diff options
Diffstat (limited to 'src/freetype2/raster')
| -rw-r--r-- | src/freetype2/raster/ftmisc.h | 30 | ||||
| -rw-r--r-- | src/freetype2/raster/ftraster.c | 994 | ||||
| -rw-r--r-- | src/freetype2/raster/ftrend1.c | 46 | ||||
| -rw-r--r-- | src/freetype2/raster/ftrend1.h | 4 | ||||
| -rw-r--r-- | src/freetype2/raster/raster.c | 1 | ||||
| -rw-r--r-- | src/freetype2/raster/rastpic.c | 89 | ||||
| -rw-r--r-- | src/freetype2/raster/rastpic.h | 50 |
7 files changed, 796 insertions, 418 deletions
diff --git a/src/freetype2/raster/ftmisc.h b/src/freetype2/raster/ftmisc.h index c5dbd50..f04b540 100644 --- a/src/freetype2/raster/ftmisc.h +++ b/src/freetype2/raster/ftmisc.h @@ -5,7 +5,7 @@ /* Miscellaneous macros for stand-alone rasterizer (specification */ /* only). */ /* */ -/* Copyright 2005 by */ +/* Copyright 2005, 2009 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used */ @@ -27,7 +27,8 @@ #ifndef __FTMISC_H__ #define __FTMISC_H__ -#include <string.h> /* memset */ + /* memset */ +#include FT_CONFIG_STANDARD_LIBRARY_H #define FT_BEGIN_HEADER #define FT_END_HEADER @@ -51,6 +52,31 @@ (FT_ULong)_x4 ) + /* from include/freetype2/ftsystem.h */ + + typedef struct FT_MemoryRec_* FT_Memory; + + typedef void* (*FT_Alloc_Func)( FT_Memory memory, + long size ); + + typedef void (*FT_Free_Func)( FT_Memory memory, + void* block ); + + typedef void* (*FT_Realloc_Func)( FT_Memory memory, + long cur_size, + long new_size, + void* block ); + + typedef struct FT_MemoryRec_ + { + void* user; + + FT_Alloc_Func alloc; + FT_Free_Func free; + FT_Realloc_Func realloc; + + } FT_MemoryRec; + /* from src/ftcalc.c */ #include <inttypes.h> diff --git a/src/freetype2/raster/ftraster.c b/src/freetype2/raster/ftraster.c index 4cfca4e..23ad592 100644 --- a/src/freetype2/raster/ftraster.c +++ b/src/freetype2/raster/ftraster.c @@ -4,7 +4,7 @@ /* */ /* The FreeType glyph rasterizer (body). */ /* */ -/* Copyright 1996-2001, 2002, 2003, 2005, 2007 by */ +/* Copyright 1996-2001, 2002, 2003, 2005, 2007, 2008, 2009 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ @@ -49,6 +49,10 @@ #ifdef _STANDALONE_ +#define FT_CONFIG_STANDARD_LIBRARY_H <stdlib.h> + +#include <string.h> /* for memset */ + #include "ftmisc.h" #include "ftimage.h" @@ -58,6 +62,8 @@ #include "ftraster.h" #include FT_INTERNAL_CALC_H /* for FT_MulDiv only */ +#include "rastpic.h" + #endif /* !_STANDALONE_ */ @@ -72,13 +78,15 @@ /* profile is simply an array of scanline intersections on a given */ /* dimension. A profile's main attributes are */ /* */ - /* o its scanline position boundaries, i.e. `Ymin' and `Ymax'. */ + /* o its scanline position boundaries, i.e. `Ymin' and `Ymax' */ /* */ /* o an array of intersection coordinates for each scanline */ - /* between `Ymin' and `Ymax'. */ + /* between `Ymin' and `Ymax' */ /* */ /* o a direction, indicating whether it was built going `up' or */ - /* `down', as this is very important for filling rules. */ + /* `down', as this is very important for filling rules */ + /* */ + /* o its drop-out mode */ /* */ /* 2 - Sweeping the target map's scanlines in order to compute segment */ /* `spans' which are then filled. Additionally, this pass */ @@ -88,15 +96,15 @@ /* built from the bottom of the render pool, used as a stack. The */ /* following graphics shows the profile list under construction: */ /* */ - /* ____________________________________________________________ _ _ */ - /* | | | | | */ - /* | profile | coordinates for | profile | coordinates for |--> */ - /* | 1 | profile 1 | 2 | profile 2 |--> */ - /* |_________|___________________|_________|_________________|__ _ _ */ + /* __________________________________________________________ _ _ */ + /* | | | | | */ + /* | profile | coordinates for | profile | coordinates for |--> */ + /* | 1 | profile 1 | 2 | profile 2 |--> */ + /* |_________|_________________|_________|_________________|__ _ _ */ /* */ - /* ^ ^ */ - /* | | */ - /* start of render pool top */ + /* ^ ^ */ + /* | | */ + /* start of render pool top */ /* */ /* The top of the profile stack is kept in the `top' variable. */ /* */ @@ -140,13 +148,11 @@ /*************************************************************************/ /* define DEBUG_RASTER if you want to compile a debugging version */ -#define xxxDEBUG_RASTER +/* #define DEBUG_RASTER */ - /* undefine FT_RASTER_OPTION_ANTI_ALIASING if you do not want to support */ - /* 5-levels anti-aliasing */ -#ifdef FT_CONFIG_OPTION_5_GRAY_LEVELS -#define FT_RASTER_OPTION_ANTI_ALIASING -#endif + /* define FT_RASTER_OPTION_ANTI_ALIASING if you want to support */ + /* 5-levels anti-aliasing */ +/* #define FT_RASTER_OPTION_ANTI_ALIASING */ /* The size of the two-lines intermediate bitmap used */ /* for anti-aliasing, in bytes. */ @@ -183,13 +189,13 @@ /* Disable the tracing mechanism for simplicity -- developers can */ /* activate it easily by redefining these two macros. */ #ifndef FT_ERROR -#define FT_ERROR( x ) do ; while ( 0 ) /* nothing */ +#define FT_ERROR( x ) do { } while ( 0 ) /* nothing */ #endif #ifndef FT_TRACE -#define FT_TRACE( x ) do ; while ( 0 ) /* nothing */ -#define FT_TRACE1( x ) do ; while ( 0 ) /* nothing */ -#define FT_TRACE6( x ) do ; while ( 0 ) /* nothing */ +#define FT_TRACE( x ) do { } while ( 0 ) /* nothing */ +#define FT_TRACE1( x ) do { } while ( 0 ) /* nothing */ +#define FT_TRACE6( x ) do { } while ( 0 ) /* nothing */ #endif #define Raster_Err_None 0 @@ -199,9 +205,22 @@ #define Raster_Err_Invalid -4 #define Raster_Err_Unsupported -5 -#define ft_memset memset +#define ft_memset memset + +#define FT_DEFINE_RASTER_FUNCS( class_, glyph_format_, raster_new_, \ + raster_reset_, raster_set_mode_, \ + raster_render_, raster_done_ ) \ + const FT_Raster_Funcs class_ = \ + { \ + glyph_format_, \ + raster_new_, \ + raster_reset_, \ + raster_set_mode_, \ + raster_render_, \ + raster_done_ \ + }; -#else /* _STANDALONE_ */ +#else /* !_STANDALONE_ */ #include FT_INTERNAL_OBJECTS_H @@ -217,7 +236,7 @@ #define Raster_Err_Unsupported Raster_Err_Cannot_Render_Glyph -#endif /* _STANDALONE_ */ +#endif /* !_STANDALONE_ */ #ifndef FT_MEM_SET @@ -306,13 +325,10 @@ } TPoint; - typedef enum TFlow_ - { - Flow_None = 0, - Flow_Up = 1, - Flow_Down = -1 - - } TFlow; + /* values for the `flags' bit field */ +#define Flow_Up 0x8 +#define Overshoot_Top 0x10 +#define Overshoot_Bottom 0x20 /* States of each line, arc, and profile */ @@ -331,18 +347,21 @@ struct TProfile_ { - FT_F26Dot6 X; /* current coordinate during sweep */ - PProfile link; /* link to next profile - various purpose */ - PLong offset; /* start of profile's data in render pool */ - int flow; /* Profile orientation: Asc/Descending */ - long height; /* profile's height in scanlines */ - long start; /* profile's starting scanline */ - - unsigned countL; /* number of lines to step before this */ - /* profile becomes drawable */ - - PProfile next; /* next profile in same contour, used */ - /* during drop-out control */ + FT_F26Dot6 X; /* current coordinate during sweep */ + PProfile link; /* link to next profile (various purposes) */ + PLong offset; /* start of profile's data in render pool */ + unsigned flags; /* Bit 0-2: drop-out mode */ + /* Bit 3: profile orientation (up/down) */ + /* Bit 4: is top profile? */ + /* Bit 5: is bottom profile? */ + long height; /* profile's height in scanlines */ + long start; /* profile's starting scanline */ + + unsigned countL; /* number of lines to step before this */ + /* profile becomes drawable */ + + PProfile next; /* next profile in same contour, used */ + /* during drop-out control */ }; typedef PProfile TProfileList; @@ -372,10 +391,10 @@ #define RAS_VARS /* void */ #define RAS_VAR /* void */ -#define FT_UNUSED_RASTER do ; while ( 0 ) +#define FT_UNUSED_RASTER do { } while ( 0 ) -#else /* FT_STATIC_RASTER */ +#else /* !FT_STATIC_RASTER */ #define RAS_ARGS PWorker worker, @@ -387,10 +406,10 @@ #define FT_UNUSED_RASTER FT_UNUSED( worker ) -#endif /* FT_STATIC_RASTER */ +#endif /* !FT_STATIC_RASTER */ - typedef struct TWorker_ TWorker, *PWorker; + typedef struct TWorker_ TWorker, *PWorker; /* prototypes used for sweep function dispatch */ @@ -417,65 +436,68 @@ #define FRAC( x ) ( (x) & ( ras.precision - 1 ) ) #define SCALED( x ) ( ( (x) << ras.scale_shift ) - ras.precision_half ) - /* Note that I have moved the location of some fields in the */ - /* structure to ensure that the most used variables are used */ - /* at the top. Thus, their offset can be coded with less */ - /* opcodes, and it results in a smaller executable. */ +#define IS_BOTTOM_OVERSHOOT( x ) ( CEILING( x ) - x >= ras.precision_half ) +#define IS_TOP_OVERSHOOT( x ) ( x - FLOOR( x ) >= ras.precision_half ) + + /* The most used variables are positioned at the top of the structure. */ + /* Thus, their offset can be coded with less opcodes, resulting in a */ + /* smaller executable. */ struct TWorker_ { - Int precision_bits; /* precision related variables */ - Int precision; - Int precision_half; - Long precision_mask; - Int precision_shift; - Int precision_step; - Int precision_jitter; - - Int scale_shift; /* == precision_shift for bitmaps */ + Int precision_bits; /* precision related variables */ + Int precision; + Int precision_half; + Long precision_mask; + Int precision_shift; + Int precision_step; + Int precision_jitter; + + Int scale_shift; /* == precision_shift for bitmaps */ /* == precision_shift+1 for pixmaps */ - PLong buff; /* The profiles buffer */ - PLong sizeBuff; /* Render pool size */ - PLong maxBuff; /* Profiles buffer size */ - PLong top; /* Current cursor in buffer */ + PLong buff; /* The profiles buffer */ + PLong sizeBuff; /* Render pool size */ + PLong maxBuff; /* Profiles buffer size */ + PLong top; /* Current cursor in buffer */ - FT_Error error; + FT_Error error; - Int numTurns; /* number of Y-turns in outline */ + Int numTurns; /* number of Y-turns in outline */ - TPoint* arc; /* current Bezier arc pointer */ + TPoint* arc; /* current Bezier arc pointer */ - UShort bWidth; /* target bitmap width */ - PByte bTarget; /* target bitmap buffer */ - PByte gTarget; /* target pixmap buffer */ + UShort bWidth; /* target bitmap width */ + PByte bTarget; /* target bitmap buffer */ + PByte gTarget; /* target pixmap buffer */ - Long lastX, lastY, minY, maxY; + Long lastX, lastY; + Long minY, maxY; - UShort num_Profs; /* current number of profiles */ + UShort num_Profs; /* current number of profiles */ - Bool fresh; /* signals a fresh new profile which */ - /* 'start' field must be completed */ - Bool joint; /* signals that the last arc ended */ + Bool fresh; /* signals a fresh new profile which */ + /* `start' field must be completed */ + Bool joint; /* signals that the last arc ended */ /* exactly on a scanline. Allows */ /* removal of doublets */ - PProfile cProfile; /* current profile */ - PProfile fProfile; /* head of linked list of profiles */ - PProfile gProfile; /* contour's first profile in case */ + PProfile cProfile; /* current profile */ + PProfile fProfile; /* head of linked list of profiles */ + PProfile gProfile; /* contour's first profile in case */ /* of impact */ - TStates state; /* rendering state */ + TStates state; /* rendering state */ FT_Bitmap target; /* description of target bit/pixmap */ FT_Outline outline; - Long traceOfs; /* current offset in target bitmap */ - Long traceG; /* current offset in target pixmap */ + Long traceOfs; /* current offset in target bitmap */ + Long traceG; /* current offset in target pixmap */ - Short traceIncr; /* sweep's increment in target bitmap */ + Short traceIncr; /* sweep's increment in target bitmap */ - Short gray_min_x; /* current min x during gray rendering */ - Short gray_max_x; /* current max x during gray rendering */ + Short gray_min_x; /* current min x during gray rendering */ + Short gray_max_x; /* current max x during gray rendering */ /* dispatch variables */ @@ -484,31 +506,31 @@ Function_Sweep_Span* Proc_Sweep_Drop; Function_Sweep_Step* Proc_Sweep_Step; - Byte dropOutControl; /* current drop_out control method */ + Byte dropOutControl; /* current drop_out control method */ - Bool second_pass; /* indicates whether a horizontal pass */ + Bool second_pass; /* indicates whether a horizontal pass */ /* should be performed to control */ /* drop-out accurately when calling */ /* Render_Glyph. Note that there is */ /* no horizontal pass during gray */ /* rendering. */ - TPoint arcs[3 * MaxBezier + 1]; /* The Bezier stack */ + TPoint arcs[3 * MaxBezier + 1]; /* The Bezier stack */ - TBand band_stack[16]; /* band stack used for sub-banding */ - Int band_top; /* band stack top */ + TBand band_stack[16]; /* band stack used for sub-banding */ + Int band_top; /* band stack top */ #ifdef FT_RASTER_OPTION_ANTI_ALIASING - Byte* grays; + Byte* grays; - Byte gray_lines[RASTER_GRAY_LINES]; + Byte gray_lines[RASTER_GRAY_LINES]; /* Intermediate table used to render the */ /* graylevels pixmaps. */ /* gray_lines is a buffer holding two */ /* monochrome scanlines */ - Short gray_width; /* width in bytes of one monochrome */ + Short gray_width; /* width in bytes of one monochrome */ /* intermediate scanline of gray_lines. */ /* Each gray pixel takes 2 bits long there */ @@ -520,47 +542,90 @@ }; - typedef struct TRaster_ + typedef struct TRaster_ { - char* buffer; - long buffer_size; - void* memory; - PWorker worker; - Byte grays[5]; - Short gray_width; + char* buffer; + long buffer_size; + void* memory; + PWorker worker; + Byte grays[5]; + Short gray_width; } TRaster, *PRaster; #ifdef FT_STATIC_RASTER - static TWorker cur_ras; + static TWorker cur_ras; #define ras cur_ras -#else +#else /* !FT_STATIC_RASTER */ #define ras (*worker) -#endif /* FT_STATIC_RASTER */ +#endif /* !FT_STATIC_RASTER */ + +#ifdef FT_RASTER_OPTION_ANTI_ALIASING -static const char count_table[256] = -{ - 0 , 1 , 1 , 2 , 1 , 2 , 2 , 3 , 1 , 2 , 2 , 3 , 2 , 3 , 3 , 4, - 1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5, - 1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5, - 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6, - 1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5, - 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6, - 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6, - 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7, - 1 , 2 , 2 , 3 , 2 , 3 , 3 , 4 , 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5, - 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6, - 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6, - 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7, - 2 , 3 , 3 , 4 , 3 , 4 , 4 , 5 , 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6, - 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7, - 3 , 4 , 4 , 5 , 4 , 5 , 5 , 6 , 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7, - 4 , 5 , 5 , 6 , 5 , 6 , 6 , 7 , 5 , 6 , 6 , 7 , 6 , 7 , 7 , 8 }; + /* A lookup table used to quickly count set bits in four gray 2x2 */ + /* cells. The values