18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * Copyright (C) 2007, 2008, 2009, 2010 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: 706ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * 1. Redistributions of source code must retain the above copyright 806ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * notice, this list of conditions and the following disclaimer. 906ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * 2. Redistributions in binary form must reproduce the above copyright 1006ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * notice, this list of conditions and the following disclaimer in the 1106ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * documentation and/or other materials provided with the distribution. 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * 1306ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 1406ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 1506ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 1606ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 1706ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 1806ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 1906ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2006ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2106ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 2306ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen * THE POSSIBILITY OF SUCH DAMAGE. 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h" 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "UniscribeController.h" 288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "Font.h" 298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "SimpleFontData.h" 30ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch#include "TextRun.h" 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <wtf/MathExtras.h> 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 33dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Blockusing namespace std; 34dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block 358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace WebCore { 368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project// FIXME: Rearchitect this to be more like WidthIterator in Font.cpp. Have an advance() method 388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project// that does stuff in that method instead of doing everything in the constructor. Have advance() 398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project// take the GlyphBuffer as an arg so that we don't have to populate the glyph buffer when 408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project// measuring. 415f1ab04193ad0130ca8204aadaceae083aca9881Feng QianUniscribeController::UniscribeController(const Font* font, const TextRun& run, HashSet<const SimpleFontData*>* fallbackFonts) 42dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block : m_font(*font) 43dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_run(run) 44dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_fallbackFonts(fallbackFonts) 45dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_minGlyphBoundingBoxX(numeric_limits<float>::max()) 46dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_maxGlyphBoundingBoxX(numeric_limits<float>::min()) 47dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_minGlyphBoundingBoxY(numeric_limits<float>::max()) 48dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_maxGlyphBoundingBoxY(numeric_limits<float>::min()) 49dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_end(run.length()) 50dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_currentCharacter(0) 51dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_runWidthSoFar(0) 522fc2651226baac27029e38c9d6ef883fa32084dbSteve Block , m_padding(run.expansion()) 53dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_computingOffsetPosition(false) 54dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_includePartialGlyphs(false) 55dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_offsetX(0) 56dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block , m_offsetPosition(0) 578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 588e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!m_padding) 598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_padPerSpace = 0; 608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project else { 618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project float numSpaces = 0; 6206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen for (int s = 0; s < m_run.length(); s++) { 638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (Font::treatAsSpace(m_run[s])) 648e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project numSpaces++; 6506ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen } 668e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 678e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (numSpaces == 0) 688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_padPerSpace = 0; 698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project else 7006ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen m_padPerSpace = m_padding / numSpaces; 718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 728e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 738e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Null out our uniscribe structs 748e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project resetControlAndState(); 758e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 768e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectint UniscribeController::offsetForPosition(int x, bool includePartialGlyphs) 788e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 798e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_computingOffsetPosition = true; 808e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_includePartialGlyphs = includePartialGlyphs; 818e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_offsetX = x; 828e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_offsetPosition = 0; 838e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advance(m_run.length()); 848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_computingOffsetPosition) { 858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // The point is to the left or to the right of the entire run. 868e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_offsetX >= m_runWidthSoFar && m_run.ltr() || m_offsetX < 0 && m_run.rtl()) 878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_offsetPosition = m_end; 888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 898e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_computingOffsetPosition = false; 908e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return m_offsetPosition; 918e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 928e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid UniscribeController::advance(unsigned offset, GlyphBuffer* glyphBuffer) 948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // FIXME: We really want to be using a newer version of Uniscribe that supports the new OpenType 968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // functions. Those functions would allow us to turn off kerning and ligatures. Without being able 978e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // to do that, we will have buggy line breaking and metrics when simple and complex text are close 988e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // together (the complex code path will narrow the text because of kerning and ligatures and then 998e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // when bidi processing splits into multiple runs, the simple portions will get wider and cause us to 1008e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // spill off the edge of a line). 