Function renderGlyphsCairo

mapcairo.c:460–522

}

int renderGlyphsCairo(imageObj *img,double x, double y, labelStyleObj *style, char *text) {
    cairo_renderer *r = CAIRO_RENDERER(img);
    cairoCacheData *cache = MS_IMAGE_RENDERER_CACHE(img);
    faceCacheObj *face = getFontFace(cache,style->font);

    char *utfptr=text;
    int i,has_kerning,unicode;
    unsigned long previdx=0;
    int numglyphs = msGetNumGlyphs(text);
    cairo_glyph_t glyph;
    cairo_text_extents_t extents;
    double px=0,py=0;

    if(face == NULL) {
        return MS_FAILURE;
    }

    cairo_set_font_face(r->cr,face->face);
    cairo_set_font_size(r->cr,style->size*96/72.0);

    cairo_save(r->cr);
    cairo_translate(r->cr,MS_NINT(x),MS_NINT(y));
    if(style->rotation != 0.0)
       cairo_rotate(r->cr, -style->rotation);

    has_kerning = FT_HAS_KERNING((face->ftface));
    for(i=0;i<numglyphs;i++) {
        utfptr+=msUTF8ToUniChar(utfptr, &unicode);
        glyph.x=px;
        glyph.y=py;
        if(unicode=='\n') {
            py += ceil(style->size*CAIROLINESPACE);
            px = 0;
            previdx=0;
            continue;
        }
        glyph.index = FT_Get_Char_Index(face->ftface, unicode);
        if( has_kerning && previdx ) {
            FT_Vector delta;
            FT_Get_Kerning( face->ftface, previdx, glyph.index, FT_KERNING_DEFAULT, &delta );
            px += delta.x / 64.;
        }
        cairo_glyph_extents(r->cr,&glyph,1,&extents);
        cairo_glyph_path(r->cr,&glyph,1);
        px += extents.x_advance;
        previdx=glyph.index;
    }

    if (style->outlinewidth > 0) {
        cairo_save(r->cr);
        msCairoSetSourceColor(r->cr, style->outlinecolor);
        cairo_set_line_width(r->cr, style->outlinewidth + 1);
        cairo_stroke_preserve(r->cr);
        cairo_restore(r->cr);
    }
    if(style->color) {
        msCairoSetSourceColor(r->cr, style->color);
        cairo_fill(r->cr);