Add minetest.get_player_window_information() (luanti-org#12367)

builtin/mainmenu/tab_about.lua

@@ -165,7 +165,7 @@ return {
 		fs = fs .. "style[label_button2;border=false]" ..
 			"button[0.1,6;5.3,1;label_button2;" ..
 			fgettext("Active renderer:") .. "\n" ..
-			core.formspec_escape(core.get_screen_info().render_info) .. "]"
+			core.formspec_escape(core.get_active_renderer()) .. "]"
 
 		if PLATFORM == "Android" then
 			fs = fs .. "button[0.5,5.1;4.5,0.8;share_debug;" .. fgettext("Share debug log") .. "]"

doc/lua_api.txt

@@ -4975,6 +4975,7 @@ Utilities
           protocol_version = 32,     -- protocol version used by client
           formspec_version = 2,      -- supported formspec version
           lang_code = "fr"           -- Language code used for translation
+
           -- the following keys can be missing if no stats have been collected yet
           min_rtt = 0.01,            -- minimum round trip time
           max_rtt = 0.2,             -- maximum round trip time
@@ -4991,6 +4992,42 @@ Utilities
           --vers_string = "0.4.9-git", -- full version string
           --state = "Active"           -- current client state
       }
+* `minetest.get_player_window_information(player_name)`:
+
+      -- Will only be present if the client sent this information (requires v5.7+)
+      --
+      -- Note that none of these things are constant, they are likely to change during a client
+      -- connection as the player resizes the window and moves it between monitors
+      --
+      -- real_gui_scaling and real_hud_scaling can be used instead of DPI.
+      -- OSes don't necessarily give the physical DPI, as they may allow user configuration.
+      -- real_*_scaling is just OS DPI / 96 but with another level of user configuration.
+      {
+          -- Current size of the in-game render target (pixels).
+          --
+          -- This is usually the window size, but may be smaller in certain situations,
+          -- such as side-by-side mode.
+          size = {
+              x = 1308,
+              y = 577,
+          },
+
+          -- Estimated maximum formspec size before Minetest will start shrinking the
+          -- formspec to fit. For a fullscreen formspec, use a size 10-20% larger than
+          -- this and `padding[-0.01,-0.01]`.
+          max_formspec_size = {
+              x = 20,
+              y = 11.25
+          },
+
+          -- GUI Scaling multiplier
+          -- Equal to the setting `gui_scaling` multiplied by `dpi / 96`
+          real_gui_scaling = 1,
+
+          -- HUD Scaling multiplier
+          -- Equal to the setting `hud_scaling` multiplied by `dpi / 96`
+          real_hud_scaling = 1,
+      }
 
 * `minetest.mkdir(path)`: returns success.
     * Creates a directory specified by `path`, creating parent directories

doc/menu_lua_api.txt

@@ -203,17 +203,42 @@ GUI
         will be added to fieldname value is set to formname itself
   * if `is_file_select` is `true`, a file and not a folder will be selected
   * returns nil or selected file/folder
-* `core.get_screen_info()`
-  * returns
+* `core.get_active_renderer()`: Ex: "OpenGL 4.6".
+* `core.get_window_info()`: Same as server-side `get_player_window_information` API.
+
+      -- Note that none of these things are constant, they are likely to change
+      -- as the player resizes the window and moves it between monitors
+      --
+      -- real_gui_scaling and real_hud_scaling can be used instead of DPI.
+      -- OSes don't necessarily give the physical DPI, as they may allow user configuration.
+      -- real_*_scaling is just OS DPI / 96 but with another level of user configuration.
+      {
+          -- Current size of the in-game render target.
+          --
+          -- This is usually the window size, but may be smaller in certain situations,
+          -- such as side-by-side mode.
+          size = {
+              x = 1308,
+              y = 577,
+          },
+
+          -- Estimated maximum formspec size before Minetest will start shrinking the
+          -- formspec to fit. For a fullscreen formspec, use a size 10-20% larger than
+          -- this and `padding[-0.01,-0.01]`.
+          max_formspec_size = {
+              x = 20,
+              y = 11.25
+          },
+
+          -- GUI Scaling multiplier
+          -- Equal to the setting `gui_scaling` multiplied by `dpi / 96`
+          real_gui_scaling = 1,
+
+          -- HUD Scaling multiplier
+          -- Equal to the setting `hud_scaling` multiplied by `dpi / 96`
+          real_hud_scaling = 1,
+      }
 
