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4b12513f89
It seems like the sizes for these data structures can be controlled from Web content, and we are already prepared to deal with OOM conditions, except that we are using infallible allocations by mistake.
639 lines
27 KiB
C++
639 lines
27 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ArrayUtils.h"
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#include "gfxCoreTextShaper.h"
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#include "gfxMacFont.h"
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#include "gfxFontUtils.h"
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#include "mozilla/gfx/2D.h"
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#include <algorithm>
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using namespace mozilla;
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// standard font descriptors that we construct the first time they're needed
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CTFontDescriptorRef gfxCoreTextShaper::sDefaultFeaturesDescriptor = nullptr;
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CTFontDescriptorRef gfxCoreTextShaper::sDisableLigaturesDescriptor = nullptr;
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gfxCoreTextShaper::gfxCoreTextShaper(gfxMacFont *aFont)
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: gfxFontShaper(aFont)
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{
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// Create our CTFontRef
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mCTFont = ::CTFontCreateWithGraphicsFont(aFont->GetCGFontRef(),
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aFont->GetAdjustedSize(),
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nullptr,
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GetDefaultFeaturesDescriptor());
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// Set up the default attribute dictionary that we will need each time we create a CFAttributedString
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mAttributesDict = ::CFDictionaryCreate(kCFAllocatorDefault,
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(const void**) &kCTFontAttributeName,
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(const void**) &mCTFont,
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1, // count of attributes
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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}
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gfxCoreTextShaper::~gfxCoreTextShaper()
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{
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if (mAttributesDict) {
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::CFRelease(mAttributesDict);
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}
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if (mCTFont) {
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::CFRelease(mCTFont);
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}
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}
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bool
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gfxCoreTextShaper::ShapeText(gfxContext *aContext,
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const char16_t *aText,
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uint32_t aOffset,
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uint32_t aLength,
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int32_t aScript,
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gfxShapedText *aShapedText)
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{
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// Create a CFAttributedString with text and style info, so we can use CoreText to lay it out.
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bool isRightToLeft = aShapedText->IsRightToLeft();
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uint32_t length = aLength;
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// we need to bidi-wrap the text if the run is RTL,
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// or if it is an LTR run but may contain (overridden) RTL chars
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bool bidiWrap = isRightToLeft;
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if (!bidiWrap && !aShapedText->TextIs8Bit()) {
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uint32_t i;
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for (i = 0; i < length; ++i) {
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if (gfxFontUtils::PotentialRTLChar(aText[i])) {
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bidiWrap = true;
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break;
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}
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}
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}
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// If there's a possibility of any bidi, we wrap the text with direction overrides
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// to ensure neutrals or characters that were bidi-overridden in HTML behave properly.
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const UniChar beginLTR[] = { 0x202d, 0x20 };
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const UniChar beginRTL[] = { 0x202e, 0x20 };
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const UniChar endBidiWrap[] = { 0x20, 0x2e, 0x202c };
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uint32_t startOffset;
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CFStringRef stringObj;
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if (bidiWrap) {
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startOffset = isRightToLeft ?
