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[Git][freetype/freetype][gsoc-anurag-2022-final] [dense] Add rasterizer


From: Anurag Thakur (@AdbhutDev)
Subject: [Git][freetype/freetype][gsoc-anurag-2022-final] [dense] Add rasterizer functions
Date: Sat, 19 Nov 2022 04:50:57 +0000

Anurag Thakur pushed to branch gsoc-anurag-2022-final at FreeType / FreeType

Commits:

  • 6a703329
    by Anurag Thakur at 2022-11-19T10:20:29+05:30
    [dense] Add rasterizer functions
    
    * src/dense/ftdense.c: (ONE_PIXEL, TRUNC, UPSCALE, DOWNSCALE,
    FT_MIN, FT_MAX, FT_ABS): New Macros
    
    (dense_move_to, dense_line_to, dense_conic_to): Added outline
    decomposing functions
    
    (dense_raster_new, dense_raster_done, dense_raster_reset,
    dense_raster_set_mode, dense_raster_render): Added interface
    functions
    

1 changed file:

Changes:

  • src/dense/ftdense.c
    1 1
     /** The rasterizer for the 'dense' renderer */
    
    2 2
     
    
    3
    -/* END */
    \ No newline at end of file
    3
    +#undef FT_COMPONENT
    
    4
    +#define FT_COMPONENT dense
    
    5
    +
    
    6
    +#include <freetype/ftoutln.h>
    
    7
    +#include <freetype/internal/ftcalc.h>
    
    8
    +#include <freetype/internal/ftdebug.h>
    
    9
    +#include <freetype/internal/ftobjs.h>
    
    10
    +#include <math.h>
    
    11
    +
    
    12
    +#include "ftdense.h"
    
    13
    +#include "ftdenseerrs.h"
    
    14
    +
    
    15
    +#define PIXEL_BITS 8
    
    16
    +
    
    17
    +#define ONE_PIXEL  ( 1 << PIXEL_BITS )
    
    18
    +#define TRUNC( x ) (int)( ( x ) >> PIXEL_BITS )
    
    19
    +
    
    20
    +#define UPSCALE( x )   ( ( x ) * ( ONE_PIXEL >> 6 ) )
    
    21
    +#define DOWNSCALE( x ) ( ( x ) >> ( PIXEL_BITS - 6 ) )
    
    22
    +
    
    23
    +#define FT_MIN( a, b )  ( (a) < (b) ? (a) : (b) )
    
    24
    +#define FT_MAX( a, b )  ( (a) > (b) ? (a) : (b) )
    
    25
    +#define FT_ABS( a )     ( (a) < 0 ? -(a) : (a) )
    
    26
    +
    
    27
    +
    
    28
    +typedef struct dense_TRaster_
    
    29
    +{
    
    30
    +  void* memory;
    
    31
    +
    
    32
    +} dense_TRaster, *dense_PRaster;
    
    33
    +
    
    34
    +
    
    35
    +static int
    
    36
    +dense_move_to( const FT_Vector* to, dense_worker* worker )
    
    37
    +{
    
    38
    +  FT_Pos x, y;
    
    39
    +
    
    40
    +  x              = UPSCALE( to->x );
    
    41
    +  y              = UPSCALE( to->y );
    
    42
    +  worker->prev_x = x;
    
    43
    +  worker->prev_y = y;
    
    44
    +  return 0;
    
    45
    +}
    
    46
    +
    
    47
    +static int
    
    48
    +dense_line_to( const FT_Vector* to, dense_worker* worker )
    
    49
    +{
    
    50
    +  dense_render_line( worker, UPSCALE( to->x ), UPSCALE( to->y ) );
    
    51
    +  dense_move_to( to, worker );
    
    52
    +  return 0;
    
    53
    +}
    
    54
    +
    
    55
    +void
    
    56
    +dense_render_line( dense_worker* worker, TPos tox, TPos toy )
    
    57
    +{
    
    58
    +  return;
    
    59
    +}
    
    60
    +
    
    61
    +static int
    
    62
    +dense_conic_to( const FT_Vector* control,
    
    63
    +                const FT_Vector* to,
    
    64
    +                dense_worker*    worker )
    
    65
    +{
    
    66
    +  dense_render_quadratic( worker, control, to );
    
    67
    +  return 0;
    
    68
    +}
    
    69
    +
    
    70
    +void
    
    71
    +dense_render_quadratic( dense_worker*    worker,
    
    72
    +                        FT_Vector* control,
    
    73
    +                        FT_Vector* to )
    
    74
    +{
    
    75
    +    return;
    
