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freetype2
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freetype2/tests/gview.c

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#include <nirvana.h>
#include NV_VIEWPORT_H
#include <stdio.h>
#include <ft2build.h>
#include FT_FREETYPE_H
/* include FreeType internals to debug hints */
#include <../src/pshinter/pshrec.h>
#include <../src/pshinter/pshalgo.h>
#include <../src/autohint/ahtypes.h>
/************************************************************************/
/************************************************************************/
/***** *****/
/***** ROOT DEFINITIONS *****/
/***** *****/
/************************************************************************/
/************************************************************************/
#include <time.h> /* for clock() */
/* SunOS 4.1.* does not define CLOCKS_PER_SEC, so include <sys/param.h> */
/* to get the HZ macro which is the equivalent. */
#if defined( __sun__ ) && !defined( SVR4 ) && !defined( __SVR4 )
#include <sys/param.h>
#define CLOCKS_PER_SEC HZ
#endif
static int first_glyph = 0;
static NV_Renderer renderer;
static NV_Painter painter;
static NV_Pixmap target;
static NV_Error error;
static NV_Memory memory;
static NVV_Display display;
static NVV_Surface surface;
static FT_Library freetype;
static FT_Face face;
static NV_Pos glyph_scale;
static NV_Pos glyph_org_x;
static NV_Pos glyph_org_y;
static NV_Transform glyph_transform; /* font units -> device pixels */
static NV_Transform size_transform; /* subpixels -> device pixels */
static NV_Scale grid_scale = 1.0;
static int glyph_index;
static int pixel_size = 12;
/************************************************************************/
/************************************************************************/
/***** *****/
/***** OPTIONS, COLORS and OTHERS *****/
/***** *****/
/************************************************************************/
/************************************************************************/
static int option_show_axis = 1;
static int option_show_dots = 1;
static int option_show_stroke = 0;
static int option_show_glyph = 1;
static int option_show_grid = 1;
static int option_show_em = 0;
static int option_show_smooth = 1;
static int option_show_blues = 0;
static int option_show_edges = 0;
static int option_show_segments = 1;
static int option_show_links = 1;
static int option_show_indices = 0;
static int option_show_ps_hints = 1;
static int option_show_horz_hints = 1;
static int option_show_vert_hints = 1;
static int option_hinting = 1;
static char temp_message[1024];
static NV_Path symbol_dot = NULL;
static NV_Path symbol_circle = NULL;
static NV_Path symbol_square = NULL;
static NV_Path symbol_rect_h = NULL;
static NV_Path symbol_rect_v = NULL;
#define AXIS_COLOR 0xFFFF0000
#define GRID_COLOR 0xFFD0D0D0
#define ON_COLOR 0xFFFF2000
#define OFF_COLOR 0xFFFF0080
#define STRONG_COLOR 0xFF404040
#define INTERP_COLOR 0xFF206040
#define SMOOTH_COLOR 0xF000B040
#define BACKGROUND_COLOR 0xFFFFFFFF
#define TEXT_COLOR 0xFF000000
#define EM_COLOR 0x80008000
#define BLUES_TOP_COLOR 0x4000008F
#define BLUES_BOT_COLOR 0x40008F00