1018e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (static_cast<int>(offset) > m_end) 1028e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project offset = m_end; 1038e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1048e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Itemize the string. 1058e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const UChar* cp = m_run.data(m_currentCharacter); 1068e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int length = offset - m_currentCharacter; 1078e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (length <= 0) 1088e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return; 1098e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project unsigned baseCharacter = m_currentCharacter; 1118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // We break up itemization of the string by fontData and (if needed) the use of small caps. 1138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // FIXME: It's inconsistent that we use logical order when itemizing, since this 1158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // does not match normal RTL. 1168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // FIXME: This function should decode surrogate pairs. Currently it makes little difference that 1188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // it does not because the font cache on Windows does not support non-BMP characters. 1198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<UChar, 256> smallCapsBuffer; 1208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_font.isSmallCaps()) 1218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project smallCapsBuffer.resize(length); 1228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project unsigned indexOfFontTransition = m_run.rtl() ? length - 1 : 0; 1248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const UChar* curr = m_run.rtl() ? cp + length - 1 : cp; 1258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const UChar* end = m_run.rtl() ? cp - 1 : cp + length; 1268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const SimpleFontData* fontData; 1288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const SimpleFontData* nextFontData = m_font.glyphDataForCharacter(*curr, false).fontData; 1298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project UChar newC = 0; 1318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project bool isSmallCaps; 1338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project bool nextIsSmallCaps = m_font.isSmallCaps() && !(U_GET_GC_MASK(*curr) & U_GC_M_MASK) && (newC = u_toupper(*curr)) != *curr; 1348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (nextIsSmallCaps) 1368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project smallCapsBuffer[curr - cp] = newC; 1378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project while (true) { 1398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project curr = m_run.rtl() ? curr - 1 : curr + 1; 1408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (curr == end) 1418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project break; 1428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project fontData = nextFontData; 1448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project isSmallCaps = nextIsSmallCaps; 1458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int index = curr - cp; 1468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project UChar c = *curr; 1478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project bool forceSmallCaps = isSmallCaps && (U_GET_GC_MASK(c) & U_GC_M_MASK); 149f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch nextFontData = m_font.glyphDataForCharacter(*curr, false, forceSmallCaps ? SmallCapsVariant : AutoVariant).fontData; 1508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_font.isSmallCaps()) { 1518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project nextIsSmallCaps = forceSmallCaps || (newC = u_toupper(c)) != c; 1528e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (nextIsSmallCaps) 1538e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project smallCapsBuffer[index] = forceSmallCaps ? c : newC; 1548e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1558e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1565f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian if (m_fallbackFonts && nextFontData != fontData && fontData != m_font.primaryFont()) 1575f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian m_fallbackFonts->add(fontData); 1585f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian 1598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (nextFontData != fontData || nextIsSmallCaps != isSmallCaps) { 1608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int itemStart = m_run.rtl() ? index + 1 : indexOfFontTransition; 1618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int itemLength = m_run.rtl() ? indexOfFontTransition - index : index - indexOfFontTransition; 1628e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_currentCharacter = baseCharacter + itemStart; 1638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project itemizeShapeAndPlace((isSmallCaps ? smallCapsBuffer.data() : cp) + itemStart, itemLength, fontData, glyphBuffer); 1648e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project indexOfFontTransition = index; 1658e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1668e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1678e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int itemLength = m_run.rtl() ? indexOfFontTransition + 1 : length - indexOfFontTransition; 1698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (itemLength) { 1705f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian if (m_fallbackFonts && nextFontData != m_font.primaryFont()) 1715f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian m_fallbackFonts->add(nextFontData); 1725f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian 1738e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int itemStart = m_run.rtl() ? 