Basic Font integration.

src/visual_elements/TextNode.cpp

@@ -1,5 +1,10 @@
 #include "TextNode.h"
 
+#include "Rectangle.h"
+#include "FontsManager.h"
+#include "IFontEngine.h"
+#include "MeshPrimitives.h"
+
 #include "Color.h"
 
 TextNode::TextNode(const std::string& content, const DiscretePoint& loc)
@@ -55,3 +60,39 @@ void TextNode::setStrokeColor(const Color& color)
 {
     mStrokeColor = color;
 }
+
+void TextNode::update(FontsManager* drawingManager)
+{
+    updateMesh();
+    updateTexture(drawingManager);
+}
+
+void TextNode::updateMesh()
+{
+    double font_height = 16;
+    double font_width = 16;
+
+    double text_width = mContent.size() * font_width;
+
+    const auto rect = Rectangle(mLocation, text_width, font_height);
+
+    auto mesh = MeshPrimitives::build(rect);
+    auto color = Color(0, 0, 0, 1.0);
+
+    mesh->addConstantFaceVectorAttribute("Color", color.getAsVectorDouble());
+    mMesh = std::move(mesh);
+}
+
+void TextNode::updateTexture(FontsManager* fontsManager)
+{
+    fontsManager->getFontEngine()->loadFontFace("truetype/msttcorefonts/arial.ttf");
+    auto glyph = fontsManager->getFontEngine()->loadGlyph('A');
+
+    if (!glyph)
+    {
+        return;
+    }
+
+    mTexture = std::make_unique<Image<unsigned char> >(glyph->getWidth(), glyph->getHeight());
+    mTexture->setData(glyph->getData());
+}