Index: core/src/fxge/fx_freetype/fxft2.5.01/src/cff/cf2hints.c |
diff --git a/core/src/fxge/fx_freetype/fxft2.5.01/src/cff/cf2hints.c b/core/src/fxge/fx_freetype/fxft2.5.01/src/cff/cf2hints.c |
deleted file mode 100644 |
index 70926299f3f1e5918a9becc855d58dbb34000775..0000000000000000000000000000000000000000 |
--- a/core/src/fxge/fx_freetype/fxft2.5.01/src/cff/cf2hints.c |
+++ /dev/null |
@@ -1,1752 +0,0 @@ |
-/***************************************************************************/ |
-/* */ |
-/* cf2hints.c */ |
-/* */ |
-/* Adobe's code for handling CFF hints (body). */ |
-/* */ |
-/* Copyright 2007-2013 Adobe Systems Incorporated. */ |
-/* */ |
-/* This software, and all works of authorship, whether in source or */ |
-/* object code form as indicated by the copyright notice(s) included */ |
-/* herein (collectively, the "Work") is made available, and may only be */ |
-/* used, modified, and distributed under the FreeType Project License, */ |
-/* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ |
-/* FreeType Project License, each contributor to the Work hereby grants */ |
-/* to any individual or legal entity exercising permissions granted by */ |
-/* the FreeType Project License and this section (hereafter, "You" or */ |
-/* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ |
-/* royalty-free, irrevocable (except as stated in this section) patent */ |
-/* license to make, have made, use, offer to sell, sell, import, and */ |
-/* otherwise transfer the Work, where such license applies only to those */ |
-/* patent claims licensable by such contributor that are necessarily */ |
-/* infringed by their contribution(s) alone or by combination of their */ |
-/* contribution(s) with the Work to which such contribution(s) was */ |
-/* submitted. If You institute patent litigation against any entity */ |
-/* (including a cross-claim or counterclaim in a lawsuit) alleging that */ |
-/* the Work or a contribution incorporated within the Work constitutes */ |
-/* direct or contributory patent infringement, then any patent licenses */ |
-/* granted to You under this License for that Work shall terminate as of */ |
-/* the date such litigation is filed. */ |
-/* */ |
-/* By using, modifying, or distributing the Work you indicate that you */ |
-/* have read and understood the terms and conditions of the */ |
-/* FreeType Project License as well as those provided in this section, */ |
-/* and you accept them fully. */ |
-/* */ |
-/***************************************************************************/ |
- |
- |
-#include "cf2ft.h" |
-#include "../../include/freetype/internal/ftdebug.h" |
- |
-#include "cf2glue.h" |
-#include "cf2font.h" |
-#include "cf2hints.h" |
-#include "cf2intrp.h" |
- |
- |
- /*************************************************************************/ |
- /* */ |
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
- /* messages during execution. */ |
- /* */ |
-#undef FT_COMPONENT |
-#define FT_COMPONENT trace_cf2hints |
- |
- |
- typedef struct CF2_HintMoveRec_ |
- { |
- size_t j; /* index of upper hint map edge */ |
- CF2_Fixed moveUp; /* adjustment to optimum position */ |
- |
- } CF2_HintMoveRec, *CF2_HintMove; |
- |
- |
- /* Compute angular momentum for winding order detection. It is called */ |
- /* for all lines and curves, but not necessarily in element order. */ |
- static CF2_Int |
- cf2_getWindingMomentum( CF2_Fixed x1, |
- CF2_Fixed y1, |
- CF2_Fixed x2, |
- CF2_Fixed y2 ) |
- { |
- /* cross product of pt1 position from origin with pt2 position from */ |
- /* pt1; we reduce the precision so that the result fits into 32 bits */ |
- |
- return ( x1 >> 16 ) * ( ( y2 - y1 ) >> 16 ) - |
- ( y1 >> 16 ) * ( ( x2 - x1 ) >> 16 ); |
- } |
- |
- |
- /* |
- * Construct from a StemHint; this is used as a parameter to |
- * `cf2_blues_capture'. |
- * `hintOrigin' is the character space displacement of a seac accent. |
- * Adjust stem hint for darkening here. |
- * |
- */ |
- static void |
- cf2_hint_init( CF2_Hint hint, |
- const CF2_ArrStack stemHintArray, |
- size_t indexStemHint, |
- const CF2_Font font, |
- CF2_Fixed hintOrigin, |
- CF2_Fixed scale, |
- FT_Bool bottom ) |
- { |
- CF2_Fixed width; |
- const CF2_StemHintRec* stemHint; |
- |
- |
- FT_ZERO( hint ); |
- |
- stemHint = (const CF2_StemHintRec*)cf2_arrstack_getPointer( |
- stemHintArray, |
- indexStemHint ); |
- |
- width = stemHint->max - stemHint->min; |
- |
- if ( width == cf2_intToFixed( -21 ) ) |
- { |
- /* ghost bottom */ |
- |
- if ( bottom ) |
- { |
- hint->csCoord = stemHint->max; |
- hint->flags = CF2_GhostBottom; |
- } |
- else |
- hint->flags = 0; |
- } |
- |
- else if ( width == cf2_intToFixed( -20 ) ) |
- { |
- /* ghost top */ |
- |
- if ( bottom ) |
- hint->flags = 0; |
- else |
- { |
- hint->csCoord = stemHint->min; |
- hint->flags = CF2_GhostTop; |
- } |
- } |
- |
- else if ( width < 0 ) |
- { |
- /* inverted pair */ |
- |
- /* |
- * Hints with negative widths were produced by an early version of a |
- * non-Adobe font tool. The Type 2 spec allows edge (ghost) hints |
- * with negative widths, but says |
- * |
- * All other negative widths have undefined meaning. |
- * |
- * CoolType has a silent workaround that negates the hint width; for |
- * permissive mode, we do the same here. |
- * |
- * Note: Such fonts cannot use ghost hints, but should otherwise work. |
- * Note: Some poor hints in our faux fonts can produce negative |
- * widths at some blends. For example, see a light weight of |
- * `u' in ASerifMM. |
- * |
- */ |
- if ( bottom ) |
- { |
- hint->csCoord = stemHint->max; |
- hint->flags = CF2_PairBottom; |
- } |
- else |
- { |
- hint->csCoord = stemHint->min; |
- hint->flags = CF2_PairTop; |
- } |
- } |
- |
- else |
- { |
- /* normal pair */ |
- |
- if ( bottom ) |
- { |
- hint->csCoord = stemHint->min; |
- hint->flags = CF2_PairBottom; |
- } |
- else |
- { |
- hint->csCoord = stemHint->max; |
- hint->flags = CF2_PairTop; |
- } |
- } |
- |
- /* Now that ghost hints have been detected, adjust this edge for */ |
- /* darkening. Bottoms are not changed; tops are incremented by twice */ |
- /* `darkenY'. */ |
- if ( cf2_hint_isTop( hint ) ) |
