Vista - imaging performance

Hello,

I have some question about the image performance, I have a project where I
have to create images very fast, at this moment I use GDI+ to do that, also I
tried to use DirectX to create images but it seems that GPUs are not designed
for reading, to copy an image from a Surface is very slow.

My question is how is the WPF performace compared with GDI+, for image
creation the power of GPU is used ?

Best regards,
Stefan

Hi Stefan,

The performance of the imaging CODECs within WPF (they are in WindowsCodecs.dll) are faster than what GDI+ provides. This holds true for both JPEG and TIFF.

What kind of performance metrics are you interested in looking at?

Robert.

-----Original Message-----
From: stefan_tabaranu
Posted At: Thursday, January 05, 2006 6:06 AM
Posted To: microsoft.public.windows.developer.winfx.avalon
Conversation: imaging performance
Subject: imaging performance


Hello,

I have some question about the image performance, I have a project where I
have to create images very fast, at this moment I use GDI+ to do that, also I
tried to use DirectX to create images but it seems that GPUs are not designed
for reading, to copy an image from a Surface is very slow.

My question is how is the WPF performace compared with GDI+, for image
creation the power of GPU is used ?

Best regards,
Stefan

In my test I only draw something on the image and after that I save the image
on the hard drive like this:

while (true)
{

gfx.DrawString(new Guid().ToString(), font, new
SolidBrush(Color.Black), 10, 10);
image.Save(@"c:\temp\" + Guid.NewGuid().ToString() + ".gif",
ImageFormat.Gif);

count++;
t2 = DateTime.Now;
TimeSpan timeSpan = t2 - t1;



if (timeSpan.TotalMilliseconds > 1000)
{
Console.WriteLine("IPS : " + count);
t1 = DateTime.Now;
count = 0;
}
}

and I print the number of images per second, with GDI+ I can create up to 70
less or more images per second. At this moment I don't know yet how I can
draw something on a image in Wpf.

Best regards,
Stefan


"robertwl@nospam.microsoft.com" wrote:

> Hi Stefan,
>
> The performance of the imaging CODECs within WPF (they are in WindowsCodecs.dll) are faster than what GDI+ provides. This holds true for both JPEG and TIFF.
>
> What kind of performance metrics are you interested in looking at?
>
> Robert.
>
> -----Original Message-----
> From: stefan_tabaranu
> Posted At: Thursday, January 05, 2006 6:06 AM
> Posted To: microsoft.public.windows.developer.winfx.avalon
> Conversation: imaging performance
> Subject: imaging performance
>
>
> Hello,
>
> I have some question about the image performance, I have a project where I
> have to create images very fast, at this moment I use GDI+ to do that, also I
> tried to use DirectX to create images but it seems that GPUs are not designed
> for reading, to copy an image from a Surface is very slow.
>
> My question is how is the WPF performace compared with GDI+, for image
> creation the power of GPU is used ?
>
> Best regards,
> Stefan
>

In order to draw visuals into an image, try using the RenderTargetBitmap. With the RenderTargetBitmap, you can save that to a file.

Sample:

using System.Windows.Media;
using System.Windows.Media.Imaging;

...

RenderTargetBitmap rtb = new RenderTargetBitmap(width, height, dpiX, dpiY, PixelFormats.Pbgra32);

// visual is where your text, graphics, etc is
rtb.Render(visual);

PngBitmapEncoder png = new PngBitmapEncoder();
png.Frames.Add(BitmapFrame.Create(rtb));
using (Stream stm = File.Create("foo.png"))
{
png.Save(stm);
}

-----Original Message-----
From: stefan_tabaranu
Posted At: Thursday, January 05, 2006 11:43 PM
Posted To: microsoft.public.windows.developer.winfx.avalon
Conversation: imaging performance
Subject: re: imaging performance


In my test I only draw something on the image and after that I save the image
on the hard drive like this:

while (true)
{

gfx.DrawString(new Guid().ToString(), font, new
SolidBrush(Color.Black), 10, 10);
image.Save(@"c:\temp\" + Guid.NewGuid().ToString() + ".gif",
ImageFormat.Gif);

count++;
t2 = DateTime.Now;
TimeSpan timeSpan = t2 - t1;



if (timeSpan.TotalMilliseconds > 1000)
{
Console.WriteLine("IPS : " + count);
t1 = DateTime.Now;
count = 0;
}
}

and I print the number of images per second, with GDI+ I can create up to 70
less or more images per second. At this moment I don't know yet how I can
draw something on a image in Wpf.

