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annotate dwt/dnd/ImageTransfer.d @ 8:a9ab4c738ed8

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Fix: instanceof
author Frank Benoit <benoit@tionex.de>
date Wed, 27 Aug 2008 14:32:39 +0200
parents e831403a80a9
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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 this() {
0
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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 = cast(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 = cast(short) width;
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87 rect.bottom = cast(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, cast(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 = cast(int) rect.width;
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146 int height = cast(int) rect.height;
0
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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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a9ab4c738ed8 Fix: instanceof
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203 if (object is null || !( null !is cast(ImageData)object )) return false;
0
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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 }