-        {
-          density         = <screen density 0.75,1.0,2.0,3.0 ... (dpi)>,
-          display_width   = <width of display>,
-          display_height  = <height of display>,
-          window_width    = <current window width>,
-          window_height   = <current window height>,
-          render_info     = <active render information>
-        }
 
 
 Content and Packages

games/devtest/mods/testfullscreenfs/init.lua

@@ -0,0 +1,29 @@
+local function show_fullscreen_fs(name)
+	local window = minetest.get_player_window_information(name)
+	if not window then
+		return false, "Unable to get window info"
+	end
+
+	print(dump(window))
+
+	local size = { x = window.max_formspec_size.x * 1.1, y = window.max_formspec_size.y * 1.1 }
+	local fs = {
+		"formspec_version[4]",
+		("size[%f,%f]"):format(size.x, size.y),
+		"padding[-0.01,-0.01]",
+		("button[%f,%f;1,1;%s;%s]"):format(0, 0, "tl", "TL"),
+		("button[%f,%f;1,1;%s;%s]"):format(size.x - 1, 0, "tr", "TR"),
+		("button[%f,%f;1,1;%s;%s]"):format(size.x - 1, size.y - 1, "br", "BR"),
+		("button[%f,%f;1,1;%s;%s]"):format(0, size.y - 1, "bl", "BL"),
+
+		("label[%f,%f;%s]"):format(size.x / 2, size.y / 2, "Fullscreen")
+	}
+
+	minetest.show_formspec(name, "testfullscreenfs:fs", table.concat(fs))
+	return true, ("Calculated size of %f, %f"):format(size.x, size.y)
+end
+
+
+minetest.register_chatcommand("testfullscreenfs", {
+	func = show_fullscreen_fs,
+})

games/devtest/mods/testfullscreenfs/mod.conf

@@ -0,0 +1,2 @@
+name = testfullscreenfs
+description = Test mod to use minetest.get_player_window_information()

src/client/client.cpp

@@ -1415,6 +1415,17 @@ void Client::sendHaveMedia(const std::vector<u32> &tokens)
 	Send(&pkt);
 }
 
+void Client::sendUpdateClientInfo(const ClientDynamicInfo& info)
+{
+	NetworkPacket pkt(TOSERVER_UPDATE_CLIENT_INFO, 4*2 + 4 + 4 + 4*2);
+	pkt << (u32)info.render_target_size.X << (u32)info.render_target_size.Y;
+	pkt << info.real_gui_scaling;
+	pkt << info.real_hud_scaling;
+	pkt << (f32)info.max_fs_size.X << (f32)info.max_fs_size.Y;
+
+	Send(&pkt);
+}
+
 void Client::removeNode(v3s16 p)
 {
 	std::map<v3s16, MapBlock*> modified_blocks;

src/client/client.h

@@ -38,6 +38,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "network/address.h"
 #include "network/peerhandler.h"
 #include "gameparams.h"
+#include "clientdynamicinfo.h"
 #include <fstream>
 #include "util/numeric.h"
 
@@ -251,6 +252,7 @@ class Client : public con::PeerHandler, public InventoryManager, public IGameDef
 	void sendRespawn();
 	void sendReady();
 	void sendHaveMedia(const std::vector<u32> &tokens);
+	void sendUpdateClientInfo(const ClientDynamicInfo &info);
 
 	ClientEnvironment& getEnv() { return m_env; }
 	ITextureSource *tsrc() { return getTextureSource(); }

src/client/game.cpp

@@ -71,6 +71,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "version.h"
 #include "script/scripting_client.h"
 #include "hud.h"
+#include "clientdynamicinfo.h"
 
