void windowsIcon(iw_context* context, const char* filename) {
//16x16
//32x32
//48x48
//256x256
ByteStream stream;
writeIcoHeader(stream);
writeIconDirEntry(stream, 16, 16, iconHeaderSize + iconDirEntrySize * 4);
writeIconDirEntry(stream, 32, 32, iconHeaderSize + iconDirEntrySize * 4 + getBMPSize(16, 16));
writeIconDirEntry(stream, 48, 48, iconHeaderSize + iconDirEntrySize * 4 + getBMPSize(16, 16) + getBMPSize(32, 32));
writeIconDirEntry(stream, 256, 256, iconHeaderSize + iconDirEntrySize * 4 + getBMPSize(16, 16) + getBMPSize(32, 32) + getBMPSize(48, 48));
scale(context, 16, 16);
iw_image img;
iw_get_output_image(context, &img);
writeBMP(stream, &img);
scale(context, 32, 32);
iw_get_output_image(context, &img);
writeBMP(stream, &img);
scale(context, 48, 48);
iw_get_output_image(context, &img);
writeBMP(stream, &img);
scale(context, 256, 256);
iw_get_output_image(context, &img);
iw_iodescr writedescr;
memset(&writedescr, 0, sizeof(struct iw_iodescr));
writedescr.write_fn = stream_writefn;
writedescr.seek_fn = stream_seekfn;
writedescr.fp = &stream;
iw_write_file_by_fmt(context, &writedescr, IW_FORMAT_PNG);
std::vector<byte> pngSize = convertIntToByteArrayLE(static_cast<int>(stream.size()) - (iconHeaderSize + iconDirEntrySize * 4 + getBMPSize(16, 16) + getBMPSize(32, 32) + getBMPSize(48, 48)));
for (int i = 0; i < 4; ++i) stream.set(i + iconHeaderSize + iconDirEntrySize * 3 + 8, pngSize[i]);
stream.save(filename);
}
// setClipboardDIB(bmp)
static void setClipboardDIB(BITMAPINFO* src)
{
size_t nbytes = getBMPSize(src);
HANDLE data = GlobalAlloc(GHND, nbytes);
if (data != NULL) {
LPVOID dst = GlobalLock(data);
if (dst != NULL) {
CopyMemory(dst, src, nbytes);
GlobalUnlock(data);
SetClipboardData(CF_DIB, data);
data = NULL;
}
if (data != NULL) {
GlobalFree(data);
}
}
}