Mercurial > projects > dwt-mac
annotate dwt/dnd/ImageTransfer.d @ 0:380af2bdd8e5
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author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Sat, 09 Aug 2008 17:00:02 +0200 |
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children | 1a8b3cb347e0 |
rev | line source |
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0
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1 /******************************************************************************* |
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2 * Copyright (c) 2007 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
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7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 * Outhink - support for typeFileURL |
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11 *******************************************************************************/ |
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12 module dwt.dnd; |
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13 |
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14 import dwt.DWT; |
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15 import dwt.graphics.*; |
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16 import dwt.internal.carbon.*; |
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17 import dwt.widgets.*; |
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18 |
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19 /** |
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20 * The class <code>ImageTransfer</code> provides a platform specific mechanism |
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21 * for converting an Image represented as a java <code>ImageData</code> to a |
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22 * platform specific representation of the data and vice versa. The |
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23 * <code>ImageData</code> contains infomration about the Image. See |
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24 * <code>Transfer</code> for additional information. |
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25 * |
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26 * <p> |
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27 * An example of a java <code>Image</code> containing an ImageData is shown |
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28 * below: |
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29 * </p> |
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30 * |
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31 * <code><pre> |
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32 * Image image = new Image(display, fileName); |
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33 * ImageData imgData = image.getImageData(); |
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34 * </code></pre> |
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35 */ |
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36 public class ImageTransfer : ByteArrayTransfer { |
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37 |
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38 static ImageTransfer _instance = new ImageTransfer(); |
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39 static final String PICT = "PICT"; //$NON-NLS-1$ |
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40 static final String TIFF = "TIFF"; //$NON-NLS-1$ |
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41 static final int PICTID = registerType(PICT); |
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42 static final int TIFFID = registerType(TIFF); |
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43 |
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44 ImageTransfer() { |
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45 } |
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46 |
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47 /** |
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48 * Returns the singleton instance of the ImageTransfer class. |
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49 * |
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50 * @return the singleton instance of the ImageTransfer class |
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51 */ |
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52 public static ImageTransfer getInstance() { |
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53 return _instance; |
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54 } |
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55 |
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56 /** |
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57 * This implementation of <code>javaToNative</code> converts an ImageData |
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58 * object represented by a java <code>ImageData</code> to a platform |
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59 * specific representation. For additional information see |
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60 * <code>Transfer#javaToNative</code>. |
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61 * |
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62 * @param object |
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63 * a java <code>ImageData</code> |
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64 * @param transferData |
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65 * an empty <code>TransferData</code> object; this object will |
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66 * be filled in on return with the platform specific format of |
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67 * the data |
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68 */ |
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69 public void javaToNative(Object object, TransferData transferData) { |
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70 if (!checkImage(object) || !isSupportedType(transferData)) { |
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71 DND.error(DND.ERROR_INVALID_DATA); |
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72 } |
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73 transferData.result = -1; |
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74 |
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75 ImageData imgData = (ImageData) object; |
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76 Image image = new Image(Display.getCurrent(), imgData); |
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77 int handle = image.handle; |
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78 int width = OS.CGImageGetWidth(handle); |
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79 int height = OS.CGImageGetHeight(handle); |
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80 int alphaInfo = OS.CGImageGetAlphaInfo(handle); |
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81 int bpr = OS.CGImageGetBytesPerRow(handle); |
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82 |
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83 Rect rect = new Rect(); |
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84 rect.left = 0; |
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85 rect.top = 0; |
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86 rect.right = (short) width; |
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87 rect.bottom = (short) height; |
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88 |
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89 int[] gWorld = new int[1]; |
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90 int format = OS.k24RGBPixelFormat; |
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91 if (alphaInfo !is OS.kCGImageAlphaNoneSkipFirst) { |
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92 format = OS.k32ARGBPixelFormat; |
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93 } |
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94 OS.NewGWorldFromPtr(gWorld, format, rect, 0, 0, 0, image.data, bpr); |
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95 int[] curPort = new int[1]; |
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96 int[] curGWorld = new int[1]; |
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97 OS.GetGWorld(curPort, curGWorld); |
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98 OS.SetGWorld(gWorld[0], curGWorld[0]); |
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99 int pictHandle = OS.OpenPicture(rect); |
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100 int portBitMap = OS.GetPortBitMapForCopyBits(gWorld[0]); |
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101 OS.CopyBits(portBitMap, portBitMap, rect, rect, (short) OS.srcCopy, 0); |
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102 OS.ClosePicture(); |
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103 OS.SetGWorld(curPort[0], curGWorld[0]); |
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104 OS.DisposeGWorld(gWorld[0]); |
