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Question about macro "sqrtf" (DriectX9)

 
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afatdog
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PostPosted: Mon Dec 18, 2006 9:10 am    Post subject: Question about macro "sqrtf" (DriectX9) Reply with quote


I want to use DriectX9 to capture the screen to a file, and the code is
here:

#include "d3d9.h"
#include "d3dx9tex.h"

IDirect3DDevice9* __fastcall CreateNULLRefDevice()
{
HRESULT hr;
IDirect3D9* pD3D = Direct3DCreate9( D3D_SDK_VERSION );
if( NULL == pD3D )
return NULL;

D3DDISPLAYMODE Mode;
pD3D->GetAdapterDisplayMode(0, &Mode);

D3DPRESENT_PARAMETERS pp;
ZeroMemory( &pp, sizeof(D3DPRESENT_PARAMETERS) );
pp.BackBufferWidth = 1;
pp.BackBufferHeight = 1;
pp.BackBufferFormat = Mode.Format;
pp.BackBufferCount = 1;
pp.SwapEffect = D3DSWAPEFFECT_COPY;
pp.Windowed = TRUE;

IDirect3DDevice9* pd3dDevice;
hr = pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_NULLREF,
GetDesktopWindow(),
D3DCREATE_HARDWARE_VERTEXPROCESSING, &pp,
&pd3dDevice );
SAFE_RELEASE( pD3D );
if( FAILED(hr) || pd3dDevice == NULL )
return NULL;

return pd3dDevice;
}

void __fastcall TForm_xxxx::Button3Click(TObject *Sender)
{
IDirect3DSurface9* pSurface;
IDirect3DDevice9* g_pd3dDevice;
IDirect3D9* pD3D = Direct3DCreate9(D3D_SDK_VERSION);
g_pd3dDevice=CreateNULLRefDevice();
g_pd3dDevice->CreateOffscreenPlainSurface(1024, 768, D3DFMT_A8R8G8B8,
D3DPOOL_SYSTEMMEM, &pSurface, NULL);
g_pd3dDevice->GetFrontBufferData(0, pSurface);
D3DXSaveSurfaceToFile("Desktop.bmp", D3DXIFF_BMP, pSurface, NULL, NULL);
pSurface->Release();
}

Question:
BCB5 return some errors:
[C++ Error] d3dx9math.inl(1578): E2268 Call to undefined function 'sqrtf'
[C++ Error] d3dx9math.inl(1710): E2268 Call to undefined function 'sqrtf'
[C++ Error] d3dx9math.inl(1855): E2268 Call to undefined function 'sqrtf'
[C++ Error] d3dx9math.inl(2025): E2268 Call to undefined function 'sqrtf'

I can find the macro "sqrtf" in VC6's VC6\Include\MATH.h, but not in
$(BCB)\Include\math.h

How to resolve this?

Thanks!
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afatdog
Guest
PostPosted: Mon Dec 18, 2006 3:34 pm    Post subject: Re: Question about macro "sqrtf" (DriectX9) Reply with quote


I fixed that problem. Add two lines (copy the defination of "sqrtf" from
VC6\Include\MATH.h):

double __cdecl sqrt(double);
inline float sqrtf(float _X) {return ((float)sqrt((double)_X)); }

And it work. Is this the right way?
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Jonathan Benedicto
Guest
PostPosted: Mon Dec 18, 2006 9:04 pm    Post subject: Re: Question about macro "sqrtf" (DriectX9) Reply with quote


afatdog wrote:
Quote:
And it work. Is this the right way?

It is one way, the other is to go into the Project Options -> Conditional
Defines, and enter sqrtf=sqrt; IIRC.

Jonathan
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Bruce Salzman
Guest
PostPosted: Mon Dec 18, 2006 9:48 pm    Post subject: Re: Question about macro "sqrtf" (DriectX9) Reply with quote
"afatdog" <afatdog.hn (AT) yeah (DOT) net> wrote in message
news:4586628c (AT) newsgroups (DOT) borland.com...
Quote:
I fixed that problem. Add two lines (copy the defination of "sqrtf"
from VC6\Include\MATH.h):

double __cdecl sqrt(double);
inline float sqrtf(float _X) {return ((float)sqrt((double)_X)); }

And it work. Is this the right way?


There is really no need to cast the result of sqrt() to a float. The
compiler will do that implicitly if you assign a double to a float.

--
Bruce
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afatdog
Guest
PostPosted: Tue Dec 19, 2006 9:10 am    Post subject: Re: Question about macro "sqrtf" (DriectX9) Reply with quote
Thank you for your advice.

Other questions:
1. Is this the fastest way(DirectX) to get the screen shot? I only want to
read the screen in memory, not always need to save as a file.
2. How to get a specify windows scrren shot? Not the entire screen. Just
like ALT+PrintScreen.
3. If a window was minimized or hidden by another window, can I get the
screen shot all the same?

Thanks you ^_^
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Michel Leunen
Guest
PostPosted: Wed Dec 20, 2006 1:13 am    Post subject: Re: Question about macro "sqrtf" (DriectX9) Reply with quote
afatdog wrote:

Quote:
Other questions:
1. Is this the fastest way(DirectX) to get the screen shot? I only want to
read the screen in memory, not always need to save as a file.
2. How to get a specify windows scrren shot? Not the entire screen. Just
like ALT+PrintScreen.
3. If a window was minimized or hidden by another window, can I get the
screen shot all the same?

Please, those questions were addressed many times before. Do a search on
google.

Michel
--
----------------------------------------
Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
----------------------------------------
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kutlu darılmaz
Guest
PostPosted: Tue Apr 03, 2007 6:59 pm    Post subject: opengl glut.h Reply with quote
Where can I find glut.h for C++Builder 6?

Thanks.
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JF Jolin
Guest
PostPosted: Thu Apr 05, 2007 5:30 pm    Post subject: Re: opengl glut.h Reply with quote
Old but still working


ftp://ftp.sgi.com/sgi/opengl/glut


__
JF Jolin
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