0 : indexOfFontTransition; 1748e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_currentCharacter = baseCharacter + itemStart; 1758e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project itemizeShapeAndPlace((nextIsSmallCaps ? smallCapsBuffer.data() : cp) + itemStart, itemLength, nextFontData, glyphBuffer); 1768e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1788e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_currentCharacter = baseCharacter + length; 1798e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1808e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1818e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid UniscribeController::itemizeShapeAndPlace(const UChar* cp, unsigned length, const SimpleFontData* fontData, GlyphBuffer* glyphBuffer) 1828e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 1838e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // ScriptItemize (in Windows XP versions prior to SP2) can overflow by 1. This is why there is an extra empty item 1848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // hanging out at the end of the array 1858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_items.resize(6); 1868e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int numItems = 0; 1878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project while (ScriptItemize(cp, length, m_items.size() - 1, &m_control, &m_state, m_items.data(), &numItems) == E_OUTOFMEMORY) { 1888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_items.resize(m_items.size() * 2); 1898e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project resetControlAndState(); 1908e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1918e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_items.resize(numItems + 1); 1928e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_run.rtl()) { 1948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project for (int i = m_items.size() - 2; i >= 0; i--) { 1958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!shapeAndPlaceItem(cp, i, fontData, glyphBuffer)) 1968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return; 1978e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1988e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } else { 1998e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project for (unsigned i = 0; i < m_items.size() - 1; i++) { 2008e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!shapeAndPlaceItem(cp, i, fontData, glyphBuffer)) 2018e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return; 2028e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 2038e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 2048e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 2058e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2068e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid UniscribeController::resetControlAndState() 2078e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 2088e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project memset(&m_control, 0, sizeof(SCRIPT_CONTROL)); 2098e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project memset(&m_state, 0, sizeof(SCRIPT_STATE)); 2108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Set up the correct direction for the run. 2128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_state.uBidiLevel = m_run.rtl(); 2138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Lock the correct directional override. 2158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_state.fOverrideDirection = m_run.directionalOverride(); 2168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 2178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectbool UniscribeController::shapeAndPlaceItem(const UChar* cp, unsigned i, const SimpleFontData* fontData, GlyphBuffer* glyphBuffer) 2198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 2208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Determine the string for this item. 2218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project const UChar* str = cp + m_items[i].iCharPos; 2228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int len = m_items[i+1].iCharPos - m_items[i].iCharPos; 2238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project SCRIPT_ITEM item = m_items[i]; 2248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Set up buffers to hold the results of shaping the item. 2268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<WORD> glyphs; 2278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<WORD> clusters; 2288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<SCRIPT_VISATTR> visualAttributes; 2298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project clusters.resize(len); 2308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Shape the item. 2328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // The recommended size for the glyph buffer is 1.5 * the character length + 16 in the uniscribe docs. 2338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Apparently this is a good size to avoid having to make repeated calls to ScriptShape. 2348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project glyphs.resize(1.5 * len + 16); 2358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project visualAttributes.resize(glyphs.size()); 2368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!shape(str, len, item, fontData, glyphs, clusters, visualAttributes)) 2388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return true; 2398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // We now have a collection of glyphs. 2418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<GOFFSET> offsets; 2428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<int> advances; 2438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project offsets.resize(glyphs.size()); 2448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advances.resize(glyphs.size()); 2458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int glyphCount = 0; 2468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HRESULT placeResult = ScriptPlace(0, fontData->scriptCache(), glyphs.data(), glyphs.size(), visualAttributes.data(), 2478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project &item.a, advances.data(), offsets.data(), 0); 2488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (placeResult == E_PENDING) { 2498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // The script cache isn't primed with enough info yet. We need to select our HFONT into 2508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // a DC and pass the DC in to ScriptPlace. 2518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HDC hdc = GetDC(0); 2528e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HFONT hfont = fontData->platformData().hfont(); 2538e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HFONT oldFont = (HFONT)SelectObject(hdc, hfont); 2548e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project placeResult = ScriptPlace(hdc, fontData->scriptCache(), glyphs.data(), glyphs.size(), visualAttributes.data(), 2558e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project &item.a, advances.data(), offsets.data(), 0); 2568e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project SelectObject(hdc, oldFont); 2578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project ReleaseDC(0, hdc); 2588e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 2598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (FAILED(placeResult) || glyphs.isEmpty()) 2618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return true; 2628e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Convert all chars that should be treated as spaces to use the space glyph. 