diff options
Diffstat (limited to 'gfx/graphite2/src/Slot.cpp')
| -rw-r--r-- | gfx/graphite2/src/Slot.cpp | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/gfx/graphite2/src/Slot.cpp b/gfx/graphite2/src/Slot.cpp new file mode 100644 index 0000000000..0fdb098952 --- /dev/null +++ b/gfx/graphite2/src/Slot.cpp @@ -0,0 +1,529 @@ +/* GRAPHITE2 LICENSING + + Copyright 2010, SIL International + All rights reserved. + + This library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should also have received a copy of the GNU Lesser General Public + License along with this library in the file named "LICENSE". + If not, write to the Free Software Foundation, 51 Franklin Street, + Suite 500, Boston, MA 02110-1335, USA or visit their web page on the + internet at http://www.fsf.org/licenses/lgpl.html. + +Alternatively, the contents of this file may be used under the terms of the +Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public +License, as published by the Free Software Foundation, either version 2 +of the License or (at your option) any later version. +*/ +#include "inc/Segment.h" +#include "inc/Slot.h" +#include "inc/Silf.h" +#include "inc/CharInfo.h" +#include "inc/Rule.h" +#include "inc/Collider.h" + + +using namespace graphite2; + +Slot::Slot(int16 *user_attrs) : + m_next(NULL), m_prev(NULL), + m_glyphid(0), m_realglyphid(0), m_original(0), m_before(0), m_after(0), + m_index(0), m_parent(NULL), m_child(NULL), m_sibling(NULL), + m_position(0, 0), m_shift(0, 0), m_advance(0, 0), + m_attach(0, 0), m_with(0, 0), m_just(0.), + m_flags(0), m_attLevel(0), m_bidiCls(-1), m_bidiLevel(0), + m_userAttr(user_attrs), m_justs(NULL) +{ +} + +// take care, this does not copy any of the GrSlot pointer fields +void Slot::set(const Slot & orig, int charOffset, size_t sizeAttr, size_t justLevels, size_t numChars) +{ + // leave m_next and m_prev unchanged + m_glyphid = orig.m_glyphid; + m_realglyphid = orig.m_realglyphid; + m_original = orig.m_original + charOffset; + if (charOffset + int(orig.m_before) < 0) + m_before = 0; + else + m_before = orig.m_before + charOffset; + if (charOffset <= 0 && orig.m_after + charOffset >= numChars) + m_after = int(numChars) - 1; + else + m_after = orig.m_after + charOffset; + m_parent = NULL; + m_child = NULL; + m_sibling = NULL; + m_position = orig.m_position; + m_shift = orig.m_shift; + m_advance = orig.m_advance; + m_attach = orig.m_attach; + m_with = orig.m_with; + m_flags = orig.m_flags; + m_attLevel = orig.m_attLevel; + m_bidiCls = orig.m_bidiCls; + m_bidiLevel = orig.m_bidiLevel; + if (m_userAttr && orig.m_userAttr) + memcpy(m_userAttr, orig.m_userAttr, sizeAttr * sizeof(*m_userAttr)); + if (m_justs && orig.m_justs) + memcpy(m_justs, orig.m_justs, SlotJustify::size_of(justLevels)); +} + +void Slot::update(int /*numGrSlots*/, int numCharInfo, Position &relpos) +{ + m_before += numCharInfo; + m_after += numCharInfo; + m_position = m_position + relpos; +} + +Position Slot::finalise(const Segment *seg, const Font *font, Position & base, Rect & bbox, uint8 attrLevel, float & clusterMin, bool rtl, bool isFinal, int depth) +{ + SlotCollision *coll = NULL; + if (depth > 100 || (attrLevel && m_attLevel > attrLevel)) return Position(0, 0); + float scale = font ? font->scale() : 1.0f; + Position shift(m_shift.x * (rtl * -2 + 1) + m_just, m_shift.y); + float tAdvance = m_advance.x + m_just; + if (isFinal && (coll = seg->collisionInfo(this))) + { + const Position &collshift = coll->offset(); + if (!