From 8f2b80c7a8e57377e9f7ac6ec1875a6179cffb5e Mon Sep 17 00:00:00 2001
From: XProger <xproger@list.ru>
Date: Wed, 9 May 2018 20:42:52 +0300
Subject: [PATCH] #15 WebAssembly support

---
 src/cache.h                     |  5 +++-
 src/gapi_gl.h                   |  4 +--
 src/level.h                     |  5 ++--
 src/platform/web/.htaccess      |  7 ++++-
 src/platform/web/build_wasm.bat |  8 +++++
 src/platform/web/index.html     | 52 +++++++++++++++++++--------------
 src/shader.h                    |  4 ++-
 7 files changed, 56 insertions(+), 29 deletions(-)
 create mode 100644 src/platform/web/build_wasm.bat

diff --git a/src/cache.h b/src/cache.h
index 90803fa..a639207 100644
--- a/src/cache.h
+++ b/src/cache.h
@@ -208,6 +208,8 @@ struct ShaderCache {
     Shader *getShader(Core::Pass pass, Shader::Type type, int fx) {
         Shader *shader = shaders[pass][type][fx];
     #ifndef FFP
+        if (shader == NULL)
+            LOG("! NULL shader: %d %d %d\n", int(pass), int(type), int(fx));
         ASSERT(shader != NULL);
     #endif
         return shader;
@@ -217,7 +219,8 @@ struct ShaderCache {
         Core::pass = pass;
 
         Shader *shader = getShader(pass, type, fx);
-        shader->bind();
+        if (shader)
+            shader->bind();
 
         Core::setAlphaTest((fx & FX_ALPHA_TEST) != 0);
     }
diff --git a/src/gapi_gl.h b/src/gapi_gl.h
index f18ca03..682d4ff 100644
--- a/src/gapi_gl.h
+++ b/src/gapi_gl.h
@@ -923,10 +923,12 @@ namespace GAPI {
     }
 
     void setAlphaTest(bool enable) {
+    #ifdef FFP
         if (enable)
             glEnable(GL_ALPHA_TEST);
         else
             glDisable(GL_ALPHA_TEST);
+    #endif
     }
 
     void setCullMode(int rsMask) {
@@ -1014,10 +1016,8 @@ namespace GAPI {
         if (mask & RS_BLEND)
             setBlendMode(state & RS_BLEND);
 
-    #ifdef FFP
         if (mask & RS_DISCARD)
             setAlphaTest((state & RS_DISCARD) != 0);
-    #endif
     }
 }
 
diff --git a/src/level.h b/src/level.h
index f3b4e69..af8e28d 100644
--- a/src/level.h
+++ b/src/level.h
@@ -716,6 +716,8 @@ struct Level : IGame {
             inventory.toggle(0, Inventory::PAGE_OPTION);
         }
 
+        setClipParams(1.0f, NO_CLIP_PLANE);
+
         effect  = TR::Effect::NONE;
         cube360 = NULL;
 
@@ -2403,8 +2405,7 @@ struct Level : IGame {
             player = players[view];
             camera = player->camera;
 
-            params->clipHeight  = NO_CLIP_PLANE;
-            params->clipSign    = 1.0f;
+            setClipParams(1.0f, NO_CLIP_PLANE);
             params->waterHeight = params->clipHeight;
 
             if (shadow) {
diff --git a/src/platform/web/.htaccess b/src/platform/web/.htaccess
index 850df1b..0072e23 100644
--- a/src/platform/web/.htaccess
+++ b/src/platform/web/.htaccess
@@ -15,7 +15,12 @@ AddEncoding gzip .gz
   Header set Content-Encoding: gzip
 </FilesMatch>
 
