54 lines
No EOL
1.7 KiB
C++
54 lines
No EOL
1.7 KiB
C++
#include <vips/vips8>
|
|
|
|
#include "common.h"
|
|
|
|
using namespace std;
|
|
using namespace vips;
|
|
|
|
ArgumentMap Flag(string type, string *outType, char *BufferData, size_t BufferLength,
|
|
ArgumentMap Arguments, size_t *DataSize) {
|
|
string overlay = GetArgument<string>(Arguments, "overlay");
|
|
string basePath = GetArgument<string>(Arguments, "basePath");
|
|
|
|
VOption *options = VImage::option()->set("access", "sequential");
|
|
|
|
VImage in =
|
|
VImage::new_from_buffer(BufferData, BufferLength, "",
|
|
type == "gif" ? options->set("n", -1) : options)
|
|
.colourspace(VIPS_INTERPRETATION_sRGB);
|
|
|
|
if (!in.has_alpha()) in = in.bandjoin(255);
|
|
|
|
int width = in.width();
|
|
int pageHeight = vips_image_get_page_height(in.get_image());
|
|
int nPages = vips_image_get_n_pages(in.get_image());
|
|
|
|
string assetPath = basePath + overlay;
|
|
VImage overlayInput = VImage::new_from_file(assetPath.c_str());
|
|
VImage overlayImage = overlayInput.resize(
|
|
(double)width / (double)overlayInput.width(),
|
|
VImage::option()->set(
|
|
"vscale", (double)pageHeight / (double)overlayInput.height()));
|
|
if (!overlayImage.has_alpha()) {
|
|
overlayImage = overlayImage.bandjoin(127);
|
|
} else {
|
|
// this is a pretty cool line, just saying
|
|
overlayImage = overlayImage * vector<double>{1, 1, 1, 0.5};
|
|
}
|
|
VImage replicated = overlayImage.replicate(1, nPages);
|
|
VImage final = in.composite2(replicated, VIPS_BLEND_MODE_OVER);
|
|
|
|
void *buf;
|
|
final.write_to_buffer(
|
|
("." + *outType).c_str(), &buf, DataSize,
|
|
*outType == "gif"
|
|
? VImage::option()->set("dither", 0)->set("reoptimise", 1)
|
|
: 0);
|
|
|
|
ArgumentMap output;
|
|
output["buf"] = (char *)buf;
|
|
output["width"] = width;
|
|
output["height"] = pageHeight;
|
|
|
|
return output;
|
|
} |