# HG changeset patch
# User Thinker K.F. Li <thinker@branda.to>
# Date 1280146438 -28800
# Node ID dc32c1c140ae5bf719a8f21c7333c4ec6ad5f1d2
# Parent  683889344459b7f1fd1e6d5017c287c9d621ffa0
First compilable image loader binding for Javascript

diff -r 683889344459 -r dc32c1c140ae nodejs/image_ldr.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nodejs/image_ldr.cc	Mon Jul 26 20:13:58 2010 +0800
@@ -0,0 +1,111 @@
+/*! \file
+ * This file implements Javascript binding for img_ldr_t of MadButterfly.
+ */
+#include <v8.h>
+
+extern "C" {
+#include "mb.h"
+}
+
+#include "mbfly_njs.h"
+
+using namespace v8;
+
+#ifndef ASSERT
+#define ASSERT(x)
+#endif
+
+static Persistent<ObjectTemplate> img_data_temp;
+
+/*! \brief load() method of img_ldr Javascript objects.
+ */
+static Handle<Value>
+xnjsmb_img_ldr_load(const Arguments &args) {
+    HandleScope scope;
+    int argc = args.Length();
+    Handle<Object> self = args.This();
+    char *img_id;
+    mb_img_ldr_t *img_ldr;
+    mb_img_data_t *img_data;
+    Handle<Object> img_data_obj;
+
+    if(argc != 1)
+	THROW("Invalid number of arguments (!= 1)");
+    if(!args[0]->IsString())
+	THROW("Invalid argument type");
+
+    String::Utf8Value img_id_utf8(args[0]->ToString());
+    img_id = *img_id_utf8;
+    img_ldr = (mb_img_ldr_t *)UNWRAP(self);
+
+    img_data_obj = img_data_temp->NewInstance();
+    ASSERT(img_data_obj);
+    
+    img_data = MB_IMG_LDR_LOAD(img_ldr, img_id);
+    if(img_data == NULL)
+	THROW("Can not load an image");
+    WRAP(img_data_obj, img_data);
+
+    scope.Close(img_data_obj);
+    
+    return img_data_obj;
+}
+
+/*! \brief Constructor function of img_ldr Javascript objects.
+ */
+static Handle<Value>
+xnjsmb_img_ldr_new(const Arguments &args) {
+    HandleScope scope;
+    int argc = args.Length();
+    Handle<Object> self = args.This();
+    char *path;
+    mb_img_ldr_t *img_ldr;
+    
+    if(argc != 1)
+	THROW("Invalid number of arguments (!= 1)");
+    if(!args[0]->IsString())
+	THROW("Invalid argument type");
+    
+    String::Utf8Value pathutf8(args[0]->ToString());
+    path = *pathutf8;
+
+    img_ldr = simple_mb_img_ldr_new(path);
+    if(img_ldr == NULL)
+	THROW("Can not create an image loader");
+    WRAP(self, img_ldr);
+
+    return Null();
+}
+
+/*! \brief Initialize image loader.
+ *
+ * This function is called by init() in mbfly_njs.cc when the module
+ * being loaded.
+ */
+void
+xnjsmb_img_ldr_init_mb_rt_temp(Handle<Object> rt_temp) {
+    HandleScope scope;
+    Handle<FunctionTemplate> img_ldr_new_temp;
+    Handle<ObjectTemplate> ldr_inst_temp;
+    Handle<ObjectTemplate> ldr_proto_temp;
+    Handle<FunctionTemplate> img_ldr_load_temp;
+    Handle<ObjectTemplate> _img_data_temp;
+
+    /* Setup object template for img_data_t object for Javascript */
+    _img_data_temp = ObjectTemplate::New();
+    _img_data_temp->SetInternalFieldCount(1);
+    img_data_temp = Persistent<ObjectTemplate>::New(_img_data_temp);
+    
+    /* Setup img_ldr class */
+    img_ldr_new_temp = FunctionTemplate::New(xnjsmb_img_ldr_new);
+    img_ldr_new_temp->SetClassName(String::New("img_ldr"));
+    ldr_inst_temp = img_ldr_new_temp->InstanceTemplate();
+    ldr_inst_temp->SetInternalFieldCount(1);
+
+    /* Set method load() for img_ldr */
+    ldr_proto_temp = img_ldr_new_temp->PrototypeTemplate();
+    img_ldr_load_temp = FunctionTemplate::New(xnjsmb_img_ldr_load);
+    SET(ldr_proto_temp, "load", img_ldr_load_temp);
+    
+    SET(rt_temp, "img_ldr_new", img_ldr_new_temp->GetFunction());
+}
diff -r 683889344459 -r dc32c1c140ae nodejs/mbfly_njs.cc
--- a/nodejs/mbfly_njs.cc	Mon Jul 26 09:50:44 2010 +0800
+++ b/nodejs/mbfly_njs.cc	Mon Jul 26 20:13:58 2010 +0800
@@ -148,7 +148,7 @@
     xnjsmb_shapes_init_mb_rt_temp(mb_rt_func);
     xnjsmb_paints_init_mb_rt_temp(mb_rt_func);
     xnjsmb_font_init_mb_rt_temp(mb_rt_func);
-    xnjsmb_img_ldr_init_mb_rt_temp(mb_rt_func);
+    xnjsmb_img_ldr_init_mb_rt_temp(target);
     
     target->Set(String::New("mb_rt"), mb_rt_func->GetFunction());    
 }
diff -r 683889344459 -r dc32c1c140ae nodejs/mbfly_njs.h
--- a/nodejs/mbfly_njs.h	Mon Jul 26 09:50:44 2010 +0800
+++ b/nodejs/mbfly_njs.h	Mon Jul 26 20:13:58 2010 +0800
@@ -34,6 +34,6 @@
 
 /* From image_ldr.cc */
 void
-xnjsmb_img_ldr_init_mb_rt_temp(v8::Handle<v8::FunctionTemplate> mb_rt_temp);
+xnjsmb_img_ldr_init_mb_rt_temp(v8::Handle<v8::Object> mb_rt_temp);
 
 #endif /* __MBFLY_NJS_H_ */