59 lines
No EOL
1.8 KiB
C++
59 lines
No EOL
1.8 KiB
C++
#include <algorithm>
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#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 *Reverse(string type, string *outType, char *BufferData,
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size_t BufferLength, ArgumentMap Arguments, size_t *DataSize) {
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bool soos = GetArgumentWithFallback<bool>(Arguments, "soos", false);
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VOption *options =
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VImage::option()->set("access", "sequential")->set("n", -1);
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VImage in = VImage::new_from_buffer(BufferData, BufferLength, "", options)
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.colourspace(VIPS_INTERPRETATION_sRGB);
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int width = in.width();
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int pageHeight = vips_image_get_page_height(in.get_image());
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int nPages = vips_image_get_n_pages(in.get_image());
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vector<VImage> split;
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// todo: find a better way of getting individual frames (or at least getting
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// the frames in reverse order)
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for (int i = 0; i < nPages; i++) {
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VImage img_frame = in.crop(0, i * pageHeight, width, pageHeight);
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split.push_back(img_frame);
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}
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vector<int> delays = in.get_array_int("delay");
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if (soos) {
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vector<VImage> copy = split;
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vector<int> copy2 = delays;
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reverse(copy.begin(), copy.end());
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reverse(copy2.begin(), copy2.end());
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copy.pop_back();
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copy2.pop_back();
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copy.erase(copy.begin());
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copy2.erase(copy2.begin());
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split.insert(split.end(), copy.begin(), copy.end());
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delays.insert(delays.end(), copy2.begin(), copy2.end());
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} else {
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reverse(split.begin(), split.end());
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reverse(delays.begin(), delays.end());
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}
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VImage final = VImage::arrayjoin(split, VImage::option()->set("across", 1));
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final.set(VIPS_META_PAGE_HEIGHT, pageHeight);
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final.set("delay", delays);
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void *buf;
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final.write_to_buffer(".gif", &buf, DataSize,
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VImage::option()->set("dither", 0));
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*outType = "gif";
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return (char *)buf;
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} |