diff options
Diffstat (limited to 'gfx/thebes/gfxFT2Utils.cpp')
| -rw-r--r-- | gfx/thebes/gfxFT2Utils.cpp | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/gfx/thebes/gfxFT2Utils.cpp b/gfx/thebes/gfxFT2Utils.cpp index a544a8cb4..77e1c9632 100644 --- a/gfx/thebes/gfxFT2Utils.cpp +++ b/gfx/thebes/gfxFT2Utils.cpp @@ -10,6 +10,10 @@ #include FT_TRUETYPE_TABLES_H #include <algorithm> +#ifndef FT_FACE_FLAG_COLOR +#define FT_FACE_FLAG_COLOR ( 1L << 14 ) +#endif + #ifdef HAVE_FONTCONFIG_FCFREETYPE_H #include <fontconfig/fcfreetype.h> #endif @@ -53,7 +57,7 @@ gfxFT2LockedFace::GetMetrics(gfxFont::Metrics* aMetrics, if (MOZ_UNLIKELY(!mFace)) { // No face. This unfortunate situation might happen if the font // file is (re)moved at the wrong time. - const gfxFloat emHeight = mGfxFont->GetStyle()->size; + const gfxFloat emHeight = mGfxFont->GetAdjustedSize(); aMetrics->emHeight = emHeight; aMetrics->maxAscent = aMetrics->emAscent = 0.8 * emHeight; aMetrics->maxDescent = aMetrics->emDescent = 0.2 * emHeight; @@ -80,6 +84,11 @@ gfxFT2LockedFace::GetMetrics(gfxFont::Metrics* aMetrics, const FT_Size_Metrics& ftMetrics = mFace->size->metrics; + aMetrics->maxAscent = FLOAT_FROM_26_6(ftMetrics.ascender); + aMetrics->maxDescent = -FLOAT_FROM_26_6(ftMetrics.descender); + aMetrics->maxAdvance = FLOAT_FROM_26_6(ftMetrics.max_advance); + gfxFloat lineHeight = FLOAT_FROM_26_6(ftMetrics.height); + gfxFloat emHeight; // Scale for vertical design metric conversion: pixels per design unit. // If this remains at 0.0, we can't use metrics from OS/2 etc. @@ -103,6 +112,19 @@ gfxFT2LockedFace::GetMetrics(gfxFont::Metrics* aMetrics, const TT_Header* head = static_cast<TT_Header*>(FT_Get_Sfnt_Table(mFace, ft_sfnt_head)); if (head) { + // Even if the font is not explicitly scalable, if the face has + // color bitmaps, it should be treated as scalable and scaled to + // the desired size. Metrics based on y_ppem need to be rescaled + // for the adjusted size. This makes metrics agree with the + // scales we pass to Cairo for Fontconfig fonts. + if (mFace->face_flags & FT_FACE_FLAG_COLOR) { + emHeight = mGfxFont->GetAdjustedSize(); + gfxFloat adjustScale = emHeight / ftMetrics.y_ppem; + aMetrics->maxAscent *= adjustScale; + aMetrics->maxDescent *= adjustScale; + aMetrics->maxAdvance *= adjustScale; + lineHeight *= adjustScale; + } gfxFloat emUnit = head->Units_Per_EM; yScale = emHeight / emUnit; } @@ -111,11 +133,6 @@ gfxFT2LockedFace::GetMetrics(gfxFont::Metrics* aMetrics, TT_OS2 *os2 = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(mFace, ft_sfnt_os2)); - aMetrics->maxAscent = FLOAT_FROM_26_6(ftMetrics.ascender); - aMetrics->maxDescent = -FLOAT_FROM_26_6(ftMetrics.descender); - aMetrics->maxAdvance = FLOAT_FROM_26_6(ftMetrics.max_advance); - - gfxFloat lineHeight; if (os2 && os2->sTypoAscender && yScale > 0.0) { aMetrics->emAscent = os2->sTypoAscender * yScale; aMetrics->emDescent = -os2->sTypoDescender * yScale; @@ -142,7 +159,6 @@ gfxFT2LockedFace::GetMetrics(gfxFont::Metrics* aMetrics, } else { aMetrics->emAscent = aMetrics->maxAscent; aMetrics->emDescent = aMetrics->maxDescent; - lineHeight = FLOAT_FROM_26_6(ftMetrics.height); } cairo_text_extents_t extents; |