| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| |
| import org.eclipse.swt.internal.cairo.*; |
| import org.eclipse.swt.internal.motif.*; |
| import org.eclipse.swt.*; |
| import java.io.*; |
| |
| /** |
| * 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>) |
| * <p> |
| * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT |
| * public API. 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 accessed from application code. |
| * </p> |
| * |
| * @noreference This field is not intended to be referenced by clients. |
| */ |
| public int type; |
| |
| /** |
| * The handle to the OS pixmap resource. |
| * (Warning: This field is platform dependent) |
| * <p> |
| * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT |
| * public API. 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 accessed from application code. |
| * </p> |
| * |
| * @noreference This field is not intended to be referenced by clients. |
| */ |
| public int pixmap; |
| |
| /** |
| * The handle to the OS mask resource. |
| * (Warning: This field is platform dependent) |
| * <p> |
| * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT |
| * public API. 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 accessed from application code. |
| * </p> |
| * |
| * @noreference This field is not intended to be referenced by clients. |
| */ |
| public int mask; |
| |
| long /*int*/ surface; |
| |
| /** |
| * specifies the transparent pixel |
| */ |
| int transparentPixel = -1; |
| |
| /** |
| * The GC the image is currently selected in. |
| */ |
| GC memGC; |
| |
| /** |
| * The alpha data of the image. |
| */ |
| byte[] alphaData; |
| |
| /** |
| * The global alpha value to be used for every pixel. |
| */ |
| int alpha = -1; |
| |
| /** |
| * The width of the image. |
| */ |
| int width = -1; |
| |
| /** |
| * The height of the image. |
| */ |
| int height = -1; |
| |
| /** |
| * Specifies the default scanline padding. |
| */ |
| static final int DEFAULT_SCANLINE_PAD = 4; |
| |
| 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); |
| device = this.device; |
| if (srcImage == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (srcImage.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| int xDisplay = device.xDisplay; |
| this.type = srcImage.type; |
| this.mask = 0; |
| int[] unused = new int[1]; |
| int[] w = new int[1]; |
| int[] h = new int[1]; |
| OS.XGetGeometry(xDisplay, srcImage.pixmap, unused, unused, unused, w, h, unused, unused); |
| int width = w[0]; |
| int height = h[0]; |
| int drawable = OS.XDefaultRootWindow(xDisplay); |
| /* Don't create the mask here if flag is SWT.IMAGE_GRAY. See below.*/ |
| if (flag != SWT.IMAGE_GRAY && ((srcImage.type == SWT.ICON && srcImage.mask != 0) || srcImage.transparentPixel != -1)) { |
| /* Generate the mask if necessary. */ |
| if (srcImage.transparentPixel != -1) srcImage.createMask(); |
| int mask = OS.XCreatePixmap(xDisplay, drawable, width, height, 1); |
| int gc = OS.XCreateGC(xDisplay, mask, 0, null); |
| OS.XCopyArea(xDisplay, srcImage.mask, mask, gc, 0, 0, width, height, 0, 0); |
| OS.XFreeGC(xDisplay, gc); |
| this.mask = mask; |
| /* Destroy the image mask if the there is a GC created on the image */ |
| if (srcImage.transparentPixel != -1 && srcImage.memGC != null) srcImage.destroyMask(); |
| } |
| switch (flag) { |
| case SWT.IMAGE_COPY: |
| int[] depth = new int[1]; |
| OS.XGetGeometry(xDisplay, srcImage.pixmap, unused, unused, unused, unused, unused, unused, depth); |
