C++ cairo_set_font_face函数代码示例

int render_keyvalue(cairo_t *cairo, int x, int y, char *k, char *v , int d) {
	uint32_t render_x;
	cairo_text_extents_t k_extents;
	cairo_text_extents_t v_extents;

	//we must set the fonts to measure extents
	cairo_set_font_face(cairo, conf->keyfont);
	cairo_set_font_size(cairo, conf->keyfontsize);
	cairo_text_extents(cairo, k, &k_extents);
	cairo_set_font_face(cairo, conf->valfont);
	cairo_set_font_size(cairo, conf->valfontsize);
	cairo_text_extents(cairo, v, &v_extents);

	//render key
	set_cairo_source_colour(cairo, conf->keycol);
	cairo_set_font_face(cairo, conf->keyfont);
	cairo_set_font_size(cairo, conf->keyfontsize);
	render_x = x;
	if(d == RIGHT)
		render_x = x - (k_extents.width + v_extents.width + conf->kvpadding);
	cairo_move_to(cairo, render_x, y);
	cairo_show_text(cairo, k);

	//render value
	set_cairo_source_colour(cairo, conf->valcol);
	cairo_set_font_face(cairo, conf->valfont);
	cairo_set_font_size(cairo, conf->valfontsize);
	render_x = x + k_extents.width + conf->kvpadding;
	if(d == RIGHT)
		render_x = x - v_extents.width;
	cairo_move_to(cairo, render_x, y);
	cairo_show_text(cairo, v);

	return k_extents.width + conf->kvpadding + v_extents.width;
}

void CairoRenderer::SetFontFace(InputStream *pStream)
{
	FT_Face face;
	static cairo_user_data_key_t key;

	if (m_cairo_face)
	{
		cairo_set_font_face(m_pCairo, NULL);
		cairo_font_face_destroy(m_cairo_face);
		m_cairo_face = NULL;
	}

	if (pStream)
	{
		face = FreeType::OpenFace(pStream);  // face will be destroyed by FT_Done_Face
		if (face)
		{
			m_cairo_face = cairo_ft_font_face_create_for_ft_face(face, 0);
			cairo_font_face_set_user_data(m_cairo_face, &key, face, (cairo_destroy_func_t)FT_Done_Face);
		}
	}
	else
		m_cairo_face = cairo_toy_font_face_create("unifont", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);

	if (m_cairo_face)
		cairo_set_font_face(m_pCairo, m_cairo_face);
}

static PyObject *
pycairo_set_font_face (PycairoContext *o, PyObject *obj) {
  if (PyObject_TypeCheck(obj, &PycairoFontFace_Type))
    cairo_set_font_face (o->ctx, ((PycairoFontFace *)obj)->font_face);
  else if (obj == Py_None)
    cairo_set_font_face (o->ctx, NULL);
  else {
    PyErr_SetString(PyExc_TypeError,
		    "Context.set_font_face() argument must be "
		    "cairo.FontFace or None");
    return NULL;
  }
  RETURN_NULL_IF_CAIRO_CONTEXT_ERROR(o->ctx);
  Py_RETURN_NONE;
}

int render_workspace(cairo_t *cairo, int x, int y,
					 struct i3_workspace *ws, int d) {

	//set colour based on visibility
	struct colour *c = conf->inviswscol;
	if(strcmp(ws->visible, "true") == 0) c = conf->viswscol;
	set_cairo_source_colour(cairo, c);

	//set font
	cairo_set_font_face(cairo, conf->wsfont);
	cairo_set_font_size(cairo, conf->wsfontsize);

	cairo_text_extents_t extents;
	cairo_text_extents(cairo, ws->name, &extents);

	int render_x = x;
	if(d == RIGHT) render_x = x - extents.width;

	//draw the text
	cairo_move_to(cairo, render_x, y);
	cairo_show_text(cairo, ws->name);

