142 lines
5.1 KiB
C++
142 lines
5.1 KiB
C++
#include "common.h"
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#include <vips/vips8>
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using namespace std;
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using namespace vips;
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char *Meme(string type, char *BufferData, size_t BufferLength,
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ArgumentMap Arguments, size_t *DataSize) {
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string top = GetArgument<string>(Arguments, "top");
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string bottom = GetArgument<string>(Arguments, "bottom");
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string font = GetArgument<string>(Arguments, "font");
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string basePath = GetArgument<string>(Arguments, "basePath");
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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())
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in = in.bandjoin(255);
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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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int size = width / 9;
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int dividedWidth = width / 1000;
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int rad = 1;
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vector<double> zeroVec = {0, 0, 0, 0};
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string font_string =
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(font == "roboto" ? "Roboto Condensed" : font) + ", Twemoji Color Font " +
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(font != "impact" ? "bold" : "normal") + " " + to_string(size);
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VImage mask = VImage::black(rad * 2 + 1, rad * 2 + 1) + 128;
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mask.draw_circle({255}, rad, rad, rad, VImage::option()->set("fill", true));
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VImage altMask;
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if (dividedWidth >= 1) {
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altMask = VImage::black(dividedWidth * 2 + 1, dividedWidth * 2 + 1) + 128;
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altMask.draw_circle({255}, dividedWidth, dividedWidth, dividedWidth,
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VImage::option()->set("fill", true));
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}
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auto findResult = fontPaths.find(font);
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if (findResult != fontPaths.end()) {
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VImage::text(".", VImage::option()->set(
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"fontfile", (basePath + findResult->second).c_str()));
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}
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VImage topText;
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if (top != "") {
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VImage topIn = VImage::text(
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("<span foreground=\"white\">" + top + "</span>").c_str(),
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VImage::option()
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->set("rgba", true)
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->set("align", VIPS_ALIGN_CENTRE)
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->set("font", font_string.c_str())
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->set("fontfile", (basePath + "assets/fonts/twemoji.otf").c_str())
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->set("width", width));
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topIn = topIn.embed(rad + 10, rad + 10, (topIn.width() + 2 * rad) + 20,
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(topIn.height() + 2 * rad) + 20);
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VImage topOutline =
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topIn.morph(mask, VIPS_OPERATION_MORPHOLOGY_DILATE)
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.gaussblur(0.5, VImage::option()->set("min_ampl", 0.1));
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if (dividedWidth >= 1) {
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topOutline = topOutline.morph(altMask, VIPS_OPERATION_MORPHOLOGY_DILATE);
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}
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topOutline = (topOutline == zeroVec);
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VImage topInvert = topOutline.extract_band(3).invert();
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topOutline =
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topOutline
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.extract_band(0, VImage::option()->set("n", topOutline.bands() - 1))
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.bandjoin(topInvert);
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topText = topOutline.composite2(topIn, VIPS_BLEND_MODE_OVER);
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}
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VImage bottomText;
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if (bottom != "") {
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VImage bottomIn = VImage::text(
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("<span foreground=\"white\">" + bottom + "</span>").c_str(),
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VImage::option()
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->set("rgba", true)
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->set("align", VIPS_ALIGN_CENTRE)
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->set("font", font_string.c_str())
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->set("fontfile", (basePath + "assets/fonts/twemoji.otf").c_str())
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->set("width", width));
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bottomIn =
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bottomIn.embed(rad + 10, rad + 10, (bottomIn.width() + 2 * rad) + 20,
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(bottomIn.height() + 2 * rad) + 20);
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VImage bottomOutline =
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bottomIn.morph(mask, VIPS_OPERATION_MORPHOLOGY_DILATE)
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.gaussblur(0.5, VImage::option()->set("min_ampl", 0.1));
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if (dividedWidth >= 1) {
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bottomOutline =
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bottomOutline.morph(altMask, VIPS_OPERATION_MORPHOLOGY_DILATE);
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}
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bottomOutline = (bottomOutline == zeroVec);
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VImage bottomInvert = bottomOutline.extract_band(3).invert();
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bottomOutline =
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bottomOutline
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.extract_band(0,
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VImage::option()->set("n", bottomOutline.bands() - 1))
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.bandjoin(bottomInvert);
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bottomText = bottomOutline.composite2(bottomIn, VIPS_BLEND_MODE_OVER);
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}
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vector<VImage> img;
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for (int i = 0; i < nPages; i++) {
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VImage img_frame =
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type == "gif" ? in.crop(0, i * pageHeight, width, pageHeight) : in;
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if (top != "") {
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img_frame = img_frame.composite2(
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topText, VIPS_BLEND_MODE_OVER,
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VImage::option()->set("x", (width / 2) - (topText.width() / 2)));
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}
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if (bottom != "") {
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img_frame = img_frame.composite2(
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bottomText, VIPS_BLEND_MODE_OVER,
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VImage::option()
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->set("x", (width / 2) - (bottomText.width() / 2))
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->set("y", pageHeight - bottomText.height()));
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}
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img.push_back(img_frame);
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}
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VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
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final.set(VIPS_META_PAGE_HEIGHT, pageHeight);
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void *buf;
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final.write_to_buffer(
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("." + type).c_str(), &buf, DataSize,
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type == "gif" ? VImage::option()->set("dither", 0)->set("reoptimise", 1)
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: 0);
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vips_error_clear();
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vips_thread_shutdown();
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return (char *)buf;
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} |