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comparison: gfx/thebes/gfxGDIShaper.cpp
gfx/thebes/gfxGDIShaper.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
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| -1:000000000000 | 0:c937c47165ca |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 //#define FORCE_PR_LOG | |
| 7 | |
| 8 #include "gfxGDIShaper.h" | |
| 9 | |
| 10 /********************************************************************** | |
| 11 * | |
| 12 * class gfxGDIShaper | |
| 13 * | |
| 14 **********************************************************************/ | |
| 15 | |
| 16 bool | |
| 17 gfxGDIShaper::ShapeText(gfxContext *aContext, | |
| 18 const char16_t *aText, | |
| 19 uint32_t aOffset, | |
| 20 uint32_t aLength, | |
| 21 int32_t aScript, | |
| 22 gfxShapedText *aShapedText) | |
| 23 { | |
| 24 DCFromContext dc(aContext); | |
| 25 AutoSelectFont selectFont(dc, static_cast<gfxGDIFont*>(mFont)->GetHFONT()); | |
| 26 | |
| 27 uint32_t length = aLength; | |
| 28 AutoFallibleTArray<WORD,500> glyphArray; | |
| 29 if (!glyphArray.SetLength(length)) { | |
| 30 return false; | |
| 31 } | |
| 32 WORD *glyphs = glyphArray.Elements(); | |
| 33 | |
| 34 DWORD ret = ::GetGlyphIndicesW(dc, char16ptr_t(aText), length, | |
| 35 glyphs, GGI_MARK_NONEXISTING_GLYPHS); | |
| 36 if (ret == GDI_ERROR) { | |
| 37 return false; | |
| 38 } | |
| 39 | |
| 40 for (int k = 0; k < length; k++) { | |
| 41 if (glyphs[k] == 0xFFFF) | |
| 42 return false; | |
| 43 } | |
| 44 | |
| 45 SIZE size; | |
| 46 AutoFallibleTArray<int,500> partialWidthArray; | |
| 47 if (!partialWidthArray.SetLength(length)) { | |
| 48 return false; | |
| 49 } | |
| 50 | |
| 51 BOOL success = ::GetTextExtentExPointI(dc, | |
| 52 glyphs, | |
| 53 length, | |
| 54 INT_MAX, | |
| 55 nullptr, | |
| 56 partialWidthArray.Elements(), | |
| 57 &size); | |
| 58 if (!success) { | |
| 59 return false; | |
| 60 } | |
| 61 | |
| 62 gfxTextRun::CompressedGlyph g; | |
| 63 gfxTextRun::CompressedGlyph *charGlyphs = | |
| 64 aShapedText->GetCharacterGlyphs(); | |
| 65 uint32_t i; | |
| 66 int32_t lastWidth = 0; | |
| 67 int32_t appUnitsPerDevPixel = aShapedText->GetAppUnitsPerDevUnit(); | |
| 68 for (i = 0; i < length; ++i) { | |
| 69 uint32_t offset = aOffset + i; | |
| 70 int32_t advancePixels = partialWidthArray[i] - lastWidth; | |
| 71 lastWidth = partialWidthArray[i]; | |
| 72 int32_t advanceAppUnits = advancePixels * appUnitsPerDevPixel; | |
| 73 WCHAR glyph = glyphs[i]; | |
| 74 NS_ASSERTION(!gfxFontGroup::IsInvalidChar(aText[i]), | |
| 75 "Invalid character detected!"); | |
| 76 bool atClusterStart = charGlyphs[offset].IsClusterStart(); | |
| 77 if (advanceAppUnits >= 0 && | |
| 78 gfxShapedWord::CompressedGlyph::IsSimpleAdvance(advanceAppUnits) && | |
| 79 gfxShapedWord::CompressedGlyph::IsSimpleGlyphID(glyph) && | |
| 80 atClusterStart) | |
| 81 { | |
| 82 charGlyphs[offset].SetSimpleGlyph(advanceAppUnits, glyph); | |
| 83 } else { | |
| 84 gfxShapedText::DetailedGlyph details; | |
| 85 details.mGlyphID = glyph; | |
| 86 details.mAdvance = advanceAppUnits; | |
| 87 details.mXOffset = 0; | |
| 88 details.mYOffset = 0; | |
| 89 aShapedText->SetGlyphs(offset, | |
| 90 g.SetComplex(atClusterStart, true, 1), | |
| 91 &details); | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 return true; | |
| 96 } |
