src/x11/pango_x.cpp

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

/* Declaration */

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

void
x11_draw_layout_line_with_colors( Drawable         drawable,
                                  GC               gc,
                                  int              x,
                                  int              y,
                                  PangoLayoutLine  *line,
                                  wxColour       &colour );

void
x11_draw_layout_with_colors( Drawable      drawable,
                             GC            gc,
                             int           x,
                             int           y,
                             PangoLayout  *layout,
                             wxColour     &colour );

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

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,
                 wxColour           &colour )
{
    if (PANGO_XFT_IS_FONT (font))
    {
        Display* xdisplay = wxGlobalDisplay();
        int xscreen = DefaultScreen( xdisplay );
        Visual* xvisual = DefaultVisual( xdisplay, xscreen );

        Colormap xcolormap = DefaultColormapOfScreen( XScreenOfDisplay( xdisplay, xscreen ) );

        XftDraw *draw = XftDrawCreate( xdisplay, drawable, xvisual, xcolormap );
        XftColor color;
        color.pixel = 0;
        color.color.red = colour.Red() << 8;
        color.color.green = colour.Green() << 8;
        color.color.blue = colour.Blue() << 8;
        color.color.alpha = 65000;
        pango_xft_render( draw, &color, font, glyphs, x, y );

        XftDrawDestroy( draw );
    }
    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,
                                  wxColour        &colour )
{
    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, colour );
        }

        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,
                             wxColour       &colour )
{
    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,
                                          colour );

    } 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,
                 wxColour    &colour)
{
    wxCHECK_RET( layout, wxT("No layout") );