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mozilla::ArrayLength(beginRTL) : mozilla::ArrayLength(beginLTR);
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CFMutableStringRef mutableString =
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::CFStringCreateMutable(kCFAllocatorDefault,
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length + startOffset + mozilla::ArrayLength(endBidiWrap));
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::CFStringAppendCharacters(mutableString,
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isRightToLeft ? beginRTL : beginLTR,
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startOffset);
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::CFStringAppendCharacters(mutableString, reinterpret_cast<const UniChar*>(aText), length);
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::CFStringAppendCharacters(mutableString,
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endBidiWrap, mozilla::ArrayLength(endBidiWrap));
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stringObj = mutableString;
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} else {
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startOffset = 0;
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stringObj = ::CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault,
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reinterpret_cast<const UniChar*>(aText),
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length, kCFAllocatorNull);
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}
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CFDictionaryRef attrObj;
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if (aShapedText->DisableLigatures()) {
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// For letterspacing (or maybe other situations) we need to make a copy of the CTFont
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// with the ligature feature disabled
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CTFontRef ctFont =
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CreateCTFontWithDisabledLigatures(::CTFontGetSize(mCTFont));
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attrObj =
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::CFDictionaryCreate(kCFAllocatorDefault,
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(const void**) &kCTFontAttributeName,
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(const void**) &ctFont,
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1, // count of attributes
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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// Having created the dict, we're finished with our ligature-disabled CTFontRef
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::CFRelease(ctFont);
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} else {
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attrObj = mAttributesDict;
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::CFRetain(attrObj);
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}
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// Now we can create an attributed string
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CFAttributedStringRef attrStringObj =
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::CFAttributedStringCreate(kCFAllocatorDefault, stringObj, attrObj);
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::CFRelease(stringObj);
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::CFRelease(attrObj);
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// Create the CoreText line from our string, then we're done with it
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CTLineRef line = ::CTLineCreateWithAttributedString(attrStringObj);
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::CFRelease(attrStringObj);
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// and finally retrieve the glyph data and store into the gfxTextRun
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CFArrayRef glyphRuns = ::CTLineGetGlyphRuns(line);
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uint32_t numRuns = ::CFArrayGetCount(glyphRuns);
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// Iterate through the glyph runs.
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// Note that this includes the bidi wrapper, so we have to be careful
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// not to include the extra glyphs from there
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bool success = true;
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for (uint32_t runIndex = 0; runIndex < numRuns; runIndex++) {
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CTRunRef aCTRun =
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(CTRunRef)::CFArrayGetValueAtIndex(glyphRuns, runIndex);
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if (SetGlyphsFromRun(aShapedText, aOffset, aLength, aCTRun, startOffset) != NS_OK) {
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success = false;
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break;
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}
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}
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::CFRelease(line);
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return success;
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}
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#define SMALL_GLYPH_RUN 128 // preallocated size of our auto arrays for per-glyph data;
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// some testing indicates that 90%+ of glyph runs will fit
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// without requiring a separate allocation
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nsresult
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gfxCoreTextShaper::SetGlyphsFromRun(gfxShapedText *aShapedText,
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uint32_t aOffset,
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uint32_t aLength,
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CTRunRef aCTRun,
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int32_t aStringOffset)
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{
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// The word has been bidi-wrapped; aStringOffset is the number
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// of chars at the beginning of the CTLine that we should skip.
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// aCTRun is a glyph run from the CoreText layout process.
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int32_t direction = aShapedText->IsRightToLeft() ? -1 : 1;
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int32_t numGlyphs = ::CTRunGetGlyphCount(aCTRun);
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if (numGlyphs == 0) {
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return NS_OK;
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}
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int32_t wordLength = aLength;
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// character offsets get really confusing here, as we have to keep track of
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// (a) the text in the actual textRun we're constructing
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// (c) the string that was handed to CoreText, which contains the text of the font run
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// plus directional-override padding
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// (d) the CTRun currently being processed, which may be a sub-run of the CoreText line
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// (but may extend beyond the actual font run into the bidi wrapping text).
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// aStringOffset tells us how many initial characters of the line to ignore.
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// get the source string range within the CTLine's text
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CFRange stringRange = ::CTRunGetStringRange(aCTRun);
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// skip the run if it is entirely outside the actual range of the font run
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if (stringRange.location - aStringOffset + stringRange.length <= 0 ||
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stringRange.location - aStringOffset >= wordLength) {
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return NS_OK;
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}
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// retrieve the laid-out glyph data from the CTRun
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nsAutoArrayPtr<CGGlyph> glyphsArray;
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nsAutoArrayPtr<CGPoint> positionsArray;
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nsAutoArrayPtr<CFIndex> glyphToCharArray;
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const CGGlyph* glyphs = nullptr;
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const CGPoint* positions = nullptr;
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const CFIndex* glyphToChar = nullptr;
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// Testing indicates that CTRunGetGlyphsPtr (almost?) always succeeds,
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// and so allocating a new array and copying data with CTRunGetGlyphs
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// will be extremely rare.
