Added support for new Dear ImGui 1.92 textures (with its improved font atlas)

This is the cumulative work submitted to the 'Task_NewImguiFont' branch and adding support for the new Dear ImGui managed textures support as of 1.92.
This is used by Dear ImGui to update the font atlas texture when blitting only the needed characters, but also supports user adding their own textures to it.
2 NetImgui samples have been removed (DualUI and DPI) since the first one isn't supported anymore, and the second one became mooth with improved font that now support remote and local DPI without needing user to code anything.

Need to finish adapting the NetImguiServer OpenGL and Sokol backend to work with this.

------------------------------
commit 9523152
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Tue Dec 30 20:07:56 2025 -0500

    Fix for Server font resize crash

commit c8220b6
Merge: 06b1704 d29d6a0
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Tue Dec 30 17:35:16 2025 -0500

    Merge branch 'Task_NewImguiFont' of https://github.com/sammyfreg/netImgui into Task_NewImguiFont

commit 06b1704
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Tue Dec 30 17:34:33 2025 -0500

    Ongoing work on texture refactor

    Almost no issues left (need to fix server fotn resize crash).
    A lot of cleanup.

commit d29d6a0
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Tue Dec 30 17:34:33 2025 -0500

    Ongoing work on texture refactor

    Almost no issues left (need to fix server fotn resize crash).
    A lot of cleanup.

commit 7394136
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Sat Dec 27 13:23:46 2025 -0500

    Updated Sample Texture to test multiple partial updates on a texture in same frame

commit ab52994
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Fri Dec 26 20:19:58 2025 -0500

    Fix for win32 sample crash

commit ad1a253
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Tue Dec 23 20:25:13 2025 -0500

    Removed the FontDPI sample and fixed some compatibility errors

    With the new Dear ImGui font texture handling, there's no need anymore to regenerate the texture and use callbacks, everything is now seamless, so I removed the Sample.
    Also fixed some older Dear ImGui compatibilities errors.

commit 15fb869
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Tue Dec 23 13:42:19 2025 -0500

    Functional support for new Dear ImGui texture

    Most things now seem to work, all but one samples are fully functional.
    DPI sample is currently disabled, needs to have it handle the new font scaling properly, and add a sample to test old style too.

commit 33493fc
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Fri Dec 19 17:51:49 2025 -0500

    Support for texture update in

    Need to fix texture deletion proper release

commit c680bdb
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Fri Jul 11 17:41:55 2025 -0400

    Support Server window DPI Scale when drawing client

commit 3ee5e29
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Mon Jul 7 20:23:04 2025 -0400

    Updated Dear ImGui to 1.92

    Lots of changes to support dynamic font and texture update.
    This is a first pass where most things compiles, but things are far from fully functional.

    Still need to :
    -Handle texture partial updates
    -Handle Server DPI setting application on client
    -Fix all samples to work properly

commit cf65167
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Mon Mar 10 19:42:19 2025 -0400

    New Font Texture Update support

    Initial support, with some issue (texture management, font scaling, etc...) and cleanup left to do

commit 9b9b465
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Sat Dec 28 10:30:39 2024 -0500

    Font Atlas rework

    1st version with remote display working with new font atlas update support.
    Unreliable and messy

commit cf3de75
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Sun Dec 15 18:32:51 2024 -0500

    Fixed NetImguiServer to run with new Dear ImGui branch

    Temp disabling docking features
    Client do not render yet

commit 697bb86
Author: Sammy Fatnassi <sammyfreg@gmail.com>
Date:   Sat Dec 14 14:26:08 2024 -0500

    Updated to experimental font branch

    Updated Dear ImGui to experiemental font gen branch, and made sure Sample can run
    NetImgui textures not functional yet.

Author: sammyfreg

Build/netImgui.sharpmake.cs

@@ -13,24 +13,31 @@ namespace NetImgui
 	// PROJECTS
 	//=============================================================================================
 	// Generate the default Imgui/netImgui Libraries (used to link against with Samples/Server)
-	[Sharpmake.Generate] public class ProjectNetImgui16_Default : ProjectNetImgui 
+	[Sharpmake.Generate] public class ProjectNetImgui16_Default : ProjectNetImgui
 	{ 
 		public ProjectNetImgui16_Default() : base(NetImguiTarget.GetPath(ProjectImgui.sDefaultPath)) { Name = "NetImgui16Lib"; } 
+
+		public override void ConfigureAll(Configuration conf, NetImguiTarget target)
+        {
+			base.ConfigureAll(conf, target);
+            conf.Defines.Add("NETIMGUI_ENABLED=1");
+        }
 	}
 