	//update the padding
	return extents.width + 2;
}

static VALUE
cr_set_font_face (VALUE self, VALUE face)
{
  cairo_set_font_face (_SELF, NIL_P (face) ? NULL : RVAL2CRFONTFACE (face));
  cr_check_status (_SELF);
  return self;
}

void label_t::paint() {

	clearSurface();

	auto cr = graphics.getContext();
	auto bounds = getBounds();

	cairo_set_source_rgb(cr, 0, 0, 0);

	int textLeft;
	int textBot = (bounds.height / 2 - lastExtents.height / 2) + lastExtents.height;

	if (alignment == g_text_alignment::CENTER) {
		textLeft = bounds.width / 2 - lastExtents.width / 2;
	} else if (alignment == g_text_alignment::RIGHT) {
		textLeft = bounds.width - lastExtents.width;
	} else {
		textLeft = 0;
	}

	cairo_move_to(cr, textLeft, textBot);
	cairo_set_font_face(cr, font->getFace());
	cairo_set_font_size(cr, fontSize);
	cairo_show_text(cr, text.c_str());
}

static void
draw (GtkWidget *drawing_area,
      cairo_t *cr,
      FT_Face face)
{
    cairo_font_extents_t font_extents;
    gint *sizes = NULL, n_sizes, alpha_size, pos_y, i;
    const gchar *text;
    cairo_font_face_t *font;

    text = get_sample_string (face);
    sizes = build_sizes_table (face, &n_sizes, &alpha_size);

    font = cairo_ft_font_face_create_for_ft_face (face, 0);
    cairo_set_font_face (cr, font);
    cairo_font_extents (cr, &font_extents);
    cairo_font_face_destroy (font);

    /* draw text */
    pos_y = MAX (font_extents.height, 32) + 4;
    cairo_set_font_size (cr, alpha_size);
    draw_string (cr, lowercase_text, &pos_y);
    draw_string (cr, uppercase_text, &pos_y);
    draw_string (cr, punctuation_text, &pos_y);

    pos_y += 8;
    for (i = 0; i < n_sizes; i++) {
	cairo_set_font_size (cr, sizes[i]);
	draw_string (cr, text, &pos_y);
    }

    g_free (sizes);
}

int toolwin_win_create(ToolWin *tw) {
	tw->win = XCreateSimpleWindow(dpy, root, 20, 20, tw->w, tw->h, 0, 0, 0);
	tw->buf = XCreatePixmap(dpy, root, tw->w, tw->h, DefaultDepth(dpy,scr));
	cairo_surface_t *t = cairo_xlib_surface_create(dpy, tw->buf,
			DefaultVisual(dpy,scr), tw->w, tw->h);
	tw->ctx = cairo_create(t);
	cairo_surface_destroy(t);
	cairo_set_font_face(tw->ctx,conf.font);
	cairo_set_font_size(tw->ctx,conf.font_size);
	XSelectInput(dpy, tw->win, EVENT_MASK);
	XSetTransientForHint(dpy, tw->win, win);
	XSetWMProtocols(dpy, tw->win, &WM_DELETE_WINDOW, 1);
	XSizeHints *hints = XAllocSizeHints();
	hints->min_width = hints->max_width = tw->w;
	hints->min_height = hints->max_height = tw->h;
	hints->flags = PMinSize | PMaxSize;
	XSetWMNormalHints(dpy, tw->win, hints);
	XFree(hints);
	XStoreName(dpy, tw->win, tw->name);
	if (tw->backing) tw->backing(tw);
	else toolwin_backing(tw);
	XSetWindowBackgroundPixmap(dpy, tw->win, tw->buf);
	XFlush(dpy);
	return 0;
}

void ilG_gui_textlayout_getExtents(ilG_gui_textlayout *self, unsigned *rx, unsigned *ry, int *bx, int *by, int *ax, int *ay)
{
    if (!self->have_size) {
        self->have_size = 1;
        cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 0, 0);
        cairo_t *cr = cairo_create(surface);

        il_return_on_fail(self->cairo_glyphs);
        cairo_set_font_face(cr, self->cairo_ft_face);
        cairo_set_font_size(cr, self->pt);
        cairo_glyph_extents(cr, self->cairo_glyphs, self->glyph_count, &self->extents);
        cairo_surface_destroy(surface);
        cairo_destroy(cr);
    }
    if (rx) {
        *rx = self->extents.width;
    }
    if (ry) {
        *ry = self->extents.height + 1; // TODO: ????
    }
    if (bx) {
        *bx = self->extents.x_bearing;
    }
    if (by) {
        *by = self->extents.y_bearing;
    }
    if (ax) {
        *ax = self->extents.x_advance;
    }
    if (ay) {
        *ay = self->extents.y_advance;
    }
}

