* src/smooth/ftgrays: "setjmp/longjmp" is now used for rollback (i.e.
when memory pool overflow occurs), function names are now all prefixed with "gray_", and a new type (TArea) is defined to store area value in each cell (using "int" was too small on 16-bit systems)..
This commit is contained in:
David Turner
parent
21939455dc
commit
c4f622c341
|
|
@ -1,3 +1,10 @@
|
|||
2001-10-07 David Turner <david@freetype.org>
|
||||
|
||||
* src/smooth/ftgrays: "setjmp/longjmp" is now used for rollback (i.e.
|
||||
when memory pool overflow occurs), function names are now all prefixed
|
||||
with "gray_", and a new type (TArea) is defined to store area value in
|
||||
each cell (using "int" was too small on 16-bit systems)..
|
||||
|
||||
2001-09-20 Detlef Würkner <TetiSoft@apg.lahn.de>
|
||||
|
||||
* builds/amiga/*: Added port to Amiga with the SAS/C compiler.
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
/* */
|
||||
/* A new `perfect' anti-aliasing renderer (body). */
|
||||
/* */
|
||||
/* Copyright 2000-2001 by */
|
||||
/* Copyright 2000 by */
|
||||
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
|
||||
/* */
|
||||
/* This file is part of the FreeType project, and may only be used, */
|
||||
|
|
@ -32,8 +32,8 @@
|
|||
/* cc -c -D_STANDALONE_ ftgrays.c */
|
||||
/* */
|
||||
/* The renderer can be initialized with a call to */
|
||||
/* `ft_grays_raster.grays_raster_new'; an anti-aliased bitmap can be */
|
||||
/* generated with a call to `ft_grays_raster.grays_raster_render'. */
|
||||
/* `ft_gray_raster.gray_raster_new'; an anti-aliased bitmap can be */
|
||||
/* generated with a call to `ft_gray_raster.gray_raster_render'. */
|
||||
/* */
|
||||
/* See the comments and documentation in the file `ftimage.h' for */
|
||||
/* more details on how the raster works. */
|
||||
|
|
@ -82,7 +82,7 @@
|
|||
|
||||
|
||||
#include <string.h> /* for memcpy() */
|
||||
|
||||
#include <setjmp.h>
|
||||
|
||||
/*************************************************************************/
|
||||
/* */
|
||||
|
|
@ -94,6 +94,8 @@
|
|||
#define FT_COMPONENT trace_aaraster
|
||||
|
||||
|
||||
#define ErrRaster_MemoryOverflow -4
|
||||
|
||||
#ifdef _STANDALONE_
|
||||
|
||||
|
||||
|
|
@ -199,9 +201,35 @@
|
|||
/* */
|
||||
/* TYPE DEFINITIONS */
|
||||
/* */
|
||||
|
||||
/* don't change the following types to FT_Int or FT_Pos, since we might */
|
||||
/* need to define them to "float" or "double" when experimenting with */
|
||||
/* new algorithms.. */
|
||||
|
||||
typedef int TScan; /* integer scanline/pixel coordinate */
|
||||
typedef long TPos; /* sub-pixel coordinate */
|
||||
|
||||
/* determine the type used to store cell areas. This normally takes at */
|
||||
/* least PIXEL_BYTES*2 + 1, on 16-bit systems, we need to use 'longs' */
|
||||
/* instead of 'ints'.. otherwise bad things happen.. */
|
||||
|
||||
#if PIXEL_BITS <= 7
|
||||
|
||||
typedef int TArea;
|
||||
|
||||
#else /* PIXEL_BITS >= 8 */
|
||||
|
||||
/* approximately determine the size of integers using an ANSI-C header */
|
||||
# include <limits.h>
|
||||
# if UINT_MAX == 0xFFFFU
|
||||
typedef long TArea;
|
||||
# else
|
||||
typedef int TArea;
|
||||
# endif
|
||||
|
||||
#endif /* PIXEL_BITS >= 8 */
|
||||
|
||||
|
||||
