18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/*
28e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Copyright (C) 2008 Apple Inc.  All rights reserved.
38e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project *
48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Redistribution and use in source and binary forms, with or without
58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * modification, are permitted provided that the following conditions
68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * are met:
78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project *
88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 1.  Redistributions of source code must retain the above copyright
98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project *     notice, this list of conditions and the following disclaimer.
108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 2.  Redistributions in binary form must reproduce the above copyright
118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project *     notice, this list of conditions and the following disclaimer in the
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148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project *     its contributors may be used to endorse or promote products derived
158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project *     from this software without specific prior written permission.
168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project *
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278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */
288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h"
308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "SimpleFontData.h"
318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <windows.h>
338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "Font.h"
358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "FontCache.h"
368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "FontDescription.h"
378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <cairo.h>
388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <cairo-win32.h>
398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <mlang.h>
40cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block#include <wtf/MathExtras.h>
418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace WebCore {
438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid SimpleFontData::platformInit()
458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{
468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    m_scriptCache = 0;
478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    m_scriptFontProperties = 0;
488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    m_isSystemFont = false;
498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
505f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
515f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian
525f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    if (m_platformData.useGDI())
538e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project       return initGDIFont();
548e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
558e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    HDC hdc = GetDC(0);
568e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    SaveDC(hdc);
578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
585f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    cairo_scaled_font_t* scaledFont = m_platformData.scaledFont();
595f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    const double metricsMultiplier = cairo_win32_scaled_font_get_metrics_factor(scaledFont) * m_platformData.size();
608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    cairo_win32_scaled_font_select_font(scaledFont, hdc);
628e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    TEXTMETRIC textMetrics;
648e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    GetTextMetrics(hdc, &textMetrics);
652fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    float ascent = textMetrics.tmAscent * metricsMultiplier;
662fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    float descent = textMetrics.tmDescent * metricsMultiplier;
672fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    float xHeight = ascent * 0.56f; // Best guess for xHeight for non-Truetype fonts.
682fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    float lineGap = textMetrics.tmExternalLeading * metricsMultiplier;
692fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    m_fontMetrics.setAscent(ascent);
702fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    m_fontMetrics.setDescent(descent);
712fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    m_fontMetrics.setLineGap(lineGap);
722fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    m_fontMetrics.setLineSpacing(lroundf(ascent) + lroundf(descent) + lroundf(lineGap));
732fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    m_avgCharWidth = textMetrics.tmAveCharWidth * metricsMultiplier;
742fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    m_maxCharWidth = textMetrics.tmMaxCharWidth * metricsMultiplier;
758e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
768e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    OUTLINETEXTMETRIC metrics;
778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    if (GetOutlineTextMetrics(hdc, sizeof(metrics), &metrics) > 0) {
788e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project        // This is a TrueType font.  We might be able to get an accurate xHeight
798e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project        GLYPHMETRICS gm;
808e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project        MAT2 mat = { 1, 0, 0, 1 };
818e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project        DWORD len = GetGlyphOutline(hdc, 'x', GGO_METRICS, &gm, 0, 0, &mat);
828e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project        if (len != GDI_ERROR && gm.gmptGlyphOrigin.y > 0)
832fc2651226baac27029e38c9d6ef883fa32084dbSteve Block            xHeight = gm.gmptGlyphOrigin.y * metricsMultiplier;
848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    }
858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
862fc2651226baac27029e38c9d6ef883fa32084dbSteve Block    m_fontMetrics.setXHeight(xHeight);
878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    cairo_win32_scaled_font_done_font(scaledFont);
888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
898e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    m_isSystemFont = false;
908e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    m_scriptCache = 0;
918e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    m_scriptFontProperties = 0;
928e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    RestoreDC(hdc, -1);
948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    ReleaseDC(0, hdc);
958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project}
968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
975f1ab04193ad0130ca8204aadaceae083aca9881Feng Qianvoid SimpleFontData::platformCharWidthInit()
985f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian{
995f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    // charwidths are set in platformInit.
1005f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian}
1015f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian
10221939df44de1705786c545cd1bf519d47250322dBen MurdochFloatRect SimpleFontData::platformBoundsForGlyph(Glyph glyph) const
10321939df44de1705786c545cd1bf519d47250322dBen Murdoch{
10421939df44de1705786c545cd1bf519d47250322dBen Murdoch    if (m_platformData.useGDI())
10521939df44de1705786c545cd1bf519d47250322dBen Murdoch        return boundsForGDIGlyph(glyph);
10621939df44de1705786c545cd1bf519d47250322dBen Murdoch    //FIXME: Implement this
10721939df44de1705786c545cd1bf519d47250322dBen Murdoch    return FloatRect();
10821939df44de1705786c545cd1bf519d47250322dBen Murdoch}
10921939df44de1705786c545cd1bf519d47250322dBen Murdoch
1108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectfloat SimpleFontData::platformWidthForGlyph(Glyph glyph) const
1118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{
1125f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    if (m_platformData.useGDI())
1138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project       return widthForGDIGlyph(glyph);
1148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
1158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    HDC hdc = GetDC(0);
1168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    SaveDC(hdc);
1178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
1185f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    cairo_scaled_font_t* scaledFont = m_platformData.scaledFont();
1198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    cairo_win32_scaled_font_select_font(scaledFont, hdc);
1208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
1218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    int width;
1228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    GetCharWidthI(hdc, glyph, 1, 0, &width);
1238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
1248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    cairo_win32_scaled_font_done_font(scaledFont);
1258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
1268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    RestoreDC(hdc, -1);
1278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    ReleaseDC(0, hdc);
1288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
1295f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian    const double metricsMultiplier = cairo_win32_scaled_font_get_metrics_factor(scaledFont) * m_platformData.size();
1308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project    return width * metricsMultiplier;
1318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project}
1328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project
1338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project}
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