Mercurial > MadButterfly

annotate nodejs/paints.cc @ 776:77b561bb7929

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Implement new algorithm to calculate the origin of the SVG elemnts so that we can implement object resize without changing the position of the object. However, the image does not work here since it does not use the transformation of the group.
author wycc
date Mon, 30 Aug 2010 08:56:44 +0800
parents 01b514800fbe
children 586e50f82c1f
rev   line source
567
a12c3448afb6 Add dummy paint_color templates
Thinker K.F. Li <thinker@branda.to>
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diff changeset
1 #include <v8.h>
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2
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3 extern "C" {
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4 #include "mb.h"
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5 }
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6
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7 #include "mbfly_njs.h"
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8
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9 using namespace v8;
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10
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11 #ifndef ASSERT
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12 #define ASSERT(x)
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13 #endif
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14
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15 /*! \defgroup xnjsmb_paints JS binding for paints
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16 * \ingroup xnjsmb
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17 *
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18 * @{
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19 */
567
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20
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a49358b040b5 Doc on how to manage life-cycle of paints for JS
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21 /*! \page paint_gc How to manage life-cycle of paints?
a49358b040b5 Doc on how to manage life-cycle of paints for JS
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22 *
a49358b040b5 Doc on how to manage life-cycle of paints for JS
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23 * A paint is used to fill and stroke shapes. It should keep live
a49358b040b5 Doc on how to manage life-cycle of paints for JS
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24 * before all shapes being stroked/or filled by it are dead or
a49358b040b5 Doc on how to manage life-cycle of paints for JS
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25 * filled/stroked by other paints. So, every shape that uses a paint
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26 * should keep a reference to the paint. The reference are removed
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27 * when a shape is filled/or stroked by other paints.
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28 *
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29 * A paint should keep a weak reference to itself. It is used to free
a49358b040b5 Doc on how to manage life-cycle of paints for JS
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30 * resource before it being collected.
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31 */
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32 static void
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33 xnjsmb_paint_recycle(Persistent<Value> obj, void *parameter) {
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34 Persistent<Object> *paint_hdl = (Persistent<Object> *)parameter;
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35 paint_t *paint;
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36 Handle<Object> rt;
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37 redraw_man_t *rdman;
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38 int r;
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39
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40 paint = (paint_t *)UNWRAP(*paint_hdl);
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41 rt = GET(*paint_hdl, "mbrt")->ToObject();
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42 rdman = xnjsmb_rt_rdman(rt);
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43
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44 r = rdman_paint_free(rdman, paint);
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45 ASSERT(r == 0);
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46
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47 paint_hdl->Dispose();
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48 delete paint_hdl;
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49 }
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50
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51 static void
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52 xnjsmb_paint_mod(Handle<Object> self, void *paint) {
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53 Persistent<Object> *paint_hdl;
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54
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55 paint_hdl = new Persistent<Object>();
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56 *paint_hdl = Persistent<Object>::New(self);
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57
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58 paint_hdl->MakeWeak(paint_hdl, xnjsmb_paint_recycle);
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59 }
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60
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61 static void
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62 xnjsmb_paint_fill(paint_t *paint, Handle<Object> self, shape_t *sh) {
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63 Handle<Value> rt_v;
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64 Handle<Object> rt_o;
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65 Handle<Object> sh_o;
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66 redraw_man_t *rdman;
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67
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68 rt_v = GET(self, "mbrt");
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69 rt_o = rt_v->ToObject();
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70 rdman = xnjsmb_rt_rdman(rt_o);
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71
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72 rdman_paint_fill(rdman, paint, sh);
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73
576
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74 if(sh_get_coord(sh))
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75 rdman_shape_changed(rdman, sh);
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76
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77 sh_o = *(Persistent<Object> *)mb_prop_get(&sh->obj.props, PROP_JSOBJ);
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78 SET(sh_o, "_fill_by", self);
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79 }
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80
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81 static void
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82 xnjsmb_paint_stroke(paint_t *paint, Handle<Object> self, shape_t *sh) {
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83 Handle<Value> rt_v;
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84 Handle<Object> rt_o;
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85 Handle<Object> sh_o;
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86 redraw_man_t *rdman;
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87
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88 rt_v = GET(self, "mbrt");
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89 rt_o = rt_v->ToObject();
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90 rdman = xnjsmb_rt_rdman(rt_o);
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91
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92 rdman_paint_stroke(rdman, paint, sh);
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93
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94 if(sh_get_coord(sh))
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95 rdman_shape_changed(rdman, sh);
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96
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97 sh_o = *(Persistent<Object> *)mb_prop_get(&sh->obj.props, PROP_JSOBJ);
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98 SET(sh_o, "_stroke_by", self);
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99 }
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100
699
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101 static void
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102 xnjsmb_paint_color_set_color(paint_t *paint, Handle<Object> self,
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103 float r, float g, float b, float a) {
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104 Handle<Value> rt_v;
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105 Handle<Object> rt_o;
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106 redraw_man_t *rdman;
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107
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108 rt_v = GET(self, "mbrt");
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109 rt_o = rt_v->ToObject();
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110 rdman = xnjsmb_rt_rdman(rt_o);
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111
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112 paint_color_set(paint, r, g, b, a);
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113
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114 rdman_paint_changed(rdman, paint);
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115 }
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116
733
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117 /*! \brief Set stops for linear paint for Javascript code.