/* maximal number of gray spans in a call to the span callback */
|
||||
#define FT_MAX_GRAY_SPANS 32
|
||||
|
||||
|
|
@ -224,7 +252,7 @@
|
|||
TScan x;
|
||||
TScan y;
|
||||
int cover;
|
||||
int area;
|
||||
TArea area;
|
||||
|
||||
} TCell, *PCell;
|
||||
|
||||
|
|
@ -240,7 +268,7 @@
|
|||
TScan min_ex, max_ex;
|
||||
TScan min_ey, max_ey;
|
||||
|
||||
int area;
|
||||
TArea area;
|
||||
int cover;
|
||||
int invalid;
|
||||
|
||||
|
|
@ -264,12 +292,13 @@
|
|||
void* render_span_data;
|
||||
int span_y;
|
||||
|
||||
int band_size;
|
||||
int band_shoot;
|
||||
int conic_level;
|
||||
int cubic_level;
|
||||
int band_size;
|
||||
int band_shoot;
|
||||
int conic_level;
|
||||
int cubic_level;
|
||||
|
||||
void* memory;
|
||||
void* memory;
|
||||
jmp_buf jump_buffer;
|
||||
|
||||
} TRaster, *PRaster;
|
||||
|
||||
|
|
@ -279,8 +308,8 @@
|
|||
/* Initialize the cells table. */
|
||||
/* */
|
||||
static void
|
||||
init_cells( RAS_ARG_ void* buffer,
|
||||
long byte_size )
|
||||
gray_init_cells( RAS_ARG_ void* buffer,
|
||||
long byte_size )
|
||||
{
|
||||
ras.cells = (PCell)buffer;
|
||||
ras.max_cells = byte_size / sizeof ( TCell );
|
||||
|
|
@ -296,10 +325,11 @@
|
|||
/* Compute the outline bounding box. */
|
||||
/* */
|
||||
static void
|
||||
compute_cbox( RAS_ARG_ FT_Outline* outline )
|
||||
gray_compute_cbox( RAS_ARG )
|
||||
{
|
||||
FT_Vector* vec = outline->points;
|
||||
FT_Vector* limit = vec + outline->n_points;
|
||||
FT_Outline* outline = &ras.outline;
|
||||
FT_Vector* vec = outline->points;
|
||||
FT_Vector* limit = vec + outline->n_points;
|
||||
|
||||
|
||||
if ( outline->n_points <= 0 )
|
||||
|
|
@ -338,8 +368,8 @@
|
|||
/* */
|
||||
/* Record the current cell in the table. */
|
||||
/* */
|
||||
static int
|
||||
record_cell( RAS_ARG )
|
||||
static void
|
||||
gray_record_cell( RAS_ARG )
|
||||
{
|
||||
PCell cell;
|
||||
|
||||
|
|
@ -347,7 +377,7 @@
|
|||
if ( !ras.invalid && ( ras.area | ras.cover ) )
|
||||
{
|
||||
if ( ras.num_cells >= ras.max_cells )
|
||||
return 1;
|
||||
longjmp( ras.jump_buffer, 1 );
|
||||
|
||||
cell = ras.cells + ras.num_cells++;
|
||||
cell->x = ras.ex - ras.min_ex;
|
||||
|
|
@ -355,8 +385,6 @@
|
|||
cell->area = ras.area;
|
||||
cell->cover = ras.cover;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -364,9 +392,9 @@
|
|||
/* */
|
||||
/* Set the current cell to a new position. */
|
||||
/* */
|
||||
static int
|
||||
set_cell( RAS_ARG_ TScan ex,
|
||||
TScan ey )
|
||||
static void
|
||||
gray_set_cell( RAS_ARG_ TScan ex,
|
||||
TScan ey )
|
||||
{
|
||||
int invalid, record, clean;
|
||||
|
||||
|
|
@ -402,8 +430,8 @@
|
|||
|
||||
/* record the previous cell if needed (i.e., if we changed the cell */
|
||||
/* position, of changed the `invalid' flag) */
|
||||
if ( ( ras.invalid != invalid || record ) && record_cell( RAS_VAR ) )
|
||||
return 1;
|
||||
if ( ras.invalid != invalid || record )
|
||||
gray_record_cell( RAS_VAR );
|
||||
|
||||
if ( clean )
|
||||
{
|
||||
|
|
@ -414,7 +442,6 @@
|
|||
ras.invalid = invalid;
|
||||
ras.ex = ex;
|
||||
ras.ey = ey;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -423,8 +450,8 @@
|
|||
/* Start a new contour at a given cell. */
|
||||
/* */
|
||||
static void
|
||||
