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+/*
+ * Copyright (C) 2006, 2007, 2008 Apple 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:
+ *
+ * 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 Computer, 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 "SimpleFontData.h"
+
+#include <winsock2.h>
+#include "Font.h"
+#include "FontCache.h"
+#include "FloatRect.h"
+#include "FontDescription.h"
+#include <wtf/MathExtras.h>
+#include <unicode/uchar.h>
+#include <unicode/unorm.h>
+#include <ApplicationServices/ApplicationServices.h>
+#include <mlang.h>
+#include <tchar.h>
+#include <WebKitSystemInterface/WebKitSystemInterface.h>
+
+namespace WebCore {
+
+using std::max;
+
+const float cSmallCapsFontSizeMultiplier = 0.7f;
+
+static bool g_shouldApplyMacAscentHack;
+
+void SimpleFontData::setShouldApplyMacAscentHack(bool b)
+{
+ g_shouldApplyMacAscentHack = b;
+}
+
+bool SimpleFontData::shouldApplyMacAscentHack()
+{
+ return g_shouldApplyMacAscentHack;
+}
+
+void SimpleFontData::initGDIFont()
+{
+ HDC hdc = GetDC(0);
+ HGDIOBJ oldFont = SelectObject(hdc, m_font.hfont());
+ OUTLINETEXTMETRIC metrics;
+ GetOutlineTextMetrics(hdc, sizeof(metrics), &metrics);
+ TEXTMETRIC& textMetrics = metrics.otmTextMetrics;
+ m_ascent = textMetrics.tmAscent;
+ m_descent = textMetrics.tmDescent;
+ m_lineGap = textMetrics.tmExternalLeading;
+ m_lineSpacing = m_ascent + m_descent + m_lineGap;
+ m_xHeight = m_ascent * 0.56f; // Best guess for xHeight if no x glyph is present.
+
+ GLYPHMETRICS gm;
+ MAT2 mat = { 1, 0, 0, 1 };
+ DWORD len = GetGlyphOutline(hdc, 'x', GGO_METRICS, &gm, 0, 0, &mat);
+ if (len != GDI_ERROR && gm.gmptGlyphOrigin.y > 0)
+ m_xHeight = gm.gmptGlyphOrigin.y;
+
+ m_unitsPerEm = metrics.otmEMSquare;
+
+ SelectObject(hdc, oldFont);
+ ReleaseDC(0, hdc);
+
+ return;
+}
+
+void SimpleFontData::platformCommonDestroy()
+{
+ // We don't hash this on Win32, so it's effectively owned by us.
+ delete m_smallCapsFontData;
+
+ ScriptFreeCache(&m_scriptCache);
+ delete m_scriptFontProperties;
+}
+
+SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const
+{
+ if (!m_smallCapsFontData) {
+ float smallCapsHeight = cSmallCapsFontSizeMultiplier * m_font.size();
+ if (isCustomFont()) {
+ FontPlatformData smallCapsFontData(m_font);
+ smallCapsFontData.setSize(smallCapsHeight);
+ m_smallCapsFontData = new SimpleFontData(smallCapsFontData, true, false);
+ } else {
+ LOGFONT winfont;
+ GetObject(m_font.hfont(), sizeof(LOGFONT), &winfont);
+ winfont.lfHeight = -lroundf(smallCapsHeight * (m_font.useGDI() ? 1 : 32));
+ HFONT hfont = CreateFontIndirect(&winfont);
+ m_smallCapsFontData = new SimpleFontData(FontPlatformData(hfont, smallCapsHeight, m_font.syntheticBold(), m_font.syntheticOblique(), m_font.useGDI()));
+ }
+ }
+ return m_smallCapsFontData;
+}
+
+bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
+{
+ // FIXME: Support custom fonts.
+ if (isCustomFont())
+ return false;
+
+ // FIXME: Microsoft documentation seems to imply that characters can be output using a given font and DC
+ // merely by testing code page intersection. This seems suspect though. Can't a font only partially
+ // cover a given code page?
+ IMLangFontLink2* langFontLink = FontCache::getFontLinkInterface();
+ if (!langFontLink)
+ return false;
+
+ HDC dc = GetDC(0);
+
+ DWORD acpCodePages;
+ langFontLink->CodePageToCodePages(CP_ACP, &acpCodePages);
+
+ DWORD fontCodePages;
+ langFontLink->GetFontCodePages(dc, m_font.hfont(), &fontCodePages);
+
+ DWORD actualCodePages;
+ long numCharactersProcessed;
+ long offset = 0;
+ while (offset < length) {
+ langFontLink->GetStrCodePages(characters, length, acpCodePages, &actualCodePages, &numCharactersProcessed);
+ if ((actualCodePages & fontCodePages) == 0)
+ return false;
+ offset += numCharactersProcessed;
+ }
+
+ ReleaseDC(0, dc);
+
+ return true;
+}
+
+void SimpleFontData::determinePitch()
+{
+ if (isCustomFont()) {
+ m_treatAsFixedPitch = false;
+ return;
+ }
+
+ // TEXTMETRICS have this. Set m_treatAsFixedPitch based off that.
+ HDC dc = GetDC(0);
+ SaveDC(dc);
+ SelectObject(dc, m_font.hfont());
+
+ // Yes, this looks backwards, but the fixed pitch bit is actually set if the font
+ // is *not* fixed pitch. Unbelievable but true.
+ TEXTMETRIC tm;
+ GetTextMetrics(dc, &tm);
+ m_treatAsFixedPitch = ((tm.tmPitchAndFamily & TMPF_FIXED_PITCH) == 0);
+
+ RestoreDC(dc, -1);
+ ReleaseDC(0, dc);
+}
+
+float SimpleFontData::widthForGDIGlyph(Glyph glyph) const
+{
+ HDC hdc = GetDC(0);
+ HGDIOBJ oldFont = SelectObject(hdc, m_font.hfont());
+ int width;
+ GetCharWidthI(hdc, glyph, 1, 0, &width);
+ SelectObject(hdc, oldFont);
+ ReleaseDC(0, hdc);
+ return width + m_syntheticBoldOffset;
+}
+
+SCRIPT_FONTPROPERTIES* SimpleFontData::scriptFontProperties() const
+{
+ if (!m_scriptFontProperties) {
+ m_scriptFontProperties = new SCRIPT_FONTPROPERTIES;
+ memset(m_scriptFontProperties, 0, sizeof(SCRIPT_FONTPROPERTIES));
+ m_scriptFontProperties->cBytes = sizeof(SCRIPT_FONTPROPERTIES);
+ HRESULT result = ScriptGetFontProperties(0, scriptCache(), m_scriptFontProperties);
+ if (result == E_PENDING) {
+ HDC dc = GetDC(0);
+ SaveDC(dc);
+ SelectObject(dc, m_font.hfont());
+ ScriptGetFontProperties(dc, scriptCache(), m_scriptFontProperties);
+ RestoreDC(dc, -1);
+ ReleaseDC(0, dc);
+ }
+ }
+ return m_scriptFontProperties;
+}
+
+}