BOOL CLCDOutput::OnDraw(void)
{
DWORD dwPriorityToUse = LGLCD_ASYNC_UPDATE(m_nPriority);
if ( (NULL == m_pActivePage) ||
(LGLCD_INVALID_DEVICE == m_hDevice) ||
(LGLCD_PRIORITY_IDLE_NO_SHOW == dwPriorityToUse) )
{
// don't submit the bitmap
return TRUE;
}
// Render the active screen
m_pGfx->BeginDraw();
m_pGfx->ClearScreen();
m_pActivePage->OnDraw(*m_pGfx);
m_pGfx->EndDraw();
// Get the active bitmap
lgLcdBitmap* pBitmap = m_pGfx->GetLCDScreen();
// Only submit if the bitmap needs to be updated
// (If the priority or bitmap have changed)
DWORD res = ERROR_SUCCESS;
if (DoesBitmapNeedUpdate(pBitmap))
{
res = lgLcdUpdateBitmap(m_hDevice, &pBitmap->bmp_mono.hdr, dwPriorityToUse);
HandleErrorFromAPI(res);
}
return (LGLCD_INVALID_DEVICE != m_hDevice);
}
HRESULT CLCDOutput::Draw()
{
DWORD dwPriorityToUse = LGLCD_ASYNC_UPDATE(m_nPriority);
if ( (NULL == m_pActiveScreen) ||
(LGLCD_INVALID_DEVICE == m_hDevice) ||
(LGLCD_PRIORITY_IDLE_NO_SHOW == dwPriorityToUse) )
{
// don't submit the bitmap
return S_OK;
}
// Render the active screen
m_pActiveScreen->Draw();
// Get the active bitmap
lgLcdBitmap160x43x1* pScreen = m_pActiveScreen->GetLCDScreen();
// Only submit if the bitmap needs to be updated
// (If the priority or bitmap have changed)
DWORD res = ERROR_SUCCESS;
if (DoesBitmapNeedUpdate(pScreen))
{
res = lgLcdUpdateBitmap(m_hDevice, &pScreen->hdr, dwPriorityToUse);
HandleErrorFromAPI(res);
}
// read the soft buttons
ReadButtons();
return S_OK;
}
