ADD: WebASM port (no sound/no network)

2026-03-19 14:33:30 +00:00 · 2026-03-19 02:26:34 +03:00
parent 4769d4ae72
commit e9914e3fbd
13 changed files with 408 additions and 119 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,48 +11,69 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
 endif()

 find_package(Threads REQUIRED)
-
 find_package(OpenSSL)
-if (OpenSSL_FOUND)
-    message(STATUS "found openssl ${OPENSSL_VERSION}")
+
+if(EMSCRIPTEN)
+    set(AL_LIBTYPE "STATIC")
+else()
+    set(AL_LIBTYPE "SHARED")
 endif()

-CPMAddPackage("gh:madler/zlib@1.3.2")
-CPMAddPackage(
-    NAME "libpng"
-    GIT_REPOSITORY "https://github.com/pnggroup/libpng.git"
-    GIT_TAG "v1.6.55"
-    EXCLUDE_FROM_ALL TRUE
-    OPTIONS
-        "ZLIB_ROOT ${zlib_SOURCE_DIR}"
-        "ZLIB_INCLUDE_DIRS ${zlib_SOURCE_DIR}"
-        "PNG_TOOLS OFF"
-        "PNG_TESTS OFF"
-        "BUILD_SHARED_LIBS ON"
-)
+# I totally shocked
+if(EMSCRIPTEN)
+    add_library(zlib INTERFACE IMPORTED)
+    set_target_properties(zlib PROPERTIES
+        INTERFACE_LINK_OPTIONS "-sUSE_ZLIB=1"
+    )
+
+    add_library(png INTERFACE IMPORTED)
+    set_target_properties(png PROPERTIES
+        INTERFACE_LINK_OPTIONS "-sUSE_LIBPNG=1"
+    )
+
+    add_library(glfw INTERFACE IMPORTED)
+    set_target_properties(glfw PROPERTIES
+        INTERFACE_LINK_OPTIONS "-sUSE_GLFW=3"
+    )
+else()
+    CPMAddPackage(
+        NAME "zlib"
+        GIT_REPOSITORY "https://github.com/madler/zlib"
+        GIT_TAG "v1.3.2"
+    )
+
+    CPMAddPackage(
+        NAME "libpng"
+        GIT_REPOSITORY "https://github.com/pnggroup/libpng.git"
+        GIT_TAG "v1.6.55"
+        OPTIONS
+            "ZLIB_ROOT ${zlib_SOURCE_DIR}"
+            "ZLIB_INCLUDE_DIRS ${zlib_SOURCE_DIR}"
+            "PNG_TOOLS OFF"
+            "PNG_TESTS OFF"
+    )
+
+    CPMAddPackage(
+        NAME "glfw"
+        GIT_REPOSITORY "https://github.com/glfw/glfw.git"
+        GIT_TAG "3.4"
+        EXCLUDE_FROM_ALL TRUE
+        OPTIONS
+            "GLFW_BUILD_EXAMPLES OFF"
+            "GLFW_BUILD_TESTS OFF"
+            "GLFW_BUILD_DOCS OFF"
+    )
+endif()

 CPMAddPackage(
    NAME "openal"
    GIT_REPOSITORY "https://github.com/kcat/openal-soft.git"
    GIT_TAG "1.25.1"
-    EXCLUDE_FROM_ALL TRUE
    OPTIONS
        "ALSOFT_EXAMPLES OFF"
        "ALSOFT_TESTS OFF"
        "ALSOFT_UTILS OFF"
-        "BUILD_SHARED_LIBS ON"
-)
-
-CPMAddPackage(
-    NAME "glfw"
-    GIT_REPOSITORY "https://github.com/glfw/glfw.git"
-    GIT_TAG "3.4"
-    EXCLUDE_FROM_ALL TRUE
-    OPTIONS
-        "GLFW_BUILD_EXAMPLES OFF"
-        "GLFW_BUILD_TESTS OFF"
-        "GLFW_BUILD_DOCS OFF"
-        "BUILD_SHARED_LIBS ON"
+        "LIBTYPE ${AL_LIBTYPE}"
 )

