The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/thebes/gfxGDIShaper.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,96 @@
     1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
     1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +//#define FORCE_PR_LOG
    1.10 +
    1.11 +#include "gfxGDIShaper.h"
    1.12 +
    1.13 +/**********************************************************************
    1.14 + *
    1.15 + * class gfxGDIShaper
    1.16 + *
    1.17 + **********************************************************************/
    1.18 +
    1.19 +bool
    1.20 +gfxGDIShaper::ShapeText(gfxContext      *aContext,
    1.21 +                        const char16_t *aText,
    1.22 +                        uint32_t         aOffset,
    1.23 +                        uint32_t         aLength,
    1.24 +                        int32_t          aScript,
    1.25 +                        gfxShapedText   *aShapedText)
    1.26 +{
    1.27 +    DCFromContext dc(aContext);
    1.28 +    AutoSelectFont selectFont(dc, static_cast<gfxGDIFont*>(mFont)->GetHFONT());
    1.29 +
    1.30 +    uint32_t length = aLength;
    1.31 +    AutoFallibleTArray<WORD,500> glyphArray;
    1.32 +    if (!glyphArray.SetLength(length)) {
    1.33 +        return false;
    1.34 +    }
    1.35 +    WORD *glyphs = glyphArray.Elements();
    1.36 +
    1.37 +    DWORD ret = ::GetGlyphIndicesW(dc, char16ptr_t(aText), length,
    1.38 +                                   glyphs, GGI_MARK_NONEXISTING_GLYPHS);
    1.39 +    if (ret == GDI_ERROR) {
    1.40 +        return false;
    1.41 +    }
    1.42 +
    1.43 +    for (int k = 0; k < length; k++) {
    1.44 +        if (glyphs[k] == 0xFFFF)
    1.45 +            return false;
    1.46 +    }
    1.47 + 
    1.48 +    SIZE size;
    1.49 +    AutoFallibleTArray<int,500> partialWidthArray;
    1.50 +    if (!partialWidthArray.SetLength(length)) {
    1.51 +        return false;
    1.52 +    }
    1.53 +
    1.54 +    BOOL success = ::GetTextExtentExPointI(dc,
    1.55 +                                           glyphs,
    1.56 +                                           length,
    1.57 +                                           INT_MAX,
    1.58 +                                           nullptr,
    1.59 +                                           partialWidthArray.Elements(),
    1.60 +                                           &size);
    1.61 +    if (!success) {
    1.62 +        return false;
    1.63 +    }
    1.64 +
    1.65 +    gfxTextRun::CompressedGlyph g;
    1.66 +    gfxTextRun::CompressedGlyph *charGlyphs =
    1.67 +        aShapedText->GetCharacterGlyphs();
    1.68 +    uint32_t i;
    1.69 +    int32_t lastWidth = 0;
    1.70 +    int32_t appUnitsPerDevPixel = aShapedText->GetAppUnitsPerDevUnit();
    1.71 +    for (i = 0; i < length; ++i) {
    1.72 +        uint32_t offset = aOffset + i;
    1.73 +        int32_t advancePixels = partialWidthArray[i] - lastWidth;
    1.74 +        lastWidth = partialWidthArray[i];
    1.75 +        int32_t advanceAppUnits = advancePixels * appUnitsPerDevPixel;
    1.76 +        WCHAR glyph = glyphs[i];
    1.77 +        NS_ASSERTION(!gfxFontGroup::IsInvalidChar(aText[i]),
    1.78 +                     "Invalid character detected!");
    1.79 +        bool atClusterStart = charGlyphs[offset].IsClusterStart();
    1.80 +        if (advanceAppUnits >= 0 &&
    1.81 +            gfxShapedWord::CompressedGlyph::IsSimpleAdvance(advanceAppUnits) &&
    1.82 +            gfxShapedWord::CompressedGlyph::IsSimpleGlyphID(glyph) &&
    1.83 +            atClusterStart)
    1.84 +        {
    1.85 +            charGlyphs[offset].SetSimpleGlyph(advanceAppUnits, glyph);
    1.86 +        } else {
    1.87 +            gfxShapedText::DetailedGlyph details;
    1.88 +            details.mGlyphID = glyph;
    1.89 +            details.mAdvance = advanceAppUnits;
    1.90 +            details.mXOffset = 0;
    1.91 +            details.mYOffset = 0;
    1.92 +            aShapedText->SetGlyphs(offset,
    1.93 +                                   g.SetComplex(atClusterStart, true, 1),
    1.94 +                                   &details);
    1.95 +        }
    1.96 +    }
    1.97 +
    1.98 +    return true;
    1.99 +}