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[gxvar] Reduce number of mallocs.

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8% speed up in drawing GoogleSansFlex variable in HB benchmark-font.

* src/truetype/ttgxvar.c (TT_Vary_Apply_Glyph_Deltas): Use an allocation
  pool instead of individual allocations.
This commit is contained in:
Behdad Esfahbod (بهداد اسفهبد)
2025-05-20 23:09:16 -06:00
committed by Werner Lemberg
parent fd92af79d8
commit 582de1a4b6
1 changed files with 38 additions and 10 deletions
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48
src/truetype/ttgxvar.c
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@@ -4057,6 +4057,15 @@
FT_ULong here;
FT_UInt i, j;
FT_UInt peak_coords_size;
FT_UInt point_deltas_x_size;
FT_UInt points_org_size;
FT_UInt points_out_size;
FT_UInt has_delta_size;
FT_UInt pool_size;
FT_Byte* pool;
FT_Byte* p;
FT_Fixed* peak_coords = NULL;
FT_Fixed* tuple_coords;
FT_Fixed* im_start_coords;
@@ -4140,13 +4149,36 @@
tupleCount & GX_TC_TUPLE_COUNT_MASK,
( tupleCount & GX_TC_TUPLE_COUNT_MASK ) == 1 ? "" : "s" ));
if ( FT_QNEW_ARRAY( peak_coords, 3 * blend->num_axis ) ||
FT_NEW_ARRAY( point_deltas_x, 2 * n_points ) ||
FT_QNEW_ARRAY( points_org, n_points ) ||
FT_QNEW_ARRAY( points_out, n_points ) ||
FT_QNEW_ARRAY( has_delta, n_points ) )
peak_coords_size = ALIGN_SIZE( 3 * blend->num_axis );
point_deltas_x_size = ALIGN_SIZE( 2 * n_points * sizeof ( FT_Fixed ) );
points_org_size = ALIGN_SIZE( n_points * sizeof ( points_org[0] ) );
points_out_size = ALIGN_SIZE( n_points * sizeof ( points_out[0] ) );
has_delta_size = ALIGN_SIZE( n_points * sizeof ( has_delta[0] ) );
pool_size = peak_coords_size +
point_deltas_x_size +
points_org_size +
points_out_size +
has_delta_size;
if ( FT_ALLOC( pool, pool_size ) )
goto Exit;
p = pool;
peak_coords = (FT_Fixed*)p;
p += peak_coords_size;
point_deltas_x = (FT_Fixed*)p;
p += point_deltas_x_size;
points_org = (FT_Vector*)p;
p += points_org_size;
points_out = (FT_Vector*)p;
p += points_out_size;
has_delta = (FT_Bool*)p;
FT_MEM_SET( point_deltas_x,
0,
2 * n_points * sizeof ( point_deltas_x[0] ) );
im_start_coords = peak_coords + blend->num_axis;
im_end_coords = im_start_coords + blend->num_axis;
point_deltas_y = point_deltas_x + n_points;
@@ -4421,11 +4453,7 @@
Exit:
if ( sharedpoints != ALL_POINTS )
FT_FREE( sharedpoints );
FT_FREE( points_org );
FT_FREE( points_out );
FT_FREE( has_delta );
FT_FREE( peak_coords );
FT_FREE( point_deltas_x );
FT_FREE( pool );
FExit:
FT_FRAME_EXIT();