src/x11/pangox11.cpp

/**
 * This file gets included from dcclient.cpp and implements
 * the X11 interface to Pango.
 * Copyright (C) Owen Taylor and Robert Roebling.
 */

/* Declaration */

void
x11_draw_glyphs( Drawable       drawable,
		         GC             gc,
		         PangoFont     *font,
		         int            x,
		         int            y,
		         PangoGlyphString *glyphs);

void
x11_draw_layout_line_with_colors( Drawable         drawable,
                                  GC               gc,
                                  int              x,
                                  int              y,
                                  PangoLayoutLine  *line,
                                  XColor           *foreground,
                                  XColor           *background);

void
x11_draw_layout_with_colors( Drawable      drawable,
                             GC            gc,
                             int           x,
                             int           y,
                             PangoLayout  *layout,
                             XColor       *foreground,
                             XColor       *background);

void
x11_draw_layout( Drawable     drawable,
                 GC           gc,
                 int          x,
                 int          y,
                 PangoLayout *layout);

void
x11_pango_get_item_properties( PangoItem      *item,
                               PangoUnderline *uline,
                               gboolean       *strikethrough,
                               gint           *rise,
                               PangoColor     *fg_color,
                               gboolean       *fg_set,
                               PangoColor     *bg_color,
                               gboolean       *bg_set,
                               gboolean       *shape_set,
                               PangoRectangle *ink_rect,
                               PangoRectangle *logical_rect);

/* Implementation */

void
x11_draw_glyphs( Drawable       drawable,
		         GC             gc,
		         PangoFont     *font,
		         int            x,
		         int            y,
		         PangoGlyphString *glyphs)
{
    if (PANGO_XFT_IS_FONT (font))
    {
        pango_xft_picture_render( wxGlobalDisplay(), drawable, drawable, font, glyphs, x, y );
    }
    else
    {
        pango_x_render( wxGlobalDisplay(), drawable, gc, font, glyphs, x, y );
    }
}

void
x11_draw_layout_line_with_colors( Drawable         drawable,
                                  GC               gc,
                                  int              x,
                                  int              y,
                                  PangoLayoutLine  *line,
                                  XColor           *foreground,
                                  XColor           *background)
{
    PangoRectangle overall_rect;
    PangoRectangle logical_rect;
    PangoRectangle ink_rect;
    PangoContext *context;
    gint x_off = 0;
    gint rise = 0;

    context = pango_layout_get_context (line->layout);

    pango_layout_line_get_extents (line,NULL, &overall_rect);

    GSList *tmp_list = line->runs;
    while (tmp_list)
    {
        PangoUnderline uline = PANGO_UNDERLINE_NONE;
        PangoLayoutRun *run = (PangoLayoutRun *) tmp_list->data;
        PangoColor fg_color, bg_color;
        gboolean strike, fg_set, bg_set, shape_set;
        gint risen_y;

        tmp_list = tmp_list->next;

        x11_pango_get_item_properties (run->item, &uline,
            &strike, &rise,  &fg_color, &fg_set, &bg_color, &bg_set,
            &shape_set, &ink_rect, &logical_rect);

        /* we subtract the rise because X coordinates are upside down */
        risen_y = y - rise / PANGO_SCALE;

        if (!shape_set)
        {
            if (uline == PANGO_UNDERLINE_NONE)
                pango_glyph_string_extents (run->glyphs, run->item->analysis.font, NULL, &logical_rect);
            else
                pango_glyph_string_extents (run->glyphs, run->item->analysis.font, &ink_rect, &logical_rect);
        }