26481bc750723a18f21cd17d1b173cd2a4dda9cea6eBen Murdoch // We also create a map that allows us to quickly go from space glyphs back to their corresponding characters. 2658e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<int> spaceCharacters(glyphs.size()); 2668e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project spaceCharacters.fill(-1); 2678e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2685f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian const float cLogicalScale = fontData->platformData().useGDI() ? 1.0f : 32.0f; 2695f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian unsigned logicalSpaceWidth = fontData->spaceWidth() * cLogicalScale; 27081bc750723a18f21cd17d1b173cd2a4dda9cea6eBen Murdoch float spaceWidth = fontData->spaceWidth(); 2718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2728e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project for (int k = 0; k < len; k++) { 2738e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project UChar ch = *(str + k); 2746b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner bool treatAsSpace = Font::treatAsSpace(ch); 2756b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner bool treatAsZeroWidthSpace = ch == zeroWidthSpace || Font::treatAsZeroWidthSpace(ch); 2766b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner if (treatAsSpace || treatAsZeroWidthSpace) { 2778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Substitute in the space glyph at the appropriate place in the glyphs 2788e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // array. 2795f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian glyphs[clusters[k]] = fontData->spaceGlyph(); 2806b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner advances[clusters[k]] = treatAsSpace ? logicalSpaceWidth : 0; 2816b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner if (treatAsSpace) 2826b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner spaceCharacters[clusters[k]] = m_currentCharacter + k + item.iCharPos; 2838e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 2848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 2858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2868e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Populate our glyph buffer with this information. 2878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project bool hasExtraSpacing = m_font.letterSpacing() || m_font.wordSpacing() || m_padding; 2888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2898e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project float leftEdge = m_runWidthSoFar; 2908e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2918e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project for (unsigned k = 0; k < glyphs.size(); k++) { 2928e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Glyph glyph = glyphs[k]; 2938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project float advance = advances[k] / cLogicalScale; 2948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project float offsetX = offsets[k].du / cLogicalScale; 2958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project float offsetY = offsets[k].dv / cLogicalScale; 2968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 2978e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Match AppKit's rules for the integer vs. non-integer rendering modes. 2988e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project float roundedAdvance = roundf(advance); 2998e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!m_font.isPrinterFont() && !fontData->isSystemFont()) { 3008e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advance = roundedAdvance; 3018e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project offsetX = roundf(offsetX); 3028e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project offsetY = roundf(offsetY); 3038e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3048e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3055f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian advance += fontData->syntheticBoldOffset(); 3068e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3078e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (hasExtraSpacing) { 3088e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // If we're a glyph with an advance, go ahead and add in letter-spacing. 3098e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // That way we weed out zero width lurkers. This behavior matches the fast text code path. 3108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (advance && m_font.letterSpacing()) 3118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advance += m_font.letterSpacing(); 3128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Handle justification and word-spacing. 3146b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner int characterIndex = spaceCharacters[k]; 3156b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner // characterIndex is left at the initial value of -1 for glyphs that do not map back to treated-as-space characters. 3166b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner if (characterIndex != -1) { 3178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Account for padding. WebCore uses space padding to justify text. 3188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // We distribute the specified padding over the available spaces in the run. 3198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_padding) { 3208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Use leftover padding if not evenly divisible by number of spaces. 3218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_padding < m_padPerSpace) { 3228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advance += m_padding; 3238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_padding = 0; 3248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } else { 3258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_padding -= m_padPerSpace; 32681bc750723a18f21cd17d1b173cd2a4dda9cea6eBen Murdoch advance += m_padPerSpace; 3278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Account for word-spacing. 3318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (characterIndex > 0 && !Font::treatAsSpace(*m_run.data(characterIndex - 1)) && m_font.wordSpacing()) 3328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advance += m_font.wordSpacing(); 3338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3358e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_runWidthSoFar += advance; 3378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // FIXME: We need to take the GOFFSETS for combining glyphs and store them in the glyph buffer 3398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // as well, so that when the time comes to draw those glyphs, we can apply the appropriate 3408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // translation. 