3 files changed, 44 insertions, 35 deletions

diff --git a/platform/javascript/js/engine/engine.js b/platform/javascript/js/engine/engine.js
index 01232cbece..321221323c 100644
--- a/platform/javascript/js/engine/engine.js
+++ b/platform/javascript/js/engine/engine.js
@@ -107,17 +107,6 @@ const Engine = (function () {
 				me.canvas.tabIndex = 0;
 			}
 
-			// Disable right-click context menu.
-			me.canvas.addEventListener('contextmenu', function (ev) {
-				ev.preventDefault();
-			}, false);
-
-			// Until context restoration is implemented warn the user of context loss.
-			me.canvas.addEventListener('webglcontextlost', function (ev) {
-				alert('WebGL context lost, please reload the page'); // eslint-disable-line no-alert
-				ev.preventDefault();
-			}, false);
-
 			// Browser locale, or custom one if defined.
 			let locale = me.customLocale;
 			if (!locale) {
diff --git a/platform/javascript/js/libs/library_godot_display.js b/platform/javascript/js/libs/library_godot_display.js
index 2977b7c122..9ec295b39f 100644
--- a/platform/javascript/js/libs/library_godot_display.js
+++ b/platform/javascript/js/libs/library_godot_display.js
@@ -405,6 +405,27 @@ const GodotDisplay = {
 	$GodotDisplay__deps: ['$GodotConfig', '$GodotRuntime', '$GodotDisplayCursor', '$GodotDisplayListeners', '$GodotDisplayDragDrop', '$GodotDisplayGamepads'],
 	$GodotDisplay: {
 		window_icon: '',
+		findDPI: function () {
+			function testDPI(dpi) {
+				return window.matchMedia(`(max-resolution: ${dpi}dpi)`).matches;
+			}
+			function bisect(low, high, func) {
+				const mid = parseInt(((high - low) / 2) + low, 10);
+				if (high - low <= 1) {
+					return func(high) ? high : low;
+				}
+				if (func(mid)) {
+					return bisect(low, mid, func);
+				}
+				return bisect(mid, high, func);
+			}
+			try {
+				const dpi = bisect(0, 800, testDPI);
+				return dpi >= 96 ? dpi : 96;
+			} catch (e) {
+				return 96;
+			}
+		},
 	},
 
 	godot_js_display_is_swap_ok_cancel__sig: 'i',
@@ -422,6 +443,11 @@ const GodotDisplay = {
 		window.alert(GodotRuntime.parseString(p_text)); // eslint-disable-line no-alert
 	},
 
+	godot_js_display_screen_dpi_get__sig: 'i',
+	godot_js_display_screen_dpi_get: function () {
+		return GodotDisplay.findDPI();
+	},
+
 	godot_js_display_pixel_ratio_get__sig: 'f',
 	godot_js_display_pixel_ratio_get: function () {
 		return window.devicePixelRatio || 1;
@@ -619,6 +645,18 @@ const GodotDisplay = {
 		GodotDisplayListeners.add(canvas, 'drop', GodotDisplayDragDrop.handler(dropFiles));
 	},
 
+	godot_js_display_setup_canvas__sig: 'v',
+	godot_js_display_setup_canvas: function () {
+		const canvas = GodotConfig.canvas;
+		GodotDisplayListeners.add(canvas, 'contextmenu', function (ev) {
+			ev.preventDefault();
+		}, false);
+		GodotDisplayListeners.add(canvas, 'webglcontextlost', function (ev) {
+			alert('WebGL context lost, please reload the page'); // eslint-disable-line no-alert
+			ev.preventDefault();
+		}, false);
+	},
+
 	/*
 	 * Gamepads
 	 */
diff --git a/platform/javascript/js/libs/library_godot_http_request.js b/platform/javascript/js/libs/library_godot_http_request.js
index 930d3209f8..7dc2a2df29 100644
--- a/platform/javascript/js/libs/library_godot_http_request.js
+++ b/platform/javascript/js/libs/library_godot_http_request.js
@@ -82,31 +82,13 @@ const GodotHTTPRequest = {
 		GodotHTTPRequest.requests[xhrId].setRequestHeader(GodotRuntime.parseString(header), GodotRuntime.parseString(value));
 	},
 
-	godot_xhr_send_null__sig: 'vi',
-	godot_xhr_send_null: function (xhrId) {
-		GodotHTTPRequest.requests[xhrId].send();
-	},
-
-	godot_xhr_send_string__sig: 'vii',
-	godot_xhr_send_string: function (xhrId, strPtr) {
-		if (!strPtr) {
-			GodotRuntime.error('Failed to send string per XHR: null pointer');
-			return;
-		}
-		GodotHTTPRequest.requests[xhrId].send(GodotRuntime.parseString(strPtr));
-	},
-
-	godot_xhr_send_data__sig: 'viii',
-	godot_xhr_send_data: function (xhrId, ptr, len) {
-		if (!ptr) {
-			GodotRuntime.error('Failed to send data per XHR: null pointer');
-			return;
-		}
-		if (len < 0) {
-			GodotRuntime.error('Failed to send data per XHR: buffer length less than 0');
-			return;
+	godot_xhr_send__sig: 'viii',
+	godot_xhr_send: function (xhrId, p_ptr, p_len) {
+		let data = null;
+		if (p_ptr && p_len) {
+			data = GodotRuntime.heapCopy(HEAP8, p_ptr, p_len);
 		}
-		GodotHTTPRequest.requests[xhrId].send(HEAPU8.subarray(ptr, ptr + len));
+		GodotHTTPRequest.requests[xhrId].send(data);
 	},
 
 	godot_xhr_abort__sig: 'vi',