| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
| * OWNER OR 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 "core/platform/graphics/FontCustomPlatformData.h" |
| |
| #include "core/platform/LayoutTestSupport.h" |
| #include "core/platform/NotImplemented.h" |
| #include "core/platform/SharedBuffer.h" |
| #include "core/platform/graphics/FontPlatformData.h" |
| #include "core/platform/graphics/opentype/OpenTypeSanitizer.h" |
| #include "core/platform/graphics/opentype/OpenTypeUtilities.h" |
| #include "wtf/PassOwnPtr.h" |
| #include "wtf/RefPtr.h" |
| #include "wtf/text/Base64.h" |
| |
| #include <objbase.h> |
| |
| namespace { |
| |
| // Creates a unique and unpredictable font name, in order to avoid collisions and to |
| // not allow access from CSS. |
| String createUniqueFontName() |
| { |
| GUID fontUuid; |
| CoCreateGuid(&fontUuid); |
| |
| String fontName = base64Encode(reinterpret_cast<char*>(&fontUuid), sizeof(fontUuid)); |
| ASSERT(fontName.length() < LF_FACESIZE); |
| return fontName; |
| } |
| |
| } // namespace |
| |
| namespace WebCore { |
| |
| FontCustomPlatformData::FontCustomPlatformData(HANDLE fontReference, const String& name) |
| : m_fontReference(fontReference) |
| , m_name(name) |
| { |
| } |
| |
| FontCustomPlatformData::~FontCustomPlatformData() |
| { |
| if (m_fontReference) |
| RemoveFontMemResourceEx(m_fontReference); |
| } |
| |
| FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation orientation, FontWidthVariant) |
| { |
| ASSERT(m_fontReference); |
| |
| LOGFONT logFont; |
| // m_name comes from createUniqueFontName, which, in turn, gets |
| // it from base64-encoded uuid (128-bit). So, m_name |
| // can never be longer than LF_FACESIZE (32). |
| if (m_name.length() + 1 >= LF_FACESIZE) { |
| ASSERT_NOT_REACHED(); |
| return FontPlatformData(); |
| } |
| unsigned len = m_name.copyTo(logFont.lfFaceName, 0, LF_FACESIZE - 1); |
| logFont.lfFaceName[len] = '\0'; |
| |
| // FIXME: almost identical to FillLogFont in FontCacheWin.cpp. |
| // Need to refactor. |
| logFont.lfHeight = -size; |
| logFont.lfWidth = 0; |
| logFont.lfEscapement = 0; |
| logFont.lfOrientation = 0; |
| logFont.lfUnderline = false; |
| logFont.lfStrikeOut = false; |
| logFont.lfCharSet = DEFAULT_CHARSET; |
| logFont.lfOutPrecision = OUT_TT_ONLY_PRECIS; |
| logFont.lfQuality = isRunningLayoutTest() ? NONANTIALIASED_QUALITY : DEFAULT_QUALITY; // Honor user's desktop settings. |
| logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE; |
| logFont.lfItalic = italic; |
| logFont.lfWeight = bold ? FW_BOLD : FW_DONTCARE; |
| |
| HFONT hfont = CreateFontIndirect(&logFont); |
| return FontPlatformData(hfont, size, orientation); |
| } |
| |
| PassOwnPtr<FontCustomPlatformData> FontCustomPlatformData::create(SharedBuffer* buffer) |
| { |
| ASSERT_ARG(buffer, buffer); |
| |
| OpenTypeSanitizer sanitizer(buffer); |
| RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize(); |
| if (!transcodeBuffer) |
| return nullptr; // validation failed. |
| buffer = transcodeBuffer.get(); |
| |
| // Introduce the font to GDI. AddFontMemResourceEx should be used with care, because it will pollute the process's |
| // font namespace (Windows has no API for creating an HFONT from data without exposing the font to the |
| // entire process first). |
| String fontName = createUniqueFontName(); |
| HANDLE fontReference = renameAndActivateFont(buffer, fontName); |
| if (!fontReference) |
| return nullptr; |
| |
| return adoptPtr(new FontCustomPlatformData(fontReference, fontName)); |
| } |
| |
| bool FontCustomPlatformData::supportsFormat(const String& format) |
| { |
| return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format); |
| } |
| |
| } // namespace WebCore |