add webgl support

src/pch.h

@@ -103,6 +103,24 @@
     #define __block
     #define BT_SetTerminate void
 
+#elif defined(EMSCRIPTEN)
+
+    #define GLFW_INCLUDE_ES3
+    #include <GLFW/glfw3.h>
+    #include <sys/stat.h>
+    #include <sys/types.h>
+    #include <dirent.h>
+
+    #define __WEB__ 1
+    #define SHADER_VERSION "#version 300 es\n"
+    #define PP_OS "web"
+    #define __GLES__ 1
+    #define __WEBGL__ 1
+    #define __block
+    #define BT_SetTerminate void
+
+    //#define GL_RGBA8 GL_RGBA
+
 #endif
 
 #define SIXPLETTE(I) {I, I, I, I, I, I}
@@ -155,5 +173,8 @@
 #include <stb/stb_truetype.h>
 #include <stb/stb_image.h>
 #include <stb/stb_image_write.h>
-#include <curl/curl.h>
 #include <sqlite3.h>
+
+#ifndef EMSCRIPTEN
+#include <curl/curl.h>
+#endif