start_cell( RAS_ARG_ TScan ex,
|
||||
TScan ey )
|
||||
gray_start_cell( RAS_ARG_ TScan ex,
|
||||
TScan ey )
|
||||
{
|
||||
if ( ex < ras.min_ex )
|
||||
ex = ras.min_ex - 1;
|
||||
|
|
@ -436,7 +463,7 @@
|
|||
ras.last_ey = SUBPIXELS( ey );
|
||||
ras.invalid = 0;
|
||||
|
||||
(void)set_cell( RAS_VAR_ ex, ey );
|
||||
gray_set_cell( RAS_VAR_ ex, ey );
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -444,12 +471,12 @@
|
|||
/* */
|
||||
/* Render a scanline as one or more cells. */
|
||||
/* */
|
||||
static int
|
||||
render_scanline( RAS_ARG_ TScan ey,
|
||||
TPos x1,
|
||||
TScan y1,
|
||||
TPos x2,
|
||||
TScan y2 )
|
||||
static void
|
||||
gray_render_scanline( RAS_ARG_ TScan ey,
|
||||
TPos x1,
|
||||
TScan y1,
|
||||
TPos x2,
|
||||
TScan y2 )
|
||||
{
|
||||
TScan ex1, ex2, fx1, fx2, delta;
|
||||
long p, first, dx;
|
||||
|
|
@ -465,16 +492,19 @@
|
|||
|
||||
/* trivial case. Happens often */
|
||||
if ( y1 == y2 )
|
||||
return set_cell( RAS_VAR_ ex2, ey );
|
||||
{
|
||||
gray_set_cell( RAS_VAR_ ex2, ey );
|
||||
return;
|
||||
}
|
||||
|
||||
/* everything is located in a single cell. That is easy! */
|
||||
/* */
|
||||
if ( ex1 == ex2 )
|
||||
{
|
||||
delta = y2 - y1;
|
||||
ras.area += ( fx1 + fx2 ) * delta;
|
||||
ras.area += (TArea)( fx1 + fx2 ) * delta;
|
||||
ras.cover += delta;
|
||||
return 0;
|
||||
return;
|
||||
}
|
||||
|
||||
/* ok, we'll have to render a run of adjacent cells on the same */
|
||||
|
|
@ -500,12 +530,11 @@
|
|||
mod += dx;
|
||||
}
|
||||
|
||||
ras.area += ( fx1 + first ) * delta;
|
||||
ras.area += (TArea)( fx1 + first ) * delta;
|
||||
ras.cover += delta;
|
||||
|
||||
ex1 += incr;
|
||||
if ( set_cell( RAS_VAR_ ex1, ey ) )
|
||||
goto Error;
|
||||
gray_set_cell( RAS_VAR_ ex1, ey );
|
||||
y1 += delta;
|
||||
|
||||
if ( ex1 != ex2 )
|
||||
|
|
@ -531,23 +560,17 @@
|
|||
delta++;
|
||||
}
|
||||
|
||||
ras.area += ONE_PIXEL * delta;
|
||||
ras.area += (TArea)ONE_PIXEL * delta;
|
||||
ras.cover += delta;
|
||||
y1 += delta;
|
||||
ex1 += incr;
|
||||
if ( set_cell( RAS_VAR_ ex1, ey ) )
|
||||
goto Error;
|
||||
gray_set_cell( RAS_VAR_ ex1, ey );
|
||||
}
|
||||
}
|
||||
|
||||
delta = y2 - y1;
|
||||
ras.area += ( fx2 + ONE_PIXEL - first ) * delta;
|
||||
ras.area += (TArea)( fx2 + ONE_PIXEL - first ) * delta;
|
||||
ras.cover += delta;
|
||||
|
||||
return 0;
|
||||
|
||||
Error:
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -555,9 +578,9 @@
|
|||
/* */
|
||||
/* Render a given line as a series of scanlines. */
|
||||
/* */
|
||||
static int
|
||||
render_line( RAS_ARG_ TPos to_x,
|
||||
TPos to_y )
|
||||
static void
|
||||
gray_render_line( RAS_ARG_ TPos to_x,
|
||||
TPos to_y )
|
||||
{
|
||||
TScan ey1, ey2, fy1, fy2;
|
||||
TPos dx, dy, x, x2;
|
||||
|
|
@ -594,8 +617,7 @@
|
|||
/* everything is on a single scanline */
|
||||
if ( ey1 == ey2 )
|
||||
{
|
||||
if ( render_scanline( RAS_VAR_ ey1, ras.x, fy1, to_x, fy2 ) )
|
||||
goto Error;
|
||||
gray_render_scanline( RAS_VAR_ ey1, ras.x, fy1, to_x, fy2 );
|
||||
goto End;
|
||||
}
|
||||
|
||||
|
|
@ -621,12 +643,10 @@
|
|||
}
|
||||
|
||||
x = ras.x + delta;
|
||||
if ( render_scanline( RAS_VAR_ ey1, ras.x, fy1, x, first ) )
|
||||
goto Error;
|
||||
gray_render_scanline( RAS_VAR_ ey1, ras.x, fy1, x, first );