#if 0
	    XDrawRectangle( drawable, gc, TRUE,
			      x + (x_off + logical_rect.x) / PANGO_SCALE,
			      risen_y + overall_rect.y / PANGO_SCALE,
			      logical_rect.width / PANGO_SCALE,
			      overall_rect.height / PANGO_SCALE);
#endif

        if (!shape_set)
        {
            int gx = x + x_off / PANGO_SCALE;
            int gy = risen_y;

            x11_draw_glyphs( drawable, gc, run->item->analysis.font, gx, gy, run->glyphs);
        }

        if (uline ==  PANGO_UNDERLINE_SINGLE)
        {
            XDrawLine( wxGlobalDisplay(), drawable, gc,
			  x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
                          risen_y + 1,
			  x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
                         risen_y + 1);
        }

        x_off += logical_rect.width;
    }
}

void
x11_draw_layout_with_colors( Drawable      drawable,
                             GC            gc,
                             int           x,
                             int           y,
                             PangoLayout  *layout,
                             XColor       *foreground,
                             XColor       *background)
{
    PangoLayoutIter *iter = pango_layout_get_iter (layout);

    do
    {
        PangoLayoutLine *line = pango_layout_iter_get_line (iter);

        PangoRectangle logical_rect;
        pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);

        int baseline = pango_layout_iter_get_baseline (iter);

        x11_draw_layout_line_with_colors( drawable, gc,
                                          x + logical_rect.x / PANGO_SCALE,
                                          y + baseline / PANGO_SCALE,
                                          line,
                                          foreground,
                                          background);

    } while (pango_layout_iter_next_line (iter));

    pango_layout_iter_free (iter);
}

void
x11_draw_layout( Drawable     drawable,
                 GC           gc,
                 int          x,
                 int          y,
                 PangoLayout *layout)
{
    wxCHECK_RET( layout, wxT("No layout") );

    x11_draw_layout_with_colors (drawable, gc, x, y, layout, NULL, NULL);
}

void
x11_pango_get_item_properties( PangoItem      *item,
                               PangoUnderline *uline,
                               gboolean       *strikethrough,
                               gint           *rise,
                               PangoColor     *fg_color,
                               gboolean       *fg_set,
                               PangoColor     *bg_color,
                               gboolean       *bg_set,
                               gboolean       *shape_set,
                               PangoRectangle *ink_rect,
                               PangoRectangle *logical_rect)
{
  GSList *tmp_list = item->analysis.extra_attrs;

  if (strikethrough)
      *strikethrough = FALSE;

  if (fg_set)
    *fg_set = FALSE;

  if (bg_set)
    *bg_set = FALSE;

  if (shape_set)
    *shape_set = FALSE;

  if (rise)
    *rise = 0;

  while (tmp_list)
    {
      PangoAttribute *attr = (PangoAttribute *) tmp_list->data;

      switch (attr->klass->type)
	{
	case PANGO_ATTR_UNDERLINE:
	  if (uline)
	    *uline = (PangoUnderline) ((PangoAttrInt *)attr)->value;
	  break;

	case PANGO_ATTR_STRIKETHROUGH:
	    if (strikethrough)
		*strikethrough = ((PangoAttrInt *)attr)->value;
	    break;

	case PANGO_ATTR_FOREGROUND:
	  if (fg_color)
	    *fg_color = ((PangoAttrColor *)attr)->color;
	  if (fg_set)
	    *fg_set = TRUE;

	  break;

	case PANGO_ATTR_BACKGROUND:
	  if (bg_color)
	    *bg_color = ((PangoAttrColor *)attr)->color;
	  if (bg_set)
	    *bg_set = TRUE;

	  break;

	case PANGO_ATTR_SHAPE:
	  if (shape_set)
	    *shape_set = TRUE;
	  if (logical_rect)
	    *logical_rect = ((PangoAttrShape *)attr)->logical_rect;
	  if (ink_rect)
	    *ink_rect = ((PangoAttrShape *)attr)->ink_rect;
	  break;

        case PANGO_ATTR_RISE:
          if (rise)
            *rise = ((PangoAttrInt *)attr)->value;
          break;

