Werner Lemberg
22 years ago
parent
134fecabc7
commit
9484a94d7d
17 changed files with 569 additions and 3510 deletions
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/***************************************************************************/ |
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/* */ |
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/* pshalgo1.c */ |
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/* */ |
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/* PostScript hinting algorithm 1 (body). */ |
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/* */ |
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/* Copyright 2001, 2002 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used */ |
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/* modified and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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/* */ |
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/***************************************************************************/ |
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|
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|
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#include <ft2build.h> |
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#include FT_INTERNAL_OBJECTS_H |
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#include FT_INTERNAL_DEBUG_H |
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#include "pshalgo1.h" |
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|
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#undef FT_COMPONENT |
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#define FT_COMPONENT trace_pshalgo1 |
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|
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#ifdef DEBUG_HINTER |
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PSH1_Hint_Table ps1_debug_hint_table = 0; |
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PSH1_HintFunc ps1_debug_hint_func = 0; |
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#endif |
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|
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/************************************************************************/ |
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/************************************************************************/ |
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/***** *****/ |
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/***** BASIC HINTS RECORDINGS *****/ |
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/***** *****/ |
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/************************************************************************/ |
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/************************************************************************/ |
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|
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/* return true iff two stem hints overlap */ |
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static FT_Int |
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psh1_hint_overlap( PSH1_Hint hint1, |
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PSH1_Hint hint2 ) |
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{ |
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return ( hint1->org_pos + hint1->org_len >= hint2->org_pos && |
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hint2->org_pos + hint2->org_len >= hint1->org_pos ); |
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} |
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|
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/* destroy hints table */ |
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static void |
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psh1_hint_table_done( PSH1_Hint_Table table, |
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FT_Memory memory ) |
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{ |
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FT_FREE( table->zones ); |
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table->num_zones = 0; |
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table->zone = 0; |
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|
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FT_FREE( table->sort ); |
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FT_FREE( table->hints ); |
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table->num_hints = 0; |
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table->max_hints = 0; |
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table->sort_global = 0; |
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} |
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|
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/* deactivate all hints in a table */ |
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static void |
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psh1_hint_table_deactivate( PSH1_Hint_Table table ) |
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{ |
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FT_UInt count = table->max_hints; |
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PSH1_Hint hint = table->hints; |
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for ( ; count > 0; count--, hint++ ) |
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{ |
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psh1_hint_deactivate( hint ); |
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hint->order = -1; |
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} |
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} |
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/* internal function used to record a new hint */ |
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static void |
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psh1_hint_table_record( PSH1_Hint_Table table, |
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FT_UInt idx ) |
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{ |
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PSH1_Hint hint = table->hints + idx; |
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if ( idx >= table->max_hints ) |
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{ |
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FT_ERROR(( "%s.activate: invalid hint index %d\n", idx )); |
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return; |
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} |
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|
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/* ignore active hints */ |
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if ( psh1_hint_is_active( hint ) ) |
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return; |
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psh1_hint_activate( hint ); |
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/* now scan the current active hint set in order to determine */ |
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/* if we are overlapping with another segment */ |
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{ |
