So. Some themes have objects that seem to be large natural extensions of the landscape. Masks allow maintaining that. Lemme know if it doesn't look good. If it doesn't, can still use for ice/bounce/indestructible. Indestructible bunker object for example.
/***************************************************************************/
/* */
/* pshglob.c */
/* */
/* PostScript hinter global hinting management (body). */
/* Inspired by the new auto-hinter module. */
/* */
/* Copyright 2001, 2002, 2003, 2004, 2006, 2010 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. */
/* */
/***************************************************************************/
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_INTERNAL_OBJECTS_H
#include "pshglob.h"
#ifdef DEBUG_HINTER
PSH_Globals ps_debug_globals = 0;
#endif
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** STANDARD WIDTHS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/* scale the widths/heights table */
static void
psh_globals_scale_widths( PSH_Globals globals,
FT_UInt direction )
{
PSH_Dimension dim = &globals->dimension[direction];
PSH_Widths stdw = &dim->stdw;
FT_UInt count = stdw->count;
PSH_Width width = stdw->widths;
PSH_Width stand = width; /* standard width/height */
FT_Fixed scale = dim->scale_mult;
if ( count > 0 )
{
width->cur = FT_MulFix( width->org, scale );
width->fit = FT_PIX_ROUND( width->cur );
width++;
count--;
for ( ; count > 0; count--, width++ )
{
FT_Pos w, dist;
w = FT_MulFix( width->org, scale );
dist = w - stand->cur;
if ( dist < 0 )
dist = -dist;
if ( dist < 128 )
w = stand->cur;
width->cur = w;
width->fit = FT_PIX_ROUND( w );
}
}
}
#if 0
/* org_width is is font units, result in device pixels, 26.6 format */
FT_LOCAL_DEF( FT_Pos )
psh_dimension_snap_width( PSH_Dimension dimension,
FT_Int org_width )
{
FT_UInt n;
FT_Pos width = FT_MulFix( org_width, dimension->scale_mult );
FT_Pos best = 64 + 32 + 2;
FT_Pos reference = width;
for ( n = 0; n < dimension->stdw.count; n++ )
{
FT_Pos w;
FT_Pos dist;
w = dimension->stdw.widths[n].cur;
dist = width - w;
if ( dist < 0 )
dist = -dist;
if ( dist < best )
{
best = dist;
reference = w;
}
}
if ( width >= reference )
{
width -= 0x21;
if ( width < reference )
width = reference;
}
else
{
width += 0x21;
if ( width > reference )
width = reference;
}
return width;
}
#endif /* 0 */
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** BLUE ZONES *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
static void
psh_blues_set_zones_0( PSH_Blues target,
FT_Bool is_others,
FT_UInt read_count,
FT_Short* read,
PSH_Blue_Table top_table,
PSH_Blue_Table bot_table )
{
FT_UInt count_top = top_table->count;
FT_UInt count_bot = bot_table->count;
FT_Bool first = 1;
FT_UNUSED( target );
for ( ; read_count > 1; read_count -= 2 )
{
FT_Int reference, delta;
FT_UInt count;
PSH_Blue_Zone zones, zone;
FT_Bool top;
/* read blue zone entry, and select target top/bottom zone */
top = 0;
if ( first || is_others )
{
reference = read[1];
delta = read[0] - reference;
zones = bot_table->zones;
count = count_bot;
first = 0;
}
else
{
reference = read[0];
delta = read[1] - reference;
zones = top_table->zones;
count = count_top;
top = 1;
}
/* insert into sorted table */
zone = zones;
for ( ; count > 0; count--, zone++ )
{
if ( reference < zone->org_ref )
break;
if ( reference == zone->org_ref )
{
FT_Int delta0 = zone->org_delta;
/* we have two zones on the same reference position -- */
/* only keep the largest one */
