diff options
Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/graphics/Image.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/graphics/Image.java | 978 |
1 files changed, 0 insertions, 978 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/graphics/Image.java b/bundles/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/graphics/Image.java deleted file mode 100644 index fe3374b526..0000000000 --- a/bundles/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/graphics/Image.java +++ /dev/null @@ -1,978 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2000, 2009 IBM Corporation and others. - * Portion Copyright (c) 2009-2010 compeople AG (http://www.compeople.de). - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - * Compeople AG - QtJambi/Qt based implementation for Windows/Mac OS X/Linux - *******************************************************************************/ -package org.eclipse.swt.graphics; - -import java.io.InputStream; -import java.util.Arrays; -import java.util.List; - -import com.trolltech.qt.core.QSize; -import com.trolltech.qt.gui.QIcon; -import com.trolltech.qt.gui.QImage; -import com.trolltech.qt.gui.QPaintDeviceInterface; -import com.trolltech.qt.gui.QPixmap; -import com.trolltech.qt.gui.QImage.Format; - -import org.eclipse.swt.SWT; -import org.eclipse.swt.SWTError; -import org.eclipse.swt.SWTException; -import org.eclipse.swt.widgets.Display; - -/** - * Instances of this class are graphics which have been prepared for display on - * a specific device. That is, they are ready to paint using methods such as - * <code>GC.drawImage()</code> and display on widgets with, for example, - * <code>Button.setImage()</code>. - * <p> - * If loaded from a file format that supports it, an <code>Image</code> may have - * transparency, meaning that certain pixels are specified as being transparent - * when drawn. Examples of file formats that support transparency are GIF and - * PNG. - * </p> - * <p> - * There are two primary ways to use <code>Images</code>. The first is to load a - * graphic file from disk and create an <code>Image</code> from it. This is done - * using an <code>Image</code> constructor, for example: - * - * <pre> - * Image i = new Image(device, "C:\\graphic.bmp"); - * </pre> - * - * A graphic file may contain a color table specifying which colors the image - * was intended to possess. In the above example, these colors will be mapped to - * the closest available color in SWT. It is possible to get more control over - * the mapping of colors as the image is being created, using code of the form: - * - * <pre> - * ImageData data = new ImageData("C:\\graphic.bmp"); - * RGB[] rgbs = data.getRGBs(); - * // At this point, rgbs contains specifications of all - * // the colors contained within this image. You may - * // allocate as many of these colors as you wish by - * // using the Color constructor Color(RGB), then - * // create the image: - * Image i = new Image(device, data); - * </pre> - * <p> - * Applications which require even greater control over the image loading - * process should use the support provided in class <code>ImageLoader</code>. - * </p> - * <p> - * Application code must explicitly invoke the <code>Image.dispose()</code> - * method to release the operating system resources managed by each instance - * when those instances are no longer required. - * </p> - * - * @see Color - * @see ImageData - * @see ImageLoader - * @see <a href="http://www.eclipse.org/swt/snippets/#image">Image snippets</a> - * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Examples: - * GraphicsExample, ImageAnalyzer</a> - * @see <a href="http://www.eclipse.org/swt/">Sample code and further - * information</a> - */ -public final class Image extends Resource implements Drawable { - - /** - * specifies whether the receiver is a bitmap or an icon (one of - * <code>SWT.BITMAP</code>, <code>SWT.ICON</code>) - */ - private int type = SWT.BITMAP; - - private int transparentPixel = -1; - - /** - * The GC the image is currently selected in. - */ - private GC memGC; - - /** - * The global alpha value to be used for every pixel. - */ - private int alpha = -1; - - private