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bankey1010 wrote: Hello All,
i am working with a application by using VC++/MFC and Direct3d. i am new with Direct3D but in this application graphics is drawing using direct3d.
so i want to take printout of its view area means whatever drawing is there.
is there any way so that i can store the screen image into pixwl format into a buffer or a file, and than send to printer for taking printout.
or anyother way to do this.
In Windows, you can hold down the alt key and press the "print screen" key to copy an image of the active window into the cut/past buffer. Then you can bring up paint, use paste, and save or print the image. You can also use ctrl and "print screen" to copy the entire screen.
Nathan
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Hi,
Is there a way to convert a system.drawing.image to system.drawing.bitmap without having to save it to disk first.
Would appreciate any good help
thanks
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There's three System.Drawing.Bitmap constructors that take a System.Drawing.Image as a parameter...
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.freetls.fastly.net/script/Forums/Images/coffee.gif)
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Hi,
thanks for the reply. Im new with C# (started with TP and mainly work in php / MySQL) so constructors is all new to me... Been looking around and cant seem to find the right thing/way to do this.
if i have
System.Drawing.Image modimage;<br />
System.Drawing.Bitmap modbitmap;
changes are first done to modimage and then i want to do something like
modbitmap = modimage;
and then carry on with changes to modbitmap.
obviously the modbitmap = modimage; does not work as it is like trying to say
strSomething = intSomethign;
it would be nice if there was a thing like
modbitmap = modimage.tobitmap(); lol
anyway, my trials have proved fruitless so i am hoping that you would be kind enough to spare a min and help me out.
thanks in advance.
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Try this:
modbitmap = new System.Drawing.Bitmap(modimage);
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Try what GrinderDev suggested 
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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You could also just cast it... (This is a bit faster and uses less memory).
bitmap = (Bitmap)image;
Matthew Butler
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Yes, most of the time that will work; what if the image happens to be a Metafile?
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- use PRE tags to preserve formatting when showing multi-line code snippets
- before you ask a question here, search CodeProject, then Google
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I've never used metafiles.
...but I suppose that would give an error.
Do people still use wmf/emf?
I've always concidered them quite an old (and outdated) format.
Matthew Butler
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M. Butler wrote: Do people still use wmf/emf?
I don't know.
My point is: (Bitmap)Image.FromFile("test.WMF") could throw
since there is a difference between Bitmap and Image classes, so I prefer either the
constructor approach (hoping it is not too expensive) or an "is Bitmap" test (C#).
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- use PRE tags to preserve formatting when showing multi-line code snippets
- before you ask a question here, search CodeProject, then Google
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Good example of why casts are dangerous.
C# really allows casts? hehe
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Hi all,
I'm trying to get the simplest of D3D9 programs working (coloured window). But keep getting this error when I run the SDK samples, and a website's sample i'm trying to follow.
Error 1 error LNK2019: unresolved external symbol _Direct3DCreate9@4 referenced in function "long __cdecl InitD3D(struct HWND__ *)" (?InitD3D@@YAJPAUHWND__@@@Z) CreateDevice.obj <br />
Followed by...
Error 2 fatal error LNK1120: 1 unresolved externals e:\Program Files\DirectX SDK\Samples\C++\Direct3D\Tutorials\Tut01_CreateDevice\Debug\CreateDevice.exe 1 <br />
By trial and error, I think its this line thats screwing it up...
d3d = Direct3DCreate9(D3D_SDK_VERSION);
Any ideas on how to fix this?
Mark.
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Have you linked to d3d9.lib?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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Yea I think I did it right...
I had put:
#pragma comment(lib, "d3d9.lib");
in my code.
If you want to review the whole program, you can find it here.
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MarkBrock wrote: Yea I think I did it right...
If it linked, then it's good! 
Mark Salsbery
Microsoft MVP - Visual C++
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I have a very big view (i.e. city) with so many detailes on it, and it consumes time to draw/redraw it.
My problem is:  to select a street from that city, I have to ReDraw the scene/the whole city to do the picking and see the detailes of that street.
Does any one know how to do the selection / picking without redrawing every thing ?
![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif) Thank you
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belloSoft wrote: My problem is: to select a street from that city, I have to ReDraw the scene/the whole city to do the picking and see the detailes of that street.
Does any one know how to do the selection / picking without redrawing every thing ?
There are two ways to do picking, three if you count hybrids, but we'll stick with two. One uses the draw cycle evaluating which pixel you touched and what triangle it belongs to, and what group that triangle lies within, etc. That is hardware based and limited by the options available in hardware. http://web.engr.oregonstate.edu/~mjb/cs553/Handouts/Picking/picking.pdf[^] I assume from your message you are doing this.
The second type is via proximity or at least via spatial zone. There are many algorithms a google on "ray intersection octree" or "ray intersection triangle" will produce many ansers. For instance: http://giig.ugr.es/~rgarcia/Poster.pdf[^] You can also do cheap bounding box tests mathematically for large regions. A quad-tree search within a scene for a "picked" locaton can quickly differenciate what object (or objects) you are looking at, and then you can either do a ray-triangle test to find a specific triangle of that subset, or an OpenGL pick of ONLY those few objects of relative usefullness.
There is also obscuration testing. This is fairly new (last few generations) but certainly no longer leading edge stuff, but it will allow you to quickly reduce the objects being drawn to only those visible using an occlusion query. The more you can do to "cut down" what you draw the faster your draw-time. Why draw it at all if it is off the screen? why draw it if it is entirely hidden by another building? etc. Occlusion Query[^]
_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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Thank you !
I will try the first solution 
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You probably want to try using ray intersection tests (3d) or point in polygon tests. If drawing is slow then drawing related methods would be least appropriate.
Sounds like they are causing your problem already...
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Hi!
I have to do some calculations of GLC matrix and textural features in C++, but I don't know how to read an image and processing it like a matrix. This is very simple in Matlab, but I don't know how to do it in C++.
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In wich format do you have your Image?
JO
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Hi,
I have to get some properties of image files. Image file can be in any format and the properties i need is listed below
BitDepth of the image...
ColorSpace of the Image... whether it is RGB,GrayScale,CMYK or...
Number of bands in the image...
thanks for your help...
sniper47
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There might be something in the dotnet libary that can do this but I've never done that before so I don't know. I do know you can do it by opening a file as a file stream then reading the header for the file.
Basically the headers are usually different for different file types so you'll have to look up information on each of the file types you are interested in.
Hope this helps,
Mike
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Thanks for your replys. i have tried this property but i couldnt find which code means which property.
sniper47 Computer Engineer
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