bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData) { if (SkUTF16_IsHighSurrogate(buffer[bufferLength-1])) { SkDebugf("%s last char is high-surrogate", __FUNCTION__); return false; } SkPaint paint; fontData->platformData().setupPaint(&paint); paint.setTextEncoding(SkPaint::kUTF16_TextEncoding); SkAutoSTMalloc <GlyphPage::size, uint16_t> glyphStorage(length); uint16_t* glyphs = glyphStorage.get(); // textToGlyphs takes a byte count, not a glyph count so we multiply by two. unsigned count = paint.textToGlyphs(buffer, bufferLength * 2, glyphs); if (count != length) { SkDebugf("%s count != length\n", __FUNCTION__); return false; } if (fontData->hasVerticalGlyphs()) { bool lookVariants = false; for (unsigned i = 0; i < bufferLength; ++i) { if (!Font::isCJKIdeograph(buffer[i])) { lookVariants = true; continue; } } if (lookVariants) substituteWithVerticalGlyphs(fontData, glyphs, bufferLength); } unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero for (unsigned i = 0; i < length; i++) { setGlyphDataForIndex(offset + i, glyphs[i], glyphs[i] ? fontData : NULL); allGlyphs |= glyphs[i]; } return allGlyphs != 0; }
bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData) { if (SkUTF16_IsHighSurrogate(buffer[bufferLength-1])) { SkDebugf("%s last char is high-surrogate", __FUNCTION__); return false; } SkPaint paint; fontData->platformData().setupPaint(&paint); paint.setTextEncoding(SkPaint::kUTF16_TextEncoding); SkAutoSTMalloc <GlyphPage::size, uint16_t> glyphStorage(length); uint16_t* glyphs = glyphStorage.get(); UChar *textBuffer = buffer; UChar vTextBuffer[bufferLength]; if (fontData->platformData().orientation() == Vertical && !fontData->hasVerticalGlyphs()) { // Convert to vertical form if there is no vertical glyphs. for (unsigned i = 0; i < bufferLength; ++i) { vTextBuffer[i] = VerticalTextMap::getVerticalForm(buffer[i]); if (!vTextBuffer[i]) vTextBuffer[i] = buffer[i]; } textBuffer = vTextBuffer; } unsigned count = paint.textToGlyphs(textBuffer, bufferLength << 1, glyphs); if (count != length) { SkDebugf("%s count != length\n", __FUNCTION__); return false; } if (fontData->hasVerticalGlyphs()) { bool lookVariants = false; for (unsigned i = 0; i < bufferLength; ++i) { if (!Font::isCJKIdeograph(textBuffer[i])) { lookVariants = true; continue; } } if (lookVariants) substituteWithVerticalGlyphs(fontData->platformData(), glyphs, bufferLength); } unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero // search for emoji. If we knew for sure that buffer was a contiguous range // of chars, we could quick-reject the range to avoid this loop (usually) if (EmojiFont::IsAvailable()) { const UChar* curr = textBuffer; for (unsigned i = 0; i < length; i++) { SkUnichar uni = SkUTF16_NextUnichar(&curr); uint16_t glyphID = glyphs[i]; // only sniff if the normal font failed to recognize it if (!glyphID) glyphID = EmojiFont::UnicharToGlyph(uni); setGlyphDataForIndex(offset + i, glyphID, fontData); allGlyphs |= glyphID; } } else { for (unsigned i = 0; i < length; i++) { uint16_t glyphID = glyphs[i]; setGlyphDataForIndex(offset + i, glyphID, fontData); allGlyphs |= glyphID; } } return allGlyphs != 0; }