- hint->csCoord += 2 * font->darkenY; |
- |
- hint->csCoord += hintOrigin; |
- hint->scale = scale; |
- hint->index = indexStemHint; /* index in original stem hint array */ |
- |
- /* if original stem hint has been used, use the same position */ |
- if ( hint->flags != 0 && stemHint->used ) |
- { |
- if ( cf2_hint_isTop( hint ) ) |
- hint->dsCoord = stemHint->maxDS; |
- else |
- hint->dsCoord = stemHint->minDS; |
- |
- cf2_hint_lock( hint ); |
- } |
- else |
- hint->dsCoord = FT_MulFix( hint->csCoord, scale ); |
- } |
- |
- |
- /* initialize an invalid hint map element */ |
- static void |
- cf2_hint_initZero( CF2_Hint hint ) |
- { |
- FT_ZERO( hint ); |
- } |
- |
- |
- FT_LOCAL_DEF( FT_Bool ) |
- cf2_hint_isValid( const CF2_Hint hint ) |
- { |
- return (FT_Bool)( hint->flags != 0 ); |
- } |
- |
- |
- static FT_Bool |
- cf2_hint_isPair( const CF2_Hint hint ) |
- { |
- return (FT_Bool)( ( hint->flags & |
- ( CF2_PairBottom | CF2_PairTop ) ) != 0 ); |
- } |
- |
- |
- static FT_Bool |
- cf2_hint_isPairTop( const CF2_Hint hint ) |
- { |
- return (FT_Bool)( ( hint->flags & CF2_PairTop ) != 0 ); |
- } |
- |
- |
- FT_LOCAL_DEF( FT_Bool ) |
- cf2_hint_isTop( const CF2_Hint hint ) |
- { |
- return (FT_Bool)( ( hint->flags & |
- ( CF2_PairTop | CF2_GhostTop ) ) != 0 ); |
- } |
- |
- |
- FT_LOCAL_DEF( FT_Bool ) |
- cf2_hint_isBottom( const CF2_Hint hint ) |
- { |
- return (FT_Bool)( ( hint->flags & |
- ( CF2_PairBottom | CF2_GhostBottom ) ) != 0 ); |
- } |
- |
- |
- static FT_Bool |
- cf2_hint_isLocked( const CF2_Hint hint ) |
- { |
- return (FT_Bool)( ( hint->flags & CF2_Locked ) != 0 ); |
- } |
- |
- |
- static FT_Bool |
- cf2_hint_isSynthetic( const CF2_Hint hint ) |
- { |
- return (FT_Bool)( ( hint->flags & CF2_Synthetic ) != 0 ); |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_hint_lock( CF2_Hint hint ) |
- { |
- hint->flags |= CF2_Locked; |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_hintmap_init( CF2_HintMap hintmap, |
- CF2_Font font, |
- CF2_HintMap initialMap, |
- CF2_ArrStack hintMoves, |
- CF2_Fixed scale ) |
- { |
- FT_ZERO( hintmap ); |
- |
- /* copy parameters from font instance */ |
- hintmap->hinted = font->hinted; |
- hintmap->scale = scale; |
- hintmap->font = font; |
- hintmap->initialHintMap = initialMap; |
- /* will clear in `cf2_hintmap_adjustHints' */ |
- hintmap->hintMoves = hintMoves; |
- } |
- |
- |
- static FT_Bool |
- cf2_hintmap_isValid( const CF2_HintMap hintmap ) |
- { |
- return hintmap->isValid; |
- } |
- |
- |
- /* transform character space coordinate to device space using hint map */ |
- static CF2_Fixed |
- cf2_hintmap_map( CF2_HintMap hintmap, |
- CF2_Fixed csCoord ) |
- { |
- FT_ASSERT( hintmap->isValid ); /* must call Build before Map */ |
- FT_ASSERT( hintmap->lastIndex < CF2_MAX_HINT_EDGES ); |
- |
- if ( hintmap->count == 0 || ! hintmap->hinted ) |
- { |
- /* there are no hints; use uniform scale and zero offset */ |
- return FT_MulFix( csCoord, hintmap->scale ); |
- } |
- else |
- { |
- /* start linear search from last hit */ |
- CF2_UInt i = hintmap->lastIndex; |
- |
- |
- /* search up */ |
- while ( i < hintmap->count - 1 && |
- csCoord >= hintmap->edge[i + 1].csCoord ) |
- i += 1; |
- |
- /* search down */ |
- while ( i > 0 && csCoord < hintmap->edge[i].csCoord ) |
- i -= 1; |
- |
- hintmap->lastIndex = i; |
- |
- if ( i == 0 && csCoord < hintmap->edge[0].csCoord ) |
- { |
- /* special case for points below first edge: use uniform scale */ |
- return FT_MulFix( csCoord - hintmap->edge[0].csCoord, |
- hintmap->scale ) + |
- hintmap->edge[0].dsCoord; |
- } |
- else |
- { |
- /* |
- * Note: entries with duplicate csCoord are allowed. |
- * Use edge[i], the highest entry where csCoord >= entry[i].csCoord |
- */ |
- return FT_MulFix( csCoord - hintmap->edge[i].csCoord, |
- hintmap->edge[i].scale ) + |
- hintmap->edge[i].dsCoord; |
- } |
- } |
- } |
- |
- |
- /* |
- * This hinting policy moves a hint pair in device space so that one of |
- * its two edges is on a device pixel boundary (its fractional part is |
- * zero). `cf2_hintmap_insertHint' guarantees no overlap in CS |
- * space. Ensure here that there is no overlap in DS. |
- * |
- * In the first pass, edges are adjusted relative to adjacent hints. |
- * Those that are below have already been adjusted. Those that are |
- * above have not yet been adjusted. If a hint above blocks an |
- * adjustment to an optimal position, we will try again in a second |
- * pass. The second pass is top-down. |
- * |
- */ |
- |
- static void |
- cf2_hintmap_adjustHints( CF2_HintMap hintmap ) |
- { |
- size_t i, j; |
- |
- |
- cf2_arrstack_clear( hintmap->hintMoves ); /* working storage */ |
- |
- /* |
- * First pass is bottom-up (font hint order) without look-ahead. |
- * Locked edges are already adjusted. |
- * Unlocked edges begin with dsCoord from `initialHintMap'. |
- * Save edges that are not optimally adjusted in `hintMoves' array, |
- * and process them in second pass. |
- */ |
- |
- for ( i = 0; i < hintmap->count; i++ ) |
- { |
- FT_Bool isPair = cf2_hint_isPair( &hintmap->edge[i] ); |
- |
- |
- /* index of upper edge (same value for ghost hint) */ |
- j = isPair ? i + 1 : i; |
- |
- FT_ASSERT( j < hintmap->count ); |
- FT_ASSERT( cf2_hint_isValid( &hintmap->edge[i] ) ); |
- FT_ASSERT( cf2_hint_isValid( &hintmap->edge[j] ) ); |
- FT_ASSERT( cf2_hint_isLocked( &hintmap->edge[i] ) == |
- cf2_hint_isLocked( &hintmap->edge[j] ) ); |
- |
- if ( !cf2_hint_isLocked( &hintmap->edge[i] ) ) |
- { |
- /* hint edge is not locked, we can adjust it */ |
- CF2_Fixed fracDown = cf2_fixedFraction( hintmap->edge[i].dsCoord ); |
- CF2_Fixed fracUp = cf2_fixedFraction( hintmap->edge[j].dsCoord ); |
- |
- /* calculate all four possibilities; moves down are negative */ |
- CF2_Fixed downMoveDown = 0 - fracDown; |
- CF2_Fixed upMoveDown = 0 - fracUp; |
- CF2_Fixed downMoveUp = fracDown == 0 |
- ? 0 |
- : cf2_intToFixed( 1 ) - fracDown; |
- CF2_Fixed upMoveUp = fracUp == 0 |
- ? 0 |
- : cf2_intToFixed( 1 ) - fracUp; |
- |
- /* smallest move up */ |
- CF2_Fixed moveUp = FT_MIN( downMoveUp, upMoveUp ); |
- /* smallest move down */ |
- CF2_Fixed moveDown = FT_MAX( downMoveDown, upMoveDown ); |