if ( delta < 0 )
{
if ( delta < delta0 )
zone->org_delta = delta;
}
else
{
if ( delta > delta0 )
zone->org_delta = delta;
}
goto Skip;
}
}
for ( ; count > 0; count-- )
zone[count] = zone[count-1];
zone->org_ref = reference;
zone->org_delta = delta;
if ( top )
count_top++;
else
count_bot++;
Skip:
read += 2;
}
top_table->count = count_top;
bot_table->count = count_bot;
}
/* Re-read blue zones from the original fonts and store them into out */
/* private structure. This function re-orders, sanitizes and */
/* fuzz-expands the zones as well. */
static void
psh_blues_set_zones( PSH_Blues target,
FT_UInt count,
FT_Short* blues,
FT_UInt count_others,
FT_Short* other_blues,
FT_Int fuzz,
FT_Int family )
{
PSH_Blue_Table top_table, bot_table;
FT_Int count_top, count_bot;
if ( family )
{
top_table = &target->family_top;
bot_table = &target->family_bottom;
}
else
{
top_table = &target->normal_top;
bot_table = &target->normal_bottom;
}
/* read the input blue zones, and build two sorted tables */
/* (one for the top zones, the other for the bottom zones) */
top_table->count = 0;
bot_table->count = 0;
/* first, the blues */
psh_blues_set_zones_0( target, 0,
count, blues, top_table, bot_table );
psh_blues_set_zones_0( target, 1,
count_others, other_blues, top_table, bot_table );
count_top = top_table->count;
count_bot = bot_table->count;
/* sanitize top table */
if ( count_top > 0 )
{
PSH_Blue_Zone zone = top_table->zones;
for ( count = count_top; count > 0; count--, zone++ )
{
FT_Int delta;
if ( count > 1 )
{
delta = zone[1].org_ref - zone[0].org_ref;
if ( zone->org_delta > delta )
zone->org_delta = delta;
}
zone->org_bottom = zone->org_ref;
zone->org_top = zone->org_delta + zone->org_ref;
}
}
/* sanitize bottom table */
if ( count_bot > 0 )
{
PSH_Blue_Zone zone = bot_table->zones;
for ( count = count_bot; count > 0; count--, zone++ )
{
FT_Int delta;
if ( count > 1 )
{
delta = zone[0].org_ref - zone[1].org_ref;
if ( zone->org_delta < delta )
zone->org_delta = delta;
}
zone->org_top = zone->org_ref;
zone->org_bottom = zone->org_delta + zone->org_ref;
}
}
/* expand top and bottom tables with blue fuzz */
{
FT_Int dim, top, bot, delta;
PSH_Blue_Zone zone;
zone = top_table->zones;
count = count_top;
for ( dim = 1; dim >= 0; dim-- )
{
if ( count > 0 )
{
/* expand the bottom of the lowest zone normally */
zone->org_bottom -= fuzz;
/* expand the top and bottom of intermediate zones; */
/* checking that the interval is smaller than the fuzz */
top = zone->org_top;
for ( count--; count > 0; count-- )
{
bot = zone[1].org_bottom;
delta = bot - top;
if ( delta < 2 * fuzz )
zone[0].org_top = zone[1].org_bottom = top + delta / 2;
else
{
zone[0].org_top = top + fuzz;
zone[1].org_bottom = bot - fuzz;
}
zone++;
top = zone->org_top;
}
/* expand the top of the highest zone normally */
zone->org_top = top + fuzz;
}
zone = bot_table->zones;
count = count_bot;
}
}
}
/* reset the blues table when the device transform changes */
static void
psh_blues_scale_zones( PSH_Blues blues,
FT_Fixed scale,
FT_Pos delta )
{
FT_UInt count;
FT_UInt num;
PSH_Blue_Table table = 0;
/* */
/* Determine whether we need to suppress overshoots or */
/* not. We simply need to compare the vertical scale */
/* parameter to the raw bluescale value. Here is why: */
/* */
/* We need to suppress overshoots for all pointsizes. */
/* At 300dpi that satisfies: */
/* */
/* pointsize < 240*bluescale + 0.49 */
/* */
/* This corresponds to: */
/* */