of the table have been produced with the */ + /* following code: */ + /* */ + /* for ( i = 0; i < 256; i++ ) */ + /* { */ + /* l = 0; */ + /* j = i; */ + /* */ + /* for ( c = 0; c < 4; c++ ) */ + /* { */ + /* l <<= 4; */ + /* */ + /* if ( j & 0x80 ) l++; */ + /* if ( j & 0x40 ) l++; */ + /* */ + /* j = ( j << 2 ) & 0xFF; */ + /* } */ + /* printf( "0x%04X", l ); */ + /* } */ + /* */ + + static const short count_table[256] = + { + 0x0000, 0x0001, 0x0001, 0x0002, 0x0010, 0x0011, 0x0011, 0x0012, + 0x0010, 0x0011, 0x0011, 0x0012, 0x0020, 0x0021, 0x0021, 0x0022, + 0x0100, 0x0101, 0x0101, 0x0102, 0x0110, 0x0111, 0x0111, 0x0112, + 0x0110, 0x0111, 0x0111, 0x0112, 0x0120, 0x0121, 0x0121, 0x0122, + 0x0100, 0x0101, 0x0101, 0x0102, 0x0110, 0x0111, 0x0111, 0x0112, + 0x0110, 0x0111, 0x0111, 0x0112, 0x0120, 0x0121, 0x0121, 0x0122, + 0x0200, 0x0201, 0x0201, 0x0202, 0x0210, 0x0211, 0x0211, 0x0212, + 0x0210, 0x0211, 0x0211, 0x0212, 0x0220, 0x0221, 0x0221, 0x0222, + 0x1000, 0x1001, 0x1001, 0x1002, 0x1010, 0x1011, 0x1011, 0x1012, + 0x1010, 0x1011, 0x1011, 0x1012, 0x1020, 0x1021, 0x1021, 0x1022, + 0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112, + 0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122, + 0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112, + 0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122, + 0x1200, 0x1201, 0x1201, 0x1202, 0x1210, 0x1211, 0x1211, 0x1212, + 0x1210, 0x1211, 0x1211, 0x1212, 0x1220, 0x1221, 0x1221, 0x1222, + 0x1000, 0x1001, 0x1001, 0x1002, 0x1010, 0x1011, 0x1011, 0x1012, + 0x1010, 0x1011, 0x1011, 0x1012, 0x1020, 0x1021, 0x1021, 0x1022, + 0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112, + 0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122, + 0x1100, 0x1101, 0x1101, 0x1102, 0x1110, 0x1111, 0x1111, 0x1112, + 0x1110, 0x1111, 0x1111, 0x1112, 0x1120, 0x1121, 0x1121, 0x1122, + 0x1200, 0x1201, 0x1201, 0x1202, 0x1210, 0x1211, 0x1211, 0x1212, + 0x1210, 0x1211, 0x1211, 0x1212, 0x1220, 0x1221, 0x1221, 0x1222, + 0x2000, 0x2001, 0x2001, 0x2002, 0x2010, 0x2011, 0x2011, 0x2012, + 0x2010, 0x2011, 0x2011, 0x2012, 0x2020, 0x2021, 0x2021, 0x2022, + 0x2100, 0x2101, 0x2101, 0x2102, 0x2110, 0x2111, 0x2111, 0x2112, + 0x2110, 0x2111, 0x2111, 0x2112, 0x2120, 0x2121, 0x2121, 0x2122, + 0x2100, 0x2101, 0x2101, 0x2102, 0x2110, 0x2111, 0x2111, 0x2112, + 0x2110, 0x2111, 0x2111, 0x2112, 0x2120, 0x2121, 0x2121, 0x2122, + 0x2200, 0x2201, 0x2201, 0x2202, 0x2210, 0x2211, 0x2211, 0x2212, + 0x2210, 0x2211, 0x2211, 0x2212, 0x2220, 0x2221, 0x2221, 0x2222 + }; + +#endif /* FT_RASTER_OPTION_ANTI_ALIASING */ @@ -579,7 +644,7 @@ static const char count_table[256] = /* Set_High_Precision */ /* */ /* <Description> */ - /* Sets precision variables according to param flag. */ + /* Set precision variables according to param flag. */ /* */ /* <Input> */ /* High :: Set to True for high precision (typically for ppem < 18), */ @@ -590,9 +655,9 @@ static const char count_table[256] = { if ( High ) { - ras.precision_bits = 10; - ras.precision_step = 128; - ras.precision_jitter = 24; + ras.precision_bits = 12; + ras.precision_step = 256; + ras.precision_jitter = 50; } else { @@ -616,17 +681,21 @@ static const char count_table[256] = /* New_Profile */ /* */ /* <Description> */ - /* Creates a new profile in the render pool. */ + /* Create a new profile in the render pool. */ /* */ /* <Input> */ - /* aState :: The state/orientation of the new profile. */ + /* aState :: The state/orientation of the new profile. */ + /* */ + /* overshoot :: Whether the profile's unrounded start position */ + /* differs by at least a half pixel. */ /* */ /* <Return> */ /* SUCCESS on success. FAILURE in case of overflow or of incoherent */ /* profile. */ /* */ static Bool - New_Profile( RAS_ARGS TStates aState ) + New_Profile( RAS_ARGS TStates aState, + Bool overshoot ) { if ( !ras.fProfile ) { @@ -641,30 +710,36 @@ static const char count_table[256] = return FAILURE; } + ras.cProfile->flags = 0; + ras.cProfile->start = 0; + ras.cProfile->height = 0; + ras.cProfile->offset = ras.top; + ras.cProfile->link = (PProfile)0; + ras.cProfile->next = (PProfile)0; + ras.cProfile->flags = ras.dropOutControl; + switch ( aState ) { case Ascending_State: - ras.cProfile->flow = Flow_Up; + ras.cProfile->flags |= Flow_Up; + if ( overshoot ) + ras.cProfile->flags |= Overshoot_Bottom; + FT_TRACE6(( "New ascending profile = %lx\n", (long)ras.cProfile )); break; case Descending_State: - ras.cProfile->flow = Flow_Down; + if ( overshoot ) + ras.cProfile->flags |= Overshoot_Top; FT_TRACE6(( "New descending profile = %lx\n", (long)ras.cProfile )); break; default: - FT_ERROR(( "New_Profile: invalid profile direction!\n" )); + FT_ERROR(( "New_Profile: invalid profile direction\n" )); ras.error = Raster_Err_Invalid; return FAILURE; } - ras.cProfile->start = 0; - ras.cProfile->height = 0; - ras.cProfile->offset = ras.top; - ras.cProfile->link = (PProfile)0; - ras.cProfile->next = (PProfile)0; - if ( !ras.gProfile ) ras.gProfile = ras.cProfile; @@ -682,13 +757,17 @@ static const char count_table[256] = /* End_Profile */ /* */ /* <Description> */ - /* Finalizes the current profile. */ + /* Finalize the current profile. */ + /* */ + /* <Input> */ + /* overshoot :: Whether the profile's unrounded end position differs */ + /* by at least a half pixel. */ /* */ /* <Return> */ /* SUCCESS on success. FAILURE in case of overflow or incoherency. */ /* */ static Bool - End_Profile( RAS_ARG ) + End_Profile( RAS_ARGS Bool overshoot ) { Long h; PProfile oldProfile; @@ -698,7 +777,7 @@ static const char count_table[256] = if ( h < 0 ) { - FT_ERROR(( "End_Profile: negative height encountered!\n" )); + FT_ERROR(( "End_Profile: negative height encountered\n" )); ras.error = Raster_Err_Neg_Height; return FAILURE; } @@ -708,15 +787,24 @@ static const char count_table[256] = FT_TRACE6(( "Ending profile %lx, start = %ld, height = %ld\n", (long)ras.cProfile, ras.cProfile->start, h )); - oldProfile = ras.cProfile; ras.cProfile->height = h; - ras.cProfile = (PProfile)ras.top; + if ( overshoot ) + { + if ( ras.cProfile->flags & Flow_Up ) + ras.cProfile->flags |= Overshoot_Top; + else + ras.cProfile->flags |= Overshoot_Bottom; + } + + oldProfile = ras.cProfile; + ras.cProfile = (PProfile)ras.top; - ras.top += AlignProfileSize; + ras.top += AlignProfileSize; ras.cProfile->height = 0; ras.cProfile->offset = ras.top; - oldProfile->next = ras.cProfile; + + oldProfile->next = ras.cProfile; ras.num_Profs++; } @@ -739,7 +827,7 @@ static const char count_table[256] = /* Insert_Y_Turn */ /* */ /* <Description> */ - /* Inserts a salient into the sorted list placed on top of the render */ + /* Insert a salient into the sorted list placed on top of the render */ /* pool. */ /* */ /* <Input> */ @@ -794,7 +882,7 @@ static const char count_table[256] = /* Finalize_Profile_Table */ /* */ /* <Description> */ - /* Adjusts all links in the profiles list. */ + /* Adjust all links in the profiles list. */ /* */ /* <Return> */ /* SUCCESS on success. FAILURE in case of overflow. */ @@ -808,10 +896,10 @@ static const char count_table[256] = n = ras.num_Profs; + p = ras.fProfile; - if ( n > 1 ) + if ( n > 1 && p ) { - p = ras.fProfile; while ( n > 0 ) { if ( n > 1 ) @@ -819,23 +907,21 @@ static const char count_table[256] = else p->link = NULL; - switch ( p->flow ) + if ( p->flags & Flow_Up ) + { + bottom = (Int)p->start; + top = (Int)( p->start + p->height - 1 ); + } + else { - case Flow_Down: bottom = (Int)( p->start - p->height + 1 ); top = (Int)p->start; p->start = bottom; p->offset += p->height - 1; - break; - - case Flow_Up: - default: - bottom = (Int)p->start; - top = (Int)( p->start + p->height - 1 ); } - if ( Insert_Y_Turn( RAS_VARS bottom ) || - Insert_Y_Turn( RAS_VARS top + 1 ) ) + if ( Insert_Y_Turn( RAS_VARS bottom ) || + Insert_Y_Turn( RAS_VARS top + 1 ) ) return FAILURE; p = p->link; @@ -855,7 +941,7 @@ static const char count_table[256] = /* Split_Conic */ /* */ /* <Description> */ - /* Subdivides one conic Bezier into two joint sub-arcs in the Bezier */ + /* Subdivide one conic Bezier into two joint sub-arcs in the Bezier */ /* stack. */ /* */ /* <Input> */ @@ -894,7 +980,7 @@ static const char count_table[256] = /* Split_Cubic */ /* */ /* <Description> */ - /* Subdivides a third-order Bezier arc into two joint sub-arcs in the */ + /* Subdivide a third-order Bezier arc into two joint sub-arcs in the */ /* Bezier stack. */ /* */ /* <Note> */ @@ -936,7 +1022,7 @@ static const char count_table[256] = /* Line_Up */ /* */ /* <Description> */ - /* Computes the x-coordinates of an ascending line segment and stores */ + /* Compute the x-coordinates of an ascending line segment and store */ /* them in the render pool. */ /* */ /* <Input> */ @@ -1075,8 +1161,8 @@ static const char count_table[256] = /* Line_Down */ /* */ /* <Description> */ - /* Computes the x-coordinates of an descending line segment and */ - /* stores them in the render pool. */ + /* Compute the x-coordinates of an descending line segment and store */ + /* them in the render pool. */ /* */ /* <Input> */ /* x1 :: The x-coordinate of the segment's start point. */ @@ -1126,7 +1212,7 @@ static const char count_table[256] = /* Bezier_Up */ /* */ /* <Description> */ - /* Computes the x-coordinates of an ascending Bezier arc and stores */ + /* Compute the x-coordinates of an ascending Bezier arc and store */ /* them in the render pool. */ /* */ /* <Input> */ @@ -1227,7 +1313,7 @@ static const char count_table[256] = } else { - *top++ = arc[degree].x + FMulDiv( arc[0].x-arc[degree].x, + *top++ = arc[degree].x + FMulDiv( arc[0].x - arc[degree].x, e - y1, y2 - y1 ); arc -= degree; e += ras.precision; @@ -1259,7 +1345,7 @@ static const char count_table[256] = /* Bezier_Down */ /* */ /* <Description> */ - /* Computes the x-coordinates of an descending Bezier arc and stores */ + /* Compute the x-coordinates of an descending Bezier arc and store */ /* them in the render pool. */ /* */ /* <Input> */ @@ -1308,7 +1394,7 @@ static const char count_table[256] = /* Line_To */ /* */ /* <Description> */ - /* Injects a new line segment and adjusts Profiles list. */ + /* Inject a new line segment and adjust the Profiles list. */ /* */ /* <Input> */ /* x :: The x-coordinate of the segment's end point (its start point */ @@ -1332,13 +1418,15 @@ static const char count_table[256] = case Unknown_State: if ( y > ras.lastY ) { - if ( New_Profile( RAS_VARS Ascending_State ) ) + if ( New_Profile( RAS_VARS Ascending_State, + IS_BOTTOM_OVERSHOOT( ras.lastY ) ) ) return FAILURE; } else { if ( y < ras.lastY ) - if ( New_Profile( RAS_VARS Descending_State ) ) + if ( New_Profile( RAS_VARS Descending_State, + IS_TOP_OVERSHOOT( ras.lastY ) ) ) return FAILURE; } break; @@ -1346,8 +1434,9 @@ static const char count_table[256] = case Ascending_State: if ( y < ras.lastY ) { - if ( End_Profile( RAS_VAR ) || - New_Profile( RAS_VARS Descending_State ) ) + if ( End_Profile( RAS_VARS IS_TOP_OVERSHOOT( ras.lastY ) ) || + New_Profile( RAS_VARS Descending_State, + IS_TOP_OVERSHOOT( ras.lastY ) ) ) return FAILURE; } break; @@ -1355,8 +1444,9 @@ static const char count_table[256] = case Descending_State: if ( y > ras.lastY ) { - if ( End_Profile( RAS_VAR ) || - New_Profile( RAS_VARS Ascending_State ) ) + if ( End_Profile( RAS_VARS IS_BOTTOM_OVERSHOOT( ras.lastY ) ) || + New_Profile( RAS_VARS Ascending_State, + IS_BOTTOM_OVERSHOOT( ras.lastY ) ) ) return FAILURE; } break; @@ -1371,13 +1461,13 @@ static const char count_table[256] = { case Ascending_State: if ( Line_Up( RAS_VARS ras.lastX, ras.lastY, - x, y, ras.minY, ras.maxY ) ) + x, y, ras.minY, ras.maxY ) ) return FAILURE; break; case Descending_State: if ( Line_Down( RAS_VARS ras.lastX, ras.lastY, - x, y, ras.minY, ras.maxY ) ) + x, y, ras.minY, ras.maxY ) ) return FAILURE; break; @@ -1398,7 +1488,7 @@ static const char count_table[256] = /* Conic_To */ /* */ /* <Description> */ - /* Injects a new conic arc and adjusts the profile list. */ + /* Inject a new conic arc and adjust the profile list. */ /* */ /* <Input> */ /* cx :: The x-coordinate of the arc's new control point. */ @@ -1428,8 +1518,10 @@ static const char count_table[256] = ras.arc = ras.arcs; ras.arc[2].x = ras.lastX; ras.arc[2].y = ras.lastY; - ras.arc[1].x = cx; ras.arc[1].y = cy; - ras.arc[0].x = x; ras.arc[0].y = y; + ras.arc[1].x = cx; + ras.arc[1].y = cy; + ras.arc[0].x = x; + ras.arc[0].y = y; do { @@ -1469,13 +1561,17 @@ static const char count_table[256] = state_bez = y1 < y3 ? Ascending_State : Descending_State; if ( ras.state != state_bez ) { + Bool o = state_bez == Ascending_State ? IS_BOTTOM_OVERSHOOT( y1 ) + : IS_TOP_OVERSHOOT( y1 ); + + /* finalize current profile if any */ - if ( ras.state != Unknown_State && - End_Profile( RAS_VAR ) ) + if ( ras.state != Unknown_State && + End_Profile( RAS_VARS o ) ) goto Fail; /* create a new profile */ - if ( New_Profile( RAS_VARS state_bez ) ) + if ( New_Profile( RAS_VARS state_bez, o ) ) goto Fail; } @@ -1508,7 +1604,7 @@ static const char count_table[256] = /* Cubic_To */ /* */ /* <Description> */ - /* Injects a new cubic arc and adjusts the profile list. */ + /* Inject a new cubic arc and adjust the profile list. */ /* */ /* <Input> */ /* cx1 :: The x-coordinate of the arc's first new control point. */ @@ -1544,9 +1640,12 @@ static const char count_table[256] = ras.arc = ras.arcs; ras.arc[3].x = ras.lastX; ras.arc[3].y = ras.lastY; - ras.arc[2].x = cx1; ras.arc[2].y = cy1; - ras.arc[1].x = cx2; ras.arc[1].y = cy2; - ras.arc[0].x = x; ras.arc[0].y = y; + ras.arc[2].x = cx1; + ras.arc[2].y = cy1; + ras.arc[1].x = cx2; + ras.arc[1].y = cy2; + ras.arc[0].x = x; + ras.arc[0].y = y; do { @@ -1598,11 +1697,16 @@ static const char count_table[256] = /* detect a change of direction */ if ( ras.state != state_bez ) { - if ( ras.state != Unknown_State && - End_Profile( RAS_VAR ) ) + Bool o = state_bez == Ascending_State ? IS_BOTTOM_OVERSHOOT( y1 ) + : IS_TOP_OVERSHOOT( y1 ); + + + /* finalize current profile if any */ + if ( ras.state != Unknown_State && + End_Profile( RAS_VARS o ) ) goto Fail; - if ( New_Profile( RAS_VARS state_bez ) ) + if ( New_Profile( RAS_VARS state_bez, o ) ) goto Fail; } @@ -1646,7 +1750,7 @@ static const char count_table[256] = /* Decompose_Curve */ /* */ /* <Description> */ - /* Scans the outline arrays in order to emit individual segments and */ + /* Scan the outline arrays in order to emit individual segments and */ /* Beziers by calling Line_To() and Bezier_To(). It handles all */ /* weird cases, like when the first point is off the curve, or when */ /* there are simply no `on' points in the contour! */ @@ -1695,8 +1799,13 @@ static const char count_table[256] = v_control = v_start; point = points + first; - tags = ras.outline.tags + first; - tag = FT_CURVE_TAG( tags[0] ); + tags = ras.outline.tags + first; + + /* set scan mode if necessary */ + if ( tags[0] & FT_CURVE_TAG_HAS_SCANMODE ) + ras.dropOutControl = (Byte)tags[0] >> 5; + + tag = FT_CURVE_TAG( tags[0] ); /* A contour cannot start with a cubic control point! */ if ( tag == FT_CURVE_TAG_CUBIC ) @@ -1867,7 +1976,7 @@ static const char count_table[256] = /* Convert_Glyph */ /* */ /* <Description> */ - /* Converts a glyph into a series of segments and arcs and makes a */ + /* Convert a glyph into a series of segments and arcs and make a */ /* profiles list with them. */ /* */ /* <Input> */ @@ -1902,27 +2011,36 @@ static const char count_table[256] = for ( i = 0; i < ras.outline.n_contours; i++ ) { + Bool o; + + ras.state = Unknown_State; ras.gProfile = NULL; if ( Decompose_Curve( RAS_VARS (unsigned short)start, - ras.outline.contours[i], - flipped ) ) + ras.outline.contours[i], + flipped ) ) return FAILURE; start = ras.outline.contours[i] + 1; - /* We must now see whether the extreme arcs join or not */ + /* we must now check whether the extreme arcs join or not */ if ( FRAC( ras.lastY ) == 0 && ras.lastY >= ras.minY && ras.lastY <= ras.maxY ) - if ( ras.gProfile && ras.gProfile->flow == ras.cProfile->flow ) + if ( ras.gProfile && + ( ras.gProfile->flags & Flow_Up ) == + ( ras.cProfile->flags & Flow_Up ) ) ras.top--; /* Note that ras.gProfile can be nil if the contour was too small */ /* to be drawn. */ lastProfile = ras.cProfile; - if ( End_Profile( RAS_VAR ) ) + if ( ras.cProfile->flags & Flow_Up ) + o = IS_TOP_OVERSHOOT( ras.lastY ); + else + o = IS_BOTTOM_OVERSHOOT( ras.lastY ); + if ( End_Profile( RAS_VARS o ) ) return FAILURE; /* close the `next profile in contour' linked list */ @@ -2042,7 +2160,7 @@ static const char count_table[256] = while ( current ) { current->X = *current->offset; - current->offset += current->flow; + current->offset += current->flags & Flow_Up ? 1 : -1; current->height--; current = current->link; } @@ -2148,8 +2266,10 @@ static const char count_table[256] = f1 = (Byte) ( 0xFF >> ( e1 & 7 ) ); f2 = (Byte) ~( 0x7F >> ( e2 & 7 ) ); - if ( ras.gray_min_x > c1 ) ras.gray_min_x = (short)c1; - if ( ras.gray_max_x < c2 ) ras.gray_max_x = (short)c2; + if ( ras.gray_min_x > c1 ) + ras.gray_min_x = (short)c1; + if ( ras.gray_max_x < c2 ) + ras.gray_max_x = (short)c2; target = ras.bTarget + ras.traceOfs + c1; c2 -= c1; @@ -2182,38 +2302,63 @@ static const char count_table[256] = PProfile left, PProfile right ) { - Long e1, e2; + Long e1, e2, pxl; Short c1, f1; /* Drop-out control */ - e1 = CEILING( x1 ); - e2 = FLOOR ( x2 ); + /* e2 x2 x1 e1 */ + /* */ + /* ^ | */ + /* | | */ + /* +-------------+---------------------+------------+ */ + /* | | */ + /* | v */ + /* */ + /* pixel contour contour pixel */ + /* center center */ + + /* drop-out mode scan conversion rules (as defined in OpenType) */ + /* --------------------------------------------------------------- */ + /* 0 1, 2, 3 */ + /* 1 1, 2, 4 */ + /* 2 1, 2 */ + /* 3 same as mode 2 */ + /* 4 1, 2, 5 */ + /* 5 1, 2, 6 */ + /* 6, 7 same as mode 2 */ + + e1 = CEILING( x1 ); + e2 = FLOOR ( x2 ); + pxl = e1; if ( e1 > e2 ) { + Int dropOutControl = left->flags & 7; + + if ( e1 == e2 + ras.precision ) { - switch ( ras.dropOutControl ) + switch ( dropOutControl ) { - case 1: - e1 = e2; + case 0: /* simple drop-outs including stubs */ + pxl = e2; break; - case 4: - e1 = CEILING( (x1 + x2 + 1) / 2 ); + case 4: /* smart drop-outs including stubs */ + pxl = FLOOR( ( x1 + x2 - 1 ) / 2 + ras.precision_half ); break; - case 2: - case 5: - /* Drop-out Control Rule #4 */ + case 1: /* simple drop-outs excluding stubs */ + case 5: /* smart drop-outs excluding stubs */ + + /* Drop-out Control Rules #4 and #6 */ - /* The spec is not very clear regarding rule #4. It */ - /* presents a method that is way too costly to implement */ - /* while the general idea seems to get rid of `stubs'. */ + /* The specification neither provides an exact definition */ + /* of a `stub' nor gives exact rules to exclude them. */ /* */ - /* Here, we only get rid of stubs recognized if: */ + /* Here the constraints we use to recognize a stub. */ /* */ /* upper stub: */ /* */ @@ -2227,59 +2372,64 @@ static const char count_table[256] = /* - P_Left is the successor of P_Right in that contour */ /* - y is the bottom of P_Left */ /* */ + /* We draw a stub if the following constraints are met. */ + /* */ + /* - for an upper or lower stub, there is top or bottom */ + /* overshoot, respectively */ + /* - the covered interval is greater or equal to a half */ + /* pixel */ + + /* upper stub test */ + if ( left->next == right && + left->height <= 0 && + !( left->flags & Overshoot_Top && + x2 - x1 >= ras.precision_half ) ) + return; - /* FIXXXME: uncommenting this line solves the disappearing */ - /* bit problem in the `7' of verdana 10pts, but */ - /* makes a new one in the `C' of arial 14pts */ - -#if 0 - if ( x2 - x1 < ras.precision_half ) -#endif - { - /* upper stub test */ - if ( left->next == right && left->height <= 0 ) - return; - - /* lower stub test */ - if ( right->next == left && left->start == y ) - return; - } - - /* check that the rightmost pixel isn't set */ - - e1 = TRUNC( e1 ); - - c1 = (Short)( e1 >> 3 ); - f1 = (Short)( e1 & 7 ); - - if ( e1 >= 0 && e1 < ras.bWidth && - ras.bTarget[ras.traceOfs + c1] & ( 0x80 >> f1 ) ) + /* lower stub test */ + if ( right->next == left && + left->start == y && + !( left->flags & Overshoot_Bottom && + x2 - x1 >= ras.precision_half ) ) return; - if ( ras.dropOutControl == 2 ) - e1 = e2; + if ( dropOutControl == 1 ) + pxl = e2; else - e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); - + pxl = FLOOR( ( x1 + x2 - 1 ) / 2 + ras.precision_half ); break; - default: - return; /* unsupported mode */ + default: /* modes 2, 3, 6, 7 */ + return; /* no drop-out control */ } + + /* check that the other pixel isn't set */ + e1 = pxl == e1 ? e2 : e1; + + e1 = TRUNC( e1 ); + + c1 = (Short)( e1 >> 3 ); + f1 = (Short)( e1 & 7 ); + + if ( e1 >= 0 && e1 < ras.bWidth && + ras.bTarget[ras.traceOfs + c1] & ( 0x80 >> f1 ) ) + return; } else return; } - e1 = TRUNC( e1 ); + e1 = TRUNC( pxl ); if ( e1 >= 0 && e1 < ras.bWidth ) { c1 = (Short)( e1 >> 3 ); f1 = (Short)( e1 & 7 ); - if ( ras.gray_min_x > c1 ) ras.gray_min_x = c1; - if ( ras.gray_max_x < c1 ) ras.gray_max_x = c1; + if ( ras.gray_min_x > c1 ) + ras.gray_min_x = c1; + if ( ras.gray_max_x < c1 ) + ras.gray_max_x = c1; ras.bTarget[ras.traceOfs + c1] |= (char)( 0x80 >> f1 ); } @@ -2363,74 +2513,88 @@ static const char count_table[256] = PProfile left, PProfile right ) { - Long e1, e2; + Long e1, e2, pxl; PByte bits; Byte f1; /* During the horizontal sweep, we only take care of drop-outs */ - e1 = CEILING( x1 ); - e2 = FLOOR ( x2 ); + /* e1 + <-- pixel center */ + /* | */ + /* x1 ---+--> <-- contour */ + /* | */ + /* | */ + /* x2 <--+--- <-- contour */ + /* | */ + /* | */ + /* e2 + <-- pixel center */ + + e1 = CEILING( x1 ); + e2 = FLOOR ( x2 ); + pxl = e1; if ( e1 > e2 ) { + Int dropOutControl = left->flags & 7; + + if ( e1 == e2 + ras.precision ) { - switch ( ras.dropOutControl ) + switch ( dropOutControl ) { - case 1: - e1 = e2; + case 0: /* simple drop-outs including stubs */ + pxl = e2; break; - case 4: - e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); + case 4: /* smart drop-outs including stubs */ + pxl = FLOOR( ( x1 + x2 - 1 ) / 2 + ras.precision_half ); break; - case 2: - case 5: - - /* Drop-out Control Rule #4 */ - - /* The spec is not very clear regarding rule #4. It */ - /* presents a method that is way too costly to implement */ - /* while the general idea seems to get rid of `stubs'. */ - /* */ + case 1: /* simple drop-outs excluding stubs */ + case 5: /* smart drop-outs excluding stubs */ + /* see Vertical_Sweep_Drop for details */ /* rightmost stub test */ - if ( left->next == right && left->height <= 0 ) + if ( left->next == right && + left->height <= 0 && + !