Ejemplo n.º 1
0
static cairo_status_t
twin_scaled_font_render_glyph (cairo_scaled_font_t  *scaled_font,
			       unsigned long         glyph,
			       cairo_t              *cr,
			       cairo_text_extents_t *metrics)
{
    double x1, y1, x2, y2, x3, y3;
    double marginl;
    twin_scaled_properties_t *props;
    twin_snap_info_t info;
    const int8_t *b;
    const int8_t *g;
    int8_t w;
    double gw;

    props = cairo_scaled_font_get_user_data (scaled_font, &twin_properties_key);

    /* Save glyph space, we need it when stroking */
    cairo_save (cr);

    /* center the pen */
    cairo_translate (cr, props->penx * .5, -props->peny * .5);

    /* small-caps */
    if (props->face_props->smallcaps && glyph >= 'a' && glyph <= 'z') {
	glyph += 'A' - 'a';
	/* 28 and 42 are small and capital letter heights of the glyph data */
	cairo_scale (cr, 1, 28. / 42);
    }

    /* slant */
    if (props->face_props->slant != CAIRO_FONT_SLANT_NORMAL) {
	cairo_matrix_t shear = { 1, 0, -.2, 1, 0, 0};
	cairo_transform (cr, &shear);
    }

    b = _cairo_twin_outlines +
	_cairo_twin_charmap[unlikely (glyph >= ARRAY_LENGTH (_cairo_twin_charmap)) ? 0 : glyph];
    g = twin_glyph_draw(b);
    w = twin_glyph_right(b);
    gw = F(w);

    marginl = props->marginl;

    /* monospace */
    if (props->face_props->monospace) {
	double monow = F(24);
	double extra =  props->penx + props->marginl + props->marginr;
	cairo_scale (cr, (monow + extra) / (gw + extra), 1);
	gw = monow;

	/* resnap margin for new transform */
	{
	    double x, y, x_scale, x_scale_inv;
	    x = 1; y = 0;
	    compute_hinting_scale (cr, x, y, &x_scale, &x_scale_inv);
	    marginl = SNAPXI (marginl);
	}
    }

    cairo_translate (cr, marginl, 0);

    /* stretch */
    cairo_scale (cr, props->stretch, 1);

    if (props->snap)
	twin_compute_snap (cr, &info, b);
    else
	info.n_snap_x = info.n_snap_y = 0;

    /* advance width */
    metrics->x_advance = gw * props->stretch + props->penx + props->marginl + props->marginr;

    /* glyph shape */
    for (;;) {
	switch (*g++) {
	case 'M':
	    cairo_close_path (cr);
	    /* fall through */
	case 'm':
	    x1 = SNAPX(*g++);
	    y1 = SNAPY(*g++);
	    cairo_move_to (cr, x1, y1);
	    continue;
	case 'L':
	    cairo_close_path (cr);
	    /* fall through */
	case 'l':
	    x1 = SNAPX(*g++);
	    y1 = SNAPY(*g++);
	    cairo_line_to (cr, x1, y1);
	    continue;
	case 'C':
	    cairo_close_path (cr);
	    /* fall through */
	case 'c':
	    x1 = SNAPX(*g++);
	    y1 = SNAPY(*g++);
	    x2 = SNAPX(*g++);
	    y2 = SNAPY(*g++);
	    x3 = SNAPX(*g++);
	    y3 = SNAPY(*g++);
	    cairo_curve_to (cr, x1, y1, x2, y2, x3, y3);
	    continue;
	case 'E':
	    cairo_close_path (cr);
	    /* fall through */
	case 'e':
	    cairo_restore (cr); /* restore glyph space */
	    cairo_set_tolerance (cr, 0.01);
	    cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
	    cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
	    cairo_set_line_width (cr, 1);
	    cairo_scale (cr, props->penx, props->peny);
	    cairo_stroke (cr);
	    break;
	case 'X':
	    /* filler */
	    continue;
	}
	break;
    }

    return CAIRO_STATUS_SUCCESS;
}
Ejemplo n.º 2
0
static cairo_status_t
twin_scaled_font_render_glyph (cairo_scaled_font_t  *scaled_font,
			       unsigned long         glyph,
			       cairo_t              *cr,
			       cairo_text_extents_t *metrics)
{
    double x1, y1, x2, y2, x3, y3;
    const int8_t *b = _cairo_twin_outlines +
		      _cairo_twin_charmap[glyph >= ARRAY_LENGTH (_cairo_twin_charmap) ? 0 : glyph];
    const int8_t *g = twin_glyph_draw(b);

    struct {
      cairo_bool_t snap;
      int snap_x;
      int snap_y;
      int n_snap_x;
      int n_snap_y;
    } info = {FALSE};

    cairo_set_line_width (cr, 0.06);
    cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
    cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);

    for (;;) {
	switch (*g++) {
	case 'M':
	    cairo_close_path (cr);
	    /* fall through */
	case 'm':
	    x1 = FX(*g++);
	    y1 = FY(*g++);
	    if (info.snap)
	    {
		x1 = SNAPX (x1);
		y1 = SNAPY (y1);
	    }
	    cairo_move_to (cr, x1, y1);
	    continue;
	case 'L':
	    cairo_close_path (cr);
	    /* fall through */
	case 'l':
	    x1 = FX(*g++);
	    y1 = FY(*g++);
	    if (info.snap)
	    {
		x1 = SNAPX (x1);
		y1 = SNAPY (y1);
	    }
	    cairo_line_to (cr, x1, y1);
	    continue;
	case 'C':
	    cairo_close_path (cr);
	    /* fall through */
	case 'c':
	    x1 = FX(*g++);
	    y1 = FY(*g++);
	    x2 = FX(*g++);
	    y2 = FY(*g++);
	    x3 = FX(*g++);
	    y3 = FY(*g++);
	    if (info.snap)
	    {
		x1 = SNAPX (x1);
		y1 = SNAPY (y1);
		x2 = SNAPX (x2);
		y2 = SNAPY (y2);
		x3 = SNAPX (x3);
		y3 = SNAPY (y3);
	    }
	    cairo_curve_to (cr, x1, y1, x2, y2, x3, y3);
	    continue;
	case 'E':
	    cairo_close_path (cr);
	    /* fall through */
	case 'e':
	    cairo_stroke (cr);
	    break;
	case 'X':
	    /* filler */
	    continue;
	}
	break;
    }

    metrics->x_advance = FX(twin_glyph_right(b)) + cairo_get_line_width (cr);
    metrics->x_advance +=  cairo_get_line_width (cr)/* XXX 2*x.margin */;
    if (info.snap)
	metrics->x_advance = SNAPI (SNAPX (metrics->x_advance));


    return CAIRO_STATUS_SUCCESS;
}