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// If this were not the case, we could use an nsAutoTArray<> to
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// try and avoid the heap allocation for small runs.
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// It's possible that some future change to CoreText will mean that
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// CTRunGetGlyphsPtr fails more often; if this happens, nsAutoTArray<>
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// may become an attractive option.
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glyphs = ::CTRunGetGlyphsPtr(aCTRun);
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if (!glyphs) {
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glyphsArray = new (std::nothrow) CGGlyph[numGlyphs];
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if (!glyphsArray) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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::CTRunGetGlyphs(aCTRun, ::CFRangeMake(0, 0), glyphsArray.get());
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glyphs = glyphsArray.get();
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}
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positions = ::CTRunGetPositionsPtr(aCTRun);
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if (!positions) {
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positionsArray = new (std::nothrow) CGPoint[numGlyphs];
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if (!positionsArray) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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::CTRunGetPositions(aCTRun, ::CFRangeMake(0, 0), positionsArray.get());
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positions = positionsArray.get();
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}
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// Remember that the glyphToChar indices relate to the CoreText line,
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// not to the beginning of the textRun, the font run,
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// or the stringRange of the glyph run
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glyphToChar = ::CTRunGetStringIndicesPtr(aCTRun);
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if (!glyphToChar) {
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glyphToCharArray = new (std::nothrow) CFIndex[numGlyphs];
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if (!glyphToCharArray) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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::CTRunGetStringIndices(aCTRun, ::CFRangeMake(0, 0), glyphToCharArray.get());
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glyphToChar = glyphToCharArray.get();
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}
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double runWidth = ::CTRunGetTypographicBounds(aCTRun, ::CFRangeMake(0, 0),
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nullptr, nullptr, nullptr);
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nsAutoTArray<gfxShapedText::DetailedGlyph,1> detailedGlyphs;
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gfxShapedText::CompressedGlyph g;
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gfxShapedText::CompressedGlyph *charGlyphs =
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aShapedText->GetCharacterGlyphs() + aOffset;
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// CoreText gives us the glyphindex-to-charindex mapping, which relates each glyph
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// to a source text character; we also need the charindex-to-glyphindex mapping to
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// find the glyph for a given char. Note that some chars may not map to any glyph
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// (ligature continuations), and some may map to several glyphs (eg Indic split vowels).
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// We set the glyph index to NO_GLYPH for chars that have no associated glyph, and we
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// record the last glyph index for cases where the char maps to several glyphs,
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// so that our clumping will include all the glyph fragments for the character.
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// The charToGlyph array is indexed by char position within the stringRange of the glyph run.
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static const int32_t NO_GLYPH = -1;
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AutoFallibleTArray<int32_t,SMALL_GLYPH_RUN> charToGlyphArray;
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if (!charToGlyphArray.SetLength(stringRange.length)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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int32_t *charToGlyph = charToGlyphArray.Elements();
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for (int32_t offset = 0; offset < stringRange.length; ++offset) {
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charToGlyph[offset] = NO_GLYPH;
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}
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for (int32_t i = 0; i < numGlyphs; ++i) {
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int32_t loc = glyphToChar[i] - stringRange.location;
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if (loc >= 0 && loc < stringRange.length) {
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charToGlyph[loc] = i;
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}
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}
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// Find character and glyph clumps that correspond, allowing for ligatures,
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// indic reordering, split glyphs, etc.