|
||||
|
||||
ey1 += incr;
|
||||
if ( set_cell( RAS_VAR_ TRUNC( x ), ey1 ) )
|
||||
goto Error;
|
||||
gray_set_cell( RAS_VAR_ TRUNC( x ), ey1 );
|
||||
|
||||
if ( ey1 != ey2 )
|
||||
{
|
||||
|
|
@ -651,34 +671,25 @@
|
|||
}
|
||||
|
||||
x2 = x + delta;
|
||||
if ( render_scanline( RAS_VAR_ ey1,
|
||||
x, ONE_PIXEL - first, x2, first ) )
|
||||
goto Error;
|
||||
gray_render_scanline( RAS_VAR_ ey1, x, ONE_PIXEL - first, x2, first );
|
||||
x = x2;
|
||||
|
||||
ey1 += incr;
|
||||
if ( set_cell( RAS_VAR_ TRUNC( x ), ey1 ) )
|
||||
goto Error;
|
||||
gray_set_cell( RAS_VAR_ TRUNC( x ), ey1 );
|
||||
}
|
||||
}
|
||||
|
||||
if ( render_scanline( RAS_VAR_ ey1,
|
||||
x, ONE_PIXEL - first, to_x, fy2 ) )
|
||||
goto Error;
|
||||
gray_render_scanline( RAS_VAR_ ey1, x, ONE_PIXEL - first, to_x, fy2 );
|
||||
|
||||
End:
|
||||
ras.x = to_x;
|
||||
ras.y = to_y;
|
||||
ras.last_ey = SUBPIXELS( ey2 );
|
||||
|
||||
return 0;
|
||||
|
||||
Error:
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
split_conic( FT_Vector* base )
|
||||
gray_split_conic( FT_Vector* base )
|
||||
{
|
||||
TPos a, b;
|
||||
|
||||
|
|
@ -697,9 +708,9 @@
|
|||
}
|
||||
|
||||
|
||||
static int
|
||||
render_conic( RAS_ARG_ FT_Vector* control,
|
||||
FT_Vector* to )
|
||||
static void
|
||||
gray_render_conic( RAS_ARG_ FT_Vector* control,
|
||||
FT_Vector* to )
|
||||
{
|
||||
TPos dx, dy;
|
||||
int top, level;
|
||||
|
|
@ -728,7 +739,7 @@
|
|||
if ( level <= 1 )
|
||||
{
|
||||
/* we compute the mid-point directly in order to avoid */
|
||||
/* calling split_conic() */
|
||||
/* calling gray_split_conic() */
|
||||
TPos to_x, to_y, mid_x, mid_y;
|
||||
|
||||
|
||||
|
|
@ -737,8 +748,9 @@
|
|||
mid_x = ( ras.x + to_x + 2 * UPSCALE( control->x ) ) / 4;
|
||||
mid_y = ( ras.y + to_y + 2 * UPSCALE( control->y ) ) / 4;
|
||||
|
||||
return render_line( RAS_VAR_ mid_x, mid_y ) ||
|
||||
render_line( RAS_VAR_ to_x, to_y );
|
||||
gray_render_line( RAS_VAR_ mid_x, mid_y );
|
||||
gray_render_line( RAS_VAR_ to_x, to_y );
|
||||
return;
|
||||
}
|
||||
|
||||
arc = ras.bez_stack;
|
||||
|
|
@ -775,7 +787,7 @@
|
|||
if ( TRUNC( min ) >= ras.max_ey || TRUNC( max ) < 0 )
|
||||
goto Draw;
|
||||
|
||||
split_conic( arc );
|
||||
gray_split_conic( arc );
|
||||
arc += 2;
|
||||
top++;
|
||||
levels[top] = levels[top - 1] = level - 1;
|
||||
|
|
@ -792,20 +804,19 @@
|
|||
mid_x = ( ras.x + to_x + 2 * arc[1].x ) / 4;
|
||||
mid_y = ( ras.y + to_y + 2 * arc[1].y ) / 4;
|
||||
|
||||
if ( render_line( RAS_VAR_ mid_x, mid_y ) ||
|
||||
render_line( RAS_VAR_ to_x, to_y ) )
|
||||
return 1;
|
||||
gray_render_line( RAS_VAR_ mid_x, mid_y );
|
||||
gray_render_line( RAS_VAR_ to_x, to_y );
|
||||
|
||||
top--;
|
||||
arc -= 2;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
split_cubic( FT_Vector* base )
|
||||
gray_split_cubic( FT_Vector* base )
|
||||
{
|
||||
TPos a, b, c, d;
|
||||
|
||||
|
|
@ -832,10 +843,10 @@
|
|||
}
|
||||
|
||||
|
||||
static int
|
||||
render_cubic( RAS_ARG_ FT_Vector* control1,
|
||||
FT_Vector* control2,
|
||||
FT_Vector* to )
|
||||
static void
|
||||
gray_render_cubic( RAS_ARG_ FT_Vector* control1,
|
||||
FT_Vector* control2,
|
||||
FT_Vector* to )
|
||||
{
|
||||