- |
- /* final amount to move edge or edge pair */ |
- CF2_Fixed move; |
- |
- CF2_Fixed downMinCounter = CF2_MIN_COUNTER; |
- CF2_Fixed upMinCounter = CF2_MIN_COUNTER; |
- FT_Bool saveEdge = FALSE; |
- |
- |
- /* minimum counter constraint doesn't apply when adjacent edges */ |
- /* are synthetic */ |
- /* TODO: doesn't seem a big effect; for now, reduce the code */ |
-#if 0 |
- if ( i == 0 || |
- cf2_hint_isSynthetic( &hintmap->edge[i - 1] ) ) |
- downMinCounter = 0; |
- |
- if ( j >= hintmap->count - 1 || |
- cf2_hint_isSynthetic( &hintmap->edge[j + 1] ) ) |
- upMinCounter = 0; |
-#endif |
- |
- /* is there room to move up? */ |
- /* there is if we are at top of array or the next edge is at or */ |
- /* beyond proposed move up? */ |
- if ( j >= hintmap->count - 1 || |
- hintmap->edge[j + 1].dsCoord >= |
- hintmap->edge[j].dsCoord + moveUp + upMinCounter ) |
- { |
- /* there is room to move up; is there also room to move down? */ |
- if ( i == 0 || |
- hintmap->edge[i - 1].dsCoord <= |
- hintmap->edge[i].dsCoord + moveDown - downMinCounter ) |
- { |
- /* move smaller absolute amount */ |
- move = ( -moveDown < moveUp ) ? moveDown : moveUp; /* optimum */ |
- } |
- else |
- move = moveUp; |
- } |
- else |
- { |
- /* is there room to move down? */ |
- if ( i == 0 || |
- hintmap->edge[i - 1].dsCoord <= |
- hintmap->edge[i].dsCoord + moveDown - downMinCounter ) |
- { |
- move = moveDown; |
- /* true if non-optimum move */ |
- saveEdge = (FT_Bool)( moveUp < -moveDown ); |
- } |
- else |
- { |
- /* no room to move either way without overlapping or reducing */ |
- /* the counter too much */ |
- move = 0; |
- saveEdge = TRUE; |
- } |
- } |
- |
- /* Identify non-moves and moves down that aren't optimal, and save */ |
- /* them for second pass. */ |
- /* Do this only if there is an unlocked edge above (which could */ |
- /* possibly move). */ |
- if ( saveEdge && |
- j < hintmap->count - 1 && |
- !cf2_hint_isLocked( &hintmap->edge[j + 1] ) ) |
- { |
- CF2_HintMoveRec savedMove; |
- |
- |
- savedMove.j = j; |
- /* desired adjustment in second pass */ |
- savedMove.moveUp = moveUp - move; |
- |
- cf2_arrstack_push( hintmap->hintMoves, &savedMove ); |
- } |
- |
- /* move the edge(s) */ |
- hintmap->edge[i].dsCoord += move; |
- if ( isPair ) |
- hintmap->edge[j].dsCoord += move; |
- } |
- |
- /* assert there are no overlaps in device space */ |
- FT_ASSERT( i == 0 || |
- hintmap->edge[i - 1].dsCoord <= hintmap->edge[i].dsCoord ); |
- FT_ASSERT( i < j || |
- hintmap->edge[i].dsCoord <= hintmap->edge[j].dsCoord ); |
- |
- /* adjust the scales, avoiding divide by zero */ |
- if ( i > 0 ) |
- { |
- if ( hintmap->edge[i].csCoord != hintmap->edge[i - 1].csCoord ) |
- hintmap->edge[i - 1].scale = |
- FT_DivFix( |
- hintmap->edge[i].dsCoord - hintmap->edge[i - 1].dsCoord, |
- hintmap->edge[i].csCoord - hintmap->edge[i - 1].csCoord ); |
- } |
- |
- if ( isPair ) |
- { |
- if ( hintmap->edge[j].csCoord != hintmap->edge[j - 1].csCoord ) |
- hintmap->edge[j - 1].scale = |
- FT_DivFix( |
- hintmap->edge[j].dsCoord - hintmap->edge[j - 1].dsCoord, |
- hintmap->edge[j].csCoord - hintmap->edge[j - 1].csCoord ); |
- |
- i += 1; /* skip upper edge on next loop */ |
- } |
- } |
- |
- /* second pass tries to move non-optimal hints up, in case there is */ |
- /* room now */ |
- for ( i = cf2_arrstack_size( hintmap->hintMoves ); i > 0; i-- ) |
- { |
- CF2_HintMove hintMove = (CF2_HintMove) |
- cf2_arrstack_getPointer( hintmap->hintMoves, i - 1 ); |
- |
- |
- j = hintMove->j; |
- |
- /* this was tested before the push, above */ |
- FT_ASSERT( j < hintmap->count - 1 ); |
- |
- /* is there room to move up? */ |
- if ( hintmap->edge[j + 1].dsCoord >= |
- hintmap->edge[j].dsCoord + hintMove->moveUp + CF2_MIN_COUNTER ) |
- { |
- /* there is more room now, move edge up */ |
- hintmap->edge[j].dsCoord += hintMove->moveUp; |
- |
- if ( cf2_hint_isPair( &hintmap->edge[j] ) ) |
- { |
- FT_ASSERT( j > 0 ); |
- hintmap->edge[j - 1].dsCoord += hintMove->moveUp; |
- } |
- } |
- } |
- } |
- |
- |
- /* insert hint edges into map, sorted by csCoord */ |
- static void |
- cf2_hintmap_insertHint( CF2_HintMap hintmap, |
- CF2_Hint bottomHintEdge, |
- CF2_Hint topHintEdge ) |
- { |
- CF2_UInt indexInsert; |
- |
- /* set default values, then check for edge hints */ |
- FT_Bool isPair = TRUE; |
- CF2_Hint firstHintEdge = bottomHintEdge; |
- CF2_Hint secondHintEdge = topHintEdge; |
- |
- |
- /* one or none of the input params may be invalid when dealing with */ |
- /* edge hints; at least one edge must be valid */ |
- FT_ASSERT( cf2_hint_isValid( bottomHintEdge ) || |
- cf2_hint_isValid( topHintEdge ) ); |
- |
- /* determine how many and which edges to insert */ |
- if ( !cf2_hint_isValid( bottomHintEdge ) ) |
- { |
- /* insert only the top edge */ |
- firstHintEdge = topHintEdge; |
- isPair = FALSE; |
- } |
- else if ( !cf2_hint_isValid( topHintEdge ) ) |
- { |
- /* insert only the bottom edge */ |
- isPair = FALSE; |
- } |
- |
- /* paired edges must be in proper order */ |
- FT_ASSERT( !isPair || |
- topHintEdge->csCoord >= bottomHintEdge->csCoord ); |
- |
- /* linear search to find index value of insertion point */ |
- indexInsert = 0; |
- for ( ; indexInsert < hintmap->count; indexInsert++ ) |
- { |
- if ( hintmap->edge[indexInsert].csCoord > firstHintEdge->csCoord ) |
- break; |
- } |
- |
- /* |
- * Discard any hints that overlap in character space. Most often, |
- * this is while building the initial map, but in theory, it can also |
- * occur because of darkening. |
- * |
- */ |
- if ( indexInsert < hintmap->count ) |
- { |
- /* we are inserting before an existing edge: */ |
- /* verify that a new pair does not straddle the next edge */ |
- if ( isPair && |
- hintmap->edge[indexInsert].csCoord < secondHintEdge->csCoord ) |
- return; /* ignore overlapping stem hint */ |
- |
- /* verify that we are not inserting between paired edges */ |
- if ( cf2_hint_isPairTop( &hintmap->edge[indexInsert] ) ) |
- return; /* ignore overlapping stem hint */ |
- } |
- |
- /* recompute device space locations using initial hint map */ |
- if ( cf2_hintmap_isValid( hintmap->initialHintMap ) && |