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//
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// The idea is that we'll find a character sequence starting at the first char of stringRange,
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// and extend it until it includes the character associated with the first glyph;
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// we also extend it as long as there are "holes" in the range of glyphs. So we
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// will eventually have a contiguous sequence of characters, starting at the beginning
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// of the range, that map to a contiguous sequence of glyphs, starting at the beginning
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// of the glyph array. That's a clump; then we update the starting positions and repeat.
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//
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// NB: In the case of RTL layouts, we iterate over the stringRange in reverse.
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//
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// This may find characters that fall outside the range 0:wordLength,
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// so we won't necessarily use everything we find here.
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bool isRightToLeft = aShapedText->IsRightToLeft();
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int32_t glyphStart = 0; // looking for a clump that starts at this glyph index
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int32_t charStart = isRightToLeft ?
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stringRange.length - 1 : 0; // and this char index (in the stringRange of the glyph run)
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while (glyphStart < numGlyphs) { // keep finding groups until all glyphs are accounted for
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bool inOrder = true;
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int32_t charEnd = glyphToChar[glyphStart] - stringRange.location;
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NS_WARN_IF_FALSE(charEnd >= 0 && charEnd < stringRange.length,
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"glyph-to-char mapping points outside string range");
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// clamp charEnd to the valid range of the string
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charEnd = std::max(charEnd, 0);
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charEnd = std::min(charEnd, int32_t(stringRange.length));
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int32_t glyphEnd = glyphStart;
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int32_t charLimit = isRightToLeft ? -1 : stringRange.length;
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do {
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// This is normally executed once for each iteration of the outer loop,
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// but in unusual cases where the character/glyph association is complex,
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// the initial character range might correspond to a non-contiguous
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// glyph range with "holes" in it. If so, we will repeat this loop to
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// extend the character range until we have a contiguous glyph sequence.
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NS_ASSERTION((direction > 0 && charEnd < charLimit) ||
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(direction < 0 && charEnd > charLimit),
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"no characters left in range?");
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charEnd += direction;
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while (charEnd != charLimit && charToGlyph[charEnd] == NO_GLYPH) {
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charEnd += direction;
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}
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// find the maximum glyph index covered by the clump so far
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if (isRightToLeft) {
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for (int32_t i = charStart; i > charEnd; --i) {
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if (charToGlyph[i] != NO_GLYPH) {
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// update extent of glyph range
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glyphEnd = std::max(glyphEnd, charToGlyph[i] + 1);
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}
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}
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} else {
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for (int32_t i = charStart; i < charEnd; ++i) {
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if (charToGlyph[i] != NO_GLYPH) {
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// update extent of glyph range
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glyphEnd = std::max(glyphEnd, charToGlyph[i] + 1);
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}
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}
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}
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if (glyphEnd == glyphStart + 1) {
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// for the common case of a single-glyph clump, we can skip the following checks
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break;
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}
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if (glyphEnd == glyphStart) {
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// no glyphs, try to extend the clump
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continue;
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}
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// check whether all glyphs in the range are associated with the characters
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// in our clump; if not, we have a discontinuous range, and should extend it
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// unless we've reached the end of the text
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bool allGlyphsAreWithinCluster = true;
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int32_t prevGlyphCharIndex = charStart;
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for (int32_t i = glyphStart; i < glyphEnd; ++i) {
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int32_t glyphCharIndex = glyphToChar[i] - stringRange.location;
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if (isRightToLeft) {
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if (glyphCharIndex > charStart || glyphCharIndex <= charEnd) {
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allGlyphsAreWithinCluster = false;
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break;
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}
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if (glyphCharIndex > prevGlyphCharIndex) {
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inOrder = false;
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}
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prevGlyphCharIndex = glyphCharIndex;
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} else {
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if (glyphCharIndex < charStart || glyphCharIndex >= charEnd) {
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allGlyphsAreWithinCluster = false;
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break;
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}
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if (glyphCharIndex < prevGlyphCharIndex) {
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inOrder = false;
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}
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prevGlyphCharIndex = glyphCharIndex;
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}
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}
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if (allGlyphsAreWithinCluster) {
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break;
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}
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} while (charEnd != charLimit);
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NS_WARN_IF_FALSE(glyphStart < glyphEnd,
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"character/glyph clump contains no glyphs!");
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if (glyphStart == glyphEnd) {
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++glyphStart; // make progress - avoid potential infinite loop
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charStart = charEnd;
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continue;
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}
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NS_WARN_IF_FALSE(charStart != charEnd,
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"character/glyph clump contains no characters!");
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if (charStart == charEnd) {
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glyphStart = glyphEnd; // this is bad - we'll discard the glyph(s),
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// as there's nowhere to attach them
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continue;
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}
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// Now charStart..charEnd is a ligature clump, corresponding to glyphStart..glyphEnd;
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// Set baseCharIndex to the char we'll actually attach the glyphs to (1st of ligature),
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// and endCharIndex to the limit (position beyond the last char),
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// adjusting for the offset of the stringRange relative to the textRun.