	default:
	  break;
	}
      tmp_list = tmp_list->next;
    }
}
Commit	Line	Data
	1	/**
	2	* This file gets included from dcclient.cpp and implements
	3	* the X11 interface to Pango.
	4	* Copyright (C) Owen Taylor and Robert Roebling.
	5	*/
	6
	7	/* Declaration */
	8
	9	void
	10	x11_draw_glyphs( Drawable drawable,
	11	GC gc,
	12	PangoFont *font,
	13	int x,
	14	int y,
	15	PangoGlyphString *glyphs);
	16
	17	void
	18	x11_draw_layout_line_with_colors( Drawable drawable,
	19	GC gc,
	20	int x,
	21	int y,
	22	PangoLayoutLine *line,
	23	XColor *foreground,
	24	XColor *background);
	25
	26	void
	27	x11_draw_layout_with_colors( Drawable drawable,
	28	GC gc,
	29	int x,
	30	int y,
	31	PangoLayout *layout,
	32	XColor *foreground,
	33	XColor *background);
	34
	35	void
	36	x11_draw_layout( Drawable drawable,
	37	GC gc,
	38	int x,
	39	int y,
	40	PangoLayout *layout);
	41
	42	void
	43	x11_pango_get_item_properties( PangoItem *item,
	44	PangoUnderline *uline,
	45	gboolean *strikethrough,
	46	gint *rise,
	47	PangoColor *fg_color,
	48	gboolean *fg_set,
	49	PangoColor *bg_color,
	50	gboolean *bg_set,
	51	gboolean *shape_set,
	52	PangoRectangle *ink_rect,
	53	PangoRectangle *logical_rect);
	54
	55	/* Implementation */
	56
	57	void
	58	x11_draw_glyphs( Drawable drawable,
	59	GC gc,
	60	PangoFont *font,
	61	int x,
	62	int y,
	63	PangoGlyphString *glyphs)
	64	{
	65	if (PANGO_XFT_IS_FONT (font))
	66	{
	67	pango_xft_picture_render( wxGlobalDisplay(), drawable, drawable, font, glyphs, x, y );
	68	}
	69	else
	70	{
	71	pango_x_render( wxGlobalDisplay(), drawable, gc, font, glyphs, x, y );
	72	}
	73	}
	74
	75	void
	76	x11_draw_layout_line_with_colors( Drawable drawable,
	77	GC gc,
	78	int x,
	79	int y,
	80	PangoLayoutLine *line,
	81	XColor *foreground,
	82	XColor *background)
	83	{
	84	PangoRectangle overall_rect;
	85	PangoRectangle logical_rect;
	86	PangoRectangle ink_rect;
	87	PangoContext *context;
	88	gint x_off = 0;
	89	gint rise = 0;
	90
	91	context = pango_layout_get_context (line->layout);
	92
	93	pango_layout_line_get_extents (line,NULL, &overall_rect);
	94
	95	GSList *tmp_list = line->runs;
	96	while (tmp_list)
	97	{
	98	PangoUnderline uline = PANGO_UNDERLINE_NONE;
	99	PangoLayoutRun run = (PangoLayoutRun ) tmp_list->data;
	100	PangoColor fg_color, bg_color;
	101	gboolean strike, fg_set, bg_set, shape_set;
	102	gint risen_y;
	103
	104	tmp_list = tmp_list->next;
	105
	106	x11_pango_get_item_properties (run->item, &uline,
	107	&strike, &rise, &fg_color, &fg_set, &bg_color, &bg_set,
	108	&shape_set, &ink_rect, &logical_rect);
	109
	110	/* we subtract the rise because X coordinates are upside down */
	111	risen_y = y - rise / PANGO_SCALE;
	112
	113	if (!shape_set)
	114	{
	115	if (uline == PANGO_UNDERLINE_NONE)
	116	pango_glyph_string_extents (run->glyphs, run->item->analysis.font, NULL, &logical_rect);
	117	else
	118	pango_glyph_string_extents (run->glyphs, run->item->analysis.font, &ink_rect, &logical_rect);
	119	}
	120
	121	#if 0
	122	XDrawRectangle( drawable, gc, TRUE,
	123	x + (x_off + logical_rect.x) / PANGO_SCALE,
	124	risen_y + overall_rect.y / PANGO_SCALE,
	125	logical_rect.width / PANGO_SCALE,
	126	overall_rect.height / PANGO_SCALE);
	127	#endif
	128
	129	if (!shape_set)
	130	{
	131	int gx = x + x_off / PANGO_SCALE;