- !cf2_hint_isLocked( firstHintEdge ) ) |
- { |
- if ( isPair ) |
- { |
- /* Use hint map to position the center of stem, and nominal scale */ |
- /* to position the two edges. This preserves the stem width. */ |
- CF2_Fixed midpoint = cf2_hintmap_map( |
- hintmap->initialHintMap, |
- ( secondHintEdge->csCoord + |
- firstHintEdge->csCoord ) / 2 ); |
- CF2_Fixed halfWidth = FT_MulFix( |
- ( secondHintEdge->csCoord - |
- firstHintEdge->csCoord ) / 2, |
- hintmap->scale ); |
- |
- |
- firstHintEdge->dsCoord = midpoint - halfWidth; |
- secondHintEdge->dsCoord = midpoint + halfWidth; |
- } |
- else |
- firstHintEdge->dsCoord = cf2_hintmap_map( hintmap->initialHintMap, |
- firstHintEdge->csCoord ); |
- } |
- |
- /* discard any hints that overlap in device space; this can occur */ |
- /* because locked hints have been moved to align with blue zones */ |
- if ( indexInsert > 0 ) |
- { |
- /* we are inserting after an existing edge */ |
- if ( firstHintEdge->dsCoord < hintmap->edge[indexInsert - 1].dsCoord ) |
- return; |
- } |
- |
- if ( indexInsert < hintmap->count ) |
- { |
- /* we are inserting before an existing edge */ |
- if ( isPair ) |
- { |
- if ( secondHintEdge->dsCoord > hintmap->edge[indexInsert].dsCoord ) |
- return; |
- } |
- else |
- { |
- if ( firstHintEdge->dsCoord > hintmap->edge[indexInsert].dsCoord ) |
- return; |
- } |
- } |
- |
- /* make room to insert */ |
- { |
- CF2_Int iSrc = hintmap->count - 1; |
- CF2_Int iDst = isPair ? hintmap->count + 1 : hintmap->count; |
- |
- CF2_Int count = hintmap->count - indexInsert; |
- |
- |
- if ( iDst >= CF2_MAX_HINT_EDGES ) |
- { |
- FT_TRACE4(( "cf2_hintmap_insertHint: too many hintmaps\n" )); |
- return; |
- } |
- |
- while ( count-- ) |
- hintmap->edge[iDst--] = hintmap->edge[iSrc--]; |
- |
- /* insert first edge */ |
- hintmap->edge[indexInsert] = *firstHintEdge; /* copy struct */ |
- hintmap->count += 1; |
- |
- if ( isPair ) |
- { |
- /* insert second edge */ |
- hintmap->edge[indexInsert + 1] = *secondHintEdge; /* copy struct */ |
- hintmap->count += 1; |
- } |
- } |
- |
- return; |
- } |
- |
- |
- /* |
- * Build a map from hints and mask. |
- * |
- * This function may recur one level if `hintmap->initialHintMap' is not yet |
- * valid. |
- * If `initialMap' is true, simply build initial map. |
- * |
- * Synthetic hints are used in two ways. A hint at zero is inserted, if |
- * needed, in the initial hint map, to prevent translations from |
- * propagating across the origin. If synthetic em box hints are enabled |
- * for ideographic dictionaries, then they are inserted in all hint |
- * maps, including the initial one. |
- * |
- */ |
- FT_LOCAL_DEF( void ) |
- cf2_hintmap_build( CF2_HintMap hintmap, |
- CF2_ArrStack hStemHintArray, |
- CF2_ArrStack vStemHintArray, |
- CF2_HintMask hintMask, |
- CF2_Fixed hintOrigin, |
- FT_Bool initialMap ) |
- { |
- FT_Byte* maskPtr; |
- FT_Byte* maskEndPtr; // add by Xiaochuan_Liu |
- |
- CF2_Font font = hintmap->font; |
- CF2_HintMaskRec tempHintMask; |
- |
- size_t bitCount, i; |
- FT_Byte maskByte; |
- |
- |
- /* check whether initial map is constructed */ |
- if ( !initialMap && !cf2_hintmap_isValid( hintmap->initialHintMap ) ) |
- { |
- /* make recursive call with initialHintMap and temporary mask; */ |
- /* temporary mask will get all bits set, below */ |
- cf2_hintmask_init( &tempHintMask, hintMask->error ); |
- cf2_hintmap_build( hintmap->initialHintMap, |
- hStemHintArray, |
- vStemHintArray, |
- &tempHintMask, |
- hintOrigin, |
- TRUE ); |
- } |
- |
- if ( !cf2_hintmask_isValid( hintMask ) ) |
- { |
- /* without a hint mask, assume all hints are active */ |
- cf2_hintmask_setAll( hintMask, |
- cf2_arrstack_size( hStemHintArray ) + |
- cf2_arrstack_size( vStemHintArray ) ); |
- } |
- |
- /* begin by clearing the map */ |
- hintmap->count = 0; |
- hintmap->lastIndex = 0; |
- |
- /* make a copy of the hint mask so we can modify it */ |
- tempHintMask = *hintMask; |
- maskPtr = cf2_hintmask_getMaskPtr( &tempHintMask ); |
- maskEndPtr = maskPtr + ( CF2_MAX_HINTS + 7 ) / 8; |
- |
- |
- /* use the hStem hints only, which are first in the mask */ |
- /* TODO: compare this to cffhintmaskGetBitCount */ |
- bitCount = cf2_arrstack_size( hStemHintArray ); |
- |
- /* synthetic embox hints get highest priority */ |
- if ( font->blues.doEmBoxHints ) |
- { |
- CF2_HintRec dummy; |
- |
- |
- cf2_hint_initZero( &dummy ); /* invalid hint map element */ |
- |
- /* ghost bottom */ |
- cf2_hintmap_insertHint( hintmap, |
- &font->blues.emBoxBottomEdge, |
- &dummy ); |
- /* ghost top */ |
- cf2_hintmap_insertHint( hintmap, |
- &dummy, |
- &font->blues.emBoxTopEdge ); |
- } |
- |
- /* insert hints captured by a blue zone or already locked (higher */ |
- /* priority) */ |
- for ( i = 0, maskByte = 0x80; i < bitCount; i++ ) |
- { |
- if ( maskByte & *maskPtr ) |
- { |
- /* expand StemHint into two `CF2_Hint' elements */ |
- CF2_HintRec bottomHintEdge, topHintEdge; |
- |
- |
- cf2_hint_init( &bottomHintEdge, |
- hStemHintArray, |
- i, |
- font, |
- hintOrigin, |
- hintmap->scale, |
- TRUE /* bottom */ ); |
- cf2_hint_init( &topHintEdge, |
- hStemHintArray, |
- i, |
- font, |
- hintOrigin, |
- hintmap->scale, |
- FALSE /* top */ ); |
- |
- if ( cf2_hint_isLocked( &bottomHintEdge ) || |
- cf2_hint_isLocked( &topHintEdge ) || |
- cf2_blues_capture( &font->blues, |
- &bottomHintEdge, |
- &topHintEdge ) ) |
- { |
- /* insert captured hint into map */ |
- cf2_hintmap_insertHint( hintmap, &bottomHintEdge, &topHintEdge ); |
- |
- *maskPtr &= ~maskByte; /* turn off the bit for this hint */ |
- } |
- } |
- |
- if ( ( i & 7 ) == 7 ) |
- { |
- /* move to next mask byte */ |
- maskPtr++; |
- if (maskPtr >= maskEndPtr) |
- { |
- break; |
- } |
- |
- maskByte = 0x80; |
- } |
- else |
- maskByte >>= 1; |
- } |
- |
- /* initial hint map includes only captured hints plus maybe one at 0 */ |
- |
- /* |
- * TODO: There is a problem here because we are trying to build a |
- * single hint map containing all captured hints. It is |
- * possible for there to be conflicts between captured hints, |
- * either because of darkening or because the hints are in |
- * separate hint zones (we are ignoring hint zones for the |