| int pixmap = OS.XCreatePixmap(xDisplay, drawable, width, height, depth[0]); |
| int gc = OS.XCreateGC(xDisplay, pixmap, 0, null); |
| OS.XCopyArea(xDisplay, srcImage.pixmap, pixmap, gc, 0, 0, width, height, 0, 0); |
| OS.XFreeGC(xDisplay, gc); |
| this.pixmap = pixmap; |
| transparentPixel = srcImage.transparentPixel; |
| alpha = srcImage.alpha; |
| if (srcImage.alphaData != null) { |
| alphaData = new byte[srcImage.alphaData.length]; |
| System.arraycopy(srcImage.alphaData, 0, alphaData, 0, alphaData.length); |
| } |
| createAlphaMask(width, height); |
| break; |
| case SWT.IMAGE_DISABLE: |
| /* Get src image data */ |
| XImage srcXImage = new XImage(); |
| int srcXImagePtr = OS.XGetImage(xDisplay, srcImage.pixmap, 0, 0, width, height, OS.AllPlanes, OS.ZPixmap); |
| OS.memmove(srcXImage, srcXImagePtr, XImage.sizeof); |
| byte[] srcData = new byte[srcXImage.bytes_per_line * srcXImage.height]; |
| OS.memmove(srcData, srcXImage.data, srcData.length); |
| /* Create destination image */ |
| int destPixmap = OS.XCreatePixmap(xDisplay, drawable, width, height, srcXImage.depth); |
| int visualPtr = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay)); |
| int screenDepth = OS.XDefaultDepthOfScreen(OS.XDefaultScreenOfDisplay(xDisplay)); |
| int destXImagePtr = OS.XCreateImage(xDisplay, visualPtr, screenDepth, OS.ZPixmap, 0, 0, width, height, srcXImage.bitmap_pad, 0); |
| XImage destXImage = new XImage(); |
| OS.memmove(destXImage, destXImagePtr, XImage.sizeof); |
| int bufSize = destXImage.bytes_per_line * destXImage.height; |
| int bufPtr = OS.XtMalloc(bufSize); |
| destXImage.data = bufPtr; |
| OS.memmove(destXImagePtr, destXImage, XImage.sizeof); |
| byte[] destData = new byte[bufSize]; |
| /* Find the colors to map to */ |
| Color zeroColor = device.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW); |
| Color oneColor = device.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND); |
| int zeroPixel = zeroColor.handle.pixel; |
| int onePixel = oneColor.handle.pixel; |
| switch (srcXImage.bits_per_pixel) { |
| case 1: |
| /* |
| * Nothing we can reasonably do here except copy |
| * the bitmap; we can't make it a higher color depth. |
| * Short-circuit the rest of the code and return. |
| */ |
| gc = OS.XCreateGC(xDisplay, drawable, 0, null); |
| pixmap = OS.XCreatePixmap(xDisplay, drawable, width, height, 1); |
| OS.XCopyArea(xDisplay, srcImage.pixmap, pixmap, gc, 0, 0, width, height, 0, 0); |
| OS.XDestroyImage(srcXImagePtr); |
| OS.XDestroyImage(destXImagePtr); |
| OS.XFreeGC(xDisplay, gc); |
| return; |
| case 4: |
| SWT.error(SWT.ERROR_NOT_IMPLEMENTED); |
| break; |
| case 8: |
| int index = 0; |
| int srcPixel, r, g, b; |
| XColor[] colors = new XColor[256]; |
| int colormap = OS.XDefaultColormap(xDisplay, OS.XDefaultScreen(xDisplay)); |
| for (int y = 0; y < srcXImage.height; y++) { |
| for (int x = 0; x < srcXImage.bytes_per_line; x++) { |
| srcPixel = srcData[index + x] & 0xFF; |
| /* Get the RGB values of srcPixel */ |
| if (colors[srcPixel] == null) { |
| XColor color = new XColor(); |
| color.pixel = srcPixel; |
| OS.XQueryColor(xDisplay, colormap, color); |
| colors[srcPixel] = color; |
| } |
| XColor xColor = colors[srcPixel]; |
| r = (xColor.red >> 8) & 0xFF; |
| g = (xColor.green >> 8) & 0xFF; |
| b = (xColor.blue >> 8) & 0xFF; |
| /* See if the rgb maps to 0 or 1 */ |
| if ((r * r + g * g + b * b) < 98304) { |
| /* Map down to 0 */ |
| destData[index + x] = (byte)zeroPixel; |
| } else { |
| /* Map up to 1 */ |
| destData[index + x] = (byte)onePixel; |
| } |
| } |