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PSH1_Hint* sorted = table->sort_global; |
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FT_UInt count = table->num_hints; |
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PSH1_Hint hint2; |
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hint->parent = 0; |
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for ( ; count > 0; count--, sorted++ ) |
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{ |
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hint2 = sorted[0]; |
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if ( psh1_hint_overlap( hint, hint2 ) ) |
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{ |
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hint->parent = hint2; |
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break; |
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} |
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} |
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} |
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if ( table->num_hints < table->max_hints ) |
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table->sort_global[table->num_hints++] = hint; |
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else |
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FT_ERROR(( "%s.activate: too many sorted hints! BUG!\n", |
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"ps.fitter" )); |
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} |
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static void |
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psh1_hint_table_record_mask( PSH1_Hint_Table table, |
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PS_Mask hint_mask ) |
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{ |
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FT_Int mask = 0, val = 0; |
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FT_Byte* cursor = hint_mask->bytes; |
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FT_UInt idx, limit; |
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limit = hint_mask->num_bits; |
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if ( limit != table->max_hints ) |
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FT_ERROR(( "%s.activate_mask: invalid bit count (%d instead of %d)\n", |
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"ps.fitter", hint_mask->num_bits, table->max_hints )); |
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for ( idx = 0; idx < limit; idx++ ) |
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{ |
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if ( mask == 0 ) |
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{ |
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val = *cursor++; |
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mask = 0x80; |
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} |
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if ( val & mask ) |
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psh1_hint_table_record( table, idx ); |
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mask >>= 1; |
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} |
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} |
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/* create hints table */ |
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static FT_Error |
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psh1_hint_table_init( PSH1_Hint_Table table, |
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PS_Hint_Table hints, |
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PS_Mask_Table hint_masks, |
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PS_Mask_Table counter_masks, |
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FT_Memory memory ) |
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{ |
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FT_UInt count = hints->num_hints; |
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FT_Error error; |
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FT_UNUSED( counter_masks ); |
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/* allocate our tables */ |
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if ( FT_NEW_ARRAY( table->sort, 2 * count ) || |
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FT_NEW_ARRAY( table->hints, count ) || |
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FT_NEW_ARRAY( table->zones, 2 * count + 1 ) ) |
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goto Exit; |
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table->max_hints = count; |
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table->sort_global = table->sort + count; |
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table->num_hints = 0; |
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table->num_zones = 0; |
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table->zone = 0; |
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/* now, initialize the "hints" array */ |
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{ |
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PSH1_Hint write = table->hints; |
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PS_Hint read = hints->hints; |
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for ( ; count > 0; count--, write++, read++ ) |
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{ |
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write->org_pos = read->pos; |
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write->org_len = read->len; |
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write->flags = read->flags; |
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} |
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} |
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/* we now need to determine the initial "parent" stems; first */ |
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/* activate the hints that are given by the initial hint masks */ |
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if ( hint_masks ) |
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{ |
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FT_UInt Count = hint_masks->num_masks; |
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PS_Mask Mask = hint_masks->masks; |
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table->hint_masks = hint_masks; |
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for ( ; Count > 0; Count--, Mask++ ) |
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psh1_hint_table_record_mask( table, Mask ); |
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} |
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/* now, do a linear parse in case some hints were left alone */ |
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if ( table->num_hints != table->max_hints ) |
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{ |
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FT_UInt Index, Count; |
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FT_ERROR(( "%s.init: missing/incorrect hint masks!\n" )); |
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Count = table->max_hints; |
