99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
// STL includes
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#include <cassert>
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#include <iostream>
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// Local includes
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#include <grabber/OsxFrameGrabber.h>
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OsxFrameGrabber::OsxFrameGrabber(unsigned display, unsigned width, unsigned height)
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: Grabber("OSXGRABBER", width, height)
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, _screenIndex(100)
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{
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// check if display is available
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setDisplayIndex(display);
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}
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OsxFrameGrabber::~OsxFrameGrabber()
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{
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}
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int OsxFrameGrabber::grabFrame(Image<ColorRgb> & image)
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{
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if (!_enabled) return 0;
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CGImageRef dispImage;
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CFDataRef imgData;
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unsigned char * pImgData;
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unsigned dspWidth, dspHeight;
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dispImage = CGDisplayCreateImage(_display);
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// display lost, use main
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if (dispImage == NULL && _display)
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{
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dispImage = CGDisplayCreateImage(kCGDirectMainDisplay);
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// no displays connected, return
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if (dispImage == NULL)
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{
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Error(_log, "No display connected...");
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return -1;
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}
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}
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imgData = CGDataProviderCopyData(CGImageGetDataProvider(dispImage));
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pImgData = (unsigned char*) CFDataGetBytePtr(imgData);
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dspWidth = CGImageGetWidth(dispImage);
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dspHeight = CGImageGetHeight(dispImage);
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_imageResampler.setHorizontalPixelDecimation(dspWidth/_width);
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_imageResampler.setVerticalPixelDecimation(dspHeight/_height);
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_imageResampler.processImage( pImgData,
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dspWidth,
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dspHeight,
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CGImageGetBytesPerRow(dispImage),
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PixelFormat::BGR32,
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image);
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CFRelease(imgData);
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CGImageRelease(dispImage);
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return 0;
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}
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void OsxFrameGrabber::setDisplayIndex(int index)
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{
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if(_screenIndex != index)
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{
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_screenIndex = index;
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CGImageRef image;
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CGDisplayCount displayCount;
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CGDirectDisplayID displays[8];
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// get list of displays
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CGGetActiveDisplayList(8, displays, &displayCount);
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if (_screenIndex + 1 > displayCount)
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{
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Error(_log, "Display with index %d is not available. Using main display", _screenIndex);
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_display = kCGDirectMainDisplay;
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}
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else
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{
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_display = displays[_screenIndex];
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}
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image = CGDisplayCreateImage(_display);
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if(image == NULL)
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{
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Error(_log, "Failed to open main display, disable capture interface");
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setEnabled(false);
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return;
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}
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else
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setEnabled(true);
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Info(_log, "Display opened with resolution: %dx%d@%dbit", CGImageGetWidth(image), CGImageGetHeight(image), CGImageGetBitsPerPixel(image));
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CGImageRelease(image);
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}
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}
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