假设我们要使用CoreGraphics和CoreFoundation捕获屏幕并获取图像数据：
package main// To use the two libraries we need to define the respective flags, include the required header files and import "C" immediately afterimport ( // #cgo LDFLAGS: -framework CoreGraphics // #cgo LDFLAGS: -framework CoreFoundation // #include <CoreGraphics/CoreGraphics.h> // #include <CoreFoundation/CoreFoundation.h> "C" "image" "reflect" "unsafe" // other packages...)func main() { displayID := C.CGMainDisplayID() width := int(C.CGDisplayPixelsWide(displayID)) height := int(C.CGDisplayPixelsHigh(displayID)) rawdata:= C.CGDataProviderCopyData(C.CGImageGetDataProvider(C.CGDisplayCreateImage(displayID))) length := int(C.CFDataGetLength(rawData)) ptr := unsafe.Pointer(C.CFDataGetBytePtr(rawData)) var slice []byte hdrp := (*reflect.SliceHeader)(unsafe.Pointer(&slice)) hdrp.Data = uintptr(ptr) hdrp.Len = length hdrp.Cap = length imageBytes := make([]byte, length) for i := 0; i < length; i += 4 { imageBytes[i], imageBytes[i+2], imageBytes[i+1], imageBytes[i+3] = slice[i+2], slice[i], slice[i+1], slice[i+3] } C.CFRelease(rawData) img := &image.RGBA{Pix: imageBytes, Stride: 4 * width, Rect: image.Rect(0, 0, width, height)} // There we go, we can now save or process the image further }