3418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (glyphBuffer) { 3428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project FloatSize size(offsetX, -offsetY); 3438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project glyphBuffer->add(glyph, fontData, advance, &size); 3448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 34621939df44de1705786c545cd1bf519d47250322dBen Murdoch FloatRect glyphBounds = fontData->boundsForGlyph(glyph); 34721939df44de1705786c545cd1bf519d47250322dBen Murdoch glyphBounds.move(m_glyphOrigin.x(), m_glyphOrigin.y()); 34821939df44de1705786c545cd1bf519d47250322dBen Murdoch m_minGlyphBoundingBoxX = min(m_minGlyphBoundingBoxX, glyphBounds.x()); 3492fc2651226baac27029e38c9d6ef883fa32084dbSteve Block m_maxGlyphBoundingBoxX = max(m_maxGlyphBoundingBoxX, glyphBounds.maxX()); 35021939df44de1705786c545cd1bf519d47250322dBen Murdoch m_minGlyphBoundingBoxY = min(m_minGlyphBoundingBoxY, glyphBounds.y()); 3512fc2651226baac27029e38c9d6ef883fa32084dbSteve Block m_maxGlyphBoundingBoxY = max(m_maxGlyphBoundingBoxY, glyphBounds.maxY()); 352dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block m_glyphOrigin.move(advance + offsetX, -offsetY); 353dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block 3548e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Mutate the glyph array to contain our altered advances. 3558e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (m_computingOffsetPosition) 3568e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advances[k] = advance; 3578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3588e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3598e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project while (m_computingOffsetPosition && m_offsetX >= leftEdge && m_offsetX < m_runWidthSoFar) { 3608e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // The position is somewhere inside this run. 3618e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int trailing = 0; 3628e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project ScriptXtoCP(m_offsetX - leftEdge, clusters.size(), glyphs.size(), clusters.data(), visualAttributes.data(), 3638e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project advances.data(), &item.a, &m_offsetPosition, &trailing); 3648e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (trailing && m_includePartialGlyphs && m_offsetPosition < len - 1) { 3658e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_offsetPosition += m_currentCharacter + m_items[i].iCharPos; 3668e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_offsetX += m_run.rtl() ? -trailing : trailing; 3678e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } else { 3688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_computingOffsetPosition = false; 3698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_offsetPosition += m_currentCharacter + m_items[i].iCharPos; 3708e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (trailing && m_includePartialGlyphs) 3718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_offsetPosition++; 3728e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return false; 3738e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3748e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 3758e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3768e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return true; 3778e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 3788e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3798e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectbool UniscribeController::shape(const UChar* str, int len, SCRIPT_ITEM item, const SimpleFontData* fontData, 3808e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<WORD>& glyphs, Vector<WORD>& clusters, 3818e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Vector<SCRIPT_VISATTR>& visualAttributes) 3828e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 3838e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HDC hdc = 0; 3848e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HFONT oldFont = 0; 3858e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HRESULT shapeResult = E_PENDING; 3868e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project int glyphCount = 0; 3878e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project do { 3888e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project shapeResult = ScriptShape(hdc, fontData->scriptCache(), str, len, glyphs.size(), &item.a, 3898e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project glyphs.data(), clusters.data(), visualAttributes.data(), &glyphCount); 3908e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (shapeResult == E_PENDING) { 3918e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // The script cache isn't primed with enough info yet. We need to select our HFONT into 3928e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // a DC and pass the DC in to ScriptShape. 3938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project ASSERT(!hdc); 3948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project hdc = GetDC(0); 3958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project HFONT hfont = fontData->platformData().hfont(); 3968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project oldFont = (HFONT)SelectObject(hdc, hfont); 3978e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } else if (shapeResult == E_OUTOFMEMORY) { 3988e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Need to resize our buffers. 3998e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project glyphs.resize(glyphs.size() * 2); 4008e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project visualAttributes.resize(glyphs.size()); 4018e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 4028e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } while (shapeResult == E_PENDING || shapeResult == E_OUTOFMEMORY); 4038e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 4048e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (hdc) { 4058e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project SelectObject(hdc, oldFont); 4068e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project ReleaseDC(0, hdc); 4078e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 4088e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 4098e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (FAILED(shapeResult)) 4108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return false; 4118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 4128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project glyphs.shrink(glyphCount); 4138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project visualAttributes.shrink(glyphCount); 4148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 4158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return true; 4168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 4178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 4188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 419