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int32_t baseCharIndex, endCharIndex;
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if (isRightToLeft) {
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while (charEnd >= 0 && charToGlyph[charEnd] == NO_GLYPH) {
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charEnd--;
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}
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baseCharIndex = charEnd + stringRange.location - aStringOffset + 1;
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endCharIndex = charStart + stringRange.location - aStringOffset + 1;
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} else {
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while (charEnd < stringRange.length && charToGlyph[charEnd] == NO_GLYPH) {
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charEnd++;
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}
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baseCharIndex = charStart + stringRange.location - aStringOffset;
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endCharIndex = charEnd + stringRange.location - aStringOffset;
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}
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// Then we check if the clump falls outside our actual string range; if so, just go to the next.
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if (endCharIndex <= 0 || baseCharIndex >= wordLength) {
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glyphStart = glyphEnd;
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charStart = charEnd;
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continue;
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}
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// Ensure we won't try to go beyond the valid length of the word's text
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baseCharIndex = std::max(baseCharIndex, 0);
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endCharIndex = std::min(endCharIndex, wordLength);
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// Now we're ready to set the glyph info in the textRun; measure the glyph width
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// of the first (perhaps only) glyph, to see if it is "Simple"
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int32_t appUnitsPerDevUnit = aShapedText->GetAppUnitsPerDevUnit();
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double toNextGlyph;
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if (glyphStart < numGlyphs-1) {
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toNextGlyph = positions[glyphStart+1].x - positions[glyphStart].x;
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} else {
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toNextGlyph = positions[0].x + runWidth - positions[glyphStart].x;
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}
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int32_t advance = int32_t(toNextGlyph * appUnitsPerDevUnit);
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// Check if it's a simple one-to-one mapping
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int32_t glyphsInClump = glyphEnd - glyphStart;
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if (glyphsInClump == 1 &&
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gfxTextRun::CompressedGlyph::IsSimpleGlyphID(glyphs[glyphStart]) &&
