Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/win/SimpleFontDataWin.cpp

-/*
- * Copyright (C) 2006, 2007 Apple Inc. All Rights Reserved.
- * Copyright (c) 2008, 2009, Google 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:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
- * OWNER OR 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 "core/platform/graphics/SimpleFontData.h"
-
-#include <mlang.h>
-#include <objidl.h>
-#include <unicode/uchar.h>
-#include <unicode/unorm.h>
-#include "core/platform/graphics/Font.h"
-#include "core/platform/graphics/FontCache.h"
-#include "core/platform/graphics/win/FontPlatformDataWin.h"
-#include "platform/fonts/FontDescription.h"
-#include "platform/geometry/FloatRect.h"
-#include "platform/win/HWndDC.h"
-#include "wtf/MathExtras.h"
-
-namespace WebCore {
-
-void SimpleFontData::platformInit()
-{
-    if (!m_platformData.size()) {
-        m_fontMetrics.reset();
-        m_avgCharWidth = 0;
-        m_maxCharWidth = 0;
-        return;
-    }
-
-    HWndDC dc(0);
-    HGDIOBJ oldFont = SelectObject(dc, m_platformData.hfont());
-
-    TEXTMETRIC textMetric = {0};
-    if (!GetTextMetrics(dc, &textMetric)) {
-        if (FontPlatformData::ensureFontLoaded(m_platformData.hfont())) {
-            // Retry GetTextMetrics.
-            // FIXME: Handle gracefully the error if this call also fails.
-            // See http://crbug.com/6401.
-            if (!GetTextMetrics(dc, &textMetric))
-                WTF_LOG_ERROR("Unable to get the text metrics after second attempt");
-        }
-    }
-
-    m_avgCharWidth = textMetric.tmAveCharWidth;
-    m_maxCharWidth = textMetric.tmMaxCharWidth;
-
-    // FIXME: Access ascent/descent/lineGap with floating point precision.
-    float ascent = textMetric.tmAscent;
-    float descent = textMetric.tmDescent;
-    float lineGap = textMetric.tmExternalLeading;
-    float xHeight = ascent * 0.56f; // Best guess for xHeight for non-Truetype fonts.
-
-    OUTLINETEXTMETRIC outlineTextMetric;
-    if (GetOutlineTextMetrics(dc, sizeof(outlineTextMetric), &outlineTextMetric) > 0) {
-        m_fontMetrics.setUnitsPerEm(outlineTextMetric.otmEMSquare);
-
-        // This is a TrueType font.  We might be able to get an accurate xHeight.
-        GLYPHMETRICS glyphMetrics = {0};
-        MAT2 identityMatrix = {{0, 1}, {0, 0}, {0, 0}, {0, 1}};
-        DWORD len = GetGlyphOutlineW(dc, 'x', GGO_METRICS, &glyphMetrics, 0, 0, &identityMatrix);
-        if (len != GDI_ERROR && glyphMetrics.gmBlackBoxY > 0)
-            xHeight = static_cast<float>(glyphMetrics.gmBlackBoxY);
-    }
-
-    m_fontMetrics.setAscent(ascent);
-    m_fontMetrics.setDescent(descent);
-    m_fontMetrics.setLineGap(lineGap);
-    m_fontMetrics.setXHeight(xHeight);
-    m_fontMetrics.setLineSpacing(ascent + descent + lineGap);
-
-    SelectObject(dc, oldFont);
-}
-
-void SimpleFontData::platformCharWidthInit()
-{
-    // charwidths are set in platformInit.
-}
-
-void SimpleFontData::platformDestroy()
-{
-}
-
-PassRefPtr<SimpleFontData> SimpleFontData::platformCreateScaledFontData(const FontDescription& fontDescription, float scaleFactor) const
-{
-    LOGFONT winFont;
-    GetObject(m_platformData.hfont(), sizeof(LOGFONT), &winFont);
-    float scaledSize = scaleFactor * fontDescription.computedSize();
-    winFont.lfHeight = -lroundf(scaledSize);
-    HFONT hfont = CreateFontIndirect(&winFont);
-    return SimpleFontData::create(FontPlatformData(hfont, scaledSize, m_platformData.orientation()), isCustomFont() ? CustomFontData::create(false) : 0);
-}
-
-bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
-{
-  // This used to be implemented with IMLangFontLink2, but since that code has
-  // been disabled, this would always return false anyway.
-  return false;
-}
-
-void SimpleFontData::determinePitch()
-{
-    m_treatAsFixedPitch = platformData().isFixedPitch();
-}
-
-FloatRect SimpleFontData::platformBoundsForGlyph(Glyph glyph) const
-{
-    HWndDC hdc(0);
-    SetGraphicsMode(hdc, GM_ADVANCED);
-    HGDIOBJ oldFont = SelectObject(hdc, m_platformData.hfont());
-
-    GLYPHMETRICS gdiMetrics;
-    static const MAT2 identity = { 0, 1,  0, 0,  0, 0,  0, 1 };
-    if (GetGlyphOutline(hdc, glyph, GGO_METRICS | GGO_GLYPH_INDEX, &gdiMetrics, 0, 0, &identity) == -1) {
-        if (FontPlatformData::ensureFontLoaded(m_platformData.hfont())) {
-            // Retry GetTextMetrics.
-            // FIXME: Handle gracefully the error if this call also fails.
-            // See http://crbug.com/6401.
-            if (GetGlyphOutline(hdc, glyph, GGO_METRICS | GGO_GLYPH_INDEX, &gdiMetrics, 0, 0, &identity) == -1)
-                WTF_LOG_ERROR("Unable to get the glyph metrics after second attempt");
-        }
-    }
-
-    SelectObject(hdc, oldFont);
-
-    return FloatRect(gdiMetrics.gmptGlyphOrigin.x, -gdiMetrics.gmptGlyphOrigin.y,
-        gdiMetrics.gmBlackBoxX, gdiMetrics.gmBlackBoxY);
-}
-
-float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
-{
-    if (!m_platformData.size())
-        return 0;
-
-    HWndDC dc(0);
-    HGDIOBJ oldFont = SelectObject(dc, m_platformData.hfont());
-
-    int width = 0;
-    if (!GetCharWidthI(dc, glyph, 1, 0, &width)) {
-        // Ask the browser to preload the font and retry.
-        if (FontPlatformData::ensureFontLoaded(m_platformData.hfont())) {
-            // FIXME: Handle gracefully the error if this call also fails.
-            // See http://crbug.com/6401.
-            if (!GetCharWidthI(dc, glyph, 1, 0, &width))
-                WTF_LOG_ERROR("Unable to get the char width after second attempt");
-        }
-    }
-
-    SelectObject(dc, oldFont);
-
-    return static_cast<float>(width);
-}
-
-}  // namespace WebCore