boolean hasMask = false; - - //private QImage image; - private QIcon icon; - private QPixmap pixmap; - - Image(Device device) { - super(device); - } - - /** - * Constructs an empty instance of this class with the specified width and - * height. The result may be drawn upon by creating a GC and using any of - * its drawing operations, as shown in the following example: - * - * <pre> - * Image i = new Image(device, width, height); - * GC gc = new GC(i); - * gc.drawRectangle(0, 0, 50, 50); - * gc.dispose(); - * </pre> - * <p> - * Note: Some platforms may have a limitation on the size of image that can - * be created (size depends on width, height, and depth). For example, - * Windows 95, 98, and ME do not allow images larger than 16M. - * </p> - * - * @param device - * the device on which to create the image - * @param width - * the width of the new image - * @param height - * the height of the new image - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if device is null and there is - * no current device</li> - * <li>ERROR_INVALID_ARGUMENT - if either the width or height - * is negative or zero</li> - * </ul> - * @exception SWTError - * <ul> - * <li>ERROR_NO_HANDLES if a handle could not be obtained for - * image creation</li> - * </ul> - */ - public Image(Device device, int width, int height) { - super(device); - init(width, height); - init(); - } - - /** - * Constructs a new instance of this class based on the provided image, with - * an appearance that varies depending on the value of the flag. The - * possible flag values are: - * <dl> - * <dt><b>{@link SWT#IMAGE_COPY}</b></dt> - * <dd>the result is an identical copy of srcImage</dd> - * <dt><b>{@link SWT#IMAGE_DISABLE}</b></dt> - * <dd>the result is a copy of srcImage which has a <em>disabled</em> look</dd> - * <dt><b>{@link SWT#IMAGE_GRAY}</b></dt> - * <dd>the result is a copy of srcImage which has a <em>gray scale</em> look - * </dd> - * </dl> - * - * @param device - * the device on which to create the image - * @param srcImage - * the image to use as the source - * @param flag - * the style, either <code>IMAGE_COPY</code>, - * <code>IMAGE_DISABLE</code> or <code>IMAGE_GRAY</code> - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if device is null and there is - * no current device</li> - * <li>ERROR_NULL_ARGUMENT - if srcImage is null</li> - * <li>ERROR_INVALID_ARGUMENT - if the flag is not one of - * <code>IMAGE_COPY</code>, <code>IMAGE_DISABLE</code> or - * <code>IMAGE_GRAY</code></li> - * <li>ERROR_INVALID_ARGUMENT - if the image has been - * disposed</li> - * </ul> - * @exception SWTException - * <ul> - * <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or - * an icon, or is otherwise in an invalid state</li> - * <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the image is - * not supported</li> - * </ul> - * @exception SWTError - * <ul> - * <li>ERROR_NO_HANDLES if a handle could not be obtained for - * image creation</li> - * </ul> - */ - public Image(Device device, Image srcImage, int flag) { - super(device); - if (srcImage == null) { - SWT.error(SWT.ERROR_NULL_ARGUMENT); - } - if (srcImage.isDisposed()) { - SWT.error(SWT.ERROR_INVALID_ARGUMENT); - } - device = this.device; - this.type = srcImage.type; - switch (flag) { - case SWT.IMAGE_COPY: - this.pixmap = new QPixmap(srcImage.pixmap); - break; - case SWT.IMAGE_DISABLE: - this.pixmap = createDisabledImage(srcImage); - break; - case SWT.IMAGE_GRAY: - this.pixmap = createGrayImage(srcImage); - break; - default: - SWT.error(SWT.ERROR_INVALID_ARGUMENT); - } - init(); - } - - /** - * Constructs an empty instance of this class with the width and height of - * the specified rectangle. The result may be drawn upon by creating a GC - * and using any of its drawing operations, as shown in the following - * example: - * - * <pre> - * Image i = new Image(device, boundsRectangle); - * GC gc = new GC(i); - * gc.drawRectangle(0, 0, 50, 50); - * gc.dispose(); - * </pre> - * <p> - * Note: Some platforms may have a limitation on the size of image that can - * be created (size depends on width, height, and depth). For example, - * Windows 95, 98, and ME do not allow images larger than 