 # TODO: Clear this paths with *
@@ -242,11 +263,15 @@ endif()


 if(PLATFORM STREQUAL "PLATFORM_WIN32")
-    list(APPEND CLIENT_SOURCES "src/AppPlatform_win32.cpp")
+    list(APPEND CLIENT_SOURCES "src/AppPlatform_win32.cpp" "glad/src/glad.c")
 endif()

 if(PLATFORM STREQUAL "PLATFORM_GLFW")
-    list(APPEND CLIENT_SOURCES "src/AppPlatform_glfw.cpp")
+    list(APPEND CLIENT_SOURCES "src/AppPlatform_glfw.cpp" "glad/src/glad.c")
+endif()
+
+if(EMSCRIPTEN)
+    list(APPEND CLIENT_SOURCES "glad/src/glad.c")
 endif()

 # Server
@@ -260,13 +285,10 @@ target_include_directories("${PROJECT_NAME}-server" PUBLIC
   "project/lib_projects/raknet/jni/RaknetSources"
 )

-target_link_libraries("${PROJECT_NAME}-server" ${CMAKE_THREAD_LIBS_INIT} png_shared)
+target_link_libraries("${PROJECT_NAME}-server" ${CMAKE_THREAD_LIBS_INIT})
 endif()

-add_executable(${PROJECT_NAME} 
-    ${CLIENT_SOURCES}
-    "glad/src/glad.c"
-)
+add_executable(${PROJECT_NAME} ${CLIENT_SOURCES})

 if(WIN32)
    set(EXTRA_LIBS "ws2_32")
@@ -277,8 +299,6 @@ if(PLATFORM STREQUAL "PLATFORM_WIN32" OR PLATFORM STREQUAL "PLATFORM_GLFW")
    target_compile_definitions(${PROJECT_NAME} PUBLIC "PLATFORM_DESKTOP")
 endif()

-
-
 target_include_directories(${PROJECT_NAME} PUBLIC 
    "${CMAKE_SOURCE_DIR}/glad/include/"
    "${CMAKE_SOURCE_DIR}/src"
@@ -287,9 +307,53 @@ target_include_directories(${PROJECT_NAME} PUBLIC
    "lib/include"
 )

+if(EMSCRIPTEN)
+    set(CMAKE_CXX_STANDARD 11)
+    # uuuh i hate it
+    set(EM_FLAGS "-pthread -sUSE_PTHREADS=1 -sSHARED_MEMORY=1")
+    
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EM_FLAGS}")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${EM_FLAGS}")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EM_FLAGS} --preload-file ${CMAKE_SOURCE_DIR}/data@/data -sPROXY_TO_PTHREAD")
+
+    target_compile_options(${PROJECT_NAME} PUBLIC
+        "-Os"
+        "-Wno-invalid-source-encoding"
+        "-Wno-narrowing"
+        "-Wno-deprecated-register"
+        "-Wno-reserved-user-defined-literal"
+    )
+
+    target_link_options(${PROJECT_NAME} PUBLIC
+        "-Os"
+        "-sALLOW_MEMORY_GROWTH=1"
+        "-sFORCE_FILESYSTEM=1"
+        "-sLEGACY_GL_EMULATION=1"
+        "-sGL_UNSAFE_OPTS=0"
+        "-sEMULATE_FUNCTION_POINTER_CASTS=1"
+        "-sALLOW_TABLE_GROWTH=1"
+        "-sEXPORTED_RUNTIME_METHODS=['FS','stringToUTF8','UTF8ToString','cwrap','ccall','HEAP8','HEAPU8','HEAP32','HEAPU32']"
+        "-sEXPORTED_FUNCTIONS=['_main']"
+    )
+
+    if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+        message("DEBUG MODE")
+
+        target_link_options(${PROJECT_NAME} PUBLIC
+            "-sASSERTIONS=2"
+            "-sSTACK_OVERFLOW_CHECK=2"
+            "-sSTACK_SIZE=5242880"
+            "-sGL_DEBUG=1"
+        )
+    endif()
+
+    target_compile_definitions(${PROJECT_NAME} PUBLIC "__EMSCRIPTEN__" "NO_SOUND" "NO_NETWORK")
+    set(EXTRA_LIBS "idbfs.js")
+endif()
+
 # Client
 target_compile_definitions(${PROJECT_NAME} PUBLIC "OPENGL_ES" "NO_EGL" ${PLATFORM})
-target_link_libraries(${PROJECT_NAME} zlib png_shared alsoft.common OpenAL::OpenAL glfw ${EXTRA_LIBS})
+target_link_libraries(${PROJECT_NAME} zlib png alsoft.common OpenAL::OpenAL glfw ${EXTRA_LIBS})

