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我需要捕获移动窗口。由于窗口正在我想捕捉它在主线程:发送CGImageRef作为输出参数
void MacRenderer::captureImageImpl(const CGRect& captureRect, const CGWindowID windowId, CGImageRef* img)
{
*img = CGWindowListCreateImage(captureRect, kCGWindowListOptionIncludingWindow, windowId, kCGWindowImageBoundsIgnoreFraming); //EXC_BAD_ACCESS
}
void MacRenderer::captureWindow(CGWindowID windowId, unsigned char** bgraData, int* width, int* height, int* bytesPerRow, NSRect captureRect)
{
CGImageRef* windowImage;
dispatch_sync(dispatch_get_main_queue(), ^{
captureImageImpl(captureCGRect, windowId, windowImage);
});
//Use windowImage ...
}
我对img
地址越来越EXC_BAD_ACCESS
。为什么和什么是解决方案?谢谢!