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105 int length = OS.GetHandleSize(pictHandle); |
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106 OS.HLock(pictHandle); |
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107 int[] buffer = new int[1]; |
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108 OS.memmove(buffer, pictHandle, 4); |
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109 byte[] pictData = new byte[length]; |
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110 OS.memmove(pictData, buffer[0], length); |
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111 OS.HUnlock(pictHandle); |
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112 OS.KillPicture(pictHandle); |
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113 image.dispose(); |
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114 |
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115 transferData.data = new byte[][] { pictData }; |
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116 transferData.result = OS.noErr; |
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117 } |
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118 |
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119 /** |
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120 * This implementation of <code>nativeToJava</code> converts a platform |
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121 * specific representation of an ImageData <code>ImageData</code>. For |
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122 * additional information see <code>Transfer#nativeToJava</code>. |
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123 * |
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124 * @param transferData |
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125 * the platform specific representation of the data to be been |
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126 * converted |
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127 * @return a java <code>ImageData</code> object if the conversion was |
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128 * successful; otherwise null |
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129 */ |
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130 public Object nativeToJava(TransferData transferData) { |
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131 if (!isSupportedType(transferData) || transferData.data is null) |
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132 return null; |
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133 if (transferData.data.length is 0) |
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134 return null; |
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135 byte[] dataArr = transferData.data[0]; |
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136 int size = dataArr.length; |
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137 int pictPtr = OS.NewPtr(size); |
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138 OS.memmove(pictPtr, dataArr, size); |
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139 int dataProvider = OS.CGDataProviderCreateWithData(0, pictPtr, size, 0); |
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140 if (dataProvider !is 0) { |
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141 int pictDataRef = OS.QDPictCreateWithProvider(dataProvider); |
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142 // get bounds for the image |
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143 CGRect rect = new CGRect(); |
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144 OS.QDPictGetBounds(pictDataRef, rect); |
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145 int width = (int) rect.width; |
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146 int height = (int) rect.height; |
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147 |
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148 /* Create the image */ |
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149 int bpr = width * 4; |
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150 int dataSize = height * bpr; |
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151 int data = OS.NewPtr(dataSize); |
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152 if (data is 0) |
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153 DWT.error(DWT.ERROR_NO_HANDLES); |
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154 int provider = OS |
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155 .CGDataProviderCreateWithData(0, data, dataSize, 0); |
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156 if (provider is 0) { |
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157 OS.DisposePtr(data); |
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158 DWT.error(DWT.ERROR_NO_HANDLES); |
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159 } |
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160 int colorspace = OS.CGColorSpaceCreateDeviceRGB(); |
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161 if (colorspace is 0) |
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162 DWT.error(DWT.ERROR_NO_HANDLES); |
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163 int handle = OS.CGImageCreate(width, height, 8, 32, bpr, |
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164 colorspace, OS.kCGImageAlphaNoneSkipFirst, provider, null, |
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165 true, 0); |
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166 OS.CGDataProviderRelease(provider); |
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167 if (handle is 0) { |
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168 OS.DisposePtr(data); |
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169 DWT.error(DWT.ERROR_NO_HANDLES); |
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170 } |
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171 int bpc = OS.CGImageGetBitsPerComponent(handle); |
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172 int context = OS.CGBitmapContextCreate(data, width, height, bpc, |
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173 bpr, colorspace, OS.kCGImageAlphaNoneSkipFirst); |
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174 if (context is 0) { |
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175 OS.CGImageRelease(handle); |
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176 OS.DisposePtr(data); |
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177 DWT.error(DWT.ERROR_NO_HANDLES); |
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178 } |
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179 int status = OS.QDPictDrawToCGContext(context, rect, pictDataRef); |
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180 ImageData imgData = null; |
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181 if (status is 0) { |
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182 Image image = Image.carbon_new(Display.getCurrent(), |
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183 DWT.BITMAP, handle, data); |
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184 imgData = image.getImageData(); |
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185 image.dispose(); |
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186 } |
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187 OS.CGContextRelease(context); |
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188 OS.QDPictRelease(pictDataRef); |
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189 return imgData; |
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190 } |
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191 return null; |
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192 } |
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193 |
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194 protected int[] getTypeIds() { |
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195 return new int[] { PICTID }; |
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196 } |
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197 |
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198 protected String[] getTypeNames() { |
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199 return new String[] { PICT }; |
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200 } |
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201 |
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202 bool checkImage(Object object) { |
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203 if (object is null || !(object instanceof ImageData)) return false; |
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204 return true; |
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205 } |
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206 |
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207 protected bool validate(Object object) { |
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208 return checkImage(object); |
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209 } |
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210 } |