndMeasureText(uint32_t aStart, uint32_t aMaxLength,
+ bool aLineBreakBefore, gfxFloat aWidth,
+ PropertyProvider *aProvider,
+ SuppressBreak aSuppressBreak,
+ gfxFloat *aTrimWhitespace,
+ bool aWhitespaceCanHang,
+ Metrics *aMetrics,
+ gfxFont::BoundingBoxType aBoundingBoxType,
+ DrawTarget* aRefDrawTarget,
+ bool *aUsedHyphenation,
+ uint32_t *aLastBreak,
+ bool aCanWordWrap,
+ gfxBreakPriority *aBreakPriority)
+{
+ aMaxLength = std::min(aMaxLength, GetLength() - aStart);
+
+ NS_ASSERTION(aStart + aMaxLength <= GetLength(), "Substring out of range");
+
+ Range bufferRange(aStart, aStart +
+ std::min<uint32_t>(aMaxLength, MEASUREMENT_BUFFER_SIZE));
+ PropertyProvider::Spacing spacingBuffer[MEASUREMENT_BUFFER_SIZE];
+ bool haveSpacing = aProvider && (mFlags & gfxTextRunFactory::TEXT_ENABLE_SPACING) != 0;
+ if (haveSpacing) {
+ GetAdjustedSpacing(this, bufferRange, aProvider, spacingBuffer);
+ }
+ bool hyphenBuffer[MEASUREMENT_BUFFER_SIZE];
+ bool haveHyphenation = aProvider &&
+ (aProvider->GetHyphensOption() == NS_STYLE_HYPHENS_AUTO ||
+ (aProvider->GetHyphensOption() == NS_STYLE_HYPHENS_MANUAL &&
+ (mFlags & gfxTextRunFactory::TEXT_ENABLE_HYPHEN_BREAKS) != 0));
+ if (haveHyphenation) {
+ aProvider->GetHyphenationBreaks(bufferRange, hyphenBuffer);
+ }
+
+ gfxFloat width = 0;
+ gfxFloat advance = 0;
+ // The number of space characters that can be trimmed or hang at a soft-wrap
+ uint32_t trimmableChars = 0;
+ // The amount of space removed by ignoring trimmableChars
+ gfxFloat trimmableAdvance = 0;
+ int32_t lastBreak = -1;
+ int32_t lastBreakTrimmableChars = -1;
+ gfxFloat lastBreakTrimmableAdvance = -1;
+ bool aborted = false;
+ uint32_t end = aStart + aMaxLength;
+ bool lastBreakUsedHyphenation = false;
+
+ Range ligatureRange(aStart, end);
+ ShrinkToLigatureBoundaries(&ligatureRange);
+
+ uint32_t i;
+ for (i = aStart; i < end; ++i) {
+ if (i >= bufferRange.end) {
+ // Fetch more spacing and hyphenation data
+ bufferRange.start = i;
+ bufferRange.end = std::min(aStart + aMaxLength,
+ i + MEASUREMENT_BUFFER_SIZE);
+ if (haveSpacing) {
+ GetAdjustedSpacing(this, bufferRange, aProvider, spacingBuffer);
+ }
+ if (haveHyphenation) {
+ aProvider->GetHyphenationBreaks(bufferRange, hyphenBuffer);
+ }
+ }
+
+ // There can't be a word-wrap break opportunity at the beginning of the
+ // line: if the width is too small for even one character to fit, it
+ // could be the first and last break opportunity on the line, and that
+ // would trigger an infinite loop.
+ if (aSuppressBreak != eSuppressAllBreaks &&
+ (aSuppressBreak != eSuppressInitialBreak || i > aStart)) {
+ bool atNaturalBreak = mCharacterGlyphs[i].CanBreakBefore() == 1;
+ bool atHyphenationBreak = !atNaturalBreak &&
+ haveHyphenation && hyphenBuffer[i - bufferRange.start];
+ bool atBreak = atNaturalBreak || atHyphenationBreak;
+ bool wordWrapping =
+ aCanWordWrap && mCharacterGlyphs[i].IsClusterStart() &&
+ *aBreakPriority <= gfxBreakPriority::eWordWrapBreak;
+
+ if (atBreak || wordWrapping) {
+ gfxFloat hyphenatedAdvance = advance;
+ if (atHyphenationBreak) {
+ hyphenatedAdvance += aProvider->GetHyphenWidth();
+ }
+
+ if (lastBreak < 0 || width + hyphenatedAdvance - trimmableAdvance <= aWidth) {
+ // We can break here.
+ lastBreak = i;
+ lastBreakTrimmableChars = trimmableChars;
+ lastBreakTrimmableAdvance = trimmableAdvance;
+ lastBreakUsedHyphenation = atHyphenationBreak;
+ *aBreakPriority = atBreak ? gfxBreakPriority::eNormalBreak
+ : gfxBreakPriority::eWordWrapBreak;
+ }
+
+ width += advance;
+ advance = 0;
+ if (width - trimmableAdvance > aWidth) {
+ // No more text fits. Abort
+ aborted = true;
+ break;
+ }
+ }
+ }
+
+ gfxFloat charAdvance;
+ if (i >= ligatureRange.start && i < ligatureRange.end) {
+ charAdvance = GetAdvanceForGlyphs(Range(i, i + 1));
+ if (haveSpacing) {
+ PropertyProvider::Spacing *space =
+ &spacingBuffer[i - bufferRange.start];
+ charAdvance += space->mBefore + space->mAfter;
+ }
+ } else {
+ charAdvance =
+ ComputePartialLigatureWidth(Range(i, i + 1), aProvider);
+ }
+
+ advance += charAdvance;
+ if (aTrimWhitespace || aWhitespaceCanHang) {
+ if (mCharacterGlyphs[i].CharIsSpace()) {
+ ++trimmableChars;
+ trimmableAdvance += charAdvance;
+ } else {
+ trimmableAdvance = 0;
+ trimmableChars = 0;
+ }
+ }
+ }
+
+ if (!aborted) {
+ width += advance;
+ }
+
+ // There are three possibilities:
+ // 1) all the text fit (width <= aWidth)
+ // 2) some of the text fit up to a break opportunity (width > aWidth && lastBreak >= 0)
+ // 3) none of the text fits before a break opportunity (width > aWidth && lastBreak < 0)
+ uint32_t charsFit;
+ bool usedHyphenation = false;
+ if (width - trimmableAdvance <= aWidth) {
+ charsFit = aMaxLength;
+ } else if (lastBreak >= 0) {
+ charsFit = lastBreak - aStart;
+ trimmableChars = lastBreakTrimmableChars;
+ trimmableAdvance = lastBreakTrimmableAdvance;
+ usedHyphenation = lastBreakUsedHyphenation;
+ } else {
+ charsFit = aMaxLength;
+ }
+
+ if (aMetrics) {
+ auto fitEnd = aStart + charsFit;
+ // Initially, measure everything, so that our bounding box includes
+ // any trimmable or hanging whitespace.
+ *aMetrics = MeasureText(Range(aStart, fitEnd),
+ aBoundingBoxType, aRefDrawTarget,
+ aProvider);
+ if (aTrimWhitespace || aWhitespaceCanHang) {
+ // Measure trailing whitespace that is to be trimmed/hung.
+ Metrics trimOrHangMetrics =
+ MeasureText(Range(fitEnd - trimmableChars, fitEnd),
+ aBoundingBoxType, aRefDrawTarget,
+ aProvider);
+ if (aTrimWhitespace) {
+ aMetrics->mAdvanceWidth -= trimOrHangMetrics.mAdvanceWidth;
+ } else if (aMetrics->mAdvanceWidth > aWidth) {
+ // Restrict width of hanging whitespace so it doesn't overflow.
+ aMetrics->mAdvanceWidth =
+ std::max(aWidth, aMetrics->mAdvanceWidth -
+ trimOrHangMetrics.mAdvanceWidth);
+ }
+ }
+ }
+ if (aTrimWhitespace) {
+ *aTrimWhitespace = trimmableAdvance;
+ }
+ if (aUsedHyphenation) {
+ *aUsedHyphenation = usedHyphenation;
+ }
+ if (aLastBreak && charsFit == aMaxLength) {
+ if (lastBreak < 0) {
+ *aLastBreak = UINT32_MAX;
+ } else {
+ *aLastBreak = lastBreak - aStart;
+ }
+ }
+
+ return charsFit;
+}
+
+gfxFloat
+gfxTextRun::GetAdvanceWidth(Range aRange, PropertyProvider *aProvider,
+ PropertyProvider::Spacing* aSpacing) const
+{
+ NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
+
+ Range ligatureRange = aRange;
+ ShrinkToLigatureBoundaries(&ligatureRange);
+
+ gfxFloat result =
+ ComputePartialLigatureWidth(Range(aRange.start, ligatureRange.start),
+ aProvider) +
+ ComputePartialLigatureWidth(Range(ligatureRange.end, aRange.end),
+ aProvider);
+
+ if (aSpacing) {
+ aSpacing->mBefore = aSpacing->mAfter = 0;
+ }
+
+ // Account for all remaining spacing here. This is more efficient than
+ // processing it along with the glyphs.
+ if (aProvider && (mFlags & gfxTextRunFactory::TEXT_ENABLE_SPACING)) {
+ uint32_t i;
+ AutoTArray<PropertyProvider::Spacing,200> spacingBuffer;
+ if (spacingBuffer.AppendElements(aRange.Length())) {
+ GetAdjustedSpacing(this, ligatureRange, aProvider,
+ spacingBuffer.Elements());
+ for (i = 0; i < ligatureRange.Length(); ++i) {
+ PropertyProvider::Spacing *space = &spacingBuffer[i];
+ result += space->mBefore + space->mAfter;
+ }
+ if (aSpacing) {
+ aSpacing->mBefore = spacingBuffer[0].mBefore;
+ aSpacing->mAfter = spacingBuffer.LastElement().mAfter;
+ }
+ }
+ }
+
+ return result + GetAdvanceForGlyphs(ligatureRange);
+}
+
+bool
+gfxTextRun::SetLineBreaks(Range aRange,
+ bool aLineBreakBefore, bool aLineBreakAfter,
+ gfxFloat *aAdvanceWidthDelta)
+{
+ // Do nothing because our shaping does not currently take linebreaks into
+ // account. There is no change in advance width.
+ if (aAdvanceWidthDelta) {
+ *aAdvanceWidthDelta = 0;
+ }
+ return false;
+}
+
+uint32_t
+gfxTextRun::FindFirstGlyphRunContaining(uint32_t aOffset) const
+{
+ NS_ASSERTION(aOffset <= GetLength(), "Bad offset looking for glyphrun");
+ NS_ASSERTION(GetLength() == 0 || mGlyphRuns.Length() > 0,
+ "non-empty text but no glyph runs present!");
+ if (aOffset == GetLength())
+ return mGlyphRuns.Length();
+ uint32_t start = 0;
+ uint32_t end = mGlyphRuns.Length();
+ while (end - start > 1) {
+ uint32_t mid = (start + end)/2;
+ if (mGlyphRuns[mid].mCharacterOffset <= aOffset) {
+ start = mid;
+ } else {
+ end = mid;
+ }
+ }
+ NS_ASSERTION(mGlyphRuns[start].mCharacterOffset <= aOffset,
+ "Hmm, something went wrong, aOffset should have been found");
+ return start;
+}
+
+nsresult
+gfxTextRun::AddGlyphRun(gfxFont *aFont, uint8_t aMatchType,
+ uint32_t aUTF16Offset, bool aForceNewRun,
+ uint16_t aOrientation)
+{
+ NS_ASSERTION(aFont, "adding glyph run for null font!");
+ NS_ASSERTION(aOrientation != gfxTextRunFactory::TEXT_ORIENT_VERTICAL_MIXED,
+ "mixed orientation should have been resolved");
+ if (!aFont) {
+ return NS_OK;
+ }
+ uint32_t numGlyphRuns = mGlyphRuns.Length();
+ if (!aForceNewRun && numGlyphRuns > 0) {
+ GlyphRun *lastGlyphRun = &mGlyphRuns[numGlyphRuns - 1];
+
+ NS_ASSERTION(lastGlyphRun->mCharacterOffset <= aUTF16Offset,
+ "Glyph runs out of order (and run not forced)");
+
+ // Don't append a run if the font is already the one we want
+ if (lastGlyphRun->mFont == aFont &&
+ lastGlyphRun->mMatchType == aMatchType &&
+ lastGlyphRun->mOrientation == aOrientation)
+ {
+ return NS_OK;
+ }
+
+ // If the offset has not changed, avoid leaving a zero-length run
+ // by overwriting the last entry instead of appending...
