64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#include <algorithm>
|
|
#include <vips/vips8>
|
|
|
|
#include "common.h"
|
|
|
|
using namespace std;
|
|
using namespace vips;
|
|
|
|
ArgumentMap Reverse(string type, string *outType, char *BufferData,
|
|
size_t BufferLength, ArgumentMap Arguments, size_t *DataSize) {
|
|
bool soos = GetArgumentWithFallback<bool>(Arguments, "soos", false);
|
|
|
|
VOption *options =
|
|
VImage::option()->set("access", "sequential")->set("n", -1);
|
|
|
|
VImage in = VImage::new_from_buffer(BufferData, BufferLength, "", options)
|
|
.colourspace(VIPS_INTERPRETATION_sRGB);
|
|
|
|
int width = in.width();
|
|
int pageHeight = vips_image_get_page_height(in.get_image());
|
|
int nPages = vips_image_get_n_pages(in.get_image());
|
|
|
|
vector<VImage> split;
|
|
// todo: find a better way of getting individual frames (or at least getting
|
|
// the frames in reverse order)
|
|
for (int i = 0; i < nPages; i++) {
|
|
VImage img_frame = in.crop(0, i * pageHeight, width, pageHeight);
|
|
split.push_back(img_frame);
|
|
}
|
|
|
|
vector<int> delays = in.get_array_int("delay");
|
|
if (soos) {
|
|
vector<VImage> copy = split;
|
|
vector<int> copy2 = delays;
|
|
reverse(copy.begin(), copy.end());
|
|
reverse(copy2.begin(), copy2.end());
|
|
copy.pop_back();
|
|
copy2.pop_back();
|
|
copy.erase(copy.begin());
|
|
copy2.erase(copy2.begin());
|
|
split.insert(split.end(), copy.begin(), copy.end());
|
|
delays.insert(delays.end(), copy2.begin(), copy2.end());
|
|
} else {
|
|
reverse(split.begin(), split.end());
|
|
reverse(delays.begin(), delays.end());
|
|
}
|
|
|
|
VImage final = VImage::arrayjoin(split, VImage::option()->set("across", 1));
|
|
final.set(VIPS_META_PAGE_HEIGHT, pageHeight);
|
|
final.set("delay", delays);
|
|
|
|
void *buf;
|
|
final.write_to_buffer(".gif", &buf, DataSize,
|
|
VImage::option()->set("dither", 0));
|
|
|
|
*outType = "gif";
|
|
|
|
ArgumentMap output;
|
|
output["buf"] = (char *)buf;
|
|
output["width"] = width;
|
|
output["height"] = pageHeight;
|
|
|
|
return output;
|
|
} |