#define GHOST_HINT_COLOR 0xE00000FF
#define STEM_HINT_COLOR 0xE02020FF
#define STEM_JOIN_COLOR 0xE020FF20
#define EDGE_COLOR 0xF0704070
#define SEGMENT_COLOR 0xF0206040
#define LINK_COLOR 0xF0FFFF00
#define SERIF_LINK_COLOR 0xF0FF808F
/* print message and abort program */
static void
Panic( const char* message )
{
fprintf( stderr, "PANIC: %s\n", message );
exit(1);
}
static void
init_symbols( void )
{
nv_path_new_rectangle( renderer, -1, -1, 3, 3, 0, 0, &symbol_square );
nv_path_new_rectangle( renderer, -1, -6, 2, 12, 0, 0, &symbol_rect_v );
nv_path_new_rectangle( renderer, -6, -1, 12, 2, 0, 0, &symbol_rect_h );
nv_path_new_circle( renderer, 0, 0, 3., &symbol_dot );
nv_path_stroke( symbol_dot, 0.6,
nv_path_linecap_butt,
nv_path_linejoin_miter, 1.,
&symbol_circle );
nv_path_destroy( symbol_dot );
nv_path_new_circle( renderer, 0, 0, 2., &symbol_dot );
}
static void
done_symbols( void )
{
nv_path_destroy( symbol_circle );
nv_path_destroy( symbol_dot );
nv_path_destroy( symbol_rect_v );
nv_path_destroy( symbol_rect_h );
nv_path_destroy( symbol_square );
}
/************************************************************************/
/************************************************************************/
/***** *****/
/***** COMMON GRID DRAWING ROUTINES *****/
/***** *****/
/************************************************************************/
/************************************************************************/
static void
reset_scale( NV_Scale scale )
{
/* compute font units -> grid pixels scale factor */
glyph_scale = target->width*0.75 / face->units_per_EM * scale;
/* setup font units -> grid pixels transform */
nv_transform_set_scale( &glyph_transform, glyph_scale, -glyph_scale );
glyph_org_x = glyph_transform.delta.x = target->width*0.125;
glyph_org_y = glyph_transform.delta.y = target->height*0.875;
/* setup subpixels -> grid pixels transform */
nv_transform_set_scale(
&size_transform,
glyph_scale / nv_fromfixed( face->size->metrics.x_scale ),
-glyph_scale / nv_fromfixed( face->size->metrics.y_scale ) );
size_transform.delta = glyph_transform.delta;
}
static void
reset_size( int pixel_size,
NV_Scale scale )
{
FT_Set_Pixel_Sizes( face, pixel_size, pixel_size );
reset_scale( scale );
}
static void
clear_background( void )
{
nv_pixmap_fill_rect( target, 0, 0, target->width, target->height,
BACKGROUND_COLOR );
}
static void
draw_grid( void )
{
int x = (int)glyph_org_x;
int y = (int)glyph_org_y;
/* draw grid */
if ( option_show_grid )
{
NV_Scale min, max, x, step;
/* draw vertical grid bars */
step = 64. * size_transform.matrix.xx;
if ( step > 1. )
{
min = max = glyph_org_x;
while ( min - step >= 0 ) min -= step;
while ( max + step < target->width ) max += step;
for ( x = min; x <= max; x += step )
nv_pixmap_fill_rect( target, (NV_Int)(x + .5), 0,
1, target->height, GRID_COLOR );
}
/* draw horizontal grid bars */
step = -64. * size_transform.matrix.yy;
if ( step > 1. )
{
min = max = glyph_org_y;
while ( min - step >= 0 ) min -= step;
while ( max + step < target->height ) max += step;
for ( x = min; x <= max; x += step )
nv_pixmap_fill_rect( target, 0, (NV_Int)(x + .5),
target->width, 1, GRID_COLOR );