- * initial map). An example of the latter is MinionPro-Regular |
- * v2.030 glyph 883 (Greek Capital Alpha with Psili) at 15ppem. |
- * A stem hint for the psili conflicts with the top edge hint |
- * for the base character. The stem hint gets priority because |
- * of its sort order. In glyph 884 (Greek Capital Alpha with |
- * Psili and Oxia), the top of the base character gets a stem |
- * hint, and the psili does not. This creates different initial |
- * maps for the two glyphs resulting in different renderings of |
- * the base character. Will probably defer this either as not |
- * worth the cost or as a font bug. I don't think there is any |
- * good reason for an accent to be captured by an alignment |
- * zone. -darnold 2/12/10 |
- */ |
- |
- if ( initialMap ) |
- { |
- /* Apply a heuristic that inserts a point for (0,0), unless it's */ |
- /* already covered by a mapping. This locks the baseline for glyphs */ |
- /* that have no baseline hints. */ |
- |
- if ( hintmap->count == 0 || |
- hintmap->edge[0].csCoord > 0 || |
- hintmap->edge[hintmap->count - 1].csCoord < 0 ) |
- { |
- /* all edges are above 0 or all edges are below 0; */ |
- /* construct a locked edge hint at 0 */ |
- |
- CF2_HintRec edge, invalid; |
- |
- |
- cf2_hint_initZero( &edge ); |
- |
- edge.flags = CF2_GhostBottom | |
- CF2_Locked | |
- CF2_Synthetic; |
- edge.scale = hintmap->scale; |
- |
- cf2_hint_initZero( &invalid ); |
- cf2_hintmap_insertHint( hintmap, &edge, &invalid ); |
- } |
- } |
- else |
- { |
- /* insert remaining hints */ |
- |
- maskPtr = cf2_hintmask_getMaskPtr( &tempHintMask ); |
- maskEndPtr = maskPtr + ( CF2_MAX_HINTS + 7 ) / 8; |
- |
- for ( i = 0, maskByte = 0x80; i < bitCount; i++ ) |
- { |
- if ( maskByte & *maskPtr ) |
- { |
- CF2_HintRec bottomHintEdge, topHintEdge; |
- |
- |
- cf2_hint_init( &bottomHintEdge, |
- hStemHintArray, |
- i, |
- font, |
- hintOrigin, |
- hintmap->scale, |
- TRUE /* bottom */ ); |
- cf2_hint_init( &topHintEdge, |
- hStemHintArray, |
- i, |
- font, |
- hintOrigin, |
- hintmap->scale, |
- FALSE /* top */ ); |
- |
- cf2_hintmap_insertHint( hintmap, &bottomHintEdge, &topHintEdge ); |
- } |
- |
- if ( ( i & 7 ) == 7 ) |
- { |
- /* move to next mask byte */ |
- maskPtr++; |
- if (maskPtr >= maskEndPtr) |
- { |
- break; |
- } |
- maskByte = 0x80; |
- } |
- else |
- maskByte >>= 1; |
- } |
- } |
- |
- /* |
- * Note: The following line is a convenient place to break when |
- * debugging hinting. Examine `hintmap->edge' for the list of |
- * enabled hints, then step over the call to see the effect of |
- * adjustment. We stop here first on the recursive call that |
- * creates the initial map, and then on each counter group and |
- * hint zone. |
- */ |
- |
- /* adjust positions of hint edges that are not locked to blue zones */ |
- cf2_hintmap_adjustHints( hintmap ); |
- |
- /* save the position of all hints that were used in this hint map; */ |
- /* if we use them again, we'll locate them in the same position */ |
- if ( !initialMap ) |
- { |
- for ( i = 0; i < hintmap->count; i++ ) |
- { |
- if ( !cf2_hint_isSynthetic( &hintmap->edge[i] ) ) |
- { |
- /* Note: include both valid and invalid edges */ |
- /* Note: top and bottom edges are copied back separately */ |
- CF2_StemHint stemhint = (CF2_StemHint) |
- cf2_arrstack_getPointer( hStemHintArray, |
- hintmap->edge[i].index ); |
- |
- |
- if ( cf2_hint_isTop( &hintmap->edge[i] ) ) |
- stemhint->maxDS = hintmap->edge[i].dsCoord; |
- else |
- stemhint->minDS = hintmap->edge[i].dsCoord; |
- |
- stemhint->used = TRUE; |
- } |
- } |
- } |
- |
- /* hint map is ready to use */ |
- hintmap->isValid = TRUE; |
- |
- /* remember this mask has been used */ |
- cf2_hintmask_setNew( hintMask, FALSE ); |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_glyphpath_init( CF2_GlyphPath glyphpath, |
- CF2_Font font, |
- CF2_OutlineCallbacks callbacks, |
- CF2_Fixed scaleY, |
- /* CF2_Fixed hShift, */ |
- CF2_ArrStack hStemHintArray, |
- CF2_ArrStack vStemHintArray, |
- CF2_HintMask hintMask, |
- CF2_Fixed hintOriginY, |
- const CF2_Blues blues, |
- const FT_Vector* fractionalTranslation ) |
- { |
- FT_ZERO( glyphpath ); |
- |
- glyphpath->font = font; |
- glyphpath->callbacks = callbacks; |
- |
- cf2_arrstack_init( &glyphpath->hintMoves, |
- font->memory, |
- &font->error, |
- sizeof ( CF2_HintMoveRec ) ); |
- |
- cf2_hintmap_init( &glyphpath->initialHintMap, |
- font, |
- &glyphpath->initialHintMap, |
- &glyphpath->hintMoves, |
- scaleY ); |
- cf2_hintmap_init( &glyphpath->firstHintMap, |
- font, |
- &glyphpath->initialHintMap, |
- &glyphpath->hintMoves, |
- scaleY ); |
- cf2_hintmap_init( &glyphpath->hintMap, |
- font, |
- &glyphpath->initialHintMap, |
- &glyphpath->hintMoves, |
- scaleY ); |
- |
- glyphpath->scaleX = font->innerTransform.a; |
- glyphpath->scaleC = font->innerTransform.c; |
- glyphpath->scaleY = font->innerTransform.d; |
- |
- glyphpath->fractionalTranslation = *fractionalTranslation; |
- |
-#if 0 |
- glyphpath->hShift = hShift; /* for fauxing */ |
-#endif |
- |
- glyphpath->hStemHintArray = hStemHintArray; |
- glyphpath->vStemHintArray = vStemHintArray; |
- glyphpath->hintMask = hintMask; /* ptr to current mask */ |
- glyphpath->hintOriginY = hintOriginY; |
- glyphpath->blues = blues; |
- glyphpath->darken = font->darkened; /* TODO: should we make copies? */ |
- glyphpath->xOffset = font->darkenX; |
- glyphpath->yOffset = font->darkenY; |
- glyphpath->miterLimit = 2 * FT_MAX( |
- cf2_fixedAbs( glyphpath->xOffset ), |
- cf2_fixedAbs( glyphpath->yOffset ) ); |
- |
- /* .1 character space unit */ |
- glyphpath->snapThreshold = cf2_floatToFixed( 0.1f ); |
- |
- glyphpath->moveIsPending = TRUE; |
- glyphpath->pathIsOpen = FALSE; |
- glyphpath->elemIsQueued = FALSE; |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_glyphpath_finalize( CF2_GlyphPath glyphpath ) |
- { |
- cf2_arrstack_finalize( &glyphpath->hintMoves ); |
- } |
- |
- |
- /* |
- * Hint point in y-direction and apply outerTransform. |
- * Input `current' hint map (which is actually delayed by one element). |
- * Input x,y point in Character Space. |
- * Output x,y point in Device Space, including translation. |