(coll->flags() & SlotCollision::COLL_KERN) || rtl) + shift = shift + collshift; + } + const GlyphFace * glyphFace = seg->getFace()->glyphs().glyphSafe(glyph()); + if (font) + { + scale = font->scale(); + shift *= scale; + if (font->isHinted() && glyphFace) + tAdvance = (m_advance.x - glyphFace->theAdvance().x + m_just) * scale + font->advance(glyph()); + else + tAdvance *= scale; + } + Position res; + + m_position = base + shift; + if (!m_parent) + { + res = base + Position(tAdvance, m_advance.y * scale); + clusterMin = m_position.x; + } + else + { + float tAdv; + m_position += (m_attach - m_with) * scale; + tAdv = m_advance.x >= 0.5f ? m_position.x + tAdvance - shift.x : 0.f; + res = Position(tAdv, 0); + if ((m_advance.x >= 0.5f || m_position.x < 0) && m_position.x < clusterMin) clusterMin = m_position.x; + } + + if (glyphFace) + { + Rect ourBbox = glyphFace->theBBox() * scale + m_position; + bbox = bbox.widen(ourBbox); + } + + if (m_child && m_child != this && m_child->attachedTo() == this) + { + Position tRes = m_child->finalise(seg, font, m_position, bbox, attrLevel, clusterMin, rtl, isFinal, depth + 1); + if ((!m_parent || m_advance.x >= 0.5f) && tRes.x > res.x) res = tRes; + } + + if (m_parent && m_sibling && m_sibling != this && m_sibling->attachedTo() == m_parent) + { + Position tRes = m_sibling->finalise(seg, font, base, bbox, attrLevel, clusterMin, rtl, isFinal, depth + 1); + if (tRes.x > res.x) res = tRes; + } + + if (!m_parent && clusterMin < base.x) + { + Position adj = Position(m_position.x - clusterMin, 0.); + res += adj; + m_position += adj; + if (m_child) m_child->floodShift(adj); + } + return res; +} + +int32 Slot::clusterMetric(const Segment *seg, uint8 metric, uint8 attrLevel, bool rtl) +{ + Position base; + if (glyph() >= seg->getFace()->glyphs().numGlyphs()) + return 0; + Rect bbox = seg->theGlyphBBoxTemporary(glyph()); + float clusterMin = 0.; + Position res = finalise(seg, NULL, base, bbox, attrLevel, clusterMin, rtl, false); + + switch (metrics(metric)) + { + case kgmetLsb : + return int32(bbox.bl.x); + case kgmetRsb : + return int32(res.x - bbox.tr.x); + case kgmetBbTop : + return int32(bbox.tr.y); + case kgmetBbBottom : + return int32(bbox.bl.y); + case kgmetBbLeft : + return int32(bbox.bl.x); + case kgmetBbRight : + return int32(bbox.tr.x); + case kgmetBbWidth : + return int32(bbox.tr.x - bbox.bl.x); + case kgmetBbHeight : + return int32(bbox.tr.y - bbox.bl.y); + case kgmetAdvWidth : + return int32(res.x); + case kgmetAdvHeight : + return int32(res.y); + default : + return 0; + } +} + +#define SLOTGETCOLATTR(x) { SlotCollision *c = seg->collisionInfo(this); return c ? int(c-> x) : 0; } + +int Slot::getAttr(const Segment *seg, attrCode ind, uint8 subindex) const +{ + if (ind >= gr_slatJStretch && ind < gr_slatJStretch + 20 && ind != gr_slatJWidth) + { + int indx = ind - gr_slatJStretch; + return getJustify(seg, indx / 5, indx % 5); + } + + switch (ind) + { + case gr_slatAdvX : return int(m_advance.x); + case gr_slatAdvY : return int(m_advance.y); + case gr_slatAttTo : return m_parent ? 