mirror of
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129 lines
4.8 KiB
C++
129 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Foundation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2005-2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <stuart@mozilla.com>
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* Masayuki Nakano <masayuki@d-toybox.com>
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* Mats Palmgren <mats.palmgren@bredband.net>
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* John Daggett <jdaggett@mozilla.com>
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* Jonathan Kew <jfkthame@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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//#define FORCE_PR_LOG
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#include "gfxGDIShaper.h"
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/**********************************************************************
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*
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* class gfxGDIShaper
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*
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**********************************************************************/
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bool
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gfxGDIShaper::ShapeWord(gfxContext *aContext,
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gfxShapedWord *aShapedWord,
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const PRUnichar *aString)
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{
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DCFromContext dc(aContext);
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AutoSelectFont selectFont(dc, static_cast<gfxGDIFont*>(mFont)->GetHFONT());
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PRUint32 length = aShapedWord->Length();
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nsAutoTArray<WORD,500> glyphArray;
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if (!glyphArray.SetLength(length)) {
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return false;
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}
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WORD *glyphs = glyphArray.Elements();
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DWORD ret = ::GetGlyphIndicesW(dc, aString, length,
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glyphs, GGI_MARK_NONEXISTING_GLYPHS);
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if (ret == GDI_ERROR) {
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return false;
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}
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for (int k = 0; k < length; k++) {
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if (glyphs[k] == 0xFFFF)
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return false;
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}
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SIZE size;
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nsAutoTArray<int,500> partialWidthArray;
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if (!partialWidthArray.SetLength(length)) {
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return false;
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}
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BOOL success = ::GetTextExtentExPointI(dc,
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glyphs,
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length,
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INT_MAX,
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NULL,
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partialWidthArray.Elements(),
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&size);
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if (!success) {
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return false;
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}
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gfxTextRun::CompressedGlyph g;
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PRUint32 i;
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PRInt32 lastWidth = 0;
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PRUint32 appUnitsPerDevPixel = aShapedWord->AppUnitsPerDevUnit();
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for (i = 0; i < length; ++i) {
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PRUint32 offset = i;
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PRInt32 advancePixels = partialWidthArray[i] - lastWidth;
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lastWidth = partialWidthArray[i];
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PRInt32 advanceAppUnits = advancePixels * appUnitsPerDevPixel;
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WCHAR glyph = glyphs[i];
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NS_ASSERTION(!gfxFontGroup::IsInvalidChar(aShapedWord->GetCharAt(offset)),
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"Invalid character detected!");
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bool atClusterStart = aShapedWord->IsClusterStart(offset);
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if (advanceAppUnits >= 0 &&
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gfxShapedWord::CompressedGlyph::IsSimpleAdvance(advanceAppUnits) &&
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gfxShapedWord::CompressedGlyph::IsSimpleGlyphID(glyph) &&
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atClusterStart)
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{
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aShapedWord->SetSimpleGlyph(offset,
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g.SetSimpleGlyph(advanceAppUnits, glyph));
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} else {
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gfxShapedWord::DetailedGlyph details;
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details.mGlyphID = glyph;
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details.mAdvance = advanceAppUnits;
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details.mXOffset = 0;
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details.mYOffset = 0;
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aShapedWord->SetGlyphs(offset,
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g.SetComplex(atClusterStart, true, 1),
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&details);
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}
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}
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return true;
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}
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