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freetype2
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Code Issues 4 Releases Wiki Activity

* src/autofit/aflatin.c, src/autofit/aftypes.h, src/autofit/afwarp.h, 

src/autofit/afwarp.c: fix and enable the warper to improve "light"
        hinting mode. This is not necessarily a final version, but it seems
        to work well
This commit is contained in:
David Turner 2007-01-23 15:51:50 +00:00
parent 93a5c73cf8
commit b6de8d1d3f
5 changed files with 58 additions and 33 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
2007-01-23 David Turner <david@freetype.org>
* src/autofit/aflatin.c, src/autofit/aftypes.h, src/autofit/afwarp.h,
src/autofit/afwarp.c: fix and enable the warper to improve "light"
hinting mode. This is not necessarily a final version, but it seems
to work well
2007-01-21 Werner Lemberg <wl@gnu.org>
* ChangeLog: Split off older entries into...

36
src/autofit/aflatin.c
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@ -1396,7 +1396,7 @@
/* compute flags depending on render mode, etc. */
mode = metrics->root.scaler.render_mode;
#ifdef AF_USE_WARPER
#ifdef zzAF_USE_WARPER
if ( mode == FT_RENDER_MODE_LCD || mode == FT_RENDER_MODE_LCD_V )
{
metrics->root.scaler.render_mode = mode = FT_RENDER_MODE_NORMAL;
@ -2114,7 +2114,12 @@
goto Exit;
/* analyze glyph outline */
#ifdef AF_USE_WARPER
if ( metrics->root.scaler.render_mode == FT_RENDER_MODE_LIGHT ||
AF_HINTS_DO_HORIZONTAL( hints ) )
#else
if ( AF_HINTS_DO_HORIZONTAL( hints ) )
#endif
{
error = af_latin_hints_detect_features( hints, AF_DIMENSION_HORZ );
if ( error )
@ -2133,23 +2138,24 @@
/* grid-fit the outline */
for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
{
#ifdef AF_USE_WARPER
if ( ( dim == AF_DIMENSION_HORZ &&
metrics->root.scaler.render_mode == FT_RENDER_MODE_LIGHT ) )
{
AF_WarperRec warper;
FT_Fixed scale;
FT_Pos delta;
af_warper_compute( &warper, hints, dim, &scale, &delta );
af_glyph_hints_scale_dim( hints, dim, scale, delta );
continue;
}
#endif
if ( ( dim == AF_DIMENSION_HORZ && AF_HINTS_DO_HORIZONTAL( hints ) ) ||
( dim == AF_DIMENSION_VERT && AF_HINTS_DO_VERTICAL( hints ) ) )
{
#ifdef AF_USE_WARPER
if ( dim == AF_DIMENSION_HORZ &&
metrics->root.scaler.render_mode == FT_RENDER_MODE_NORMAL )
{
AF_WarperRec warper;
FT_Fixed scale;
FT_Pos delta;
af_warper_compute( &warper, hints, dim, &scale, &delta );
af_glyph_hints_scale_dim( hints, dim, scale, delta );
continue;
}
#endif
af_latin_hint_edges( hints, (AF_Dimension)dim );
af_glyph_hints_align_edge_points( hints, (AF_Dimension)dim );
af_glyph_hints_align_strong_points( hints, (AF_Dimension)dim );

2
src/autofit/aftypes.h
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@ -53,7 +53,7 @@ FT_BEGIN_HEADER
/*************************************************************************/
/*************************************************************************/
#define xxAF_USE_WARPER /* only define to use warp hinting */
#define AF_USE_WARPER /* only define to use warp hinting */
#define xxAF_DEBUG
#ifdef AF_DEBUG

45
src/autofit/afwarp.c
View File

@ -24,11 +24,11 @@
static const AF_WarpScore
af_warper_weights[64] =
{
35, 20, 20, 20, 15, 12, 10, 5, 2, 1, 0, 0, 0, 0, 0, 0,
35, 32, 30, 20, 15, 12, 10, 5, 2, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, -1, -2, -5, -8,-10,-10,-20,-20,-30,-30,
-30,-30,-20,-20,-10,-10, -8, -5, -2, -1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 2, 5, 10, 12, 15, 20, 20, 20,
0, 0, 0, 0, 0, 0, 0, 1, 2, 5, 10, 12, 15, 20, 30, 32,
};
#else
static const AF_WarpScore
@ -55,10 +55,10 @@
{
FT_Int idx_min, idx_max, idx0;
FT_UInt nn;
AF_WarpScore scores[64];
AF_WarpScore scores[65];
for ( nn = 0; nn < 64; nn++ )
for ( nn = 0; nn < 65; nn++ )
scores[nn] = 0;
idx0 = xx1 - warper->t1;
@ -71,16 +71,16 @@
if ( xx1min + w < warper->x2min )
xx1min = warper->x2min - ( xx2 - xx1 );
xx1min = warper->x2min - w;
xx1max = warper->x1max;
if ( xx1max + w > warper->x2max )
xx1max = warper->x2max - ( xx2 - xx1 );
xx1max = warper->x2max - w;
idx_min = xx1min - warper->t1;
idx_max = xx1max - warper->t1;
if ( idx_min > idx_max )
if ( idx_min < 0 || idx_min > idx_max || idx_max > 64 )
{
AF_LOG(( "invalid indices:\n"
" min=%d max=%d, xx1=%ld xx2=%ld,\n"
@ -97,7 +97,6 @@
FT_Pos len = segments[nn].max_coord - segments[nn].min_coord;
FT_Pos y0 = FT_MulFix( segments[nn].pos, scale ) + delta;
FT_Pos y = y0 + ( idx_min - idx0 );
FT_Int idx;
@ -165,7 +164,7 @@
warper->best_scale = org_scale;
warper->best_delta = org_delta;
warper->best_score = 0;
warper->best_score = INT_MIN;
warper->best_distort = 0;
axis = &hints->axis[dim];
@ -178,7 +177,7 @@
*a_delta = org_delta;
/* get X1 and X2, minimum and maximum in original coordinates */
if ( axis->num_segments < 1 )
if ( num_segments < 1 )
return;
#if 1
@ -238,19 +237,33 @@
warper->wmin = warper->x2min - warper->x1max;
warper->wmax = warper->x2max - warper->x1min;
if ( warper->wmin < warper->w0 - 32 )
warper->wmin = warper->w0 - 32;
#if 1
{
int margin = 16;
if ( warper->wmax > warper->w0 + 32 )
warper->wmax = warper->w0 + 32;
if ( warper->w0 <= 128 )
{
margin = 8;
if ( warper->w0 <= 96 )
margin = 4;
}
if ( warper->wmin < warper->w0 - margin )
warper->wmin = warper->w0 - margin;
if ( warper->wmax > warper->w0 + margin )
warper->wmax = warper->w0 + margin;
}
if ( warper->wmin < warper->w0 * 3 / 4 )
warper->wmin = warper->w0 * 3 / 4;
if ( warper->wmax > warper->w0 * 5 / 4 )
warper->wmax = warper->w0 * 5 / 4;
/* warper->wmin = warper->wmax = warper->w0; */
#else
/* no scaling, just translation */
warper->wmin = warper->wmax = warper->w0;
#endif
for ( w = warper->wmin; w <= warper->wmax; w++ )
{

1
src/autofit/afwarp.h
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@ -33,7 +33,6 @@ FT_BEGIN_HEADER
typedef struct AF_WarperRec_
{
FT_Int X1, X2;
FT_Pos x1, x2;
FT_Pos t1, t2;
FT_Pos x1min, x1max;