TPos dx, dy, da, db;
|
||||
int top, level;
|
||||
|
|
@ -885,8 +896,9 @@
|
|||
mid_y = ( ras.y + to_y +
|
||||
3 * UPSCALE( control1->y + control2->y ) ) / 8;
|
||||
|
||||
return render_line( RAS_VAR_ mid_x, mid_y ) ||
|
||||
render_line( RAS_VAR_ to_x, to_y );
|
||||
gray_render_line( RAS_VAR_ mid_x, mid_y );
|
||||
gray_render_line( RAS_VAR_ to_x, to_y );
|
||||
return;
|
||||
}
|
||||
|
||||
arc = ras.bez_stack;
|
||||
|
|
@ -924,7 +936,7 @@
|
|||
if ( y > max ) max = y;
|
||||
if ( TRUNC( min ) >= ras.max_ey || TRUNC( max ) < 0 )
|
||||
goto Draw;
|
||||
split_cubic( arc );
|
||||
gray_split_cubic( arc );
|
||||
arc += 3;
|
||||
top ++;
|
||||
levels[top] = levels[top - 1] = level - 1;
|
||||
|
|
@ -941,14 +953,13 @@
|
|||
mid_x = ( ras.x + to_x + 3 * ( arc[1].x + arc[2].x ) ) / 8;
|
||||
mid_y = ( ras.y + to_y + 3 * ( arc[1].y + arc[2].y ) ) / 8;
|
||||
|
||||
if ( render_line( RAS_VAR_ mid_x, mid_y ) ||
|
||||
render_line( RAS_VAR_ to_x, to_y ) )
|
||||
return 1;
|
||||
gray_render_line( RAS_VAR_ mid_x, mid_y );
|
||||
gray_render_line( RAS_VAR_ to_x, to_y );
|
||||
top --;
|
||||
arc -= 3;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -979,8 +990,8 @@
|
|||
/* a simple shell sort algorithm that works directly on our */
|
||||
/* cells table */
|
||||
static void
|
||||
shell_sort ( PCell cells,
|
||||
int count )
|
||||
gray_shell_sort ( PCell cells,
|
||||
int count )
|
||||
{
|
||||
PCell i, j, limit = cells + count;
|
||||
TCell temp;
|
||||
|
|
@ -1025,8 +1036,8 @@
|
|||
/* through a normal insertion sort */
|
||||
|
||||
static void
|
||||
quick_sort( PCell cells,
|
||||
int count )
|
||||
gray_quick_sort( PCell cells,
|
||||
int count )
|
||||
{
|
||||
PCell stack[40]; /* should be enough ;-) */
|
||||
PCell* top; /* top of stack */
|
||||
|
|
@ -1125,8 +1136,8 @@
|
|||
#ifdef DEBUG_SORT
|
||||
|
||||
static int
|
||||
check_sort( PCell cells,
|
||||
int count )
|
||||
gray_check_sort( PCell cells,
|
||||
int count )
|
||||
{
|
||||
PCell p, q;
|
||||
|
||||
|
|
@ -1145,19 +1156,21 @@
|
|||
|
||||
|
||||
static int
|
||||
Move_To( FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
gray_move_to( FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
{
|
||||
TPos x, y;
|
||||
|
||||
|
||||
/* record current cell, if any */
|
||||
record_cell( (PRaster)raster );
|
||||
gray_record_cell( (PRaster)raster );
|
||||
|
||||
/* start to a new position */
|
||||
x = UPSCALE( to->x );
|
||||
y = UPSCALE( to->y );
|
||||
start_cell( (PRaster)raster, TRUNC( x ), TRUNC( y ) );
|
||||
|
||||
gray_start_cell( (PRaster)raster, TRUNC( x ), TRUNC( y ) );
|
||||
|
||||
((PRaster)raster)->x = x;
|
||||
((PRaster)raster)->y = y;
|
||||
return 0;
|
||||
|
|
@ -1165,38 +1178,41 @@
|
|||
|
||||
|
||||
static int
|
||||
Line_To( FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
gray_line_to( FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
{
|
||||
return render_line( (PRaster)raster,
|
||||
UPSCALE( to->x ), UPSCALE( to->y ) );
|
||||
gray_render_line( (PRaster)raster,
|
||||
UPSCALE( to->x ), UPSCALE( to->y ) );
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
Conic_To( FT_Vector* control,
|
||||
FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
gray_conic_to( FT_Vector* control,
|
