33 lines
1013 B
C++
33 lines
1013 B
C++
#include <vips/vips8>
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#include "common.h"
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using namespace std;
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using namespace vips;
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ArgumentMap Invert(string type, string *outType, char *BufferData,
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size_t BufferLength, [[maybe_unused]] ArgumentMap Arguments,
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size_t *DataSize) {
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VOption *options = VImage::option()->set("access", "sequential");
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VImage in =
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VImage::new_from_buffer(BufferData, BufferLength, "",
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type == "gif" ? options->set("n", -1) : options)
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.colourspace(VIPS_INTERPRETATION_sRGB);
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if (!in.has_alpha()) in = in.bandjoin(255);
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VImage noAlpha =
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in.extract_band(0, VImage::option()->set("n", in.bands() - 1));
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VImage inverted = noAlpha.invert();
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VImage out = inverted.bandjoin(in.extract_band(3));
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void *buf;
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out.write_to_buffer(("." + *outType).c_str(), &buf, DataSize);
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ArgumentMap output;
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output["buf"] = (char *)buf;
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output["width"] = out.width();
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output["height"] = vips_image_get_page_height(out.get_image());
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return output;
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} |