DIRECTX9 - SURFACE TO TEXTURE

Graphics and GPU Programming Programming

Started by Starkman January 11, 2013 02:36 PM

8 comments, last by Nik02 11 years, 3 months ago

106

Author

January 11, 2013 02:36 PM

i want to capture my Backbuffer into LPDIRECT3DSURFACE9 and then copy the surface into IDirect3DTexture9 finally use texture as my 3dobject skin . i wrote the codes but just received black pixels.it seems im wrong way on filling texture by surface .

Thanks for your help

IDirect3DTexture9* texture;

LPDIRECT3DSURFACE9 pd3dsBack = NULL;

void init()

{

D3DXCreateTexture(g_pd3dDevice,640,480,D3DUSAGE_DYNAMIC,

0,D3DFMT_X8R8G8B8,D3DPOOL_DEFAULT,&texture);

}

void render()

{

//scene (1)

g_pd3dDevice->BeginScene();

g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,

D3DCOLOR_COLORVALUE(0.0f,1.0f,0.0f,1.0f), 1.0f, 0);

//my 3d objects codes for draw into scene (1) .

g_pd3dDevice->EndScene();

//now try to get back-buffer into surface

g_pd3dDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pd3dsBack) ;

//i add this Save section to ensure the backbuffer data received complete and work.(it was ok and save complete true picture of Scene(1) ).

D3DXSaveSurfaceToFileA("BackbufferImage.BMP", D3DXIFF_BMP,pd3dsBack, NULL, NULL);

//this line fill the surface into texture ; if u think this way is false please give me a simple code to fill texture by surface.thanks

texture->GetSurfaceLevel(0, &pd3dsBack);

pd3dsBack->Release();//release my surface

//scene(2)

g_pd3dDevice->BeginScene();

g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,

D3DCOLOR_COLORVALUE(1.0f,0.0f,0.0f,1.0f), 1.0f, 0);

//now render my scene(2) and useing the texture object for draw it as skin of my 3d object

g_pd3dDevice->SetTexture( 0, texture );

g_pd3dDevice->EndScene();

g_pd3dDevice->Present( NULL, NULL, NULL, NULL );

}

Tispe

1,468

January 11, 2013 02:53 PM


LPDIRECT3DSURFACE9 dstsurf = NULL;
LPDIRECT3DSURFACE9 srcsurf = pYourSurface; //This can be your backbuffer
 
if (SUCCEEDED (pYourTexture->GetSurfaceLevel (0, &dstsurf)))
{
D3DXLoadSurfaceFromSurface (
dstsurf,
NULL,
NULL,
srcsurf,
NULL,
NULL,
D3DX_DEFAULT,
0
);

}
 
if (dstsurf) dstsurf->Release ();
if (srcsurf) srcsurf->Release ();

Starkman

106

Author

January 11, 2013 03:44 PM

worked and thanks Tispe.

but i need to a faster way (low fps) is there any way to copy backbuffer into texture ?

Postie

1,559

January 11, 2013 11:33 PM

If you use 0 as the value for the MipLevels parameter in D3DXCreateTexture() it tells DirectX to automatically generate an entire mipmap chain, which is likely the cause of your slow down. If you don't want mipmaps, use a value of 1 instead.

Incidentally, it seems like you have the MipLevels and Usage parameters passed to D3DXCreateTexture around the wrong way.

Try this line instead:


D3DXCreateTexture(g_pd3dDevice,640,480,1, D3DUSAGE_DYNAMIC, D3DFMT_X8R8G8B8,D3DPOOL_DEFAULT,&texture);

It's also good practise to test the return value of DirectX functions, since they can fail.

Lastly. you're not falling into the trap of writing the debugging bitmap to disk every frame are you? That amount of disk access to is sure to be slow. I normally hook them up to a key event, such as the shift key being held down. That way you can get the debug bitmap whenever you need it, but it doesn't affect your frame rate under normal conditions.

[size="2"]Currently working on an open world survival RPG - For info check out my Development blog:[size="2"] ByteWrangler

Tispe

1,468

January 12, 2013 06:08 PM

worked and thanks Tispe.

but i need to a faster way (low fps) is there any way to copy backbuffer into texture ?

You can render to a texture instead of backbuffer and then render texture to backbuffer using a quad with the texture.

http://www.two-kings.de/tutorials/dxgraphics/dxgraphics16.html

Adam_42

3,664

January 12, 2013 10:30 PM

There's also StretchRect() which you can use in conjunction with GetSurfaceLevel() to copy things around.

Starkman

106

Author

January 13, 2013 08:46 AM

Thank you guys your solutions are true and in finally i used GetRenderTarget with StretchRect() and it's work so fast now. thanks again.

Tispe

1,468

January 13, 2013 10:31 AM

Why would there be a performance gain using StretchRect() instead of CopySurfaceToSurface() ?

Is StretchRect() done on the GPU?

Starkman

106

Author

January 13, 2013 02:24 PM

i think it done on GPU cause i'm not set my texture or surface as a D3DPOOL_SYSTEMMEM.

Nik02

4,359

January 14, 2013 12:00 PM

StretchRect is done on the GPU if both source and destination reside on the GPU memory, and the driver/hardware supports it.

Niko Suni

DIRECTX9 - SURFACE TO TEXTURE

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