+ if (lastGlyphRun->mCharacterOffset == aUTF16Offset) {
+
+ // ...except that if the run before the last entry had the same
+ // font as the new one wants, merge with it instead of creating
+ // adjacent runs with the same font
+ if (numGlyphRuns > 1 &&
+ mGlyphRuns[numGlyphRuns - 2].mFont == aFont &&
+ mGlyphRuns[numGlyphRuns - 2].mMatchType == aMatchType &&
+ mGlyphRuns[numGlyphRuns - 2].mOrientation == aOrientation)
+ {
+ mGlyphRuns.TruncateLength(numGlyphRuns - 1);
+ return NS_OK;
+ }
+
+ lastGlyphRun->mFont = aFont;
+ lastGlyphRun->mMatchType = aMatchType;
+ lastGlyphRun->mOrientation = aOrientation;
+ return NS_OK;
+ }
+ }
+
+ NS_ASSERTION(aForceNewRun || numGlyphRuns > 0 || aUTF16Offset == 0,
+ "First run doesn't cover the first character (and run not forced)?");
+
+ GlyphRun *glyphRun = mGlyphRuns.AppendElement();
+ if (!glyphRun)
+ return NS_ERROR_OUT_OF_MEMORY;
+ glyphRun->mFont = aFont;
+ glyphRun->mCharacterOffset = aUTF16Offset;
+ glyphRun->mMatchType = aMatchType;
+ glyphRun->mOrientation = aOrientation;
+ return NS_OK;
+}
+
+void
+gfxTextRun::SortGlyphRuns()
+{
+ if (mGlyphRuns.Length() <= 1)
+ return;
+
+ nsTArray<GlyphRun> runs(mGlyphRuns);
+ GlyphRunOffsetComparator comp;
+ runs.Sort(comp);
+
+ // Now copy back, coalescing adjacent glyph runs that have the same font
+ mGlyphRuns.Clear();
+ uint32_t i, count = runs.Length();
+ for (i = 0; i < count; ++i) {
+ // a GlyphRun with the same font and orientation as the previous can
+ // just be skipped; the last GlyphRun will cover its character range.
+ if (i == 0 || runs[i].mFont != runs[i - 1].mFont ||
+ runs[i].mOrientation != runs[i - 1].mOrientation) {
+ mGlyphRuns.AppendElement(runs[i]);
+ // If two fonts have the same character offset, Sort() will have
+ // randomized the order.
+ NS_ASSERTION(i == 0 ||
+ runs[i].mCharacterOffset !=
+ runs[i - 1].mCharacterOffset,
+ "Two fonts for the same run, glyph indices may not match the font");
+ }
+ }
+}
+
+// Note that SanitizeGlyphRuns scans all glyph runs in the textrun;
+// therefore we only call it once, at the end of textrun construction,
+// NOT incrementally as each glyph run is added (bug 680402).
+void
+gfxTextRun::SanitizeGlyphRuns()
+{
+ if (mGlyphRuns.Length() <= 1)
+ return;
+
+ // If any glyph run starts with ligature-continuation characters, we need to advance it
+ // to the first "real" character to avoid drawing partial ligature glyphs from wrong font
+ // (seen with U+FEFF in reftest 474417-1, as Core Text eliminates the glyph, which makes
+ // it appear as if a ligature has been formed)
+ int32_t i, lastRunIndex = mGlyphRuns.Length() - 1;
+ const CompressedGlyph *charGlyphs = mCharacterGlyphs;
+ for (i = lastRunIndex; i >= 0; --i) {
+ GlyphRun& run = mGlyphRuns[i];
+ while (charGlyphs[run.mCharacterOffset].IsLigatureContinuation() &&
+ run.mCharacterOffset < GetLength()) {
+ run.mCharacterOffset++;
+ }
+ // if the run has become empty, eliminate it
+ if ((i < lastRunIndex &&
+ run.mCharacterOffset >= mGlyphRuns[i+1].mCharacterOffset) ||
+ (i == lastRunIndex && run.mCharacterOffset == GetLength())) {
+ mGlyphRuns.RemoveElementAt(i);
+ --lastRunIndex;
+ }
+ }
+}
+
+uint32_t
+gfxTextRun::CountMissingGlyphs() const
+{
+ uint32_t i;
+ uint32_t count = 0;
+ for (i = 0; i < GetLength(); ++i) {
+ if (mCharacterGlyphs[i].IsMissing()) {
+ ++count;
+ }
+ }
+ return count;
+}
+
+void
+gfxTextRun::CopyGlyphDataFrom(gfxShapedWord *aShapedWord, uint32_t aOffset)
+{
+ uint32_t wordLen = aShapedWord->GetLength();
+ NS_ASSERTION(aOffset + wordLen <= GetLength(),
+ "word overruns end of textrun!");
+
+ CompressedGlyph *charGlyphs = GetCharacterGlyphs();
+ const CompressedGlyph *wordGlyphs = aShapedWord->GetCharacterGlyphs();
+ if (aShapedWord->HasDetailedGlyphs()) {
+ for (uint32_t i = 0; i < wordLen; ++i, ++aOffset) {
+ const CompressedGlyph& g = wordGlyphs[i];
+ if (g.IsSimpleGlyph()) {
+ charGlyphs[aOffset] = g;
+ } else {
+ const DetailedGlyph *details =
+ g.GetGlyphCount() > 0 ?
+ aShapedWord->GetDetailedGlyphs(i) : nullptr;
+ SetGlyphs(aOffset, g, details);
+ }
+ }
+ } else {
+ memcpy(charGlyphs + aOffset, wordGlyphs,
+ wordLen * sizeof(CompressedGlyph));
+ }
+}
+
+void
+gfxTextRun::CopyGlyphDataFrom(gfxTextRun *aSource, Range aRange, uint32_t aDest)
+{
+ NS_ASSERTION(aRange.end <= aSource->GetLength(),
+ "Source substring out of range");
+ NS_ASSERTION(aDest + aRange.Length() <= GetLength(),
+ "Destination substring out of range");
+
+ if (aSource->mSkipDrawing) {
+ mSkipDrawing = true;
+ }
+
+ // Copy base glyph data, and DetailedGlyph data where present
+ const CompressedGlyph *srcGlyphs = aSource->mCharacterGlyphs + aRange.start;
+ CompressedGlyph *dstGlyphs = mCharacterGlyphs + aDest;
+ for (uint32_t i = 0; i < aRange.Length(); ++i) {
+ CompressedGlyph g = srcGlyphs[i];
+ g.SetCanBreakBefore(!g.IsClusterStart() ?
+ CompressedGlyph::FLAG_BREAK_TYPE_NONE :
+ dstGlyphs[i].CanBreakBefore());
+ if (!g.IsSimpleGlyph()) {
+ uint32_t count = g.GetGlyphCount();
+ if (count > 0) {
+ DetailedGlyph *dst = AllocateDetailedGlyphs(i + aDest, count);
+ if (dst) {
+ DetailedGlyph *src =
+ aSource->GetDetailedGlyphs(i + aRange.start);
+ if (src) {
+ ::memcpy(dst, src, count * sizeof(DetailedGlyph));
+ } else {
+ g.SetMissing(0);
+ }
+ } else {
+ g.SetMissing(0);
+ }
+ }
+ }
+ dstGlyphs[i] = g;
+ }
+
+ // Copy glyph runs
+ GlyphRunIterator iter(aSource, aRange);
+#ifdef DEBUG
+ const GlyphRun *prevRun = nullptr;
+#endif
+ while (iter.NextRun()) {
+ gfxFont *font = iter.GetGlyphRun()->mFont;
+ NS_ASSERTION(!prevRun || prevRun->mFont != iter.GetGlyphRun()->mFont ||
+ prevRun->mMatchType != iter.GetGlyphRun()->mMatchType ||
+ prevRun->mOrientation != iter.GetGlyphRun()->mOrientation,
+ "Glyphruns not coalesced?");
+#ifdef DEBUG
+ prevRun = iter.GetGlyphRun();
+ uint32_t end = iter.GetStringEnd();
+#endif
+ uint32_t start = iter.GetStringStart();
+
+ // These used to be NS_ASSERTION()s, but WARNING is more appropriate.
+ // Although it's unusual (and not desirable), it's possible for us to assign
+ // different fonts to a base character and a following diacritic.
+ // Example on OSX 10.5/10.6 with default fonts installed:
+ // data:text/html,<p style="font-family:helvetica, arial, sans-serif;">
+ // &%23x043E;&%23x0486;&%23x20;&%23x043E;&%23x0486;
+ // This means the rendering of the cluster will probably not be very good,
+ // but it's the best we can do for now if the specified font only covered the
+ // initial base character and not its applied marks.
+ NS_WARNING_ASSERTION(
+ aSource->IsClusterStart(start),
+ "Started font run in the middle of a cluster");
+ NS_WARNING_ASSERTION(
+ end == aSource->GetLength() || aSource->IsClusterStart(end),
+ "Ended font run in the middle of a cluster");
+
+ nsresult rv = AddGlyphRun(font, iter.GetGlyphRun()->mMatchType,
+ start - aRange.start + aDest, false,
+ iter.GetGlyphRun()->mOrientation);
+ if (NS_FAILED(rv))
+ return;
+ }
+}
+
+void
+gfxTextRun::ClearGlyphsAndCharacters()
+{
+ ResetGlyphRuns();
+ memset(reinterpret_cast<char*>(mCharacterGlyphs), 0,
+ mLength * sizeof(CompressedGlyph));
+ mDetailedGlyphs = nullptr;
+}
+
+void
+gfxTextRun::SetSpaceGlyph(gfxFont* aFont, DrawTarget* aDrawTarget,
+ uint32_t aCharIndex, uint16_t aOrientation)
+{
+ if (SetSpaceGlyphIfSimple(aFont, aCharIndex, ' ', aOrientation)) {
+ return;
+ }
+
+ aFont->InitWordCache();
+ static const uint8_t space = ' ';
+ uint32_t flags = gfxTextRunFactory::TEXT_IS_8BIT |
+ gfxTextRunFactory::TEXT_IS_ASCII |
+ gfxTextRunFactory::TEXT_IS_PERSISTENT |
+ aOrientation;
+ bool vertical =
+ (GetFlags() & gfxTextRunFactory::TEXT_ORIENT_VERTICAL_UPRIGHT) != 0;
+ gfxShapedWord* sw = aFont->GetShapedWord(aDrawTarget,
+ &space, 1,
+ gfxShapedWord::HashMix(0, ' '),
+ Script::LATIN,
+ vertical,
+ mAppUnitsPerDevUnit,
+ flags,
+ nullptr);
+ if (sw) {
+ AddGlyphRun(aFont, gfxTextRange::kFontGroup, aCharIndex, false,
+ aOrientation);
+ CopyGlyphDataFrom(sw, aCharIndex);
+ }
+}
+
+bool
+gfxTextRun::SetSpaceGlyphIfSimple(gfxFont* aFont, uint32_t aCharIndex,
+ char16_t aSpaceChar, uint16_t aOrientation)
+{
+ uint32_t spaceGlyph = aFont->GetSpaceGlyph();
+ if (!spaceGlyph || !CompressedGlyph::IsSimpleGlyphID(spaceGlyph)) {
+ return false;
+ }
+
+ gfxFont::Orientation fontOrientation =
+ (aOrientation & gfxTextRunFactory::TEXT_ORIENT_VERTICAL_UPRIGHT) ?