}
}
/* draw axis */
if ( option_show_axis )
{
nv_pixmap_fill_rect( target, x, 0, 1, target->height, AXIS_COLOR );
nv_pixmap_fill_rect( target, 0, y, target->width, 1, AXIS_COLOR );
}
if ( option_show_em )
{
NV_Path path;
NV_Path stroke;
NV_UInt units = (NV_UInt)face->units_per_EM;
nv_path_new_rectangle( renderer, 0, 0, units, units, 0, 0, &path );
nv_path_transform( path, &glyph_transform );
nv_path_stroke( path, 1.5, nv_path_linecap_butt, nv_path_linejoin_miter,
4.0, &stroke );
nv_painter_set_color( painter, EM_COLOR, 256 );
nv_painter_fill_path( painter, NULL, 0, stroke );
nv_path_destroy( stroke );
nv_path_destroy( path );
}
}
/************************************************************************/
/************************************************************************/
/***** *****/
/***** POSTSCRIPT GLOBALS ROUTINES *****/
/***** *****/
/************************************************************************/
/************************************************************************/
#include <../src/pshinter/pshglob.h>
static void
draw_ps_blue_zones( void )
{
if ( option_show_blues && ps_debug_globals )
{
PSH_Blues blues = &ps_debug_globals->blues;
PSH_Blue_Table table;
NV_Vector v;
FT_Int y1, y2;
FT_UInt count;
PSH_Blue_Zone zone;
/* draw top zones */
table = &blues->normal_top;
count = table->count;
zone = table->zones;
for ( ; count > 0; count--, zone++ )
{
v.x = 0;
if ( !ps_debug_no_horz_hints )
{
v.y = zone->cur_ref + zone->cur_delta;
nv_vector_transform( &v, &size_transform );
}
else
{
v.y = zone->org_ref + zone->org_delta;
nv_vector_transform( &v, &glyph_transform );
}
y1 = (int)(v.y + 0.5);
v.x = 0;
if ( !ps_debug_no_horz_hints )
{
v.y = zone->cur_ref;
nv_vector_transform( &v, &size_transform );
}
else
{
v.y = zone->org_ref;
nv_vector_transform( &v, &glyph_transform );
}
y2 = (int)(v.y + 0.5);
nv_pixmap_fill_rect( target, 0, y1,
target->width, y2-y1+1,
BLUES_TOP_COLOR );
#if 0
printf( "top [%.3f %.3f]\n", zone->cur_bottom/64.0, zone->cur_top/64.0 );
#endif
}
/* draw bottom zones */
table = &blues->normal_bottom;
count = table->count;
zone = table->zones;
for ( ; count > 0; count--, zone++ )
{
v.x = 0;
v.y = zone->cur_ref;
nv_vector_transform( &v, &size_transform );
y1 = (int)(v.y + 0.5);
v.x = 0;
v.y = zone->cur_ref + zone->cur_delta;
nv_vector_transform( &v, &size_transform );
y2 = (int)(v.y + 0.5);
nv_pixmap_fill_rect( target, 0, y1,
target->width, y2 - y1 + 1,
BLUES_BOT_COLOR );
#if 0
printf( "bot [%.3f %.3f]\n", zone->cur_bottom/64.0, zone->cur_top/64.0 );
#endif
}
}
}
/************************************************************************/
/************************************************************************/
/***** *****/
/***** POSTSCRIPT HINTER ALGORITHM ROUTINES *****/
/***** *****/
/************************************************************************/
/************************************************************************/
#include <../src/pshinter/pshalgo.h>
static void
draw_ps_hint( PSH_Hint hint,
FT_Bool vertical )
{
int x1, x2;
NV_Vector v;
if ( pshint_vertical != vertical )
{
if ( vertical )
pshint_cpos = 40;
else
pshint_cpos = 10;
pshint_vertical = vertical;
