[truetype] Shortcut ppem calculations for square pixels.
* src/truetype/ttinterp.h (TT_ExecContextRec): New field `cur_ppem_func' with a function pointer. * src/truetype/ttinterp.c (TT_RunIns): Initialize `cur_ppem_func' depending on the pixel geometry to either... (Current_Ppem_Stretched): ... this for stretched pixels. (Current_Ppem): ... or this for square pixels. (DO_MPPEM, DO_MPS, Ins_DELTAP, Ins_DELTAC): Use `cur_ppem_func'.
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Alexei Podtelezhnikov
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1ec98b29ec
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14
ChangeLog
14
ChangeLog
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@ -1,3 +1,15 @@
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2014-09-02 Alexei Podtelezhnikov <apodtele@gmail.com>
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[truetype] Shortcut ppem calculations for square pixels.
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* src/truetype/ttinterp.h (TT_ExecContextRec): New field
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`cur_ppem_func' with a function pointer.
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* src/truetype/ttinterp.c (TT_RunIns): Initialize `cur_ppem_func'
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depending on the pixel geometry to either...
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(Current_Ppem_Stretched): ... this for stretched pixels.
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(Current_Ppem): ... or this for square pixels.
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(DO_MPPEM, DO_MPS, Ins_DELTAP, Ins_DELTAC): Use `cur_ppem_func'.
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2014-08-31 Behdad Esfahbod <behdad@behdad.org>
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Don't use `register' keyword. Fixes compiler warnings.
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@ -8,7 +20,7 @@
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2014-08-24 Alexei Podtelezhnikov <apodtele@gmail.com>
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[truetype] Optimize DELTAP and DELTAC.
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[truetype] Optimize DELTAP and DELTAC.
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* src/truetype/ttinterp.c (Ins_DELTAP, Ins_DELTAC): Move ppem
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calculations outside of the loop.
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@ -172,6 +172,9 @@
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#define CUR_Func_round( d, c ) \
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CUR.func_round( EXEC_ARG_ d, c )
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#define CUR_Func_cur_ppem() \
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CUR.func_cur_ppem( EXEC_ARG )
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#define CUR_Func_read_cvt( index ) \
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CUR.func_read_cvt( EXEC_ARG_ index )
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@ -184,12 +187,6 @@
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#define CURRENT_Ratio() \
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Current_Ratio( EXEC_ARG )
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#define CURRENT_Ppem() \
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Current_Ppem( EXEC_ARG )
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#define CUR_Ppem() \
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Cur_PPEM( EXEC_ARG )
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#define INS_SxVTL( a, b, c, d ) \
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Ins_SxVTL( EXEC_ARG_ a, b, c, d )
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@ -1706,8 +1703,15 @@
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}
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static FT_Long
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FT_CALLBACK_DEF( FT_Long )
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Current_Ppem( EXEC_OP )
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{
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return CUR.tt_metrics.ppem;
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}
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FT_CALLBACK_DEF( FT_Long )
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Current_Ppem_Stretched( EXEC_OP )
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{
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return FT_MulFix( CUR.tt_metrics.ppem, CURRENT_Ratio() );
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}
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@ -3089,7 +3093,7 @@
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#define DO_MPPEM \
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args[0] = CURRENT_Ppem();
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args[0] = CUR_Func_cur_ppem();
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/* Note: The pointSize should be irrelevant in a given font program; */
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@ -3102,7 +3106,7 @@
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#else
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#define DO_MPS \
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args[0] = CURRENT_Ppem();
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args[0] = CUR_Func_cur_ppem();
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#endif /* 0 */
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@ -7523,7 +7527,7 @@
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}
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#endif
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P = (FT_ULong)CURRENT_Ppem();
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P = (FT_ULong)CUR_Func_cur_ppem();
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nump = (FT_ULong)args[0]; /* some points theoretically may occur more
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than once, thus UShort isn't enough */
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@ -7692,7 +7696,7 @@
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}
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#endif
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P = (FT_ULong)CURRENT_Ppem();
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P = (FT_ULong)CUR_Func_cur_ppem();
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nump = (FT_ULong)args[0];
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for ( k = 1; k <= nump; k++ )
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@ -8271,11 +8275,12 @@
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CUR.iup_called = FALSE;
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#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
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/* set CVT functions */
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/* set PPEM and CVT functions */
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CUR.tt_metrics.ratio = 0;
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if ( CUR.metrics.x_ppem != CUR.metrics.y_ppem )
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{
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/* non-square pixels, use the stretched routines */
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CUR.func_cur_ppem = Current_Ppem_Stretched;
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CUR.func_read_cvt = Read_CVT_Stretched;
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CUR.func_write_cvt = Write_CVT_Stretched;
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CUR.func_move_cvt = Move_CVT_Stretched;
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@ -8283,6 +8288,7 @@
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else
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{
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/* square pixels, use normal routines */
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CUR.func_cur_ppem = Current_Ppem;
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CUR.func_read_cvt = Read_CVT;
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CUR.func_write_cvt = Write_CVT;
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CUR.func_move_cvt = Move_CVT;
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@ -4,7 +4,7 @@
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/* */
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/* TrueType bytecode interpreter (specification). */
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/* */
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/* Copyright 1996-2007, 2010, 2012-2013 by */
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/* Copyright 1996-2007, 2010, 2012-2014 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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@ -81,6 +81,10 @@ FT_BEGIN_HEADER
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(*TT_Project_Func)( EXEC_OP_ FT_Pos dx,
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FT_Pos dy );
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/* getting current ppem. Take care of non-square pixels if necessary */
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typedef FT_Long
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(*TT_Cur_Ppem_Func)( EXEC_OP );
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/* reading a cvt value. Take care of non-square pixels if necessary */
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typedef FT_F26Dot6
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(*TT_Get_CVT_Func)( EXEC_OP_ FT_ULong idx );
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@ -228,11 +232,6 @@ FT_BEGIN_HEADER
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FT_F26Dot6 phase; /* `SuperRounding' */
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FT_F26Dot6 threshold;
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#if 0
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/* this seems to be unused */
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FT_Int cur_ppem; /* ppem along the current proj vector */
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#endif
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FT_Bool instruction_trap; /* If `True', the interpreter will */
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/* exit after each instruction */
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@ -254,6 +253,8 @@ FT_BEGIN_HEADER
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TT_Move_Func func_move; /* current point move function */
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TT_Move_Func func_move_orig; /* move original position function */
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TT_Cur_Ppem_Func func_cur_ppem; /* get current proj. ppem value */
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TT_Get_CVT_Func func_read_cvt; /* read a cvt entry */
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TT_Set_CVT_Func func_write_cvt; /* write a cvt entry (in pixels) */
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TT_Set_CVT_Func func_move_cvt; /* incr a cvt entry (in pixels) */
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