16M. - * </p> - * - * @param device - * the device on which to create the image - * @param bounds - * a rectangle specifying the image's width and height (must not - * be null) - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if device is null and there is - * no current device</li> - * <li>ERROR_NULL_ARGUMENT - if the bounds rectangle is null</li> - * <li>ERROR_INVALID_ARGUMENT - if either the rectangle's - * width or height is negative</li> - * </ul> - * @exception SWTError - * <ul> - * <li>ERROR_NO_HANDLES if a handle could not be obtained for - * image creation</li> - * </ul> - */ - public Image(Device device, Rectangle bounds) { - super(device); - if (bounds == null) { - SWT.error(SWT.ERROR_NULL_ARGUMENT); - } - init(bounds.width, bounds.height); - init(); - } - - /** - * Constructs an instance of this class from the given - * <code>ImageData</code>. - * - * @param device - * the device on which to create the image - * @param data - * the image data to create the image from (must not be null) - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if device is null and there is - * no current device</li> - * <li>ERROR_NULL_ARGUMENT - if the image data is null</li> - * </ul> - * @exception SWTException - * <ul> - * <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the - * ImageData is not supported</li> - * </ul> - * @exception SWTError - * <ul> - * <li>ERROR_NO_HANDLES if a handle could not be obtained for - * image creation</li> - * </ul> - */ - public Image(Device device, ImageData data) { - super(device); - init(data); - init(); - } - - /** - * Constructs an instance of this class, whose type is <code>SWT.ICON</code> - * , from the two given <code>ImageData</code> objects. The two images must - * be the same size. Pixel transparency in either image will be ignored. - * <p> - * The mask image should contain white wherever the icon is to be visible, - * and black wherever the icon is to be transparent. In addition, the source - * image should contain black wherever the icon is to be transparent. - * </p> - * - * @param device - * the device on which to create the icon - * @param source - * the color data for the icon - * @param mask - * the mask data for the icon - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if device is null and there is - * no current device</li> - * <li>ERROR_NULL_ARGUMENT - if either the source or mask is - * null</li> - * <li>ERROR_INVALID_ARGUMENT - if source and mask are - * different sizes</li> - * </ul> - * @exception SWTError - * <ul> - * <li>ERROR_NO_HANDLES if a handle could not be obtained for - * image creation</li> - * </ul> - */ - public Image(Device device, ImageData source, ImageData mask) { - super(device); - if (source == null) { - SWT.error(SWT.ERROR_NULL_ARGUMENT); - } - if (mask == null) { - SWT.error(SWT.ERROR_NULL_ARGUMENT); - } - if (source.width != mask.width || source.height != mask.height) { - SWT.error(SWT.ERROR_INVALID_ARGUMENT); - } - mask = ImageData.convertMask(mask); - ImageData image = new ImageData(source.width, source.height, source.depth, source.palette, source.scanlinePad, - source.data); - image.maskPad = mask.scanlinePad; - image.maskData = mask.data; - init(image); - } - - /** - * Constructs an instance of this class by loading its representation from - * the specified input stream. Throws an error if an error occurs while - * loading the image, or if the result is an image of an unsupported type. - * Application code is still responsible for closing the input stream. - * <p> - * This constructor is provided for convenience when loading a single image - * only. If the stream contains multiple images, only the first one will be - * loaded. To load multiple images, use <code>ImageLoader.load()</code>. - * </p> - * <p> - * This constructor may be used to load a resource as follows: - * </p> - * - * <pre> - * static Image loadImage(Display display, Class clazz, String string) { - * InputStream stream = clazz.getResourceAsStream(string); - * if (stream == null) - * return null; - * Image image = null; - * try { - * image = new Image(display, stream); - * } catch (SWTException ex) { - * } finally { - * try { - * stream.close(); - * } catch (IOException ex) { - * } - * } - * return image; - * } - * </pre> - * - * @param device - * the device on which to create the image - * @param stream - * the input stream to load the image from - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if device is null and there is - * no current device</li> - * <li>ERROR_NULL_ARGUMENT - if the stream is null</li> - * </ul> - * @exception SWTException - * <ul> - * <li>ERROR_IO - if an IO error occurs while reading from - * the stream</li> - * <li>ERROR_INVALID_IMAGE - if the image stream contains - * invalid data</li> - * <li>ERROR_UNSUPPORTED_DEPTH - if the image stream - * describes an image with an unsupported depth</li> - * <li>ERROR_UNSUPPORTED_FORMAT - if the image stream - * contains an unrecognized format</li> - * </ul> - * @exception SWTError - * <ul> - * <li>ERROR_NO_HANDLES if a handle could not be obtained for - * image creation</li> - * </ul> - */ - public Image(Device device, InputStream stream) { - super(device); - init(new ImageData(stream)); - init(); - } - - /** - * Constructs an instance of this class by loading its representation from - * the file with the specified name. Throws an error if an error occurs - * while loading the image, or if the result is an image of an unsupported - * type. - * <p> - * This constructor is provided for convenience when loading a single image - * only. If the specified file contains multiple images, only the first one - * will be used. - * - * @param device - * the device on which to create the image - * @param filename - * the name of the file to load the image from - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if device is null and there is - * no current device</li> <li>ERROR_NULL_ARGUMENT - if the - * file name is null</li> - * </ul> - * @exception SWTException - * <ul> - * <li>ERROR_IO - if an IO error occurs while reading from - * the file</li> <li>ERROR_INVALID_IMAGE - if the image file - * contains invalid data </li> <li>ERROR_UNSUPPORTED_DEPTH - - * if the image file describes an image with an unsupported - * depth</li> <li>ERROR_UNSUPPORTED_FORMAT - if the image - * file contains an unrecognized format</li> - * </ul> - * @exception SWTError - * <ul> - * <li>ERROR_NO_HANDLES if a handle could not be obtained for - * image creation</li> - * </ul> - */ - public Image(Device device, String filename) { - super(device); - if (filename == null) { - SWT.error(SWT.ERROR_NULL_ARGUMENT); - } - initNative(filename); - if (this.pixmap == null) { - init(new ImageData(filename)); - } - init(); - } - - void init(int width, int height) { - if (width <= 0 || height <= 0) { - SWT.error(SWT.ERROR_INVALID_ARGUMENT); - } - this.type = SWT.BITMAP; - pixmap = new QPixmap(width, height); //, Format.Format_ARGB32 - } - - void init(ImageData imageData) { - if (imageData == null) { - SWT.error(SWT.ERROR_NULL_ARGUMENT); - } - - this.type = SWT.BITMAP; - - Format format = getImageFormat(imageData); - byte[] buffer = imageData2RawData(imageData, format); - QImage image = new QImage(buffer, imageData.width, imageData.height, format); - - if (imageData.colorTable != null) { - image.setColorTable(imageData.colorTable); - } - - if (imageData.maskData != null) { - hasMask = true; - } - updateAlphaChannel(image, imageData); - - pixmap = QPixmap.fromImage(image); - - try { - this.transparentPixel = getTransparentPixel(imageData); - } catch (Error e) { - pixmap = null; - throw e; - } - } - - private Format getImageFormat(ImageData imageData) { - switch (imageData.depth) { - case 32: - return Format.Format_ARGB32; - case 24: - return Format.Format_RGB888; - case 16: - return Format.Format_RGB16; - case 8: - case 4: - return Format.Format_Indexed8; - case 1: - return Format.Format_Mono; - default: - throw new RuntimeException("invalid color depth"); //$NON-NLS-1$ - } - } - - private void updateAlphaChannel(QImage image, ImageData imageData) { - Format format = null; - byte[] data = null; - if (imageData.maskData != null) { - // Mask data is 1 bit/pixel - data = imageData.maskData; - format = Format.Format_Mono; - } else if (imageData.alpha != -1) { - data = new byte[image.width() * image.height()]; - Arrays.fill(data, (byte) alpha); - format = Format.Format_Indexed8; - } else if (imageData.alphaData != null) { - data = imageData.alphaData; - format = Format.Format_Indexed8; - } - if (data != null) { - QImage alpha = new QImage(data, imageData.width, imageData.height, format); - image.setAlphaChannel(alpha); - } - } - - private byte[] imageData2RawData(ImageData image, Format format) { - PaletteData palette = image.palette; - if (!