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for ( Index = 0; Index < Count; Index++ ) |
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psh1_hint_table_record( table, Index ); |
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} |
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Exit: |
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return error; |
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} |
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static void |
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psh1_hint_table_activate_mask( PSH1_Hint_Table table, |
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PS_Mask hint_mask ) |
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{ |
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FT_Int mask = 0, val = 0; |
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FT_Byte* cursor = hint_mask->bytes; |
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FT_UInt idx, limit, count; |
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limit = hint_mask->num_bits; |
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count = 0; |
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psh1_hint_table_deactivate( table ); |
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for ( idx = 0; idx < limit; idx++ ) |
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{ |
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if ( mask == 0 ) |
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{ |
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val = *cursor++; |
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mask = 0x80; |
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} |
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if ( val & mask ) |
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{ |
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PSH1_Hint hint = &table->hints[idx]; |
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if ( !psh1_hint_is_active( hint ) ) |
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{ |
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PSH1_Hint* sort = table->sort; |
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FT_UInt count2; |
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PSH1_Hint hint2; |
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for ( count2 = count; count2 > 0; count2--, sort++ ) |
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{ |
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hint2 = sort[0]; |
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if ( psh1_hint_overlap( hint, hint2 ) ) |
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{ |
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FT_ERROR(( "%s.activate_mask: found overlapping hints\n", |
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"psf.hint" )); |
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break; |
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} |
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} |
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if ( count2 == 0 ) |
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{ |
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psh1_hint_activate( hint ); |
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if ( count < table->max_hints ) |
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table->sort[count++] = hint; |
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else |
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FT_ERROR(( "%s.activate_mask: too many active hints\n", |
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"psf.hint" )); |
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} |
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} |
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} |
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mask >>= 1; |
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} |
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table->num_hints = count; |
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/* now, sort the hints; they are guaranteed to not overlap */ |
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/* so we can compare their "org_pos" field directly */ |
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{ |
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FT_Int i1, i2; |
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PSH1_Hint hint1, hint2; |
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PSH1_Hint* sort = table->sort; |
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/* a simple bubble sort will do, since in 99% of cases, the hints */ |
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/* will be already sorted; and the sort will be linear */ |
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for ( i1 = 1; i1 < (FT_Int)count; i1++ ) |
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{ |
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hint1 = sort[i1]; |
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for ( i2 = i1 - 1; i2 >= 0; i2-- ) |
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{ |
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hint2 = sort[i2]; |
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if ( hint2->org_pos < hint1->org_pos ) |
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break; |
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sort[i2 + 1] = hint2; |
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sort[i2] = hint1; |
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} |
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} |
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} |
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} |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/***** *****/ |
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/***** HINTS GRID-FITTING AND OPTIMIZATION *****/ |
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/***** *****/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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#ifdef DEBUG_HINTER |
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void |
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ps_simple_scale( PSH1_Hint_Table table, |
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FT_Fixed scale, |
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FT_Fixed delta, |
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FT_Int vertical ) |
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{ |
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PSH1_Hint hint; |
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FT_UInt count; |
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for ( count = 0; count < table->num_hints; count++ ) |
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{ |
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hint = table->sort[count]; |
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if ( psh1_hint_is_active( hint ) ) |
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{ |
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hint->cur_pos = FT_MulFix( hint->org_pos, scale ) + delta; |