+ gfxFont::eVertical : gfxFont::eHorizontal;
+ uint32_t spaceWidthAppUnits =
+ NS_lroundf(aFont->GetMetrics(fontOrientation).spaceWidth *
+ mAppUnitsPerDevUnit);
+ if (!CompressedGlyph::IsSimpleAdvance(spaceWidthAppUnits)) {
+ return false;
+ }
+
+ AddGlyphRun(aFont, gfxTextRange::kFontGroup, aCharIndex, false,
+ aOrientation);
+ CompressedGlyph g;
+ g.SetSimpleGlyph(spaceWidthAppUnits, spaceGlyph);
+ if (aSpaceChar == ' ') {
+ g.SetIsSpace();
+ }
+ GetCharacterGlyphs()[aCharIndex] = g;
+ return true;
+}
+
+void
+gfxTextRun::FetchGlyphExtents(DrawTarget* aRefDrawTarget)
+{
+ bool needsGlyphExtents = NeedsGlyphExtents(this);
+ if (!needsGlyphExtents && !mDetailedGlyphs)
+ return;
+
+ uint32_t i, runCount = mGlyphRuns.Length();
+ CompressedGlyph *charGlyphs = mCharacterGlyphs;
+ for (i = 0; i < runCount; ++i) {
+ const GlyphRun& run = mGlyphRuns[i];
+ gfxFont *font = run.mFont;
+ if (MOZ_UNLIKELY(font->GetStyle()->size == 0) ||
+ MOZ_UNLIKELY(font->GetStyle()->sizeAdjust == 0.0f)) {
+ continue;
+ }
+
+ uint32_t start = run.mCharacterOffset;
+ uint32_t end = i + 1 < runCount ?
+ mGlyphRuns[i + 1].mCharacterOffset : GetLength();
+ bool fontIsSetup = false;
+ uint32_t j;
+ gfxGlyphExtents *extents = font->GetOrCreateGlyphExtents(mAppUnitsPerDevUnit);
+
+ for (j = start; j < end; ++j) {
+ const gfxTextRun::CompressedGlyph *glyphData = &charGlyphs[j];
+ if (glyphData->IsSimpleGlyph()) {
+ // If we're in speed mode, don't set up glyph extents here; we'll
+ // just return "optimistic" glyph bounds later
+ if (needsGlyphExtents) {
+ uint32_t glyphIndex = glyphData->GetSimpleGlyph();
+ if (!extents->IsGlyphKnown(glyphIndex)) {
+ if (!fontIsSetup) {
+ if (!font->SetupCairoFont(aRefDrawTarget)) {
+ NS_WARNING("failed to set up font for glyph extents");
+ break;
+ }
+ fontIsSetup = true;
+ }
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+ ++gGlyphExtentsSetupEagerSimple;
+#endif
+ font->SetupGlyphExtents(aRefDrawTarget,
+ glyphIndex, false, extents);
+ }
+ }
+ } else if (!glyphData->IsMissing()) {
+ uint32_t glyphCount = glyphData->GetGlyphCount();
+ if (glyphCount == 0) {
+ continue;
+ }
+ const gfxTextRun::DetailedGlyph *details = GetDetailedGlyphs(j);
+ if (!details) {
+ continue;
+ }
+ for (uint32_t k = 0; k < glyphCount; ++k, ++details) {
+ uint32_t glyphIndex = details->mGlyphID;
+ if (!extents->IsGlyphKnownWithTightExtents(glyphIndex)) {
+ if (!fontIsSetup) {
+ if (!font->SetupCairoFont(aRefDrawTarget)) {
+ NS_WARNING("failed to set up font for glyph extents");
+ break;
+ }
+ fontIsSetup = true;
+ }
+#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
+ ++gGlyphExtentsSetupEagerTight;
+#endif
+ font->SetupGlyphExtents(aRefDrawTarget,
+ glyphIndex, true, extents);
+ }
+ }
+ }
+ }
+ }
+}
+
+
+size_t
+gfxTextRun::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf)
+{
+ // The second arg is how much gfxTextRun::AllocateStorage would have
+ // allocated.
+ size_t total = mGlyphRuns.ShallowSizeOfExcludingThis(aMallocSizeOf);
+
+ if (mDetailedGlyphs) {
+ total += mDetailedGlyphs->SizeOfIncludingThis(aMallocSizeOf);
+ }
+
+ return total;
+}
+
+size_t
+gfxTextRun::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf)
+{
+ return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}
+
+
+#ifdef DEBUG
+void
+gfxTextRun::Dump(FILE* aOutput) {
+ if (!aOutput) {
+ aOutput = stdout;
+ }
+
+ uint32_t i;
+ fputc('[', aOutput);
+ for (i = 0; i < mGlyphRuns.Length(); ++i) {
+ if (i > 0) {
+ fputc(',', aOutput);
+ }
+ gfxFont* font = mGlyphRuns[i].mFont;
+ const gfxFontStyle* style = font->GetStyle();
+ NS_ConvertUTF16toUTF8 fontName(font->GetName());
+ nsAutoCString lang;
+ style->language->ToUTF8String(lang);
+ fprintf(aOutput, "%d: %s %f/%d/%d/%s", mGlyphRuns[i].mCharacterOffset,
+ fontName.get(), style->size,
+ style->weight, style->style, lang.get());
+ }
+ fputc(']', aOutput);
+}
+#endif
+
+gfxFontGroup::gfxFontGroup(const FontFamilyList& aFontFamilyList,
+ const gfxFontStyle *aStyle,
+ gfxTextPerfMetrics* aTextPerf,
+ gfxUserFontSet *aUserFontSet,
+ gfxFloat aDevToCssSize)
+ : mFamilyList(aFontFamilyList)
+ , mStyle(*aStyle)
+ , mUnderlineOffset(UNDERLINE_OFFSET_NOT_SET)
+ , mHyphenWidth(-1)
+ , mDevToCssSize(aDevToCssSize)
+ , mUserFontSet(aUserFontSet)
+ , mTextPerf(aTextPerf)
+ , mLastPrefLang(eFontPrefLang_Western)
+ , mPageLang(gfxPlatformFontList::GetFontPrefLangFor(aStyle->language))
+ , mLastPrefFirstFont(false)
+ , mSkipDrawing(false)
+ , mSkipUpdateUserFonts(false)
+{
+ // We don't use SetUserFontSet() here, as we want to unconditionally call
+ // BuildFontList() rather than only do UpdateUserFonts() if it changed.
+ mCurrGeneration = GetGeneration();
+ BuildFontList();
+}
+
+gfxFontGroup::~gfxFontGroup()
+{
+}
+
+void
+gfxFontGroup::BuildFontList()
+{
+ bool enumerateFonts = true;
+
+#if defined(MOZ_WIDGET_GTK)
+ // xxx - eliminate this once gfxPangoFontGroup is no longer needed
+ enumerateFonts = gfxPlatformGtk::UseFcFontList();
+#endif
+ if (!enumerateFonts) {
+ return;
+ }
+
+ // initialize fonts in the font family list
+ AutoTArray<gfxFontFamily*,10> fonts;
+ gfxPlatformFontList *pfl = gfxPlatformFontList::PlatformFontList();
+
+ // lookup fonts in the fontlist
+ for (const FontFamilyName& name : mFamilyList.GetFontlist()) {
+ if (name.IsNamed()) {
+ AddPlatformFont(name.mName, fonts);
+ } else {
+ pfl->AddGenericFonts(name.mType, mStyle.language, fonts);
+ if (mTextPerf) {
+ mTextPerf->current.genericLookups++;
+ }
+ }
+ }
+
+ // if necessary, append default generic onto the end
+ if (mFamilyList.GetDefaultFontType() != eFamily_none &&
+ !mFamilyList.HasDefaultGeneric()) {
+ pfl->AddGenericFonts(mFamilyList.GetDefaultFontType(),
+ mStyle.language, fonts);
+ if (mTextPerf) {
+ mTextPerf->current.genericLookups++;
+ }
+ }
+
+ // build the fontlist from the specified families
+ for (gfxFontFamily* fontFamily : fonts) {
+ AddFamilyToFontList(fontFamily);
+ }
+}
+
+void
+gfxFontGroup::AddPlatformFont(const nsAString& aName,
+ nsTArray<gfxFontFamily*>& aFamilyList)
+{
+ // First, look up in the user font set...
+ // If the fontSet matches the family, we must not look for a platform
+ // font of the same name, even if we fail to actually get a fontEntry
+ // here; we'll fall back to the next name in the CSS font-family list.
+ if (mUserFontSet) {
+ // Add userfonts to the fontlist whether already loaded
+ // or not. Loading is initiated during font matching.
+ gfxFontFamily* family = mUserFontSet->LookupFamily(aName);
+ if (family) {
+ aFamilyList.AppendElement(family);
+ return;
+ }
+ }
+
+ // Not known in the user font set ==> check system fonts
+ gfxPlatformFontList::PlatformFontList()
+ ->FindAndAddFamilies(aName, &aFamilyList, &mStyle, mDevToCssSize);
+}
+
+void
+gfxFontGroup::AddFamilyToFontList(gfxFontFamily* aFamily)
+{
+ NS_ASSERTION(aFamily, "trying to add a null font family to fontlist");
+ AutoTArray<gfxFontEntry*,4> fontEntryList;
+ bool needsBold;
+ aFamily->FindAllFontsForStyle(mStyle, fontEntryList, needsBold);
+ // add these to the fontlist
+ for (gfxFontEntry* fe : fontEntryList) {
+ if (!HasFont(fe)) {
+ FamilyFace ff(aFamily, fe, needsBold);
+ if (fe->mIsUserFontContainer) {
+ ff.CheckState(mSkipDrawing);
+ }
+ mFonts.AppendElement(ff);
+ }
+ }
+ // for a family marked as "check fallback faces", only mark the last
+ // entry so that fallbacks for a family are only checked once
+ if (aFamily->CheckForFallbackFaces() &&
+ !fontEntryList.IsEmpty() && !mFonts.IsEmpty()) {
+ mFonts.LastElement().SetCheckForFallbackFaces();
+ }
+}
+
+bool
+gfxFontGroup::HasFont(const gfxFontEntry *aFontEntry)
+{
+ uint32_t count = mFonts.Length();
+ for (uint32_t i = 0; i < count; ++i) {
+ if (mFonts[i].FontEntry() == aFontEntry) {
+ return true;
+ }
+ }
+ return false;
+}
+
+gfxFont*
+gfxFontGroup::GetFontAt(int32_t i, uint32_t aCh)
+{
+ if (uint32_t(i) >= mFonts.Length()) {
+ return nullptr;
+ }
+
+ FamilyFace& ff = mFonts[i];
+ if (ff.IsInvalid() || ff.IsLoading()) {
+ return nullptr;
+ }
+
+ RefPtr<gfxFont> font = ff.Font();
+ if (!font) {
+ gfxFontEntry* fe = mFonts[i].FontEntry();
+ gfxCharacterMap* unicodeRangeMap = nullptr;
+ if (fe->mIsUserFontContainer) {
+ gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
+ if (ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED &&
+ ufe->CharacterInUnicodeRange(aCh) &&
+ !FontLoadingForFamily(ff.Family(), aCh)) {
+ ufe->Load();
+ ff.CheckState(mSkipDrawing);
+ }
+ fe = ufe->GetPlatformFontEntry();
+ if (!fe) {
+ return nullptr;
+ }
+ unicodeRangeMap = ufe->GetUnicodeRangeMap();
+ }
+ font = fe->FindOrMakeFont(&mStyle, mFonts[i].NeedsBold(),
+ unicodeRangeMap);
+ if (!font || !font->Valid()) {
+ ff.SetInvalid();
+ return nullptr;
+ }
+ mFonts[i].SetFont(font);
+ }
+ return font.get();
+}
+
+void
+gfxFontGroup::FamilyFace::CheckState(bool& aSkipDrawing)
+{
+ gfxFontEntry* fe = FontEntry();
+ if (fe->mIsUserFontContainer) {
+ gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
+ gfxUserFontEntry::UserFontLoadState state = ufe->LoadState();
+ switch (state) {
+ case gfxUserFontEntry::STATUS_LOADING:
+ SetLoading(true);
+ break;
+ case gfxUserFontEntry::STATUS_FAILED:
+ SetInvalid();
+ // fall-thru to the default case
+ MOZ_FALLTHROUGH;
+ default:
+ SetLoading(false);
+ }
+ if (ufe->WaitForUserFont()) {
+ aSkipDrawing = true;
+ }
+ }
+}
+
+bool
+gfxFontGroup::FamilyFace::EqualsUserFont(const gfxUserFontEntry* aUserFont) const
+{
+ gfxFontEntry* fe = FontEntry();
+ // if there's a font, the entry is the underlying platform font
+ if (mFontCreated) {
+ gfxFontEntry* pfe = aUserFont->GetPlatformFontEntry();
+ if (pfe == fe) {
+ return true;
+ }
+ } else if (fe == aUserFont) {
+ return true;
+ }
+ return false;
+}
+
+bool
+gfxFontGroup::FontLoadingForFamily(gfxFontFamily* aFamily, uint32_t aCh) const
+{
+ uint32_t count = mFonts.Length();
+ for (uint32_t i = 0; i < count; ++i) {
+ const FamilyFace& ff = mFonts[i];
+ if (ff.IsLoading() && ff.Family() == aFamily) {
+ const gfxUserFontEntry* ufe =
+ static_cast<gfxUserFontEntry*>(ff.FontEntry());
+ if (ufe->CharacterInUnicodeRange(aCh)) {
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+gfxFont*
+gfxFontGroup::GetDefaultFont()
+{
+ if (mDefaultFont) {
+ return mDefaultFont.get();
+ }
+
+ bool needsBold;
+ gfxPlatformFontList *pfl = gfxPlatformFontList::PlatformFontList();
+ gfxFontFamily *defaultFamily = pfl->GetDefaultFont(&mStyle);
+ NS_ASSERTION(defaultFamily,
+ "invalid default font returned by GetDefaultFont");
+
+ if (defaultFamily) {
+ gfxFontEntry *fe = defaultFamily->FindFontForStyle(mStyle,
+ needsBold);
+ if (fe) {
+ mDefaultFont = fe->FindOrMakeFont(&mStyle, needsBold);
+ }
+ }
+
+ uint32_t numInits, loaderState;
+ pfl->GetFontlistInitInfo(numInits, loaderState);
+ NS_ASSERTION(numInits != 0,
+ "must initialize system fontlist before getting default font!");
+
+ uint32_t numFonts = 0;
+ if (!mDefaultFont) {
+ // Try for a "font of last resort...."