}
if ( !vertical )
{
if ( !option_show_vert_hints )
return;
v.x = hint->cur_pos;
v.y = 0;
nv_vector_transform( &v, &size_transform );
x1 = (int)(v.x + 0.5);
v.x = hint->cur_pos + hint->cur_len;
v.y = 0;
nv_vector_transform( &v, &size_transform );
x2 = (int)(v.x + 0.5);
nv_pixmap_fill_rect( target, x1, 0, 1, target->height,
psh_hint_is_ghost( hint )
? GHOST_HINT_COLOR : STEM_HINT_COLOR );
if ( psh_hint_is_ghost( hint ) )
{
x1 --;
x2 = x1 + 2;
}
else
nv_pixmap_fill_rect( target, x2, 0, 1, target->height,
psh_hint_is_ghost( hint )
? GHOST_HINT_COLOR : STEM_HINT_COLOR );
nv_pixmap_fill_rect( target, x1, pshint_cpos, x2 + 1 - x1, 1,
STEM_JOIN_COLOR );
}
else
{
if ( !option_show_horz_hints )
return;
v.y = hint->cur_pos;
v.x = 0;
nv_vector_transform( &v, &size_transform );
x1 = (int)(v.y + 0.5);
v.y = hint->cur_pos + hint->cur_len;
v.x = 0;
nv_vector_transform( &v, &size_transform );
x2 = (int)(v.y + 0.5);
nv_pixmap_fill_rect( target, 0, x1, target->width, 1,
psh_hint_is_ghost( hint )
? GHOST_HINT_COLOR : STEM_HINT_COLOR );
if ( psh_hint_is_ghost( hint ) )
{
x1 --;
x2 = x1 + 2;
}
else
nv_pixmap_fill_rect( target, 0, x2, target->width, 1,
psh_hint_is_ghost(hint)
? GHOST_HINT_COLOR : STEM_HINT_COLOR );
nv_pixmap_fill_rect( target, pshint_cpos, x2, 1, x1 + 1 - x2,
STEM_JOIN_COLOR );
}
#if 0
printf( "[%7.3f %7.3f] %c\n", hint->cur_pos/64.0, (hint->cur_pos+hint->cur_len)/64.0, vertical ? 'v' : 'h' );
#endif
pshint_cpos += 10;
}
static void
ps_draw_control_points( void )
{
if ( ps_debug_glyph )
{
PSH_Glyph glyph = ps_debug_glyph;
PSH_Point point = glyph->points;
FT_UInt count = glyph->num_points;
NV_Transform transform, *trans = &transform;
NV_Path vert_rect;
NV_Path horz_rect;
NV_Path dot, circle;
for ( ; count > 0; count--, point++ )
{
NV_Vector vec;
vec.x = point->cur_x;
vec.y = point->cur_y;
nv_vector_transform( &vec, &size_transform );
nv_transform_set_translate( trans, vec.x, vec.y );
if ( option_show_smooth && !psh_point_is_smooth(point) )
{
nv_painter_set_color( painter, SMOOTH_COLOR, 256 );
nv_painter_fill_path( painter, trans, 0, symbol_circle );
}
if ( option_show_horz_hints )
{
if ( point->flags_y & PSH_POINT_STRONG )
{
nv_painter_set_color( painter, STRONG_COLOR, 256 );
nv_painter_fill_path( painter, trans, 0, symbol_rect_h );
}
}
if ( option_show_vert_hints )
{
if ( point->flags_x & PSH_POINT_STRONG )
{
nv_painter_set_color( painter, STRONG_COLOR, 256 );
nv_painter_fill_path( painter, trans, 0, symbol_rect_v );
}
}
}
}
}
static void
ps_print_hints( void )
{
if ( ps_debug_hints )
{
FT_Int dimension;
for ( dimension = 1; dimension >= 0; dimension-- )
{
PS_Dimension dim = &ps_debug_hints->dimension[ dimension ];
PS_Mask mask = dim->masks.masks;
FT_UInt count = dim->masks.num_masks;
printf( "%s hints -------------------------\n",
dimension ? "vertical" : "horizontal" );
for ( ; count > 0; count--, mask++ )
{
FT_UInt index;
printf( "mask -> %d\n", mask->end_point );
for ( index = 0; index < mask->num_bits; index++ )
{
if ( mask->bytes[ index >> 3 ] & (0x80 >> (index & 7)) )
{
PS_Hint hint = dim->hints.hints + index;
printf( "%c [%3d %3d (%4d)]\n", dimension ? "v" : "h",
hint->pos, hint->pos + hint->len, hint->len );
