wip: work on font rendering in window rendered by shared object

programs/libs/libhello/src/libhello.cpp

@@ -6,6 +6,7 @@
 */
 
 #include <montauk/syscall.h>
+#include <gui/truetype.hpp>
 
 // Exported demo function - creates a window and renders until closed
 extern "C" int hello_run() {
@@ -20,6 +21,18 @@ extern "C" int hello_run() {
     int width = 200;
     int height = 320;
 
+    gui::TrueTypeFont* font = (gui::TrueTypeFont*)montauk::malloc(sizeof(gui::TrueTypeFont));
+    if (!font) {
+        montauk::win_destroy(winId);
+        return -1;
+    }
+    montauk::memset(font, 0, sizeof(gui::TrueTypeFont));
+    if (!font->init("0:/fonts/Roboto-Medium.ttf")) {
+        montauk::mfree(font);
+        montauk::win_destroy(winId);
+        return -1;
+    }
+
     // Simple render - fill with a color pattern
     for (int y = 0; y < height; y++) {
         for (int x = 0; x < width; x++) {
@@ -28,6 +41,14 @@ extern "C" int hello_run() {
         }
     }
 
+    // Render text using TrueType
+    gui::Color text_color;
+    text_color.r = 0xF5;
+    text_color.g = 0xF5;
+    text_color.b = 0xF5;
+    text_color.a = 255;
+    font->draw_to_buffer(pixels, width, height, 20, 20, "Hello from libhello!", text_color, 16);
+
     // Present the initial frame
     montauk::win_present(winId);
 
@@ -58,10 +79,12 @@ extern "C" int hello_run() {
                     pixels[y * width + x] = 0xFF1a1a2e;
                 }
             }
+            font->draw_to_buffer(pixels, width, height, 20, 20, "Hello from libhello!", text_color, 16);
             montauk::win_present(winId);
         }
     }
 
     montauk::win_destroy(winId);
+    montauk::mfree(font);
     return 0;
 }