Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 243 insertions, 0 deletions

diff --git a/gfx/thebes/gfxFT2Fonts.cpp b/gfx/thebes/gfxFT2Fonts.cpp
new file mode 100644
index 0000000000..9cc3a4bfd5
--- /dev/null
+++ b/gfx/thebes/gfxFT2Fonts.cpp
@@ -0,0 +1,243 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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/. */
+
+#if defined(MOZ_WIDGET_GTK)
+#  include "gfxPlatformGtk.h"
+#  define gfxToolkitPlatform gfxPlatformGtk
+#elif defined(XP_WIN)
+#  include "gfxWindowsPlatform.h"
+#  define gfxToolkitPlatform gfxWindowsPlatform
+#elif defined(ANDROID)
+#  include "gfxAndroidPlatform.h"
+#  define gfxToolkitPlatform gfxAndroidPlatform
+#endif
+
+#include "gfxTypes.h"
+#include "gfxFT2Fonts.h"
+#include "gfxFT2FontBase.h"
+#include "gfxFT2Utils.h"
+#include "gfxFT2FontList.h"
+#include "gfxTextRun.h"
+#include <locale.h>
+#include "nsGkAtoms.h"
+#include "nsTArray.h"
+#include "nsCRT.h"
+#include "nsXULAppAPI.h"
+
+#include "mozilla/Logging.h"
+#include "prinit.h"
+
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/gfx/2D.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+/**
+ * gfxFT2Font
+ */
+
+bool gfxFT2Font::ShapeText(DrawTarget* aDrawTarget, const char16_t* aText,
+                           uint32_t aOffset, uint32_t aLength, Script aScript,
+                           nsAtom* aLanguage, bool aVertical,
+                           RoundingFlags aRounding,
+                           gfxShapedText* aShapedText) {
+  if (!gfxFont::ShapeText(aDrawTarget, aText, aOffset, aLength, aScript,
+                          aLanguage, aVertical, aRounding, aShapedText)) {
+    // harfbuzz must have failed(?!), just render raw glyphs
+    AddRange(aText, aOffset, aLength, aShapedText);
+    PostShapingFixup(aDrawTarget, aText, aOffset, aLength, aVertical,
+                     aShapedText);
+  }
+
+  return true;
+}
+
+void gfxFT2Font::AddRange(const char16_t* aText, uint32_t aOffset,
+                          uint32_t aLength, gfxShapedText* aShapedText) {
+  typedef gfxShapedText::CompressedGlyph CompressedGlyph;
+
+  const uint32_t appUnitsPerDevUnit = aShapedText->GetAppUnitsPerDevUnit();
+  // we'll pass this in/figure it out dynamically, but at this point there can
+  // be only one face.
+  gfxFT2LockedFace faceLock(this);
+  FT_Face face = faceLock.get();
+
+  CompressedGlyph* charGlyphs = aShapedText->GetCharacterGlyphs();
+
+  const gfxFT2Font::CachedGlyphData *cgd = nullptr, *cgdNext = nullptr;
+
+  FT_UInt spaceGlyph = GetSpaceGlyph();
+
+  for (uint32_t i = 0; i < aLength; i++, aOffset++) {
+    char16_t ch = aText[i];
+
+    if (ch == 0) {
+      // treat this null byte as a missing glyph, don't create a glyph for it
+      aShapedText->SetMissingGlyph(aOffset, 0, this);
+      continue;
+    }
+
+    NS_ASSERTION(!gfxFontGroup::IsInvalidChar(ch), "Invalid char detected");
+
+    if (cgdNext) {
+      cgd = cgdNext;
+      cgdNext = nullptr;
+    } else {
+      cgd = GetGlyphDataForChar(face, ch);
+    }
+
+    FT_UInt gid = cgd->glyphIndex;
+    int32_t advance = 0;
+
+    if (gid == 0) {
+      advance = -1;  // trigger the missing glyphs case below
+    } else {
+      // find next character and its glyph -- in case they exist
+      // and exist in the current font face -- to compute kerning
+      char16_t chNext = 0;
+      FT_UInt gidNext = 0;
+      FT_Pos lsbDeltaNext = 0;
+
+      if (FT_HAS_KERNING(face) && i + 1 < aLength) {
+        chNext = aText[i + 1];
+        if (chNext != 0) {
+          cgdNext = GetGlyphDataForChar(face, chNext);
+          gidNext = cgdNext->glyphIndex;
+          if (gidNext && gidNext != spaceGlyph)
+            lsbDeltaNext = cgdNext->lsbDelta;
+        }
+      }
+
+      advance = cgd->xAdvance;
+
+      // now add kerning to the current glyph's advance
+      if (chNext && gidNext) {
+        FT_Vector kerning;
+        kerning.x = 0;
+        FT_Get_Kerning(face, gid, gidNext, FT_KERNING_DEFAULT, &kerning);
+        advance += kerning.x;
+        if (cgd->rsbDelta - lsbDeltaNext >= 32) {
+          advance -= 64;
+        } else if (cgd->rsbDelta - lsbDeltaNext < -32) {
+          advance += 64;