static int info_draw(ToolWin *tw) {
	toolwin_backing(tw);
	/* info */
	cairo_set_source_rgba(tw->ctx,0,0,0,1.0);
	cairo_set_font_face(tw->ctx, conf.bfont);
	cairo_move_to(tw->ctx, 0, 8);
	info_printf(tw, A_CENTER, "%.3lf sec, %.2lf KHz",
			spect->fft->time[mx],spect->fft->freq[my]);
	cairo_rel_move_to(tw->ctx,0,12);
	info_split_printf(tw, "Threshold:", "%.2lf", -1.0 * conf.thresh);
	info_split_printf(tw, "Spectrogram Floor:", "%.2lf",
			-1.0 * conf.spect_floor);
	info_split_printf(tw, "Path Length:","%.2lf", spect->pex);
	info_split_printf(tw, "Path Duration:","%.3lf", spect->tex);
	info_split_printf(tw, "Frequency Excursion:","%.3lf", spect->fex);
	cairo_move_to(tw->ctx, 0, 145);
	/* modes */
	info_split_printf(tw, "Modes:","");
	cairo_set_font_face(tw->ctx, conf.bfont);
		/* erase */
	set_color(tw->ctx,RGBA_ERASE1)
	if (mode & MODE_ERASE) set_color(tw->ctx,RGBA_ERASE1)
	else cairo_set_source_rgba(tw->ctx,0.8,0.8,0.8,1.0);
	cairo_rectangle(tw->ctx, 10, 170, tw->w / 2.0 - 15, 20);
	cairo_fill_preserve(tw->ctx);
	cairo_set_source_rgba(tw->ctx,0,0,0,1.0);
	cairo_stroke(tw->ctx);
	cairo_text_extents(tw->ctx,"Erase",&ext);
	cairo_move_to(tw->ctx, tw->w / 4.0 - ext.width / 2.0, 185);
	cairo_set_source_rgba(tw->ctx,0,0,0,1.0);
	cairo_show_text(tw->ctx,"Erase");
		/* crop */
	if (mode & MODE_CROP) set_color(tw->ctx, RGBA_CROP)
	else cairo_set_source_rgba(tw->ctx,0.8,0.8,0.8,1.0);
	cairo_rectangle(tw->ctx, 5 + tw->w / 2.0, 170, tw->w / 2.0 - 15, 20);
	cairo_fill_preserve(tw->ctx);
	cairo_set_source_rgba(tw->ctx,0.0,0.0,0.0,1.0);
	cairo_stroke(tw->ctx);
	cairo_text_extents(tw->ctx,"Crop",&ext);
	cairo_move_to(tw->ctx, tw->w * 0.75 - ext.width / 2.0, 185);
	cairo_set_source_rgba(tw->ctx,0,0,0,1.0);
	cairo_show_text(tw->ctx,"Crop");
	/* draw */
	toolwin_draw(tw);
	return 0;
}

int renderTruetypeSymbolCairo(imageObj *img, double x, double y, symbolObj *symbol,
                              symbolStyleObj *s)
{
  int unicode;
  cairo_glyph_t glyph;
  cairo_text_extents_t extents;

  cairo_matrix_t trans;
  double ox,oy;
  cairoCacheData *cache = MS_IMAGE_RENDERER_CACHE(img);
  cairo_renderer *r = CAIRO_RENDERER(img);
  faceCacheObj *face = getFontFace(cache,symbol->full_font_path);

  if(!face) return MS_FAILURE;

  cairo_save(r->cr);
  cairo_set_font_face(r->cr,face->face);
  cairo_set_font_size(r->cr,s->scale*96/72.0);


  msUTF8ToUniChar(symbol->character, &unicode);

  if (face->ftface->charmap &&
    face->ftface->charmap->encoding == FT_ENCODING_MS_SYMBOL)
    unicode |= 0xf000;