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hint->cur_len = FT_MulFix( hint->org_len, scale ); |
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if ( ps1_debug_hint_func ) |
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ps1_debug_hint_func( hint, vertical ); |
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} |
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} |
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} |
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#endif |
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FT_LOCAL_DEF( FT_Error ) |
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psh1_hint_table_optimize( PSH1_Hint_Table table, |
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PSH_Globals globals, |
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FT_Outline* outline, |
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FT_Int vertical ) |
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{ |
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PSH_Dimension dim = &globals->dimension[vertical]; |
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FT_Fixed scale = dim->scale_mult; |
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FT_Fixed delta = dim->scale_delta; |
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FT_UNUSED( outline ); |
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#ifdef DEBUG_HINTER |
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if ( ps_debug_no_vert_hints && vertical ) |
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{ |
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ps_simple_scale( table, scale, delta, vertical ); |
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return 0; |
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} |
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if ( ps_debug_no_horz_hints && !vertical ) |
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{ |
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ps_simple_scale( table, scale, delta, vertical ); |
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return 0; |
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} |
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#endif |
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/* XXXX: for now, we only scale the hints to test all other aspects */ |
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/* of the PostScript hinter */ |
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{ |
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PSH1_Hint hint; |
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FT_UInt count; |
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for ( count = 0; count < table->num_hints; count++ ) |
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{ |
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hint = table->sort[count]; |
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if ( psh1_hint_is_active( hint ) ) |
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{ |
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#if 1 |
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FT_Pos pos = FT_MulFix( hint->org_pos, scale ) + delta; |
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FT_Pos len = FT_MulFix( hint->org_len, scale ); |
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FT_Pos fit_center; |
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FT_Pos fit_len; |
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PSH_AlignmentRec align; |
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/* compute fitted width/height */ |
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fit_len = psh_dimension_snap_width( dim, hint->org_len ); |
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if ( fit_len < 64 ) |
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fit_len = 64; |
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else |
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fit_len = ( fit_len + 32 ) & -64; |
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hint->cur_len = fit_len; |
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/* check blue zones for horizontal stems */ |
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align.align = PSH_BLUE_ALIGN_NONE; |
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align.align_bot = align.align_top = 0; |
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if ( !vertical ) |
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{ |
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psh_blues_snap_stem( &globals->blues, |
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hint->org_pos + hint->org_len, |
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hint->org_pos, |
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&align ); |
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} |
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switch ( align.align ) |
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{ |
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case PSH_BLUE_ALIGN_TOP: |
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/* the top of the stem is aligned against a blue zone */ |
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hint->cur_pos = align.align_top - fit_len; |
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break; |
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case PSH_BLUE_ALIGN_BOT: |
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/* the bottom of the stem is aligned against a blue zone */ |
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hint->cur_pos = align.align_bot; |
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break; |
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case PSH_BLUE_ALIGN_TOP | PSH_BLUE_ALIGN_BOT: |
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/* both edges of the stem are aligned against blue zones */ |
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hint->cur_pos = align.align_bot; |
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hint->cur_len = align.align_top - align.align_bot; |
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break; |
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default: |
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/* normal processing */ |
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if ( ( fit_len / 64 ) & 1 ) |
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{ |
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/* odd number of pixels */ |
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fit_center = ( ( pos + ( len >> 1 ) ) & -64 ) + 32; |
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} |
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else |
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{ |
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/* even number of pixels */ |
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fit_center = ( pos + ( len >> 1 ) + 32 ) & -64; |
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} |
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hint->cur_pos = fit_center - ( fit_len >> 1 ); |
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} |
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# else |
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hint->cur_pos = ( FT_MulFix( hint->org_pos, scale ) + delta + 32 ) |
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& -64; |
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hint->cur_len = FT_MulFix( hint->org_len, scale ); |
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# endif |
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#ifdef DEBUG_HINTER |
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if ( ps1_debug_hint_func ) |
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ps1_debug_hint_func( hint, vertical ); |
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#endif |
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} |
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} |
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} |
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return 0; |
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} |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/***** *****/ |
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/***** POINTS INTERPOLATION ROUTINES *****/ |
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/***** *****/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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#define PSH1_ZONE_MIN -3200000 |
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#define PSH1_ZONE_MAX +3200000 |
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#define xxDEBUG_ZONES |
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#ifdef DEBUG_ZONES |
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#include <stdio.h> |
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static void |
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psh1_print_zone( PSH1_Zone zone ) |
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{ |
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printf( "zone [scale,delta,min,max] = [%.3f,%.3f,%d,%d]\n", |
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zone->scale / 65536.0, |
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zone->delta / 64.0, |
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zone->min, |
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zone->max ); |
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} |
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#else |
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#define psh1_print_zone( x ) do { } while ( 0 ) |
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#endif |
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/* setup interpolation zones once the hints have been grid-fitted */ |
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/* by the optimizer */ |
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static void |
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psh1_hint_table_setup_zones( PSH1_Hint_Table table, |
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FT_Fixed scale, |
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FT_Fixed delta ) |
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{ |
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FT_UInt count; |
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PSH1_Zone zone; |
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PSH1_Hint *sort, hint, hint2; |
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zone = table->zones; |
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/* special case, no hints defined */ |
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if ( table->num_hints == 0 ) |
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{ |
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zone->scale = scale; |
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zone->delta = delta; |
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zone->min = PSH1_ZONE_MIN; |
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zone->max = PSH1_ZONE_MAX; |
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table->num_zones = 1; |
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table->zone = zone; |
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return; |
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} |
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/* the first zone is before the first hint */ |
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/* x' = (x-x0)*s + x0' = x*s + ( x0' - x0*s ) */ |
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sort = table->sort; |
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hint = sort[0]; |
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zone->scale = scale; |
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zone->delta = hint->cur_pos - FT_MulFix( hint->org_pos, scale ); |
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zone->min = PSH1_ZONE_MIN; |
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zone->max = hint->org_pos; |
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psh1_print_zone( zone ); |
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zone++; |
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for ( count = table->num_hints; count > 0; count-- ) |
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{ |
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FT_Fixed scale2; |
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if ( hint->org_len > 0 ) |
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{ |
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/* setup a zone for inner-stem interpolation */ |
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/* (x' - x0') = (x - x0)*(x1'-x0')/(x1-x0) */ |
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/* x' = x*s2 + x0' - x0*s2 */ |
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scale2 = FT_DivFix( hint->cur_len, hint->org_len ); |
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zone->scale = scale2; |
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zone->min = hint->org_pos; |
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zone->max = hint->org_pos + hint->org_len; |
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zone->delta = hint->cur_pos - FT_MulFix( zone->min, scale2 ); |
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psh1_print_zone( zone ); |
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zone++; |
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} |
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if ( count == 1 ) |
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break; |
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sort++; |
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hint2 = sort[0]; |
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/* setup zone for inter-stem interpolation */ |
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/* (x'-x1') = (x-x1)*(x2'-x1')/(x2-x1) */ |
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/* x' = x*s3 + x1' - x1*s3 */ |
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scale2 = FT_DivFix( hint2->cur_pos - (hint->cur_pos + hint->cur_len), |
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hint2->org_pos - (hint->org_pos + hint->org_len) ); |
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zone->scale = scale2; |