+        }
+      }
+
+      // convert 26.6 fixed point to app units
+      // round rather than truncate to nearest pixel
+      // because these advances are often scaled
+      advance = ((advance * appUnitsPerDevUnit + 32) >> 6);
+    }
+
+    if (advance >= 0 && CompressedGlyph::IsSimpleAdvance(advance) &&
+        CompressedGlyph::IsSimpleGlyphID(gid)) {
+      charGlyphs[aOffset].SetSimpleGlyph(advance, gid);
+    } else if (gid == 0) {
+      // gid = 0 only happens when the glyph is missing from the font
+      aShapedText->SetMissingGlyph(aOffset, ch, this);
+    } else {
+      gfxTextRun::DetailedGlyph details;
+      details.mGlyphID = gid;
+      NS_ASSERTION(details.mGlyphID == gid,
+                   "Seriously weird glyph ID detected!");
+      details.mAdvance = advance;
+      aShapedText->SetDetailedGlyphs(aOffset, 1, &details);
+    }
+  }
+}
+
+gfxFT2Font::gfxFT2Font(const RefPtr<UnscaledFontFreeType>& aUnscaledFont,
+                       RefPtr<mozilla::gfx::SharedFTFace>&& aFTFace,
+                       FT2FontEntry* aFontEntry, const gfxFontStyle* aFontStyle,
+                       int aLoadFlags)
+    : gfxFT2FontBase(aUnscaledFont, std::move(aFTFace), aFontEntry, aFontStyle,
+                     aLoadFlags, aFontStyle->NeedsSyntheticBold(aFontEntry)),
+      mCharGlyphCache(32) {
+  NS_ASSERTION(mFontEntry,
+               "Unable to find font entry for font.  Something is whack.");
+  InitMetrics();
+}
+
+gfxFT2Font::~gfxFT2Font() {}
+
+already_AddRefed<ScaledFont> gfxFT2Font::GetScaledFont(
+    const TextRunDrawParams& aRunParams) {
+  if (ScaledFont* scaledFont = mAzureScaledFont) {
+    return do_AddRef(scaledFont);
+  }
+
+  RefPtr<ScaledFont> newScaledFont = Factory::CreateScaledFontForFreeTypeFont(
+      GetUnscaledFont(), GetAdjustedSize(), mFTFace,
+      GetStyle()->NeedsSyntheticBold(GetFontEntry()));
+  if (!newScaledFont) {
+    return nullptr;
+  }
+
+  InitializeScaledFont(newScaledFont);
+
+  if (mAzureScaledFont.compareExchange(nullptr, newScaledFont.get())) {
+    Unused << newScaledFont.forget();
+  }
+  ScaledFont* scaledFont = mAzureScaledFont;
+  return do_AddRef(scaledFont);
+}
+
+bool gfxFT2Font::ShouldHintMetrics() const {
+  return !gfxPlatform::GetPlatform()->RequiresLinearZoom();
+}
+
+void gfxFT2Font::FillGlyphDataForChar(FT_Face face, uint32_t ch,
+                                      CachedGlyphData* gd) {
+  if (!face->charmap || (face->charmap->encoding != FT_ENCODING_UNICODE &&
+                         face->charmap->encoding != FT_ENCODING_MS_SYMBOL)) {
+    if (FT_Err_Ok != FT_Select_Charmap(face, FT_ENCODING_UNICODE) &&
+        FT_Err_Ok != FT_Select_Charmap(face, FT_ENCODING_MS_SYMBOL)) {
+      NS_WARNING("failed to select Unicode or symbol charmap!");
+    }
+  }
+  FT_UInt gid = FT_Get_Char_Index(face, ch);
+
+  if (gid == 0) {
+    // this font doesn't support this char!
+    NS_ASSERTION(gid != 0,
+                 "We don't have a glyph, but font indicated that it supported "
+                 "this char in tables?");
+    gd->glyphIndex = 0;
+    return;
+  }
+
+  FT_Error err = Factory::LoadFTGlyph(face, gid, mFTLoadFlags);
+
+  if (err) {
+    // hmm, this is weird, we failed to load a glyph that we had?
+    NS_WARNING("Failed to load glyph that we got from Get_Char_index");
+
+    gd->glyphIndex = 0;
+    return;
+  }
+
+  gd->glyphIndex = gid;
+  gd->lsbDelta = face->glyph->lsb_delta;
+  gd->rsbDelta = face->glyph->rsb_delta;
+  gd->xAdvance = face->glyph->advance.x;
+  if (gd->xAdvance) {
+    gd->xAdvance += GetEmboldenStrength(face).x;
+  }
+}
+
+void gfxFT2Font::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
+                                        FontCacheSizes* aSizes) const {
+  gfxFont::AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
+  aSizes->mFontInstances +=
+      mCharGlyphCache.ShallowSizeOfExcludingThis(aMallocSizeOf);
+}
+
+void gfxFT2Font::AddSizeOfIncludingThis(MallocSizeOf aMallocSizeOf,
+                                        FontCacheSizes* aSizes) const {
+  aSizes->mFontInstances += aMallocSizeOf(this);
+  AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
+}