| index += srcXImage.bytes_per_line; |
| } |
| break; |
| case 16: |
| index = 0; |
| /* Get masks */ |
| Visual visual = new Visual(); |
| OS.memmove(visual, visualPtr, Visual.sizeof); |
| int redMask = visual.red_mask; |
| int greenMask = visual.green_mask; |
| int blueMask = visual.blue_mask; |
| /* Calculate mask shifts */ |
| int[] shift = new int[1]; |
| getOffsetForMask(16, redMask, srcXImage.byte_order, shift); |
| int rShift = 24 - shift[0]; |
| getOffsetForMask(16, greenMask, srcXImage.byte_order, shift); |
| int gShift = 24 - shift[0]; |
| getOffsetForMask(16, blueMask, srcXImage.byte_order, shift); |
| int bShift = 24 - shift[0]; |
| byte zeroLow = (byte)(zeroPixel & 0xFF); |
| byte zeroHigh = (byte)((zeroPixel >> 8) & 0xFF); |
| byte oneLow = (byte)(onePixel & 0xFF); |
| byte oneHigh = (byte)((onePixel >> 8) & 0xFF); |
| for (int y = 0; y < srcXImage.height; y++) { |
| int xIndex = 0; |
| for (int x = 0; x < srcXImage.bytes_per_line; x += 2) { |
| srcPixel = ((srcData[index + xIndex + 1] & 0xFF) << 8) | (srcData[index + xIndex] & 0xFF); |
| r = (srcPixel & redMask) << rShift >> 16; |
| g = (srcPixel & greenMask) << gShift >> 16; |
| b = (srcPixel & blueMask) << bShift >> 16; |
| /* See if the rgb maps to 0 or 1 */ |
| if ((r * r + g * g + b * b) < 98304) { |
| /* Map down to 0 */ |
| destData[index + xIndex] = zeroLow; |
| destData[index + xIndex + 1] = zeroHigh; |
| } else { |
| /* Map up to 1 */ |
| destData[index + xIndex] = oneLow; |
| destData[index + xIndex + 1] = oneHigh; |
| } |
| xIndex += srcXImage.bits_per_pixel / 8; |
| } |
| index += srcXImage.bytes_per_line; |
| } |
| break; |
| case 24: |
| case 32: |
| index = 0; |
| /* Get masks */ |
| visual = new Visual(); |
| OS.memmove(visual, visualPtr, Visual.sizeof); |
| redMask = visual.red_mask; |
| greenMask = visual.green_mask; |
| blueMask = visual.blue_mask; |
| /* Calculate mask shifts */ |
| shift = new int[1]; |
| getOffsetForMask(srcXImage.bits_per_pixel, redMask, srcXImage.byte_order, shift); |
| rShift = shift[0]; |
| getOffsetForMask(srcXImage.bits_per_pixel, greenMask, srcXImage.byte_order, shift); |
| gShift = shift[0]; |
| getOffsetForMask(srcXImage.bits_per_pixel, blueMask, srcXImage.byte_order, shift); |
| bShift = shift[0]; |
| byte zeroR = (byte)zeroColor.getRed(); |
| byte zeroG = (byte)zeroColor.getGreen(); |
| byte zeroB = (byte)zeroColor.getBlue(); |
| byte oneR = (byte)oneColor.getRed(); |
| byte oneG = (byte)oneColor.getGreen(); |
| byte oneB = (byte)oneColor.getBlue(); |
| for (int y = 0; y < srcXImage.height; y++) { |
| int xIndex = 0; |
| for (int x = 0; x < srcXImage.width; x++) { |
| r = srcData[index + xIndex + rShift] & 0xFF; |
| g = srcData[index + xIndex + gShift] & 0xFF; |
| b = srcData[index + xIndex + bShift] & 0xFF; |
| /* See if the rgb maps to 0 or 1 */ |
| if ((r * r + g * g + b * b) < 98304) { |
| /* Map down to 0 */ |
| destData[index + xIndex + rShift] = zeroR; |
| destData[index + xIndex + gShift] = zeroG; |
| destData[index + xIndex + bShift] = zeroB; |
| } else { |
| /* Map up to 1 */ |
| destData[index + xIndex + rShift] = oneR; |
| destData[index + xIndex + gShift] = oneG; |
| destData[index + xIndex + bShift] = oneB; |
| } |
| xIndex += destXImage.bits_per_pixel / 8; |
| } |
| index += srcXImage.bytes_per_line; |
| } |
| break; |
| default: |
| SWT.error(SWT.ERROR_INVALID_IMAGE); |
| } |
| OS.memmove(destXImage.data, destData, destData.length); |
| gc = OS.XCreateGC(xDisplay, destPixmap, 0, null); |