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zone->min = hint->org_pos + hint->org_len; |
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zone->max = hint2->org_pos; |
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zone->delta = hint->cur_pos + hint->cur_len - |
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FT_MulFix( zone->min, scale2 ); |
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psh1_print_zone( zone ); |
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zone++; |
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hint = hint2; |
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} |
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|
||||
/* the last zone */ |
||||
zone->scale = scale; |
||||
zone->min = hint->org_pos + hint->org_len; |
||||
zone->max = PSH1_ZONE_MAX; |
||||
zone->delta = hint->cur_pos + hint->cur_len - |
||||
FT_MulFix( zone->min, scale ); |
||||
|
||||
psh1_print_zone( zone ); |
||||
|
||||
zone++; |
||||
|
||||
table->num_zones = zone - table->zones; |
||||
table->zone = table->zones; |
||||
} |
||||
|
||||
|
||||
/* tune a single coordinate with the current interpolation zones */ |
||||
static FT_Pos |
||||
psh1_hint_table_tune_coord( PSH1_Hint_Table table, |
||||
FT_Int coord ) |
||||
{ |
||||
PSH1_Zone zone; |
||||
|
||||
|
||||
zone = table->zone; |
||||
|
||||
if ( coord < zone->min ) |
||||
{ |
||||
do |
||||
{ |
||||
if ( zone == table->zones ) |
||||
break; |
||||
|
||||
zone--; |
||||
|
||||
} while ( coord < zone->min ); |
||||
table->zone = zone; |
||||
} |
||||
else if ( coord > zone->max ) |
||||
{ |
||||
do |
||||
{ |
||||
if ( zone == table->zones + table->num_zones - 1 ) |
||||
break; |
||||
|
||||
zone++; |
||||
|
||||
} while ( coord > zone->max ); |
||||
table->zone = zone; |
||||
} |
||||
|
||||
return FT_MulFix( coord, zone->scale ) + zone->delta; |
||||
} |
||||
|
||||
|
||||
/* tune a given outline with current interpolation zones. */ |
||||
/* The function only works in a single dimension. */ |
||||
static void |
||||
psh1_hint_table_tune_outline( PSH1_Hint_Table table, |
||||
FT_Outline* outline, |
||||
PSH_Globals globals, |
||||
FT_Int vertical ) |
||||
|
||||
{ |
||||
FT_UInt count, first, last; |
||||
PS_Mask_Table hint_masks = table->hint_masks; |
||||
PS_Mask mask; |
||||
PSH_Dimension dim = &globals->dimension[vertical]; |
||||
FT_Fixed scale = dim->scale_mult; |
||||
FT_Fixed delta = dim->scale_delta; |
||||
|
||||
|
||||
if ( hint_masks && hint_masks->num_masks > 0 ) |
||||
{ |
||||
first = 0; |
||||
mask = hint_masks->masks; |
||||
count = hint_masks->num_masks; |
||||
|
||||
for ( ; count > 0; count--, mask++ ) |
||||
{ |
||||
last = mask->end_point; |
||||
|
||||
if ( last > first ) |
||||
{ |
||||
FT_Vector* vec; |
||||
FT_Int count2; |
||||
|
||||
|
||||
psh1_hint_table_activate_mask( table, mask ); |
||||
psh1_hint_table_optimize( table, globals, outline, vertical ); |
||||
psh1_hint_table_setup_zones( table, scale, delta ); |
||||
last = mask->end_point; |
||||
|
||||
vec = outline->points + first; |
||||
count2 = last - first; |
||||
|
||||
for ( ; count2 > 0; count2--, vec++ ) |
||||
{ |
||||
FT_Pos x, *px; |
||||
|
||||
|
||||
px = vertical ? &vec->x : &vec->y; |
||||
x = *px; |
||||
|
||||
*px = psh1_hint_table_tune_coord( table, (FT_Int)x ); |
||||
} |
||||
} |
||||
|
||||
first = last; |
||||
} |
||||
} |
||||
else /* no hints in this glyph, simply scale the outline */ |
||||
{ |
||||
FT_Vector* vec; |
||||
|
||||
|
||||
vec = outline->points; |
||||
count = outline->n_points; |
||||
|
||||
if ( vertical ) |
||||
{ |
||||
for ( ; count > 0; count--, vec++ ) |
||||
vec->x = FT_MulFix( vec->x, scale ) + delta; |
||||
} |
||||
else |
||||
{ |
||||
for ( ; count > 0; count--, vec++ ) |
||||
vec->y = FT_MulFix( vec->y, scale ) + delta; |
||||
} |
||||
} |
||||
} |
||||
|
||||
|
||||
/*************************************************************************/ |
||||
/*************************************************************************/ |
||||
/***** *****/ |
||||
/***** HIGH-LEVEL INTERFACE *****/ |
||||
/***** *****/ |
||||
/*************************************************************************/ |
||||
/*************************************************************************/ |
||||
|
||||
FT_Error |
||||
ps1_hints_apply( PS_Hints ps_hints, |
||||
FT_Outline* outline, |
||||
PSH_Globals globals, |
||||
FT_Render_Mode hint_mode ) |
||||
{ |
||||
PSH1_Hint_TableRec hints; |
||||
FT_Error error = 0; |
||||
FT_Int dimension; |
||||
|
||||
|
||||
FT_UNUSED( hint_mode ); |
||||
|
||||
for ( dimension = 1; dimension >= 0; dimension-- ) |
||||
{ |
||||
PS_Dimension dim = &ps_hints->dimension[dimension]; |
||||
|
||||
|
||||
/* initialize hints table */ |
||||
FT_MEM_ZERO( &hints, sizeof ( hints ) ); |
||||
error = psh1_hint_table_init( &hints, |
||||
&dim->hints, |
||||
&dim->masks, |
||||
&dim->counters, |
||||
ps_hints->memory ); |
||||
if ( error ) |
||||
goto Exit; |
||||
|
||||
psh1_hint_table_tune_outline( &hints, |
||||
outline, |
||||
globals, |
||||
dimension ); |
||||
|
||||
psh1_hint_table_done( &hints, ps_hints->memory ); |
||||
} |
||||
|
||||
Exit: |
||||
return error; |
||||
} |
||||
|
||||
|
||||
/* END */ |
||||
@ -1,110 +0,0 @@ |
||||
/***************************************************************************/ |
||||
/* */ |
||||
/* pshalgo1.h */ |
||||
/* */ |
||||
/* PostScript hinting algorithm 1 (specification). */ |
||||
/* */ |
||||
/* Copyright 2001 by */ |
||||
/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
||||
/* */ |
||||
/* This file is part of the FreeType project, and may only be used, */ |
||||
/* modified, and distributed under the terms of the FreeType project */ |
||||
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
||||
/* this file you indicate that you have read the license and */ |
||||
/* understand and accept it fully. */ |
||||
/* */ |
||||
/***************************************************************************/ |
||||
|
||||
|
||||
#ifndef __PSHALGO1_H__ |
||||
#define __PSHALGO1_H__ |
||||
|
||||
#include "pshrec.h" |
||||
|
||||
FT_BEGIN_HEADER |
||||
|
||||
typedef struct PSH1_HintRec_* PSH1_Hint; |
||||
|
||||
typedef enum |
||||
{ |
||||
PSH1_HINT_FLAG_GHOST = PS_HINT_FLAG_GHOST, |
||||
PSH1_HINT_FLAG_BOTTOM = PS_HINT_FLAG_BOTTOM, |
||||
PSH1_HINT_FLAG_ACTIVE = 4 |
||||
|
||||
} PSH1_Hint_Flags; |
||||
|
||||
#define psh1_hint_is_active( x ) \ |
||||
( ( (x)->flags & PSH1_HINT_FLAG_ACTIVE ) != 0 ) |
||||
#define psh1_hint_is_ghost( x ) \ |
||||
( ( (x)->flags & PSH1_HINT_FLAG_GHOST ) != 0 ) |
||||
|
||||
#define psh1_hint_activate( x ) (x)->flags |= PSH1_HINT_FLAG_ACTIVE |
||||
#define psh1_hint_deactivate( x ) (x)->flags &= ~PSH1_HINT_FLAG_ACTIVE |
||||
|
||||
typedef struct PSH1_HintRec_ |
||||
{ |
||||
FT_Int org_pos; |
||||
FT_Int org_len; |
||||
FT_Pos cur_pos; |
||||
FT_Pos cur_len; |
||||
|
||||
FT_UInt flags; |
||||
|
||||
PSH1_Hint parent; |
||||
FT_Int order; |
||||
|
||||
} PSH1_HintRec; |
||||
|
||||
|
||||
/* this is an interpolation zone used for strong points; */ |
||||
/* weak points are interpolated according to their strong */ |
||||
/* neighbours */ |
||||
typedef struct PSH1_ZoneRec_ |
||||
{ |
||||
FT_Fixed scale; |
||||
FT_Fixed delta; |
||||
FT_Pos min; |
||||
