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annotate files.pde @ 200:dffdbdb4ded6

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Split mpSaveBinaryFile() into mpSaveBinaryBlob() for saving JavaScript Blobs, which is what mpSaveBinaryFile() converts given byte array into.
author Matti Hamalainen <ccr@tnsp.org>
date Wed, 29 Aug 2018 14:06:55 +0300
parents b36cfb497223
children c6c1dd769566
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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b36cfb497223 Move file related functions to files.pde
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1 boolean mpHaveLocalStorage()
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2 {
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3 var test = 'mpLSTest';
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4 try {
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5 localStorage.setItem(test, test);
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6 if (localStorage.getItem(test) == test)
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7 {
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8 localStorage.removeItem(test);
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9 return true;
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10 }
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11 }
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12 catch (e) {
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13 return false;
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14 }
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15 return false;
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16 }
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17
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18
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19 function mpLoadFileSelector(fmtname, fmtexts, fcallback)
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20 {
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21 var mpUI = stGE("mpUI");
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22 if (mpUI)
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23 {
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24 stClearChildren(mpUI);
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25 mpUI.style.background = "red";
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26 mpUI.style.padding = "0.5em";
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27
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28 mobj = stCE("input", "mpFileSelector");
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29 mobj.type = "file";
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30 mobj.name = "name";
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31 mobj.multiple = false;
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32
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33 if (fmtexts != null)
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34 mobj.accept = fmtexts;
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35
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36 stAddEventOb(mobj.name, mobj, "change",
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37 function(evt)
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38 {
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39 var files = evt.target.files;
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40 if (files.length > 0)
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41 {
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42 var freader = new FileReader();
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43
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44 freader.onloadend = (function(theFile) {
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45 fcallback(theFile, new Uint8Array(freader.result));
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46 });
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47
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48 freader.readAsArrayBuffer(files[0]);
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49 }
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50 stClearChildren(mpUI);
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51 mpUI.style.background = null;
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52 });
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53
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54 mpUI.appendChild(mobj);
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55
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56 mobj = stCE("span", "mpFileInfo");
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57 mobj.innerHTML = "Load / import an '<b>"+ fmtname +"</b>' file.";
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58 mpUI.appendChild(mobj);
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59 }
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60 else
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61 return null;
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62 }
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63
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64
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65 //
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66 // Basically the same as Processing loadBytes(), but it seems
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67 // that Processing.JS's loadBytes() is broken at least in v1.4.8
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68 // and does not return byte-clean data. So roll a replacement of
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69 // our own design. --ccr
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70 //
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71 byte[] mpLoadBinaryFile(String url)
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72 {
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73 var xhr = new XMLHttpRequest();
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74 xhr.open("GET", url, false);
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75 xhr.overrideMimeType("text/plain; charset=x-user-defined");
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76 xhr.setRequestHeader("If-Modified-Since", "Fri, 01 Jan 1960 00:00:00 GMT");
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77 xhr.send(null);
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78
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79 if (xhr.status !== 200 && xhr.status !== 0)
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80 return null;
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81
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82 var string = xhr.responseText;
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83 byte[] ret = new byte[string.length];
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84
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85 for (var i = 0; i < string.length; i++)
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86 {
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87 ret[i] = string.charCodeAt(i) & 0xff;
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88 }
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89
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90 return ret;
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91 }
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92
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93
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94 Blob mpMakeBinaryBlob(byte[] data)
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95 {
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96 var blob = null;
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97 if (data == null)
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98 return null;
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99
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100 if (typeof(data) == "string")
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101 blob = new Blob([data], {type: "application/octet-stream"});
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102 else
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103 if (typeof(data) == "object")
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104 blob = new Blob([new Uint8Array(data)], {type: "application/octet-stream"});
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105
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106 return blob;
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107 }
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108
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109
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110 //
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111 // "Save" a byte array to file. Basically creates a blob URI
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112 // and dumps it in the DOM, giving user a download.
