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-rw-r--r--gfx/thebes/gfxFT2Fonts.cpp243
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diff --git a/gfx/thebes/gfxFT2Fonts.cpp b/gfx/thebes/gfxFT2Fonts.cpp
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+/* -*- 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-13 17:51:31 +0000