	132	int gy = risen_y;
	133
	134	x11_draw_glyphs( drawable, gc, run->item->analysis.font, gx, gy, run->glyphs);
	135	}
	136
	137	if (uline == PANGO_UNDERLINE_SINGLE)
	138	{
	139	XDrawLine( wxGlobalDisplay(), drawable, gc,
	140	x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
	141	risen_y + 1,
	142	x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
	143	risen_y + 1);
	144	}
	145
	146	x_off += logical_rect.width;
	147	}
	148	}
	149
	150	void
	151	x11_draw_layout_with_colors( Drawable drawable,
	152	GC gc,
	153	int x,
	154	int y,
	155	PangoLayout *layout,
	156	XColor *foreground,
	157	XColor *background)
	158	{
	159	PangoLayoutIter *iter = pango_layout_get_iter (layout);
	160
	161	do
	162	{
	163	PangoLayoutLine *line = pango_layout_iter_get_line (iter);
	164
	165	PangoRectangle logical_rect;
	166	pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
	167
	168	int baseline = pango_layout_iter_get_baseline (iter);
	169
	170	x11_draw_layout_line_with_colors( drawable, gc,
	171	x + logical_rect.x / PANGO_SCALE,
	172	y + baseline / PANGO_SCALE,
	173	line,
	174	foreground,
	175	background);
	176
	177	} while (pango_layout_iter_next_line (iter));
	178
	179	pango_layout_iter_free (iter);
	180	}
	181
	182	void
	183	x11_draw_layout( Drawable drawable,
	184	GC gc,
	185	int x,
	186	int y,
	187	PangoLayout *layout)
	188	{
	189	wxCHECK_RET( layout, wxT("No layout") );
	190
	191	x11_draw_layout_with_colors (drawable, gc, x, y, layout, NULL, NULL);
	192	}
	193
	194	void
	195	x11_pango_get_item_properties( PangoItem *item,
	196	PangoUnderline *uline,
	197	gboolean *strikethrough,
	198	gint *rise,
	199	PangoColor *fg_color,
	200	gboolean *fg_set,
	201	PangoColor *bg_color,
	202	gboolean *bg_set,
	203	gboolean *shape_set,
	204	PangoRectangle *ink_rect,
	205	PangoRectangle *logical_rect)
	206	{
	207	GSList *tmp_list = item->analysis.extra_attrs;
	208
	209	if (strikethrough)
	210	*strikethrough = FALSE;
	211
	212	if (fg_set)
	213	*fg_set = FALSE;
	214
	215	if (bg_set)
	216	*bg_set = FALSE;
	217
	218	if (shape_set)
	219	*shape_set = FALSE;
	220
	221	if (rise)
	222	*rise = 0;
	223
	224	while (tmp_list)
	225	{
	226	PangoAttribute attr = (PangoAttribute ) tmp_list->data;
	227
	228	switch (attr->klass->type)
	229	{
	230	case PANGO_ATTR_UNDERLINE:
	231	if (uline)
	232	uline = (PangoUnderline) ((PangoAttrInt )attr)->value;
	233	break;
	234
	235	case PANGO_ATTR_STRIKETHROUGH:
	236	if (strikethrough)
	237	strikethrough = ((PangoAttrInt )attr)->value;
	238	break;
	239
	240	case PANGO_ATTR_FOREGROUND:
	241	if (fg_color)
	242	fg_color = ((PangoAttrColor )attr)->color;
	243	if (fg_set)
	244	*fg_set = TRUE;
	245
	246	break;
	247
	248	case PANGO_ATTR_BACKGROUND:
	249	if (bg_color)
	250	bg_color = ((PangoAttrColor )attr)->color;
	251	if (bg_set)
	252	*bg_set = TRUE;
	253
	254	break;
	255
	256	case PANGO_ATTR_SHAPE:
	257	if (shape_set)
	258	*shape_set = TRUE;
	259	if (logical_rect)
	260	logical_rect = ((PangoAttrShape )attr)->logical_rect;
	261	if (ink_rect)
	262	ink_rect = ((PangoAttrShape )attr)->ink_rect;
	263	break;
	264
	265	case PANGO_ATTR_RISE:
	266	if (rise)
	267	rise = ((PangoAttrInt )attr)->value;
	268	break;
	269
	270	default:
	271	break;
	272	}
	273	tmp_list = tmp_list->next;
	274	}
	275	}
	276