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gfxTextRun::CompressedGlyph::IsSimpleAdvance(advance) &&
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charGlyphs[baseCharIndex].IsClusterStart() &&
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positions[glyphStart].y == 0.0)
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{
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charGlyphs[baseCharIndex].SetSimpleGlyph(advance,
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glyphs[glyphStart]);
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} else {
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// collect all glyphs in a list to be assigned to the first char;
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// there must be at least one in the clump, and we already measured its advance,
|
|
// hence the placement of the loop-exit test and the measurement of the next glyph
|
|
while (1) {
|
|
gfxTextRun::DetailedGlyph *details = detailedGlyphs.AppendElement();
|
|
details->mGlyphID = glyphs[glyphStart];
|
|
details->mXOffset = 0;
|
|
details->mYOffset = -positions[glyphStart].y * appUnitsPerDevUnit;
|
|
details->mAdvance = advance;
|
|
if (++glyphStart >= glyphEnd) {
|
|
break;
|
|
}
|
|
if (glyphStart < numGlyphs-1) {
|
|
toNextGlyph = positions[glyphStart+1].x - positions[glyphStart].x;
|
|
} else {
|
|
toNextGlyph = positions[0].x + runWidth - positions[glyphStart].x;
|
|
}
|
|
advance = int32_t(toNextGlyph * appUnitsPerDevUnit);
|
|
}
|
|
|
|
gfxTextRun::CompressedGlyph g;
|
|
g.SetComplex(charGlyphs[baseCharIndex].IsClusterStart(),
|
|
true, detailedGlyphs.Length());
|
|
aShapedText->SetGlyphs(aOffset + baseCharIndex, g, detailedGlyphs.Elements());
|
|
|
|
detailedGlyphs.Clear();
|
|
}
|
|
|
|
// the rest of the chars in the group are ligature continuations, no associated glyphs
|
|
while (++baseCharIndex != endCharIndex && baseCharIndex < wordLength) {
|
|
gfxShapedText::CompressedGlyph &g = charGlyphs[baseCharIndex];
|
|
NS_ASSERTION(!g.IsSimpleGlyph(), "overwriting a simple glyph");
|
|
g.SetComplex(inOrder && g.IsClusterStart(), false, 0);
|
|
}
|
|
|
|
glyphStart = glyphEnd;
|
|
charStart = charEnd;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
#undef SMALL_GLYPH_RUN
|
|
|
|
// Construct the font attribute descriptor that we'll apply by default when creating a CTFontRef.
|
|
// This will turn off line-edge swashes by default, because we don't know the actual line breaks
|
|
// when doing glyph shaping.
|
|
void
|
|
gfxCoreTextShaper::CreateDefaultFeaturesDescriptor()
|
|
{
|
|
if (sDefaultFeaturesDescriptor != nullptr) {
|
|
return;
|
|
}
|
|
|
|
SInt16 val = kSmartSwashType;
|
|
CFNumberRef swashesType =
|
|
::CFNumberCreate(kCFAllocatorDefault,
|
|
kCFNumberSInt16Type,
|
|
&val);
|
|
val = kLineInitialSwashesOffSelector;
|
|
CFNumberRef lineInitialsOffSelector =
|
|
::CFNumberCreate(kCFAllocatorDefault,
|
|
kCFNumberSInt16Type,
|
|
&val);
|
|
|
|
CFTypeRef keys[] = { kCTFontFeatureTypeIdentifierKey,
|
|
kCTFontFeatureSelectorIdentifierKey };
|
|
CFTypeRef values[] = { swashesType,
|
|
lineInitialsOffSelector };
|
|
CFDictionaryRef featureSettings[2];
|
|
featureSettings[0] =
|
|
::CFDictionaryCreate(kCFAllocatorDefault,
|
|
(const void **) keys,
|
|
(const void **) values,
|
|
ArrayLength(keys),
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
::CFRelease(lineInitialsOffSelector);
|
|
|
|
val = kLineFinalSwashesOffSelector;