 if (OpenSSL_FOUND)
    target_link_libraries(${PROJECT_NAME} OpenSSL::SSL OpenSSL::Crypto)
@@ -297,19 +361,27 @@ if (OpenSSL_FOUND)
 endif()

 if (NOT UNIX)
-add_custom_command(
-    TARGET ${PROJECT_NAME} 
-    POST_BUILD
-        COMMAND ${CMAKE_COMMAND} -E copy_if_different $<TARGET_RUNTIME_DLLS:${PROJECT_NAME}> $<TARGET_FILE_DIR:${PROJECT_NAME}> 
-        COMMAND_EXPAND_LISTS
-)
+    add_custom_command(
+        TARGET ${PROJECT_NAME} 
+        POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different $<TARGET_RUNTIME_DLLS:${PROJECT_NAME}> $<TARGET_FILE_DIR:${PROJECT_NAME}> 
+            COMMAND_EXPAND_LISTS
+    )
 endif()

-add_custom_command(
-    TARGET ${PROJECT_NAME} 
-    POST_BUILD
-        COMMAND ${CMAKE_COMMAND} -E copy_directory "${CMAKE_SOURCE_DIR}/data" $<TARGET_FILE_DIR:${PROJECT_NAME}>/data
-)
+if(NOT EMSCRIPTEN)
+    add_custom_command(
+        TARGET ${PROJECT_NAME} 
+        POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_directory "${CMAKE_SOURCE_DIR}/data" $<TARGET_FILE_DIR:${PROJECT_NAME}>/data
+    )
+else()
+    add_custom_command(
+        TARGET ${PROJECT_NAME} 
+        POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_SOURCE_DIR}/misc/web/index.html" $<TARGET_FILE_DIR:${PROJECT_NAME}>
+    )
+endif()

 # Installing and packing

--- a/README.md
+++ b/README.md
@@ -167,3 +167,34 @@ cmake --build .