 #if USE_SOUND
 	#include "client/sound_openal.h"
@@ -917,12 +918,16 @@ class Game {
 	static const ClientEventHandler clientEventHandler[CLIENTEVENT_MAX];
 
 	f32 getSensitivityScaleFactor() const;
+	ClientDynamicInfo getCurrentDynamicInfo() const;
 
 	InputHandler *input = nullptr;
 
 	Client *client = nullptr;
 	Server *server = nullptr;
 
+	ClientDynamicInfo client_display_info{};
+	float dynamic_info_send_timer = 0;
+
 	IWritableTextureSource *texture_src = nullptr;
 	IWritableShaderSource *shader_src = nullptr;
 
@@ -1187,31 +1192,44 @@ void Game::run()
 			&& client->checkPrivilege("fast");
 #endif
 
-	irr::core::dimension2d<u32> previous_screen_size(g_settings->getU16("screen_w"),
+	v2u32 previous_screen_size(g_settings->getU16("screen_w"),
 		g_settings->getU16("screen_h"));
 
 	while (m_rendering_engine->run()
 			&& !(*kill || g_gamecallback->shutdown_requested
 			|| (server && server->isShutdownRequested()))) {
 
-		const irr::core::dimension2d<u32> &current_screen_size =
-			m_rendering_engine->get_video_driver()->getScreenSize();
+		// Calculate dtime =
+		//    m_rendering_engine->run() from this iteration
+		//  + Sleep time until the wanted FPS are reached
+		draw_times.limit(device, &dtime);
+
+		const auto current_dynamic_info = getCurrentDynamicInfo();
+		if (!current_dynamic_info.equal(client_display_info)) {
+			client_display_info = current_dynamic_info;
+			dynamic_info_send_timer = 0.2f;
+		}
+
+		if (dynamic_info_send_timer > 0) {
+			dynamic_info_send_timer -= dtime;
+			if (dynamic_info_send_timer <= 0) {
+				client->sendUpdateClientInfo(current_dynamic_info);
+			}
+		}
+
+		const auto &current_screen_size = current_dynamic_info.render_target_size;
+
 		// Verify if window size has changed and save it if it's the case
 		// Ensure evaluating settings->getBool after verifying screensize
 		// First condition is cheaper
 		if (previous_screen_size != current_screen_size &&
 				current_screen_size != irr::core::dimension2d<u32>(0,0) &&
 				g_settings->getBool("autosave_screensize")) {
-			g_settings->setU16("screen_w", current_screen_size.Width);
-			g_settings->setU16("screen_h", current_screen_size.Height);
+			g_settings->setU16("screen_w", current_screen_size.X);
+			g_settings->setU16("screen_h", current_screen_size.Y);
 			previous_screen_size = current_screen_size;
 		}
 
-		// Calculate dtime =
-		//    m_rendering_engine->run() from this iteration
-		//  + Sleep time until the wanted FPS are reached
-		draw_times.limit(device, &dtime);
-
 		// Prepare render data for next iteration
 
 		updateStats(&stats, draw_times, dtime);
@@ -2583,6 +2601,19 @@ f32 Game::getSensitivityScaleFactor() const
 	return tan(fov_y / 2.0f) * 1.3763818698f;
 }
 
+ClientDynamicInfo Game::getCurrentDynamicInfo() const
+{
+	v2u32 screen_size = RenderingEngine::getWindowSize();
+	f32 density = RenderingEngine::getDisplayDensity();
+	f32 gui_scaling = g_settings->getFloat("gui_scaling") * density;
+	f32 hud_scaling = g_settings->getFloat("hud_scaling") * density;
+
+	return {
+		screen_size, gui_scaling, hud_scaling,
+		ClientDynamicInfo::calculateMaxFSSize(screen_size)
+	};
+}
+
 void Game::updateCameraOrientation(CameraOrientation *cam, float dtime)
 {
 #ifdef HAVE_TOUCHSCREENGUI

src/client/renderingengine.h

@@ -67,6 +67,12 @@ class RenderingEngine
 
 	void removeMesh(const scene::IMesh* mesh);
 
