forked from minhngoc25a/freetype2
[raster] Fix 5-levels grayscale output.
This was broken since version 2.3.0. * src/raster/ftraster.c (count_table): Use pre-2.3.0 values (which were then computed dynamically). (Vertical_Gray_Sweep_Step): Updated. (ft_black_render): Initialize `worker->gray_lines' (problem found by valgrind). (FT_RASTER_OPTION_ANTI_ALIASING, DEBUG_RASTER): Dont' #undef, just comment out.
This commit is contained in:
Werner Lemberg
parent
812d1bc90d
commit
766b822f4c
15
ChangeLog
15
ChangeLog
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@ -1,3 +1,18 @@
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2009-09-12 Werner Lemberg <wl@gnu.org>
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[raster] Fix 5-levels grayscale output.
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This was broken since version 2.3.0.
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* src/raster/ftraster.c (count_table): Use pre-2.3.0 values (which
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were then computed dynamically).
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(Vertical_Gray_Sweep_Step): Updated.
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(ft_black_render): Initialize `worker->gray_lines' (problem found by
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valgrind).
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(FT_RASTER_OPTION_ANTI_ALIASING, DEBUG_RASTER): Dont' #undef, just
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comment out.
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2009-09-12 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
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Improve configure.raw for cross build.
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@ -51,7 +51,7 @@
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#define FT_CONFIG_STANDARD_LIBRARY_H <stdlib.h>
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#include <string.h>
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#include <string.h> /* for memset */
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#include "ftmisc.h"
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#include "ftimage.h"
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@ -148,11 +148,11 @@
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/*************************************************************************/
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/* define DEBUG_RASTER if you want to compile a debugging version */
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#define xxxDEBUG_RASTER
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/* #define DEBUG_RASTER */
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/* undefine FT_RASTER_OPTION_ANTI_ALIASING if you do not want to support */
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/* 5-levels anti-aliasing */
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#undef FT_RASTER_OPTION_ANTI_ALIASING
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/* define FT_RASTER_OPTION_ANTI_ALIASING if you want to support */
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/* 5-levels anti-aliasing */
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/* #define FT_RASTER_OPTION_ANTI_ALIASING */
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/* The size of the two-lines intermediate bitmap used */
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/* for anti-aliasing, in bytes. */
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@ -567,24 +567,62 @@
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#ifdef FT_RASTER_OPTION_ANTI_ALIASING
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static const char count_table[256] =
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/* A lookup table used to quickly count set bits in four gray 2x2 */
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/* cells. The values of the table have been produced with the */
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/* following code: */
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/* */
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/* for ( i = 0; i < 256; i++ ) */
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/* { */
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/* l = 0; */
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/* j = i; */
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/* */
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/* for ( c = 0; c < 4; c++ ) */
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/* { */
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/* l <<= 4; */
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/* */
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/* if ( j & 0x80 ) l++; */
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/* if ( j & 0x40 ) l++; */
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/* */
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/* j = ( j << 2 ) & 0xFF; */
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/* } */
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/* printf( "0x%04X", l ); */
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/* } */
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/* */
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static const short count_table[256] =
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{
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0 , 1 , 1 , 2 , 1 , 2 , 2 , 3 , 1 , 2 , 2 , 3 , 2 , 3 , 3 , 4,
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1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
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1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
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2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
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1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
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2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
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2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
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3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
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1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5,
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2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
