mrmBot-Matrix/natives/spin.cc

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#include <Magick++.h>
#include <cstring>
#include <iostream>
#include <list>
#include "common.h"
using namespace std;
using namespace Magick;
ArgumentMap Spin(string type, string *outType, char *BufferData, size_t BufferLength,
[[maybe_unused]] ArgumentMap Arguments, size_t *DataSize) {
int delay = GetArgumentWithFallback<int>(Arguments, "delay", 0);
Blob blob;
list<Image> frames;
list<Image> coalesced;
list<Image> mid;
try {
readImages(&frames, Blob(BufferData, BufferLength));
} catch (Magick::WarningCoder &warning) {
cerr << "Coder Warning: " << warning.what() << endl;
} catch (Magick::Warning &warning) {
cerr << "Warning: " << warning.what() << endl;
}
coalesceImages(&coalesced, frames.begin(), frames.end());
if (type != "gif") {
list<Image>::iterator it = coalesced.begin();
for (int i = 0; i < 29; ++i) {
coalesced.push_back(*it);
}
}
int i = 0;
for (Image &image : coalesced) {
image.virtualPixelMethod(Magick::TransparentVirtualPixelMethod);
image.scale(Geometry("256x256"));
image.alphaChannel(Magick::SetAlphaChannel);
double rotation[1] = {(double)360 * i / coalesced.size()};
image.distort(Magick::ScaleRotateTranslateDistortion, 1, rotation);
image.magick("GIF");
mid.push_back(image);
i++;
}
for_each(mid.begin(), mid.end(),
gifDisposeMethodImage(Magick::BackgroundDispose));
optimizeTransparency(mid.begin(), mid.end());
if (delay != 0) {
for_each(mid.begin(), mid.end(), animationDelayImage(delay));
} else if (type != "gif") {
for_each(mid.begin(), mid.end(), animationDelayImage(5));
}
for (Image &image : mid) {
image.quantizeDitherMethod(FloydSteinbergDitherMethod);
image.quantize();
}
writeImages(mid.begin(), mid.end(), &blob);
*outType = "gif";
*DataSize = blob.length();
char *data = (char *)malloc(*DataSize);
memcpy(data, blob.data(), *DataSize);
ArgumentMap output;
output["buf"] = data;
output["width"] = (int)mid.front().columns();
output["height"] = (int)mid.front().rows();
return output;
}