((image.depth == 1 || image.depth == 2 || image.depth == 4 || image.depth == 8) && !palette.isDirect - || image.depth == 8 || (image.depth == 16 || image.depth == 24 || image.depth == 32) - && palette.isDirect)) { - SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); - } - - byte[] buffer = image.data; - if (format.equals(Format.Format_RGB888)) { - // swap red and blue bytes - for (int i = 0; i < buffer.length - 2; i += 3) { - byte tmp = buffer[i + 2]; - buffer[i + 2] = buffer[i]; - buffer[i] = tmp; - } - } - - return buffer; - } - - private int getTransparentPixel(ImageData image) { - if (image.transparentPixel != -1) { - PaletteData palette = image.palette; - RGB rgb = null; - if (palette.isDirect) { - rgb = palette.getRGB(image.transparentPixel); - } else { - if (image.transparentPixel < palette.colors.length) { - rgb = palette.getRGB(image.transparentPixel); - } - } - - if (rgb != null) { - return rgb.red << 24 | rgb.green << 16 | rgb.blue << 8 | 0xFF; - } - } - return -1; - } - - void initNative(String filename) { - if (filename.toLowerCase().endsWith(".ico")) { //$NON-NLS-1$ - this.type = SWT.ICON; - icon = new QIcon(filename); - } else { - this.type = SWT.BITMAP; - pixmap = new QPixmap(filename); - } - } - - private QPixmap createGrayImage(Image srcImage) { - return srcImage.getQPixmap(); //.convertToFormat(Format.Format_Indexed8, ImageConversionFlag.ThresholdDither); - } - - private QPixmap createDisabledImage(Image srcImage) { - // TODO the same as gray? - return createGrayImage(srcImage); - } - - private QImage getQImage() { - return pixmap.toImage(); - } - - public QIcon getQIcon() { - // fallback strategy if image is a bitmap - if (icon == null) { - icon = new QIcon(getQPixmap()); - } - return icon; - } - - public QPixmap getQPixmap() { - // if (pixmap == null) { - // if (image != null) { - // pixmap = QPixmap.fromImage(image); - // } else if (icon != null) { - // pixmap = icon.pixmap(getDefaultIconSize()); - // } - // } - return pixmap; - } - - public QSize getDefaultIconSize() { - List<QSize> sizes = getQIcon().availableSizes(); - if (sizes.isEmpty()) { - return new QSize(); - } - return sizes.get(0); - } - - public boolean isIcon() { - return type == SWT.ICON; - } - - public boolean isBitmap() { - return type == SWT.BITMAP; - } - - @Override - void destroy() { - if (memGC != null) { - memGC.dispose(); - memGC = null; - } - // image = null; - // icon = null; - pixmap = null; - } - - /** - * Compares the argument to the receiver, and returns true if they represent - * the <em>same</em> object using a class specific comparison. - * - * @param object - * the object to compare with this object - * @return <code>true</code> if the object is the same as this object and - * <code>false</code> otherwise - * - * @see #hashCode - */ - @Override - public boolean equals(Object object) { - if (object == this) { - return true; - } - if (!(object instanceof Image)) { - return false; - } - Image other = (Image) object; - return device == other.device && pixmap == other.pixmap && transparentPixel == other.transparentPixel; - } - - /** - * Returns the color to which to map the transparent pixel, or null if the - * receiver has no transparent pixel. - * <p> - * There are certain uses of Images that do not support transparency (for - * example, setting an image into a button or label). In these cases, it may - * be desired to simulate transparency by using the background color of the - * widget to paint the transparent pixels of the image. Use this method to - * check which color will be used in these cases in place of transparency. - * This value may be set with setBackground(). - * <p> - * - * @return the background color of the image, or null if there is no - * transparency in the