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118 */
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119 static void
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120 xnjsmb_paint_linear_set_stops(paint_t *paint, Handle<Value> stops) {
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121 Array *stops_o;
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122 Array *stop_o;
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123 int nstops;
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124 grad_stop_t *grad_stops, *old_grad_stops;
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125 int i;
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126
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127 stops_o = Array::Cast(*stops);
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128 nstops = stops_o->Length();
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129 grad_stops = (grad_stop_t *)malloc(sizeof(grad_stop_t) * nstops);
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130 ASSERT(grad_stops != NULL);
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131
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132 for(i = 0; i < nstops; i++) {
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133 stop_o = Array::Cast(*stops_o->Get(i));
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134 ASSERT(stop_o->Length() == 5);
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135 grad_stop_init(grad_stops + i,
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136 stop_o->Get(0)->ToNumber()->Value(), /* off */
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137 stop_o->Get(1)->ToNumber()->Value(), /* r */
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138 stop_o->Get(2)->ToNumber()->Value(), /* g */
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139 stop_o->Get(3)->ToNumber()->Value(), /* b */
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140 stop_o->Get(4)->ToNumber()->Value()); /* a */
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141 }
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142
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143 old_grad_stops = paint_linear_stops(paint, nstops, grad_stops);
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144 if(old_grad_stops)
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145 free(old_grad_stops); /* The stops, here, were allocated for
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146 * previous calling of this
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147 * function. */
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148 }
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149
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150 /*! \brief Set stops for radial paint for Javascript code.
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151 */
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152 static void
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153 xnjsmb_paint_radial_set_stops(paint_t *paint, Handle<Value> stops) {
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154 Array *stops_o;
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155 Array *stop_o;
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156 int nstops;
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157 grad_stop_t *grad_stops, *old_grad_stops;
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158 int i;
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159
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160 stops_o = Array::Cast(*stops);
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161 nstops = stops_o->Length();
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162 grad_stops = (grad_stop_t *)malloc(sizeof(grad_stop_t) * nstops);
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163 ASSERT(grad_stops != NULL);
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164
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165 for(i = 0; i < nstops; i++) {
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166 stop_o = Array::Cast(*stops_o->Get(i));
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167 ASSERT(stop_o->Length() == 5);
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168 grad_stop_init(grad_stops + i,
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169 stop_o->Get(0)->ToNumber()->Value(), /* off */
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170 stop_o->Get(1)->ToNumber()->Value(), /* r */
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171 stop_o->Get(2)->ToNumber()->Value(), /* g */
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172 stop_o->Get(3)->ToNumber()->Value(), /* b */
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173 stop_o->Get(4)->ToNumber()->Value()); /* a */
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174 }
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175
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176 old_grad_stops = paint_radial_stops(paint, nstops, grad_stops);
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177 if(old_grad_stops)
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178 free(old_grad_stops); /* The stops, here, were allocated for
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179 * previous calling of this
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180 * function. */
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181 }
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182
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183 #include "paints-inc.h"
568
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184
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185 /*! \defgroup xnjsmb_paints_cons Constructor of paints
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186 *
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187 * @{
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188 */
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189 paint_t *
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190 xnjsmb_paint_color_new(njs_runtime_t *rt,
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191 float r, float g, float b, float a,
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192 const char **err) {
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193 paint_t *paint;
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194 redraw_man_t *rdman;
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195
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196 rdman = X_njs_MB_rdman(rt);
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197 paint = rdman_paint_color_new(rdman, r, g, b, a);
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198 if(paint == NULL) {
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199 *err = "can not allocate a paint_color_t";
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200 return NULL;
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201 }
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202
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203 return paint;
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204 }
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205
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206 paint_t *
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207 xnjsmb_paint_image_new(njs_runtime_t *rt, mb_img_data_t *img,
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208 const char **err) {
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209 paint_t *paint;
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210 redraw_man_t *rdman;
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211
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212 rdman = X_njs_MB_rdman(rt);
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213 paint = rdman_paint_image_new(rdman, img);
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214 if(paint == NULL) {
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215 *err = "can not allocate a paint_image_t";
