Implement function to set macOS dock icon
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src/_cocoalayer.mm
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20
src/_cocoalayer.mm
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#if defined(__APPLE__)
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#import <Cocoa/Cocoa.h>
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#import <objc/runtime.h>
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#include "_cocoalayer.h"
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// Example: make a global function you can call
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extern "C" void _cocoasetdockicon(unsigned char* data, int width, int height)
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{
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NSImage *dockIcon = [[NSImage alloc] initWithSize:NSMakeSize(width, height)];
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CGDataProviderRef provider = CGDataProviderCreateWithData(nullptr, data, width*height*4, nullptr);
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CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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CGImageRef cgImage = CGImageCreate(width, height, 8, 32, width*4, colorSpace,
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kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big,
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provider, nullptr, false, kCGRenderingIntentDefault);
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[dockIcon addRepresentation:[[NSBitmapImageRep alloc] initWithCGImage:cgImage]];
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[NSApp setApplicationIconImage:dockIcon];
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CGImageRelease(cgImage);
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CGColorSpaceRelease(colorSpace);
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CGDataProviderRelease(provider);
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}
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#endif
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