| /* |
| * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. |
| * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com |
| * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "GlyphPage.h" |
| |
| #include "CairoUtilities.h" |
| #include "CharacterProperties.h" |
| #include "Font.h" |
| #include "FontCascade.h" |
| #include "UTF16UChar32Iterator.h" |
| #include <cairo-ft.h> |
| #include <cairo.h> |
| #include <fontconfig/fcfreetype.h> |
| #include <wtf/Optional.h> |
| |
| namespace WebCore { |
| |
| bool GlyphPage::fill(UChar* buffer, unsigned bufferLength) |
| { |
| const Font& font = this->font(); |
| cairo_scaled_font_t* scaledFont = font.platformData().scaledFont(); |
| ASSERT(scaledFont); |
| |
| CairoFtFaceLocker cairoFtFaceLocker(scaledFont); |
| FT_Face face = cairoFtFaceLocker.ftFace(); |
| if (!face) |
| return false; |
| |
| WTF::Optional<Glyph> zeroWidthSpaceGlyphValue; |
| auto zeroWidthSpaceGlyph = |
| [&] { |
| if (!zeroWidthSpaceGlyphValue) |
| zeroWidthSpaceGlyphValue = FcFreeTypeCharIndex(face, zeroWidthSpace); |
| return *zeroWidthSpaceGlyphValue; |
| }; |
| |
| bool haveGlyphs = false; |
| UTF16UChar32Iterator iterator(buffer, bufferLength); |
| for (unsigned i = 0; i < GlyphPage::size; i++) { |
| UChar32 character = iterator.next(); |
| if (character == iterator.end()) |
| break; |
| |
| Glyph glyph = FcFreeTypeCharIndex(face, FontCascade::treatAsSpace(character) ? space : character); |
| // If the font doesn't support a Default_Ignorable character, replace it with zero with space. |
| if (!glyph && (isDefaultIgnorableCodePoint(character) || isControlCharacter(character))) |
| glyph = zeroWidthSpaceGlyph(); |
| |
| if (!glyph) |
| setGlyphForIndex(i, 0); |
| else { |
| setGlyphForIndex(i, glyph); |
| haveGlyphs = true; |
| } |
| } |
| |
| return haveGlyphs; |
| } |
| |
| } |