Form1.cs


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using Direct2D;
using DWrite;
using static DWrite.DWriteTools;
using WIC;
using GlobalStructures;
using static GlobalStructures.GlobalTools;
using System.Runtime.InteropServices;


namespace CSharp_ScrollingTextControl
{
    public partial class Form1 : Form
    {
        private ID2D1Factory m_pD2DFactory = null;
        private ID2D1Factory1 m_pD2DFactory1 = null;
        private IDWriteFactory m_pDWriteFactory = null;
        private IWICImagingFactory m_pWICImagingFactory = null;

        public Form1()
        {
            InitializeComponent();
            this.Load += Form1_Load;
            this.FormClosing += Form1_FormClosing;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            HRESULT hr = HRESULT.S_OK;

            this.DoubleBuffered = true;
            this.ClientSize = new System.Drawing.Size(660, 664);
            this.Text = "C# - Direct2D - Scrolling Text";

            hr = CreateD2D1Factory();
            if (SUCCEEDED(hr))
            {
                hr = CreateDWriteFactory();
                if (SUCCEEDED(hr))
                {
                    m_pWICImagingFactory = (IWICImagingFactory)Activator.CreateInstance(Type.GetTypeFromCLSID(WICTools.CLSID_WICImagingFactory));

                    // Initialize scrolling text controls
                    scrollingTextControl1.Initialize(m_pD2DFactory1, m_pDWriteFactory, m_pWICImagingFactory,
                        "This is a text with shadow", "Times New Roman", 35, 600, 500, 0, false, false, true);
                    scrollingTextControl1.TextColor = ColorF.Enum.Blue;
                    scrollingTextControl1.SetGradientBackground(ColorF.Enum.Yellow, ColorF.Enum.Red);
                    scrollingTextControl1.Speed = 1.5f;

                    scrollingTextControl2.Initialize(m_pD2DFactory1, m_pDWriteFactory, m_pWICImagingFactory,
                        "Text with Gabriola font and fading, speed = 0.5", "Gabriola", 48, 600, 500, 0, false, false, false, true);
                    scrollingTextControl2.SetGradientBackground(ColorF.Enum.Magenta, ColorF.Enum.DarkBlue);
                    scrollingTextControl2.TextColor = ColorF.Enum.Yellow;
                    scrollingTextControl2.Speed = 0.5f;

                    scrollingTextControl3.Initialize(m_pD2DFactory1, m_pDWriteFactory, m_pWICImagingFactory,
                        "This is a bold text, speed = 3", "Cooper Std", 35, 600, 500, 0, true);
                    scrollingTextControl3.SetGradientBackground(ColorF.Enum.Lime, ColorF.Enum.Orange);
                    scrollingTextControl3.TextColor = ColorF.Enum.Green;
                    scrollingTextControl3.Speed = 3.0f;                   

                    Image imgBackground = (Image)Properties.Resources.Flowers_Background;
                    using (System.IO.MemoryStream msBackground = new System.IO.MemoryStream())
                    {
                        imgBackground.Save(msBackground, imgBackground.RawFormat);
                        scrollingTextControl4.Initialize(m_pD2DFactory1, m_pDWriteFactory, m_pWICImagingFactory,
                            char.ConvertFromUtf32(0x1F496) + "Shadow Segoe UI Emoji" + char.ConvertFromUtf32(0x1F499) + "Vertical scrolling",
                            "Segoe UI Emoji", 40, 600, 500, 1, false, false, true);
                        scrollingTextControl4.SetBitmapBackground(msBackground);
                    }
                }
            }

            this.CenterToScreen();
        }

        public HRESULT CreateD2D1Factory()
        {
            HRESULT hr = HRESULT.S_OK;

            D2D1_FACTORY_OPTIONS options = new D2D1_FACTORY_OPTIONS();            
#if DEBUG
            options.debugLevel = D2D1_DEBUG_LEVEL.D2D1_DEBUG_LEVEL_INFORMATION;
#endif
            hr = D2DTools.D2D1CreateFactory(
                D2D1_FACTORY_TYPE.D2D1_FACTORY_TYPE_SINGLE_THREADED,
                ref D2DTools.CLSID_D2D1Factory,
                ref options,
                out m_pD2DFactory);

            m_pD2DFactory1 = (ID2D1Factory1)m_pD2DFactory;
            return hr;
        }

        public HRESULT CreateDWriteFactory()
        {
            HRESULT hr = HRESULT.S_OK;
            IntPtr pDWriteFactoryPtr = IntPtr.Zero;            
            hr = DWriteCreateFactory(DWRITE_FACTORY_TYPE.DWRITE_FACTORY_TYPE_SHARED, ref CLSID_DWriteFactory, out pDWriteFactoryPtr);
            if (SUCCEEDED(hr))
            {
                m_pDWriteFactory = Marshal.GetObjectForIUnknown(pDWriteFactoryPtr) as IDWriteFactory;
                if (pDWriteFactoryPtr != IntPtr.Zero)
                    Marshal.Release(pDWriteFactoryPtr);
            }
            return hr;
        }

        private void Clean()
        {
            SafeRelease(ref m_pDWriteFactory);
            SafeRelease(ref m_pD2DFactory1);
            SafeRelease(ref m_pD2DFactory);
            SafeRelease(ref m_pWICImagingFactory);
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            Clean();
        }
    }
}