+	/**
+	 * This takes 3d_mode into account - side-by-side will return a
+	 * halved horizontal size.
+	 *
+	 * @return "window" size
+	 */
 	static v2u32 getWindowSize()
 	{
 		sanity_check(s_singleton);

src/clientdynamicinfo.h

@@ -0,0 +1,51 @@
+/*
+Minetest
+Copyright (C) 2022-3 rubenwardy <[email protected]>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include "irrTypes.h"
+
+
+struct ClientDynamicInfo
+{
+	v2u32 render_target_size;
+	f32 real_gui_scaling;
+	f32 real_hud_scaling;
+	v2f32 max_fs_size;
+
+	bool equal(const ClientDynamicInfo &other) const {
+		return render_target_size == other.render_target_size &&
+				abs(real_gui_scaling - other.real_gui_scaling) < 0.001f &&
+				abs(real_hud_scaling - other.real_hud_scaling) < 0.001f;
+	}
+
+	static v2f32 calculateMaxFSSize(v2u32 render_target_size) {
+		f32 factor =
+#ifdef HAVE_TOUCHSCREENGUI
+				10;
+#else
+				15;
+#endif
+		f32 ratio = (f32)render_target_size.X / (f32)render_target_size.Y;
+		if (ratio < 1)
+			return { factor, factor / ratio };
+		else
+			return { factor * ratio, factor };
+	}
+};

src/clientiface.h

@@ -28,6 +28,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "network/address.h"
 #include "porting.h"
 #include "threading/mutex_auto_lock.h"
+#include "clientdynamicinfo.h"
 
 #include <list>
 #include <vector>
@@ -350,6 +351,9 @@ class RemoteClient
 	void setCachedAddress(const Address &addr) { m_addr = addr; }
 	const Address &getAddress() const { return m_addr; }
 
+	void setDynamicInfo(const ClientDynamicInfo &info) { m_dynamic_info = info; }
+	const ClientDynamicInfo &getDynamicInfo() const { return m_dynamic_info; }
+
 private:
 	// Version is stored in here after INIT before INIT2
 	u8 m_pending_serialization_version = SER_FMT_VER_INVALID;
@@ -360,9 +364,12 @@ class RemoteClient
 	// Cached here so retrieval doesn't have to go to connection API
 	Address m_addr;
 
-	// Client sent language code
+	// Client-sent language code
 	std::string m_lang_code;
 
+	// Client-sent dynamic info
+	ClientDynamicInfo m_dynamic_info{};
+
 	/*
 		Blocks that have been sent to client.
 		- These don't have to be sent again.

src/network/clientopcodes.cpp

@@ -223,4 +223,5 @@ const ServerCommandFactory serverCommandFactoryTable[TOSERVER_NUM_MSG_TYPES] =
 	{ "TOSERVER_FIRST_SRP",          1, true }, // 0x50
 	{ "TOSERVER_SRP_BYTES_A",        1, true }, // 0x51
 	{ "TOSERVER_SRP_BYTES_M",        1, true }, // 0x52
+	{ "TOSERVER_UPDATE_CLIENT_INFO", 1, true }, // 0x53
 };

src/network/networkprotocol.h

@@ -1062,7 +1062,15 @@ enum ToServerCommand
 		std::string bytes_M
 	*/
 
-	TOSERVER_NUM_MSG_TYPES = 0x53,
+	TOSERVER_UPDATE_CLIENT_INFO = 0x53,
+	/*
+		v2s16 render_target_size
+		f32 gui_scaling
+		f32 hud_scaling
+		v2f32 max_fs_info
+ 	*/
+
+	TOSERVER_NUM_MSG_TYPES = 0x54,
 };
 
 enum AuthMechanism