+ // Because an empty font list would be Really Bad for later code
+ // that assumes it will be able to get valid metrics for layout,
+ // just look for the first usable font and put in the list.
+ // (see bug 554544)
+ AutoTArray<RefPtr<gfxFontFamily>,200> familyList;
+ pfl->GetFontFamilyList(familyList);
+ numFonts = familyList.Length();
+ for (uint32_t i = 0; i < numFonts; ++i) {
+ gfxFontEntry *fe = familyList[i]->FindFontForStyle(mStyle,
+ needsBold);
+ if (fe) {
+ mDefaultFont = fe->FindOrMakeFont(&mStyle, needsBold);
+ if (mDefaultFont) {
+ break;
+ }
+ }
+ }
+ }
+
+ if (!mDefaultFont) {
+ // an empty font list at this point is fatal; we're not going to
+ // be able to do even the most basic layout operations
+
+ // annotate crash report with fontlist info
+ nsAutoCString fontInitInfo;
+ fontInitInfo.AppendPrintf("no fonts - init: %d fonts: %d loader: %d",
+ numInits, numFonts, loaderState);
+#ifdef XP_WIN
+ bool dwriteEnabled = gfxWindowsPlatform::GetPlatform()->DWriteEnabled();
+ double upTime = (double) GetTickCount();
+ fontInitInfo.AppendPrintf(" backend: %s system-uptime: %9.3f sec",
+ dwriteEnabled ? "directwrite" : "gdi", upTime/1000);
+#endif
+ gfxCriticalError() << fontInitInfo.get();
+
+ char msg[256]; // CHECK buffer length if revising message below
+ nsAutoString familiesString;
+ mFamilyList.ToString(familiesString);
+ SprintfLiteral(msg, "unable to find a usable font (%.220s)",
+ NS_ConvertUTF16toUTF8(familiesString).get());
+ NS_RUNTIMEABORT(msg);
+ }
+
+ return mDefaultFont.get();
+}
+
+gfxFont*
+gfxFontGroup::GetFirstValidFont(uint32_t aCh)
+{
+ uint32_t count = mFonts.Length();
+ for (uint32_t i = 0; i < count; ++i) {
+ FamilyFace& ff = mFonts[i];
+ if (ff.IsInvalid()) {
+ continue;
+ }
+
+ // already have a font?
+ gfxFont* font = ff.Font();
+ if (font) {
+ return font;
+ }
+
+ // Need to build a font, loading userfont if not loaded. In
+ // cases where unicode range might apply, use the character
+ // provided.
+ if (ff.IsUserFontContainer()) {
+ gfxUserFontEntry* ufe =
+ static_cast<gfxUserFontEntry*>(mFonts[i].FontEntry());
+ bool inRange = ufe->CharacterInUnicodeRange(aCh);
+ if (ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED &&
+ inRange && !FontLoadingForFamily(ff.Family(), aCh)) {
+ ufe->Load();
+ ff.CheckState(mSkipDrawing);
+ }
+ if (ufe->LoadState() != gfxUserFontEntry::STATUS_LOADED ||
+ !inRange) {
+ continue;
+ }
+ }
+
+ font = GetFontAt(i, aCh);
+ if (font) {
+ return font;
+ }
+ }
+ return GetDefaultFont();
+}
+
+gfxFont *
+gfxFontGroup::GetFirstMathFont()
+{
+ uint32_t count = mFonts.Length();
+ for (uint32_t i = 0; i < count; ++i) {
+ gfxFont* font = GetFontAt(i);
+ if (font && font->TryGetMathTable()) {
+ return font;
+ }
+ }
+ return nullptr;
+}
+
+gfxFontGroup *
+gfxFontGroup::Copy(const gfxFontStyle *aStyle)
+{
+ gfxFontGroup *fg =
+ new gfxFontGroup(mFamilyList, aStyle, mTextPerf,
+ mUserFontSet, mDevToCssSize);
+ return fg;
+}
+
+bool
+gfxFontGroup::IsInvalidChar(uint8_t ch)
+{
+ return ((ch & 0x7f) < 0x20 || ch == 0x7f);
+}
+
+bool
+gfxFontGroup::IsInvalidChar(char16_t ch)
+{
+ // All printable 7-bit ASCII values are OK
+ if (ch >= ' ' && ch < 0x7f) {
+ return false;
+ }
+ // No point in sending non-printing control chars through font shaping
+ if (ch <= 0x9f) {
+ return true;
+ }
+ return (((ch & 0xFF00) == 0x2000 /* Unicode control character */ &&
+ (ch == 0x200B/*ZWSP*/ || ch == 0x2028/*LSEP*/ || ch == 0x2029/*PSEP*/)) ||
+ IsBidiControl(ch));
+}
+
+already_AddRefed<gfxTextRun>
+gfxFontGroup::MakeEmptyTextRun(const Parameters *aParams, uint32_t aFlags)
+{
+ aFlags |= TEXT_IS_8BIT | TEXT_IS_ASCII | TEXT_IS_PERSISTENT;
+ return gfxTextRun::Create(aParams, 0, this, aFlags);
+}
+
+already_AddRefed<gfxTextRun>
+gfxFontGroup::MakeSpaceTextRun(const Parameters *aParams, uint32_t aFlags)
+{
+ aFlags |= TEXT_IS_8BIT | TEXT_IS_ASCII | TEXT_IS_PERSISTENT;
+
+ RefPtr<gfxTextRun> textRun =
+ gfxTextRun::Create(aParams, 1, this, aFlags);
+ if (!textRun) {
+ return nullptr;
+ }
+
+ uint16_t orientation = aFlags & TEXT_ORIENT_MASK;
+ if (orientation == TEXT_ORIENT_VERTICAL_MIXED) {
+ orientation = TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
+ }
+
+ gfxFont *font = GetFirstValidFont();
+ if (MOZ_UNLIKELY(GetStyle()->size == 0) ||
+ MOZ_UNLIKELY(GetStyle()->sizeAdjust == 0.0f)) {
+ // Short-circuit for size-0 fonts, as Windows and ATSUI can't handle
+ // them, and always create at least size 1 fonts, i.e. they still
+ // render something for size 0 fonts.
+ textRun->AddGlyphRun(font, gfxTextRange::kFontGroup, 0, false,
+ orientation);
+ }
+ else {
+ if (font->GetSpaceGlyph()) {
+ // Normally, the font has a cached space glyph, so we can avoid
+ // the cost of calling FindFontForChar.
+ textRun->SetSpaceGlyph(font, aParams->mDrawTarget, 0, orientation);
+ } else {
+ // In case the primary font doesn't have <space> (bug 970891),
+ // find one that does.
+ uint8_t matchType;
+ RefPtr<gfxFont> spaceFont =
+ FindFontForChar(' ', 0, 0, Script::LATIN, nullptr,
+ &matchType);
+ if (spaceFont) {
+ textRun->SetSpaceGlyph(spaceFont, aParams->mDrawTarget, 0,
+ orientation);
+ }
+ }
+ }
+
+ // Note that the gfxGlyphExtents glyph bounds storage for the font will
+ // always contain an entry for the font's space glyph, so we don't have
+ // to call FetchGlyphExtents here.
+ return textRun.forget();
+}
+
+already_AddRefed<gfxTextRun>
+gfxFontGroup::MakeBlankTextRun(uint32_t aLength,
+ const Parameters *aParams, uint32_t aFlags)
+{
+ RefPtr<gfxTextRun> textRun =
+ gfxTextRun::Create(aParams, aLength, this, aFlags);
+ if (!textRun) {
+ return nullptr;
+ }
+
+ uint16_t orientation = aFlags & TEXT_ORIENT_MASK;
+ if (orientation == TEXT_ORIENT_VERTICAL_MIXED) {
+ orientation = TEXT_ORIENT_VERTICAL_UPRIGHT;
+ }
+ textRun->AddGlyphRun(GetFirstValidFont(), gfxTextRange::kFontGroup, 0, false,
+ orientation);
+ return textRun.forget();
+}
+
+already_AddRefed<gfxTextRun>
+gfxFontGroup::MakeHyphenTextRun(DrawTarget* aDrawTarget,
+ uint32_t aAppUnitsPerDevUnit)
+{
+ // only use U+2010 if it is supported by the first font in the group;
+ // it's better to use ASCII '-' from the primary font than to fall back to
+ // U+2010 from some other, possibly poorly-matching face
+ static const char16_t hyphen = 0x2010;
+ gfxFont *font = GetFirstValidFont(uint32_t(hyphen));
+ if (font->HasCharacter(hyphen)) {
+ return MakeTextRun(&hyphen, 1, aDrawTarget, aAppUnitsPerDevUnit,
+ gfxFontGroup::TEXT_IS_PERSISTENT, nullptr);
+ }
+
+ static const uint8_t dash = '-';
+ return MakeTextRun(&dash, 1, aDrawTarget, aAppUnitsPerDevUnit,
+ gfxFontGroup::TEXT_IS_PERSISTENT, nullptr);
+}
+
+gfxFloat
+gfxFontGroup::GetHyphenWidth(gfxTextRun::PropertyProvider *aProvider)
+{
+ if (mHyphenWidth < 0) {
+ RefPtr<DrawTarget> dt(aProvider->GetDrawTarget());
+ if (dt) {
+ RefPtr<gfxTextRun>
+ hyphRun(MakeHyphenTextRun(dt,
+ aProvider->GetAppUnitsPerDevUnit()));
+ mHyphenWidth = hyphRun.get() ? hyphRun->GetAdvanceWidth() : 0;
+ }
+ }
+ return mHyphenWidth;
+}
+
+already_AddRefed<gfxTextRun>
+gfxFontGroup::MakeTextRun(const uint8_t *aString, uint32_t aLength,
+ const Parameters *aParams, uint32_t aFlags,
+ gfxMissingFontRecorder *aMFR)
+{
+ if (aLength == 0) {
+ return MakeEmptyTextRun(aParams, aFlags);
+ }
+ if (aLength == 1 && aString[0] == ' ') {
+ return MakeSpaceTextRun(aParams, aFlags);
+ }
+
+ aFlags |= TEXT_IS_8BIT;
+
+ if (MOZ_UNLIKELY(GetStyle()->size == 0) ||
+ MOZ_UNLIKELY(GetStyle()->sizeAdjust == 0.0f)) {
+ // Short-circuit for size-0 fonts, as Windows and ATSUI can't handle
+ // them, and always create at least size 1 fonts, i.e. they still
+ // render something for size 0 fonts.
+ return MakeBlankTextRun(aLength, aParams, aFlags);
+ }
+
+ RefPtr<gfxTextRun> textRun = gfxTextRun::Create(aParams, aLength, this,
+ aFlags);
+ if (!textRun) {
+ return nullptr;
+ }
+
+ InitTextRun(aParams->mDrawTarget, textRun.get(), aString, aLength, aMFR);
+
+ textRun->FetchGlyphExtents(aParams->mDrawTarget);
+
+ return textRun.forget();
+}
+
+already_AddRefed<gfxTextRun>
+gfxFontGroup::MakeTextRun(const char16_t *aString, uint32_t aLength,
+ const Parameters *aParams, uint32_t aFlags,
+ gfxMissingFontRecorder *aMFR)
+{
+ if (aLength == 0) {
+ return MakeEmptyTextRun(aParams, aFlags);
+ }
+ if (aLength == 1 && aString[0] == ' ') {
+ return MakeSpaceTextRun(aParams, aFlags);
+ }
+ if (MOZ_UNLIKELY(GetStyle()->size == 0) ||
+ MOZ_UNLIKELY(GetStyle()->sizeAdjust == 0.0f)) {
+ return MakeBlankTextRun(aLength, aParams, aFlags);
+ }
+
+ RefPtr<gfxTextRun> textRun = gfxTextRun::Create(aParams, aLength, this,
+ aFlags);
+ if (!textRun) {
+ return nullptr;
+ }
+
+ InitTextRun(aParams->mDrawTarget, textRun.get(), aString, aLength, aMFR);
+
+ textRun->FetchGlyphExtents(aParams->mDrawTarget);
+
+ return textRun.forget();
+}
+
+template<typename T>
+void
+gfxFontGroup::InitTextRun(DrawTarget* aDrawTarget,
+ gfxTextRun *aTextRun,
+ const T *aString,
+ uint32_t aLength,
+ gfxMissingFontRecorder *aMFR)
+{
+ NS_ASSERTION(aLength > 0, "don't call InitTextRun for a zero-length run");
+
+ // we need to do numeral processing even on 8-bit text,
+ // in case we're converting Western to Hindi/Arabic digits
+ int32_t numOption = gfxPlatform::GetPlatform()->GetBidiNumeralOption();
+ UniquePtr<char16_t[]> transformedString;
+ if (numOption != IBMBIDI_NUMERAL_NOMINAL) {
+ // scan the string for numerals that may need to be transformed;
+ // if we find any, we'll make a local copy here and use that for
+ // font matching and glyph generation/shaping
+ bool prevIsArabic =
+ (aTextRun->GetFlags() & gfxTextRunFactory::TEXT_INCOMING_ARABICCHAR) != 0;
+ for (uint32_t i = 0; i < aLength; ++i) {
+ char16_t origCh = aString[i];
+ char16_t newCh = HandleNumberInChar(origCh, prevIsArabic, numOption);
+ if (newCh != origCh) {
+ if (!transformedString) {
+ transformedString = MakeUnique<char16_t[]>(aLength);
+ if (sizeof(T) == sizeof(char16_t)) {
+ memcpy(transformedString.get(), aString, i * sizeof(char16_t));
+ } else {
+ for (uint32_t j = 0; j < i; ++j) {
+ transformedString[j] = aString[j];
+ }
+ }
+ }
+ }
+ if (transformedString) {
+ transformedString[i] = newCh;
+ }
+ prevIsArabic = IS_ARABIC_CHAR(newCh);
+ }
+ }
+
+ LogModule* log = mStyle.systemFont
+ ? gfxPlatform::GetLog(eGfxLog_textrunui)
+ : gfxPlatform::GetLog(eGfxLog_textrun);
+
+ // variant fallback handling may end up passing through this twice
+ bool redo;
+ do {
+ redo = false;
+
+ if (sizeof(T) == sizeof(uint8_t) && !transformedString) {
+
+ if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Warning))) {
+ nsAutoCString lang;
+ mStyle.language->ToUTF8String(lang);
+ nsAutoString families;
+ mFamilyList.ToString(families);
+ nsAutoCString str((const char*)aString, aLength);
+ MOZ_LOG(log, LogLevel::Warning,\
+ ("(%s) fontgroup: [%s] default: %s lang: %s script: %d "
+ "len %d weight: %d width: %d style: %s size: %6.2f %d-byte "
+ "TEXTRUN [%s] ENDTEXTRUN\n",
+ (mStyle.systemFont ? "textrunui" : "textrun"),
+ NS_ConvertUTF16toUTF8(families).get(),
+ (mFamilyList.GetDefaultFontType() == eFamily_serif ?
+ "serif" :
+ (mFamilyList.GetDefaultFontType() == eFamily_sans_serif ?
+ "sans-serif" : "none")),
+ lang.get(), Script::LATIN, aLength,
+ uint32_t(mStyle.weight), uint32_t(mStyle.stretch),
+ (mStyle.style & NS_FONT_STYLE_ITALIC ? "italic" :
+ (mStyle.style & NS_FONT_STYLE_OBLIQUE ? "oblique" :
+ "normal")),
+ mStyle.size,
+ sizeof(T),
+ str.get()));
+ }
+
+ // the text is still purely 8-bit; bypass the script-run itemizer
+ // and treat it as a single Latin run
+ InitScriptRun(aDrawTarget, aTextRun, aString,
+ 0, aLength, Script::LATIN, aMFR);
+ } else {
+ const char16_t *textPtr;
+ if (transformedString) {
+ textPtr = transformedString.get();
+ } else {
+ // typecast to avoid compilation error for the 8-bit version,
+ // even though this is dead code in that case
+ textPtr = reinterpret_cast<const char16_t*>(aString);
+ }
+
+ // split into script runs so that script can potentially influence
+ // the font matching process below
+ gfxScriptItemizer scriptRuns(textPtr, aLength);
+
+ uint32_t runStart = 0, runLimit = aLength;
+ Script runScript = Script::LATIN;
+ while (scriptRuns.Next(runStart, runLimit, runScript)) {
+
+ if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Warning))) {
+ nsAutoCString lang;
+ mStyle.language->ToUTF8String(lang);
+ nsAutoString families;
+ mFamilyList.ToString(families);
+ uint32_t runLen = runLimit - runStart;
+ MOZ_LOG(log, LogLevel::Warning,\
+ ("(%s) fontgroup: [%s] default: %s lang: %s script: %d "
+ "len %d weight: %d width: %d style: %s size: %6.2f "
+ "%d-byte TEXTRUN [%s] ENDTEXTRUN\n",
+ (mStyle.systemFont ? "textrunui" : "textrun"),
+ NS_ConvertUTF16toUTF8(families).get(),
+ (mFamilyList.GetDefaultFontType() == eFamily_serif ?
+ "serif" :
+ (mFamilyList.GetDefaultFontType() == eFamily_sans_serif ?
+ "sans-serif" : "none")),
+ lang.get(), runScript, runLen,
+ uint32_t(mStyle.weight), uint32_t(mStyle.stretch),
+ (mStyle.style & NS_FONT_STYLE_ITALIC ? "italic" :
+ (mStyle.style & NS_FONT_STYLE_OBLIQUE ? "oblique" :
+ "normal")),
+ mStyle.size,
+ sizeof(T),
+ NS_ConvertUTF16toUTF8(textPtr + runStart, runLen).get()));
+ }
+
+ InitScriptRun(aDrawTarget, aTextRun, textPtr + runStart,
+ runStart, runLimit - runStart, runScript, aMFR);
+ }
+ }
+
+ // if shaping was aborted due to lack of feature support, clear out
+ // glyph runs and redo shaping with fallback forced on
+ if (aTextRun->GetShapingState() == gfxTextRun::eShapingState_Aborted) {
+ redo = true;
+ aTextRun->SetShapingState(
+ gfxTextRun::eShapingState_ForceFallbackFeature);
+ aTextRun->ClearGlyphsAndCharacters();
+ }
+
+ } while (redo);
+
+ if (sizeof(T) == sizeof(char16_t) && aLength > 0) {
+ gfxTextRun::CompressedGlyph *glyph = aTextRun->GetCharacterGlyphs();
+ if (!glyph->IsSimpleGlyph()) {
+ glyph->SetClusterStart(true);
+ }
+ }
+
+ // It's possible for CoreText to omit glyph runs if it decides they contain
+ // only invisibles (e.g., U+FEFF, see reftest 474417-1). In this case, we
+ // need to eliminate them from the glyph run array to avoid drawing "partial
+ // ligatures" with the wrong font.
+ // We don't do this during InitScriptRun (or gfxFont::InitTextRun) because
+ // it will iterate back over all glyphruns in the textrun, which leads to
+ // pathologically-bad perf in the case where a textrun contains many script
+ // changes (see bug 680402) - we'd end up re-sanitizing all the earlier runs
+ // every time a new script subrun is processed.
+ aTextRun->SanitizeGlyphRuns();
+
+ aTextRun->SortGlyphRuns();
+}
+
+static inline bool
+IsPUA(uint32_t aUSV)
+{
+ // We could look up the General Category of the codepoint here,
+ // but it's simpler to check PUA codepoint ranges.