image - * - * @exception SWTException - * <ul> - * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been - * disposed</li> - * </ul> - */ - public Color getBackground() { - if (isDisposed()) { - SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); - } - if (transparentPixel == -1) { - return null; - } - int red = transparentPixel >> 16 & 0xFF; - int green = transparentPixel >> 8 & 0xFF; - int blue = transparentPixel >> 0 & 0xFF; - return new Color(device, red, green, blue); - } - - /** - * Returns the bounds of the receiver. The rectangle will always have x and - * y values of 0, and the width and height of the image. - * - * @return a rectangle specifying the image's bounds - * - * @exception SWTException - * <ul> - * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been - * disposed</li> - * <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or - * an icon</li> - * </ul> - */ - public Rectangle getBounds() { - if (isDisposed()) { - SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); - } - - return new Rectangle(0, 0, pixmap.width(), pixmap.height()); - } - - /** - * Returns an <code>ImageData</code> based on the receiver Modifications - * made to this <code>ImageData</code> will not affect the Image. - * - * @return an <code>ImageData</code> containing the image's data and - * attributes - * - * @exception SWTException - * <ul> - * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been - * disposed</li> - * <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or - * an icon</li> - * </ul> - * - * @see ImageData - */ - public ImageData getImageData() { - if (isDisposed()) { - SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); - } - - QImage image = getQImage(); - - PaletteData palette = new PaletteData(0x00FF0000, 0x00FF00, 0x00FF); - ImageData imageData = new ImageData(image.width(), image.height(), image.depth(), palette, 4, image - .copyOfBytes()); - imageData.bytesPerLine = image.bytesPerLine(); - imageData.transparentPixel = -1; - imageData.alpha = alpha; - imageData.alphaData = getAlphaData(image); - - if (image.numColors() > 0) { - List<Integer> colorTable = image.colorTable(); - imageData.colorTable = colorTable; - } - - return imageData; - } - - private byte[] getAlphaData(QImage image) { - if (hasMask) { - // Mask data is 1 bit/pixel - if (image.hasAlphaChannel()) { - QImage alpha = image.alphaChannel(); - alpha.convertToFormat(Format.Format_Mono); - return alpha.copyOfBytes(); - } else { - int maskSize = image.width() * image.height() / 8; - byte[] alphaData = new byte[maskSize]; - Arrays.fill(alphaData, (byte) 0xFF); - return alphaData; - //imageData.maskPad = 8; - } - } else if (alpha != -1) { - byte[] alphaData = new byte[image.width() * image.height()]; - Arrays.fill(alphaData, (byte) alpha); - return alphaData; - } else if (image.hasAlphaChannel()) { - QImage alpha = image.alphaChannel(); - return alpha.copyOfBytes(); - } - return null; - } - - public static Image qt_new(Display device, int type, QIcon qIcon) { - Image image = new Image(device); - image.type = type; - image.icon = qIcon; - return image; - } - - /** - * Returns an integer hash code for the receiver. Any two objects that - * return <code>true</code> when passed to <code>equals</code> must return - * the same value for this method. - * - * @return the receiver's hash - * - * @see #equals - */ - @Override - public int hashCode() { - return pixmap != null ? (int) pixmap.hashCode() : 0; - } - - /** - * Invokes platform specific functionality to allocate a new GC handle. - * <p> - * <b>IMPORTANT:</b> This method is <em>not</em> part of the public API for - * <code>Image</code>. It is marked public only so that it can be shared - * within the packages provided by SWT. It is not available on all - * platforms, and should never be called from application code. - * </p> - * - * @param data - * the platform specific GC data - * @return the platform specific GC handle - */ - public QPaintDeviceInterface internal_new_GC(GCData data) { - data.backgroundColor = getBackground(); - data.device = device; - return pixmap; - } - - /** - * Invokes platform specific functionality to dispose a GC handle. - * <p> - * <b>IMPORTANT:</b> This method is <em>not</em> part of the public API for - * <code>Image</code>. It is marked public only so that it can be shared - * within the packages provided by SWT. It is not available on all - * platforms, and should never be called from application code. - * </p> - * - * @param hDC - * the platform specific GC handle - * @param data - * the platform specific GC data - */ - public void internal_dispose_GC(QPaintDeviceInterface paintDevice, GCData data) { - } - - /** - * Returns <code>true</code> if the image has been disposed, and - * <code>false</code> otherwise. - * <p> - * This method gets the dispose state for the image. When an image has been - * disposed, it is an error to invoke any other method using the image. - * - * @return <code>true</code> when the image is disposed and - * <code>false</code> otherwise - */ - @Override - public boolean isDisposed() { - return pixmap == null && icon == null; - } - - /** - * Sets the color to which to map the transparent pixel. - * <p> - * There are certain uses of <code>Images</code> that do not support - * transparency (for example, setting an image into a button or label). In - * these cases, it may be desired to simulate transparency by using the - * background color of the widget to paint the transparent pixels of the - * image. This method specifies the color that will be used in these cases. - * For example: - * - * <pre> - * Button b = new Button(); - * image.setBackground(b.getBackground()); - * b.setImage(image); - * </pre> - * - * </p> - * <p> - * The image may be modified by this operation (in effect, the transparent - * regions may be filled with the supplied color). Hence this operation is - * not reversible and it is not legal to call this function twice or with a - * null argument. - * </p> - * <p> - * This method has no effect if the receiver does not have a transparent - * pixel value. - * </p> - * - * @param color - * the color to use when a transparent pixel is specified - * - * @exception IllegalArgumentException - * <ul> - * <li>ERROR_NULL_ARGUMENT - if the color is null</li> - * <li>ERROR_INVALID_ARGUMENT - if the color has been - * disposed</li> - * </ul> - * @exception SWTException - * <ul> - * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been - * disposed</li> - * </ul> - */ - public void setBackground(Color color) { - if (isDisposed()) { - SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); - } - if (color == null) { - SWT.error(SWT.ERROR_NULL_ARGUMENT); - } - if (color.isDisposed()) { - SWT.error(SWT.ERROR_INVALID_ARGUMENT); - } - if (transparentPixel == -1) { - return; - } - return; // TODO function disabled - // byte red = (byte) ((transparentPixel >> 16) & 0xFF); - // byte green = (byte) ((transparentPixel >> 8) & 0xFF); - // byte blue = (byte) ((transparentPixel >> 0) & 0xFF); - // byte newRed = (byte) ((int) (color.handle[0] * 255) & 0xFF); - // byte newGreen = (byte) ((int) (color.handle[1] * 255) & 0xFF); - // byte newBlue = (byte) ((int) (color.handle[2] * 255) & 0xFF); - // NSBitmapImageRep imageRep = getRepresentation(); - // long /* int */bpr = imageRep.bytesPerRow(); - // long /* int */data = imageRep.bitmapData(); - // byte[] line = new byte[(int) bpr]; - // for (int i = 0, offset = 0; i < height; i++, offset += bpr) { - // OS.memmove(line, data + offset, bpr); - // for (int j = 0; j < line.length; j += 4) { - // if (line[j + 1] == red && line[j + 2] == green - // && line[j + 3] == blue) { - // line[j + 1] = newRed; - // line[j + 2] = newGreen; - // line[j + 3] = newBlue; - // } - // } - // OS.memmove(data + offset, line, bpr); - // } - // transparentPixel = (newRed & 0xFF) << 16 | (newGreen & 0xFF) << 8 - // | (newBlue & 0xFF); - } - - /** - * Returns a string containing a concise, human-readable description of the - * receiver. - * - * @return a string representation of the receiver - */ - @Override - public String toString() { - if (isDisposed()) { - return "Image {*DISPOSED*}"; //$NON-NLS-1$ - } - return "Image {pixmap: " + pixmap + ", icon: " + icon + " }"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ - } - - public void setMemGC(GC gc) { - this.memGC = gc; - } - -} |