 8. Re run `build.sh`

+## Web
+1. Download and install **emsdk**: https://emscripten.org/docs/getting_started/downloads.html
+   > [!NOTE]
+   > On arch linux you can use AUR:
+   > `yay -Sy emsdk`
+   
+2. Configure and build project:
+   ```
+   mkdir build && cd build
+   cmake .. -B . -G Ninja "-DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
+   cmake --build . --target MinecraftPE
+   ```
+   > [!NOTE]
+   > If you are using VSCode with CMake plugin, you can add Emscripten kit
+   > 1. Press Ctrl + Shift + P
+   > 2. Type `CMake: Edit User-Local CMake Kits` and hit Enter
+   > 3. Add this:
+      ```json
+      {
+         "name": "Emscripten",
+         "compilers": {
+            "C": "/usr/lib/emsdk/upstream/bin/clang",
+            "CXX": "/usr/lib/emsdk/upstream/bin/clang++"
+         },
+         "toolchainFile": "/usr/lib/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
+      }
+      ```
+3. Run game:
+   ```
+   emrun --port 8080 .
+   ```
--- a/misc/web/index.html
+++ b/misc/web/index.html
@@ -0,0 +1,143 @@
+<!doctype html>
+<html lang="en-us">
+  <head>
+    <meta charset="utf-8">
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>Emscripten-Generated Code</title>
+    <style>
+      .emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
+      textarea.emscripten { font-family: monospace; width: 80%; }
+      div.emscripten { text-align: center; }
+      div.emscripten_border { border: 1px solid black; }
+      /* the canvas *must not* have any border or padding, or mouse coords will be wrong */
+      canvas.emscripten { border: 0px none; background-color: black; }
+
+      .spinner {
+        height: 50px;
+        width: 50px;
+        margin: 0px auto;
+        -webkit-animation: rotation .8s linear infinite;
+        -moz-animation: rotation .8s linear infinite;
+        -o-animation: rotation .8s linear infinite;
+        animation: rotation 0.8s linear infinite;
+        border-left: 10px solid rgb(0,150,240);
+        border-right: 10px solid rgb(0,150,240);
+        border-bottom: 10px solid rgb(0,150,240);
+        border-top: 10px solid rgb(100,0,200);
+        border-radius: 100%;
+        background-color: rgb(200,100,250);
+      }
+      @-webkit-keyframes rotation {
+        from {-webkit-transform: rotate(0deg);}
+        to {-webkit-transform: rotate(360deg);}
+      }
+      @-moz-keyframes rotation {
+        from {-moz-transform: rotate(0deg);}
+        to {-moz-transform: rotate(360deg);}
+      }
+      @-o-keyframes rotation {
+        from {-o-transform: rotate(0deg);}
+        to {-o-transform: rotate(360deg);}
+      }
+      @keyframes rotation {
+        from {transform: rotate(0deg);}
+        to {transform: rotate(360deg);}
+      }
+
+    </style>
+  </head>
+  <body>
+    <hr/>
+    <figure style="overflow:visible;" id="spinner"><div class="spinner"></div><center style="margin-top:0.5em"><strong>emscripten</strong></center></figure>
+    <div class="emscripten" id="status">Downloading...</div>
+    <div class="emscripten">
+      <progress value="0" max="100" id="progress" hidden=1></progress>
+    </div>
+    <div class="emscripten_border">
+      <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()" tabindex=-1></canvas>
+    </div>
+    <hr/>
+    <div class="emscripten">
+      <input type="checkbox" id="resize">Resize canvas
+      <input type="checkbox" id="pointerLock" checked>Lock/hide mouse pointer
+      &nbsp;&nbsp;&nbsp;
+      <input type="button" value="Fullscreen" onclick="Module.requestFullscreen(document.getElementById('pointerLock').checked,
+                                                                                document.getElementById('resize').checked)">
+    </div>
+
+    <hr/>
+    <textarea class="emscripten" id="output" rows="8"></textarea>
+    <hr>
+    <script type='text/javascript'>
+      var statusElement = document.getElementById('status');
+      var progressElement = document.getElementById('progress');
+      var spinnerElement = document.getElementById('spinner');
+      var canvasElement = document.getElementById('canvas');
+      var outputElement = document.getElementById('output');
+      if (outputElement) outputElement.value = ''; // clear browser cache
+
+      // As a default initial behavior, pop up an alert when webgl context is lost. To make your
+      // application robust, you may want to override this behavior before shipping!
+      // See http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15.2
+      canvasElement.addEventListener("webglcontextlost", (e) => {
+        alert('WebGL context lost. You will need to reload the page.');
+        e.preventDefault();
+      }, false);
+
+      function setStatus(text) {
+        if (!setStatus.last) setStatus.last = { time: Date.now(), text: '' };
+        if (text === setStatus.last.text) return;
+        var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
+        var now = Date.now();
+        if (m && now - setStatus.last.time < 30) return; // if this is a progress update, skip it if too soon
+        setStatus.last.time = now;
+        setStatus.last.text = text;
+        if (m) {
+          text = m[1];
+          progressElement.value = parseInt(m[2])*100;
+          progressElement.max = parseInt(m[4])*100;
+          progressElement.hidden = false;
+          spinnerElement.hidden = false;
+        } else {
+          progressElement.value = null;
+          progressElement.max = null;
+          progressElement.hidden = true;
+          if (!text) spinnerElement.hidden = true;
+        }
+        statusElement.innerHTML = text;
+      }
+
+      var Module = {
+        print(...args) {
+          // These replacements are necessary if you render to raw HTML
+          //text = text.replace(/&/g, "&amp;");
+          //text = text.replace(/</g, "&lt;");
+          //text = text.replace(/>/g, "&gt;");
+          //text = text.replace('\n', '<br>', 'g');
+          console.log(...args);
+          if (outputElement) {
+            var text = args.join(' ');
+            outputElement.value += text + "\n";
+            outputElement.scrollTop = outputElement.scrollHeight; // focus on bottom
+          }
+        },
+        canvas: canvasElement,
+        setStatus: setStatus,
+        totalDependencies: 0,
+        monitorRunDependencies(left) {
+          this.totalDependencies = Math.max(this.totalDependencies, left);
+          setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
+        }
+      };
+      setStatus('Downloading...');
+      window.onerror = () => {
+        setStatus('Exception thrown, see JavaScript console');
+        spinnerElement.style.display = 'none';
+        setStatus = (text) => {
+          if (text) console.error('[post-exception status] ' + text);
+        };
+      };
+    </script>
+    <script src="MinecraftPE.js"></script>
+  </body>
+</html>
--- a/src/AppPlatform_glfw.h
+++ b/src/AppPlatform_glfw.h
@@ -31,7 +31,7 @@ public:
    {
    }