FT_Pos max; |
||||
|
||||
} PSH1_ZoneRec, *PSH1_Zone; |
||||
|
||||
|
||||
typedef struct PSH1_Hint_TableRec_ |
||||
{ |
||||
FT_UInt max_hints; |
||||
FT_UInt num_hints; |
||||
PSH1_Hint hints; |
||||
PSH1_Hint* sort; |
||||
PSH1_Hint* sort_global; |
||||
FT_UInt num_zones; |
||||
PSH1_Zone zones; |
||||
PSH1_Zone zone; |
||||
PS_Mask_Table hint_masks; |
||||
PS_Mask_Table counter_masks; |
||||
|
||||
} PSH1_Hint_TableRec, *PSH1_Hint_Table; |
||||
|
||||
|
||||
extern FT_Error |
||||
ps1_hints_apply( PS_Hints ps_hints, |
||||
FT_Outline* outline, |
||||
PSH_Globals globals, |
||||
FT_Render_Mode hint_mode ); |
||||
|
||||
|
||||
#ifdef DEBUG_HINTER |
||||
extern PSH1_Hint_Table ps1_debug_hint_table; |
||||
|
||||
typedef void |
||||
(*PSH1_HintFunc)( PSH1_Hint hint, |
||||
FT_Bool vertical ); |
||||
|
||||
extern PSH1_HintFunc ps1_debug_hint_func; |
||||
#endif |
||||
|
||||
FT_END_HEADER |
||||
|
||||
#endif /* __PSHALGO1_H__ */ |
||||
|
||||
|
||||
/* END */ |
||||
File diff suppressed because it is too large
Load Diff
@ -1,203 +0,0 @@ |
||||
/***************************************************************************/ |
||||
/* */ |
||||
/* pshalgo2.h */ |
||||
/* */ |
||||
/* PostScript hinting algorithm 2 (specification). */ |
||||
/* */ |
||||
/* Copyright 2001 by */ |
||||
/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
||||
/* */ |
||||
/* This file is part of the FreeType project, and may only be used, */ |
||||
/* modified, and distributed under the terms of the FreeType project */ |
||||
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
||||
/* this file you indicate that you have read the license and */ |
||||
/* understand and accept it fully. */ |
||||
/* */ |
||||
/***************************************************************************/ |
||||
|
||||
|
||||
#ifndef __PSHALGO2_H__ |
||||
#define __PSHALGO2_H__ |
||||
|
||||
|
||||
#include "pshrec.h" |
||||
#include "pshglob.h" |
||||
#include FT_TRIGONOMETRY_H |
||||
|
||||
|
||||
FT_BEGIN_HEADER |
||||
|
||||
|
||||
typedef struct PSH2_HintRec_* PSH2_Hint; |
||||
|
||||
typedef enum |
||||
{ |
||||
PSH2_HINT_GHOST = PS_HINT_FLAG_GHOST, |
||||
PSH2_HINT_BOTTOM = PS_HINT_FLAG_BOTTOM, |
||||
PSH2_HINT_ACTIVE = 4, |
||||
PSH2_HINT_FITTED = 8 |
||||
|
||||
} PSH2_Hint_Flags; |
||||
|
||||
|
||||
#define psh2_hint_is_active( x ) ( ( (x)->flags & PSH2_HINT_ACTIVE ) != 0 ) |
||||
#define psh2_hint_is_ghost( x ) ( ( (x)->flags & PSH2_HINT_GHOST ) != 0 ) |
||||
#define psh2_hint_is_fitted( x ) ( ( (x)->flags & PSH2_HINT_FITTED ) != 0 ) |
||||
|
||||
#define psh2_hint_activate( x ) (x)->flags |= PSH2_HINT_ACTIVE |
||||
#define psh2_hint_deactivate( x ) (x)->flags &= ~PSH2_HINT_ACTIVE |
||||
#define psh2_hint_set_fitted( x ) (x)->flags |= PSH2_HINT_FITTED |
||||
|
||||
|
||||
typedef struct PSH2_HintRec_ |
||||
{ |
||||
FT_Int org_pos; |
||||
FT_Int org_len; |
||||
FT_Pos cur_pos; |
||||
FT_Pos cur_len; |
||||
FT_UInt flags; |
||||
PSH2_Hint parent; |
||||
FT_Int order; |
||||
|
||||
} PSH2_HintRec; |
||||
|
||||
|
||||
/* this is an interpolation zone used for strong points; */ |
||||
/* weak points are interpolated according to their strong */ |
||||
/* neighbours */ |
||||
typedef struct PSH2_ZoneRec_ |
||||
{ |
||||
FT_Fixed scale; |
||||
FT_Fixed delta; |
||||
FT_Pos min; |
||||
FT_Pos max; |
||||
|
||||
} PSH2_ZoneRec, *PSH2_Zone; |
||||
|
||||
|
||||
typedef struct PSH2_Hint_TableRec_ |
||||
{ |
||||
FT_UInt max_hints; |
||||
FT_UInt num_hints; |
||||
PSH2_Hint hints; |
||||
PSH2_Hint* sort; |
||||
PSH2_Hint* sort_global; |
||||
FT_UInt num_zones; |
||||
PSH2_Zone zones; |
||||
PSH2_Zone zone; |
||||
PS_Mask_Table hint_masks; |
||||
PS_Mask_Table counter_masks; |
||||
|
||||
} PSH2_Hint_TableRec, *PSH2_Hint_Table; |
||||
|
||||
|
||||
typedef struct PSH2_PointRec_* PSH2_Point; |
||||
typedef struct PSH2_ContourRec_* PSH2_Contour; |
||||
|
||||
enum |
||||
{ |
||||
PSH2_DIR_NONE = 4, |
||||
PSH2_DIR_UP = 1, |
||||
PSH2_DIR_DOWN = -1, |
||||
PSH2_DIR_LEFT = -2, |
||||
PSH2_DIR_RIGHT = 2 |
||||
}; |
||||
|
||||
enum |
||||
{ |
||||
PSH2_POINT_OFF = 1, /* point is off the curve */ |
||||
PSH2_POINT_STRONG = 2, /* point is strong */ |
||||
PSH2_POINT_SMOOTH = 4, /* point is smooth */ |
||||
PSH2_POINT_FITTED = 8 /* point is already fitted */ |
||||
}; |
||||
|
||||
|
||||
typedef struct PSH2_PointRec_ |
||||
{ |
||||
PSH2_Point prev; |
||||
PSH2_Point next; |
||||
PSH2_Contour contour; |
||||
FT_UInt flags; |
||||
FT_Char dir_in; |
||||
FT_Char dir_out; |
||||
FT_Angle angle_in; |
||||
FT_Angle angle_out; |
||||
PSH2_Hint hint; |
||||
FT_Pos org_u; |
||||
FT_Pos cur_u; |
||||
#ifdef DEBUG_HINTER |
||||
FT_Pos org_x; |
||||
FT_Pos cur_x; |
||||
FT_Pos org_y; |
||||
FT_Pos cur_y; |
||||
FT_UInt flags_x; |
||||
FT_UInt flags_y; |
||||
#endif |
||||
|
||||
} PSH2_PointRec; |
||||
|
||||
|
||||
#define psh2_point_is_strong( p ) ( (p)->flags & PSH2_POINT_STRONG ) |
||||
#define psh2_point_is_fitted( p ) ( (p)->flags & PSH2_POINT_FITTED ) |
||||
#define psh2_point_is_smooth( p ) ( (p)->flags & PSH2_POINT_SMOOTH ) |
||||
|
||||
#define psh2_point_set_strong( p ) (p)->flags |= PSH2_POINT_STRONG |
||||
#define psh2_point_set_fitted( p ) (p)->flags |= PSH2_POINT_FITTED |
||||
#define psh2_point_set_smooth( p ) (p)->flags |= PSH2_POINT_SMOOTH |
||||
|
||||
|
||||
typedef struct PSH2_ContourRec_ |
||||
{ |
||||
PSH2_Point start; |
||||
FT_UInt count; |
||||
|
||||
} PSH2_ContourRec; |
||||
|
||||
|
||||
typedef struct PSH2_GlyphRec_ |
||||
{ |
||||
FT_UInt num_points; |
||||
FT_UInt num_contours; |
||||
|
||||
PSH2_Point points; |
||||
PSH2_Contour contours; |
||||
|
||||
FT_Memory memory; |
||||
FT_Outline* outline; |
||||
PSH_Globals globals; |
||||
PSH2_Hint_TableRec hint_tables[2]; |
||||
|
||||
FT_Bool vertical; |
||||
FT_Int major_dir; |
||||
FT_Int minor_dir; |
||||
|
||||
} PSH2_GlyphRec, *PSH2_Glyph; |
||||
|
||||
|
||||
#ifdef DEBUG_HINTER |
||||
extern PSH2_Hint_Table ps2_debug_hint_table; |
||||
|
||||
typedef void |
||||
(*PSH2_HintFunc)( PSH2_Hint hint, |
||||
FT_Bool vertical ); |
||||
|
||||
extern PSH2_HintFunc ps2_debug_hint_func; |
||||
|
||||
extern PSH2_Glyph ps2_debug_glyph; |
||||
#endif |
||||
|
||||
|
||||
extern FT_Error |
||||
ps2_hints_apply( PS_Hints ps_hints, |
||||
FT_Outline* outline, |
||||
PSH_Globals globals, |
||||
FT_Render_Mode hint_mode ); |
||||
|
||||
|
||||
FT_END_HEADER |
||||
|
||||
|
||||
#endif /* __PSHALGO2_H__ */ |
||||
|
||||
|
||||
/* END */ |
||||
@ -1,255 +0,0 @@ |
||||
/***************************************************************************/ |
||||
/* */ |
||||
/* pshalgo3.h */ |
||||
/* */ |
||||
/* PostScript hinting algorithm 3 (specification). */ |
||||
/* */ |
||||
/* Copyright 2001, 2002 by */ |
||||
/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
||||
/* */ |
||||
/* This file is part of the FreeType project, and may only be used, */ |
||||
/* modified, and distributed under the terms of the FreeType project */ |
||||
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
||||
/* this file you indicate that you have read the license and */ |
||||
/* understand and accept it fully. */ |
||||
/* */ |
||||
/***************************************************************************/ |
||||
|
||||
|
||||
#ifndef __PSHALGO3_H__ |