/* pixelsize < 1000*bluescale + 49/24 */
/* */
/* scale*EM_Size < 1000*bluescale + 49/24 */
/* */
/* However, for normal Type 1 fonts, EM_Size is 1000! */
/* We thus only check: */
/* */
/* scale < bluescale + 49/24000 */
/* */
/* which we shorten to */
/* */
/* "scale < bluescale" */
/* */
/* Note that `blue_scale' is stored 1000 times its real */
/* value, and that `scale' converts from font units to */
/* fractional pixels. */
/* */
/* 1000 / 64 = 125 / 8 */
if ( scale >= 0x20C49BAL )
blues->no_overshoots = FT_BOOL( scale < blues->blue_scale * 8 / 125 );
else
blues->no_overshoots = FT_BOOL( scale * 125 < blues->blue_scale * 8 );
/* */
/* The blue threshold is the font units distance under */
/* which overshoots are suppressed due to the BlueShift */
/* even if the scale is greater than BlueScale. */
/* */
/* It is the smallest distance such that */
/* */
/* dist <= BlueShift && dist*scale <= 0.5 pixels */
/* */
{
FT_Int threshold = blues->blue_shift;
while ( threshold > 0 && FT_MulFix( threshold, scale ) > 32 )
threshold--;
blues->blue_threshold = threshold;
}
for ( num = 0; num < 4; num++ )
{
PSH_Blue_Zone zone;
switch ( num )
{
case 0:
table = &blues->normal_top;
break;
case 1:
table = &blues->normal_bottom;
break;
case 2:
table = &blues->family_top;
break;
default:
table = &blues->family_bottom;
break;
}
zone = table->zones;
count = table->count;
for ( ; count > 0; count--, zone++ )
{
zone->cur_top = FT_MulFix( zone->org_top, scale ) + delta;
zone->cur_bottom = FT_MulFix( zone->org_bottom, scale ) + delta;
zone->cur_ref = FT_MulFix( zone->org_ref, scale ) + delta;
zone->cur_delta = FT_MulFix( zone->org_delta, scale );
/* round scaled reference position */
zone->cur_ref = FT_PIX_ROUND( zone->cur_ref );
#if 0
if ( zone->cur_ref > zone->cur_top )
zone->cur_ref -= 64;
else if ( zone->cur_ref < zone->cur_bottom )
zone->cur_ref += 64;
#endif
}
}
/* process the families now */
for ( num = 0; num < 2; num++ )
{
PSH_Blue_Zone zone1, zone2;
FT_UInt count1, count2;
PSH_Blue_Table normal, family;
switch ( num )
{
case 0:
normal = &blues->normal_top;
family = &blues->family_top;
break;
default:
normal = &blues->normal_bottom;
family = &blues->family_bottom;
}
zone1 = normal->zones;
count1 = normal->count;
for ( ; count1 > 0; count1--, zone1++ )
{
/* try to find a family zone whose reference position is less */
/* than 1 pixel far from the current zone */
zone2 = family->zones;
count2 = family->count;
for ( ; count2 > 0; count2--, zone2++ )
{
FT_Pos Delta;
Delta = zone1->org_ref - zone2->org_ref;
if ( Delta < 0 )
Delta = -Delta;
if ( FT_MulFix( Delta, scale ) < 64 )
{
zone1->cur_top = zone2->cur_top;
zone1->cur_bottom = zone2->cur_bottom;
zone1->cur_ref = zone2->cur_ref;
zone1->cur_delta = zone2->cur_delta;
break;
}
}
}
}
}
FT_LOCAL_DEF( void )
psh_blues_snap_stem( PSH_Blues blues,
FT_Int stem_top,
FT_Int stem_bot,
PSH_Alignment alignment )
{
PSH_Blue_Table table;
FT_UInt count;
FT_Pos delta;
PSH_Blue_Zone zone;
FT_Int no_shoots;
alignment->align = PSH_BLUE_ALIGN_NONE;
no_shoots = blues->no_overshoots;
/* look up stem top in top zones table */
table = &blues->normal_top;
count = table->count;
zone = table->zones;
for ( ; count > 0; count--, zone++ )
{
delta = stem_top - zone->org_bottom;
if ( delta < -blues->blue_fuzz )
break;
if ( stem_top <= zone->org_top + blues->blue_fuzz )
{
if ( no_shoots || delta <= blues->blue_threshold )
{
alignment->align |= PSH_BLUE_ALIGN_TOP;
alignment->align_top = zone->cur_ref;
