DirectX Tutorial for screen painting

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Now I draw video sources to the video at WM_PAINT message.

basically when I receive a frame from my source, I call Invalidate() and in the OnPaint message I draw my frame with
screenDC.BitBlt( clpRect.left, clpRect.top, clpRect.Width(), clpRect.Height(), &m_dbd.memDC, clpRect.left, clpRect.top, SRCCOPY );

when I have many fps to show, with this architecture I have performance problem, in another question many people suggested me to pass to a directx architecture in order to improve performance. I try to search on internet some tutorial, but all of them are very complicated, they teach how to work with complex geometric objects, texture, 3d etc... rather I need something easier, I need just to paint my bmp frame (stored in memory) to the screen, that's it, no advanced texture, no sprite, no geometrics draw, no 3d, just fit my bmp on screen, finish . It shouldn't be really complicated. Where can I find a tutorial or help?

Posted 4-May-12 4:10am

druscelli

Updated 4-May-12 4:11am

v2

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druscelli 7-May-12 6:30am

do you think this solution could be suitable for me?

http://www.codeproject.com/Articles/10172/2D-Blits-in-DirectX-9

In the article says
"Of course, when direct access to the surfaces is not needed, you would be better off using the standard D3D blitting routines, which are hardware accelerated and as a result are faster than the software 2D blits in my code."

So this solution is not hardware accelerated?

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Espen Harlinn · Accepted Answer · 2012-05-04T09:10:00

Solution 1

If you haven't looked at this, it's a good reference:
Improving the Performance of Direct2D Applications[^]

This one is also useful:
Direct2D: Hardware Acceleration in Windows 7 Plotting[^]

[Update]
For XP and OpenGL have a look at PicZoom: A Photo Viewer Created in OpenGL[^]

Best regards
Espen Harlinn

Posted 4-May-12 9:10am

Espen Harlinn

Updated 7-May-12 5:05am

v2

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JackDingler 4-May-12 15:25pm

To clarify, what you need to do is create a simple 2D Mesh that is scaled to fit the client area of your window. For this purpose a single QUAD can do the trick.

You'll select your image into it as a texture.

Then render.

********

So displaying a textured mesh is the kind of sample you want to start with.
I have no tips for DirectX, I've only done this with OpenGL, but the concepts are the same.

Espen Harlinn 4-May-12 15:31pm

The first article covers the required steps ...

druscelli 7-May-12 5:16am

For information: I don't need to scale the image, the frame is just to paint as is. Thanks for the informations and the links, I will look at them, thanks.

JackDingler 7-May-12 10:25am

If you're going to use a graphics accelerated technology, you will be scaling, even it's 1:1.

You're understand better once you have a basic implementation started.

druscelli 7-May-12 6:03am

Looks like direct2d is just supported on win7 and win2008 server... Do you think could I find a solution supported on winxp?

JackDingler 7-May-12 10:22am

OpenGL

http://www.opengl.org/wiki/Code_Resources
http://www.gamedev.net/page/resources/_/technical/opengl/opengl-texture-mapping-an-introduction-r947

Ignore the warning about the samples being deprecated. for simple texture drawing, you'll be fine.

Espen Harlinn 7-May-12 11:04am

For XP I'd take a look at OpenGL, as recommended by Jack.
Use The OpenGL Extension Wrangler Library:http://glew.sourceforge.net/
to access features not provided by the old windows SDK.

JackDingler 7-May-12 11:07am

Many OpenGl examples for windows use a memory DC and then bitblt to the window. This won't speed things up for you.

You'll want to associated the OpenGL Context with the WindowDC, and be sure your window is created with the CS_OWNDC flag.

Espen Harlinn 7-May-12 18:48pm

Good points Jack :-D

Sandeep Mewara 4-May-12 15:33pm

Good links. 5!

Espen Harlinn 4-May-12 15:33pm

Thank you, Sandeep :-D

Sergey Alexandrovich Kryukov 5-May-12 22:19pm

Good links, my 5.
--SA

Espen Harlinn 7-May-12 3:01am

Thank you, Sergey :-D

Wendelius 23-May-12 0:08am

Good answer!

Espen Harlinn 23-May-12 4:28am

Thank you Mika :-D