-	BinaryBlob readAssetFile(const std::string& filename) {
+	BinaryBlob readAssetFile(const std::string& filename) override {
 		FILE* fp = fopen(("data/" + filename).c_str(), "r");
 		if (!fp)
 			return BinaryBlob();
@@ -48,7 +48,7 @@ public:
 		return blob;
 	}

-    void saveScreenshot(const std::string& filename, int glWidth, int glHeight) {
+    void saveScreenshot(const std::string& filename, int glWidth, int glHeight) override {
        //@todo
    }

@@ -56,7 +56,7 @@ public:
        return (p & 0xff00ff00) | ((p >> 16) & 0xff) | ((p << 16) & 0xff0000);
    }

-    TextureData loadTexture(const std::string& filename_, bool textureFolder)
+    TextureData loadTexture(const std::string& filename_, bool textureFolder) override
 	{
 		// Support fetching PNG textures via HTTP/HTTPS (for skins, etc)
 		if (Util::startsWith(filename_, "http://") || Util::startsWith(filename_, "https://")) {
@@ -132,10 +132,10 @@ public:
 		return std::string(mbstr);
 	}

-	virtual int getScreenWidth() { return 854; };
-	virtual int getScreenHeight() { return 480; };
+	virtual int getScreenWidth() override { return 854; };
+	virtual int getScreenHeight() override { return 480; };

-	virtual float getPixelsPerMillimeter();
+	virtual float getPixelsPerMillimeter() override;

 	virtual bool supportsTouchscreen() override { return true; }

@@ -148,6 +148,8 @@ public:
 #endif
 	}

+	GLFWwindow* window;
+
 private:
 };
 #endif /*APPPLATFORM_GLFW_H__*/
--- a/src/NinecraftApp.cpp
+++ b/src/NinecraftApp.cpp
@@ -245,8 +245,9 @@ void NinecraftApp::initGLStates()
 	glCullFace(GL_BACK);

 	glEnable2(GL_TEXTURE_2D);
+#ifndef _EMSCRIPTEN_
 	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
-
+#endif
 	// Both updates isPowerVR flag in java and returns if the graphics chip is PowerVR SGX or not
 	_powerVr = platform()->isPowerVR();
 #ifdef __APPLE__
--- a/src/client/gui/screens/CreditsScreen.cpp
+++ b/src/client/gui/screens/CreditsScreen.cpp
@@ -37,6 +37,8 @@ void CreditsScreen::init() {
    _lines.push_back("mschiller890");
    _lines.push_back("InviseDivine");
    _lines.push_back("Kolyah35");
+    _lines.push_back("karson");
+    _lines.push_back("deepfriedwaffles");
    _lines.push_back("");
    // avoid color tags around the URL so it isn't mangled by the parser please
    _lines.push_back("Join our Discord server: https://discord.gg/c58YesBxve");
--- a/src/client/gui/screens/touch/TouchSelectWorldScreen.h
+++ b/src/client/gui/screens/touch/TouchSelectWorldScreen.h
@@ -86,21 +86,21 @@ public:
 	SelectWorldScreen();
 	virtual ~SelectWorldScreen();

-	virtual void init();
-	virtual void setupPositions();
+	virtual void init() override;
+	virtual void setupPositions() override;

-	virtual void tick();
-	virtual void render(int xm, int ym, float a);
+	virtual void tick() override;
+	virtual void render(int xm, int ym, float a) override;

 	virtual bool isIndexValid(int index);
-	virtual bool handleBackEvent(bool isDown);
-	virtual void buttonClicked(Button* button);
-	virtual void keyPressed(int eventKey);
+	virtual bool handleBackEvent(bool isDown) override;
+	virtual void buttonClicked(Button* button) override;
+	virtual void keyPressed(int eventKey) override;