- */ |
- static void |
- cf2_glyphpath_hintPoint( CF2_GlyphPath glyphpath, |
- CF2_HintMap hintmap, |
- FT_Vector* ppt, |
- CF2_Fixed x, |
- CF2_Fixed y ) |
- { |
- FT_Vector pt; /* hinted point in upright DS */ |
- |
- |
- pt.x = FT_MulFix( glyphpath->scaleX, x ) + |
- FT_MulFix( glyphpath->scaleC, y ); |
- pt.y = cf2_hintmap_map( hintmap, y ); |
- |
- ppt->x = FT_MulFix( glyphpath->font->outerTransform.a, pt.x ) + |
- FT_MulFix( glyphpath->font->outerTransform.c, pt.y ) + |
- glyphpath->fractionalTranslation.x; |
- ppt->y = FT_MulFix( glyphpath->font->outerTransform.b, pt.x ) + |
- FT_MulFix( glyphpath->font->outerTransform.d, pt.y ) + |
- glyphpath->fractionalTranslation.y; |
- } |
- |
- |
- /* |
- * From two line segments, (u1,u2) and (v1,v2), compute a point of |
- * intersection on the corresponding lines. |
- * Return false if no intersection is found, or if the intersection is |
- * too far away from the ends of the line segments, u2 and v1. |
- * |
- */ |
- static FT_Bool |
- cf2_glyphpath_computeIntersection( CF2_GlyphPath glyphpath, |
- const FT_Vector* u1, |
- const FT_Vector* u2, |
- const FT_Vector* v1, |
- const FT_Vector* v2, |
- FT_Vector* intersection ) |
- { |
- /* |
- * Let `u' be a zero-based vector from the first segment, `v' from the |
- * second segment. |
- * Let `w 'be the zero-based vector from `u1' to `v1'. |
- * `perp' is the `perpendicular dot product'; see |
- * http://mathworld.wolfram.com/PerpDotProduct.html. |
- * `s' is the parameter for the parametric line for the first segment |
- * (`u'). |
- * |
- * See notation in |
- * http://softsurfer.com/Archive/algorithm_0104/algorithm_0104B.htm. |
- * Calculations are done in 16.16, but must handle the squaring of |
- * line lengths in character space. We scale all vectors by 1/32 to |
- * avoid overflow. This allows values up to 4095 to be squared. The |
- * scale factor cancels in the divide. |
- * |
- * TODO: the scale factor could be computed from UnitsPerEm. |
- * |
- */ |
- |
-#define cf2_perp( a, b ) \ |
- ( FT_MulFix( a.x, b.y ) - FT_MulFix( a.y, b.x ) ) |
- |
- /* round and divide by 32 */ |
-#define CF2_CS_SCALE( x ) \ |
- ( ( (x) + 0x10 ) >> 5 ) |
- |
- FT_Vector u, v, w; /* scaled vectors */ |
- CF2_Fixed denominator, s; |
- |
- |
- u.x = CF2_CS_SCALE( u2->x - u1->x ); |
- u.y = CF2_CS_SCALE( u2->y - u1->y ); |
- v.x = CF2_CS_SCALE( v2->x - v1->x ); |
- v.y = CF2_CS_SCALE( v2->y - v1->y ); |
- w.x = CF2_CS_SCALE( v1->x - u1->x ); |
- w.y = CF2_CS_SCALE( v1->y - u1->y ); |
- |
- denominator = cf2_perp( u, v ); |
- |
- if ( denominator == 0 ) |
- return FALSE; /* parallel or coincident lines */ |
- |
- s = FT_DivFix( cf2_perp( w, v ), denominator ); |
- |
- intersection->x = u1->x + FT_MulFix( s, u2->x - u1->x ); |
- intersection->y = u1->y + FT_MulFix( s, u2->y - u1->y ); |
- |
- /* |
- * Special case snapping for horizontal and vertical lines. |
- * This cleans up intersections and reduces problems with winding |
- * order detection. |
- * Sample case is sbc cd KozGoPr6N-Medium.otf 20 16685. |
- * Note: these calculations are in character space. |
- * |
- */ |
- |
- if ( u1->x == u2->x && |
- cf2_fixedAbs( intersection->x - u1->x ) < glyphpath->snapThreshold ) |
- intersection->x = u1->x; |
- if ( u1->y == u2->y && |
- cf2_fixedAbs( intersection->y - u1->y ) < glyphpath->snapThreshold ) |
- intersection->y = u1->y; |
- |
- if ( v1->x == v2->x && |
- cf2_fixedAbs( intersection->x - v1->x ) < glyphpath->snapThreshold ) |
- intersection->x = v1->x; |
- if ( v1->y == v2->y && |
- cf2_fixedAbs( intersection->y - v1->y ) < glyphpath->snapThreshold ) |
- intersection->y = v1->y; |
- |
- /* limit the intersection distance from midpoint of u2 and v1 */ |
- if ( cf2_fixedAbs( intersection->x - ( u2->x + v1->x ) / 2 ) > |
- glyphpath->miterLimit || |
- cf2_fixedAbs( intersection->y - ( u2->y + v1->y ) / 2 ) > |
- glyphpath->miterLimit ) |
- return FALSE; |
- |
- return TRUE; |
- } |
- |
- |
- /* |
- * Push the cached element (glyphpath->prevElem*) to the outline |
- * consumer. When a darkening offset is used, the end point of the |
- * cached element may be adjusted to an intersection point or it may be |
- * connected by a line to the current element. This calculation must |
- * use a HintMap that was valid at the time the element was saved. For |
- * the first point in a subpath, that is a saved HintMap. For most |
- * elements, it just means the caller has delayed building a HintMap |
- * from the current HintMask. |
- * |
- * Transform each point with outerTransform and call the outline |
- * callbacks. This is a general 3x3 transform: |
- * |
- * x' = a*x + c*y + tx, y' = b*x + d*y + ty |
- * |
- * but it uses 4 elements from CF2_Font and the translation part |
- * from CF2_GlyphPath. |
- * |
- */ |
- static void |
- cf2_glyphpath_pushPrevElem( CF2_GlyphPath glyphpath, |
- CF2_HintMap hintmap, |
- FT_Vector* nextP0, |
- FT_Vector nextP1, |
- FT_Bool close ) |
- { |
- CF2_CallbackParamsRec params; |
- |
- FT_Vector* prevP0; |
- FT_Vector* prevP1; |
- |
- FT_Vector intersection = { 0, 0 }; |
- FT_Bool useIntersection = FALSE; |
- |
- |
- FT_ASSERT( glyphpath->prevElemOp == CF2_PathOpLineTo || |
- glyphpath->prevElemOp == CF2_PathOpCubeTo ); |
- |
- if ( glyphpath->prevElemOp == CF2_PathOpLineTo ) |
- { |
- prevP0 = &glyphpath->prevElemP0; |
- prevP1 = &glyphpath->prevElemP1; |
- } |
- else |
- { |
- prevP0 = &glyphpath->prevElemP2; |
- prevP1 = &glyphpath->prevElemP3; |
- } |
- |
- /* optimization: if previous and next elements are offset by the same */ |
- /* amount, then there will be no gap, and no need to compute an */ |
- /* intersection. */ |
- if ( prevP1->x != nextP0->x || prevP1->y != nextP0->y ) |
- { |
- /* previous element does not join next element: */ |
- /* adjust end point of previous element to the intersection */ |
- useIntersection = cf2_glyphpath_computeIntersection( glyphpath, |
- prevP0, |
- prevP1, |
- nextP0, |
- &nextP1, |
- &intersection ); |
- if ( useIntersection ) |
- { |
- /* modify the last point of the cached element (either line or */ |
- /* curve) */ |
- *prevP1 = intersection; |
- } |
- } |
- |
- params.pt0 = glyphpath->currentDS; |