-	[Sharpmake.Generate] public class ProjectNetImgui32_Default : ProjectNetImgui 
+	[Sharpmake.Generate] public class ProjectNetImgui32_Default : ProjectNetImgui
 	{ 
 		public ProjectNetImgui32_Default() : base(NetImguiTarget.GetPath(ProjectImgui.sDefaultPath)) { Name = "NetImgui32Lib"; } 
 
 		public override void ConfigureAll(Configuration conf, NetImguiTarget target)
         {
 			base.ConfigureAll(conf, target);
 			conf.Defines.Add("ImDrawIdx=unsigned int");
-		}
+            conf.Defines.Add("NETIMGUI_ENABLED=1");
+        }
 	}
 
 	// Test compiling netImgui with the Disabled Define
-	[Sharpmake.Generate] public class ProjectNetImgui_Disabled : ProjectNetImgui 
+	[Sharpmake.Generate] public class ProjectNetImgui_Disabled : ProjectNetImgui
 	{ 
 		public ProjectNetImgui_Disabled() : base(NetImguiTarget.GetPath(ProjectImgui.sDefaultPath)) { Name = "NetImguiLib (Disabled)"; }
 
@@ -64,7 +71,7 @@ public ProjectNetImguiServer()
 			// For the OpenGL Server build
 			AdditionalSourceRootPaths.Add(NetImguiTarget.GetPath(@"\Code\ThirdParty\glfw\include"));
 			AdditionalSourceRootPaths.Add(NetImguiTarget.GetPath(@"\Code\ThirdParty\glad30core\include"));
-			AdditionalSourceRootPaths.Add(NetImguiTarget.GetPath(@"\Code\ThirdParty\glad30core\src"));			
+			AdditionalSourceRootPaths.Add(NetImguiTarget.GetPath(@"\Code\ThirdParty\glad30core\src"));
 			SourceFilesBuildExcludeRegex.Add(@"ThirdParty\\glfw\\");
 			//---------------------------------------------
 		}
@@ -77,7 +84,7 @@ public override void ConfigureAll(Configuration conf, NetImguiTarget target)
 			conf.AddPublicDependency<ProjectNetImgui32_Default>(target);
 
 			conf.Defines.Add("IS_NETIMGUISERVER=1");	// 
-			conf.Defines.Add("ImTextureID=ImU64");		// Server must absolutly use at minimum 64bits texture id, even when compiled in 32 bits			
+			conf.Defines.Add("ImTextureUserID=ImU64");		// Server must absolutly use at minimum 64bits texture id, even when compiled in 32 bits			
 
 			conf.IncludePaths.Add(SourceRootPath + @"\Source");
 			conf.IncludePaths.Add(NetImguiTarget.GetPath(ProjectImgui.sDefaultPath));
@@ -149,8 +156,6 @@ public override void ConfigureAll(Configuration conf, NetImguiTarget target)
 	// Standard samples
 	//-------------------------------------------------------------------------
 	[Sharpmake.Generate] public class ProjectSample_Basic 		: ProjectSample { public ProjectSample_Basic() 		: base("SampleBasic"){} }
-	[Sharpmake.Generate] public class ProjectSample_FontDPI		: ProjectSample { public ProjectSample_FontDPI() 	: base("SampleFontDPI"){} }
-	[Sharpmake.Generate] public class ProjectSample_DualUI 		: ProjectSample { public ProjectSample_DualUI()		: base("SampleDualUI"){} }	
 	[Sharpmake.Generate] public class ProjectSample_Textures	: ProjectSample { public ProjectSample_Textures() 	: base("SampleTextures"){} }
 	[Sharpmake.Generate] public class ProjectSample_NewFrame	: ProjectSample { public ProjectSample_NewFrame()	: base("SampleNewFrame"){} }
 	[Sharpmake.Generate] public class ProjectSample_Background	: ProjectSample { public ProjectSample_Background()	: base("SampleBackground"){} }
@@ -279,8 +284,6 @@ public static void AddSampleProjects(Configuration conf, NetImguiTarget target)
 		{
 			string SolutionFolder = "Samples";
 			conf.AddProject<ProjectSample_Basic>(target, false, SolutionFolder);			
-			conf.AddProject<ProjectSample_FontDPI>(target, false, SolutionFolder);
-			conf.AddProject<ProjectSample_DualUI>(target, false, SolutionFolder);
 			conf.AddProject<ProjectSample_NewFrame>(target, false, SolutionFolder);
 			conf.AddProject<ProjectSample_Compression>(target, false, SolutionFolder);			
 			conf.AddProject<ProjectSample_Textures>(target, false, SolutionFolder);
@@ -329,4 +332,4 @@ public static void SharpmakeMain(Sharpmake.Arguments arguments)
 			arguments.Generate<SolutionSample>();
         }		
 	}
-}
+}

