diff options
Diffstat (limited to 'src/gui/text/qfontengine_ft.cpp')
| -rw-r--r-- | src/gui/text/qfontengine_ft.cpp | 173 |
1 files changed, 91 insertions, 82 deletions
diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp index f5e9e1c..db0156a 100644 --- a/src/gui/text/qfontengine_ft.cpp +++ b/src/gui/text/qfontengine_ft.cpp @@ -174,9 +174,7 @@ int QFreetypeFace::fsType() const HB_Error QFreetypeFace::getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints) { - int load_flags = (flags & HB_ShaperFlag_UseDesignMetrics) ? FT_LOAD_NO_HINTING : FT_LOAD_DEFAULT; - - if (HB_Error error = (HB_Error)FT_Load_Glyph(face, glyph, load_flags)) + if (HB_Error error = (HB_Error)FT_Load_Glyph(face, glyph, flags)) return error; if (face->glyph->format != FT_GLYPH_FORMAT_OUTLINE) @@ -760,12 +758,9 @@ void QFontEngineFT::setDefaultHintStyle(HintStyle style) default_hint_style = style; } -QFontEngineFT::Glyph *QFontEngineFT::loadGlyphMetrics(QGlyphSet *set, uint glyph, GlyphFormat format) const +int QFontEngineFT::loadFlags(QGlyphSet *set, GlyphFormat format, int flags, + bool &hsubpixel, int &vfactor) const { - Glyph *g = set->getGlyph(glyph); - if (g && g->format == format) - return g; - int load_flags = FT_LOAD_DEFAULT | default_load_flags; int load_target = default_hint_style == HintLight ? FT_LOAD_TARGET_LIGHT @@ -777,20 +772,35 @@ QFontEngineFT::Glyph *QFontEngineFT::loadGlyphMetrics(QGlyphSet *set, uint glyph if (subpixelType == QFontEngineFT::Subpixel_RGB || subpixelType == QFontEngineFT::Subpixel_BGR) { if (default_hint_style == HintFull) load_target = FT_LOAD_TARGET_LCD; + hsubpixel = true; } else if (subpixelType == QFontEngineFT::Subpixel_VRGB || subpixelType == QFontEngineFT::Subpixel_VBGR) { if (default_hint_style == HintFull) load_target = FT_LOAD_TARGET_LCD_V; + vfactor = 3; } } - if (set->outline_drawing) + if (set && set->outline_drawing) load_flags = FT_LOAD_NO_BITMAP; - if (default_hint_style == HintNone) + if (default_hint_style == HintNone || (flags & HB_ShaperFlag_UseDesignMetrics)) load_flags |= FT_LOAD_NO_HINTING; else load_flags |= load_target; + return load_flags; +} + +QFontEngineFT::Glyph *QFontEngineFT::loadGlyphMetrics(QGlyphSet *set, uint glyph, GlyphFormat format) const +{ + Glyph *g = set->getGlyph(glyph); + if (g && g->format == format) + return g; + + bool hsubpixel = false; + int vfactor = 1; + int load_flags = loadFlags(set, format, 0, hsubpixel, vfactor); + // apply our matrix to this, but note that the metrics will not be affected by this. FT_Face face = lockFace(); FT_Matrix matrix = this->matrix; @@ -881,7 +891,10 @@ QFontEngineFT::Glyph *QFontEngineFT::loadGlyphMetrics(QGlyphSet *set, uint glyph return g; } -QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, GlyphFormat format, bool fetchMetricsOnly) const +QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, + QFixed subPixelPosition, + GlyphFormat format, + bool fetchMetricsOnly) const { // Q_ASSERT(freetype->lock == 1); @@ -896,10 +909,10 @@ QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, Glyph } } - Glyph *g = set->getGlyph(glyph); + Glyph *g = set->getGlyph(glyph, subPixelPosition); if (g && g->format == format) { if (uploadToServer && !g->uploadedToServer) { - set->setGlyph(glyph, 0); + set->setGlyph(glyph, subPixelPosition, 0); delete g; g = 0; } else { @@ -912,33 +925,7 @@ QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, Glyph Q_ASSERT(format != Format_None); bool hsubpixel = false; int vfactor = 1; - int load_flags = FT_LOAD_DEFAULT | default_load_flags; - - int load_target = default_hint_style == HintLight - ? FT_LOAD_TARGET_LIGHT - : FT_LOAD_TARGET_NORMAL; - - if (set->outline_drawing) - load_flags |= FT_LOAD_NO_BITMAP; - - if (format == Format_Mono) { - load_target = FT_LOAD_TARGET_MONO; - } else if (format == Format_A32) { - if (subpixelType == QFontEngineFT::Subpixel_RGB || subpixelType == QFontEngineFT::Subpixel_BGR) { - if (default_hint_style == HintFull) - load_target = FT_LOAD_TARGET_LCD; - hsubpixel = true; - } else if (subpixelType == QFontEngineFT::Subpixel_VRGB || subpixelType == QFontEngineFT::Subpixel_VBGR) { - if (default_hint_style == HintFull) - load_target = FT_LOAD_TARGET_LCD_V; - vfactor = 3; - } - } - - if (default_hint_style == HintNone) - load_flags |= FT_LOAD_NO_HINTING; - else - load_flags |= load_target; + int load_flags = loadFlags(set, format, 0, hsubpixel, vfactor); #ifndef Q_WS_QWS if (format != Format_Mono && !embeddedbitmap) @@ -955,6 +942,12 @@ QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, Glyph load_flags |= FT_LOAD_NO_BITMAP; FT_Face face = freetype->face; + + FT_Vector v; + v.x = format == Format_Mono ? 0 : FT_Pos(subPixelPosition.toReal() * 64); + v.y = 0; + FT_Set_Transform(face, &freetype->matrix, &v); + FT_Error err = FT_Load_Glyph(face, glyph, load_flags); if (err && (load_flags & FT_LOAD_NO_BITMAP)) { load_flags &= ~FT_LOAD_NO_BITMAP; @@ -1055,6 +1048,10 @@ QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, Glyph top = CEIL(top); int hpixels = TRUNC(right - left); + // subpixel position requires one more pixel + if (subPixelPosition > 0 && format != Format_Mono) + hpixels++; + if (hsubpixel) hpixels = hpixels*3 + 8; info.width = hpixels; @@ -1197,7 +1194,7 @@ QFontEngineFT::Glyph *QFontEngineFT::loadGlyph(QGlyphSet *set, uint glyph, Glyph uploadGlyphToServer(set, glyph, g, &info, glyph_buffer_size); } - set->setGlyph(glyph, g); + set->setGlyph(glyph, subPixelPosition, g); return g; } @@ -1430,12 +1427,28 @@ QFontEngineFT::QGlyphSet *QFontEngineFT::loadTransformedGlyphSet(const QTransfor return gs; } -bool QFontEngineFT::loadGlyphs(QGlyphSet *gs, glyph_t *glyphs, int num_glyphs, GlyphFormat format) +QFixed QFontEngineFT::subPixelPositionForX(QFixed x) +{ + int m_subPixelPositionCount = 4; + + QFixed subPixelPosition; + if (x != 0) { + subPixelPosition = x - x.floor(); + QFixed fraction = (subPixelPosition / QFixed::fromReal(1.0 / m_subPixelPositionCount)).floor(); + subPixelPosition = fraction / QFixed(m_subPixelPositionCount); + } + return subPixelPosition; +} + +bool QFontEngineFT::loadGlyphs(QGlyphSet *gs, const glyph_t *glyphs, int num_glyphs, + const QFixedPoint *positions, + GlyphFormat format) { FT_Face face = 0; for (int i = 0; i < num_glyphs; ++i) { - Glyph *glyph = gs->getGlyph(glyphs[i]); + QFixed spp = subPixelPositionForX(positions[i].x); + Glyph *glyph = gs->getGlyph(glyphs[i], spp); if (glyph == 0 || glyph->format != format) { if (!face) { face = lockFace(); @@ -1444,7 +1457,7 @@ bool QFontEngineFT::loadGlyphs(QGlyphSet *gs, glyph_t *glyphs, int num_glyphs, G FT_Set_Transform(face, &m, 0); freetype->matrix = m; } - if (!loadGlyph(gs, glyphs[i], format)) { + if (!loadGlyph(gs, glyphs[i], spp, format)) { unlockFace(); return false; } @@ -1668,32 +1681,23 @@ bool QFontEngineFT::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs void QFontEngineFT::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const { FT_Face face = 0; - if (flags & QTextEngine::DesignMetrics) { - for (int i = 0; i < glyphs->numGlyphs; i++) { - Glyph *g = defaultGlyphSet.getGlyph(glyphs->glyphs[i]); - if (g) { - glyphs->advances_x[i] = QFixed::fromFixed(g->linearAdvance); - } else { - if (!face) - face = lockFace(); - g = loadGlyph(glyphs->glyphs[i], Format_None, true); - glyphs->advances_x[i] = QFixed::fromFixed(face->glyph->linearHoriAdvance >> 10); - } - glyphs->advances_y[i] = 0; - } - } else { - for (int i = 0; i < glyphs->numGlyphs; i++) { - Glyph *g = defaultGlyphSet.getGlyph(glyphs->glyphs[i]); - if (g) { - glyphs->advances_x[i] = QFixed(g->advance); - } else { - if (!face) - face = lockFace(); - g = loadGlyph(glyphs->glyphs[i], Format_None, true); - glyphs->advances_x[i] = QFixed::fromFixed(face->glyph->metrics.horiAdvance).round(); - } - glyphs->advances_y[i] = 0; + bool design = (default_hint_style == HintNone || + default_hint_style == HintLight || + (flags & HB_ShaperFlag_UseDesignMetrics)); + for (int i = 0; i < glyphs->numGlyphs; i++) { + Glyph *g = defaultGlyphSet.getGlyph(glyphs->glyphs[i]); + if (g) { + glyphs->advances_x[i] = design ? QFixed::fromFixed(g->linearAdvance) : QFixed(g->advance); + } else { + if (!face) + face = lockFace(); + g = loadGlyph(glyphs->glyphs[i], 0, Format_None, true); + glyphs->advances_x[i] = design ? QFixed::fromFixed(face->glyph->linearHoriAdvance >> 10) + : QFixed::fromFixed(face->glyph->metrics.horiAdvance).round(); } + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + glyphs->advances_x[i] = glyphs->advances_x[i].round(); + glyphs->advances_y[i] = 0; } if (face) unlockFace(); @@ -1716,7 +1720,7 @@ glyph_metrics_t QFontEngineFT::boundingBox(const QGlyphLayout &glyphs) if (!g) { if (!face) face = lockFace(); - g = loadGlyph(glyphs.glyphs[i], Format_None, true); + g = loadGlyph(glyphs.glyphs[i], 0, Format_None, true); } if (g) { QFixed x = overall.xoff + glyphs.offsets[i].x + g->x; @@ -1757,7 +1761,7 @@ glyph_metrics_t QFontEngineFT::boundingBox(glyph_t glyph) Glyph *g = defaultGlyphSet.getGlyph(glyph); if (!g) { face = lockFace(); - g = loadGlyph(glyph, Format_None, true); + g = loadGlyph(glyph, 0, Format_None, true); } if (g) { overall.x = g->x; @@ -1765,6 +1769,8 @@ glyph_metrics_t QFontEngineFT::boundingBox(glyph_t glyph) overall.width = g->width; overall.height = g->height; overall.xoff = g->advance; + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + overall.xoff = overall.xoff.round(); } else { int left = FLOOR(face->glyph->metrics.horiBearingX); int right = CEIL(face->glyph->metrics.horiBearingX + face->glyph->metrics.width); @@ -1860,13 +1866,13 @@ glyph_metrics_t QFontEngineFT::alphaMapBoundingBox(glyph_t glyph, const QTransfo return overall; } -QImage QFontEngineFT::alphaMapForGlyph(glyph_t g) +QImage QFontEngineFT::alphaMapForGlyph(glyph_t g, QFixed subPixelPosition) { lockFace(); GlyphFormat glyph_format = antialias ? Format_A8 : Format_Mono; - Glyph *glyph = defaultGlyphSet.outline_drawing ? 0 : loadGlyph(g, glyph_format); + Glyph *glyph = defaultGlyphSet.outline_drawing ? 0 : loadGlyph(g, subPixelPosition, glyph_format); if (!glyph) { unlockFace(); return QFontEngine::alphaMapForGlyph(g); @@ -1905,7 +1911,7 @@ QImage QFontEngineFT::alphaRGBMapForGlyph(glyph_t g, QFixed subPixelPosition, in GlyphFormat glyph_format = Format_A32; - Glyph *glyph = defaultGlyphSet.outline_drawing ? 0 : loadGlyph(g, glyph_format); + Glyph *glyph = defaultGlyphSet.outline_drawing ? 0 : loadGlyph(g, subPixelPosition, glyph_format); if (!glyph) { unlockFace(); return QFontEngine::alphaRGBMapForGlyph(g, subPixelPosition, margin, t); @@ -1920,7 +1926,7 @@ QImage QFontEngineFT::alphaRGBMapForGlyph(glyph_t g, QFixed subPixelPosition, in void QFontEngineFT::removeGlyphFromCache(glyph_t glyph) { - defaultGlyphSet.removeGlyphFromCache(glyph); + defaultGlyphSet.removeGlyphFromCache(glyph, 0); } int QFontEngineFT::glyphCount() const @@ -2000,9 +2006,9 @@ void QFontEngineFT::QGlyphSet::clear() glyph_data.clear(); } -void QFontEngineFT::QGlyphSet::removeGlyphFromCache(int index) +void QFontEngineFT::QGlyphSet::removeGlyphFromCache(glyph_t index, QFixed subPixelPosition) { - if (index < 256) { + if (useFastGlyphData(index, subPixelPosition)) { if (fast_glyph_data[index]) { delete fast_glyph_data[index]; fast_glyph_data[index] = 0; @@ -2010,18 +2016,18 @@ void QFontEngineFT::QGlyphSet::removeGlyphFromCache(int index) --fast_glyph_count; } } else { - delete glyph_data.take(index); + delete glyph_data.take(GlyphAndSubPixelPosition(index, subPixelPosition)); } } -void QFontEngineFT::QGlyphSet::setGlyph(int index, Glyph *glyph) +void QFontEngineFT::QGlyphSet::setGlyph(glyph_t index, QFixed subPixelPosition, Glyph *glyph) { - if (index < 256) { + if (useFastGlyphData(index, subPixelPosition)) { if (!fast_glyph_data[index]) ++fast_glyph_count; fast_glyph_data[index] = glyph; } else { - glyph_data.insert(index, glyph); + glyph_data.insert(GlyphAndSubPixelPosition(index, subPixelPosition), glyph); } } @@ -2038,7 +2044,10 @@ void QFontEngineFT::freeServerGlyphSet(unsigned long id) HB_Error QFontEngineFT::getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints) { lockFace(); - HB_Error result = freetype->getPointInOutline(glyph, flags, point, xpos, ypos, nPoints); + bool hsubpixel = true; + int vfactor = 1; + int load_flags = loadFlags(0, Format_A8, flags, hsubpixel, vfactor); + HB_Error result = freetype->getPointInOutline(glyph, load_flags, point, xpos, ypos, nPoints); unlockFace(); return result; } |