mrmBot-Matrix/natives/colors.cc

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#include <map>
#include <string>
#include <vips/vips8>
#include "common.h"
using namespace std;
using namespace vips;
VImage sepia = VImage::new_matrixv(3, 3, 0.3588, 0.7044, 0.1368, 0.2990, 0.5870,
0.1140, 0.2392, 0.4696, 0.0912);
ArgumentMap Colors(string type, string *outType, char *BufferData,
size_t BufferLength, ArgumentMap Arguments, size_t *DataSize) {
string color = GetArgument<string>(Arguments, "color");
VOption *options = VImage::option()->set("access", "sequential");
VImage in =
VImage::new_from_buffer(BufferData, BufferLength, "",
type == "gif" ? options->set("n", -1) : options)
.colourspace(VIPS_INTERPRETATION_sRGB);
VImage out;
if (color == "grayscale") {
out = in.colourspace(VIPS_INTERPRETATION_B_W);
} else if (color == "sepia") {
out = in.extract_band(0, VImage::option()->set("n", 3)).recomb(sepia);
}
void *buf;
out.write_to_buffer(("." + *outType).c_str(), &buf, DataSize);
ArgumentMap output;
output["buf"] = (char *)buf;
output["width"] = out.width();
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output["height"] = vips_image_get_page_height(out.get_image());
return output;
}