 	// support for mouse wheel when desktop code uses touch variant
 	virtual void mouseWheel(int dx, int dy, int xm, int ym) override;

-	bool isInGameScreen();
+	bool isInGameScreen() override;
 private:
 	void loadLevelSource();
 	std::string getUniqueLevelName(const std::string& level);
--- a/src/client/renderer/Tesselator.cpp
+++ b/src/client/renderer/Tesselator.cpp
@@ -79,6 +79,9 @@ RenderChunk Tesselator::end( bool useMine, int bufferId )
 	const int o_vertices = vertices;

 	if (vertices > 0) {
+		if (p <= 0 || p > maxVertices) { clear(); return RenderChunk(); }
+		int bytes = p * sizeof(VERTEX);
+		if (bytes <= 0) return RenderChunk();
 		if (++vboId >= vboCounts)
 			vboId = 0;

@@ -92,11 +95,11 @@ RenderChunk Tesselator::end( bool useMine, int bufferId )
 		bufferId = vboIds[vboId];
 #endif
 		int access = GL_STATIC_DRAW;//(accessMode==ACCESS_DYNAMIC) ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW;
-		int bytes = p * sizeof(VERTEX);
 		glBindBuffer2(GL_ARRAY_BUFFER, bufferId);
 		glBufferData2(GL_ARRAY_BUFFER, bytes, _varray, access); // GL_STREAM_DRAW
+		
 		totalSize += bytes;
-
+	
 #ifndef USE_VBO
 		// 0 1 2 3 4 5 6 7
 		// x y z u v c
@@ -264,6 +267,7 @@ void Tesselator::vertex( float x, float y, float z )
 		for (int i = 0; i < 2; i++) {

 			const int offs = 3 - i;
+			if (p - offs < 0 || p >= maxVertices) { clear(); return; }
 			VERTEX& src = _varray[p - offs];
 			VERTEX& dst = _varray[p];

@@ -287,6 +291,7 @@ void Tesselator::vertex( float x, float y, float z )
 		}
 	}

+	if (p < 0 || p >= maxVertices) { clear(); return; }
 	VERTEX& vertex = _varray[p];

 	if (hasTexture) {
@@ -377,13 +382,15 @@ void Tesselator::draw()
 	tesselating = false;

 	if (vertices > 0) {
+		if (p <= 0 || p > maxVertices) { clear(); return; }
+		int bytes = p * sizeof(VERTEX);
+		if (bytes <= 0) { clear(); return; }
 		if (++vboId >= vboCounts)
 			vboId = 0;

 		int bufferId = vboIds[vboId];
 		
 		int access = GL_DYNAMIC_DRAW;//(accessMode==ACCESS_DYNAMIC) ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW;
-		int bytes = p * sizeof(VERTEX);
 		glBindBuffer2(GL_ARRAY_BUFFER, bufferId);
 		glBufferData2(GL_ARRAY_BUFFER, bytes, _varray, access); // GL_STREAM_DRAW

--- a/src/client/renderer/gles.cpp
+++ b/src/client/renderer/gles.cpp
@@ -47,9 +47,13 @@ void glInit()
 }

 void anGenBuffers(GLsizei n, GLuint* buffers) {
-	static GLuint k = 1;
-	for (int i = 0; i < n; ++i)
-		buffers[i] = ++k;
+#ifdef __EMSCRIPTEN__
+    glGenBuffers(n, buffers);
+#else
+    static GLuint k = 1;
+    for (int i = 0; i < n; ++i)
+        buffers[i] = ++k;
+#endif
 }

 #ifdef USE_VBO
--- a/src/client/renderer/gles.h
+++ b/src/client/renderer/gles.h
@@ -10,13 +10,13 @@
 #endif