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

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	* Licence: The wxWindows licence
	6	*/
	7
	8	/* Declaration */
	9
	10	void
	11	x11_draw_glyphs( Drawable drawable,
	12	GC gc,
	13	PangoFont *font,
	14	int x,
	15	int y,
	16	PangoGlyphString *glyphs,
	17	wxColour &colour );
	18
	19	void
	20	x11_draw_layout_line_with_colors( Drawable drawable,
	21	GC gc,
	22	int x,
	23	int y,
	24	PangoLayoutLine *line,
	25	wxColour &colour );
	26
	27	void
	28	x11_draw_layout_with_colors( Drawable drawable,
	29	GC gc,
	30	int x,
	31	int y,
	32	PangoLayout *layout,
	33	wxColour &colour );
	34
	35	void
	36	x11_draw_layout( Drawable drawable,
	37	GC gc,
	38	int x,
	39	int y,
	40	PangoLayout *layout,
	41	wxColour &colour);
	42
	43	void
	44	x11_pango_get_item_properties( PangoItem *item,
	45	PangoUnderline *uline,
	46	gboolean *strikethrough,
	47	gint *rise,
	48	PangoColor *fg_color,
	49	gboolean *fg_set,
	50	PangoColor *bg_color,
	51	gboolean *bg_set,
	52	gboolean *shape_set,
	53	PangoRectangle *ink_rect,
	54	PangoRectangle *logical_rect);
	55
	56	/* Implementation */
	57
	58	void
	59	x11_draw_glyphs( Drawable drawable,
	60	GC gc,
	61	PangoFont *font,
	62	int x,
	63	int y,
	64	PangoGlyphString *glyphs,
	65	wxColour &colour )
	66	{
	67	if (PANGO_XFT_IS_FONT (font))
	68	{
	69	Display* xdisplay = wxGlobalDisplay();
	70	int xscreen = DefaultScreen( xdisplay );
	71	Visual* xvisual = DefaultVisual( xdisplay, xscreen );
	72
	73	Colormap xcolormap = DefaultColormapOfScreen( XScreenOfDisplay( xdisplay, xscreen ) );
	74
	75	XftDraw *draw = XftDrawCreate( xdisplay, drawable, xvisual, xcolormap );
	76	XftColor color;
	77	color.pixel = 0;
	78	color.color.red = colour.Red() << 8;
	79	color.color.green = colour.Green() << 8;
	80	color.color.blue = colour.Blue() << 8;
	81	color.color.alpha = 65000;
	82	pango_xft_render( draw, &color, font, glyphs, x, y );
	83
	84	XftDrawDestroy( draw );
	85	}
	86	else
	87	{
	88	pango_x_render( wxGlobalDisplay(), drawable, gc, font, glyphs, x, y );
	89	}
	90	}
	91
	92	void
	93	x11_draw_layout_line_with_colors( Drawable drawable,
	94	GC gc,
	95	int x,
	96	int y,
	97	PangoLayoutLine *line,
	98	wxColour &colour )
	99	{
	100	PangoRectangle overall_rect;
	101	PangoRectangle logical_rect;
	102	PangoRectangle ink_rect;
	103	PangoContext *context;
	104	gint x_off = 0;
	105	gint rise = 0;
	106
	107	context = pango_layout_get_context (line->layout);
	108
	109	pango_layout_line_get_extents (line,NULL, &overall_rect);
	110
	111	GSList *tmp_list = line->runs;
	112	while (tmp_list)
	113	{
	114	PangoUnderline uline = PANGO_UNDERLINE_NONE;
	115	PangoLayoutRun run = (PangoLayoutRun ) tmp_list->data;
	116	PangoColor fg_color, bg_color;
	117	gboolean strike, fg_set, bg_set, shape_set;
	118	gint risen_y;
	119
	120	tmp_list = tmp_list->next;
	121
	122	x11_pango_get_item_properties (run->item, &uline,
	123	&strike, &rise, &fg_color, &fg_set, &bg_color, &bg_set,
	124	&shape_set, &ink_rect, &logical_rect);
	125
	126	/* we subtract the rise because X coordinates are upside down */
	127	risen_y = y - rise / PANGO_SCALE;
	128
	129	if (!shape_set)
	130	{
	131	if (uline == PANGO_UNDERLINE_NONE)
	132	pango_glyph_string_extents (run->glyphs, run->item->analysis.font, NULL, &logical_rect);
	133	else
	134	pango_glyph_string_extents (run->glyphs, run->item->analysis.font, &ink_rect, &logical_rect);
	135	}
	136
	137	#if 0
	138	XDrawRectangle( drawable, gc, TRUE,
	139	x + (x_off + logical_rect.x) / PANGO_SCALE,
	140	risen_y + overall_rect.y / PANGO_SCALE,
	141	logical_rect.width / PANGO_SCALE,
	142	overall_rect.height / PANGO_SCALE);
	143	#endif
	144
	145	if (!shape_set)
	146	{
	147	int gx = x + x_off / PANGO_SCALE;
	148	int gy = risen_y;
	149
	150	x11_draw_glyphs( drawable, gc, run->item->analysis.font, gx, gy, run->glyphs, colour );
	151	}
	152
	153	if (uline == PANGO_UNDERLINE_SINGLE)
	154	{
	155	XDrawLine( wxGlobalDisplay(), drawable, gc,
	156	x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
	157	risen_y + 1,
	158	x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
	159	risen_y + 1);
	160	}
	161
	162	x_off += logical_rect.width;
	163	}
	164	}
	165
	166	void
	167	x11_draw_layout_with_colors( Drawable drawable,
	168	GC gc,
	169	int x,
	170	int y,
	171	PangoLayout *layout,
	172	wxColour &colour )
	173	{
	174	PangoLayoutIter *iter = pango_layout_get_iter (layout);
	175
	176	do
	177	{
	178	PangoLayoutLine *line = pango_layout_iter_get_line (iter);
	179
	180	PangoRectangle logical_rect;
	181	pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
	182
	183	int baseline = pango_layout_iter_get_baseline (iter);
	184
	185	x11_draw_layout_line_with_colors( drawable, gc,
	186	x + logical_rect.x / PANGO_SCALE,
	187	y + baseline / PANGO_SCALE,
	188	line,
	189	colour );
	190
	191	} while (pango_layout_iter_next_line (iter));
	192
	193	pango_layout_iter_free (iter);
	194	}
	195
	196	void
	197	x11_draw_layout( Drawable drawable,
	198	GC gc,
	199	int x,
	200	int y,
	201	PangoLayout *layout,
	202	wxColour &colour)
	203	{
	204	wxCHECK_RET( layout, wxT("No layout") );
	205
	206	x11_draw_layout_with_colors (drawable, gc, x, y, layout, colour );
	207	}
	208
	209	void
	210	x11_pango_get_item_properties( PangoItem *item,
	211	PangoUnderline *uline,
	212	gboolean *strikethrough,
	213	gint *rise,
	214	PangoColor *fg_color,
	215	gboolean *fg_set,
	216	PangoColor *bg_color,
	217	gboolean *bg_set,
	218	gboolean *shape_set,
	219	PangoRectangle *ink_rect,
	220	PangoRectangle *logical_rect)
	221	{
	222	GSList *tmp_list = item->analysis.extra_attrs;
	223
	224	if (strikethrough)
	225	*strikethrough = FALSE;
	226
	227	if (fg_set)
	228	*fg_set = FALSE;
	229
	230	if (bg_set)
	231	*bg_set = FALSE;
	232
	233	if (shape_set)
	234	*shape_set = FALSE;
	235
	236	if (rise)
	237	*rise = 0;
	238
	239	while (tmp_list)
	240	{
	241	PangoAttribute attr = (PangoAttribute ) tmp_list->data;
	242
	243	switch (attr->klass->type)
	244	{
	245	case PANGO_ATTR_UNDERLINE:
	246	if (uline)
	247	uline = (PangoUnderline) ((PangoAttrInt )attr)->value;
	248	break;
	249
	250	case PANGO_ATTR_STRIKETHROUGH:
	251	if (strikethrough)
	252	strikethrough = ((PangoAttrInt )attr)->value;
	253	break;
	254
	255	case PANGO_ATTR_FOREGROUND:
	256	if (fg_color)
	257	fg_color = ((PangoAttrColor )attr)->color;
	258	if (fg_set)
	259	*fg_set = TRUE;
	260
	261	break;
	262
	263	case PANGO_ATTR_BACKGROUND:
	264	if (bg_color)
	265	bg_color = ((PangoAttrColor )attr)->color;
	266	if (bg_set)
	267	*bg_set = TRUE;
	268
	269	break;
	270
	271	case PANGO_ATTR_SHAPE:
	272	if (shape_set)
	273	*shape_set = TRUE;
	274	if (logical_rect)
	275	logical_rect = ((PangoAttrShape )attr)->logical_rect;
	276	if (ink_rect)
	277	ink_rect = ((PangoAttrShape )attr)->ink_rect;
	278	break;
	279
	280	case PANGO_ATTR_RISE:
	281	if (rise)
	282	rise = ((PangoAttrInt )attr)->value;
	283	break;
	284
	285	default:
	286	break;
	287	}
	288	tmp_list = tmp_list->next;
	289	}
	290	}
	291