// Opens the input-device. Parameters (e.g. the device-name) can be given in 'param'.
// Returns true if the input-device was opened successfully.
ATMO_BOOL CAtmoGdiDisplayCaptureInput::Open() {
CAtmoConfig *pAtmoConfig = m_pAtmoDynData->getAtmoConfig();
CAtmoDisplays *pAtmoDisplays = m_pAtmoDynData->getAtmoDisplays();
m_rowsPerFrame = pAtmoConfig->getLiveView_RowsPerFrame();
if(m_rowsPerFrame < 1) m_rowsPerFrame = 1;
if(m_rowsPerFrame >= CAP_HEIGHT) m_rowsPerFrame = CAP_HEIGHT - 1;
m_CurrentFrame = 0; // halbbild counter
// clear temp hsv image
memset(&HSV_Img, 0, IMAGE_SIZE * sizeof(tHSVColor) );
#ifndef UseGdiDesktopGetPixel
// setup handles and stuff for screen copy ...
m_hdcScreen = GetDC(NULL);
// used as device context for temporary screenshot bitmap
m_hTempBitmapDC = CreateCompatibleDC(m_hdcScreen);
#endif
int displayNr = pAtmoConfig->getLiveView_DisplayNr();
if(displayNr >= pAtmoDisplays->getCount())
displayNr = 0; // drop back to display 0 ;-)
TAtmoDisplayInfo dislayInfo = pAtmoDisplays->getDisplayInfo(displayNr);
// here TODO insert Screen! - in the config we have the display number to use
// get resolution of this display and its position in the world of the current
// windows desktop device context....!!! todo!
m_ScreenSourceRect.left = dislayInfo.horz_ScreenPos + pAtmoConfig->getLiveView_HOverscanBorder();
m_ScreenSourceRect.top = dislayInfo.vert_ScreenPos + pAtmoConfig->getLiveView_VOverscanBorder();
m_ScreenSourceRect.right = m_ScreenSourceRect.left + dislayInfo.horz_res - (2 * pAtmoConfig->getLiveView_HOverscanBorder());
m_ScreenSourceRect.bottom = m_ScreenSourceRect.top + dislayInfo.vert_res - (2 * pAtmoConfig->getLiveView_VOverscanBorder());
// calculate lShift and tShift?
/*
for what?
ok ... lets do some basics... our temp picutre has 64 columns?
our source (my desktop) is 1600 columns wide?
... so i Have to grab every 64th Pixel?
a simple calculation would result into
destination column 0: --> source column 0
destincation column 63: --> source column 1575 ... so we will lose 25 pixel to the right?
so m_lShift is the value we have to move the "Grab Raster to right" so that
destination column 0: --> source column 12
destincation column 63: --> source column 1587 ... so we will lose 12 pixel to the right and 12 to the left.. a nice small ignored Border around...
that same happens to the row position...
*/
// precalculate Pixel Coordinates for Capture to save some cpu time?
int capture_area_width = m_ScreenSourceRect.right - m_ScreenSourceRect.left;
int capture_area_height = m_ScreenSourceRect.bottom - m_ScreenSourceRect.top;
for(int y=1;y<=CAP_HEIGHT;y++) {
m_iSrcRows[y-1] = ((y * capture_area_height) / (CAP_HEIGHT+1) );
}
for(int x=1;x<=CAP_WIDTH;x++) {
m_iSrcCols[x-1] = ((x * capture_area_width) / (CAP_WIDTH+1) );
}
// 25.09.2007 Igor: + m_ScreenSourceRect.left +m_ScreenSourceRect.top --> ist falsch
// weil die Koordinaten in m_iSrcCols und m_iSrcRows - beziehen sich ja schon auf die mittels m_ScreenSourceRect erzeugte
// Kopie des Desktops Device Contexts ... thanks to MacGyver for debugging.
#ifndef UseGdiGetPixel
// should be enough memory for one row of pixels! in each Color Depth?
m_PixelBuffer = (unsigned char *)malloc((capture_area_width+1) * 4);
#endif
// run this thread
this->Run();
return true;
}
