| /* |
| * 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; |
| } |
| |
| } |