+<FilesMatch "\.wasm\.gz$">
+  ForceType application/octet-stream
+  Header set Content-Encoding: gzip
+</FilesMatch>
+
 RewriteEngine on 
 RewriteCond %{HTTP:Accept-Encoding} gzip 
 RewriteCond %{REQUEST_FILENAME}.gz -f 
-RewriteRule ^(.+)\.(js|data|mem)$ $1.$2.gz [L] 
\ No newline at end of file
+RewriteRule ^(.+)\.(js|data|mem|wasm)$ $1.$2.gz [L] 
\ No newline at end of file
diff --git a/src/platform/web/build_wasm.bat b/src/platform/web/build_wasm.bat
new file mode 100644
index 0000000..e965de8
--- /dev/null
+++ b/src/platform/web/build_wasm.bat
@@ -0,0 +1,8 @@
+@echo off
+cls
+set SRC=main.cpp ../../libs/stb_vorbis/stb_vorbis.c ../../libs/tinf/tinflate.c
+set PROJ=OpenLara_wasm
+set FLAGS=-s WASM=1 -O3 -ffast-math -Wno-deprecated-register --llvm-opts 2 -fmax-type-align=2 -std=c++11 -Wall -I../../
+echo.
+call em++ %SRC% %FLAGS% -o %PROJ%.js --preload-file ./level/1/TITLE.PSX --preload-file ./audio/1/dummy --preload-file ./audio/2/dummy --preload-file ./audio/3/dummy --preload-file ./level/2/dummy --preload-file ./level/3/dummy 
+gzip.exe -9 -f %PROJ%.data %PROJ%.js %PROJ%.wasm %PROJ%.js.mem load-wasm-worker.js
\ No newline at end of file
diff --git a/src/platform/web/index.html b/src/platform/web/index.html
index 0a08be7..943aca7 100644
--- a/src/platform/web/index.html
+++ b/src/platform/web/index.html
@@ -85,7 +85,7 @@
 					var AudioContext = window.AudioContext || window.webkitAudioContext;
 					if (!AudioContext) return;
 					audioContext = new (window.AudioContext || window.webkitAudioContext)();
-					var count  = 2048;
+					var count  = 4096;
 					var rate   = 44100 / audioContext.sampleRate;
 					var framesCount = Math.ceil(count * rate);
 					var frames = Module._malloc(framesCount * 4); // interleaved short L, R
@@ -103,13 +103,14 @@
 					proc.connect(audioContext.destination);
 				}
 
-			// for iOS to unlock audio context after user interaction
+			// unlock audio context after user interaction
 				var userAction = function() {
-					if (audioContext) {
-						audioContext.resume();
-						window.removeEventListener('touchstart', userAction, false);
-						window.removeEventListener('click', userAction, false);
-						console.log("resume playback");
+					if (audioContext && audioContext.state == "suspended") {
+						audioContext.resume().then(function() {
+							window.removeEventListener('touchstart', userAction, false);
+							window.removeEventListener('click', userAction, false);
+							console.log("resume playback");
+                        });
 					}
 				};
 				window.addEventListener('touchstart', userAction, false);
@@ -133,26 +134,33 @@
 				<input type="button" value="Browse Level" onclick="document.getElementById('browseFile').click();" /> (.PHD, .PSX, .TR2)
 				<p style="margin:8px">
 				OpenLara on <a target="_blank" href="https://github.com/XProger/OpenLara">github</a> & <a target="_blank" href="https://www.facebook.com/OpenLaraTR">facebook</a><br>
-				<br><i>last update: 8.05.2018</i><br>
+				<br><i>last update: 9.05.2018</i><br>
 				</p>
 			</span>
 
 			<script>
-				(function() {
-					var memoryInitializer = 'OpenLara.js.mem';
-					if (typeof Module['locateFile'] === 'function') {
-						memoryInitializer = Module['locateFile'](memoryInitializer);
-					} else if (Module['memoryInitializerPrefixURL']) {
-						memoryInitializer = Module['memoryInitializerPrefixURL'] + memoryInitializer;
-					}
-					var xhr = Module['memoryInitializerRequest'] = new XMLHttpRequest();
-					xhr.open('GET', memoryInitializer, true);
-					xhr.responseType = 'arraybuffer';
-					xhr.send(null);
-				})();
-
 				var script = document.createElement('script');
-				script.src = "OpenLara.js";
+
+				if ('WebAssembly' in window) {
+					console.log("Start WebAssembly!");
+					script.src = "OpenLara_wasm.js";
+				} else {
+					console.log("Start asm.js!");
+					script.src = "OpenLara.js";
+					(function() {
+						var memoryInitializer = 'OpenLara.js.mem';
+						if (typeof Module['locateFile'] === 'function') {
+							memoryInitializer = Module['locateFile'](memoryInitializer);
+						} else if (Module['memoryInitializerPrefixURL']) {
+							memoryInitializer = Module['memoryInitializerPrefixURL'] + memoryInitializer;
+						}
+						var xhr = Module['memoryInitializerRequest'] = new XMLHttpRequest();
+						xhr.open('GET', memoryInitializer, true);
+						xhr.responseType = 'arraybuffer';
+						xhr.send(null);
+					})();
+				}
+
 				document.body.appendChild(script);
 
 				window.onbeforeunload = function () { // Ctrl+W
diff --git a/src/shader.h b/src/shader.h
index 5e75bfe..6b56568 100644
--- a/src/shader.h
+++ b/src/shader.h
@@ -133,7 +133,9 @@ struct Shader {
     }
 
     void init() {
-        bind();
+        Core::active.shader = this;
+        glUseProgram(ID);
+
         for (int st = 0; st < sMAX; st++) {
             GLint idx = glGetUniformLocation(ID, (GLchar*)SamplerName[st]);
             if (idx != -1)