Best regards,
Stefan


"robertwl@nospam.microsoft.com" wrote:

> Hi Stefan,
>
> The performance of the imaging CODECs within WPF (they are in WindowsCodecs.dll) are faster than what GDI+ provides. This holds true for both JPEG and TIFF.
>
> What kind of performance metrics are you interested in looking at?
>
> Robert.
>
> -----Original Message-----
> From: stefan_tabaranu
> Posted At: Thursday, January 05, 2006 6:06 AM
> Posted To: microsoft.public.windows.developer.winfx.avalon
> Conversation: imaging performance
> Subject: imaging performance
>
>
> Hello,
>
> I have some question about the image performance, I have a project where I
> have to create images very fast, at this moment I use GDI+ to do that, also I
> tried to use DirectX to create images but it seems that GPUs are not designed
> for reading, to copy an image from a Surface is very slow.
>
> My question is how is the WPF performace compared with GDI+, for image
> creation the power of GPU is used ?
>
> Best regards,
> Stefan
>

Thx a lot Robert for you response.

Also those types for imaging are using GPU video card or the PC CPU it's
used ?

Best regards,
Stefan

"robertwl@nospam.microsoft.com" wrote:

> In order to draw visuals into an image, try using the RenderTargetBitmap. With the RenderTargetBitmap, you can save that to a file.
>
> Sample:
>
> using System.Windows.Media;
> using System.Windows.Media.Imaging;
>
> ...
>
> RenderTargetBitmap rtb = new RenderTargetBitmap(width, height, dpiX, dpiY, PixelFormats.Pbgra32);
>
> // visual is where your text, graphics, etc is
> rtb.Render(visual);
>
> PngBitmapEncoder png = new PngBitmapEncoder();
> png.Frames.Add(BitmapFrame.Create(rtb));
> using (Stream stm = File.Create("foo.png"))
> {
> png.Save(stm);
> }
>
> -----Original Message-----
> From: stefan_tabaranu
> Posted At: Thursday, January 05, 2006 11:43 PM
> Posted To: microsoft.public.windows.developer.winfx.avalon
> Conversation: imaging performance
> Subject: re: imaging performance
>
>
> In my test I only draw something on the image and after that I save the image
> on the hard drive like this:
>
> while (true)
> {
>
> gfx.DrawString(new Guid().ToString(), font, new
> SolidBrush(Color.Black), 10, 10);
> image.Save(@"c:\temp\" + Guid.NewGuid().ToString() + ".gif",
> ImageFormat.Gif);
>
> count++;
> t2 = DateTime.Now;
> TimeSpan timeSpan = t2 - t1;
>
>
>
> if (timeSpan.TotalMilliseconds > 1000)
> {
> Console.WriteLine("IPS : " + count);
> t1 = DateTime.Now;
> count = 0;
> }
> }
>
> and I print the number of images per second, with GDI+ I can create up to 70
> less or more images per second. At this moment I don't know yet how I can
> draw something on a image in Wpf.
>
> Best regards,
> Stefan
>
>
> "robertwl@nospam.microsoft.com" wrote:
>
> > Hi Stefan,
> >
> > The performance of the imaging CODECs within WPF (they are in WindowsCodecs.dll) are faster than what GDI+ provides. This holds true for both JPEG and TIFF.
> >
> > What kind of performance metrics are you interested in looking at?
> >
> > Robert.
> >
> > -----Original Message-----
> > From: stefan_tabaranu
> > Posted At: Thursday, January 05, 2006 6:06 AM
> > Posted To: microsoft.public.windows.developer.winfx.avalon
> > Conversation: imaging performance
> > Subject: imaging performance
> >
> >
> > Hello,
> >
> > I have some question about the image performance, I have a project where I
> > have to create images very fast, at this moment I use GDI+ to do that, also I
> > tried to use DirectX to create images but it seems that GPUs are not designed
> > for reading, to copy an image from a Surface is very slow.
> >
> > My question is how is the WPF performace compared with GDI+, for image
> > creation the power of GPU is used ?
> >
> > Best regards,
> > Stefan
> >
>