+ return (aUSV >= 0xE000 && aUSV <= 0xF8FF) || (aUSV >= 0xF0000);
+}
+
+template<typename T>
+void
+gfxFontGroup::InitScriptRun(DrawTarget* aDrawTarget,
+ gfxTextRun *aTextRun,
+ const T *aString, // text for this script run,
+ // not the entire textrun
+ uint32_t aOffset, // position of the script run
+ // within the textrun
+ uint32_t aLength, // length of the script run
+ Script aRunScript,
+ gfxMissingFontRecorder *aMFR)
+{
+ NS_ASSERTION(aLength > 0, "don't call InitScriptRun for a 0-length run");
+ NS_ASSERTION(aTextRun->GetShapingState() != gfxTextRun::eShapingState_Aborted,
+ "don't call InitScriptRun with aborted shaping state");
+
+ // confirm the load state of userfonts in the list
+ if (!mSkipUpdateUserFonts && mUserFontSet &&
+ mCurrGeneration != mUserFontSet->GetGeneration()) {
+ UpdateUserFonts();
+ }
+
+ gfxFont *mainFont = GetFirstValidFont();
+
+ uint32_t runStart = 0;
+ AutoTArray<gfxTextRange,3> fontRanges;
+ ComputeRanges(fontRanges, aString, aLength, aRunScript,
+ aTextRun->GetFlags() & gfxTextRunFactory::TEXT_ORIENT_MASK);
+ uint32_t numRanges = fontRanges.Length();
+ bool missingChars = false;
+
+ for (uint32_t r = 0; r < numRanges; r++) {
+ const gfxTextRange& range = fontRanges[r];
+ uint32_t matchedLength = range.Length();
+ gfxFont *matchedFont = range.font;
+ bool vertical =
+ range.orientation == gfxTextRunFactory::TEXT_ORIENT_VERTICAL_UPRIGHT;
+ // create the glyph run for this range
+ if (matchedFont && mStyle.noFallbackVariantFeatures) {
+ // common case - just do glyph layout and record the
+ // resulting positioned glyphs
+ aTextRun->AddGlyphRun(matchedFont, range.matchType,
+ aOffset + runStart, (matchedLength > 0),
+ range.orientation);
+ if (!matchedFont->SplitAndInitTextRun(aDrawTarget, aTextRun,
+ aString + runStart,
+ aOffset + runStart,
+ matchedLength,
+ aRunScript,
+ vertical)) {
+ // glyph layout failed! treat as missing glyphs
+ matchedFont = nullptr;
+ }
+ } else if (matchedFont) {
+ // shape with some variant feature that requires fallback handling
+ bool petiteToSmallCaps = false;
+ bool syntheticLower = false;
+ bool syntheticUpper = false;
+
+ if (mStyle.variantSubSuper != NS_FONT_VARIANT_POSITION_NORMAL &&
+ (aTextRun->GetShapingState() ==
+ gfxTextRun::eShapingState_ForceFallbackFeature ||
+ !matchedFont->SupportsSubSuperscript(mStyle.variantSubSuper,
+ aString, aLength,
+ aRunScript)))
+ {
+ // fallback for subscript/superscript variant glyphs
+
+ // if the feature was already used, abort and force
+ // fallback across the entire textrun
+ gfxTextRun::ShapingState ss = aTextRun->GetShapingState();
+
+ if (ss == gfxTextRun::eShapingState_Normal) {
+ aTextRun->SetShapingState(gfxTextRun::eShapingState_ShapingWithFallback);
+ } else if (ss == gfxTextRun::eShapingState_ShapingWithFeature) {
+ aTextRun->SetShapingState(gfxTextRun::eShapingState_Aborted);
+ return;
+ }
+
+ RefPtr<gfxFont> subSuperFont =
+ matchedFont->GetSubSuperscriptFont(aTextRun->GetAppUnitsPerDevUnit());
+ aTextRun->AddGlyphRun(subSuperFont, range.matchType,
+ aOffset + runStart, (matchedLength > 0),
+ range.orientation);
+ if (!subSuperFont->SplitAndInitTextRun(aDrawTarget, aTextRun,
+ aString + runStart,
+ aOffset + runStart,
+ matchedLength,
+ aRunScript,
+ vertical)) {
+ // glyph layout failed! treat as missing glyphs
+ matchedFont = nullptr;
+ }
+ } else if (mStyle.variantCaps != NS_FONT_VARIANT_CAPS_NORMAL &&
+ !matchedFont->SupportsVariantCaps(aRunScript,
+ mStyle.variantCaps,
+ petiteToSmallCaps,
+ syntheticLower,
+ syntheticUpper))
+ {
+ // fallback for small-caps variant glyphs
+ if (!matchedFont->InitFakeSmallCapsRun(aDrawTarget, aTextRun,
+ aString + runStart,
+ aOffset + runStart,
+ matchedLength,
+ range.matchType,
+ range.orientation,
+ aRunScript,
+ syntheticLower,
+ syntheticUpper)) {
+ matchedFont = nullptr;
+ }
+ } else {
+ // shape normally with variant feature enabled
+ gfxTextRun::ShapingState ss = aTextRun->GetShapingState();
+
+ // adjust the shaping state if necessary
+ if (ss == gfxTextRun::eShapingState_Normal) {
+ aTextRun->SetShapingState(gfxTextRun::eShapingState_ShapingWithFeature);
+ } else if (ss == gfxTextRun::eShapingState_ShapingWithFallback) {
+ // already have shaping results using fallback, need to redo
+ aTextRun->SetShapingState(gfxTextRun::eShapingState_Aborted);
+ return;
+ }
+
+ // do glyph layout and record the resulting positioned glyphs
+ aTextRun->AddGlyphRun(matchedFont, range.matchType,
+ aOffset + runStart, (matchedLength > 0),
+ range.orientation);
+ if (!matchedFont->SplitAndInitTextRun(aDrawTarget, aTextRun,
+ aString + runStart,
+ aOffset + runStart,
+ matchedLength,
+ aRunScript,
+ vertical)) {
+ // glyph layout failed! treat as missing glyphs
+ matchedFont = nullptr;
+ }
+ }
+ } else {
+ aTextRun->AddGlyphRun(mainFont, gfxTextRange::kFontGroup,
+ aOffset + runStart, (matchedLength > 0),
+ range.orientation);
+ }
+
+ if (!matchedFont) {
+ // We need to set cluster boundaries (and mark spaces) so that
+ // surrogate pairs, combining characters, etc behave properly,
+ // even if we don't have glyphs for them
+ aTextRun->SetupClusterBoundaries(aOffset + runStart, aString + runStart,
+ matchedLength);
+
+ // various "missing" characters may need special handling,
+ // so we check for them here
+ uint32_t runLimit = runStart + matchedLength;
+ for (uint32_t index = runStart; index < runLimit; index++) {
+ T ch = aString[index];
+
+ // tab and newline are not to be displayed as hexboxes,
+ // but do need to be recorded in the textrun
+ if (ch == '\n') {
+ aTextRun->SetIsNewline(aOffset + index);
+ continue;
+ }
+ if (ch == '\t') {
+ aTextRun->SetIsTab(aOffset + index);
+ continue;
+ }
+
+ // for 16-bit textruns only, check for surrogate pairs and
+ // special Unicode spaces; omit these checks in 8-bit runs
+ if (sizeof(T) == sizeof(char16_t)) {
+ if (NS_IS_HIGH_SURROGATE(ch) &&
+ index + 1 < aLength &&
+ NS_IS_LOW_SURROGATE(aString[index + 1]))
+ {
+ uint32_t usv =
+ SURROGATE_TO_UCS4(ch, aString[index + 1]);
+ aTextRun->SetMissingGlyph(aOffset + index,
+ usv,
+ mainFont);
+ index++;
+ if (!mSkipDrawing && !IsPUA(usv)) {
+ missingChars = true;
+ }
+ continue;
+ }
+
+ // check if this is a known Unicode whitespace character that
+ // we can render using the space glyph with a custom width
+ gfxFloat wid = mainFont->SynthesizeSpaceWidth(ch);
+ if (wid >= 0.0) {
+ nscoord advance =
+ aTextRun->GetAppUnitsPerDevUnit() * floor(wid + 0.5);
+ if (gfxShapedText::CompressedGlyph::IsSimpleAdvance(advance)) {
+ aTextRun->GetCharacterGlyphs()[aOffset + index].
+ SetSimpleGlyph(advance,
+ mainFont->GetSpaceGlyph());
+ } else {
+ gfxTextRun::DetailedGlyph detailedGlyph;
+ detailedGlyph.mGlyphID = mainFont->GetSpaceGlyph();
+ detailedGlyph.mAdvance = advance;
+ detailedGlyph.mXOffset = detailedGlyph.mYOffset = 0;
+ gfxShapedText::CompressedGlyph g;
+ g.SetComplex(true, true, 1);
+ aTextRun->SetGlyphs(aOffset + index,
+ g, &detailedGlyph);
+ }
+ continue;
+ }
+ }
+
+ if (IsInvalidChar(ch)) {
+ // invalid chars are left as zero-width/invisible
+ continue;
+ }
+
+ // record char code so we can draw a box with the Unicode value
+ aTextRun->SetMissingGlyph(aOffset + index, ch, mainFont);
+ if (!mSkipDrawing && !IsPUA(ch)) {
+ missingChars = true;
+ }
+ }
+ }
+
+ runStart += matchedLength;
+ }
+
+ if (aMFR && missingChars) {
+ aMFR->RecordScript(aRunScript);
+ }
+}
+
+gfxTextRun *
+gfxFontGroup::GetEllipsisTextRun(int32_t aAppUnitsPerDevPixel, uint32_t aFlags,
+ LazyReferenceDrawTargetGetter& aRefDrawTargetGetter)
+{
+ MOZ_ASSERT(!(aFlags & ~TEXT_ORIENT_MASK),
+ "flags here should only be used to specify orientation");
+ if (mCachedEllipsisTextRun &&
+ (mCachedEllipsisTextRun->GetFlags() & TEXT_ORIENT_MASK) == aFlags &&
+ mCachedEllipsisTextRun->GetAppUnitsPerDevUnit() == aAppUnitsPerDevPixel) {
+ return mCachedEllipsisTextRun.get();
+ }
+
+ // Use a Unicode ellipsis if the font supports it,
+ // otherwise use three ASCII periods as fallback.
+ gfxFont* firstFont = GetFirstValidFont(uint32_t(kEllipsisChar[0]));
+ nsString ellipsis = firstFont->HasCharacter(kEllipsisChar[0])
+ ? nsDependentString(kEllipsisChar,
+ ArrayLength(kEllipsisChar) - 1)
+ : nsDependentString(kASCIIPeriodsChar,
+ ArrayLength(kASCIIPeriodsChar) - 1);
+
+ RefPtr<DrawTarget> refDT = aRefDrawTargetGetter.GetRefDrawTarget();
+ Parameters params = {
+ refDT, nullptr, nullptr, nullptr, 0, aAppUnitsPerDevPixel
+ };
+ mCachedEllipsisTextRun =
+ MakeTextRun(ellipsis.get(), ellipsis.Length(), &params,
+ aFlags | TEXT_IS_PERSISTENT, nullptr);
+ if (!mCachedEllipsisTextRun) {
+ return nullptr;
+ }
+ // don't let the presence of a cached ellipsis textrun prolong the
+ // fontgroup's life
+ mCachedEllipsisTextRun->ReleaseFontGroup();
+ return mCachedEllipsisTextRun.get();
+}
+
+already_AddRefed<gfxFont>
+gfxFontGroup::FindFallbackFaceForChar(gfxFontFamily* aFamily, uint32_t aCh,
+ Script aRunScript)
+{
+ GlobalFontMatch data(aCh, aRunScript, &mStyle);
+ aFamily->SearchAllFontsForChar(&data);
+ gfxFontEntry* fe = data.mBestMatch;
+ if (!fe) {
+ return nullptr;
+ }
+
+ bool needsBold = mStyle.weight >= 600 && !fe->IsBold() &&
+ mStyle.allowSyntheticWeight;
+ RefPtr<gfxFont> font = fe->FindOrMakeFont(&mStyle, needsBold);
+ return font.forget();
+}
+
+gfxFloat
+gfxFontGroup::GetUnderlineOffset()
+{
+ if (mUnderlineOffset == UNDERLINE_OFFSET_NOT_SET) {
+ // if the fontlist contains a bad underline font, make the underline
+ // offset the min of the first valid font and bad font underline offsets
+ uint32_t len = mFonts.Length();
+ for (uint32_t i = 0; i < len; i++) {
+ FamilyFace& ff = mFonts[i];
+ if (!ff.IsUserFontContainer() &&
+ !ff.FontEntry()->IsUserFont() &&
+ ff.Family() &&
+ ff.Family()->IsBadUnderlineFamily()) {
+ RefPtr<gfxFont> font = GetFontAt(i);
+ if (!font) {
+ continue;
+ }
+ gfxFloat bad = font->GetMetrics(gfxFont::eHorizontal).
+ underlineOffset;
+ gfxFloat first =
+ GetFirstValidFont()->GetMetrics(gfxFont::eHorizontal).
