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Diffstat (limited to 'WebCore/platform/graphics/chromium/SimpleFontDataLinux.cpp')
| -rw-r--r-- | WebCore/platform/graphics/chromium/SimpleFontDataLinux.cpp | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/WebCore/platform/graphics/chromium/SimpleFontDataLinux.cpp b/WebCore/platform/graphics/chromium/SimpleFontDataLinux.cpp deleted file mode 100644 index 355d837..0000000 --- a/WebCore/platform/graphics/chromium/SimpleFontDataLinux.cpp +++ /dev/null @@ -1,236 +0,0 @@ -/* - * 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 "SimpleFontData.h" - -#include "Font.h" -#include "FontCache.h" -#include "FloatRect.h" -#include "FontDescription.h" -#include "Logging.h" -#include "VDMXParser.h" - -#include "SkFontHost.h" -#include "SkPaint.h" -#include "SkTime.h" -#include "SkTypeface.h" -#include "SkTypes.h" - -namespace WebCore { - -// Smallcaps versions of fonts are 70% the size of the normal font. -static const float smallCapsFraction = 0.7f; -static const float emphasisMarkFraction = .5; -// This is the largest VDMX table which we'll try to load and parse. -static const size_t maxVDMXTableSize = 1024 * 1024; // 1 MB - -void SimpleFontData::platformInit() -{ - if (!m_platformData.size()) { - m_ascent = 0; - m_descent = 0; - m_lineGap = 0; - m_lineSpacing = 0; - m_avgCharWidth = 0; - m_maxCharWidth = 0; - m_xHeight = 0; - m_unitsPerEm = 0; - return; - } - - SkPaint paint; - SkPaint::FontMetrics metrics; - - m_platformData.setupPaint(&paint); - paint.getFontMetrics(&metrics); - const SkFontID fontID = m_platformData.uniqueID(); - - static const uint32_t vdmxTag = SkSetFourByteTag('V', 'D', 'M', 'X'); - int pixelSize = m_platformData.size() + 0.5; - int vdmxAscent, vdmxDescent; - bool isVDMXValid = false; - - size_t vdmxSize = SkFontHost::GetTableSize(fontID, vdmxTag); - if (vdmxSize && vdmxSize < maxVDMXTableSize) { - uint8_t* vdmxTable = (uint8_t*) fastMalloc(vdmxSize); - if (vdmxTable - && SkFontHost::GetTableData(fontID, vdmxTag, 0, vdmxSize, vdmxTable) == vdmxSize - && parseVDMX(&vdmxAscent, &vdmxDescent, vdmxTable, vdmxSize, pixelSize)) - isVDMXValid = true; - fastFree(vdmxTable); - } - - // Beware those who step here: This code is designed to match Win32 font - // metrics *exactly*. - if (isVDMXValid) { - m_ascent = vdmxAscent; - m_descent = -vdmxDescent; - } else { - SkScalar height = -metrics.fAscent + metrics.fDescent + metrics.fLeading; - m_ascent = SkScalarRound(-metrics.fAscent); - m_descent = SkScalarRound(height) - m_ascent; - } - - if (metrics.fXHeight) - m_xHeight = metrics.fXHeight; - else { - // hack taken from the Windows port - m_xHeight = static_cast<float>(m_ascent) * 0.56; - } - - m_lineGap = SkScalarRound(metrics.fLeading); - m_lineSpacing = m_ascent + m_descent + m_lineGap; - - if (m_orientation == Vertical) { - static const uint32_t vheaTag = SkSetFourByteTag('v', 'h', 'e', 'a'); - static const uint32_t vorgTag = SkSetFourByteTag('V', 'O', 'R', 'G'); - size_t vheaSize = SkFontHost::GetTableSize(fontID, vheaTag); - size_t vorgSize = SkFontHost::GetTableSize(fontID, vorgTag); - if ((vheaSize <= 0) && (vorgSize <= 0)) - m_orientation = Horizontal; - } - - // In WebKit/WebCore/platform/graphics/SimpleFontData.cpp, m_spaceWidth is - // calculated for us, but we need to calculate m_maxCharWidth and - // m_avgCharWidth in order for text entry widgets to be sized correctly. - - SkScalar xRange = metrics.fXMax - metrics.fXMin; - m_maxCharWidth = SkScalarRound(xRange * SkScalarRound(m_platformData.size())); - - if (metrics.fAvgCharWidth) - m_avgCharWidth = SkScalarRound(metrics.fAvgCharWidth); - else { - m_avgCharWidth = m_xHeight; - - GlyphPage* glyphPageZero = GlyphPageTreeNode::getRootChild(this, 0)->page(); - - if (glyphPageZero) { - static const UChar32 x_char = 'x'; - const Glyph xGlyph = glyphPageZero->glyphDataForCharacter(x_char).glyph; - - if (xGlyph) - m_avgCharWidth = widthForGlyph(xGlyph); - } - } -} - -void SimpleFontData::platformCharWidthInit() -{ - // charwidths are set in platformInit. -} - -void SimpleFontData::platformDestroy() -{ -} - -SimpleFontData* SimpleFontData::scaledFontData(const FontDescription& fontDescription, float scaleFactor) const -{ - const float scaledSize = lroundf(fontDescription.computedSize() * scaleFactor); - return new SimpleFontData(FontPlatformData(m_platformData, scaledSize), isCustomFont(), false); -} - -SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const -{ - if (!m_derivedFontData) - m_derivedFontData = DerivedFontData::create(isCustomFont()); - if (!m_derivedFontData->smallCaps) - m_derivedFontData->smallCaps = scaledFontData(fontDescription, smallCapsFraction); - - return m_derivedFontData->smallCaps.get(); -} - -SimpleFontData* SimpleFontData::emphasisMarkFontData(const FontDescription& fontDescription) const -{ - if (!m_derivedFontData) - m_derivedFontData = DerivedFontData::create(isCustomFont()); - if (!m_derivedFontData->emphasisMark) - m_derivedFontData->emphasisMark = scaledFontData(fontDescription, emphasisMarkFraction); - - return m_derivedFontData->emphasisMark.get(); -} - -bool SimpleFontData::containsCharacters(const UChar* characters, int length) const -{ - SkPaint paint; - static const unsigned maxBufferCount = 64; - uint16_t glyphs[maxBufferCount]; - - m_platformData.setupPaint(&paint); - paint.setTextEncoding(SkPaint::kUTF16_TextEncoding); - - while (length > 0) { - int n = SkMin32(length, SK_ARRAY_COUNT(glyphs)); - - // textToGlyphs takes a byte count so we double the character count. - int count = paint.textToGlyphs(characters, n * 2, glyphs); - for (int i = 0; i < count; i++) { - if (0 == glyphs[i]) - return false; // missing glyph - } - - characters += n; - length -= n; - } - - return true; -} - -void SimpleFontData::determinePitch() -{ - m_treatAsFixedPitch = platformData().isFixedPitch(); -} - -FloatRect SimpleFontData::platformBoundsForGlyph(Glyph) const -{ - return FloatRect(); -} - -float SimpleFontData::platformWidthForGlyph(Glyph glyph) const -{ - if (!m_platformData.size()) - return 0; - - SkASSERT(sizeof(glyph) == 2); // compile-time assert - - SkPaint paint; - - m_platformData.setupPaint(&paint); - - paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); - SkScalar width = paint.measureText(&glyph, 2); - - // Though WebKit supports non-integral advances, Skia only supports them - // for "subpixel" (distinct from LCD subpixel antialiasing) text, which - // we don't use. - return round(SkScalarToFloat(width)); -} - -} // namespace WebCore |