}
}
}
}
}
}
/************************************************************************/
/************************************************************************/
/***** *****/
/***** AUTOHINTER DRAWING ROUTINES *****/
/***** *****/
/************************************************************************/
/************************************************************************/
static NV_Path
ah_link_path( NV_Vector* p1,
NV_Vector* p4,
NV_Bool vertical )
{
NV_PathWriter writer;
NV_Vector p2, p3;
NV_Path path, stroke;
if ( vertical )
{
p2.x = p4->x;
p2.y = p1->y;
p3.x = p1->x;
p3.y = p4->y;
}
else
{
p2.x = p1->x;
p2.y = p4->y;
p3.x = p4->x;
p3.y = p1->y;
}
nv_path_writer_new( renderer, &writer );
nv_path_writer_moveto( writer, p1 );
nv_path_writer_cubicto( writer, &p2, &p3, p4 );
nv_path_writer_end( writer );
path = nv_path_writer_get_path( writer );
nv_path_writer_destroy( writer );
nv_path_stroke( path, 1.,
nv_path_linecap_butt, nv_path_linejoin_round,
1., &stroke );
nv_path_destroy( path );
return stroke;
}
static void
ah_draw_smooth_points( void )
{
if ( ah_debug_hinter && option_show_smooth )
{
AH_Outline glyph = ah_debug_hinter->glyph;
FT_UInt count = glyph->num_points;
AH_Point point = glyph->points;
nv_painter_set_color( painter, SMOOTH_COLOR, 256 );
for ( ; count > 0; count--, point++ )
{
if ( !( point->flags & AH_FLAG_WEAK_INTERPOLATION ) )
{
NV_Transform transform, *trans = &transform;
NV_Vector vec;
vec.x = point->x - ah_debug_hinter->pp1.x;
vec.y = point->y;
nv_vector_transform( &vec, &size_transform );
nv_transform_set_translate( &transform, vec.x, vec.y );
nv_painter_fill_path( painter, trans, 0, symbol_circle );
}
}
}
}
static void
ah_draw_edges( void )
{
if ( ah_debug_hinter )
{
AH_Outline glyph = ah_debug_hinter->glyph;
FT_UInt count;
AH_Edge edge;
FT_Pos pp1 = ah_debug_hinter->pp1.x;
nv_painter_set_color( painter, EDGE_COLOR, 256 );
if ( option_show_edges )
{
/* draw vertical edges */
if ( option_show_vert_hints )
{
count = glyph->num_vedges;
edge = glyph->vert_edges;
for ( ; count > 0; count--, edge++ )
{
NV_Vector vec;
NV_Pos x;
vec.x = edge->pos - pp1;
vec.y = 0;
nv_vector_transform( &vec, &size_transform );
x = (FT_Pos)( vec.x + 0.5 );
nv_pixmap_fill_rect( target, x, 0, 1, target->height, EDGE_COLOR );
}
}
/* draw horizontal edges */
if ( option_show_horz_hints )
{
count = glyph->num_hedges;
edge = glyph->horz_edges;
for ( ; count > 0; count--, edge++ )
{
NV_Vector vec;
NV_Pos x;
vec.x = 0;
vec.y = edge->pos;
nv_vector_transform( &vec, &size_transform );
x = (FT_Pos)( vec.y + 0.5 );
nv_pixmap_fill_rect( target, 0, x, target->width, 1, EDGE_COLOR );
}
}
}
if ( option_show_segments )
{
/* draw vertical segments */
if ( option_show_vert_hints )
{
AH_Segment seg = glyph->vert_segments;
FT_UInt count = glyph->num_vsegments;
for ( ; count > 0; count--, seg++ )
{
AH_PointRec *first, *last;
NV_Vector v1, v2;
NV_Pos y1, y2, x;
first = seg->first;
last = seg->last;
v1.x = v2.x = first->x - pp1;
if ( first->y <= last->y )
{
v1.y = first->y;
v2.y = last->y;
}
else
{
v1.y = last->y;
v2.y = first->y;
}
nv_vector_transform( &v1, &size_transform );
nv_vector_transform( &v2, &size_transform );
