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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;
}
}
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