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@@ -1920,6 +1920,44 @@ typedef ptrdiff_t FT_PtrDist; |
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1920
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1920
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)
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1921
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1921
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1922
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1922
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1923
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+ /*
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1924
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+ * The taxicab perimeter of the entire outline is used to estimate
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1925
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+ * the necessary memory pool or the job size in general. Clipping
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1926
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+ * is ignored because it might hurt the performance.
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1927
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+ */
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1928
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+ static long
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1929
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+ gray_taxi( RAS_ARG )
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1930
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+ {
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1931
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+ FT_Outline* outline = &ras.outline;
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1932
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+ short c, p, first, last;
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1933
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+ FT_Vector d, v;
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1934
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+ FT_Pos taxi;
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1935
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+
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1936
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+
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1937
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+ taxi = 0;
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1938
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+ last = -1;
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1939
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+ for ( c = 0; c < outline->n_contours; c++ )
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1940
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+ {
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1941
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+ first = last + 1;
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1942
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+ last = outline->contours[c];
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1943
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+
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1944
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+ d = outline->points[last];
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1945
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+ for ( p = first; p <= last; p++ )
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1946
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+ {
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1947
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+ v = outline->points[p];
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1948
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+ d.x -= v.x;
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1949
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+ d.y -= v.y;
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1950
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+
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1951
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+ taxi += FT_ABS( d.x ) + FT_ABS( d.y );
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1952
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+
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1953
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+ d = v;
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1954
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+ }
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1955
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+ }
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1956
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+
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1957
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+ return taxi >> 6;
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1958
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+ }
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1959
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+
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1960
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+
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1923
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1961
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static int
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1924
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1962
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gray_convert_glyph_inner( RAS_ARG_
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1925
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1963
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int continued )
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@@ -1935,7 +1973,7 @@ typedef ptrdiff_t FT_PtrDist; |
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1935
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1973
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if ( continued )
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1936
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1974
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FT_Trace_Enable();
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1937
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1975
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1938
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- FT_TRACE7(( "band [%d..%d]: %td cell%s remaining/\n",
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1976
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+ FT_TRACE7(( "band [%d..%d]: %td cell%s remaining\n",
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1939
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1977
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ras.min_ey,
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1940
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1978
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ras.max_ey,
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1941
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1979
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ras.cell_null - ras.cell_free,
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@@ -1964,7 +2002,8 @@ typedef ptrdiff_t FT_PtrDist; |
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1964
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2002
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1965
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2003
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TCell* buffer;
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1966
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2004
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size_t height = (size_t)( yMax - yMin );
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1967
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- size_t n = FT_MAX_GRAY_POOL / 8;
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2005
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+ size_t n;
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2006
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+ long size;
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1968
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2007
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TCoord y;
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1969
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2008
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TCoord bands[32]; /* enough to accommodate bisections */
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1970
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2009
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TCoord* band;
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@@ -1972,11 +2011,18 @@ typedef ptrdiff_t FT_PtrDist; |
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1972
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2011
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int continued = 0;
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1973
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2012
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1974
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2013
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1975
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- if ( FT_QNEW_ARRAY ( buffer, FT_MAX_GRAY_POOL ) )
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2014
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+ size = gray_taxi( RAS_VAR ) +
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2015
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+ height * sizeof ( PCell ) / sizeof ( TCell ) +
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2016
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+ 9; /* empirical extra for local extrema */
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2017
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+
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2018
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+ if ( FT_QNEW_ARRAY( buffer, size ) )
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1976
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2019
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return error;
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1977
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2020
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2021
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+ FT_TRACE7(( "Allocated %ld cells (%ld bytes)\n",
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2022
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+ size, size * sizeof ( TCell ) ));
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2023
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+
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1978
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2024
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/* Initialize the null cell at the end of the poll. */
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1979
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- ras.cell_null = buffer + FT_MAX_GRAY_POOL - 1;
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2025
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+ ras.cell_null = buffer + size - 1;
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1980
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2026
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ras.cell_null->x = CELL_MAX_X_VALUE;
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1981
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2027
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ras.cell_null->area = 0;
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1982
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2028
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ras.cell_null->cover = 0;
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@@ -1985,13 +2031,6 @@ typedef ptrdiff_t FT_PtrDist; |
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1985
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2031
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/* set up vertical bands */
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1986
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2032
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ras.ycells = (PCell*)buffer;
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1987
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2033
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1988
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- if ( height > n )
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1989
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- {
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1990
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- /* two divisions rounded up */
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1991
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- n = ( height + n - 1 ) / n;
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1992
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- height = ( height + n - 1 ) / n;
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1993
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- }
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1994
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-
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1995
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2034
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for ( y = yMin; y < yMax; )
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1996
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2035
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{
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1997
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2036
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ras.min_ey = y;
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