y1 = (NV_Pos)( v1.y + 0.5 );
y2 = (NV_Pos)( v2.y + 0.5 );
x = (NV_Pos)( v1.x + 0.5 );
nv_pixmap_fill_rect( target, x - 1, y2, 3,
ABS( y1 - y2 ) + 1, SEGMENT_COLOR );
}
}
/* draw horizontal segments */
if ( option_show_horz_hints )
{
AH_Segment seg = glyph->horz_segments;
FT_UInt count = glyph->num_hsegments;
for ( ; count > 0; count--, seg++ )
{
AH_PointRec *first, *last;
NV_Vector v1, v2;
NV_Pos y1, y2, x;
first = seg->first;
last = seg->last;
v1.y = v2.y = first->y;
if ( first->x <= last->x )
{
v1.x = first->x - pp1;
v2.x = last->x - pp1;
}
else
{
v1.x = last->x - pp1;
v2.x = first->x - pp1;
}
nv_vector_transform( &v1, &size_transform );
nv_vector_transform( &v2, &size_transform );
y1 = (NV_Pos)( v1.x + 0.5 );
y2 = (NV_Pos)( v2.x + 0.5 );
x = (NV_Pos)( v1.y + 0.5 );
nv_pixmap_fill_rect( target, y1, x - 1,
ABS( y1 - y2 ) + 1, 3, SEGMENT_COLOR );
}
}
if ( option_show_vert_hints && option_show_links )
{
AH_Segment seg = glyph->vert_segments;
FT_UInt count = glyph->num_vsegments;
for ( ; count > 0; count--, seg++ )
{
AH_Segment seg2 = NULL;
NV_Path link;
NV_Vector v1, v2;
if ( seg->link )
{
if ( seg->link > seg )
seg2 = seg->link;
}
else if ( seg->serif )
seg2 = seg->serif;
if ( seg2 )
{
v1.x = seg->first->x - pp1;
v2.x = seg2->first->x - pp1;
v1.y = ( seg->first->y + seg->last->y ) / 2;
v2.y = ( seg2->first->y + seg2->last->y ) / 2;
link = ah_link_path( &v1, &v2, 1 );
nv_painter_set_color( painter,
seg->serif ? SERIF_LINK_COLOR : LINK_COLOR,
256 );
nv_painter_fill_path( painter, &size_transform, 0, link );
nv_path_destroy( link );
}
}
}
if ( option_show_horz_hints && option_show_links )
{
AH_Segment seg = glyph->horz_segments;
FT_UInt count = glyph->num_hsegments;
for ( ; count > 0; count--, seg++ )
{
AH_Segment seg2 = NULL;
NV_Path link;
NV_Vector v1, v2;
if ( seg->link )
{
if ( seg->link > seg )
seg2 = seg->link;
}
else if ( seg->serif )
seg2 = seg->serif;
if ( seg2 )
{
v1.y = seg->first->y;
v2.y = seg2->first->y;
v1.x = ( seg->first->x + seg->last->x ) / 2 - pp1;
v2.x = ( seg2->first->x + seg2->last->x ) / 2 - pp1;
link = ah_link_path( &v1, &v2, 0 );
nv_painter_set_color( painter,
seg->serif ? SERIF_LINK_COLOR : LINK_COLOR,
256 );
nv_painter_fill_path( painter, &size_transform, 0, link );
nv_path_destroy( link );
}
}
}
}
}
}
/************************************************************************/
/************************************************************************/
/***** *****/
/***** MAIN LOOP(S) *****/
/***** *****/
/************************************************************************/
/************************************************************************/
static void
draw_glyph( int glyph_index )
{
NV_Path path;
pshint_vertical = -1;
ps_debug_hint_func = option_show_ps_hints ? draw_ps_hint : 0;
ah_debug_hinter = NULL;
error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_BITMAP );
if ( error )
Panic( "could not load glyph" );
if ( face->glyph->format != FT_GLYPH_FORMAT_OUTLINE )
Panic( "could not load glyph outline" );
error = nv_path_new_from_outline( renderer,
(NV_Outline*)&face->glyph->outline,
&size_transform,
&path );
if ( error )
Panic( "could not create glyph path" );
/* trac<61> du glyphe plein */