 // Other systems might run it, if they #define OPENGL_ES
-#if defined(OPENGL_ES) // || defined(ANDROID)
+// #if defined(OPENGL_ES) // || defined(ANDROID)
 	#define USE_VBO
 	#define GL_QUADS 0x0007
    #if defined(__APPLE__)
        #import <OpenGLES/ES1/gl.height>
        #import <OpenGLES/ES1/glext.height>
-    #elif defined(ANDROID)
+    #elif defined(ANDROID) || defined(__EMSCRIPTEN__)
        #include <GLES/gl.h>
        #include <GLES/glext.h>
    #else
@@ -28,18 +28,18 @@
 		#define glClearDepthf(x)        glClearDepth(x)
 		#define glDepthRangef(a,b)      glDepthRange(a,b)
    #endif
-#else
-    // Uglyness to fix redeclaration issues
-    #ifdef WIN32
-	   #include <WinSock2.h>
-	   #include <Windows.h>
-	#endif
-	#include <gl/glew.h>
-	#include <gl/GL.h>
+// #else
+//     // Uglyness to fix redeclaration issues
+//     #ifdef WIN32
+// 	   #include <WinSock2.h>
+// 	   #include <Windows.h>
+// 	#endif
+// 	#include <gl/glew.h>
+// 	#include <gl/GL.h>

-	#define glFogx(a,b)	glFogi(a,b)
-	#define glOrthof(a,b,c,d,e,f) glOrtho(a,b,c,d,e,f)
-#endif
+// 	#define glFogx(a,b)	glFogi(a,b)
+// 	#define glOrthof(a,b,c,d,e,f) glOrtho(a,b,c,d,e,f)
+// #endif


 #define GLERRDEBUG 1
--- a/src/main_glfw.h
+++ b/src/main_glfw.h
@@ -2,9 +2,9 @@
 #define MAIN_GLFW_H__

 #include "App.h"
-#include "GLFW/glfw3.h"
+#include "client/renderer/entity/PlayerRenderer.h"
 #include "client/renderer/gles.h"
-#include "SharedConstants.h"
+#include "GLFW/glfw3.h"

 #include <cstdio>
 #include <chrono>
@@ -12,9 +12,10 @@
 #include "platform/input/Keyboard.h"
 #include "platform/input/Mouse.h"
 #include "platform/input/Multitouch.h"
-#include "util/Mth.h"
 #include "AppPlatform_glfw.h"
-
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
 static App* g_app = 0;

 int transformKey(int glfwkey) {
@@ -112,12 +113,39 @@ void error_callback(int error, const char* desc) {
 	printf("Error: %s\n", desc);
 }

+
+void loop() {
+	using clock = std::chrono::steady_clock;
+	auto frameStart = clock::now();
+
+	g_app->update();
+
+	glfwSwapBuffers(((AppPlatform_glfw*)g_app->platform())->window);
+	glfwPollEvents();
+
+	glfwSwapInterval(((MAIN_CLASS*)g_app)->options.getBooleanValue(OPTIONS_VSYNC) ? 1 : 0);
+	if(((MAIN_CLASS*)g_app)->options.getBooleanValue(OPTIONS_LIMIT_FRAMERATE)) {
+		auto frameEnd = clock::now();
+		auto elapsed = std::chrono::duration_cast<std::chrono::microseconds>(frameEnd - frameStart);
+		auto target = std::chrono::microseconds(33333); // ~30 fps
+		if(elapsed < target)
+			std::this_thread::sleep_for(target - elapsed);
+	}
+}
+
 int main(void) {
 	AppContext appContext;

 #ifndef STANDALONE_SERVER
 	// Platform init.
 	appContext.platform = new AppPlatform_glfw();
+#if defined(DEBUG) && defined(__EMSCRIPTEN__)
+	EM_ASM({
+		console.log(FS.readdir("/"));
+		console.log(FS.readdir("/data"));
+		console.log(FS.readdir("/data/images"));
+	});
+#endif

 	glfwSetErrorCallback(error_callback);

@@ -126,26 +154,36 @@ int main(void) {
 	}

 	glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_NATIVE_CONTEXT_API);
+#ifndef __EMSCRIPTEN__
 	glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_API);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
+#else
+	glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 1);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
+#endif

-	GLFWwindow* window = glfwCreateWindow(appContext.platform->getScreenWidth(), appContext.platform->getScreenHeight(), "main", NULL, NULL);
+	AppPlatform_glfw* platform = (AppPlatform_glfw*)appContext.platform;
+
+	platform->window = glfwCreateWindow(appContext.platform->getScreenWidth(), appContext.platform->getScreenHeight(), "main", NULL, NULL);
 	
