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New Post: Video subtitles

franz1986 — Mon, 13 Jun 2011 23:08:44 GMT

It seems that m_PngOutlineText.MeasureString is a real performance killer...
Instead I tried with graphics.MeasureString to get the dimensions and it works without any problems.

New Post: Video subtitles

franz1986 — Mon, 13 Jun 2011 15:30:33 GMT

Hello.

First of all let me just say that I think this is a great library, truly amazing.

Now, onto my problem =)
I've been trying to write a DShow filter do display subtitles on video.
So far I've managed to get the video, and write subtitle text on a transparent overlay bmp, but text rendering is slow and not of very nice quality.
Can you please help me and maybe point out what I'm doing wrong...

Here's my code, I'm calling this method for every video frame...

private void PrintSub(clsTitl titl, IntPtr pBuffer)
        {
            using (Graphics g = Graphics.FromImage(bitmapOverlay))
            {
                g.Clear(Color.Transparent);

                float sirinaStringa = 0, visinaStringa = 0, bla = 0, blu = 0;

                g.SmoothingMode = SmoothingMode.AntiAlias;
                g.InterpolationMode = InterpolationMode.HighQualityBicubic;

                //Drawing the back ground color
                Color m_clrBkgd = Color.FromArgb(255, 255, 128);
                SolidBrush brushBkgnd = new SolidBrush(m_clrBkgd);
                //e.Graphics.FillRectangle(brushBkgnd, 0, 0, this.ClientSize.Width, this.ClientSize.Width);
                FontFamily fontFamily = new FontFamily("Arial");

                StringFormat strFormat = new StringFormat();
                strFormat.Alignment = StringAlignment.Center;

                PngOutlineText m_PngOutlineText = new PngOutlineText();
                m_PngOutlineText.EnableShadow(true);

                //Rem to SetNullShadow() to release memory if a previous shadow has been set.
                m_PngOutlineText.SetNullShadow();
                m_PngOutlineText.DiffusedShadow(Color.FromArgb(255, 0, 0, 0), 2, new Point(2, 2));


                m_PngOutlineText.MeasureString(g, fontFamily, FontStyle.Bold, 32, titl.SubtitleContent,
                    new Point(10, 10), strFormat, ref bla, ref blu, ref sirinaStringa, ref visinaStringa);

                m_PngOutlineText.TextGlow(
                    Color.FromArgb(255, 255, 255),
                    Color.FromArgb(200, 0, 0, 0),
                    5);

                Bitmap m_pPngImage = new Bitmap((int)(sirinaStringa + 5.0f), (int)(visinaStringa + 5.0f),
                    System.Drawing.Imaging.PixelFormat.Format32bppArgb);

                m_PngOutlineText.SetPngImage(m_pPngImage);
                m_PngOutlineText.SetShadowBkgd(m_clrBkgd, m_pPngImage.Width, m_pPngImage.Height);

                //Pozicija na ekranu
                m_PngOutlineText.DrawString(g, fontFamily, FontStyle.Bold, 32, titl.SubtitleContent, new Point(0, 0), strFormat);
                m_pPngImage.RotateFlip(RotateFlipType.RotateNoneFlipY);

                using (Bitmap v = new Bitmap(m_videoWidth, m_videoHeight, m_stride,
                    PixelFormat.Format32bppArgb, pBuffer))
                {
                    using (Graphics graf = Graphics.FromImage(v))
                    {
                        int pozicija = (m_videoWidth / 2);// -(m_pPngImage.Width / 2);
                        graf.DrawImage(m_pPngImage, pozicija, 0, m_pPngImage.Width, m_pPngImage.Height);
                    }
                }
            }
        }

New Post: MT/MTd linking

shaovoon — Thu, 31 Mar 2011 06:51:58 GMT

Hi Pabloko,

Thank you for your interest in TextDesigner! There is no plans for a dll version at the moment because it is not easy to do a dll version as I need to export all the GDI/GDI+ classes used in TextDesigner. However, if you managed to do a dll version, I'll be more than glad to add it inside the SVN repository.

New Post: MT/MTd linking

Pabloko — Mon, 28 Mar 2011 02:17:06 GMT

Hi, first great work with TextDesigner, there are any chance to compile using MT with dinamic linking?

New Post: You need to dispose your GDI+ objects

luisarvayo — Thu, 17 Mar 2011 19:49:17 GMT

Thank you very much....The best outline library I have seen....

New Post: You need to dispose your GDI+ objects

shaovoon — Sun, 13 Mar 2011 14:17:30 GMT

Hi luisarvayo,

Thanks for the heads up! :)

Your suggestion and IDisposable is implemented.

New Post: You need to dispose your GDI+ objects

luisarvayo — Sat, 12 Mar 2011 00:55:13 GMT

Hello,

I like this library very much.

