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Add JavaScript eval interface

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This commit is contained in:
eska 2016-04-11 23:22:14 +02:00
parent 016be49e08
commit 913361928f
6 changed files with 242 additions and 2 deletions
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3
platform/javascript/SCsub
View File

@ -4,7 +4,8 @@ javascript_files = [
"os_javascript.cpp",
"audio_driver_javascript.cpp",
"javascript_main.cpp",
"audio_server_javascript.cpp"
"audio_server_javascript.cpp",
"javascript_eval.cpp"
]
#obj = env.SharedObject('godot_javascript.cpp')

7
platform/javascript/detect.py
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@ -18,7 +18,8 @@ def can_build():
def get_opts():
return [
['compress','Compress JS Executable','no']
['compress','Compress JS Executable','no'],
['javascript_eval','Enable JavaScript eval interface','yes']
]
def get_flags():
@ -86,6 +87,10 @@ def configure(env):
env.Append(CPPFLAGS=['-s','ASM_JS=1'])
env.Append(CPPFLAGS=['-s','FULL_ES2=1'])
# env.Append(CPPFLAGS=['-DANDROID_ENABLED', '-DUNIX_ENABLED','-DMPC_FIXED_POINT'])
if env['javascript_eval'] == 'yes':
env.Append(CPPFLAGS=['-DJAVASCRIPT_EVAL_ENABLED'])
if (env["compress"]=="yes"):
lzma_binpath = em_path+"/third_party/lzma.js/lzma-native"
lzma_decoder = em_path+"/third_party/lzma.js/lzma-decoder.js"

169
platform/javascript/javascript_eval.cpp Normal file
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@ -0,0 +1,169 @@
/*************************************************************************/
/* javascript_eval.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifdef JAVASCRIPT_EVAL_ENABLED
#include "javascript_eval.h"
#include "emscripten.h"
JavaScript *JavaScript::singleton=NULL;
JavaScript *JavaScript::get_singleton() {
return singleton;
}
Variant JavaScript::eval(const String& p_code, bool p_use_global_exec_context) {
union { int i; double d; char* s; } js_data[4];
Variant::Type return_type = static_cast<Variant::Type>(EM_ASM_INT({
var eval_ret;
try {
if ($3) { // p_use_global_exec_context
// indirect eval call grants global execution context
var global_eval = eval;
eval_ret = global_eval(UTF8ToString($2));
}
else {
eval_ret = eval(UTF8ToString($2));
}
} catch (e) {
Module.printErr(e);
eval_ret = null;
}
switch (typeof eval_ret) {
case 'boolean':
// bitwise op yields 32-bit int
setValue($0, eval_ret|0, 'i32');
return 1; // BOOL
case 'number':
if ((eval_ret|0)===eval_ret) {
setValue($0, eval_ret|0, 'i32');
return 2; // INT
}
setValue($0, eval_ret, 'double');
return 3; // REAL
case 'string':
var array_len = lengthBytesUTF8(eval_ret)+1;
var array_ptr = _malloc(array_len);
try {
if (array_ptr===0) {
throw new Error('String allocation failed (probably out of memory)');
}
setValue($0, array_ptr|0 , '*');
stringToUTF8(eval_ret, array_ptr, array_len);
return 4; // STRING
} catch (e) {
if (array_ptr!==0) {
_free(array_ptr)
}
Module.printErr(e);
// fall through
}
break;
case 'object':
if (eval_ret === null) {
break;
}
else if (typeof eval_ret.x==='number' && typeof eval_ret.y==='number') {
setValue($0, eval_ret.x, 'double');
setValue($0+$1, eval_ret.y, 'double');
if (typeof eval_ret.z==='number') {
setValue($0+$1*2, eval_ret.z, 'double');
return 7; // VECTOR3
}
else if (typeof eval_ret.width==='number' && typeof eval_ret.height==='number') {
setValue($0+$1*2, eval_ret.width, 'double');
setValue($0+$1*3, eval_ret.height, 'double');
return 6; // RECT2
}
return 5; // VECTOR2
}
else if (typeof eval_ret.r==='number' && typeof eval_ret.g==='number' && typeof eval_ret.b==='number') {
// assume 8-bit rgb components since we're on the web
setValue($0, eval_ret.r, 'double');
setValue($0+$1, eval_ret.g, 'double');
setValue($0+$1*2, eval_ret.b, 'double');
setValue($0+$1*3, typeof eval_ret.a==='number' ? eval_ret.a : 1, 'double');
return 14; // COLOR
}
break;
}
return 0; // NIL
}, js_data, sizeof *js_data, p_code.utf8().get_data(), p_use_global_exec_context));
switch(return_type) {
case Variant::BOOL:
return !!js_data->i;
case Variant::INT:
return js_data->i;
case Variant::REAL:
return js_data->d;
case Variant::STRING:
{
String str = String::utf8(js_data->s);
EM_ASM_({ _free($0); }, js_data->s);
return str;
}
case Variant::VECTOR2:
return Vector2(js_data[0].d, js_data[1].d);
case Variant::VECTOR3:
return Vector3(js_data[0].d, js_data[1].d, js_data[2].d);
case Variant::RECT2:
return Rect2(js_data[0].d, js_data[1].d, js_data[2].d, js_data[3].d);
case Variant::COLOR:
return Color(js_data[0].d/255., js_data[1].d/255., js_data[2].d/255., js_data[3].d);
}
return Variant();
}
void JavaScript::_bind_methods() {
ObjectTypeDB::bind_method(_MD("eval", "code", "use_global_execution_context"), &JavaScript::eval, false);
}
JavaScript::JavaScript() {
ERR_FAIL_COND(singleton != NULL);
singleton = this;
}
JavaScript::~JavaScript() {
}
#endif // JAVASCRIPT_EVAL_ENABLED