if ( option_show_glyph )
{
nv_painter_set_color( painter, 0xFF404080, 128 );
nv_painter_fill_path( painter, 0, 0, path );
}
if ( option_show_stroke )
{
NV_Path stroke;
error = nv_path_stroke( path, 0.6,
nv_path_linecap_butt,
nv_path_linejoin_miter,
1.0, &stroke );
if ( error )
Panic( "could not stroke glyph path" );
nv_painter_set_color( painter, 0xFF000040, 256 );
nv_painter_fill_path( painter, 0, 0, stroke );
nv_path_destroy( stroke );
}
/* trac<61> des points de controle */
if ( option_show_dots )
{
NV_Path plot;
NV_Outline out;
NV_Scale r = 2;
NV_Int n, first, last;
nv_path_get_outline( path, NULL, memory, &out );
first = 0;
for ( n = 0; n < out.n_contours; n++ )
{
int m;
NV_Transform trans;
NV_Color color;
NV_SubVector* vec;
last = out.contours[n];
for ( m = first; m <= last; m++ )
{
color = (out.tags[m] & FT_CURVE_TAG_ON)
? ON_COLOR
: OFF_COLOR;
vec = out.points + m;
nv_transform_set_translate( &trans, vec->x / 64.0, vec->y / 64.0 );
nv_painter_set_color( painter, color, 256 );
nv_painter_fill_path( painter, &trans, 0, symbol_dot );
if ( option_show_indices )
{
char temp[5];
sprintf( temp, "%d", m );
nv_pixmap_cell_text( target, vec->x / 64 + 4, vec->y / 64 - 4,
temp, TEXT_COLOR );
}
}
first = last + 1;
}
}
ah_draw_smooth_points();
ah_draw_edges();
nv_path_destroy( path );
/* autre infos */
{
char temp[1024];
char temp2[64];
sprintf( temp, "font name : %s (%s)", face->family_name,
face->style_name );
nv_pixmap_cell_text( target, 0, 0, temp, TEXT_COLOR );
FT_Get_Glyph_Name( face, glyph_index, temp2, 63 );
temp2[63] = 0;
sprintf( temp, "glyph %4d: %s", glyph_index, temp2 );
nv_pixmap_cell_text( target, 0, 8, temp, TEXT_COLOR );
if ( temp_message[0] )
{
nv_pixmap_cell_text( target, 0, 16, temp_message, TEXT_COLOR );
temp_message[0] = 0;
}
}
}
#define TOGGLE_OPTION(var,prefix) \
do \
{ \
var = !var; \
sprintf( temp_message, prefix " is now %s", \
var ? "on" : "off" ); \
} \
while()
#define TOGGLE_OPTION_NEG(var,prefix) \
do \
{ \
var = !var; \
sprintf( temp_message, prefix " is now %s", \
!var ? "on" : "off" ); \
} \
while
static void
handle_event( NVV_EventRec* ev )
{
switch ( ev->key )
{
case NVV_Key_Left:
if ( glyph_index > 0 )
glyph_index--;
break;
case NVV_Key_Right:
if ( glyph_index + 1 < face->num_glyphs )
glyph_index++;
break;
case NVV_KEY( 'x' ):
TOGGLE_OPTION( option_show_axis, "grid axis display" );
break;
case NVV_KEY( 's' ):
TOGGLE_OPTION( option_show_stroke, "glyph stroke display" );
break;
case NVV_KEY( 'g' ):
TOGGLE_OPTION( option_show_glyph, "glyph fill display" );
break;
case NVV_KEY( 'd' ):
TOGGLE_OPTION( option_show_dots, "control points display" );
break
case NVV_KEY( 'e' ):
TOGGLE_OPTION( option_show_em, "EM square display" );
break;
case NVV_KEY( '+' ):
grid_scale *= 1.2;
reset_scale( grid_scale );
break;
case NVV_KEY( '-' ):
if ( grid_scale > 0.3 )
{
grid_scale /= 1.2;
reset_scale( grid_scale );
}
break;
case NVV_Key_Up:
pixel_size++;
reset_size( pixel_size, grid_scale );
sprintf( temp_message, "pixel size = %d", pixel_size );
break;
case NVV_Key_Down:
if ( pixel_size > 1 )
{
pixel_size--;
reset_size( pixel_size, grid_scale );
sprintf( temp_message, "pixel size = %d", pixel_size );
