27 lines
811 B
C++
27 lines
811 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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char *Invert(string *type, char *BufferData, size_t BufferLength,
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ArgumentMap Arguments, 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(("." + *type).c_str(), &buf, DataSize);
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return (char *)buf;
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} |