||||
FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
{
|
||||
return render_conic( (PRaster)raster, control, to );
|
||||
gray_render_conic( (PRaster)raster, control, to );
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
Cubic_To( FT_Vector* control1,
|
||||
FT_Vector* control2,
|
||||
FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
gray_cubic_to( FT_Vector* control1,
|
||||
FT_Vector* control2,
|
||||
FT_Vector* to,
|
||||
FT_Raster raster )
|
||||
{
|
||||
return render_cubic( (PRaster)raster, control1, control2, to );
|
||||
gray_render_cubic( (PRaster)raster, control1, control2, to );
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
grays_render_span( int y,
|
||||
int count,
|
||||
FT_Span* spans,
|
||||
PRaster raster )
|
||||
gray_render_span( int y,
|
||||
int count,
|
||||
FT_Span* spans,
|
||||
PRaster raster )
|
||||
{
|
||||
unsigned char* p;
|
||||
FT_Bitmap* map = &raster->target;
|
||||
|
|
@ -1229,7 +1245,7 @@
|
|||
#include <stdio.h>
|
||||
|
||||
static void
|
||||
dump_cells( RAS_ARG )
|
||||
gray_dump_cells( RAS_ARG )
|
||||
{
|
||||
PCell cell, limit;
|
||||
int y = -1;
|
||||
|
|
@ -1255,10 +1271,10 @@
|
|||
|
||||
|
||||
static void
|
||||
grays_hline( RAS_ARG_ TScan x,
|
||||
TScan y,
|
||||
TPos area,
|
||||
int acount )
|
||||
gray_hline( RAS_ARG_ TScan x,
|
||||
TScan y,
|
||||
TPos area,
|
||||
int acount )
|
||||
{
|
||||
FT_Span* span;
|
||||
int count;
|
||||
|
|
@ -1355,16 +1371,17 @@
|
|||
|
||||
|
||||
static void
|
||||
grays_sweep( RAS_ARG_ FT_Bitmap* target )
|
||||
gray_sweep( RAS_ARG_ FT_Bitmap* target )
|
||||
{
|
||||
TScan x, y, cover, area;
|
||||
TScan x, y, cover;
|
||||
TArea area;
|
||||
PCell start, cur, limit;
|
||||
|
||||
FT_UNUSED( target );
|
||||
|
||||
if ( ras.num_cells == 0 )
|
||||
return;
|
||||
|
||||
|
||||
cur = ras.cells;
|
||||
limit = cur + ras.num_cells;
|
||||
|
||||
|
|
@ -1396,7 +1413,7 @@
|
|||
/* individual gray pixel there */
|
||||
if ( area && x >= 0 )
|
||||
{
|
||||
grays_hline( RAS_VAR_ x, y, cover * ( ONE_PIXEL * 2 ) - area, 1 );
|
||||
gray_hline( RAS_VAR_ x, y, cover * ( ONE_PIXEL * 2 ) - area, 1 );
|
||||
x++;
|
||||
}
|
||||
|
||||
|
|
@ -1407,14 +1424,14 @@
|
|||
{
|
||||
/* draw a gray span between the start cell and the current one */
|
||||
if ( cur->x > x )
|
||||
grays_hline( RAS_VAR_ x, y,
|
||||
gray_hline( RAS_VAR_ x, y,
|
||||
cover * ( ONE_PIXEL * 2 ), cur->x - x );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* draw a gray span until the end of the clipping region */
|
||||
if ( cover && x < ras.max_ex - ras.min_ex )
|
||||
grays_hline( RAS_VAR_ x, y,
|
||||
gray_hline( RAS_VAR_ x, y,
|
||||
cover * ( ONE_PIXEL * 2 ),
|
||||
ras.max_ex - x - ras.min_ex );
|
||||
cover = 0;
|
||||
|
|
@ -1481,13 +1498,17 @@
|
|||
/* <Return> */
|
||||
/* Error code. 0 means sucess. */
|
||||
/* */
|
||||
static int
|
||||
FT_Outline_Decompose( FT_Outline* outline,
|
||||
const FT_Outline_Funcs* interface,
|
||||
void* user )
|
||||
static
|
||||
int FT_Outline_Decompose( FT_Outline* outline,
|
||||
const FT_Outline_Funcs* interface,
|
||||
void* user )
|
||||
{
|
||||
#undef SCALED
|
||||
#define SCALED( x ) ( ( (x) << shift ) - delta )
|
||||
#if 0
|
||||
# define SCALED( x ) ( ( (x) << shift ) - delta )
|
