1 files changed, 131 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/win/SimpleFontDataCairoWin.cpp b/WebCore/platform/graphics/win/SimpleFontDataCairoWin.cpp
new file mode 100644
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--- /dev/null
+++ b/WebCore/platform/graphics/win/SimpleFontDataCairoWin.cpp
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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 "NotImplemented.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 = 0;
+
+    if (m_font.useGDI())
+       return initGDIFont();
+
+    HDC hdc = GetDC(0);
+    SaveDC(hdc);
+
+    cairo_scaled_font_t* scaledFont = m_font.scaledFont();
+    const double metricsMultiplier = cairo_win32_scaled_font_get_metrics_factor(scaledFont) * m_font.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;
+
+    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::platformDestroy()
+{
+    cairo_font_face_destroy(m_font.fontFace());
+    cairo_scaled_font_destroy(m_font.scaledFont());
+
+    DeleteObject(m_font.hfont());
+
+    platformCommonDestroy();
+}
+
+float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
+{
+    if (m_font.useGDI())
+       return widthForGDIGlyph(glyph);
+
+    HDC hdc = GetDC(0);
+    SaveDC(hdc);
+
+    cairo_scaled_font_t* scaledFont = m_font.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_font.size();
+    return width * metricsMultiplier;
+}
+
+void SimpleFontData::setFont(cairo_t* cr) const
+{
+    ASSERT(cr);
+    m_font.setFont(cr);
+}
+
+}