It would be perfect if you dispose of objects as soon as those are not needed. For instance:

            GraphicsPath path = new GraphicsPath();
	        path.AddString(strText, fontFamily, (int)fontStyle, fontSize, ptDraw, strFormat);

	        for(int i=1; i<=m_nThickness; ++i)
	        {
	            Pen pen = new Pen(m_clrOutline,i);
	            pen.LineJoin=LineJoin.Round;
	            graphics.DrawPath(pen, path);
            }

            if (m_bClrText)
            {
                SolidBrush brush = new SolidBrush(m_clrText);
                graphics.FillPath(brush, path);
            }
            else
                graphics.FillPath(m_brushText, path);

	        return true;

You must change to:

            using (GraphicsPath path = new GraphicsPath())
            {
                path.AddString(strText, fontFamily, (int)fontStyle, fontSize, ptDraw, strFormat);

                for (int i = 1; i <= m_nThickness; ++i)
                {
                    using (Pen pen = new Pen(m_clrOutline, i))
                    {
                        pen.LineJoin = LineJoin.Round;
                        graphics.DrawPath(pen, path);
                    }
                }

                if (m_bClrText)
                {
                    using (SolidBrush brush = new SolidBrush(m_clrText))
                    {
                        graphics.FillPath(brush, path);
                    }
                }
                else
                    graphics.FillPath(m_brushText, path);
            }

	        return true;

Additionally, you must dispose class level GDI+ objects like this in TextGlowStrategy:

protected System.Drawing.Brush m_brushText;

Regards

New Post: memory leak?

shaovoon — Wed, 30 Jun 2010 14:52:21 GMT

Hi kendang, I have solved the memory leaks.

You can download the latest source here: http://outlinetext.codeplex.com/SourceControl/list/changesets

I have also made the GDI fonts appear the same size as the GDI+ fonts.

I hope you can continue to use the library because there are 3 more exciting outline styles coming up. And I am considering to add FreeType, Uniscribe and DirectWrite support in near future! And a xml config file to configure the engine. And also a plan to make this library cross platform, using Freetype library.

Thanks! :)

New Post: memory leak?

kendang — Wed, 16 Jun 2010 21:24:03 GMT

Thank you very much for your reply.

After I did some debug, I found GDI+ Graphics::DrawPath (Get GraphicsPath from string) will take some memory after every call. But I did not find any know issues about it when I google it.

Let me know if I can help.

New Post: memory leak?

shaovoon — Wed, 16 Jun 2010 09:55:21 GMT

Hi Kendang, Thanks for bringing my attention to the memory leaks. There are very serious memory problems with the structural design of the library which are not easy to fix. But I'll fix it as soon as possible. Thanks!!

New Post: memory leak?

kendang — Wed, 09 Jun 2010 02:07:17 GMT

Firstly thank you very much for the great work.

But when I tried TestOutlineText.exe and repeated to switch text effect from such as single outline to double outline, I noticed the memory increases correspondingly. It seems there are memory leaks somewhere.

Also when I use the text designer library in my test vc++6.0 project, the memory also keeps increasing when I repeat to call DrawString from the same object of class OutlineText. Sometimes even 1M memory is increased in one time call.

Any advice?

New Post: Ability to outline shapes

shaovoon — Mon, 08 Mar 2010 07:34:33 GMT

Haha, Great minds thinks alike!! Maybe, I'll write new classes, based on the library, to take in a shape path.

:D

New Post: Ability to outline shapes

Yarp — Mon, 08 Mar 2010 07:20:55 GMT

While playing with the Library I thought it would be great to Outline shapes as well. The developer could provide the shape in an array of Points (like you do for Polyline).

This way we could add Stars, Circles, logos,... to the Render.

New Post: Silverlight support?

shaovoon — Wed, 24 Feb 2010 03:28:36 GMT

Hi jcmorin,

The library cannot be used in the Silverlight because it uses unsafe CSharp code, such as pointer to access the Bitmap's color bytes.

Thank you for your interest in this library.

New Post: OutLine Text on Compact Framework

gpe54 — Sat, 20 Feb 2010 16:43:10 GMT

That will be not easy: The Compact Framework doesn't have a "GraphicsPath"...

New Post: OutLine Text on Compact Framework

gpe54 — Sat, 20 Feb 2010 13:27:21 GMT

Hi shaovon,

I tried: It is impossible to append a Framework project to Compact Framework project. But, thank you for your answer. Now, I have to understand your code source for a smart translation... (I saw just recently that you give a link on home page with more detailed explanations).

New Post: OutLine Text on Compact Framework

shaovoon — Sat, 20 Feb 2010 09:13:57 GMT

Hi gpe54,

Very sorry for the late reply as I did not see your question until now. Prior to 0.3.0, everything is written in native C++, even the .NET wrapper, so it is impossible to use in Compact Framework. Since then, I have ported the C++ library to C# for writing the special effect framework. You can try to compile the TextDesignerCSLibrary, using the Compact Framework, to see whether it complains any unsupported methods. I do not have any experience in Compact Framework. Sorry.

New Post: dotNetOutlineText does not work in Windows 7 x64

wima75 — Sat, 20 Feb 2010 09:10:06 GMT

Hello

The C# version works fine, thank you.

wima

New Post: Silverlight support?

shaovoon — Sat, 20 Feb 2010 09:04:32 GMT

Hi jcmorin,

Sorry for the late reply. I am not a C#/Silverlight/WPF programmer, so I am not suitable to answer your question. From the BING search, WPF can do outline text. Not so sure about Silverlight.

http://msdn.microsoft.com/en-us/library/ms745816%28VS.85%29.aspx

Sorry for unable to be of any help.

New Post: dotNetOutlineText does not work in Windows 7 x64

shaovoon — Sat, 20 Feb 2010 08:56:29 GMT

Hi wima75,

You can try the latest 0.3.0 C# version and see if it solves your problem? C++/CLI dotNetOutLineText is obsolete and is replaced by the new C# library.