||||
#else
|
||||
# define SCALED( x) (x)
|
||||
#endif
|
||||
|
||||
FT_Vector v_last;
|
||||
FT_Vector v_control;
|
||||
|
|
@ -1502,8 +1523,10 @@
|
|||
int error;
|
||||
char tag; /* current point's state */
|
||||
|
||||
#if 0
|
||||
int shift = interface->shift;
|
||||
FT_Pos delta = interface->delta;
|
||||
#endif
|
||||
|
||||
|
||||
first = 0;
|
||||
|
|
@ -1692,19 +1715,38 @@
|
|||
|
||||
|
||||
static int
|
||||
grays_convert_glyph( RAS_ARG_ FT_Outline* outline )
|
||||
gray_convert_glyph_inner( RAS_ARG )
|
||||
{
|
||||
static
|
||||
const FT_Outline_Funcs interface =
|
||||
{
|
||||
(FT_Outline_MoveTo_Func) Move_To,
|
||||
(FT_Outline_LineTo_Func) Line_To,
|
||||
(FT_Outline_ConicTo_Func)Conic_To,
|
||||
(FT_Outline_CubicTo_Func)Cubic_To,
|
||||
(FT_Outline_MoveTo_Func) gray_move_to,
|
||||
(FT_Outline_LineTo_Func) gray_line_to,
|
||||
(FT_Outline_ConicTo_Func) gray_conic_to,
|
||||
(FT_Outline_CubicTo_Func) gray_cubic_to,
|
||||
0,
|
||||
0
|
||||
};
|
||||
|
||||
volatile int error = 0;
|
||||
|
||||
if ( setjmp( ras.jump_buffer ) == 0 )
|
||||
{
|
||||
error = FT_Outline_Decompose( &ras.outline, &interface, &ras );
|
||||
gray_record_cell( RAS_VAR );
|
||||
}
|
||||
else
|
||||
{
|
||||
error = ErrRaster_MemoryOverflow;
|
||||
}
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
gray_convert_glyph( RAS_ARG )
|
||||
{
|
||||
TBand bands[40], *band;
|
||||
int n, num_bands;
|
||||
TPos min, max, max_y;
|
||||
|
|
@ -1712,11 +1754,11 @@
|
|||
|
||||
|
||||
/* Set up state in the raster object */
|
||||
compute_cbox( RAS_VAR_ outline );
|
||||
gray_compute_cbox( RAS_VAR );
|
||||
|
||||
/* clip to target bitmap, exit if nothing to do */
|
||||
clip = &ras.clip_box;
|
||||
|
||||
|
||||
if ( ras.max_ex <= clip->xMin || ras.min_ex >= clip->xMax ||
|
||||
ras.max_ey <= clip->yMin || ras.min_ey >= clip->yMax )
|
||||
return 0;
|
||||
|
|
@ -1728,7 +1770,7 @@
|
|||
if ( ras.max_ey > clip->yMax ) ras.max_ey = clip->yMax;
|
||||
|
||||
/* simple heuristic used to speed-up the bezier decomposition -- see */
|
||||
/* the code in render_conic() and render_cubic() for more details */
|
||||
/* the code in gray_render_conic() and gray_render_cubic() for more details */
|
||||
ras.conic_level = 32;
|
||||
ras.cubic_level = 16;
|
||||
|
||||
|
|
@ -1776,26 +1818,32 @@
|
|||
ras.min_ey = band->min;
|
||||
ras.max_ey = band->max;
|
||||
|
||||
#if 1
|
||||
error = gray_convert_glyph_inner( RAS_VAR );
|
||||
#else
|
||||
error = FT_Outline_Decompose( outline, &interface, &ras ) ||
|
||||
record_cell( RAS_VAR );
|
||||
gray_record_cell( RAS_VAR );
|
||||
#endif
|
||||
|
||||
if ( !error )
|
||||
{
|
||||
#ifdef SHELL_SORT
|
||||
shell_sort( ras.cells, ras.num_cells );
|
||||
gray_shell_sort( ras.cells, ras.num_cells );
|
||||
#else
|
||||
quick_sort( ras.cells, ras.num_cells );
|
||||
gray_quick_sort( ras.cells, ras.num_cells );
|
||||
#endif
|
||||
|
||||
#ifdef DEBUG_GRAYS
|
||||
check_sort( ras.cells, ras.num_cells );
|
||||
dump_cells( RAS_VAR );
|
||||
gray_check_sort( ras.cells, ras.num_cells );
|
||||
gray_dump_cells( RAS_VAR );
|
||||
#endif
|
||||
|
||||
grays_sweep( RAS_VAR_ &ras.target );
|
||||
gray_sweep( RAS_VAR_ &ras.target );
|
||||
band--;
|
||||
continue;
|
