SDI Technologies iH30 Spezifikationen PDF herunterladen (Seite 20)

Data Transfer

Quadro SDI Output PG-03776-001_v06 | 15

Creation of an FBO is identical on both Windows and Linux, and requires only a current

OpenGL context. In the previous code listing example, when a texture object is specified,

it is attached as

COLOR_ATTACHMENT0, otherwise, a renderbuffer is used. For more

information on FBO creation and usage, refer to the

GL_EXT_framebuffer_object

specification.

In order for an application to render into an FBO render target, the target must first be

bound using the command in Code Listing 9.

Code Listing 9: Configuring a Frame Buffer Object

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboId);

Either before or after buffer object creation, the SDI video device must be bound in

OpenGL. The procedure for enumerating the available video devices and binding one of

them is outlined in Code Listing 10.

Code Listing 10: Binding a Video Device

// Enumerate the available video devices and

// bind to the first one found

HVIDEOOUTPUTDEVICENV *videoDevices;

// Get list of available video devices.

int numDevices = wglEnumerateVideoDevicesNV(ghWinDC, NULL);

if (numDevices <= 0) {

MessageBox(NULL, "wglEnumerateVideoDevicesNV() did not return

any devices.", "Error", MB_OK);

exit(1);

}

videoDevices = (HVIDEOOUTPUTDEVICENV *)malloc(numDevices *

sizeof(HVIDEOOUTPUTDEVICENV));

if (!videoDevices) {

fprintf(stderr, "malloc failed. OOM?");

exit(1);

}

if (numDevices != wglEnumerateVideoDevicesNV(ghWinDC,

videoDevices)) {

free(videoDevices);

MessageBox(NULL, "Invonsistent results from

wglEnumerateVideoDevicesNV()", "Error", MB_OK);

exit(1);

}

//Bind the first device found.

if (!wglBindVideoDeviceNV(ghWinDC, 1, videoDevices[0], NULL)) {

free(videoDevices);

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