| OS.XPutImage(xDisplay, destPixmap, gc, destXImagePtr, 0, 0, 0, 0, width, height); |
| OS.XDestroyImage(destXImagePtr); |
| OS.XDestroyImage(srcXImagePtr); |
| OS.XFreeGC(xDisplay, gc); |
| alpha = srcImage.alpha; |
| if (srcImage.alphaData != null) { |
| alphaData = new byte[srcImage.alphaData.length]; |
| System.arraycopy(srcImage.alphaData, 0, alphaData, 0, alphaData.length); |
| } |
| createAlphaMask(width, height); |
| this.pixmap = destPixmap; |
| break; |
| case SWT.IMAGE_GRAY: |
| ImageData data = srcImage.getImageData(); |
| PaletteData palette = data.palette; |
| ImageData newData = data; |
| if (!palette.isDirect) { |
| /* Convert the palette entries to gray. */ |
| RGB [] rgbs = palette.getRGBs(); |
| for (int i=0; i<rgbs.length; i++) { |
| if (data.transparentPixel != i) { |
| RGB color = rgbs [i]; |
| int red = color.red; |
| int green = color.green; |
| int blue = color.blue; |
| int intensity = (red+red+green+green+green+green+green+blue) >> 3; |
| color.red = color.green = color.blue = intensity; |
| } |
| } |
| newData.palette = new PaletteData(rgbs); |
| } else { |
| /* Create a 8 bit depth image data with a gray palette. */ |
| RGB[] rgbs = new RGB[256]; |
| for (int i=0; i<rgbs.length; i++) { |
| rgbs[i] = new RGB(i, i, i); |
| } |
| newData = new ImageData(width, height, 8, new PaletteData(rgbs)); |
| newData.alpha = data.alpha; |
| newData.alphaData = data.alphaData; |
| newData.maskData = data.maskData; |
| newData.maskPad = data.maskPad; |
| if (data.transparentPixel != -1) newData.transparentPixel = 254; |
| |
| /* Convert the pixels. */ |
| int[] scanline = new int[width]; |
| int redMask = palette.redMask; |
| int greenMask = palette.greenMask; |
| int blueMask = palette.blueMask; |
| int redShift = palette.redShift; |
| int greenShift = palette.greenShift; |
| int blueShift = palette.blueShift; |
| for (int y=0; y<height; y++) { |
| int offset = y * newData.bytesPerLine; |
| data.getPixels(0, y, width, scanline, 0); |
| for (int x=0; x<width; x++) { |
| int pixel = scanline[x]; |
| if (pixel != data.transparentPixel) { |
| int red = pixel & redMask; |
| red = (redShift < 0) ? red >>> -redShift : red << redShift; |
| int green = pixel & greenMask; |
| green = (greenShift < 0) ? green >>> -greenShift : green << greenShift; |
| int blue = pixel & blueMask; |
| blue = (blueShift < 0) ? blue >>> -blueShift : blue << blueShift; |
| int intensity = (red+red+green+green+green+green+green+blue) >> 3; |
| if (newData.transparentPixel == intensity) intensity = 255; |
| newData.data[offset] = (byte)intensity; |
| } else { |
| newData.data[offset] = (byte)254; |
| } |
| offset++; |
| } |
| } |
| } |
| init (newData); |
| 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 image) { |
| super(device); |
| init(image); |
| 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); |
| init(); |
| } |
| /** |
| * 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); |
| init(new ImageData(filename)); |
| init(); |
| } |
| void createAlphaMask(int width, int height) { |
| if (device.useXRender && (alpha != -1 || alphaData != null)) { |
| int xDisplay = device.xDisplay; |
| int drawable = OS.XDefaultRootWindow(xDisplay); |
| mask = OS.XCreatePixmap(xDisplay, drawable, alpha != -1 ? 1 : width, alpha != -1 ? 1 : height, 8); |
| if (mask == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int gc = OS.XCreateGC(xDisplay, mask, 0, null); |
| if (alpha != -1) { |
| OS.XSetForeground(xDisplay, gc, (alpha & 0xFF) << 8 | (alpha & 0xFF)); |
| OS.XFillRectangle(xDisplay, mask, gc, 0, 0, 1, 1); |