Using RenderTargetBitmap is a software-only (ie: PC-CPU) pathway.

Robert.

-----Original Message-----
From: stefan_tabaranu
Posted At: Friday, January 06, 2006 3:21 PM
Posted To: microsoft.public.windows.developer.winfx.avalon
Conversation: imaging performance
Subject: re: imaging performance


Thx a lot Robert for you response.

Also those types for imaging are using GPU video card or the PC CPU it's
used ?

Best regards,
Stefan

"robertwl@nospam.microsoft.com" wrote:

> In order to draw visuals into an image, try using the RenderTargetBitmap. With the RenderTargetBitmap, you can save that to a file.
>
> Sample:
>
> using System.Windows.Media;
> using System.Windows.Media.Imaging;
>
> ...
>
> RenderTargetBitmap rtb = new RenderTargetBitmap(width, height, dpiX, dpiY, PixelFormats.Pbgra32);
>
> // visual is where your text, graphics, etc is
> rtb.Render(visual);
>
> PngBitmapEncoder png = new PngBitmapEncoder();
> png.Frames.Add(BitmapFrame.Create(rtb));
> using (Stream stm = File.Create("foo.png"))
> {
> png.Save(stm);
> }
>
> -----Original Message-----
> From: stefan_tabaranu
> Posted At: Thursday, January 05, 2006 11:43 PM
> Posted To: microsoft.public.windows.developer.winfx.avalon
> Conversation: imaging performance
> Subject: re: imaging performance
>
>
> In my test I only draw something on the image and after that I save the image
> on the hard drive like this:
>
> while (true)
> {
>
> gfx.DrawString(new Guid().ToString(), font, new
> SolidBrush(Color.Black), 10, 10);
> image.Save(@"c:\temp\" + Guid.NewGuid().ToString() + ".gif",
> ImageFormat.Gif);
>
> count++;
> t2 = DateTime.Now;
> TimeSpan timeSpan = t2 - t1;
>
>
>
> if (timeSpan.TotalMilliseconds > 1000)
> {
> Console.WriteLine("IPS : " + count);
> t1 = DateTime.Now;
> count = 0;
> }
> }
>
> and I print the number of images per second, with GDI+ I can create up to 70
> less or more images per second. At this moment I don't know yet how I can
> draw something on a image in Wpf.
>
> Best regards,
> Stefan
>
>
> "robertwl@nospam.microsoft.com" wrote:
>
> > Hi Stefan,
> >
> > The performance of the imaging CODECs within WPF (they are in WindowsCodecs.dll) are faster than what GDI+ provides. This holds true for both JPEG and TIFF.
> >
> > What kind of performance metrics are you interested in looking at?
> >
> > Robert.
> >
> > -----Original Message-----
> > From: stefan_tabaranu
> > Posted At: Thursday, January 05, 2006 6:06 AM
> > Posted To: microsoft.public.windows.developer.winfx.avalon
> > Conversation: imaging performance
> > Subject: imaging performance
> >
> >
> > Hello,
> >
> > I have some question about the image performance, I have a project where I
> > have to create images very fast, at this moment I use GDI+ to do that, also I
> > tried to use DirectX to create images but it seems that GPUs are not designed
> > for reading, to copy an image from a Surface is very slow.
> >
> > My question is how is the WPF performace compared with GDI+, for image
> > creation the power of GPU is used ?
> >
> > Best regards,
> > Stefan
> >
>

Thx a lot Robert, I finally have a clear understanding about how the wpf
imaging works.