( left->flags & Overshoot_Top && + x2 - x1 >= ras.precision_half ) ) return; /* leftmost stub test */ - if ( right->next == left && left->start == y ) + if ( right->next == left && + left->start == y && + !( left->flags & Overshoot_Bottom && + x2 - x1 >= ras.precision_half ) ) return; - /* check that the rightmost pixel isn't set */ - - e1 = TRUNC( e1 ); + if ( dropOutControl == 1 ) + pxl = e2; + else + pxl = FLOOR( ( x1 + x2 - 1 ) / 2 + ras.precision_half ); + break; - bits = ras.bTarget + ( y >> 3 ); - f1 = (Byte)( 0x80 >> ( y & 7 ) ); + default: /* modes 2, 3, 6, 7 */ + return; /* no drop-out control */ + } - bits -= e1 * ras.target.pitch; - if ( ras.target.pitch > 0 ) - bits += ( ras.target.rows - 1 ) * ras.target.pitch; + /* check that the other pixel isn't set */ + e1 = pxl == e1 ? e2 : e1; - if ( e1 >= 0 && - e1 < ras.target.rows && - *bits & f1 ) - return; + e1 = TRUNC( e1 ); - if ( ras.dropOutControl == 2 ) - e1 = e2; - else - e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); + bits = ras.bTarget + ( y >> 3 ); + f1 = (Byte)( 0x80 >> ( y & 7 ) ); - break; + bits -= e1 * ras.target.pitch; + if ( ras.target.pitch > 0 ) + bits += ( ras.target.rows - 1 ) * ras.target.pitch; - default: - return; /* unsupported mode */ - } + if ( e1 >= 0 && + e1 < ras.target.rows && + *bits & f1 ) + return; } else return; @@ -2439,7 +2603,7 @@ static const char count_table[256] = bits = ras.bTarget + ( y >> 3 ); f1 = (Byte)( 0x80 >> ( y & 7 ) ); - e1 = TRUNC( e1 ); + e1 = TRUNC( pxl ); if ( e1 >= 0 && e1 < ras.target.rows ) { @@ -2509,10 +2673,10 @@ static const char count_table[256] = static void Vertical_Gray_Sweep_Step( RAS_ARG ) { - Int c1, c2; - PByte pix, bit, bit2; - char* count = (char*)count_table; - Byte* grays; + Int c1, c2; + PByte pix, bit, bit2; + short* count = (short*)count_table; + Byte* grays; ras.traceOfs += ras.gray_width; @@ -2524,10 +2688,10 @@ static const char count_table[256] = if ( ras.gray_max_x >= 0 ) { - Long last_pixel = ras.target.width - 1; - Int last_cell = last_pixel >> 2; - Int last_bit = last_pixel & 3; - Bool over = 0; + Long last_pixel = ras.target.width - 1; + Int last_cell = last_pixel >> 2; + Int last_bit = last_pixel & 3; + Bool over = 0; if ( ras.gray_max_x >= last_cell && last_bit != 3 ) @@ -2539,8 +2703,8 @@ static const char count_table[256] = if ( ras.gray_min_x < 0 ) ras.gray_min_x = 0; - bit = ras.bTarget + ras.gray_min_x; - bit2 = bit + ras.gray_width; + bit = ras.bTarget + ras.gray_min_x; + bit2 = bit + ras.gray_width; c1 = ras.gray_max_x - ras.gray_min_x; @@ -2625,32 +2789,30 @@ static const char count_table[256] = /* During the horizontal sweep, we only take care of drop-outs */ + e1 = CEILING( x1 ); e2 = FLOOR ( x2 ); if ( e1 > e2 ) { + Int dropOutControl = left->flags & 7; + + if ( e1 == e2 + ras.precision ) { - switch ( ras.dropOutControl ) + switch ( dropOutControl ) { - case 1: + case 0: /* simple drop-outs including stubs */ e1 = e2; break; - case 4: - e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); + case 4: /* smart drop-outs including stubs */ + e1 = FLOOR( ( x1 + x2 - 1 ) / 2 + ras.precision_half ); break; - case 2: - case 5: - - /* Drop-out Control Rule #4 */ - - /* The spec is not very clear regarding rule #4. It */ - /* presents a method that is way too costly to implement */ - /* while the general idea seems to get rid of `stubs'. */ - /* */ + case 1: /* simple drop-outs excluding stubs */ + case 5: /* smart drop-outs excluding stubs */ + /* see Vertical_Sweep_Drop for details */ /* rightmost stub test */ if ( left->next == right && left->height <= 0 ) @@ -2660,15 +2822,15 @@ static const char count_table[256] = if ( right->next == left && left->start == y ) return; - if ( ras.dropOutControl == 2 ) + if ( dropOutControl == 1 ) e1 = e2; else - e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); + e1 = FLOOR( ( x1 + x2 - 1 ) / 2 + ras.precision_half ); break; - default: - return; /* unsupported mode */ + default: /* modes 2, 3, 6, 7 */ + return; /* no drop-out control */ } } else @@ -2720,7 +2882,7 @@ static const char count_table[256] = TProfileList draw_left, draw_right; - /* Init empty linked lists */ + /* initialize empty linked lists */ Init_Linked( &waiting ); @@ -2740,8 +2902,10 @@ static const char count_table[256] = bottom = (Short)P->start; top = (Short)( P->start + P->height - 1 ); - if ( min_Y > bottom ) min_Y = bottom; - if ( max_Y < top ) max_Y = top; + if ( min_Y > bottom ) + min_Y = bottom; + if ( max_Y < top ) + max_Y = top; P->X = 0; InsNew( &waiting, P ); @@ -2749,18 +2913,18 @@ static const char count_table[256] = P = Q; } - /* Check the Y-turns */ + /* check the Y-turns */ if ( ras.numTurns == 0 ) { ras.error = Raster_Err_Invalid; return FAILURE; } - /* Now inits the sweep */ + /* now initialize the sweep */ ras.Proc_Sweep_Init( RAS_VARS &min_Y, &max_Y ); - /* Then compute the distance of each profile from min_Y */ + /* then compute the distance of each profile from min_Y */ P = waiting; @@ -2770,18 +2934,18 @@ static const char count_table[256] = P = P->link; } - /* Let's go */ + /* let's go */ y = min_Y; y_height = 0; - if ( ras.numTurns > 0 && + if ( ras.numTurns > 0 && ras.sizeBuff[-ras.numTurns] == min_Y ) ras.numTurns--; while ( ras.numTurns > 0 ) { - /* look in the waiting list for new activations */ + /* check waiting list for new activations */ P = waiting; @@ -2793,22 +2957,16 @@ static const char count_table[256] = { DelOld( &waiting, P ); - switch ( P->flow ) - { - case Flow_Up: + if ( P->flags & Flow_Up ) InsNew( &draw_left, P ); - break; - - case Flow_Down: + else InsNew( &draw_right, P ); - break; - } } P = Q; } - /* Sort the drawing lists */ + /* sort the drawing lists */ Sort( &draw_left ); Sort( &draw_right ); @@ -2818,7 +2976,7 @@ static const char count_table[256] = while ( y < y_change ) { - /* Let's trace */ + /* let's trace */ dropouts = 0; @@ -2837,22 +2995,28 @@ static const char count_table[256] = x2 = xs; } - if ( x2 - x1 <= ras.precision ) - { - e1 = FLOOR( x1 ); - e2 = CEILING( x2 ); + e1 = FLOOR( x1 ); + e2 = CEILING( x2 ); - if ( ras.dropOutControl != 0 && - ( e1 > e2 || e2 == e1 + ras.precision ) ) + if ( x2 - x1 <= ras.precision && + e1 != x1 && e2 != x2 ) + { + if ( e1 > e2 || e2 == e1 + ras.precision ) { - /* a drop out was detected */ + Int dropOutControl = P_Left->flags & 7; + + + if ( dropOutControl != 2 ) + { + /* a drop-out was detected */ - P_Left ->X = x1; - P_Right->X = x2; + P_Left ->X = x1; + P_Right->X = x2; - /* mark profile for drop-out processing */ - P_Left->countL = 1; - dropouts++; + /* mark profile for drop-out processing */ + P_Left->countL = 1; + dropouts++; + } goto Skip_To_Next; } @@ -2866,9 +3030,9 @@ static const char count_table[256] = P_Right = P_Right->link; } - /* now perform the dropouts _after_ the span drawing -- */ - /* drop-outs processing has been moved out of the loop */ - /* for performance tuning */ + /* handle drop-outs _after_ the span drawing -- */ + /* drop-out processing has been moved out of the loop */ + /* for performance tuning */ if ( dropouts > 0 ) goto Scan_DropOuts; @@ -2885,7 +3049,7 @@ static const char count_table[256] = } } - /* Now finalize the profiles that needs it */ + /* now finalize the profiles that need it */ P = draw_left; while ( P ) @@ -2906,7 +3070,7 @@ static const char count_table[256] = } } - /* for gray-scaling, flushes the bitmap scanline cache */ + /* for gray-scaling, flush the bitmap scanline cache */ while ( y <= max_Y ) { ras.Proc_Sweep_Step( RAS_VAR ); @@ -2949,7 +3113,7 @@ static const char count_table[256] = /* Render_Single_Pass */ /* */ /* <Description> */ - /* Performs one sweep with sub-banding. */ + /* Perform one sweep with sub-banding. */ /* */ /* <Input> */ /* flipped :: If set, flip the direction of the outline. */ @@ -3024,7 +3188,7 @@ static const char count_table[256] = /* Render_Glyph */ /* */ /* <Description> */ - /* Renders a glyph in a bitmap. Sub-banding if needed. */ + /* Render a glyph in a bitmap. Sub-banding if needed. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ @@ -3036,14 +3200,24 @@ static const char count_table[256] = Set_High_Precision( RAS_VARS ras.outline.flags & - FT_OUTLINE_HIGH_PRECISION ); - ras.scale_shift = ras.precision_shift; - /* Drop-out mode 2 is hard-coded since this is the only mode used */ - /* on Windows platforms. Using other modes, as specified by the */ - /* font, results in misplaced pixels. */ - ras.dropOutControl = 2; - ras.second_pass = (FT_Byte)( !( ras.outline.flags & - FT_OUTLINE_SINGLE_PASS ) ); + FT_OUTLINE_HIGH_PRECISION ); + ras.scale_shift = ras.precision_shift; + + if ( ras.outline.flags & FT_OUTLINE_IGNORE_DROPOUTS ) + ras.dropOutControl = 2; + else + { + if ( ras.outline.flags & FT_OUTLINE_SMART_DROPOUTS ) + ras.dropOutControl = 4; + else + ras.dropOutControl = 0; + + if ( !( ras.outline.flags & FT_OUTLINE_INCLUDE_STUBS ) ) + ras.dropOutControl += 1; + } + + ras.second_pass = (FT_Byte)( !( ras.outline.flags & + FT_OUTLINE_SINGLE_PASS ) ); /* Vertical Sweep */ ras.Proc_Sweep_Init = Vertical_Sweep_Init; @@ -3062,7 +3236,7 @@ static const char count_table[256] = return error; /* Horizontal Sweep */ - if ( ras.second_pass && ras.dropOutControl != 0 ) + if ( ras.second_pass && ras.dropOutControl != 2 ) { ras.Proc_Sweep_Init = Horizontal_Sweep_Init; ras.Proc_Sweep_Span = Horizontal_Sweep_Span; @@ -3083,14 +3257,13 @@ static const char count_table[256] = #ifdef FT_RASTER_OPTION_ANTI_ALIASING - /*************************************************************************/ /* */ /* <Function> */ /* Render_Gray_Glyph */ /* */ /* <Description> */ - /* Renders a glyph with grayscaling. Sub-banding if needed. */ + /* Render a glyph with grayscaling. Sub-banding if needed. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ @@ -3103,13 +3276,23 @@ static const char count_table[256] = Set_High_Precision( RAS_VARS ras.outline.flags & - FT_OUTLINE_HIGH_PRECISION ); - ras.scale_shift = ras.precision_shift + 1; - /* Drop-out mode 2 is hard-coded since this is the only mode used */ - /* on Windows platforms. Using other modes, as specified by the */ - /* font, results in misplaced pixels. */ - ras.dropOutControl = 2; - ras.second_pass = !( ras.outline.flags & FT_OUTLINE_SINGLE_PASS ); + FT_OUTLINE_HIGH_PRECISION ); + ras.scale_shift = ras.precision_shift + 1; + + if ( ras.outline.flags & FT_OUTLINE_IGNORE_DROPOUTS ) + ras.dropOutControl = 2; + else + { + if ( ras.outline.flags & FT_OUTLINE_SMART_DROPOUTS ) + ras.dropOutControl = 4; + else + ras.dropOutControl = 0; + + if ( !( ras.outline.flags & FT_OUTLINE_INCLUDE_STUBS ) ) + ras.dropOutControl += 1; + } + + ras.second_pass = !( ras.outline.flags & FT_OUTLINE_SINGLE_PASS ); /* Vertical Sweep */ @@ -3137,7 +3320,7 @@ static const char count_table[256] = return error; /* Horizontal Sweep */ - if ( ras.second_pass && ras.dropOutControl != 0 ) + if ( ras.second_pass && ras.dropOutControl != 2 ) { ras.Proc_Sweep_Init = Horizontal_Sweep_Init; ras.Proc_Sweep_Span = Horizontal_Gray_Sweep_Span; @@ -3172,8 +3355,6 @@ static const char count_table[256] = static void ft_black_init( PRaster raster ) { - FT_UNUSED( raster ); - #ifdef FT_RASTER_OPTION_ANTI_ALIASING FT_UInt n; @@ -3183,7 +3364,8 @@ static const char count_table[256] = raster->grays[n] = n * 255 / 4; raster->gray_width = RASTER_GRAY_LINES / 2; - +#else + FT_UNUSED( raster ); #endif } @@ -3196,7 +3378,7 @@ static const char count_table[256] = static int - ft_black_new( void* memory, + ft_black_new( void* memory, FT_Raster *araster ) { static TRaster the_raster; @@ -3254,9 +3436,9 @@ static const char count_table[256] = static void - ft_black_reset( PRaster raster, - char* pool_base, - long pool_size ) + ft_black_reset( PRaster raster, + char* pool_base, + long pool_size ) { if ( raster ) { @@ -3281,9 +3463,9 @@ static const char count_table[256] = static void - ft_black_set_mode( PRaster raster, - unsigned long mode, - const char* palette ) + ft_black_set_mode( PRaster raster, + unsigned long mode, + const char* palette ) { #ifdef FT_RASTER_OPTION_ANTI_ALIASING @@ -3319,14 +3501,18 @@ static const char count_table[256] = if ( !raster || !raster->buffer || !raster->buffer_size ) return Raster_Err_Not_Ini; + if ( !outline ) + return Raster_Err_Invalid; + /* return immediately if the outline is empty */ if ( outline->n_points == 0 || outline->n_contours <= 0 ) return Raster_Err_None; - if ( !outline || !outline->contours || !outline->points ) + if ( !outline->contours || !outline->points ) return Raster_Err_Invalid; - if ( outline->n_points != outline->contours[outline->n_contours - 1] + 1 ) + if ( outline->n_points != + outline->contours[outline->n_contours - 1] + 1 ) return Raster_Err_Invalid; worker = raster->worker; @@ -3335,35 +3521,43 @@ static const char count_table[256] = if ( params->flags & FT_RASTER_FLAG_DIRECT ) return Raster_Err_Unsupported; - if ( !target_map || !target_map->buffer ) + if ( !target_map ) return Raster_Err_Invalid; - ras.outline = *outline; - ras.target = *target_map; + /* nothing to do */ + if ( !target_map->width || !target_map->rows ) + return Raster_Err_None; + + if ( !target_map->buffer ) + return Raster_Err_Invalid; - worker->buff = (PLong) raster->buffer; - worker->sizeBuff = worker->buff + - raster->buffer_size / sizeof ( Long ); + ras.outline = *outline; + ras.target = *target_map; + + worker->buff = (PLong) raster->buffer; + worker->sizeBuff = worker->buff + + raster->buffer_size / sizeof ( Long ); #ifdef FT_RASTER_OPTION_ANTI_ALIASING - worker->grays = raster->grays; - worker->gray_width = raster->gray_width; + worker->grays = raster->grays; + worker->gray_width = raster->gray_width; + + FT_MEM_ZERO( worker->gray_lines, worker->gray_width * 2 ); #endif - return ( ( params->flags & FT_RASTER_FLAG_AA ) - ? Render_Gray_Glyph( RAS_VAR ) - : Render_Glyph( RAS_VAR ) ); + return ( params->flags & FT_RASTER_FLAG_AA ) + ? Render_Gray_Glyph( RAS_VAR ) + : Render_Glyph( RAS_VAR ); } - const FT_Raster_Funcs ft_standard_raster = - { + FT_DEFINE_RASTER_FUNCS( ft_standard_raster, FT_GLYPH_FORMAT_OUTLINE, (FT_Raster_New_Func) ft_black_new, (FT_Raster_Reset_Func) ft_black_reset, (FT_Raster_Set_Mode_Func)ft_black_set_mode, (FT_Raster_Render_Func) ft_black_render, (FT_Raster_Done_Func) ft_black_done - }; + ) /* END */ diff --git a/src/freetype2/raster/ftrend1.c b/src/freetype2/raster/ftrend1.c index 3cc8d07..1ed8af6 100644 --- a/src/freetype2/raster/ftrend1.c +++ b/src/freetype2/raster/ftrend1.c @@ -21,6 +21,7 @@ #include FT_OUTLINE_H #include "ftrend1.h" #include "ftraster.h" +#include "rastpic.h" #include "rasterrs.h" @@ -118,6 +119,7 @@ } /* check rendering mode */ +#ifndef