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216 return NULL;
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217 }
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218
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219 return paint;
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220 }
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221
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222 paint_t *
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223 xnjsmb_paint_linear_new(njs_runtime_t *rt,
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224 float x1, float y1, float x2, float y2,
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225 const char **err) {
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226 paint_t *paint;
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227 redraw_man_t *rdman;
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228
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229 rdman = X_njs_MB_rdman(rt);
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230 paint = rdman_paint_linear_new(rdman, x1, y1, x2, y2);
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231 if(paint == NULL) {
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232 *err = "can not allocate a paint_linear_t";
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233 return NULL;
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234 }
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235
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236 return paint;
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237 }
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238
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diff changeset
239 paint_t *
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240 xnjsmb_paint_radial_new(njs_runtime_t *rt,
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diff changeset
241 float cx, float cy, float r,
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diff changeset
242 const char **err) {
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diff changeset
243 paint_t *paint;
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244 redraw_man_t *rdman;
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245
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246 rdman = X_njs_MB_rdman(rt);
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247 paint = rdman_paint_radial_new(rdman, cx, cy, r);
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248 if(paint == NULL) {
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249 *err = "can not allocate a paint_radial_t";
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250 return NULL;
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251 }
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252
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253 return paint;
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254 }
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255
687
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256 /* @} */
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257
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258 /*! \defgroup xnjsmb_paints_export Exported wrapper maker for paints
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259 *
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260 * These functions are used by MB runtime to wrap C paints to JS
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261 * objects.
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262 *
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263 * @{
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264 */
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265 Handle<Value>
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266 export_xnjsmb_auto_paint_color_new(paint_t *paint) {
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267 Handle<Value> ret;
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268
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269 ret = xnjsmb_auto_paint_color_new(paint);
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270
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271 return ret;
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272 }
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273
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274 Handle<Value>
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275 export_xnjsmb_auto_paint_image_new(paint_t *paint) {
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276 Handle<Value> ret;
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277
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278 ret = xnjsmb_auto_paint_image_new(paint);
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279
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280 return ret;
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281 }
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282
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283 Handle<Value>
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284 export_xnjsmb_auto_paint_linear_new(paint_t *paint) {
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285 Handle<Value> ret;
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286
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287 ret = xnjsmb_auto_paint_linear_new(paint);
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288
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289 return ret;
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290 }
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291
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292 Handle<Value>
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293 export_xnjsmb_auto_paint_radial_new(paint_t *paint) {
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294 Handle<Value> ret;
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295
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296 ret = xnjsmb_auto_paint_radial_new(paint);
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297
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298 return ret;
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299 }
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300 /* @} */
567
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301
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302 /*! \brief Initialize paints for mbfly.
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303 *
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304 * This function is called by init() in mbfly_njs.cc when the module
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305 * being loaded.
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306 */
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307 void xnjsmb_paints_init_mb_rt_temp(Handle<FunctionTemplate> rt_temp) {
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308 static int init_flag = 0;
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309 Handle<ObjectTemplate> rt_proto_temp;
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310
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311 if(!init_flag) {
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312 xnjsmb_auto_paint_init();
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313 xnjsmb_auto_paint_color_init();
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314 xnjsmb_auto_paint_image_init();
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315 xnjsmb_auto_paint_linear_init();
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316 xnjsmb_auto_paint_radial_init();
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317
567
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318 init_flag = 1;
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319 }
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320 }
684
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321
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322 /* @} */