/* | |
* 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 <mlang.h> | |
#include <tchar.h> | |
#if PLATFORM(CG) | |
#include <ApplicationServices/ApplicationServices.h> | |
#include <WebKitSystemInterface/WebKitSystemInterface.h> | |
#endif | |
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_platformData.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_avgCharWidth = textMetrics.tmAveCharWidth; | |
m_maxCharWidth = textMetrics.tmMaxCharWidth; | |
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::platformDestroy() | |
{ | |
// We don't hash this on Win32, so it's effectively owned by us. | |
delete m_smallCapsFontData; | |
m_smallCapsFontData = 0; | |
ScriptFreeCache(&m_scriptCache); | |
delete m_scriptFontProperties; | |
} | |
SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const | |
{ | |
if (!m_smallCapsFontData) { | |
float smallCapsHeight = cSmallCapsFontSizeMultiplier * m_platformData.size(); | |
if (isCustomFont()) { | |
FontPlatformData smallCapsFontData(m_platformData); | |
smallCapsFontData.setSize(smallCapsHeight); | |
m_smallCapsFontData = new SimpleFontData(smallCapsFontData, true, false); | |
} else { | |
LOGFONT winfont; | |
GetObject(m_platformData.hfont(), sizeof(LOGFONT), &winfont); | |
winfont.lfHeight = -lroundf(smallCapsHeight * (m_platformData.useGDI() ? 1 : 32)); | |
HFONT hfont = CreateFontIndirect(&winfont); | |
m_smallCapsFontData = new SimpleFontData(FontPlatformData(hfont, smallCapsHeight, m_platformData.syntheticBold(), m_platformData.syntheticOblique(), m_platformData.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_platformData.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_platformData.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); | |
} | |
GlyphMetrics SimpleFontData::metricsForGDIGlyph(Glyph glyph) const | |
{ | |
HDC hdc = GetDC(0); | |
SetGraphicsMode(hdc, GM_ADVANCED); | |
HGDIOBJ oldFont = SelectObject(hdc, m_platformData.hfont()); | |
GLYPHMETRICS gdiMetrics; | |
static const MAT2 identity = { 0, 1, 0, 0, 0, 0, 0, 1 }; | |
GetGlyphOutline(hdc, glyph, GGO_METRICS | GGO_GLYPH_INDEX, &gdiMetrics, 0, 0, &identity); | |
SelectObject(hdc, oldFont); | |
ReleaseDC(0, hdc); | |
GlyphMetrics glyphMetrics; | |
glyphMetrics.horizontalAdvance = gdiMetrics.gmCellIncX + m_syntheticBoldOffset; | |
glyphMetrics.boundingBox = FloatRect(gdiMetrics.gmptGlyphOrigin.x, -gdiMetrics.gmptGlyphOrigin.y, | |
gdiMetrics.gmBlackBoxX + m_syntheticBoldOffset, gdiMetrics.gmBlackBoxY); | |
return glyphMetrics; | |
} | |
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_platformData.hfont()); | |
ScriptGetFontProperties(dc, scriptCache(), m_scriptFontProperties); | |
RestoreDC(dc, -1); | |
ReleaseDC(0, dc); | |
} | |
} | |
return m_scriptFontProperties; | |
} | |
} |