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/*
* Copyright (C) 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 <windows.h>
#include "Font.h"
#include "FontCache.h"
#include "FontDescription.h"
#include "MathExtras.h"
#include <cairo.h>
#include <cairo-win32.h>
#include <mlang.h>
#include <tchar.h>
namespace WebCore {
void SimpleFontData::platformInit()
{
m_scriptCache = 0;
m_scriptFontProperties = 0;
m_isSystemFont = false;
m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
if (m_platformData.useGDI())
return initGDIFont();
HDC hdc = GetDC(0);
SaveDC(hdc);
cairo_scaled_font_t* scaledFont = m_platformData.scaledFont();
const double metricsMultiplier = cairo_win32_scaled_font_get_metrics_factor(scaledFont) * m_platformData.size();
cairo_win32_scaled_font_select_font(scaledFont, hdc);
TEXTMETRIC textMetrics;
GetTextMetrics(hdc, &textMetrics);
m_ascent = lroundf(textMetrics.tmAscent * metricsMultiplier);
m_descent = lroundf(textMetrics.tmDescent * metricsMultiplier);
m_xHeight = m_ascent * 0.56f; // Best guess for xHeight for non-Truetype fonts.
m_lineGap = lroundf(textMetrics.tmExternalLeading * metricsMultiplier);
m_lineSpacing = m_ascent + m_descent + m_lineGap;
m_avgCharWidth = lroundf(textMetrics.tmAveCharWidth * metricsMultiplier);
m_maxCharWidth = lroundf(textMetrics.tmMaxCharWidth * metricsMultiplier);
OUTLINETEXTMETRIC metrics;
if (GetOutlineTextMetrics(hdc, sizeof(metrics), &metrics) > 0) {
// This is a TrueType font. We might be able to get an accurate xHeight
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 * metricsMultiplier;
}
cairo_win32_scaled_font_done_font(scaledFont);
m_isSystemFont = false;
m_scriptCache = 0;
m_scriptFontProperties = 0;
RestoreDC(hdc, -1);
ReleaseDC(0, hdc);
}
void SimpleFontData::platformCharWidthInit()
{
// charwidths are set in platformInit.
}
float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
{
if (m_platformData.useGDI())
return widthForGDIGlyph(glyph);
HDC hdc = GetDC(0);
SaveDC(hdc);
cairo_scaled_font_t* scaledFont = m_platformData.scaledFont();
cairo_win32_scaled_font_select_font(scaledFont, hdc);
int width;
GetCharWidthI(hdc, glyph, 1, 0, &width);
cairo_win32_scaled_font_done_font(scaledFont);
RestoreDC(hdc, -1);
ReleaseDC(0, hdc);
const double metricsMultiplier = cairo_win32_scaled_font_get_metrics_factor(scaledFont) * m_platformData.size();
return width * metricsMultiplier;
}
void SimpleFontData::setFont(cairo_t* cr) const
{
ASSERT(cr);
m_platformData.setFont(cr);
}
}
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