Best regards,
Stefan

"robertwl@nospam.microsoft.com" wrote:

> Using RenderTargetBitmap is a software-only (ie: PC-CPU) pathway.
>
> Robert.
>
> -----Original Message-----
> From: stefan_tabaranu
> Posted At: Friday, January 06, 2006 3:21 PM
> Posted To: microsoft.public.windows.developer.winfx.avalon
> Conversation: imaging performance
> Subject: re: imaging performance
>
>
> Thx a lot Robert for you response.
>
> Also those types for imaging are using GPU video card or the PC CPU it's
> used ?
>
> Best regards,
> Stefan
>
> "robertwl@nospam.microsoft.com" wrote:
>
> > In order to draw visuals into an image, try using the RenderTargetBitmap. With the RenderTargetBitmap, you can save that to a file.
> >
> > Sample:
> >
> > using System.Windows.Media;
> > using System.Windows.Media.Imaging;
> >
> > ...
> >
> > RenderTargetBitmap rtb = new RenderTargetBitmap(width, height, dpiX, dpiY, PixelFormats.Pbgra32);
> >
> > // visual is where your text, graphics, etc is
> > rtb.Render(visual);
> >
> > PngBitmapEncoder png = new PngBitmapEncoder();
> > png.Frames.Add(BitmapFrame.Create(rtb));
> > using (Stream stm = File.Create("foo.png"))
> > {
> > png.Save(stm);
> > }
> >
> > -----Original Message-----
> > From: stefan_tabaranu
> > Posted At: Thursday, January 05, 2006 11:43 PM
> > Posted To: microsoft.public.windows.developer.winfx.avalon
> > Conversation: imaging performance
> > Subject: re: imaging performance
> >
> >
> > In my test I only draw something on the image and after that I save the image
> > on the hard drive like this:
> >
> > while (true)
> > {
> >
> > gfx.DrawString(new Guid().ToString(), font, new
> > SolidBrush(Color.Black), 10, 10);
> > image.Save(@"c:\temp\" + Guid.NewGuid().ToString() + ".gif",
> > ImageFormat.Gif);
> >
> > count++;
> > t2 = DateTime.Now;
> > TimeSpan timeSpan = t2 - t1;
> >
> >
> >
> > if (timeSpan.TotalMilliseconds > 1000)
> > {
> > Console.WriteLine("IPS : " + count);
> > t1 = DateTime.Now;
> > count = 0;
> > }
> > }
> >
> > and I print the number of images per second, with GDI+ I can create up to 70
> > less or more images per second. At this moment I don't know yet how I can
> > draw something on a image in Wpf.
> >
> > Best regards,
> > Stefan
> >
> >
> > "robertwl@nospam.microsoft.com" wrote:
> >
> > > Hi Stefan,
> > >
> > > The performance of the imaging CODECs within WPF (they are in WindowsCodecs.dll) are faster than what GDI+ provides. This holds true for both JPEG and TIFF.
> > >
> > > What kind of performance metrics are you interested in looking at?
> > >
> > > Robert.
> > >
> > > -----Original Message-----
> > > From: stefan_tabaranu
> > > Posted At: Thursday, January 05, 2006 6:06 AM
> > > Posted To: microsoft.public.windows.developer.winfx.avalon
> > > Conversation: imaging performance
> > > Subject: imaging performance
> > >
> > >
> > > Hello,
> > >
> > > I have some question about the image performance, I have a project where I
> > > have to create images very fast, at this moment I use GDI+ to do that, also I
> > > tried to use DirectX to create images but it seems that GPUs are not designed
> > > for reading, to copy an image from a Surface is very slow.
> > >
> > > My question is how is the WPF performace compared with GDI+, for image
> > > creation the power of GPU is used ?
> > >
> > > Best regards,
> > > Stefan
> > >
> >
>