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Whitespace & documentation improvements.

This commit is contained in:
Werner Lemberg 2009-06-18 15:48:21 +02:00
parent 7227114043
commit 8262213192
1 changed files with 69 additions and 66 deletions
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135
src/raster/ftraster.c
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@ -73,13 +73,15 @@
/* profile is simply an array of scanline intersections on a given */ /* profile is simply an array of scanline intersections on a given */
/* dimension. A profile's main attributes are */ /* 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 */ /* 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 */ /* 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 */ /* 2 - Sweeping the target map's scanlines in order to compute segment */
/* `spans' which are then filled. Additionally, this pass */ /* `spans' which are then filled. Additionally, this pass */
@ -89,15 +91,15 @@
/* built from the bottom of the render pool, used as a stack. The */ /* built from the bottom of the render pool, used as a stack. The */
/* following graphics shows the profile list under construction: */ /* following graphics shows the profile list under construction: */
/* */ /* */
/* ____________________________________________________________ _ _ */ /* __________________________________________________________ _ _ */
/* | | | | | */ /* | | | | | */
/* | profile | coordinates for | profile | coordinates for |--> */ /* | profile | coordinates for | profile | coordinates for |--> */
/* | 1 | profile 1 | 2 | profile 2 |--> */ /* | 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. */ /* The top of the profile stack is kept in the `top' variable. */
/* */ /* */
@ -200,7 +202,8 @@
#define ft_memset memset #define ft_memset memset
#else /* _STANDALONE_ */
#else /* !_STANDALONE_ */
#include FT_INTERNAL_OBJECTS_H #include FT_INTERNAL_OBJECTS_H
@ -216,7 +219,7 @@
#define Raster_Err_Unsupported Raster_Err_Cannot_Render_Glyph #define Raster_Err_Unsupported Raster_Err_Cannot_Render_Glyph
#endif /* _STANDALONE_ */ #endif /* !_STANDALONE_ */
#ifndef FT_MEM_SET #ifndef FT_MEM_SET
@ -374,7 +377,7 @@
#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, #define RAS_ARGS PWorker worker,
@ -386,7 +389,7 @@
#define FT_UNUSED_RASTER FT_UNUSED( worker ) #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;
@ -419,65 +422,65 @@
#define IS_BOTTOM_OVERSHOOT( x ) ( CEILING( x ) - x >= ras.precision_half ) #define IS_BOTTOM_OVERSHOOT( x ) ( CEILING( x ) - x >= ras.precision_half )
#define IS_TOP_OVERSHOOT( x ) ( x - FLOOR( x ) >= ras.precision_half ) #define IS_TOP_OVERSHOOT( x ) ( x - FLOOR( x ) >= ras.precision_half )
/* Note that I have moved the location of some fields in the */ /* The most used variables are positioned at the top of the structure. */
/* structure to ensure that the most used variables are used */ /* Thus, their offset can be coded with less opcodes, resulting in a */
/* at the top. Thus, their offset can be coded with less */ /* smaller executable. */
/* opcodes, and it results in a smaller executable. */
struct TWorker_ struct TWorker_
{ {
Int precision_bits; /* precision related variables */ Int precision_bits; /* precision related variables */
Int precision; Int precision;
Int precision_half; Int precision_half;
Long precision_mask; Long precision_mask;
Int precision_shift; Int precision_shift;
Int precision_step; Int precision_step;
Int precision_jitter; Int precision_jitter;
Int scale_shift; /* == precision_shift for bitmaps */ Int scale_shift; /* == precision_shift for bitmaps */
/* == precision_shift+1 for pixmaps */ /* == precision_shift+1 for pixmaps */
PLong buff; /* The profiles buffer */ PLong buff; /* The profiles buffer */
PLong sizeBuff; /* Render pool size */ PLong sizeBuff; /* Render pool size */
PLong maxBuff; /* Profiles buffer size */ PLong maxBuff; /* Profiles buffer size */
PLong top; /* Current cursor in buffer */ 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 */ UShort bWidth; /* target bitmap width */
PByte bTarget; /* target bitmap buffer */ PByte bTarget; /* target bitmap buffer */
PByte gTarget; /* target pixmap 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 */ Bool fresh; /* signals a fresh new profile which */
/* `start' field must be completed */ /* `start' field must be completed */
Bool joint; /* signals that the last arc ended */ Bool joint; /* signals that the last arc ended */
/* exactly on a scanline. Allows */ /* exactly on a scanline. Allows */
/* removal of doublets */ /* removal of doublets */
PProfile cProfile; /* current profile */ PProfile cProfile; /* current profile */
PProfile fProfile; /* head of linked list of profiles */ PProfile fProfile; /* head of linked list of profiles */
PProfile gProfile; /* contour's first profile in case */ PProfile gProfile; /* contour's first profile in case */
/* of impact */ /* of impact */
TStates state; /* rendering state */ TStates state; /* rendering state */
FT_Bitmap target; /* description of target bit/pixmap */ FT_Bitmap target; /* description of target bit/pixmap */
FT_Outline outline; FT_Outline outline;
Long traceOfs; /* current offset in target bitmap */ Long traceOfs; /* current offset in target bitmap */
Long traceG; /* current offset in target pixmap */ 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_min_x; /* current min x during gray rendering */
Short gray_max_x; /* current max x during gray rendering */ Short gray_max_x; /* current max x during gray rendering */
/* dispatch variables */ /* dispatch variables */
@ -486,31 +489,31 @@
Function_Sweep_Span* Proc_Sweep_Drop; Function_Sweep_Span* Proc_Sweep_Drop;
Function_Sweep_Step* Proc_Sweep_Step; 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 */ /* should be performed to control */
/* drop-out accurately when calling */ /* drop-out accurately when calling */
/* Render_Glyph. Note that there is */ /* Render_Glyph. Note that there is */
/* no horizontal pass during gray */ /* no horizontal pass during gray */
/* rendering. */ /* 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 */ TBand band_stack[16]; /* band stack used for sub-banding */
Int band_top; /* band stack top */ Int band_top; /* band stack top */
#ifdef FT_RASTER_OPTION_ANTI_ALIASING #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 */ /* Intermediate table used to render the */
/* graylevels pixmaps. */ /* graylevels pixmaps. */
/* gray_lines is a buffer holding two */ /* gray_lines is a buffer holding two */
/* monochrome scanlines */ /* 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. */ /* intermediate scanline of gray_lines. */
/* Each gray pixel takes 2 bits long there */ /* Each gray pixel takes 2 bits long there */
@ -524,12 +527,12 @@
typedef struct TRaster_ typedef struct TRaster_
{ {
char* buffer; char* buffer;
long buffer_size; long buffer_size;
void* memory; void* memory;
PWorker worker; PWorker worker;
Byte grays[5]; Byte grays[5];
Short gray_width; Short gray_width;
} TRaster, *PRaster; } TRaster, *PRaster;
@ -538,11 +541,11 @@
static TWorker cur_ras; static TWorker cur_ras;
#define ras cur_ras #define ras cur_ras
#else #else /* !FT_STATIC_RASTER */
#define ras (*worker) #define ras (*worker)
#endif /* FT_STATIC_RASTER */ #endif /* !FT_STATIC_RASTER */
#ifdef FT_RASTER_OPTION_ANTI_ALIASING #ifdef FT_RASTER_OPTION_ANTI_ALIASING