|
|
CFNumberRef lineFinalsOffSelector =
|
|
::CFNumberCreate(kCFAllocatorDefault,
|
|
kCFNumberSInt16Type,
|
|
&val);
|
|
values[1] = lineFinalsOffSelector;
|
|
featureSettings[1] =
|
|
::CFDictionaryCreate(kCFAllocatorDefault,
|
|
(const void **) keys,
|
|
(const void **) values,
|
|
ArrayLength(keys),
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
::CFRelease(lineFinalsOffSelector);
|
|
::CFRelease(swashesType);
|
|
|
|
CFArrayRef featuresArray =
|
|
::CFArrayCreate(kCFAllocatorDefault,
|
|
(const void **) featureSettings,
|
|
ArrayLength(featureSettings),
|
|
&kCFTypeArrayCallBacks);
|
|
::CFRelease(featureSettings[0]);
|
|
::CFRelease(featureSettings[1]);
|
|
|
|
const CFTypeRef attrKeys[] = { kCTFontFeatureSettingsAttribute };
|
|
const CFTypeRef attrValues[] = { featuresArray };
|
|
CFDictionaryRef attributesDict =
|
|
::CFDictionaryCreate(kCFAllocatorDefault,
|
|
(const void **) attrKeys,
|
|
(const void **) attrValues,
|
|
ArrayLength(attrKeys),
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
::CFRelease(featuresArray);
|
|
|
|
sDefaultFeaturesDescriptor =
|
|
::CTFontDescriptorCreateWithAttributes(attributesDict);
|
|
::CFRelease(attributesDict);
|
|
}
|
|
|
|
// Create a CTFontRef, with the Common Ligatures feature disabled
|
|
CTFontRef
|
|
gfxCoreTextShaper::CreateCTFontWithDisabledLigatures(CGFloat aSize)
|
|
{
|
|
if (sDisableLigaturesDescriptor == nullptr) {
|
|
// initialize cached descriptor to turn off the Common Ligatures feature
|
|
SInt16 val = kLigaturesType;
|
|
CFNumberRef ligaturesType =
|
|
::CFNumberCreate(kCFAllocatorDefault,
|
|
kCFNumberSInt16Type,
|
|
&val);
|
|
val = kCommonLigaturesOffSelector;
|
|
CFNumberRef commonLigaturesOffSelector =
|
|
::CFNumberCreate(kCFAllocatorDefault,
|
|
kCFNumberSInt16Type,
|
|
&val);
|
|
|
|
const CFTypeRef keys[] = { kCTFontFeatureTypeIdentifierKey,
|
|
kCTFontFeatureSelectorIdentifierKey };
|
|
const CFTypeRef values[] = { ligaturesType,
|
|
commonLigaturesOffSelector };
|
|
CFDictionaryRef featureSettingDict =
|
|
::CFDictionaryCreate(kCFAllocatorDefault,
|
|
(const void **) keys,
|
|
(const void **) values,
|
|
ArrayLength(keys),
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
::CFRelease(ligaturesType);
|
|
::CFRelease(commonLigaturesOffSelector);
|
|
|
|
CFArrayRef featuresArray =
|
|
::CFArrayCreate(kCFAllocatorDefault,
|
|
(const void **) &featureSettingDict,
|
|
1,
|
|
&kCFTypeArrayCallBacks);
|
|
::CFRelease(featureSettingDict);
|
|
|
|
CFDictionaryRef attributesDict =
|
|
::CFDictionaryCreate(kCFAllocatorDefault,
|
|
(const void **) &kCTFontFeatureSettingsAttribute,
|
|
(const void **) &featuresArray,
|
|
1, // count of keys & values
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
::CFRelease(featuresArray);
|
|
|
|
sDisableLigaturesDescriptor =
|
|
::CTFontDescriptorCreateCopyWithAttributes(GetDefaultFeaturesDescriptor(),
|
|
attributesDict);
|
|
::CFRelease(attributesDict);
|
|
}
|
|
|
|
gfxMacFont *f = static_cast<gfxMacFont*>(mFont);
|
|
return ::CTFontCreateWithGraphicsFont(f->GetCGFontRef(), aSize, nullptr,
|
|
sDisableLigaturesDescriptor);
|
|
}
|
|
|
|
void
|
|
gfxCoreTextShaper::Shutdown() // [static]
|
|
{
|
|
if (sDisableLigaturesDescriptor != nullptr) {
|
|
::CFRelease(sDisableLigaturesDescriptor);
|
|
sDisableLigaturesDescriptor = nullptr;
|
|
}
|
|
if (sDefaultFeaturesDescriptor != nullptr) {
|
|
::CFRelease(sDefaultFeaturesDescriptor);
|
|
sDefaultFeaturesDescriptor = nullptr;
|
|
}
|
|
}
|