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authorNicolas Pena <npm@chromium.org>2017-04-12 15:05:15 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-04-12 19:52:00 +0000
commit27a0f350ff26ba752eb17a593bbaad17fbbe71d2 (patch)
tree48996b61ff35c5621b7658e8e73a655f6dc8c010 /core/fpdfapi/render
parent94c34c9934bf93fc68d0ab0bb0c6696ce71b6441 (diff)
downloadpdfium-27a0f350ff26ba752eb17a593bbaad17fbbe71d2.tar.xz
Some fixes to the fallback font code.
This CL applies several fixes to the fallback font code. - PDFium uses -1 to indicate that no glyph index was found, but freetype uses 0. In CPDF_TrueTypeFont, an index of 0 indicates a freetype failure, which means we should try to find the glyph from a fallback font. - Improve the fallback glyph calculation by going from original font charcode to unicode to fallback font charcode. - Consider the m_ExtGID on Mac when deciding the fallback. Bug: chromium:665467 Change-Id: I2be34983e0d768d9a598043f84edd2d70f033c86 Reviewed-on: https://pdfium-review.googlesource.com/4055 Commit-Queue: Nicolás Peña <npm@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
Diffstat (limited to 'core/fpdfapi/render')
-rw-r--r--core/fpdfapi/render/cpdf_charposlist.cpp14
1 files changed, 9 insertions, 5 deletions
diff --git a/core/fpdfapi/render/cpdf_charposlist.cpp b/core/fpdfapi/render/cpdf_charposlist.cpp
index 6d4540e163..d4c6b3b5f9 100644
--- a/core/fpdfapi/render/cpdf_charposlist.cpp
+++ b/core/fpdfapi/render/cpdf_charposlist.cpp
@@ -39,19 +39,23 @@ void CPDF_CharPosList::Load(const std::vector<uint32_t>& charCodes,
charpos.m_bFontStyle = true;
charpos.m_GlyphIndex = pFont->GlyphFromCharCode(CharCode, &bVert);
- if (charpos.m_GlyphIndex != static_cast<uint32_t>(-1)) {
+ uint32_t GlyphID = charpos.m_GlyphIndex;
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+ charpos.m_ExtGID = pFont->GlyphFromCharCodeExt(CharCode);
+ GlyphID = charpos.m_ExtGID;
+#endif
+ if (GlyphID != static_cast<uint32_t>(-1)) {
charpos.m_FallbackFontPosition = -1;
} else {
charpos.m_FallbackFontPosition =
pFont->FallbackFontFromCharcode(CharCode);
charpos.m_GlyphIndex = pFont->FallbackGlyphFromCharcode(
charpos.m_FallbackFontPosition, CharCode);
- }
-
-// TODO(npm): Figure out how this affects m_ExtGID
#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
- charpos.m_ExtGID = pFont->GlyphFromCharCodeExt(CharCode);
+ charpos.m_ExtGID = charpos.m_GlyphIndex;
#endif
+ }
+
if (!pFont->IsEmbedded() && !pFont->IsCIDFont())
charpos.m_FontCharWidth = pFont->GetCharWidthF(CharCode);
else