55
platform/javascript/javascript_eval.h Normal file
View File

@ -0,0 +1,55 @@
/*************************************************************************/
/* javascript_eval.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifdef JAVASCRIPT_EVAL_ENABLED
#ifndef JAVASCRIPT_EVAL_H
#define JAVASCRIPT_EVAL_H
#include "object.h"
class JavaScript : public Object {
private:
OBJ_TYPE( JavaScript, Object );
static JavaScript *singleton;
protected:
static void _bind_methods();
public:
Variant eval(const String& p_code, bool p_use_global_exec_context = false);
static JavaScript *get_singleton();
JavaScript();
~JavaScript();
};
#endif // JAVASCRIPT_EVAL_H
#endif // JAVASCRIPT_EVAL_ENABLED

5
platform/javascript/os_javascript.cpp
View File

@ -230,6 +230,11 @@ void OS_JavaScript::initialize(const VideoMode& p_desired,int p_video_driver,int
if (result!=EMSCRIPTEN_RESULT_SUCCESS) {
ERR_PRINTS( "Error while setting Emscripten gamepaddisconnected callback: Code " + itos(result) );
}
#ifdef JAVASCRIPT_EVAL_ENABLED
javascript_eval = memnew(JavaScript);
Globals::get_singleton()->add_singleton(Globals::Singleton("JavaScript", javascript_eval));
#endif
}
void OS_JavaScript::set_main_loop( MainLoop * p_main_loop ) {

5
platform/javascript/os_javascript.h
View File

@ -42,6 +42,7 @@
#include "audio_driver_javascript.h"
#include "main/input_default.h"
#include "emscripten/html5.h"
#include "javascript_eval.h"
typedef void (*GFXInitFunc)(void *ud,bool gl2,int w, int h, bool fs);
typedef int (*OpenURIFunc)(const String&);
@ -88,6 +89,10 @@ private:
GetDataDirFunc get_data_dir_func;
GetLocaleFunc get_locale_func;
#ifdef JAVASCRIPT_EVAL_ENABLED
JavaScript* javascript_eval;
#endif
static void _close_notification_funcs(const String& p_file,int p_flags);
void process_joysticks();