Build/shared.sharpmake.cs

@@ -244,7 +244,13 @@ public ProjectImgui()
 			SourceRootPath = NetImguiTarget.GetPath(sDefaultPath);
 			SourceFilesExcludeRegex.Add(@"backends\.*");
 		}
-		
+
+        public override void ConfigureAll(Configuration conf, NetImguiTarget target)
+        {
+            base.ConfigureAll(conf, target);
+            conf.IncludePaths.Add(NetImguiTarget.GetPath(sDefaultPath));
+        }
+
 		public static string sDefaultPath = @"\Code\ThirdParty\DearImgui";
 	}
 
@@ -263,7 +269,7 @@ public override void ConfigureAll(Configuration conf, NetImguiTarget target)
 
 	// Dear ImGui Library, 32bits index
 	[Sharpmake.Generate] 
-	public class ProjectImguiIndex32 : ProjectImgui 
+	public class ProjectImguiIndex32 : ProjectImgui
 	{ 
 		public ProjectImguiIndex32() { Name = "DearImguiIndex32Lib"; }
 
@@ -283,7 +289,7 @@ public class ProjectImguiServer : ProjectImgui
 		public override void ConfigureAll(Configuration conf, NetImguiTarget target)
         {
 			base.ConfigureAll(conf, target);
-			conf.Defines.Add("ImTextureID=ImU64");		// Server must absolutly use at minimum 64bits texture id, even when compiled in 32 bits			
+			conf.Defines.Add("ImTextureUserID=ImU64");		// Server must absolutly use at minimum 64bits texture id, even when compiled in 32 bits			
 			EnabledImguiIndex32Bits(conf);
 		}
 	}

Code/Client/NetImgui_Api.h

@@ -4,14 +4,12 @@
 //! @Name		: NetImgui
 //=================================================================================================
 //! @author		: Sammy Fatnassi
-//! @date		: 2024/12/10
-//!	@version	: v1.12.1
+//! @date		: 2026/01/01
+//!	@version	: v1.12.3
 //! @Details	: For integration info : https://github.com/sammyfreg/netImgui/wiki
 //=================================================================================================
-#define NETIMGUI_VERSION		"1.12.1"	// Fixed disconnect thread contention and clipboard command
-#define NETIMGUI_VERSION_NUM	11201
-
-
+#define NETIMGUI_VERSION		"1.12.3"	// Imported Texture rework into dev branch
+#define NETIMGUI_VERSION_NUM	11203
 
 
 //-------------------------------------------------------------------------------------------------
@@ -53,7 +51,7 @@
 // we define this library as 'Disabled'
 //-------------------------------------------------------------------------------------------------
 #ifndef NETIMGUI_ENABLED
-	#define NETIMGUI_ENABLED 0
+	#define NETIMGUI_ENABLED 					0
 #endif
 
 //-------------------------------------------------------------------------------------------------
@@ -63,7 +61,19 @@
 //-------------------------------------------------------------------------------------------------
 #if !defined(IMGUI_VERSION)
 	#undef	NETIMGUI_ENABLED
-	#define NETIMGUI_ENABLED 0
+	#define NETIMGUI_ENABLED 					0
+#endif
+
+//-------------------------------------------------------------------------------------------------
+// Control support for native Dear ImGui texture backend support
+// At the moment, meant to always be active on recent Dear Imgui version (1.92+)
+//-------------------------------------------------------------------------------------------------
+#ifndef NETIMGUI_IMGUI_TEXTURES_ENABLED
+#ifdef IMGUI_HAS_TEXTURES
+	#define NETIMGUI_IMGUI_TEXTURES_ENABLED		1
+#else
+	#define NETIMGUI_IMGUI_TEXTURES_ENABLED		0
+#endif
 #endif
 
 #if NETIMGUI_ENABLED
@@ -74,20 +84,19 @@
 // Default Build settings defines values
 // Assign default values when not set in user NetImgui_Config.h
 //=================================================================================================
-
 //-------------------------------------------------------------------------------------------------
 // Prepended to functions signature, for dll export/import
 //-------------------------------------------------------------------------------------------------
 #ifndef NETIMGUI_API
-	#define NETIMGUI_API						IMGUI_API						// Use same value as defined by Dear ImGui by default 
+	#define NETIMGUI_API						IMGUI_API	// Use same value as defined by Dear ImGui by default 
 #endif
 
