Solve translucency issue when drawing paths.

    bitmap.eraseColor(0);

    SkPaint pathPaint(*paint);

    if (!pathPaint.getXfermode()) {

    // Make sure the paint is opaque, color, alpha, filter, etc.

    // will be applied later when compositing the alpha8 texture

    pathPaint.setColor(0xff000000);

    pathPaint.setAlpha(255);

    pathPaint.setColorFilter(NULL);

    pathPaint.setMaskFilter(NULL);

    pathPaint.setShader(NULL);

    SkXfermode* mode = SkXfermode::Create(SkXfermode::kSrc_Mode);

    pathPaint.setXfermode(mode)->safeUnref();

    }

    SkCanvas canvas(bitmap);

    canvas.translate(-bounds.fLeft + offset, -bounds.fTop + offset);