124 lines
4.6 KiB
C++
124 lines
4.6 KiB
C++
#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 *Motivate(string *type, char *BufferData, size_t BufferLength,
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ArgumentMap Arguments, size_t *DataSize) {
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string top_text = GetArgument<string>(Arguments, "top");
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string bottom_text = 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()) in = in.bandjoin(255);
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int width = in.width();
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int size = width / 5;
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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 textWidth = width - ((width / 25) * 2);
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string font_string =
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(font == "roboto" ? "Roboto Condensed" : font) + ", Twemoji Color Font";
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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 topImage;
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if (top_text != "") {
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string topText = "<span foreground=\"white\" background=\"black\">" +
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top_text + "</span>";
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topImage = VImage::text(
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topText.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 + " " + to_string(size)).c_str())
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->set("fontfile", (basePath + "assets/fonts/twemoji.otf").c_str())
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->set("width", textWidth));
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}
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VImage bottomImage;
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if (bottom_text != "") {
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string bottomText = "<span foreground=\"white\" background=\"black\">" +
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bottom_text + "</span>";
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bottomImage = VImage::text(
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bottomText.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 + " " + to_string(size * 0.4)).c_str())
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->set("fontfile", (basePath + "assets/fonts/twemoji.otf").c_str())
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->set("width", textWidth));
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}
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vector<VImage> img;
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int height;
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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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int borderSize = max(2, width / 66);
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int borderSize2 = borderSize * 0.5;
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VImage bordered =
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img_frame.embed(borderSize, borderSize, width + (borderSize * 2),
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pageHeight + (borderSize * 2),
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VImage::option()->set("extend", "black"));
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VImage bordered2 = bordered.embed(borderSize2, borderSize2,
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bordered.width() + (borderSize2 * 2),
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bordered.height() + (borderSize2 * 2),
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VImage::option()->set("extend", "white"));
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int addition = width / 8;
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int sideAddition = pageHeight * 0.4;
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VImage bordered3 = bordered2.embed(
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sideAddition / 2, addition / 2, bordered2.width() + sideAddition,
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bordered2.height() + addition,
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VImage::option()->set("extend", "black"));
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VImage frame;
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if (top_text != "") {
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frame = bordered3.join(
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topImage.gravity(VIPS_COMPASS_DIRECTION_NORTH, bordered3.width(),
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topImage.height() + (size / 4),
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VImage::option()->set("extend", "black")),
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VIPS_DIRECTION_VERTICAL,
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VImage::option()->set("background", 0x000000)->set("expand", true));
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}
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if (bottom_text != "") {
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if (top_text == "") frame = bordered3;
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frame = frame.join(
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bottomImage.gravity(VIPS_COMPASS_DIRECTION_NORTH, bordered3.width(),
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bottomImage.height() + (size / 4),
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VImage::option()->set("extend", "black")),
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VIPS_DIRECTION_VERTICAL,
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VImage::option()->set("background", 0x000000)->set("expand", true));
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}
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height = frame.height();
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img.push_back(frame);
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}
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VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1))
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.extract_band(0, VImage::option()->set("n", 3));
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final.set(VIPS_META_PAGE_HEIGHT, height);
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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", 1) : 0);
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return (char *)buf;
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}
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