FT_CONFIG_OPTION_PIC if ( mode != FT_RENDER_MODE_MONO ) { /* raster1 is only capable of producing monochrome bitmaps */ @@ -130,6 +132,25 @@ if ( render->clazz == &ft_raster5_renderer_class ) return Raster_Err_Cannot_Render_Glyph; } +#else /* FT_CONFIG_OPTION_PIC */ + /* When PIC is enabled, we cannot get to the class object */ + /* so instead we check the final character in the class name */ + /* ("raster5" or "raster1"). Yes this is a hack. */ + /* The "correct" thing to do is have different render function */ + /* for each of the classes. */ + if ( mode != FT_RENDER_MODE_MONO ) + { + /* raster1 is only capable of producing monochrome bitmaps */ + if ( render->clazz->root.module_name[6] == '1' ) + return Raster_Err_Cannot_Render_Glyph; + } + else + { + /* raster5 is only capable of producing 5-gray-levels bitmaps */ + if ( render->clazz->root.module_name[6] == '5' ) + return Raster_Err_Cannot_Render_Glyph; + } +#endif /* FT_CONFIG_OPTION_PIC */ outline = &slot->outline; @@ -208,10 +229,8 @@ } - FT_CALLBACK_TABLE_DEF - const FT_Renderer_Class ft_raster1_renderer_class = - { - { + FT_DEFINE_RENDERER(ft_raster1_renderer_class, + FT_MODULE_RENDERER, sizeof( FT_RendererRec ), @@ -224,7 +243,7 @@ (FT_Module_Constructor)ft_raster1_init, (FT_Module_Destructor) 0, (FT_Module_Requester) 0 - }, + , FT_GLYPH_FORMAT_OUTLINE, @@ -233,18 +252,17 @@ (FT_Renderer_GetCBoxFunc) ft_raster1_get_cbox, (FT_Renderer_SetModeFunc) ft_raster1_set_mode, - (FT_Raster_Funcs*) &ft_standard_raster - }; + (FT_Raster_Funcs*) &FT_STANDARD_RASTER_GET + ) /* This renderer is _NOT_ part of the default modules; you will need */ /* to register it by hand in your application. It should only be */ /* used for backwards-compatibility with FT 1.x anyway. */ /* */ - FT_CALLBACK_TABLE_DEF - const FT_Renderer_Class ft_raster5_renderer_class = - { - { + FT_DEFINE_RENDERER(ft_raster5_renderer_class, + + FT_MODULE_RENDERER, sizeof( FT_RendererRec ), @@ -257,7 +275,7 @@ (FT_Module_Constructor)ft_raster1_init, (FT_Module_Destructor) 0, (FT_Module_Requester) 0 - }, + , FT_GLYPH_FORMAT_OUTLINE, @@ -266,8 +284,8 @@ (FT_Renderer_GetCBoxFunc) ft_raster1_get_cbox, (FT_Renderer_SetModeFunc) ft_raster1_set_mode, - (FT_Raster_Funcs*) &ft_standard_raster - }; + (FT_Raster_Funcs*) &FT_STANDARD_RASTER_GET + ) /* END */ diff --git a/src/freetype2/raster/ftrend1.h b/src/freetype2/raster/ftrend1.h index 76e9a5f..4cf1286 100644 --- a/src/freetype2/raster/ftrend1.h +++ b/src/freetype2/raster/ftrend1.h @@ -27,13 +27,13 @@ FT_BEGIN_HEADER - FT_EXPORT_VAR( const FT_Renderer_Class ) ft_raster1_renderer_class; + FT_DECLARE_RENDERER( ft_raster1_renderer_class ) /* this renderer is _NOT_ part of the default modules, you'll need */ /* to register it by hand in your application. It should only be */ /* used for backwards-compatibility with FT 1.x anyway. */ /* */ - FT_EXPORT_VAR( const FT_Renderer_Class ) ft_raster5_renderer_class; + FT_DECLARE_RENDERER( ft_raster5_renderer_class ) FT_END_HEADER diff --git a/src/freetype2/raster/raster.c b/src/freetype2/raster/raster.c index f13a67a..1202a11 100644 --- a/src/freetype2/raster/raster.c +++ b/src/freetype2/raster/raster.c @@ -19,6 +19,7 @@ #define FT_MAKE_OPTION_SINGLE_OBJECT #include <ft2build.h> +#include "rastpic.c" #include "ftraster.c" #include "ftrend1.c" diff --git a/src/freetype2/raster/rastpic.c b/src/freetype2/raster/rastpic.c new file mode 100644 index 0000000..3c26487 --- /dev/null +++ b/src/freetype2/raster/rastpic.c @@ -0,0 +1,89 @@ +/***************************************************************************/ +/* */ +/* rastpic.c */ +/* */ +/* The FreeType position independent code services for raster module. */ +/* */ +/* Copyright 2009 by */ +/* Oran Agra and Mickey Gabel. */ +/* */ +/* This file is part of the FreeType project, and may only be used, */ +/* modified, and distributed under the terms of the FreeType project */ +/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ +/* this file you indicate that you have read the license and */ +/* understand and accept it fully. */ +/* */ +/***************************************************************************/ + + +#include <ft2build.h> +#include FT_FREETYPE_H +#include FT_INTERNAL_OBJECTS_H +#include "rastpic.h" + +#ifdef FT_CONFIG_OPTION_PIC + + /* forward declaration of PIC init functions from ftraster.c */ + void FT_Init_Class_ft_standard_raster(FT_Raster_Funcs*); + + void + ft_raster1_renderer_class_pic_free( FT_Library library ) + { + FT_PIC_Container* pic_container = &library->pic_container; + FT_Memory memory = library->memory; + if ( pic_container->raster ) + { + RasterPIC* container = (RasterPIC*)pic_container->raster; + if(--container->ref_count) + return; + FT_FREE( container ); + pic_container->raster = NULL; + } + } + + + FT_Error + ft_raster1_renderer_class_pic_init( FT_Library library ) + { + FT_PIC_Container* pic_container = &library->pic_container; + FT_Error error = FT_Err_Ok; + RasterPIC* container; + FT_Memory memory = library->memory; + + /* since this function also serve raster5 renderer, + it implements reference counting */ + if(pic_container->raster) + { + ((RasterPIC*)pic_container->raster)->ref_count++; + return error; + } + + /* allocate pointer, clear and set global container pointer */ + if ( FT_ALLOC ( container, sizeof ( *container ) ) ) + return error; + FT_MEM_SET( container, 0, sizeof(*container) ); + pic_container->raster = container; + container->ref_count = 1; + + /* initialize pointer table - this is how the module usually expects this data */ + FT_Init_Class_ft_standard_raster(&container->ft_standard_raster); +/*Exit:*/ + if(error) + ft_raster1_renderer_class_pic_free(library); + return error; + } + + /* re-route these init and free functions to the above functions */ + FT_Error ft_raster5_renderer_class_pic_init(FT_Library library) + { + return ft_raster1_renderer_class_pic_init(library); + } + void ft_raster5_renderer_class_pic_free(FT_Library library) + { + ft_raster1_renderer_class_pic_free(library); + } + +#endif /* FT_CONFIG_OPTION_PIC */ + + +/* END */ diff --git a/src/freetype2/raster/rastpic.h b/src/freetype2/raster/rastpic.h new file mode 100644 index 0000000..dcd82b8 --- /dev/null +++ b/src/freetype2/raster/rastpic.h @@ -0,0 +1,50 @@ +/***************************************************************************/ +/* */ +/* rastpic.h */ +/* */ +/* The FreeType position independent code services for raster module. */ +/* */ +/* Copyright 2009 by */ +/* Oran Agra and Mickey Gabel. */ +/* */ +/* This file is part of the FreeType project, and may only be used, */ +/* modified, and distributed under the terms of the FreeType project */ +/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ +/* this file you indicate that you have read the license and */ +/* understand and accept it fully. */ +/* */ +/***************************************************************************/ + + +#ifndef __RASTPIC_H__ +#define __RASTPIC_H__ + + +FT_BEGIN_HEADER + +#include FT_INTERNAL_PIC_H + +#ifndef FT_CONFIG_OPTION_PIC +#define FT_STANDARD_RASTER_GET ft_standard_raster + +#else /* FT_CONFIG_OPTION_PIC */ + + typedef struct RasterPIC_ + { + int ref_count; + FT_Raster_Funcs ft_standard_raster; + } RasterPIC; + +#define GET_PIC(lib) ((RasterPIC*)((lib)->pic_container.raster)) +#define FT_STANDARD_RASTER_GET (GET_PIC(library)->ft_standard_raster) + +#endif /* FT_CONFIG_OPTION_PIC */ + + /* */ + +FT_END_HEADER + +#endif /* __RASTPIC_H__ */ + + +/* END */ |