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113 //
200
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114 boolean mpSaveBinaryBlob(String name, void blob)
195
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115 {
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116 var url = window.URL.createObjectURL(blob);
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117 if (url == null)
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118 {
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119 console.log("Could not create URL from BLOB object.");
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120 return false;
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121 }
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122
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123 var alink = stCE("a");
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124 var mpUI = stGE("mpUI");
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125 stClearChildren(mpUI);
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126 mpUI.appendChild(alink);
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127
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128 alink.style = "display: none";
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129 alink.href = url;
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130 alink.download = name;
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131 alink.click();
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132
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133 window.URL.revokeObjectURL(url);
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134 return true;
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135 }
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136
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137
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138 boolean mpSaveBinaryFile(String name, byte[] data)
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139 {
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140 var blob = mpMakeBinaryBlob(data);
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141 if (blob == null)
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142 {
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143 console.log("Could not create BLOB from data.");
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144 return false;
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145 }
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146
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147 return mpSaveBinaryBlob(name, blob);
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148 }
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149
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150
195
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151 // bordh/v = 64, 32, omag = 1
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152 void mpSavePNGImage(String name, int fmt, boolean border, int bordh, int bordv, int omag)
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153 {
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154 PImage simg = mpRenderImage(border, bordh, bordv, omag);
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155 // if (g_data[int('Q')] == 0)
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156
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157 if (simg !== null)
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158 {
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159 // XXX TODO .. actually save the image, something like ..
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160 //simg.canvas.toBlob(function(idata){ mpSaveBinaryFile(name, idata); }, "image/png", 0.95);
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161 }
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162 }
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163
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164
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165 int mpLoadPNGImage(String name)
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166 {
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167 PImage simg = null;
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168 if (simg == null)
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169 return -1;
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170
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171 int lefth = g_farge;
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172 int righth = g_backg;
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173 storeparameters();
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174
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175 g_data[int('d')] = 0;
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176 g_data[int('t')] = 0;
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177 g_data[int('b')] = 1; //old IQ
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178
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179 if (!mpImportFromImage(simg))
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180 return -2;
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181
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182 restoreparameters();
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183 refreshpalette();
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184 refresh();
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185 g_boxreconstruct = 2;
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186 selectcolor(0, lefth);
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187 selectcolor(1, righth);
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188 return 0;
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189 }
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190
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191
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192 byte[] mpGetNativeImage()
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193 {
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194 //save the picture page g_map[], make sure some essential parameters are correct
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195 g_map[3] = byte(g_machine);
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196 g_map[5] = byte(MX);
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197 g_map[7] = byte(MY);
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198
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199 return g_map;
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200 }
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201
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202
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203 int mpSetNativeImage(byte[] data, boolean noError)
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204 {
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205 if (data == null)
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206 return -1;
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207
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208 if (data[3] != g_machine && !noError)
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209 return -2;
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210
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211 store_undo();
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212
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213 g_map = data;
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214
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215 refreshpalette();
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216 consistency();
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217 g_farge = int(g_realfront);
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218 g_ofarge = g_farge;
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219 g_backg = int(g_realback);
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220 sussborder();
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221
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222 return 0;
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223 }
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224
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225
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226 int mpLoadNativeImage(String name, boolean noError)
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227 {
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228 return mpSetNativeImage(
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229 mpLoadBinaryFile(name), noError);
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230 }
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231
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232
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233 boolean mpLoadPalette(String fname)
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234 {
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235 if (g_map[13] != C64)
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236 {
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237 return false;
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238 }
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239
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240 byte fdata[] = mpLoadbinaryFile(fname);
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241 if (fdata == null ||
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242 fdata.length != 772 ||
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243 fdata[0x301] != byte(0x10) ||
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244 fdata[0x302] != byte(0xff) ||
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245 fdata[0x303] != byte(0xff))
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246 {
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247 return false;
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248 }
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249
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250 for (int n = 0; n < 16; n++)
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251 {
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252 makecolor(n,
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253 int(fdata[n * 3]),
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254 int(fdata[n * 3 + 1]),
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255 int(fdata[n * 3 + 2]));
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256 }
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257
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258 mpSetUIColors();
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259
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260 sussborder();
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261 refresh_all();
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262
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263 return true;
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264 }