1 : 0; + case gr_slatAttX : return int(m_attach.x); + case gr_slatAttY : return int(m_attach.y); + case gr_slatAttXOff : + case gr_slatAttYOff : return 0; + case gr_slatAttWithX : return int(m_with.x); + case gr_slatAttWithY : return int(m_with.y); + case gr_slatAttWithXOff: + case gr_slatAttWithYOff:return 0; + case gr_slatAttLevel : return m_attLevel; + case gr_slatBreak : return seg->charinfo(m_original)->breakWeight(); + case gr_slatCompRef : return 0; + case gr_slatDir : return seg->dir() & 1; + case gr_slatInsert : return isInsertBefore(); + case gr_slatPosX : return int(m_position.x); // but need to calculate it + case gr_slatPosY : return int(m_position.y); + case gr_slatShiftX : return int(m_shift.x); + case gr_slatShiftY : return int(m_shift.y); + case gr_slatMeasureSol: return -1; // err what's this? + case gr_slatMeasureEol: return -1; + case gr_slatJWidth: return int(m_just); + case gr_slatUserDefnV1: subindex = 0; GR_FALLTHROUGH; + // no break + case gr_slatUserDefn : return subindex < seg->numAttrs() ? m_userAttr[subindex] : 0; + case gr_slatSegSplit : return seg->charinfo(m_original)->flags() & 3; + case gr_slatBidiLevel: return m_bidiLevel; + case gr_slatColFlags : { SlotCollision *c = seg->collisionInfo(this); return c ? c->flags() : 0; } + case gr_slatColLimitblx:SLOTGETCOLATTR(limit().bl.x) + case gr_slatColLimitbly:SLOTGETCOLATTR(limit().bl.y) + case gr_slatColLimittrx:SLOTGETCOLATTR(limit().tr.x) + case gr_slatColLimittry:SLOTGETCOLATTR(limit().tr.y) + case gr_slatColShiftx : SLOTGETCOLATTR(offset().x) + case gr_slatColShifty : SLOTGETCOLATTR(offset().y) + case gr_slatColMargin : SLOTGETCOLATTR(margin()) + case gr_slatColMarginWt:SLOTGETCOLATTR(marginWt()) + case gr_slatColExclGlyph:SLOTGETCOLATTR(exclGlyph()) + case gr_slatColExclOffx:SLOTGETCOLATTR(exclOffset().x) + case gr_slatColExclOffy:SLOTGETCOLATTR(exclOffset().y) + case gr_slatSeqClass : SLOTGETCOLATTR(seqClass()) + case gr_slatSeqProxClass:SLOTGETCOLATTR(seqProxClass()) + case gr_slatSeqOrder : SLOTGETCOLATTR(seqOrder()) + case gr_slatSeqAboveXoff:SLOTGETCOLATTR(seqAboveXoff()) + case gr_slatSeqAboveWt: SLOTGETCOLATTR(seqAboveWt()) + case gr_slatSeqBelowXlim:SLOTGETCOLATTR(seqBelowXlim()) + case gr_slatSeqBelowWt: SLOTGETCOLATTR(seqBelowWt()) + case gr_slatSeqValignHt:SLOTGETCOLATTR(seqValignHt()) + case gr_slatSeqValignWt:SLOTGETCOLATTR(seqValignWt()) + default : return 0; + } +} + +#define SLOTCOLSETATTR(x) { \ + SlotCollision *c = seg->collisionInfo(this); \ + if (c) { c-> x ; c->setFlags(c->flags() & ~SlotCollision::COLL_KNOWN); } \ + break; } +#define SLOTCOLSETCOMPLEXATTR(t, y, x) { \ + SlotCollision *c = seg->collisionInfo(this); \ + if (c) { \ + const t &s = c-> y; \ + c-> x ; c->setFlags(c->flags() & ~SlotCollision::COLL_KNOWN); } \ + break; } + +void Slot::setAttr(Segment *seg, attrCode ind, uint8 subindex, int16 value, const SlotMap & map) +{ + if (ind == gr_slatUserDefnV1) + { + ind = gr_slatUserDefn; + subindex = 0; + if (seg->numAttrs() == 0) + return; + } + else if (ind >= gr_slatJStretch && ind < gr_slatJStretch + 20 && ind != gr_slatJWidth) + { + int indx = ind - gr_slatJStretch; + return setJustify(seg, indx / 5, indx % 5, value); + } + + switch (ind) + { + case gr_slatAdvX : m_advance.x = value; break; + case gr_slatAdvY : m_advance.y = value; break; + case gr_slatAttTo : + { + const uint16 idx = uint16(value); + if (idx < map.size() && map[idx]) + { + Slot *other = map[idx]; + if (other == this || other == m_parent || other->isCopied()) break; + if (m_parent) { m_parent->removeChild(this); attachTo(NULL); } + Slot *pOther = other; + int count = 0; + bool foundOther = false; + while (pOther) + { + ++count; + if (pOther == this) foundOther = true; + pOther = pOther->attachedTo(); + } + for (pOther = m_child; pOther; pOther = pOther->m_child) + ++count; + for (pOther = m_sibling; pOther; pOther = pOther->m_sibling) + ++count; + if (count < 100 && !foundOther && other->child(this)) + { + attachTo(other); + if ((map.dir() != 0) ^ (idx > subindex)) + m_with = Position(advance(), 0); + else // normal match to previous root + m_attach = Position(other->advance(), 0); + } + } + break; + } + case gr_slatAttX : m_attach.x = value; break; + case gr_slatAttY : m_attach.y = value; break; + case gr_slatAttXOff : + case gr_slatAttYOff : break; + case gr_slatAttWithX : m_with.x = value; break; + case gr_slatAttWithY : m_with.y = value; break; + case gr_slatAttWithXOff : + case gr_slatAttWithYOff : break; + case gr_slatAttLevel : + m_attLevel = byte(value); + break; + case gr_slatBreak : + seg->charinfo(m_original)->breakWeight(value); + break; + case gr_slatCompRef : break; // not sure what to do here + case gr_slatDir : break; + case gr_slatInsert : + markInsertBefore(value? true : false); + break; + case gr_slatPosX : break; // can't set these here + case gr_slatPosY : break; + case gr_slatShiftX : m_shift.x = value; break; + case gr_slatShiftY : m_shift.y = value; break; + case gr_slatMeasureSol : break; + case gr_slatMeasureEol : break; + case gr_slatJWidth : just(value); break; + case gr_slatSegSplit : seg->charinfo(m_original)->addflags(value & 3); break; + case gr_slatUserDefn : m_userAttr[subindex] = value; break; + case gr_slatColFlags : { + SlotCollision *c = seg->collisionInfo(this); + if (c) + c->setFlags(value); + break; } + case gr_slatColLimitblx : SLOTCOLSETCOMPLEXATTR(Rect, limit(), setLimit(Rect(Position(value, s.bl.y), s.tr))) + case gr_slatColLimitbly : SLOTCOLSETCOMPLEXATTR(Rect, limit(), setLimit(Rect(Position(s.bl.x, value), s.tr))) + case gr_slatColLimittrx : SLOTCOLSETCOMPLEXATTR(Rect, limit(), setLimit(Rect(s.bl, Position(value, s.tr.y)))) + case gr_slatColLimittry : SLOTCOLSETCOMPLEXATTR(Rect, limit(), setLimit(Rect(s.bl, Position(s.tr.x, value)))) + case gr_slatColMargin : SLOTCOLSETATTR(setMargin(value)) + case gr_slatColMarginWt : SLOTCOLSETATTR(setMarginWt(value)) + case gr_slatColExclGlyph : SLOTCOLSETATTR(setExclGlyph(value)) + case gr_slatColExclOffx : SLOTCOLSETCOMPLEXATTR(Position, exclOffset(), setExclOffset(Position(value, s.y))) + case gr_slatColExclOffy : SLOTCOLSETCOMPLEXATTR(Position, exclOffset(), setExclOffset(Position(s.x, value))) + case gr_slatSeqClass : SLOTCOLSETATTR(setSeqClass(value)) + case gr_slatSeqProxClass : SLOTCOLSETATTR(setSeqProxClass(value)) + case gr_slatSeqOrder : SLOTCOLSETATTR(setSeqOrder(value)) + case gr_slatSeqAboveXoff : SLOTCOLSETATTR(setSeqAboveXoff(value)) + case gr_slatSeqAboveWt : SLOTCOLSETATTR(setSeqAboveWt(value)) + case gr_slatSeqBelowXlim : SLOTCOLSETATTR(setSeqBelowXlim(value)) + case gr_slatSeqBelowWt : SLOTCOLSETATTR(setSeqBelowWt(value)) + case gr_slatSeqValignHt : SLOTCOLSETATTR(setSeqValignHt(value)) + case gr_slatSeqValignWt : SLOTCOLSETATTR(setSeqValignWt(value)) + default : + break; + } +} + +int Slot::getJustify(const Segment *seg, uint8 level, uint8 subindex) const +{ + if (level && level >= seg->silf()->numJustLevels()) return 0; + + if (m_justs) + return m_justs->values[level * SlotJustify::NUMJUSTPARAMS + subindex]; + + if (level >= seg->silf()->numJustLevels()) return 0; + Justinfo *jAttrs = seg->silf()->justAttrs() + level; + + switch (subindex) { + case 0 : return seg->glyphAttr(gid(), jAttrs->attrStretch()); + case 1 : return seg->glyphAttr(gid(), jAttrs->attrShrink()); + case 