||||
}
|
||||
else if ( error != ErrRaster_MemoryOverflow )
|
||||
return 1;
|
||||
|
||||
/* render pool overflow, we will reduce the render band by half */
|
||||
bottom = band->min;
|
||||
|
|
@ -1831,8 +1879,8 @@
|
|||
|
||||
|
||||
extern int
|
||||
grays_raster_render( PRaster raster,
|
||||
FT_Raster_Params* params )
|
||||
gray_raster_render( PRaster raster,
|
||||
FT_Raster_Params* params )
|
||||
{
|
||||
FT_Outline* outline = (FT_Outline*)params->source;
|
||||
FT_Bitmap* target_map = params->target;
|
||||
|
|
@ -1889,7 +1937,7 @@
|
|||
if ( target_map )
|
||||
ras.target = *target_map;
|
||||
|
||||
ras.render_span = (FT_Raster_Span_Func)grays_render_span;
|
||||
ras.render_span = (FT_Raster_Span_Func)gray_render_span;
|
||||
ras.render_span_data = &ras;
|
||||
|
||||
if ( params->flags & ft_raster_flag_direct )
|
||||
|
|
@ -1898,7 +1946,7 @@
|
|||
ras.render_span_data = params->user;
|
||||
}
|
||||
|
||||
return grays_convert_glyph( (PRaster)raster, outline );
|
||||
return gray_convert_glyph( (PRaster)raster );
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1908,8 +1956,8 @@
|
|||
#ifdef _STANDALONE_
|
||||
|
||||
static int
|
||||
grays_raster_new( void* memory,
|
||||
FT_Raster* araster )
|
||||
gray_raster_new( void* memory,
|
||||
FT_Raster* araster )
|
||||
{
|
||||
static TRaster the_raster;
|
||||
|
||||
|
|
@ -1924,7 +1972,7 @@
|
|||
|
||||
|
||||
static void
|
||||
grays_raster_done( FT_Raster raster )
|
||||
gray_raster_done( FT_Raster raster )
|
||||
{
|
||||
/* nothing */
|
||||
FT_UNUSED( raster );
|
||||
|
|
@ -1933,8 +1981,8 @@
|
|||
#else /* _STANDALONE_ */
|
||||
|
||||
static int
|
||||
grays_raster_new( FT_Memory memory,
|
||||
FT_Raster* araster )
|
||||
gray_raster_new( FT_Memory memory,
|
||||
FT_Raster* araster )
|
||||
{
|
||||
FT_Error error;
|
||||
PRaster raster;
|
||||
|
|
@ -1952,7 +2000,7 @@
|
|||
|
||||
|
||||
static void
|
||||
grays_raster_done( FT_Raster raster )
|
||||
gray_raster_done( FT_Raster raster )
|
||||
{
|
||||
FT_Memory memory = (FT_Memory)((PRaster)raster)->memory;
|
||||
|
||||
|
|
@ -1964,15 +2012,15 @@
|
|||
|
||||
|
||||
static void
|
||||
grays_raster_reset( FT_Raster raster,
|
||||
const char* pool_base,
|
||||
long pool_size )
|
||||
gray_raster_reset( FT_Raster raster,
|
||||
const char* pool_base,
|
||||
long pool_size )
|
||||
{
|
||||
PRaster rast = (PRaster)raster;
|
||||
|
||||
|
||||
if ( raster && pool_base && pool_size >= 4096 )
|
||||
init_cells( rast, (char*)pool_base, pool_size );
|
||||
gray_init_cells( rast, (char*)pool_base, pool_size );
|
||||
|
||||
rast->band_size = ( pool_size / sizeof ( TCell ) ) / 8;
|
||||
}
|
||||
|
|
@ -1982,11 +2030,11 @@
|
|||
{
|
||||
ft_glyph_format_outline,
|
||||
|
||||
(FT_Raster_New_Func) grays_raster_new,
|
||||
(FT_Raster_Reset_Func) grays_raster_reset,
|
||||
(FT_Raster_Set_Mode_Func)0,
|
||||
(FT_Raster_Render_Func) grays_raster_render,
|
||||
(FT_Raster_Done_Func) grays_raster_done
|
||||
(FT_Raster_New_Func) gray_raster_new,
|
||||
(FT_Raster_Reset_Func) gray_raster_reset,
|
||||
(FT_Raster_Set_Mode_Func) 0,
|
||||
(FT_Raster_Render_Func) gray_raster_render,
|
||||
(FT_Raster_Done_Func) gray_raster_done
|
||||
};
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue