Add necessary GLES fixes and missing JS functions

libs/gfx/api/gles32/source/gl.cpp

@@ -803,10 +803,12 @@ namespace gl
 			if (!internal::glGetQueryiv) return false;
 			internal::glGetQueryObjectuiv = reinterpret_cast<void (*)(GLuint , GLenum , GLuint *)>(internal::get_proc_address("glGetQueryObjectuiv"));
 			if (!internal::glGetQueryObjectuiv) return false;
+#if !defined(__EMSCRIPTEN__)
 			internal::glUnmapBuffer = reinterpret_cast<GLboolean (*)(GLenum )>(internal::get_proc_address("glUnmapBuffer"));
 			if (!internal::glUnmapBuffer) return false;
 			internal::glGetBufferPointerv = reinterpret_cast<void (*)(GLenum , GLenum , void **)>(internal::get_proc_address("glGetBufferPointerv"));
 			if (!internal::glGetBufferPointerv) return false;
+#endif
 			internal::glDrawBuffers = reinterpret_cast<void (*)(GLsizei , const GLenum *)>(internal::get_proc_address("glDrawBuffers"));
 			if (!internal::glDrawBuffers) return false;
 			internal::glUniformMatrix2x3fv = reinterpret_cast<void (*)(GLint , GLsizei , GLboolean , const GLfloat *)>(internal::get_proc_address("glUniformMatrix2x3fv"));
@@ -827,10 +829,12 @@ namespace gl
 			if (!internal::glRenderbufferStorageMultisample) return false;
 			internal::glFramebufferTextureLayer = reinterpret_cast<void (*)(GLenum , GLenum , GLuint , GLint , GLint )>(internal::get_proc_address("glFramebufferTextureLayer"));
 			if (!internal::glFramebufferTextureLayer) return false;
+#if !defined(__EMSCRIPTEN__)
 			internal::glMapBufferRange = reinterpret_cast<void *(*)(GLenum , GLintptr , GLsizeiptr , GLbitfield )>(internal::get_proc_address("glMapBufferRange"));
 			if (!internal::glMapBufferRange) return false;
 			internal::glFlushMappedBufferRange = reinterpret_cast<void (*)(GLenum , GLintptr , GLsizeiptr )>(internal::get_proc_address("glFlushMappedBufferRange"));
 			if (!internal::glFlushMappedBufferRange) return false;
+#endif
 			internal::glBindVertexArray = reinterpret_cast<void (*)(GLuint )>(internal::get_proc_address("glBindVertexArray"));
 			if (!internal::glBindVertexArray) return false;
 			internal::glDeleteVertexArrays = reinterpret_cast<void (*)(GLsizei , const GLuint *)>(internal::get_proc_address("glDeleteVertexArrays"));
@@ -984,6 +988,10 @@ namespace gl
 			internal::glGetInternalformativ = reinterpret_cast<void (*)(GLenum , GLenum , GLenum , GLsizei , GLint *)>(internal::get_proc_address("glGetInternalformativ"));
 			if (!internal::glGetInternalformativ) return false;
 
+#if defined(__EMSCRIPTEN__)
+			return true;
+#endif
+
 			// OpenGL ES 3.1
 
 			internal::glDispatchCompute = reinterpret_cast<void (*)(GLuint , GLuint , GLuint )>(internal::get_proc_address("glDispatchCompute"));
@@ -1259,7 +1267,13 @@ namespace gl
 
 		int major_version(){ return 3; }
 
-		int minor_version(){ return 2; }
+		int minor_version(){
+#if defined(__EMSCRIPTEN__)
+			return 0;
+#else
+			return 2;
+#endif
+		}
 
 		bool has_extension(const char * name){ return extensions.contains(name); }
 
@@ -1269,6 +1283,16 @@ namespace gl
 
 		const char * shader_prefix()
 		{
+#if defined(__EMSCRIPTEN__)
+			return R"(#version 300 es
+
+precision highp int;
+precision highp float;
+precision highp sampler2D;
+precision highp usampler2D;
+
+)";
+#else
 			return R"(#version 320 es
 
 precision highp int;
@@ -1277,6 +1301,7 @@ precision highp sampler2D;
 precision highp usampler2D;
 
 )";
+#endif
 		}
 
 	} // namespace sys

package/CMakeLists.txt

@@ -24,6 +24,7 @@ if(PSEMEK_PACKAGE_MODE)
 
 	if(CMAKE_SYSTEM_NAME STREQUAL Emscripten)
 		list(APPEND PSEMEK_PACKAGE_LINK_FLAGS_RAW "-sMIN_WEBGL_VERSION=2" "-sNO_DISABLE_EXCEPTION_CATCHING")
+		list(APPEND PSEMEK_PACKAGE_LINK_FLAGS_RAW "-sDEFAULT_LIBRARY_FUNCS_TO_INCLUDE='$autoResumeAudioContext','$dynCall'")
 		if(CMAKE_BUILD_TYPE STREQUAL Debug)
 			list(APPEND PSEMEK_PACKAGE_LINK_FLAGS_RAW "-g")
 		endif()