||||
#define __PSHALGO3_H__ |
||||
|
||||
|
||||
#include "pshrec.h" |
||||
#include "pshglob.h" |
||||
#include FT_TRIGONOMETRY_H |
||||
|
||||
|
||||
FT_BEGIN_HEADER |
||||
|
||||
|
||||
/* handle to Hint structure */ |
||||
typedef struct PSH3_HintRec_* PSH3_Hint; |
||||
|
||||
/* hint bit-flags */ |
||||
typedef enum |
||||
{ |
||||
PSH3_HINT_GHOST = PS_HINT_FLAG_GHOST, |
||||
PSH3_HINT_BOTTOM = PS_HINT_FLAG_BOTTOM, |
||||
PSH3_HINT_ACTIVE = 4, |
||||
PSH3_HINT_FITTED = 8 |
||||
|
||||
} PSH3_Hint_Flags; |
||||
|
||||
|
||||
#define psh3_hint_is_active( x ) ( ( (x)->flags & PSH3_HINT_ACTIVE ) != 0 ) |
||||
#define psh3_hint_is_ghost( x ) ( ( (x)->flags & PSH3_HINT_GHOST ) != 0 ) |
||||
#define psh3_hint_is_fitted( x ) ( ( (x)->flags & PSH3_HINT_FITTED ) != 0 ) |
||||
|
||||
#define psh3_hint_activate( x ) (x)->flags |= PSH3_HINT_ACTIVE |
||||
#define psh3_hint_deactivate( x ) (x)->flags &= ~PSH3_HINT_ACTIVE |
||||
#define psh3_hint_set_fitted( x ) (x)->flags |= PSH3_HINT_FITTED |
||||
|
||||
/* hint structure */ |
||||
typedef struct PSH3_HintRec_ |
||||
{ |
||||
FT_Int org_pos; |
||||
FT_Int org_len; |
||||
FT_Pos cur_pos; |
||||
FT_Pos cur_len; |
||||
FT_UInt flags; |
||||
PSH3_Hint parent; |
||||
FT_Int order; |
||||
|
||||
} PSH3_HintRec; |
||||
|
||||
|
||||
/* this is an interpolation zone used for strong points; */ |
||||
/* weak points are interpolated according to their strong */ |
||||
/* neighbours */ |
||||
typedef struct PSH3_ZoneRec_ |
||||
{ |
||||
FT_Fixed scale; |
||||
FT_Fixed delta; |
||||
FT_Pos min; |
||||
FT_Pos max; |
||||
|
||||
} PSH3_ZoneRec, *PSH3_Zone; |
||||
|
||||
|
||||
typedef struct PSH3_Hint_TableRec_ |
||||
{ |
||||
FT_UInt max_hints; |
||||
FT_UInt num_hints; |
||||
PSH3_Hint hints; |
||||
PSH3_Hint* sort; |
||||
PSH3_Hint* sort_global; |
||||
FT_UInt num_zones; |
||||
PSH3_ZoneRec* zones; |
||||
PSH3_Zone zone; |
||||
PS_Mask_Table hint_masks; |
||||
PS_Mask_Table counter_masks; |
||||
|
||||
} PSH3_Hint_TableRec, *PSH3_Hint_Table; |
||||
|
||||
|
||||
typedef struct PSH3_PointRec_* PSH3_Point; |
||||
typedef struct PSH3_ContourRec_* PSH3_Contour; |
||||
|
||||
enum |
||||
{ |
||||
PSH3_DIR_NONE = 4, |
||||
PSH3_DIR_UP = -1, |
||||
PSH3_DIR_DOWN = 1, |
||||
PSH3_DIR_LEFT = -2, |
||||
PSH3_DIR_RIGHT = 2 |
||||
}; |
||||
|
||||
#define PSH3_DIR_HORIZONTAL 2 |
||||
#define PSH3_DIR_VERTICAL 1 |
||||
|
||||
#define PSH3_DIR_COMPARE( d1, d2 ) ( (d1) == (d2) || (d1) == -(d2) ) |
||||
#define PSH3_DIR_IS_HORIZONTAL( d ) PSH3_DIR_COMPARE( d, PSH3_DIR_HORIZONTAL ) |
||||
#define PSH3_DIR_IS_VERTICAL( d ) PSH3_DIR_COMPARE( d, PSH3_DIR_VERTICAL ) |
||||
|
||||
|
||||
/* the following bit-flags are computed once by the glyph */ |
||||
/* analyzer, for both dimensions */ |
||||
enum |
||||
{ |
||||
PSH3_POINT_OFF = 1, /* point is off the curve */ |
||||
PSH3_POINT_SMOOTH = 2, /* point is smooth */ |
||||
PSH3_POINT_INFLEX = 4 /* point is inflection */ |
||||
}; |
||||
|
||||
#define psh3_point_is_smooth( p ) ( (p)->flags & PSH3_POINT_SMOOTH ) |
||||
#define psh3_point_is_off( p ) ( (p)->flags & PSH3_POINT_OFF ) |
||||
#define psh3_point_is_inflex( p ) ( (p)->flags & PSH3_POINT_INFLEX ) |
||||
|
||||
#define psh3_point_set_smooth( p ) (p)->flags |= PSH3_POINT_SMOOTH |
||||
#define psh3_point_set_off( p ) (p)->flags |= PSH3_POINT_OFF |
||||
#define psh3_point_set_inflex( p ) (p)->flags |= PSH3_POINT_INFLEX |
||||
|
||||
/* the following bit-flags are re-computed for each dimension */ |
||||
enum |
||||
{ |
||||
PSH3_POINT_STRONG = 16, /* point is strong */ |
||||
PSH3_POINT_FITTED = 32, /* point is already fitted */ |
||||
PSH3_POINT_EXTREMUM = 64, /* point is local extremum */ |
||||
PSH3_POINT_POSITIVE = 128, /* extremum has positive contour flow */ |
||||
PSH3_POINT_NEGATIVE = 256, /* extremum has negative contour flow */ |
||||
PSH3_POINT_EDGE_MIN = 512, /* point is aligned to left/bottom stem edge */ |
||||
PSH3_POINT_EDGE_MAX = 1024 /* point is aligned to top/right stem edge */ |
||||
}; |
||||
|
||||
#define psh3_point_is_strong( p ) ( (p)->flags2 & PSH3_POINT_STRONG ) |
||||
#define psh3_point_is_fitted( p ) ( (p)->flags2 & PSH3_POINT_FITTED ) |
||||
#define psh3_point_is_extremum( p ) ( (p)->flags2 & PSH3_POINT_EXTREMUM ) |
||||
#define psh3_point_is_positive( p ) ( (p)->flags2 & PSH3_POINT_POSITIVE ) |
||||
#define psh3_point_is_negative( p ) ( (p)->flags2 & PSH3_POINT_NEGATIVE ) |
||||
#define psh3_point_is_edge_min( p ) ( (p)->flags2 & PSH3_POINT_EDGE_MIN ) |
||||
#define psh3_point_is_edge_max( p ) ( (p)->flags2 & PSH3_POINT_EDGE_MAX ) |
||||
|
||||
#define psh3_point_set_strong( p ) (p)->flags2 |= PSH3_POINT_STRONG |
||||
#define psh3_point_set_fitted( p ) (p)->flags2 |= PSH3_POINT_FITTED |
||||
#define psh3_point_set_extremum( p ) (p)->flags2 |= PSH3_POINT_EXTREMUM |
||||
#define psh3_point_set_positive( p ) (p)->flags2 |= PSH3_POINT_POSITIVE |
||||
#define psh3_point_set_negative( p ) (p)->flags2 |= PSH3_POINT_NEGATIVE |
||||
#define psh3_point_set_edge_min( p ) (p)->flags2 |= PSH3_POINT_EDGE_MIN |
||||
#define psh3_point_set_edge_max( p ) (p)->flags2 |= PSH3_POINT_EDGE_MAX |
||||
|
||||
|
||||
typedef struct PSH3_PointRec_ |
||||
{ |
||||
PSH3_Point prev; |
||||
PSH3_Point next; |
||||
PSH3_Contour contour; |
||||
FT_UInt flags; |
||||
FT_UInt flags2; |
||||
FT_Char dir_in; |
||||
FT_Char dir_out; |
||||
FT_Angle angle_in; |
||||
FT_Angle angle_out; |
||||
PSH3_Hint hint; |
||||
FT_Pos org_u; |
||||
FT_Pos org_v; |
||||
FT_Pos cur_u; |
||||
#ifdef DEBUG_HINTER |
||||
FT_Pos org_x; |
||||
FT_Pos cur_x; |
||||
FT_Pos org_y; |
||||
FT_Pos cur_y; |
||||
FT_UInt flags_x; |
||||
FT_UInt flags_y; |
||||
#endif |
||||
|
||||
} PSH3_PointRec; |
||||
|
||||
|
||||
#define PSH3_POINT_EQUAL_ORG( a, b ) ( (a)->org_u == (b)->org_u && \ |
||||
(a)->org_v == (b)->org_v ) |
||||
|
||||
#define PSH3_POINT_ANGLE( a, b ) FT_Atan2( (b)->org_u - (a)->org_u, \ |
||||
(b)->org_v - (a)->org_v ) |
||||
|
||||
typedef struct PSH3_ContourRec_ |
||||
{ |
||||
PSH3_Point start; |
||||
FT_UInt count; |
||||
|
||||
} PSH3_ContourRec; |
||||
|
||||
|
||||
typedef struct PSH3_GlyphRec_ |
||||
{ |
||||
FT_UInt num_points; |
||||
FT_UInt num_contours; |
||||
|
||||
PSH3_Point points; |
||||
PSH3_Contour contours; |
||||
|
||||
FT_Memory memory; |
||||
FT_Outline* outline; |
||||
PSH_Globals globals; |
||||
PSH3_Hint_TableRec hint_tables[2]; |
||||
|
||||
FT_Bool vertical; |
||||
FT_Int major_dir; |
||||
FT_Int minor_dir; |
||||
|
||||
FT_Bool do_horz_hints; |
||||
FT_Bool do_vert_hints; |
||||
FT_Bool do_horz_snapping; |
||||
FT_Bool do_vert_snapping; |
||||
FT_Bool do_stem_adjust; |
||||
|
||||
} PSH3_GlyphRec, *PSH3_Glyph; |
||||
|
||||
|
||||
#ifdef DEBUG_HINTER |
||||
extern PSH3_Hint_Table ps3_debug_hint_table; |
||||
|
||||
typedef void |
||||
(*PSH3_HintFunc)( PSH3_Hint hint, |
||||
FT_Bool vertical ); |
||||
|
||||
extern PSH3_HintFunc ps3_debug_hint_func; |
||||
|
||||
extern PSH3_Glyph ps3_debug_glyph; |
||||
#endif |
||||
|
||||
|
||||
extern FT_Error |
||||
ps3_hints_apply( PS_Hints ps_hints, |
||||
FT_Outline* outline, |
||||
PSH_Globals globals, |
||||
FT_Render_Mode hint_mode ); |
||||
|
||||
|
||||
FT_END_HEADER |
||||
|
||||
|
||||
#endif /* __PSHALGO3_H__ */ |
||||
|
||||
|
||||
/* END */ |
||||
Loading…
Reference in new issue