    76
    +}
    
    77
    +
    
    78
    +static int
    
    79
    +dense_cubic_to( const FT_Vector* control1,
    
    80
    +                const FT_Vector* control2,
    
    81
    +                const FT_Vector* to,
    
    82
    +                dense_worker*    worker )
    
    83
    +{
    
    84
    +  dense_render_cubic( worker, control1, control2, to );
    
    85
    +  return 0;
    
    86
    +}
    
    87
    +
    
    88
    +void
    
    89
    +dense_render_cubic( dense_worker* worker,
    
    90
    +                    FT_Vector*    control_1,
    
    91
    +                    FT_Vector*    control_2,
    
    92
    +                    FT_Vector*    to )
    
    93
    +{
    
    94
    +  return;
    
    95
    +}
    
    96
    +
    
    97
    +static int
    
    98
    +dense_raster_new( FT_Memory memory, dense_PRaster* araster )
    
    99
    +{
    
    100
    +  FT_Error      error;
    
    101
    +  dense_PRaster raster;
    
    102
    +
    
    103
    +  if ( !FT_NEW( raster ) )
    
    104
    +    raster->memory = memory;
    
    105
    +
    
    106
    +  *araster = raster;
    
    107
    +  return error;
    
    108
    +}
    
    109
    +
    
    110
    +static void
    
    111
    +dense_raster_done( FT_Raster raster )
    
    112
    +{
    
    113
    +  FT_Memory memory = (FT_Memory)( (dense_PRaster)raster )->memory;
    
    114
    +
    
    115
    +  FT_FREE( raster );
    
    116
    +}
    
    117
    +
    
    118
    +static void
    
    119
    +dense_raster_reset( FT_Raster      raster,
    
    120
    +                    unsigned char* pool_base,
    
    121
    +                    unsigned long  pool_size )
    
    122
    +{
    
    123
    +  FT_UNUSED( raster );
    
    124
    +  FT_UNUSED( pool_base );
    
    125
    +  FT_UNUSED( pool_size );
    
    126
    +}
    
    127
    +
    
    128
    +static int
    
    129
    +dense_raster_set_mode( FT_Raster raster, unsigned long mode, void* args )
    
    130
    +{
    
    131
    +  FT_UNUSED( raster );
    
    132
    +  FT_UNUSED( mode );
    
    133
    +  FT_UNUSED( args );
    
    134
    +
    
    135
    +  return 0; /* nothing to do */
    
    136
    +}
    
    137
    +
    
    138
    +FT_DEFINE_OUTLINE_FUNCS( dense_decompose_funcs,
    
    139
    +
    
    140
    +                         (FT_Outline_MoveTo_Func)dense_move_to,   /* move_to  */
    
    141
    +                         (FT_Outline_LineTo_Func)dense_line_to,   /* line_to  */
    
    142
    +                         (FT_Outline_ConicTo_Func)dense_conic_to, /* conic_to */
    
    143
    +                         (FT_Outline_CubicTo_Func)dense_cubic_to, /* cubic_to */
    
    144
    +
    
    145
    +                         0, /* shift    */
    
    146
    +                         0  /* delta    */
    
    147
    +)
    
    148
    +
    
    149
    +static int
    
    150
    +dense_render_glyph( dense_worker* worker, const FT_Bitmap* target )
    
    151
    +{
    
    152
    +  FT_Error error = FT_Outline_Decompose( &( worker->outline ),
    
    153
    +                                         &dense_decompose_funcs, worker );
    
    154
    +  return error;
    
    155
    +}
    
    156
    +
    
    157
    +static int
    
    158
    +dense_raster_render( FT_Raster raster, const FT_Raster_Params* params )
    
    159
    +{
    
    160
    +  return 0;
    
    161
    +}
    
    162
    +
    
    163
    +FT_DEFINE_RASTER_FUNCS(
    
    164
    +    ft_dense_raster,
    
    165
    +
    
    166
    +    FT_GLYPH_FORMAT_OUTLINE,
    
    167
    +
    
    168
    +    (FT_Raster_New_Func)dense_raster_new,           /* raster_new      */
    
    169
    +    (FT_Raster_Reset_Func)dense_raster_reset,       /* raster_reset    */
    
    170
    +    (FT_Raster_Set_Mode_Func)dense_raster_set_mode, /* raster_set_mode */
    
    171
    +    (FT_Raster_Render_Func)dense_raster_render,     /* raster_render   */
    
    172
    +    (FT_Raster_Done_Func)dense_raster_done          /* raster_done     */
    
    173
    +)
    
    174
    +
    
    175
    +/* END */


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