2 : return seg->glyphAttr(gid(), jAttrs->attrStep()); + case 3 : return seg->glyphAttr(gid(), jAttrs->attrWeight()); + case 4 : return 0; // not been set yet, so clearly 0 + default: return 0; + } +} + +void Slot::setJustify(Segment *seg, uint8 level, uint8 subindex, int16 value) +{ + if (level && level >= seg->silf()->numJustLevels()) return; + if (!m_justs) + { + SlotJustify *j = seg->newJustify(); + if (!j) return; + j->LoadSlot(this, seg); + m_justs = j; + } + m_justs->values[level * SlotJustify::NUMJUSTPARAMS + subindex] = value; +} + +bool Slot::child(Slot *ap) +{ + if (this == ap) return false; + else if (ap == m_child) return true; + else if (!m_child) + m_child = ap; + else + return m_child->sibling(ap); + return true; +} + +bool Slot::sibling(Slot *ap) +{ + if (this == ap) return false; + else if (ap == m_sibling) return true; + else if (!m_sibling || !ap) + m_sibling = ap; + else + return m_sibling->sibling(ap); + return true; +} + +bool Slot::removeChild(Slot *ap) +{ + if (this == ap || !m_child || !ap) return false; + else if (ap == m_child) + { + Slot *nSibling = m_child->nextSibling(); + m_child->nextSibling(NULL); + m_child = nSibling; + return true; + } + for (Slot *p = m_child; p; p = p->m_sibling) + { + if (p->m_sibling && p->m_sibling == ap) + { + p->m_sibling = p->m_sibling->m_sibling; + ap->nextSibling(NULL); + return true; + } + } + return false; +} + +void Slot::setGlyph(Segment *seg, uint16 glyphid, const GlyphFace * theGlyph) +{ + m_glyphid = glyphid; + m_bidiCls = -1; + if (!theGlyph) + { + theGlyph = seg->getFace()->glyphs().glyphSafe(glyphid); + if (!theGlyph) + { + m_realglyphid = 0; + m_advance = Position(0.,0.); + return; + } + } + m_realglyphid = theGlyph->attrs()[seg->silf()->aPseudo()]; + if (m_realglyphid > seg->getFace()->glyphs().numGlyphs()) + m_realglyphid = 0; + const GlyphFace *aGlyph = theGlyph; + if (m_realglyphid) + { + aGlyph = seg->getFace()->glyphs().glyphSafe(m_realglyphid); + if (!aGlyph) aGlyph = theGlyph; + } + m_advance = Position(aGlyph->theAdvance().x, 0.); + if (seg->silf()->aPassBits()) + { + seg->mergePassBits(uint8(theGlyph->attrs()[seg->silf()->aPassBits()])); + if (seg->silf()->numPasses() > 16) + seg->mergePassBits(theGlyph->attrs()[seg->silf()->aPassBits()+1] << 16); + } +} + +void Slot::floodShift(Position adj, int depth) +{ + if (depth > 100) + return; + m_position += adj; + if (m_child) m_child->floodShift(adj, depth + 1); + if (m_sibling) m_sibling->floodShift(adj, depth + 1); +} + +void SlotJustify::LoadSlot(const Slot *s, const Segment *seg) +{ + for (int i = seg->silf()->numJustLevels() - 1; i >= 0; --i) + { + Justinfo *justs = seg->silf()->justAttrs() + i; + int16 *v = values + i * NUMJUSTPARAMS; + v[0] = seg->glyphAttr(s->gid(), justs->attrStretch()); + v[1] = seg->glyphAttr(s->gid(), justs->attrShrink()); + v[2] = seg->glyphAttr(s->gid(), justs->attrStep()); + v[3] = seg->glyphAttr(s->gid(), justs->attrWeight()); + } +} + +Slot * Slot::nextInCluster(const Slot *s) const +{ + Slot *base; + if (s->firstChild()) + return s->firstChild(); + else if (s->nextSibling()) + return s->nextSibling(); + while ((base = s->attachedTo())) + { + // if (base->firstChild() == s && base->nextSibling()) + if (base->nextSibling()) + return base->nextSibling(); + s = base; + } + return NULL; +} + +bool Slot::isChildOf(const Slot *base) const +{ + for (Slot *p = m_parent; p; p = p->m_parent) + if (p == base) + return true; + return false; +} |