From 29b4b562c589346f2807dd0e986f39b8f8e8a20b Mon Sep 17 00:00:00 2001
From: Exeldro <exelsor@hotmail.com>
Date: Wed, 23 Aug 2023 09:28:43 +0200
Subject: [PATCH] Add function to resize the browser source from javascript

---
 README.md          |  9 +++++++++
 browser-app.cpp    |  2 +-
 browser-client.cpp | 24 ++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index c05512ba0..9c2c03a1a 100644
--- a/README.md
+++ b/README.md
@@ -312,6 +312,15 @@ Permissions required: ALL
 window.obsstudio.stopVirtualcam()
 ```
 
+#### Set the browser size
+Permissions required: BASIC
+```js
+/**
+ * @param {int} width - Width of the browser size
+ * @param {int} height - Height of the browser size
+ */
+window.obsstudio.setBrowserSize(width, height)
+```
 
 ### Register for visibility callbacks
 
diff --git a/browser-app.cpp b/browser-app.cpp
index 0f7a68dcd..2d8a40fe6 100644
--- a/browser-app.cpp
+++ b/browser-app.cpp
@@ -106,7 +106,7 @@ std::vector<std::string> exposedFunctions = {
 	"startReplayBuffer",   "stopReplayBuffer", "saveReplayBuffer",
 	"startVirtualcam",     "stopVirtualcam",   "getScenes",
 	"setCurrentScene",     "getTransitions",   "getCurrentTransition",
-	"setCurrentTransition"};
+	"setCurrentTransition","setBrowserSize"};
 
 void BrowserApp::OnContextCreated(CefRefPtr<CefBrowser> browser,
 				  CefRefPtr<CefFrame>,
diff --git a/browser-client.cpp b/browser-client.cpp
index 5a2f3a7f5..b1b0e31ca 100644
--- a/browser-client.cpp
+++ b/browser-client.cpp
@@ -198,6 +198,30 @@ bool BrowserClient::OnProcessMessageReceived(
 	case ControlLevel::Basic:
 		if (name == "saveReplayBuffer") {
 			obs_frontend_replay_buffer_save();
+		} else if (name == "setBrowserSize") {
+			int width = input_args->GetInt(1);
+			int height = input_args->GetInt(2);
+			if (!width)
+				width = (int)round(input_args->GetDouble(1));
+			if (!height)
+				height = (int)round(input_args->GetDouble(2));
+			if (width > 0 && height > 0) {
+				obs_data_t *s =
+					obs_source_get_settings(bs->source);
+				if (s &&
+				    (obs_data_get_int(s, "width") != width ||
+				     obs_data_get_int(s, "height") != height)) {
+					obs_data_set_int(s, "width", width);
+					obs_data_set_int(s, "height", height);
+					obs_source_update(bs->source, nullptr);
+					obs_data_release(s);
+				}
+			} else {
+				blog(LOG_WARNING,
+				     "Browser source '%s' tried to change its size to %ix%i",
+				     obs_source_get_name(bs->source), width,
+				     height);
+			}
 		}
 		[[fallthrough]];
 	case ControlLevel::ReadUser: