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freetype2
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a small optimisation that should speed things a bit. 

I'm surprised I didn't do it before..
This commit is contained in:
David Turner 2000-08-29 16:03:28 +00:00
parent 5878a6d2ad
commit e12e313a04
1 changed files with 10 additions and 33 deletions
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43
src/base/ftstream.c
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@ -642,6 +642,7 @@
{
FT_Error error;
FT_Bool frame_accessed = 0;
FT_Byte* cursor = stream->cursor;
if ( !fields || !stream )
@ -663,6 +664,7 @@
goto Exit;
frame_accessed = 1;
cursor = stream->cursor;
fields++;
continue; /* loop! */
@ -690,74 +692,49 @@
case ft_frame_byte:
case ft_frame_schar: /* read a single byte */
value = GET_Byte();
value = NEXT_Byte(cursor);
sign_shift = 24;
break;
case ft_frame_short_be:
case ft_frame_ushort_be: /* read a 2-byte big-endian short */
value = GET_UShort();
value = NEXT_UShort(cursor);
sign_shift = 16;
break;
case ft_frame_short_le:
case ft_frame_ushort_le: /* read a 2-byte little-endian short */
value = 0;
p = stream->cursor;
if ( p + 1 < stream->limit )
{
value = ( FT_UShort)p[0] | ((FT_UShort)p[1] << 8 );
stream->cursor += 2;
}
value = NEXT_UShortLE(cursor);
sign_shift = 16;
break;
case ft_frame_long_be:
case ft_frame_ulong_be: /* read a 4-byte big-endian long */
value = GET_ULong();
value = NEXT_ULong(cursor);
sign_shift = 0;
break;
case ft_frame_long_le:
case ft_frame_ulong_le: /* read a 4-byte little-endian long */
value = 0;
p = stream->cursor;
if ( p + 3 < stream->limit )
{
value = (FT_ULong)p[0] |
( (FT_ULong)p[1] << 8 ) |
( (FT_ULong)p[2] << 16 ) |
( (FT_ULong)p[3] << 24 );
stream->cursor += 4;
}
value = NEXT_ULongLE(cursor);
sign_shift = 0;
break;
case ft_frame_off3_be:
case ft_frame_uoff3_be: /* read a 3-byte big-endian long */
value = GET_UOffset();
value = NEXT_UOffset(cursor);
sign_shift = 8;
break;
case ft_frame_off3_le:
case ft_frame_uoff3_le: /* read a 3-byte little-endian long */
value = 0;
p = stream->cursor;
if ( p + 2 < stream->limit )
{
value = (FT_ULong)p[0] |
( (FT_ULong)p[1] << 8 ) |
( (FT_ULong)p[2] << 16 );
stream->cursor += 3;
}
value = NEXT_UOffsetLE(cursor);
sign_shift = 8;
break;
default:
/* otherwise, exit the loop */
stream->cursor = cursor;
goto Exit;
}