/* | |
* 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 <cairo.h> | |
#include <cairo-win32.h> | |
#include <mlang.h> | |
#include <tchar.h> | |
#include <wtf/MathExtras.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; | |
} | |
} |