+ underlineOffset;
+ mUnderlineOffset = std::min(first, bad);
+ return mUnderlineOffset;
+ }
+ }
+
+ // no bad underline fonts, use the first valid font's metric
+ mUnderlineOffset = GetFirstValidFont()->
+ GetMetrics(gfxFont::eHorizontal).underlineOffset;
+ }
+
+ return mUnderlineOffset;
+}
+
+already_AddRefed<gfxFont>
+gfxFontGroup::FindFontForChar(uint32_t aCh, uint32_t aPrevCh, uint32_t aNextCh,
+ Script aRunScript, gfxFont *aPrevMatchedFont,
+ uint8_t *aMatchType)
+{
+ // If the char is a cluster extender, we want to use the same font as the
+ // preceding character if possible. This is preferable to using the font
+ // group because it avoids breaks in shaping within a cluster.
+ if (aPrevMatchedFont && IsClusterExtender(aCh) &&
+ aPrevMatchedFont->HasCharacter(aCh)) {
+ RefPtr<gfxFont> ret = aPrevMatchedFont;
+ return ret.forget();
+ }
+
+ // Special cases for NNBSP (as used in Mongolian):
+ const uint32_t NARROW_NO_BREAK_SPACE = 0x202f;
+ if (aCh == NARROW_NO_BREAK_SPACE) {
+ // If there is no preceding character, try the font that we'd use
+ // for the next char (unless it's just another NNBSP; we don't try
+ // to look ahead through a whole run of them).
+ if (!aPrevCh && aNextCh && aNextCh != NARROW_NO_BREAK_SPACE) {
+ RefPtr<gfxFont> nextFont =
+ FindFontForChar(aNextCh, 0, 0, aRunScript, aPrevMatchedFont,
+ aMatchType);
+ if (nextFont && nextFont->HasCharacter(aCh)) {
+ return nextFont.forget();
+ }
+ }
+ // Otherwise, treat NNBSP like a cluster extender (as above) and try
+ // to continue the preceding font run.
+ if (aPrevMatchedFont && aPrevMatchedFont->HasCharacter(aCh)) {
+ RefPtr<gfxFont> ret = aPrevMatchedFont;
+ return ret.forget();
+ }
+ }
+
+ // To optimize common cases, try the first font in the font-group
+ // before going into the more detailed checks below
+ uint32_t nextIndex = 0;
+ bool isJoinControl = gfxFontUtils::IsJoinControl(aCh);
+ bool wasJoinCauser = gfxFontUtils::IsJoinCauser(aPrevCh);
+ bool isVarSelector = gfxFontUtils::IsVarSelector(aCh);
+
+ if (!isJoinControl && !wasJoinCauser && !isVarSelector) {
+ RefPtr<gfxFont> firstFont = GetFontAt(0, aCh);
+ if (firstFont) {
+ if (firstFont->HasCharacter(aCh)) {
+ *aMatchType = gfxTextRange::kFontGroup;
+ return firstFont.forget();
+ }
+
+ RefPtr<gfxFont> font;
+ if (mFonts[0].CheckForFallbackFaces()) {
+ font = FindFallbackFaceForChar(mFonts[0].Family(), aCh,
+ aRunScript);
+ } else if (!firstFont->GetFontEntry()->IsUserFont()) {
+ // For platform fonts (but not userfonts), we may need to do
+ // fallback within the family to handle cases where some faces
+ // such as Italic or Black have reduced character sets compared
+ // to the family's Regular face.
+ gfxFontEntry* fe = firstFont->GetFontEntry();
+ if (!fe->IsUpright() ||
+ fe->Weight() != NS_FONT_WEIGHT_NORMAL ||
+ fe->Stretch() != NS_FONT_STRETCH_NORMAL) {
+ // If style/weight/stretch was not Normal, see if we can
+ // fall back to a next-best face (e.g. Arial Black -> Bold,
+ // or Arial Narrow -> Regular).
+ font = FindFallbackFaceForChar(mFonts[0].Family(), aCh,
+ aRunScript);
+ }
+ }
+ if (font) {
+ *aMatchType = gfxTextRange::kFontGroup;
+ return font.forget();
+ }
+ }
+
+ // we don't need to check the first font again below
+ ++nextIndex;
+ }
+
+ if (aPrevMatchedFont) {
+ // Don't switch fonts for control characters, regardless of
+ // whether they are present in the current font, as they won't
+ // actually be rendered (see bug 716229)
+ if (isJoinControl ||
+ GetGeneralCategory(aCh) == HB_UNICODE_GENERAL_CATEGORY_CONTROL) {
+ RefPtr<gfxFont> ret = aPrevMatchedFont;
+ return ret.forget();
+ }
+
+ // if previous character was a join-causer (ZWJ),
+ // use the same font as the previous range if we can
+ if (wasJoinCauser) {
+ if (aPrevMatchedFont->HasCharacter(aCh)) {
+ RefPtr<gfxFont> ret = aPrevMatchedFont;
+ return ret.forget();
+ }
+ }
+ }
+
+ // if this character is a variation selector,
+ // use the previous font regardless of whether it supports VS or not.
+ // otherwise the text run will be divided.
+ if (isVarSelector) {
+ if (aPrevMatchedFont) {
+ RefPtr<gfxFont> ret = aPrevMatchedFont;
+ return ret.forget();
+ }
+ // VS alone. it's meaningless to search different fonts
+ return nullptr;
+ }
+
+ // 1. check remaining fonts in the font group
+ uint32_t fontListLength = mFonts.Length();
+ for (uint32_t i = nextIndex; i < fontListLength; i++) {
+ FamilyFace& ff = mFonts[i];
+ if (ff.IsInvalid() || ff.IsLoading()) {
+ continue;
+ }
+
+ // if available, use already made gfxFont and check for character
+ RefPtr<gfxFont> font = ff.Font();
+ if (font) {
+ if (font->HasCharacter(aCh)) {
+ return font.forget();
+ }
+ continue;
+ }
+
+ // don't have a gfxFont yet, test before building
+ gfxFontEntry *fe = ff.FontEntry();
+ if (fe->mIsUserFontContainer) {
+ // for userfonts, need to test both the unicode range map and
+ // the cmap of the platform font entry
+ gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
+
+ // never match a character outside the defined unicode range
+ if (!ufe->CharacterInUnicodeRange(aCh)) {
+ continue;
+ }
+
+ // load if not already loaded but only if no other font in similar
+ // range within family is loading
+ if (ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED &&
+ !FontLoadingForFamily(ff.Family(), aCh)) {
+ ufe->Load();
+ ff.CheckState(mSkipDrawing);
+ }
+ gfxFontEntry* pfe = ufe->GetPlatformFontEntry();
+ if (pfe && pfe->HasCharacter(aCh)) {
+ font = GetFontAt(i, aCh);
+ if (font) {
+ *aMatchType = gfxTextRange::kFontGroup;
+ return font.forget();
+ }
+ }
+ } else if (fe->HasCharacter(aCh)) {
+ // for normal platform fonts, after checking the cmap
+ // build the font via GetFontAt
+ font = GetFontAt(i, aCh);
+ if (font) {
+ *aMatchType = gfxTextRange::kFontGroup;
+ return font.forget();
+ }
+ }
+
+ // check other family faces if needed
+ if (ff.CheckForFallbackFaces()) {
+ NS_ASSERTION(i == 0 ? true :
+ !mFonts[i-1].CheckForFallbackFaces() ||
+ !mFonts[i-1].Family()->Name().Equals(ff.Family()->Name()),
+ "should only do fallback once per font family");
+ font = FindFallbackFaceForChar(ff.Family(), aCh, aRunScript);
+ if (font) {
+ *aMatchType = gfxTextRange::kFontGroup;
+ return font.forget();
+ }
+ } else {
+ // For platform fonts, but not user fonts, consider intra-family
+ // fallback to handle styles with reduced character sets (see
+ // also above).
+ fe = ff.FontEntry();
+ if (!fe->mIsUserFontContainer && !fe->IsUserFont() &&
+ (!fe->IsUpright() ||
+ fe->Weight() != NS_FONT_WEIGHT_NORMAL ||
+ fe->Stretch() != NS_FONT_STRETCH_NORMAL)) {
+ font = FindFallbackFaceForChar(ff.Family(), aCh, aRunScript);
+ if (font) {
+ *aMatchType = gfxTextRange::kFontGroup;
+ return font.forget();
+ }
+ }
+ }
+ }
+
+ if (fontListLength == 0) {
+ RefPtr<gfxFont> defaultFont = GetDefaultFont();
+ if (defaultFont->HasCharacter(aCh)) {
+ *aMatchType = gfxTextRange::kFontGroup;
+ return defaultFont.forget();
+ }
+ }
+
+ // if character is in Private Use Area, don't do matching against pref or system fonts
+ if ((aCh >= 0xE000 && aCh <= 0xF8FF) || (aCh >= 0xF0000 && aCh <= 0x10FFFD))
+ return nullptr;
+
+ // 2. search pref fonts
+ RefPtr<gfxFont> font = WhichPrefFontSupportsChar(aCh);
+ if (font) {
+ *aMatchType = gfxTextRange::kPrefsFallback;
+ return font.forget();
+ }
+
+ // 3. use fallback fonts
+ // -- before searching for something else check the font used for the previous character
+ if (aPrevMatchedFont && aPrevMatchedFont->HasCharacter(aCh)) {
+ *aMatchType = gfxTextRange::kSystemFallback;
+ RefPtr<gfxFont> ret = aPrevMatchedFont;
+ return ret.forget();
+ }
+
+ // for known "space" characters, don't do a full system-fallback search;
+ // we'll synthesize appropriate-width spaces instead of missing-glyph boxes
+ if (GetGeneralCategory(aCh) ==
+ HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR &&
+ GetFirstValidFont()->SynthesizeSpaceWidth(aCh) >= 0.0)
+ {
+ return nullptr;
+ }
+
+ // -- otherwise look for other stuff
+ *aMatchType = gfxTextRange::kSystemFallback;
+ font = WhichSystemFontSupportsChar(aCh, aNextCh, aRunScript);
+ return font.forget();
+}
+
+template<typename T>
+void gfxFontGroup::ComputeRanges(nsTArray<gfxTextRange>& aRanges,
+ const T *aString, uint32_t aLength,
+ Script aRunScript, uint16_t aOrientation)
+{
+ NS_ASSERTION(aRanges.Length() == 0, "aRanges must be initially empty");
+ NS_ASSERTION(aLength > 0, "don't call ComputeRanges for zero-length text");
+
+ uint32_t prevCh = 0;
+ uint32_t nextCh = aString[0];
+ if (sizeof(T) == sizeof(char16_t)) {
+ if (aLength > 1 && NS_IS_HIGH_SURROGATE(nextCh) &&
+ NS_IS_LOW_SURROGATE(aString[1])) {
+ nextCh = SURROGATE_TO_UCS4(nextCh, aString[1]);
+ }
+ }
+ int32_t lastRangeIndex = -1;
+
+ // initialize prevFont to the group's primary font, so that this will be
+ // used for string-initial control chars, etc rather than risk hitting font
+ // fallback for these (bug 716229)
+ gfxFont *prevFont = GetFirstValidFont();
+
+ // if we use the initial value of prevFont, we treat this as a match from
+ // the font group; fixes bug 978313
+ uint8_t matchType = gfxTextRange::kFontGroup;
+
+ for (uint32_t i = 0; i < aLength; i++) {
+
+ const uint32_t origI = i; // save off in case we increase for surrogate
+
+ // set up current ch
+ uint32_t ch = nextCh;
+
+ // Get next char (if any) so that FindFontForChar can look ahead
+ // for a possible variation selector.
+
+ if (sizeof(T) == sizeof(char16_t)) {
+ // In 16-bit case only, check for surrogate pairs.
+ if (ch > 0xffffu) {
+ i++;
+ }
+ if (i < aLength - 1) {
+ nextCh = aString[i + 1];
+ if ((i + 2 < aLength) && NS_IS_HIGH_SURROGATE(nextCh) &&
+ NS_IS_LOW_SURROGATE(aString[i + 2])) {
+ nextCh = SURROGATE_TO_UCS4(nextCh, aString[i + 2]);
+ }
+ } else {
+ nextCh = 0;
+ }
+ } else {
+ // 8-bit case is trivial.
