feat: add painter

src/bind.cpp

@@ -100,10 +100,13 @@ EMSCRIPTEN_BINDINGS(PODOFO)
         .function("createPage", createPage, em::allow_raw_pointers())
     ;
 
-    em::class_<PoDoFo::PdfPage>("Page")
+    em::class_<PoDoFo::PdfPage, em::base<PoDoFo::PdfCanvas>>("Page")
         .function("getRect", &getRect)    
     ;
 
+    em::class_<PoDoFo::PdfCanvas>("Canvas")
+    ;
+
     em::class_<PoDoFo::PdfMemDocument>("Document")
         .constructor()
         .function("loadFromBuffer", &loadFromBuffer)
@@ -118,6 +121,21 @@ EMSCRIPTEN_BINDINGS(PODOFO)
         .function("resetTitle", &resetTitle)
     ;
 
+    em::class_<PoDoFo::PdfPainter>("Painter")
+        .constructor()
+        .function("setCanvas", &PoDoFo::PdfPainter::SetCanvas)
+        .function("drawCircle", &PoDoFo::PdfPainter::DrawCircle)
+        .function("finishDrawing", &PoDoFo::PdfPainter::FinishDrawing)
+    ;
+
+    em::enum_<PoDoFo::PdfPathDrawMode>("PathDrawMode")
+        .value("Stroke", PoDoFo::PdfPathDrawMode::Stroke)
+        .value("Fill", PoDoFo::PdfPathDrawMode::Fill)
+        .value("StrokeFill", PoDoFo::PdfPathDrawMode::StrokeFill)
+        .value("FillEvenOdd", PoDoFo::PdfPathDrawMode::FillEvenOdd)
+        .value("StrokeFillEvenOdd", PoDoFo::PdfPathDrawMode::StrokeFillEvenOdd)   
+    ;
+
     em::function("makeBuffer", &makeBuffer);
     em::function("getPageSize", &getPageSize);
 

tests/unit_tests/painter.test.js

@@ -0,0 +1,16 @@
+describe('podofo.js', () => {
+    it('simple paint', async () => {
+        const Podofo = global.Podofo;
+
+        const document = new Podofo.Document();
+        const size = Podofo.getPageSize(Podofo.PageSize.A4, false);
+        const page = document.getPages()
+                             .createPage(size);
+
+
+        const painter = new Podofo.Painter();
+        painter.setCanvas(page);
+        painter.drawCircle(100, 500, 20, Podofo.PathDrawMode.Fill);
+        painter.finishDrawing();
+    });
+});

tests/unit_tests/utils.js

@@ -0,0 +1,9 @@
+const fs = require('fs');
+const path = require('path');
+
+const writeToFile = (buffer, name) => {
+    const filePath = path.join(__dirname, name);
+    fs.writeFileSync(filePath, buffer);
+}
+
+module.exports = { writeToFile };