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2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
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3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
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2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6,
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3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
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3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7,
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4 , 5 , 5 , 6 , 5 , 6 , 6 , 7 , 5 , 6 , 6 , 7 , 6 , 7 , 7 , 8
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0x0000, 0x0001, 0x0001, 0x0002, 0x0010, 0x0011, 0x0011, 0x0012,
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0x0010, 0x0011, 0x0011, 0x0012, 0x0020, 0x0021, 0x0021, 0x0022,
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0x0100, 0x0101, 0x0101, 0x0102, 0x0110, 0x0111, 0x0111, 0x0112,
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0x0110, 0x0111, 0x0111, 0x0112, 0x0120, 0x0121, 0x0121, 0x0122,
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0x0100, 0x0101, 0x0101, 0x0102, 0x0110, 0x0111, 0x0111, 0x0112,
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0x0110, 0x0111, 0x0111, 0x0112, 0x0120, 0x0121, 0x0121, 0x0122,
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0x0200, 0x0201, 0x0201, 0x0202, 0x0210, 0x0211, 0x0211, 0x0212,
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0x0210, 0x0211, 0x0211, 0x0212, 0x0220, 0x0221, 0x0221, 0x0222,
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0x1000, 0x1001, 0x1001, 0x1002, 0x1010, 0x1011, 0x1011, 0x1012,
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0x1010, 0x1011, 0x1011, 0x1012, 0x1020, 0x1021, 0x1021, 0x1022,
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0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112,
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0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122,
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0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112,
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0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122,
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0x1200, 0x1201, 0x1201, 0x1202, 0x1210, 0x1211, 0x1211, 0x1212,
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0x1210, 0x1211, 0x1211, 0x1212, 0x1220, 0x1221, 0x1221, 0x1222,
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0x1000, 0x1001, 0x1001, 0x1002, 0x1010, 0x1011, 0x1011, 0x1012,
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0x1010, 0x1011, 0x1011, 0x1012, 0x1020, 0x1021, 0x1021, 0x1022,
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0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112,
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0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122,
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0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112,
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0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122,
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0x1200, 0x1201, 0x1201, 0x1202, 0x1210, 0x1211, 0x1211, 0x1212,
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0x1210, 0x1211, 0x1211, 0x1212, 0x1220, 0x1221, 0x1221, 0x1222,
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0x2000, 0x2001, 0x2001, 0x2002, 0x2010, 0x2011, 0x2011, 0x2012,
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0x2010, 0x2011, 0x2011, 0x2012, 0x2020, 0x2021, 0x2021, 0x2022,
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0x2100, 0x2101, 0x2101, 0x2102, 0x2110, 0x2111, 0x2111, 0x2112,
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0x2110, 0x2111, 0x2111, 0x2112, 0x2120, 0x2121, 0x2121, 0x2122,
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0x2100, 0x2101, 0x2101, 0x2102, 0x2110, 0x2111, 0x2111, 0x2112,
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0x2110, 0x2111, 0x2111, 0x2112, 0x2120, 0x2121, 0x2121, 0x2122,
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0x2200, 0x2201, 0x2201, 0x2202, 0x2210, 0x2211, 0x2211, 0x2212,
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0x2210, 0x2211, 0x2211, 0x2212, 0x2220, 0x2221, 0x2221, 0x2222
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};
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#endif /* FT_RASTER_OPTION_ANTI_ALIASING */
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@ -2635,10 +2673,10 @@
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static void
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Vertical_Gray_Sweep_Step( RAS_ARG )
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{
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Int c1, c2;
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PByte pix, bit, bit2;
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char* count = (char*)count_table;
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Byte* grays;
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Int c1, c2;
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PByte pix, bit, bit2;
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short* count = (short*)count_table;
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Byte* grays;
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ras.traceOfs += ras.gray_width;
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@ -3326,7 +3364,6 @@
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raster->grays[n] = n * 255 / 4;
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raster->gray_width = RASTER_GRAY_LINES / 2;
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#else
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FT_UNUSED( raster );
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#endif
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@ -3503,6 +3540,8 @@
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#ifdef FT_RASTER_OPTION_ANTI_ALIASING
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worker->grays = raster->grays;
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worker->gray_width = raster->gray_width;
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FT_MEM_ZERO( worker->gray_lines, worker->gray_width * 2 );
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#endif
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return ( params->flags & FT_RASTER_FLAG_AA )
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