Take screenshot

debug.html

@@ -42,6 +42,7 @@
         <input type="button" value="Get floppy image" id="get_floppy">
         <input type="button" value="Lock mouse" id="lock_mouse">
         <input type="button" value="Go fullscreen" id="fullscreen">
+        <input type="button" value="Take screenshot (only graphic modes)" id="take_screenshot">
 
         Scale: 
         <input type="number" min="0.25" step="0.25" value="1.0" id="scale" style="width: 50px">

index.html

@@ -32,6 +32,7 @@
         <input type="button" value="Get modified floppy image" id="get_floppy">
         <input type="button" value="Lock mouse" id="lock_mouse">
         <input type="button" value="Go fullscreen" id="fullscreen">
+        <input type="button" value="Take screenshot (only graphic modes)" id="take_screenshot">
 
         Scale: 
         <input type="number" min="0.25" step="0.25" value="1.0" id="scale" style="width: 50px">

src/browser/main.js

@@ -661,6 +661,11 @@ function dump_file(ab, name)
             lock_mouse(elem);
         };
 
+        $("take_screenshot").onclick = function()
+        {
+            screen_adapter.make_screenshot();
+        };
+
         settings.screen_adapter = screen_adapter;
         settings.keyboard_adapter = new KeyboardAdapter();
         settings.mouse_adapter = new MouseAdapter();

src/browser/screen.js

@@ -99,6 +99,14 @@ function ScreenAdapter()
 
     graphic_screen.style.display = "none";
 
+    this.make_screenshot = function()
+    {
+        try {
+            window.open(graphic_screen.toDataURL());
+        }
+        catch(e) {}
+    };
+
     this.put_char = function(row, col, chr, bg_color, fg_color)
     {
         changed_rows[row] = 1;