Hello libart-paperback

2025-09-04 01:50:53 +02:00
commit f09d1d885c
100 changed files with 16611 additions and 0 deletions
--- a/examples/basics/example.cxx
+++ b/examples/basics/example.cxx
@@ -0,0 +1,102 @@
+#include <fstream>
+#include <iostream>
+
+#include <art/paperback/document.hxx>
+#include <art/paperback/document-information.hxx>
+#include <art/paperback/page.hxx>
+
+#include <art/paperback/graphics/canvas.hxx>
+#include <art/paperback/graphics/standard-font.hxx>
+
+using namespace std;
+using namespace Art::Paperback;
+using namespace Art::Paperback::Graphics;
+
+int
+main(int argc, char* argv[])
+{
+  if (argc != 2) {
+    cerr << "usage: " << argv[0] << " <path>\n";
+    return 1;
+  }
+
+  try {
+    fstream fs{argv[1], ios_base::out | ios_base::binary};
+
+    // Create a new document.
+    //
+    Document document{Document::create_new, fs, 1, 4};
+    document.information().set_title("Example Document");
+    document.information().set_author("Example Author");
+    document.information().set_subject("Example Subject");
+    document.information().set_keywords("PDF for C++");
+    document.information().set_creator("libart-paperback");
+    document.information().set_producer("libart-paperback");
+
+    // Load one of the 14 standard fonts.
+    //
+    Standard_font font{document, "Helvetica-BoldOblique"};
+
+    double width = 595;
+    double height = 842;
+
+    // Create a new page.
+    //
+    auto& page = document.create_page(Page::Properties{
+      Rectangle{0, 0, width, height}
+    });
+
+    // Create a new canvas and render some text on the page.
+    //
+    Canvas canvas{Canvas::clear, page};
+
+    // Set the font with a size of 14.
+    //
+    Canvas::Set_font use_font{canvas, font, 14};
+
+    // Render some text and graphics.
+    //
+    {
+      // Measure the width of the text, so we can center it.
+      //
+      auto tw = font.get_text_width("Hello, world!");
+
+      auto text_width = (tw.width * 14) / 1000;
+      auto capheight = (font.get_capheight() * 14) / 1000;
+
+      double cx = (width / 2) - (text_width / 2);
+      double cy = (height / 2) - (capheight / 2);
+
+      {
+        Canvas::Begin_text bt{canvas};
+
+        bt.move_text_pos(cx, cy);
+        bt.show_text("Hello, world!");
+      }
+
+      {
+        Canvas::Path path{canvas, Canvas::Path::Paint_mode::stroke};
+
+        // Draw borders around the text.
+        //
+        path.move_to(cx - 10, cy - 10);
+        path.line_to(cx - 10, cy + capheight + 10);
+        path.line_to(cx + text_width + 10, cy + capheight + 10);
+        path.line_to(cx + text_width + 10, cy - 10);
+      }
+    }
+
+    document.flush();
+  }
+  catch (exception const& ex) {
+    cerr << argv[0] << ": error: " << ex.what() << '\n';
+  }
+  catch (int u) {
+    cerr << argv[0] << ": " << u << '\n';
+  }
+  catch (...) {
+    cerr << argv[0] << ": an unknown error occurred\n";
+  }
+
+  return 0;
+}