}
break;
}
}
/* look up stem bottom in bottom zones table */
table = &blues->normal_bottom;
count = table->count;
zone = table->zones + count-1;
for ( ; count > 0; count--, zone-- )
{
delta = zone->org_top - stem_bot;
if ( delta < -blues->blue_fuzz )
break;
if ( stem_bot >= zone->org_bottom - blues->blue_fuzz )
{
if ( no_shoots || delta < blues->blue_threshold )
{
alignment->align |= PSH_BLUE_ALIGN_BOT;
alignment->align_bot = zone->cur_ref;
}
break;
}
}
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** GLOBAL HINTS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
static void
psh_globals_destroy( PSH_Globals globals )
{
if ( globals )
{
FT_Memory memory;
memory = globals->memory;
globals->dimension[0].stdw.count = 0;
globals->dimension[1].stdw.count = 0;
globals->blues.normal_top.count = 0;
globals->blues.normal_bottom.count = 0;
globals->blues.family_top.count = 0;
globals->blues.family_bottom.count = 0;
FT_FREE( globals );
#ifdef DEBUG_HINTER
ps_debug_globals = 0;
#endif
}
}
static FT_Error
psh_globals_new( FT_Memory memory,
T1_Private* priv,
PSH_Globals *aglobals )
{
PSH_Globals globals = NULL;
FT_Error error;
if ( !FT_NEW( globals ) )
{
FT_UInt count;
FT_Short* read;
globals->memory = memory;
/* copy standard widths */
{
PSH_Dimension dim = &globals->dimension[1];
PSH_Width write = dim->stdw.widths;
write->org = priv->standard_width[0];
write++;
read = priv->snap_widths;
for ( count = priv->num_snap_widths; count > 0; count-- )
{
write->org = *read;
write++;
read++;
}
dim->stdw.count = priv->num_snap_widths + 1;
}
/* copy standard heights */
{
PSH_Dimension dim = &globals->dimension[0];
PSH_Width write = dim->stdw.widths;
write->org = priv->standard_height[0];
write++;
read = priv->snap_heights;
for ( count = priv->num_snap_heights; count > 0; count-- )
{
write->org = *read;
write++;
read++;
}
dim->stdw.count = priv->num_snap_heights + 1;
}
/* copy blue zones */
psh_blues_set_zones( &globals->blues, priv->num_blue_values,
priv->blue_values, priv->num_other_blues,
priv->other_blues, priv->blue_fuzz, 0 );
psh_blues_set_zones( &globals->blues, priv->num_family_blues,
priv->family_blues, priv->num_family_other_blues,
priv->family_other_blues, priv->blue_fuzz, 1 );
globals->blues.blue_scale = priv->blue_scale;
globals->blues.blue_shift = priv->blue_shift;
globals->blues.blue_fuzz = priv->blue_fuzz;
globals->dimension[0].scale_mult = 0;
globals->dimension[0].scale_delta = 0;
globals->dimension[1].scale_mult = 0;
globals->dimension[1].scale_delta = 0;
#ifdef DEBUG_HINTER
ps_debug_globals = globals;
#endif
}
*aglobals = globals;
return error;
}
FT_LOCAL_DEF( FT_Error )
psh_globals_set_scale( PSH_Globals globals,
FT_Fixed x_scale,
FT_Fixed y_scale,
FT_Fixed x_delta,
FT_Fixed y_delta )
{
PSH_Dimension dim = &globals->dimension[0];
dim = &globals->dimension[0];
if ( x_scale != dim->scale_mult ||
x_delta != dim->scale_delta )
{
dim->scale_mult = x_scale;
dim->scale_delta = x_delta;
psh_globals_scale_widths( globals, 0 );
}
dim = &globals->dimension[1];
if ( y_scale != dim->scale_mult ||
y_delta != dim->scale_delta )
{
dim->scale_mult = y_scale;
dim->scale_delta = y_delta;
psh_globals_scale_widths( globals, 1 );
psh_blues_scale_zones( &globals->blues, y_scale, y_delta );
}
return 0;
}
FT_LOCAL_DEF( void )
psh_globals_funcs_init( PSH_Globals_FuncsRec* funcs )
{
funcs->create = psh_globals_new;
funcs->set_scale = psh_globals_set_scale;
funcs->destroy = psh_globals_destroy;
}
/* END */