SDI Technologies iH30 Especificações descarregar pdf (Página 31)

Data Transfer

Quadro SDI Output PG-03776-001_v06 | 26

Code Listing 22: Sending Two Video Fill Channels

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo1Id);

drawPattern1();

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo2Id);

drawPattern2();

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

glPresentFrameDualFillNV(1, 0, 0, 0, GL_FRAME_NV,

GL_RENDERBUFFER_EXT, renderbuffer1Id,

GL_NONE, 0,

GL_RENDERBUFFER_EXT, renderbuffer2Id,

GL_NONE,0);

5.6 SENDING PBUFFER DATA

On Windows, an application sends graphics data to the video device by rendering

frames or fields into a pbuffer and then calling

wglSendPbufferToVideoNV() to

indicate that OpenGL rendering is complete and that the pbuffer is ready to be scanned

out by the video device. The call to this function should typically be placed at the end of

the application draw loop.

BOOL wglSendPbufferToVideoNV (HPBUFFERARB hPbuffer,

int iBufferType,

unsigned long *pulCounterPbuffer,

BOOL bBlock);

The parameter hPbuffer is the handle of the pbuffer. Both frames and fields can be sent

to the video device as indicated by the value of

iBufferType and the relative size of the

pbuffer as outlined in Table 5-1 and Table 5-2.

Table 5-1. Pbuffer Size = Field

iBufferType Pbuffer Size = Field

WGL_VIDEO_OUT_FIELD_1 Field 0

WGL_VIDEO_OUT_FIELD_2 Field 1

WGL_VIDEO_OUT_FRAME Half height frame

WGL_VIDEO_OUT_STACKED_FIELDS_1_2 Half height frame

WGL_VIDEO_OUT_STACKED_FIELDS_2_1 Half height frame

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