48 lines
No EOL
1.6 KiB
C++
48 lines
No EOL
1.6 KiB
C++
#include <map>
|
|
#include <vips/vips8>
|
|
|
|
#include "common.h"
|
|
|
|
using namespace std;
|
|
using namespace vips;
|
|
|
|
char *Flip(string type, string *outType, char *BufferData, size_t BufferLength,
|
|
ArgumentMap Arguments, size_t *DataSize) {
|
|
bool flop = GetArgument<bool>(Arguments, "flop");
|
|
|
|
VImage in = VImage::new_from_buffer(BufferData, BufferLength, "",
|
|
type == "gif"
|
|
? VImage::option()->set("n", -1)->set(
|
|
"access", "sequential")
|
|
: 0)
|
|
.colourspace(VIPS_INTERPRETATION_sRGB);
|
|
if (!in.has_alpha()) in = in.bandjoin(255);
|
|
|
|
VImage out;
|
|
if (flop) {
|
|
out = in.flip(VIPS_DIRECTION_HORIZONTAL);
|
|
} else if (type == "gif") {
|
|
// libvips gif handling is both a blessing and a curse
|
|
vector<VImage> img;
|
|
int pageHeight = vips_image_get_page_height(in.get_image());
|
|
int nPages = vips_image_get_n_pages(in.get_image());
|
|
for (int i = 0; i < nPages; i++) {
|
|
VImage img_frame = in.crop(0, i * pageHeight, in.width(), pageHeight);
|
|
VImage flipped = img_frame.flip(VIPS_DIRECTION_VERTICAL);
|
|
img.push_back(flipped);
|
|
}
|
|
out = VImage::arrayjoin(img, VImage::option()->set("across", 1));
|
|
out.set(VIPS_META_PAGE_HEIGHT, pageHeight);
|
|
} else {
|
|
out = in.flip(VIPS_DIRECTION_VERTICAL);
|
|
}
|
|
|
|
void *buf;
|
|
out.write_to_buffer(
|
|
("." + *outType).c_str(), &buf, DataSize,
|
|
*outType == "gif"
|
|
? VImage::option()->set("dither", 0)->set("reoptimise", 1)
|
|
: 0);
|
|
|
|
return (char *)buf;
|
|
} |