- |
- switch( glyphpath->prevElemOp ) |
- { |
- case CF2_PathOpLineTo: |
- params.op = CF2_PathOpLineTo; |
- |
- /* note: pt2 and pt3 are unused */ |
- cf2_glyphpath_hintPoint( glyphpath, |
- hintmap, |
- ¶ms.pt1, |
- glyphpath->prevElemP1.x, |
- glyphpath->prevElemP1.y ); |
- |
- glyphpath->callbacks->lineTo( glyphpath->callbacks, ¶ms ); |
- |
- glyphpath->currentDS = params.pt1; |
- |
- break; |
- |
- case CF2_PathOpCubeTo: |
- params.op = CF2_PathOpCubeTo; |
- |
- /* TODO: should we intersect the interior joins (p1-p2 and p2-p3)? */ |
- cf2_glyphpath_hintPoint( glyphpath, |
- hintmap, |
- ¶ms.pt1, |
- glyphpath->prevElemP1.x, |
- glyphpath->prevElemP1.y ); |
- cf2_glyphpath_hintPoint( glyphpath, |
- hintmap, |
- ¶ms.pt2, |
- glyphpath->prevElemP2.x, |
- glyphpath->prevElemP2.y ); |
- cf2_glyphpath_hintPoint( glyphpath, |
- hintmap, |
- ¶ms.pt3, |
- glyphpath->prevElemP3.x, |
- glyphpath->prevElemP3.y ); |
- |
- glyphpath->callbacks->cubeTo( glyphpath->callbacks, ¶ms ); |
- |
- glyphpath->currentDS = params.pt3; |
- |
- break; |
- } |
- |
- if ( !useIntersection || close ) |
- { |
- /* insert connecting line between end of previous element and start */ |
- /* of current one */ |
- /* note: at the end of a subpath, we might do both, so use `nextP0' */ |
- /* before we change it, below */ |
- |
- cf2_glyphpath_hintPoint( glyphpath, |
- hintmap, |
- ¶ms.pt1, |
- nextP0->x, |
- nextP0->y ); |
- |
- if ( params.pt1.x != glyphpath->currentDS.x || |
- params.pt1.y != glyphpath->currentDS.y ) |
- { |
- /* length is nonzero */ |
- params.op = CF2_PathOpLineTo; |
- params.pt0 = glyphpath->currentDS; |
- |
- /* note: pt2 and pt3 are unused */ |
- glyphpath->callbacks->lineTo( glyphpath->callbacks, ¶ms ); |
- |
- glyphpath->currentDS = params.pt1; |
- } |
- } |
- |
- if ( useIntersection ) |
- { |
- /* return intersection point to caller */ |
- *nextP0 = intersection; |
- } |
- } |
- |
- |
- /* push a MoveTo element based on current point and offset of current */ |
- /* element */ |
- static void |
- cf2_glyphpath_pushMove( CF2_GlyphPath glyphpath, |
- FT_Vector start ) |
- { |
- CF2_CallbackParamsRec params; |
- |
- |
- params.op = CF2_PathOpMoveTo; |
- params.pt0 = glyphpath->currentDS; |
- |
- /* Test if move has really happened yet; it would have called */ |
- /* `cf2_hintmap_build' to set `isValid'. */ |
- if ( !cf2_hintmap_isValid( &glyphpath->hintMap ) ) |
- { |
- /* we are here iff first subpath is missing a moveto operator: */ |
- /* synthesize first moveTo to finish initialization of hintMap */ |
- cf2_glyphpath_moveTo( glyphpath, |
- glyphpath->start.x, |
- glyphpath->start.y ); |
- } |
- |
- cf2_glyphpath_hintPoint( glyphpath, |
- &glyphpath->hintMap, |
- ¶ms.pt1, |
- start.x, |
- start.y ); |
- |
- /* note: pt2 and pt3 are unused */ |
- glyphpath->callbacks->moveTo( glyphpath->callbacks, ¶ms ); |
- |
- glyphpath->currentDS = params.pt1; |
- glyphpath->offsetStart0 = start; |
- } |
- |
- |
- /* |
- * All coordinates are in character space. |
- * On input, (x1, y1) and (x2, y2) give line segment. |
- * On output, (x, y) give offset vector. |
- * We use a piecewise approximation to trig functions. |
- * |
- * TODO: Offset true perpendicular and proper length |
- * supply the y-translation for hinting here, too, |
- * that adds yOffset unconditionally to *y. |
- */ |
- static void |
- cf2_glyphpath_computeOffset( CF2_GlyphPath glyphpath, |
- CF2_Fixed x1, |
- CF2_Fixed y1, |
- CF2_Fixed x2, |
- CF2_Fixed y2, |
- CF2_Fixed* x, |
- CF2_Fixed* y ) |
- { |
- CF2_Fixed dx = x2 - x1; |
- CF2_Fixed dy = y2 - y1; |
- |
- |
- /* note: negative offsets don't work here; negate deltas to change */ |
- /* quadrants, below */ |
- if ( glyphpath->font->reverseWinding ) |
- { |
- dx = -dx; |
- dy = -dy; |
- } |
- |
- *x = *y = 0; |
- |
- if ( !glyphpath->darken ) |
- return; |
- |
- /* add momentum for this path element */ |
- glyphpath->callbacks->windingMomentum += |
- cf2_getWindingMomentum( x1, y1, x2, y2 ); |
- |
- /* note: allow mixed integer and fixed multiplication here */ |
- if ( dx >= 0 ) |
- { |
- if ( dy >= 0 ) |
- { |
- /* first quadrant, +x +y */ |
- |
- if ( dx > 2 * dy ) |
- { |
- /* +x */ |
- *x = 0; |
- *y = 0; |
- } |
- else if ( dy > 2 * dx ) |
- { |
- /* +y */ |
- *x = glyphpath->xOffset; |
- *y = glyphpath->yOffset; |
- } |
- else |
- { |
- /* +x +y */ |
- *x = FT_MulFix( cf2_floatToFixed( 0.7 ), |
- glyphpath->xOffset ); |
- *y = FT_MulFix( cf2_floatToFixed( 1.0 - 0.7 ), |
- glyphpath->yOffset ); |
- } |
- } |
- else |
- { |
- /* fourth quadrant, +x -y */ |
- |
- if ( dx > -2 * dy ) |
- { |
- /* +x */ |
- *x = 0; |
- *y = 0; |
- } |
- else if ( -dy > 2 * dx ) |
- { |
- /* -y */ |
- *x = -glyphpath->xOffset; |
- *y = glyphpath->yOffset; |
- } |
- else |
- { |
- /* +x -y */ |
- *x = FT_MulFix( cf2_floatToFixed( -0.7 ), |
- glyphpath->xOffset ); |
- *y = FT_MulFix( cf2_floatToFixed( 1.0 - 0.7 ), |
- glyphpath->yOffset ); |
- } |
- } |
- } |
- else |
- { |
- if ( dy >= 0 ) |
- { |
- /* second quadrant, -x +y */ |
- |
- if ( -dx > 2 * dy ) |
- { |
- /* -x */ |
- *x = 0; |
- *y = 2 * glyphpath->yOffset; |
- } |
- else if ( dy > -2 * dx ) |
- { |
- /* +y */ |
- *x = glyphpath->xOffset; |
- *y = glyphpath->yOffset; |
- } |
- else |
- { |
- /* -x +y */ |
- *x = FT_MulFix( cf2_floatToFixed( 0.7 ), |
- glyphpath->xOffset ); |
- *y = FT_MulFix( cf2_floatToFixed( 1.0 + 0.7 ), |
- glyphpath->yOffset ); |
- } |
- } |
- else |
- { |
- /* third quadrant, -x -y */ |
- |
- if ( -dx > -2 * dy ) |
- { |
- /* -x */ |
- *x = 0; |
- *y = 2 * glyphpath->yOffset; |
- } |
- else if ( -dy > -2 * dx ) |
- { |
- /* -y */ |
- *x = -glyphpath->xOffset; |
- *y = glyphpath->xOffset; |
- } |
- else |
- { |
- /* -x -y */ |
- *x = FT_MulFix( cf2_floatToFixed( -0.7 ), |
- glyphpath->xOffset ); |
- *y = FT_MulFix( cf2_floatToFixed( 1.0 + 0.7 ), |
- glyphpath->yOffset ); |
- } |
- } |
- } |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_glyphpath_moveTo( CF2_GlyphPath glyphpath, |
- CF2_Fixed x, |
- CF2_Fixed y ) |
- { |
- cf2_glyphpath_closeOpenPath( glyphpath ); |
- |
- /* save the parameters of the move for later, when we'll know how to */ |
- /* offset it; */ |
