mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 14:15:30 +00:00
294 lines
9.5 KiB
C++
294 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#if defined(MOZ_WIDGET_GTK)
|
|
#include "gfxPlatformGtk.h"
|
|
#define gfxToolkitPlatform gfxPlatformGtk
|
|
#elif defined(MOZ_WIDGET_QT)
|
|
#include <qfontinfo.h>
|
|
#include "gfxQtPlatform.h"
|
|
#define gfxToolkitPlatform gfxQtPlatform
|
|
#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 "nsUnicodeRange.h"
|
|
#include "nsCRT.h"
|
|
#include "nsXULAppAPI.h"
|
|
|
|
#include "prlog.h"
|
|
#include "prinit.h"
|
|
|
|
#include "mozilla/MemoryReporting.h"
|
|
#include "mozilla/Preferences.h"
|
|
#include "mozilla/gfx/2D.h"
|
|
|
|
/**
|
|
* gfxFT2Font
|
|
*/
|
|
|
|
bool
|
|
gfxFT2Font::ShapeText(gfxContext *aContext,
|
|
const char16_t *aText,
|
|
uint32_t aOffset,
|
|
uint32_t aLength,
|
|
int32_t aScript,
|
|
bool aVertical,
|
|
gfxShapedText *aShapedText)
|
|
{
|
|
if (!gfxFont::ShapeText(aContext, aText, aOffset, aLength, aScript,
|
|
aVertical, aShapedText)) {
|
|
// harfbuzz must have failed(?!), just render raw glyphs
|
|
AddRange(aText, aOffset, aLength, aShapedText);
|
|
PostShapingFixup(aContext, aText, aOffset, aLength, aShapedText);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
gfxFT2Font::AddRange(const char16_t *aText, uint32_t aOffset,
|
|
uint32_t aLength, gfxShapedText *aShapedText)
|
|
{
|
|
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();
|
|
|
|
gfxShapedText::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(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(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 &&
|
|
gfxShapedText::CompressedGlyph::IsSimpleAdvance(advance) &&
|
|
gfxShapedText::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;
|
|
details.mXOffset = 0;
|
|
details.mYOffset = 0;
|
|
gfxShapedText::CompressedGlyph g;
|
|
g.SetComplex(charGlyphs[aOffset].IsClusterStart(), true, 1);
|
|
aShapedText->SetGlyphs(aOffset, g, &details);
|
|
}
|
|
}
|
|
}
|
|
|
|
gfxFT2Font::gfxFT2Font(cairo_scaled_font_t *aCairoFont,
|
|
FT2FontEntry *aFontEntry,
|
|
const gfxFontStyle *aFontStyle,
|
|
bool aNeedsBold)
|
|
: gfxFT2FontBase(aCairoFont, aFontEntry, aFontStyle)
|
|
, mCharGlyphCache(32)
|
|
{
|
|
NS_ASSERTION(mFontEntry, "Unable to find font entry for font. Something is whack.");
|
|
mApplySyntheticBold = aNeedsBold;
|
|
}
|
|
|
|
gfxFT2Font::~gfxFT2Font()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Look up the font in the gfxFont cache. If we don't find it, create one.
|
|
* In either case, add a ref, append it to the aFonts array, and return it ---
|
|
* except for OOM in which case we do nothing and return null.
|
|
*/
|
|
already_AddRefed<gfxFT2Font>
|
|
gfxFT2Font::GetOrMakeFont(const nsAString& aName, const gfxFontStyle *aStyle,
|
|
bool aNeedsBold)
|
|
{
|
|
#ifdef ANDROID
|
|
FT2FontEntry *fe = static_cast<FT2FontEntry*>
|
|
(gfxPlatformFontList::PlatformFontList()->
|
|
FindFontForFamily(aName, aStyle, aNeedsBold));
|
|
#else
|
|
FT2FontEntry *fe = static_cast<FT2FontEntry*>
|
|
(gfxToolkitPlatform::GetPlatform()->FindFontEntry(aName, *aStyle));
|
|
#endif
|
|
if (!fe) {
|
|
NS_WARNING("Failed to find font entry for font!");
|
|
return nullptr;
|
|
}
|
|
|
|
nsRefPtr<gfxFT2Font> font = GetOrMakeFont(fe, aStyle, aNeedsBold);
|
|
return font.forget();
|
|
}
|
|
|
|
already_AddRefed<gfxFT2Font>
|
|
gfxFT2Font::GetOrMakeFont(FT2FontEntry *aFontEntry, const gfxFontStyle *aStyle,
|
|
bool aNeedsBold)
|
|
{
|
|
nsRefPtr<gfxFont> font = gfxFontCache::GetCache()->Lookup(aFontEntry, aStyle);
|
|
if (!font) {
|
|
cairo_scaled_font_t *scaledFont = aFontEntry->CreateScaledFont(aStyle);
|
|
if (!scaledFont) {
|
|
return nullptr;
|
|
}
|
|
font = new gfxFT2Font(scaledFont, aFontEntry, aStyle, aNeedsBold);
|
|
cairo_scaled_font_destroy(scaledFont);
|
|
if (!font) {
|
|
return nullptr;
|
|
}
|
|
gfxFontCache::GetCache()->AddNew(font);
|
|
}
|
|
return font.forget().downcast<gfxFT2Font>();
|
|
}
|
|
|
|
void
|
|
gfxFT2Font::FillGlyphDataForChar(uint32_t ch, CachedGlyphData *gd)
|
|
{
|
|
gfxFT2LockedFace faceLock(this);
|
|
FT_Face face = faceLock.get();
|
|
|
|
if (!face->charmap || face->charmap->encoding != FT_ENCODING_UNICODE) {
|
|
FT_Select_Charmap(face, FT_ENCODING_UNICODE);
|
|
}
|
|
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_Int32 flags = gfxPlatform::GetPlatform()->FontHintingEnabled() ?
|
|
FT_LOAD_DEFAULT :
|
|
(FT_LOAD_NO_AUTOHINT | FT_LOAD_NO_HINTING);
|
|
FT_Error err = FT_Load_Glyph(face, gid, flags);
|
|
|
|
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;
|
|
}
|
|
|
|
void
|
|
gfxFT2Font::AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
|
|
FontCacheSizes* aSizes) const
|
|
{
|
|
gfxFont::AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
|
|
aSizes->mFontInstances +=
|
|
mCharGlyphCache.SizeOfExcludingThis(nullptr, aMallocSizeOf);
|
|
}
|
|
|
|
void
|
|
gfxFT2Font::AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
|
|
FontCacheSizes* aSizes) const
|
|
{
|
|
aSizes->mFontInstances += aMallocSizeOf(this);
|
|
AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
|
|
}
|
|
|
|
#ifdef USE_SKIA
|
|
mozilla::TemporaryRef<mozilla::gfx::GlyphRenderingOptions>
|
|
gfxFT2Font::GetGlyphRenderingOptions(const TextRunDrawParams* aRunParams)
|
|
{
|
|
mozilla::gfx::FontHinting hinting;
|
|
|
|
if (gfxPlatform::GetPlatform()->FontHintingEnabled()) {
|
|
hinting = mozilla::gfx::FontHinting::NORMAL;
|
|
} else {
|
|
hinting = mozilla::gfx::FontHinting::NONE;
|
|
}
|
|
|
|
// We don't want to force the use of the autohinter over the font's built in hints
|
|
return mozilla::gfx::Factory::CreateCairoGlyphRenderingOptions(hinting, false);
|
|
}
|
|
#endif
|
|
|