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Data Transfer

Quadro SDI Output PG-03776-001_v06 | 16

MessageBox(NULL, "Failed to bind a videoDevice to slot 0.\n",

"Error", MB_OK);

exit(1);

}

// Free list of available video devices, don't need it anymore.

free(videoDevices);

5.3 PBUFFER INITIALIZATION

On Windows, the first step in the initialization of the pbuffer is to use the function

wglChoosePixelFormatARB() to choose a compatible pixel format. For Quadro SDI

video output from a pbuffer render target, the list of attributes specified as the second

argument to this function must include

WGL_DRAW_TO_PBUFFER as well as one of

WGL_BIND_TO_VIDEO_RGB_NV, WGL_BIND_TO_VIDEO_RGBA_NV, or

WGL_BIND_TO_VIDEO_RGB_AND_DEPTH_NV. Code Listing 11 and Code Listing 12

illustrate this procedure for both the 8-bit and 16-bit cases.





Note: In the 16-bit floating point per-component case,

WGL_FLOAT_COMPONENTS_NV must also be specified in the attribute list.

Code Listing 11: Choosing an 8-bit Pixel Format

int format = 0;

int nformats = 0;

int attribList = {

WGL_RED_BITS_ARB, 8,

WGL_GREEN_BITS_ARB, 8,

WGL_BLUE_BITS_ARB, 8,

WGL_ALPHA_BITS_ARB, 8,

WGL_STENCIL_BITS_ARB, 8,

WGL_DEPTH_BITS_ARB, 24,

WGL_DRAW_TO_PBUFFER_ARB, true,

WGL_BIND_TO_VIDEO_RGBA_NV, true,

0 };

wglChoosePixelFormatARB(hDC, attribList, 1, &format, &nformats);

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