- /* also save last move point */ |
- glyphpath->currentCS.x = glyphpath->start.x = x; |
- glyphpath->currentCS.y = glyphpath->start.y = y; |
- |
- glyphpath->moveIsPending = TRUE; |
- |
- /* ensure we have a valid map with current mask */ |
- if ( !cf2_hintmap_isValid( &glyphpath->hintMap ) || |
- cf2_hintmask_isNew( glyphpath->hintMask ) ) |
- cf2_hintmap_build( &glyphpath->hintMap, |
- glyphpath->hStemHintArray, |
- glyphpath->vStemHintArray, |
- glyphpath->hintMask, |
- glyphpath->hintOriginY, |
- FALSE ); |
- |
- /* save a copy of current HintMap to use when drawing initial point */ |
- glyphpath->firstHintMap = glyphpath->hintMap; /* structure copy */ |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_glyphpath_lineTo( CF2_GlyphPath glyphpath, |
- CF2_Fixed x, |
- CF2_Fixed y ) |
- { |
- CF2_Fixed xOffset, yOffset; |
- FT_Vector P0, P1; |
- |
- |
- /* can't compute offset of zero length line, so ignore them */ |
- if ( glyphpath->currentCS.x == x && glyphpath->currentCS.y == y ) |
- return; |
- |
- cf2_glyphpath_computeOffset( glyphpath, |
- glyphpath->currentCS.x, |
- glyphpath->currentCS.y, |
- x, |
- y, |
- &xOffset, |
- &yOffset ); |
- |
- /* construct offset points */ |
- P0.x = glyphpath->currentCS.x + xOffset; |
- P0.y = glyphpath->currentCS.y + yOffset; |
- P1.x = x + xOffset; |
- P1.y = y + yOffset; |
- |
- if ( glyphpath->moveIsPending ) |
- { |
- /* emit offset 1st point as MoveTo */ |
- cf2_glyphpath_pushMove( glyphpath, P0 ); |
- if (glyphpath->callbacks && glyphpath->callbacks->error && *glyphpath->callbacks->error) return; |
- |
- glyphpath->moveIsPending = FALSE; /* adjust state machine */ |
- glyphpath->pathIsOpen = TRUE; |
- |
- glyphpath->offsetStart1 = P1; /* record second point */ |
- } |
- |
- if ( glyphpath->elemIsQueued ) |
- { |
- FT_ASSERT( cf2_hintmap_isValid( &glyphpath->hintMap ) ); |
- |
- cf2_glyphpath_pushPrevElem( glyphpath, |
- &glyphpath->hintMap, |
- &P0, |
- P1, |
- FALSE ); |
- if (glyphpath->callbacks && glyphpath->callbacks->error && *glyphpath->callbacks->error) return; |
- } |
- |
- /* queue the current element with offset points */ |
- glyphpath->elemIsQueued = TRUE; |
- glyphpath->prevElemOp = CF2_PathOpLineTo; |
- glyphpath->prevElemP0 = P0; |
- glyphpath->prevElemP1 = P1; |
- |
- /* update current map */ |
- if ( cf2_hintmask_isNew( glyphpath->hintMask ) ) |
- cf2_hintmap_build( &glyphpath->hintMap, |
- glyphpath->hStemHintArray, |
- glyphpath->vStemHintArray, |
- glyphpath->hintMask, |
- glyphpath->hintOriginY, |
- FALSE ); |
- |
- glyphpath->currentCS.x = x; /* pre-offset current point */ |
- glyphpath->currentCS.y = y; |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_glyphpath_curveTo( CF2_GlyphPath glyphpath, |
- CF2_Fixed x1, |
- CF2_Fixed y1, |
- CF2_Fixed x2, |
- CF2_Fixed y2, |
- CF2_Fixed x3, |
- CF2_Fixed y3 ) |
- { |
- CF2_Fixed xOffset1, yOffset1, xOffset3, yOffset3; |
- FT_Vector P0, P1, P2, P3; |
- |
- |
- /* TODO: ignore zero length portions of curve?? */ |
- cf2_glyphpath_computeOffset( glyphpath, |
- glyphpath->currentCS.x, |
- glyphpath->currentCS.y, |
- x1, |
- y1, |
- &xOffset1, |
- &yOffset1 ); |
- cf2_glyphpath_computeOffset( glyphpath, |
- x2, |
- y2, |
- x3, |
- y3, |
- &xOffset3, |
- &yOffset3 ); |
- |
- /* add momentum from the middle segment */ |
- glyphpath->callbacks->windingMomentum += |
- cf2_getWindingMomentum( x1, y1, x2, y2 ); |
- |
- /* construct offset points */ |
- P0.x = glyphpath->currentCS.x + xOffset1; |
- P0.y = glyphpath->currentCS.y + yOffset1; |
- P1.x = x1 + xOffset1; |
- P1.y = y1 + yOffset1; |
- /* note: preserve angle of final segment by using offset3 at both ends */ |
- P2.x = x2 + xOffset3; |
- P2.y = y2 + yOffset3; |
- P3.x = x3 + xOffset3; |
- P3.y = y3 + yOffset3; |
- |
- if ( glyphpath->moveIsPending ) |
- { |
- /* emit offset 1st point as MoveTo */ |
- cf2_glyphpath_pushMove( glyphpath, P0 ); |
- if (glyphpath->callbacks && glyphpath->callbacks->error && *glyphpath->callbacks->error) return; |
- |
- glyphpath->moveIsPending = FALSE; |
- glyphpath->pathIsOpen = TRUE; |
- |
- glyphpath->offsetStart1 = P1; /* record second point */ |
- } |
- |
- if ( glyphpath->elemIsQueued ) |
- { |
- FT_ASSERT( cf2_hintmap_isValid( &glyphpath->hintMap ) ); |
- |
- cf2_glyphpath_pushPrevElem( glyphpath, |
- &glyphpath->hintMap, |
- &P0, |
- P1, |
- FALSE ); |
- if (glyphpath->callbacks && glyphpath->callbacks->error && *glyphpath->callbacks->error) return; |
- } |
- |
- /* queue the current element with offset points */ |
- glyphpath->elemIsQueued = TRUE; |
- glyphpath->prevElemOp = CF2_PathOpCubeTo; |
- glyphpath->prevElemP0 = P0; |
- glyphpath->prevElemP1 = P1; |
- glyphpath->prevElemP2 = P2; |
- glyphpath->prevElemP3 = P3; |
- |
- /* update current map */ |
- if ( cf2_hintmask_isNew( glyphpath->hintMask ) ) |
- cf2_hintmap_build( &glyphpath->hintMap, |
- glyphpath->hStemHintArray, |
- glyphpath->vStemHintArray, |
- glyphpath->hintMask, |
- glyphpath->hintOriginY, |
- FALSE ); |
- |
- glyphpath->currentCS.x = x3; /* pre-offset current point */ |
- glyphpath->currentCS.y = y3; |
- } |
- |
- |
- FT_LOCAL_DEF( void ) |
- cf2_glyphpath_closeOpenPath( CF2_GlyphPath glyphpath ) |
- { |
- if ( glyphpath->pathIsOpen ) |
- { |
- FT_ASSERT( cf2_hintmap_isValid( &glyphpath->firstHintMap ) ); |
- |
- /* since we need to apply an offset to the implicit lineto, we make */ |
- /* it explicit here */ |
- cf2_glyphpath_lineTo( glyphpath, |
- glyphpath->start.x, |
- glyphpath->start.y ); |
- if (glyphpath->callbacks && glyphpath->callbacks->error && *glyphpath->callbacks->error) return; |
- |
- /* Draw previous element (the explicit LineTo we just created, */ |
- /* above) and connect it to the start point, but with the offset we */ |
- /* saved from the first element. */ |
- /* Use the saved HintMap, too. */ |
- FT_ASSERT( glyphpath->elemIsQueued ); |
- |
- cf2_glyphpath_pushPrevElem( glyphpath, |
- &glyphpath->firstHintMap, |
- &glyphpath->offsetStart0, |
- glyphpath->offsetStart1, |
- TRUE ); |
- |
- /* reset state machine */ |
- glyphpath->moveIsPending = TRUE; |
- glyphpath->pathIsOpen = FALSE; |
- glyphpath->elemIsQueued = FALSE; |
- } |
- } |
- |
- |
-/* END */ |