  glyph.index = FT_Get_Char_Index(face->ftface, unicode);
  glyph.x=0;
  glyph.y=0;
  cairo_glyph_extents(r->cr,&glyph,1,&extents);
  ox=extents.x_bearing+extents.width/2.;
  oy=extents.y_bearing+extents.height/2.;



  cairo_matrix_init_rotate(&trans,-s->rotation);

  cairo_matrix_transform_point(&trans,&ox,&oy);
  /* cairo_translate(cr,-extents.width/2,-extents.height/2); */

  cairo_translate(r->cr,x-ox,y-oy);
  cairo_rotate(r->cr, -s->rotation);

  cairo_glyph_path(r->cr,&glyph,1);

  if (s->outlinewidth) {
    msCairoSetSourceColor(r->cr, s->outlinecolor);
    cairo_set_line_width(r->cr, s->outlinewidth + 1);
    cairo_stroke_preserve(r->cr);
  }
  if(s->color) {
    msCairoSetSourceColor(r->cr, s->color);
    cairo_fill_preserve(r->cr);
  }
  cairo_new_path(r->cr);
  cairo_restore(r->cr);
  return MS_SUCCESS;
}

static int cairo_set_font_face_l( lua_State* L )
{
  lua_cairo_t* lc = lua_cairo_check( L, 1 );
  lua_cairo_font_face_t* lcff = lua_cairo_font_face_check( L, 2 );

  cairo_set_font_face( lc->cairo, lcff->crface );

  return( 0 );
}

static int info_split_printf(ToolWin *tw, char *bold, char *fmt, ...) {
	char str[MAX_STRING];
	va_list arg;
	va_start(arg, fmt);
	vsprintf(str, fmt, arg);
	va_end(arg);
	cairo_set_font_face(tw->ctx, conf.bfont);
	cairo_text_extents(tw->ctx,bold,&ext);
	cairo_rel_move_to(tw->ctx, MARGIN, conf.font_size);
	cairo_show_text(tw->ctx,bold);
	cairo_rel_move_to(tw->ctx, -1.0 * ext.x_advance - MARGIN, 0);
	cairo_set_font_face(tw->ctx, conf.font);
	cairo_text_extents(tw->ctx,str,&ext);
	cairo_rel_move_to(tw->ctx, tw->w - ext.x_advance - MARGIN, 0);
	cairo_show_text(tw->ctx,str);
	cairo_rel_move_to(tw->ctx, MARGIN - tw->w, conf.font_size / 3.0);
	return 0;
}

static int
cr_set_font_face (lua_State *L) {
    cairo_t **obj = luaL_checkudata(L, 1, OOCAIRO_MT_NAME_CONTEXT);
    cairo_font_face_t *face = 0;
    if (!lua_isnoneornil(L, 2))
        face = *(cairo_font_face_t **) luaL_checkudata(L, 2, OOCAIRO_MT_NAME_FONTFACE);
    cairo_set_font_face(*obj, face);
    return 0;
}

void Aw::Label::getMetrics(cairo_t *cr, Size& min_size, bool& expandh, bool& expandv)
{
    // We over-ride the
    switch (m_font_type)
    {
        case font_type::normal:
            cairo_set_font_face(cr, theApp->m_font.m_norm_face);
            break;
        case font_type::bold:
            cairo_set_font_face(cr, theApp->m_font.m_bold_face);
            break;
        case font_type::mono:
            cairo_set_font_face(cr, theApp->m_font.m_mono_face);
            break;
    }

    cairo_text_extents_t te;
    cairo_set_source_rgb (cr, 0, 0, 0);
    cairo_set_font_size(cr, m_font_size);
    cairo_text_extents (cr, m_text.c_str(), &te);

//    anvil_syslog(0, "TEXT: %s %d %d %d %d %d %d\n",
//            m_text.c_str(),
//            (int)te.width,
//            (int)te.height,
//            (int)te.x_advance,
//            (int)te.y_advance,
//            (int)te.x_bearing,
//            (int)te.y_bearing
//            );

    min_size = getMinSize();
    if (te.width + 10 > min_size.m_width)
    {
        min_size.m_width = te.width + 10;
    }
    if (te.height + 10 > min_size.m_height)
    {
        min_size.m_height = te.height + 10;
    }

    expandh = expandH();
    expandv = expandV();
}