 //-------------------------------------------------------------------------------------------------
 // Enable TCP socket 'reuse port' option when opening it as a 'listener'.
 // Note:	Can help when unable to open a socket because it wasn't properly released after a crash.
 //-------------------------------------------------------------------------------------------------
 #ifndef NETIMGUI_FORCE_TCP_LISTEN_BINDING
-	#define NETIMGUI_FORCE_TCP_LISTEN_BINDING	0								// Doesn't seem to be needed on Window/Linux
+	#define NETIMGUI_FORCE_TCP_LISTEN_BINDING	0	// Doesn't seem to be needed on Window/Linux
 #endif
 
 //-------------------------------------------------------------------------------------------------
@@ -102,24 +111,17 @@
 	#define NETIMGUI_IMGUI_CALLBACK_ENABLED		(IMGUI_VERSION_NUM >= 18100)	// Not supported pre Dear ImGui 1.81
 #endif
 
-// Temporary code to support the new Font Texture Update
-// Very inneficient, this is a stop gap measure until 
-// the partial texture update support is finished in NetImgui
-#ifdef IMGUI_HAS_TEXTURES
-	#define NETIMGUI_FONTUPDATE_TEMP_WORKAROUND 1
-#else
-	#define NETIMGUI_FONTUPDATE_TEMP_WORKAROUND 0
-#endif
-
 namespace NetImgui 
 { 
 
 //=================================================================================================
 // List of texture format supported
 //=================================================================================================
 enum eTexFormat {
-	kTexFmtA8,
+	// Match Dear Imgui 1.92 'ImTextureFormat'
 	kTexFmtRGBA8,
+	kTexFmtA8,
+	
 
 	// Support of 'user defined' texture format.
 	// Implementation must be added on both client and Server code. 
@@ -176,6 +178,7 @@ NETIMGUI_API	void				Shutdown();
 //						  the font atlas, because of a monitor DPI change. When left to nullptr,
 //						  uses 'ImGuiIO.FontGlobalScale' instead to increase text size,
 //						  with blurier results.
+//						  NOTE: Not used by Dear ImGui 1.92+, unneeded with font update support.
 //=================================================================================================
 NETIMGUI_API	bool				ConnectToApp(const char* clientName, const char* serverHost, uint32_t serverPort=kDefaultServerPort, ThreadFunctPtr threadFunction=0, FontCreateFuncPtr FontCreateFunction=0);
 NETIMGUI_API	bool				ConnectFromApp(const char* clientName, uint32_t clientPort=kDefaultClientPort, ThreadFunctPtr threadFunction=0, FontCreateFuncPtr fontCreateFunction=0);
@@ -211,8 +214,10 @@ NETIMGUI_API	bool				IsDrawingRemote(void);
 //=================================================================================================
 // Send an updated texture used by imgui, to the NetImguiServer application
 // Note: To remove a texture, set pData to nullptr
-// Note: User needs to provide a valid 'dataSize' when using format 'kTexFmtCustom', 
+// Note: User needs to provide a valid 'dataSize' when using format 'kTexFmtCustom',
 //		 can be ignored otherwise
+// Note: Can now rely on native Dear ImGui managed texture support to let the system handle their
+//		 creation/update/destruction automatically (since Dear ImGui 1.92+. See 'SampleTextures').
 //=================================================================================================
 NETIMGUI_API	void				SendDataTexture(ImTextureID textureId, void* pData, uint16_t width, uint16_t height, eTexFormat format, uint32_t dataSize=0);
 
@@ -251,6 +256,9 @@ NETIMGUI_API	ImGuiContext*		GetContext();
 NETIMGUI_API	void				SetBackground(const ImVec4& bgColor);
 NETIMGUI_API	void				SetBackground(const ImVec4& bgColor, const ImVec4& textureTint );
 NETIMGUI_API	void				SetBackground(const ImVec4& bgColor, const ImVec4& textureTint, ImTextureID bgTextureID);
+#if NETIMGUI_IMGUI_TEXTURES_ENABLED
+NETIMGUI_API	void				SetBackground(const ImVec4& bgColor, const ImVec4& textureTint, const ImTextureRef& bgTextureRef);
+#endif
 
 //=================================================================================================
 // Control the data compression for communications between Client/Server
@@ -264,7 +272,7 @@ NETIMGUI_API	eCompressionMode	GetCompressionMode();
 NETIMGUI_API	uint8_t				GetTexture_BitsPerPixel	(eTexFormat eFormat);
 NETIMGUI_API	uint32_t			GetTexture_BytePerLine	(eTexFormat eFormat, uint32_t pixelWidth);
 NETIMGUI_API	uint32_t			GetTexture_BytePerImage	(eTexFormat eFormat, uint32_t pixelWidth, uint32_t pixelHeight);
-} 
+}
 
 //=================================================================================================
 // Optional single include compiling option