-	if (window == NULL) {
+	if (platform->window == NULL) {
 		return 1;
 	}

-	glfwSetKeyCallback(window, key_callback);
-	glfwSetCharCallback(window, character_callback);
-	glfwSetCursorPosCallback(window, cursor_position_callback);
-	glfwSetMouseButtonCallback(window, mouse_button_callback);
-	glfwSetScrollCallback(window, scroll_callback);
-	glfwSetWindowSizeCallback(window, window_size_callback);
+	glfwSetKeyCallback(platform->window, key_callback);
+	glfwSetCharCallback(platform->window, character_callback);
+	glfwSetCursorPosCallback(platform->window, cursor_position_callback);
+	glfwSetMouseButtonCallback(platform->window, mouse_button_callback);
+	glfwSetScrollCallback(platform->window, scroll_callback);
+	glfwSetWindowSizeCallback(platform->window, window_size_callback);

-	glfwMakeContextCurrent(window);
+	glfwMakeContextCurrent(platform->window);
+	#ifndef __EMSCRIPTEN__
 	gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
 	glfwSwapInterval(0);
+	#endif
 #endif

 	App* app = new MAIN_CLASS();
@@ -156,25 +194,14 @@ int main(void) {
 	g_app->init(appContext);
 	g_app->setSize(appContext.platform->getScreenWidth(), appContext.platform->getScreenHeight());

+#ifdef __EMSCRIPTEN__
+	emscripten_set_main_loop(loop, 0, 1);
+#else
 	// Main event loop
-	using clock = std::chrono::steady_clock;
-	while(!glfwWindowShouldClose(window) && !app->wantToQuit()) {
-		auto frameStart = clock::now();
-
-		app->update();
-
-		glfwSwapBuffers(window);
-		glfwPollEvents();
-
-		glfwSwapInterval(((MAIN_CLASS*)app)->options.getBooleanValue(OPTIONS_VSYNC) ? 1 : 0);
-		if(((MAIN_CLASS*)app)->options.getBooleanValue(OPTIONS_LIMIT_FRAMERATE)) {
-			auto frameEnd = clock::now();
-			auto elapsed = std::chrono::duration_cast<std::chrono::microseconds>(frameEnd - frameStart);
-			auto target = std::chrono::microseconds(33333); // ~30 fps
-			if(elapsed < target)
-				std::this_thread::sleep_for(target - elapsed);
-		}
+	while(!glfwWindowShouldClose(platform->window) && !app->wantToQuit()) {
+		loop();
 	}
+#endif

 	delete app;

@@ -184,7 +211,7 @@ int main(void) {
 	
 #ifndef STANDALONE_SERVER
 	// Exit.
-	glfwDestroyWindow(window);
+	glfwDestroyWindow(platform->window);
 	glfwTerminate();
 #endif

--- a/src/platform/CThread.cpp
+++ b/src/platform/CThread.cpp
@@ -25,7 +25,7 @@
 			&m_threadID        // pointer to receive thread ID
 		);
 	#endif
-	#if defined(__linux__) || defined(ANDROID) || defined(__APPLE__) || defined(POSIX)
+	#if defined(__linux__) || defined(ANDROID) || defined(__APPLE__) || defined(POSIX) || defined(__EMSCRIPTEN__)
 		mp_threadFunc = (pthread_fn)threadFunc;

 		pthread_attr_init(&m_attributes);
--- a/src/platform/CThread.h
+++ b/src/platform/CThread.h
@@ -13,7 +13,7 @@

 typedef void *( * pthread_fn )( void * );

-#if defined(__linux__) || defined(ANDROID) || defined(__APPLE__) || defined(POSIX)
+#if defined(__linux__) || defined(ANDROID) || defined(__APPLE__) || defined(POSIX) || defined(__EMSCRIPTEN__)
 	#include <pthread.h>
 	#include <unistd.h>

@@ -38,7 +38,7 @@ typedef void *( * pthread_fn )( void * );
 		DWORD						m_threadID;
 		HANDLE						m_threadHandle;
 	#endif
-	#if defined(__linux__) || defined(ANDROID) || defined(__APPLE__) || defined(POSIX)
+	#if defined(__linux__) || defined(ANDROID) || defined(__APPLE__) || defined(POSIX) || defined(__EMSCRIPTEN__)
 		pthread_fn					mp_threadFunc;
 		pthread_t					m_thread;
 		pthread_attr_t				m_attributes;