Mercurial > MadButterfly
annotate nodejs/image_ldr.cc @ 1307:cfbc0f3e54e3
Add supporting for programmer defined prefix for data_monitor
author | Thinker K.F. Li <thinker@codemud.net> |
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date | Thu, 20 Jan 2011 00:34:08 +0800 |
parents | 586e50f82c1f |
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*- |
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2 // vim: sw=4:ts=8:sts=4 |
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3 /*! \file |
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4 * This file implements Javascript binding for img_ldr_t of MadButterfly. |
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5 */ |
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6 #include <v8.h> |
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7 |
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8 extern "C" { |
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9 #include "mb.h" |
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10 } |
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11 |
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12 #include "mbfly_njs.h" |
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13 |
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14 using namespace v8; |
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15 |
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16 #ifndef ASSERT |
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17 #define ASSERT(x) |
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18 #endif |
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19 |
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20 /*! \defgroup xnjsmb_img_ldr_js Javascript binding for image loader. |
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21 * \ingroup xnjsmb |
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22 * |
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23 * @{ |
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24 */ |
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25 |
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26 static Persistent<ObjectTemplate> img_data_temp; |
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27 |
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28 /*! \brief load() method of img_ldr Javascript objects. |
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29 */ |
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30 static Handle<Value> |
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31 xnjsmb_img_ldr_load(const Arguments &args) { |
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32 HandleScope scope; |
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33 int argc = args.Length(); |
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34 Handle<Object> self = args.This(); |
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35 char *img_id; |
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36 mb_img_ldr_t *img_ldr; |
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37 mb_img_data_t *img_data; |
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38 Handle<Object> img_data_obj; |
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39 |
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40 if(argc != 1) |
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41 THROW("Invalid number of arguments (!= 1)"); |
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42 if(!args[0]->IsString()) |
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43 THROW("Invalid argument type"); |
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44 |
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45 String::Utf8Value img_id_utf8(args[0]->ToString()); |
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46 img_id = *img_id_utf8; |
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47 img_ldr = (mb_img_ldr_t *)UNWRAP(self); |
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48 |
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49 img_data_obj = img_data_temp->NewInstance(); |
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50 ASSERT(img_data_obj); |
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51 |
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52 img_data = MB_IMG_LDR_LOAD(img_ldr, img_id); |
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53 if(img_data == NULL) |
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54 THROW("Can not load an image"); |
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55 WRAP(img_data_obj, img_data); |
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56 |
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57 scope.Close(img_data_obj); |
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58 |
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59 return img_data_obj; |
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60 } |
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61 |
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62 /*! \brief Constructor function of img_ldr Javascript objects. |
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63 */ |
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64 static Handle<Value> |
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65 xnjsmb_img_ldr(const Arguments &args) { |
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66 HandleScope scope; |
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67 int argc = args.Length(); |
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68 Handle<Object> self = args.This(); |
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69 char *path; |
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70 mb_img_ldr_t *img_ldr; |
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71 |
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72 if(argc != 1) |
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73 THROW("Invalid number of arguments (!= 1)"); |
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74 if(!args[0]->IsString()) |
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75 THROW("Invalid argument type"); |
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76 |
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77 String::Utf8Value pathutf8(args[0]->ToString()); |
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78 path = *pathutf8; |
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79 |
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80 img_ldr = simple_mb_img_ldr_new(path); |
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81 if(img_ldr == NULL) |
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82 THROW("Can not create an image loader"); |
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83 WRAP(self, img_ldr); |
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84 |
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85 return Null(); |
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86 } |
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87 |
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88 static Persistent<FunctionTemplate> xnjsmb_img_ldr_temp; |
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89 |
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90 static Handle<Value> |
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91 xnjsmb_img_ldr_new(const Arguments &args) { |
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92 HandleScope scope; |
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93 int argc = args.Length(); |
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94 Handle<Value> il_args[1]; |
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95 Handle<Object> img_ldr; |
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96 Handle<Function> func; |
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97 |
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98 if(argc != 1) |
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99 THROW("Invalid number of arguments (!= 1)"); |
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100 if(!args[0]->IsString()) |
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101 THROW("Invalid argument type"); |
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102 |
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103 il_args[0] = args[0]; |
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104 func = xnjsmb_img_ldr_temp->GetFunction(); |
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105 img_ldr = func->NewInstance(1, il_args); |
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106 |
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107 scope.Close(img_ldr); |
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108 return img_ldr; |
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109 } |
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110 |
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111 /* @} */ |
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112 |
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113 /*! \brief Initialize image loader. |
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114 * |
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115 * This function is called by init() in mbfly_njs.cc when the module |
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116 * being loaded. |
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117 */ |
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118 void |
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119 xnjsmb_img_ldr_init_mb_rt_temp(Handle<Object> rt_temp) { |
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120 HandleScope scope; |
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121 Handle<FunctionTemplate> img_ldr_temp; |
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122 Handle<FunctionTemplate> img_ldr_new_temp; |
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123 Handle<ObjectTemplate> ldr_inst_temp; |
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124 Handle<ObjectTemplate> ldr_proto_temp; |
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125 Handle<FunctionTemplate> img_ldr_load_temp; |
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126 Handle<ObjectTemplate> _img_data_temp; |
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127 |
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128 /* Setup object template for img_data_t object for Javascript */ |
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129 _img_data_temp = ObjectTemplate::New(); |
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130 _img_data_temp->SetInternalFieldCount(1); |
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131 img_data_temp = Persistent<ObjectTemplate>::New(_img_data_temp); |
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132 |
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133 /* Setup img_ldr class */ |
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134 img_ldr_temp = FunctionTemplate::New(xnjsmb_img_ldr); |
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135 img_ldr_temp->SetClassName(String::New("img_ldr")); |
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136 ldr_inst_temp = img_ldr_temp->InstanceTemplate(); |
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137 ldr_inst_temp->SetInternalFieldCount(1); |
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138 |
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139 /* Set method load() for img_ldr */ |
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140 ldr_proto_temp = img_ldr_temp->PrototypeTemplate(); |
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141 img_ldr_load_temp = FunctionTemplate::New(xnjsmb_img_ldr_load); |
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142 SET(ldr_proto_temp, "load", img_ldr_load_temp); |
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143 |
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144 xnjsmb_img_ldr_temp = Persistent<FunctionTemplate>::New(img_ldr_temp); |
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145 |
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146 /* Initialize img_ldr_new function */ |
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147 img_ldr_new_temp = FunctionTemplate::New(xnjsmb_img_ldr_new); |
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148 SET(rt_temp, "img_ldr_new", img_ldr_new_temp->GetFunction()); |
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149 } |