}
break;
case NVV_KEY( 'z' ):
TOGGLE_OPTION_NEG( ps_debug_no_vert_hints, "vertical hints processing" );
break;
case NVV_KEY( 'a' ):
TOGGLE_OPTION_NEG( ps_debug_no_horz_hints, "horizontal hints processing" );
break;
case NVV_KEY( 'Z' ):
TOGGLE_OPTION( option_show_vert_hints, "vertical hints display" );
break;
case NVV_KEY( 'A' ):
TOGGLE_OPTION( option_show_horz_hints, "horizontal hints display" );
break;
case NVV_KEY( 'S' ):
TOGGLE_OPTION( option_show_smooth, "smooth points display" );
break;
case NVV_KEY( 'i' ):
TOGGLE_OPTION( option_show_indices, "point index display" );
break;
case NVV_KEY( 'b' ):
TOGGLE_OPTION( option_show_blues, "blue zones display" );
break;
case NVV_KEY( 'h' ):
ps_debug_no_horz_hints = option_hinting;
ps_debug_no_vert_hints = option_hinting;
TOGGLE_OPTION( option_hinting, "hinting" );
break;
case NVV_KEY( 'H' ):
ps_print_hints();
break;
default:
;
}
}
static void
usage()
{
Panic( "no usage" );
}
#define OPTION1(n,code) \
case n : \
code \
argc--; \
argv++; \
break;
#define OPTION2(n,code) \
case n : \
code \
argc -= 2; \
argv += 2; \
break;
static void
parse_options( int* argc_p,
char*** argv_p )
{
int argc = *argc_p;
char** argv = *argv_p;
while ( argc > 2 && argv[1][0] == '-' )
{
switch ( argv[1][1] )
{
OPTION2( 'f', first_glyph = atoi( argv[2] ); )
OPTION2( 's', pixel_size = atoi( argv[2] ); )
default:
usage();
}
}
*argc_p = argc;
*argv_p = argv;
}
int
main( int argc,
char** argv )
{
char* filename = "/winnt/fonts/arial.ttf";
parse_options( &argc, &argv );
if ( argc >= 2 )
filename = argv[1];
/* create library */
error = nv_renderer_new( 0, &renderer );
if ( error )
Panic( "could not create Nirvana renderer" );
memory = nv_renderer_get_memory( renderer );
init_symbols();
error = nvv_display_new( renderer, &display );
if ( error )
Panic( "could not create display" );
error = nvv_surface_new( display, 460, 460, nv_pixmap_type_argb, &surface );
if ( error )
Panic( "could not create surface" );
target = nvv_surface_get_pixmap( surface );
error = nv_painter_new( renderer, &painter );
if ( error )
Panic( "could not create painter" );
nv_painter_set_target( painter, target );
clear_background();
error = FT_Init_FreeType( &freetype );
if ( error )
Panic( "could not initialize FreeType" );
error = FT_New_Face( freetype, filename, 0, &face );
if ( error )
Panic( "could not open font face" );
reset_size( pixel_size, grid_scale );
nvv_surface_set_title( surface, "FreeType Glyph Viewer" );
{
NVV_EventRec event;
glyph_index = first_glyph;
for ( ;; )
{
clear_background();
draw_grid();
ps_debug_hints = 0;
ah_debug_hinter = 0;
ah_debug_disable_vert = ps_debug_no_vert_hints;
ah_debug_disable_horz = ps_debug_no_horz_hints;
draw_ps_blue_zones();
draw_glyph( glyph_index );
ps_draw_control_points();
nvv_surface_refresh( surface, NULL );
nvv_surface_listen( surface, 0, &event );
if ( event.key == NVV_Key_Esc )
break;
handle_event( &event );
switch ( event.key )
{
case NVV_Key_Esc:
goto Exit;
default:
;
}
}
}
Exit:
/* wait for escape */
/* destroy display (and surface) */
nvv_display_unref( display );
done_symbols();
nv_renderer_unref( renderer );
return 0;
}
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