+ nextCh = i < aLength - 1 ? aString[i + 1] : 0;
+ }
+
+ if (ch == 0xa0) {
+ ch = ' ';
+ }
+
+ // find the font for this char
+ RefPtr<gfxFont> font =
+ FindFontForChar(ch, prevCh, nextCh, aRunScript, prevFont,
+ &matchType);
+
+#ifndef RELEASE_OR_BETA
+ if (MOZ_UNLIKELY(mTextPerf)) {
+ if (matchType == gfxTextRange::kPrefsFallback) {
+ mTextPerf->current.fallbackPrefs++;
+ } else if (matchType == gfxTextRange::kSystemFallback) {
+ mTextPerf->current.fallbackSystem++;
+ }
+ }
+#endif
+
+ prevCh = ch;
+
+ uint16_t orient = aOrientation;
+ if (aOrientation == gfxTextRunFactory::TEXT_ORIENT_VERTICAL_MIXED) {
+ // For CSS text-orientation:mixed, we need to resolve orientation
+ // on a per-character basis using the UTR50 orientation property.
+ switch (GetVerticalOrientation(ch)) {
+ case VERTICAL_ORIENTATION_U:
+ case VERTICAL_ORIENTATION_Tr:
+ case VERTICAL_ORIENTATION_Tu:
+ orient = TEXT_ORIENT_VERTICAL_UPRIGHT;
+ break;
+ case VERTICAL_ORIENTATION_R:
+ orient = TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
+ break;
+ }
+ }
+
+ if (lastRangeIndex == -1) {
+ // first char ==> make a new range
+ aRanges.AppendElement(gfxTextRange(0, 1, font, matchType, orient));
+ lastRangeIndex++;
+ prevFont = font;
+ } else {
+ // if font or orientation has changed, make a new range...
+ // unless ch is a variation selector (bug 1248248)
+ gfxTextRange& prevRange = aRanges[lastRangeIndex];
+ if (prevRange.font != font || prevRange.matchType != matchType ||
+ (prevRange.orientation != orient && !IsClusterExtender(ch))) {
+ // close out the previous range
+ prevRange.end = origI;
+ aRanges.AppendElement(gfxTextRange(origI, i + 1,
+ font, matchType, orient));
+ lastRangeIndex++;
+
+ // update prevFont for the next match, *unless* we switched
+ // fonts on a ZWJ, in which case propagating the changed font
+ // is probably not a good idea (see bug 619511)
+ if (sizeof(T) == sizeof(uint8_t) ||
+ !gfxFontUtils::IsJoinCauser(ch))
+ {
+ prevFont = font;
+ }
+ }
+ }
+ }
+
+ aRanges[lastRangeIndex].end = aLength;
+
+#ifndef RELEASE_OR_BETA
+ LogModule* log = mStyle.systemFont
+ ? gfxPlatform::GetLog(eGfxLog_textrunui)
+ : gfxPlatform::GetLog(eGfxLog_textrun);
+
+ if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Debug))) {
+ nsAutoCString lang;
+ mStyle.language->ToUTF8String(lang);
+ nsAutoString families;
+ mFamilyList.ToString(families);
+
+ // collect the font matched for each range
+ nsAutoCString fontMatches;
+ for (size_t i = 0, i_end = aRanges.Length(); i < i_end; i++) {
+ const gfxTextRange& r = aRanges[i];
+ fontMatches.AppendPrintf(" [%u:%u] %.200s (%s)", r.start, r.end,
+ (r.font.get() ?
+ NS_ConvertUTF16toUTF8(r.font->GetName()).get() : "<null>"),
+ (r.matchType == gfxTextRange::kFontGroup ?
+ "list" :
+ (r.matchType == gfxTextRange::kPrefsFallback) ?
+ "prefs" : "sys"));
+ }
+ MOZ_LOG(log, LogLevel::Debug,\
+ ("(%s-fontmatching) fontgroup: [%s] default: %s lang: %s script: %d"
+ "%s\n",
+ (mStyle.systemFont ? "textrunui" : "textrun"),
+ NS_ConvertUTF16toUTF8(families).get(),
+ (mFamilyList.GetDefaultFontType() == eFamily_serif ?
+ "serif" :
+ (mFamilyList.GetDefaultFontType() == eFamily_sans_serif ?
+ "sans-serif" : "none")),
+ lang.get(), aRunScript,
+ fontMatches.get()));
+ }
+#endif
+}
+
+gfxUserFontSet*
+gfxFontGroup::GetUserFontSet()
+{
+ return mUserFontSet;
+}
+
+void
+gfxFontGroup::SetUserFontSet(gfxUserFontSet *aUserFontSet)
+{
+ if (aUserFontSet == mUserFontSet) {
+ return;
+ }
+ mUserFontSet = aUserFontSet;
+ mCurrGeneration = GetGeneration() - 1;
+ UpdateUserFonts();
+}
+
+uint64_t
+gfxFontGroup::GetGeneration()
+{
+ if (!mUserFontSet)
+ return 0;
+ return mUserFontSet->GetGeneration();
+}
+
+uint64_t
+gfxFontGroup::GetRebuildGeneration()
+{
+ if (!mUserFontSet)
+ return 0;
+ return mUserFontSet->GetRebuildGeneration();
+}
+
+// note: gfxPangoFontGroup overrides UpdateUserFonts, such that
+// BuildFontList is never used
+void
+gfxFontGroup::UpdateUserFonts()
+{
+ if (mCurrGeneration < GetRebuildGeneration()) {
+ // fonts in userfont set changed, need to redo the fontlist
+ mFonts.Clear();
+ ClearCachedData();
+ BuildFontList();
+ mCurrGeneration = GetGeneration();
+ } else if (mCurrGeneration != GetGeneration()) {
+ // load state change occurred, verify load state and validity of fonts
+ ClearCachedData();
+
+ uint32_t len = mFonts.Length();
+ for (uint32_t i = 0; i < len; i++) {
+ FamilyFace& ff = mFonts[i];
+ if (ff.Font() || !ff.IsUserFontContainer()) {
+ continue;
+ }
+ ff.CheckState(mSkipDrawing);
+ }
+
+ mCurrGeneration = GetGeneration();
+ }
+}
+
+bool
+gfxFontGroup::ContainsUserFont(const gfxUserFontEntry* aUserFont)
+{
+ UpdateUserFonts();
+ // search through the fonts list for a specific user font
+ uint32_t len = mFonts.Length();
+ for (uint32_t i = 0; i < len; i++) {
+ FamilyFace& ff = mFonts[i];
+ if (ff.EqualsUserFont(aUserFont)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+already_AddRefed<gfxFont>
+gfxFontGroup::WhichPrefFontSupportsChar(uint32_t aCh)
+{
+ RefPtr<gfxFont> font;
+
+ // get the pref font list if it hasn't been set up already
+ uint32_t unicodeRange = FindCharUnicodeRange(aCh);
+ gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
+ eFontPrefLang charLang = pfl->GetFontPrefLangFor(unicodeRange);
+
+ // if the last pref font was the first family in the pref list, no need to recheck through a list of families
+ if (mLastPrefFont && charLang == mLastPrefLang &&
+ mLastPrefFirstFont && mLastPrefFont->HasCharacter(aCh)) {
+ font = mLastPrefFont;
+ return font.forget();
+ }
+
+ // based on char lang and page lang, set up list of pref lang fonts to check
+ eFontPrefLang prefLangs[kMaxLenPrefLangList];
+ uint32_t i, numLangs = 0;
+
+ pfl->GetLangPrefs(prefLangs, numLangs, charLang, mPageLang);
+
+ for (i = 0; i < numLangs; i++) {
+ eFontPrefLang currentLang = prefLangs[i];
+ mozilla::FontFamilyType defaultGeneric =
+ pfl->GetDefaultGeneric(currentLang);
+ nsTArray<RefPtr<gfxFontFamily>>* families =
+ pfl->GetPrefFontsLangGroup(defaultGeneric, currentLang);
+ NS_ASSERTION(families, "no pref font families found");
+
+ // find the first pref font that includes the character
+ uint32_t j, numPrefs;
+ numPrefs = families->Length();
+ for (j = 0; j < numPrefs; j++) {
+ // look up the appropriate face
+ gfxFontFamily *family = (*families)[j];
+ if (!family) continue;
+
+ // if a pref font is used, it's likely to be used again in the same text run.
+ // the style doesn't change so the face lookup can be cached rather than calling
+ // FindOrMakeFont repeatedly. speeds up FindFontForChar lookup times for subsequent
+ // pref font lookups
+ if (family == mLastPrefFamily && mLastPrefFont->HasCharacter(aCh)) {
+ font = mLastPrefFont;
+ return font.forget();
+ }
+
+ bool needsBold;
+ gfxFontEntry *fe = family->FindFontForStyle(mStyle, needsBold);
+ // if ch in cmap, create and return a gfxFont
+ if (fe && fe->HasCharacter(aCh)) {
+ RefPtr<gfxFont> prefFont = fe->FindOrMakeFont(&mStyle, needsBold);
+ if (!prefFont) continue;
+ mLastPrefFamily = family;
+ mLastPrefFont = prefFont;
+ mLastPrefLang = charLang;
+ mLastPrefFirstFont = (i == 0 && j == 0);
+ return prefFont.forget();
+ }
+
+ }
+ }
+
+ return nullptr;
+}
+
+already_AddRefed<gfxFont>
+gfxFontGroup::WhichSystemFontSupportsChar(uint32_t aCh, uint32_t aNextCh,
+ Script aRunScript)
+{
+ gfxFontEntry *fe =
+ gfxPlatformFontList::PlatformFontList()->
+ SystemFindFontForChar(aCh, aNextCh, aRunScript, &mStyle);
+ if (fe) {
+ bool wantBold = mStyle.ComputeWeight() >= 6;
+ RefPtr<gfxFont> font =
+ fe->FindOrMakeFont(&mStyle, wantBold && !fe->IsBold());
+ return font.forget();
+ }
+
+ return nullptr;
+}
+
+/*static*/ void
+gfxFontGroup::Shutdown()
+{
+ NS_IF_RELEASE(gLangService);
+}
+
+nsILanguageAtomService* gfxFontGroup::gLangService = nullptr;
+
+void
+gfxMissingFontRecorder::Flush()
+{
+ static bool mNotifiedFontsInitialized = false;
+ static uint32_t mNotifiedFonts[gfxMissingFontRecorder::kNumScriptBitsWords];
+ if (!mNotifiedFontsInitialized) {
+ memset(&mNotifiedFonts, 0, sizeof(mNotifiedFonts));
+ mNotifiedFontsInitialized = true;
+ }
+
+ nsAutoString fontNeeded;
+ for (uint32_t i = 0; i < kNumScriptBitsWords; ++i) {
+ mMissingFonts[i] &= ~mNotifiedFonts[i];
+ if (!mMissingFonts[i]) {
+ continue;
+ }
+ for (uint32_t j = 0; j < 32; ++j) {
+ if (!(mMissingFonts[i] & (1 << j))) {
+ continue;
+ }
+ mNotifiedFonts[i] |= (1 << j);
+ if (!fontNeeded.IsEmpty()) {
+ fontNeeded.Append(char16_t(','));
+ }
+ uint32_t sc = i * 32 + j;
+ MOZ_ASSERT(sc < static_cast<uint32_t>(Script::NUM_SCRIPT_CODES),
+ "how did we set the bit for an invalid script code?");
+ uint32_t tag = GetScriptTagForCode(static_cast<Script>(sc));
+ fontNeeded.Append(char16_t(tag >> 24));
+ fontNeeded.Append(char16_t((tag >> 16) & 0xff));
+ fontNeeded.Append(char16_t((tag >> 8) & 0xff));
+ fontNeeded.Append(char16_t(tag & 0xff));
+ }
+ mMissingFonts[i] = 0;
+ }
+ if (!fontNeeded.IsEmpty()) {
+ nsCOMPtr<nsIObserverService> service = GetObserverService();
+ service->NotifyObservers(nullptr, "font-needed", fontNeeded.get());
+ }
+}