| } else { |
| int imagePtr = OS.XGetImage(xDisplay, mask, 0, 0, width, height, OS.AllPlanes, OS.ZPixmap); |
| XImage xImage = new XImage(); |
| OS.memmove(xImage, imagePtr, XImage.sizeof); |
| if (xImage.bytes_per_line == width) { |
| OS.memmove(xImage.data, alphaData, alphaData.length); |
| } else { |
| byte[] line = new byte[xImage.bytes_per_line]; |
| for (int y = 0; y < height; y++) { |
| System.arraycopy(alphaData, width * y, line, 0, width); |
| OS.memmove(xImage.data + (xImage.bytes_per_line * y), line, xImage.bytes_per_line); |
| } |
| } |
| OS.XPutImage(xDisplay, mask, gc, imagePtr, 0, 0, 0, 0, width, height); |
| OS.XDestroyImage(imagePtr); |
| } |
| OS.XFreeGC(xDisplay, gc); |
| } |
| } |
| /** |
| * Create the receiver's mask if necessary. |
| */ |
| void createMask() { |
| if (mask != 0) return; |
| int xDisplay = device.xDisplay; |
| int drawable = OS.XDefaultRootWindow(xDisplay); |
| int screenDepth = OS.XDefaultDepthOfScreen(OS.XDefaultScreenOfDisplay(xDisplay)); |
| int visual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay)); |
| ImageData maskImage = getImageData().getTransparencyMask(); |
| int maskPixmap = OS.XCreatePixmap(xDisplay, drawable, maskImage.width, maskImage.height, 1); |
| XColor[] xcolors = device.xcolors; |
| int gc = OS.XCreateGC(xDisplay, maskPixmap, 0, null); |
| Image.putImage(maskImage, 0, 0, maskImage.width, maskImage.height, 0, 0, maskImage.width, maskImage.height, xDisplay, visual, screenDepth, xcolors, null, true, maskPixmap, gc); |
| OS.XFreeGC(xDisplay, gc); |
| this.mask = maskPixmap; |
| } |
| void createSurface() { |
| if (surface != 0) return; |
| int [] unused = new int [1]; int [] width = new int [1]; int [] height = new int [1]; |
| OS.XGetGeometry (device.xDisplay, pixmap, unused, unused, unused, width, height, unused, unused); |
| int xDisplay = device.xDisplay; |
| int xDrawable = pixmap; |
| int xVisual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay)); |
| surface = Cairo.cairo_xlib_surface_create(xDisplay, xDrawable, xVisual, width[0], height[0]); |
| } |
| void destroy() { |
| if (memGC != null) memGC.dispose(); |
| int xDisplay = device.xDisplay; |
| if (pixmap != 0) OS.XFreePixmap (xDisplay, pixmap); |
| if (mask != 0) OS.XFreePixmap (xDisplay, mask); |
| if (surface != 0) Cairo.cairo_surface_destroy(surface); |
| surface = pixmap = mask = 0; |
| memGC = null; |
| } |
| /** |
| * Destroy the receiver's mask if it exists. |
| */ |
| void destroyMask() { |
| if (mask == 0) return; |
| OS.XFreePixmap (device.xDisplay, mask); |
| mask = 0; |
| } |
| /** |
| * 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 |
| */ |
| public boolean equals (Object object) { |
| if (object == this) return true; |
| if (!(object instanceof Image)) return false; |
| Image image = (Image)object; |
| return device == image.device && pixmap == image.pixmap; |
| } |
| /** |
| * 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; |
| XColor xColor = new XColor(); |
| xColor.pixel = transparentPixel; |
| int xDisplay = device.xDisplay; |
| int colormap = OS.XDefaultColormap(xDisplay, OS.XDefaultScreen(xDisplay)); |
| OS.XQueryColor(xDisplay, colormap, xColor); |
| return Color.motif_new(device, xColor); |
| } |
| /** |
| * 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); |
| if (width != -1 && height != -1) { |
| return new Rectangle(0, 0, width, height); |
| } |
| int [] unused = new int [1]; int [] w = new int [1]; int [] h = new int [1]; |
| OS.XGetGeometry (device.xDisplay, pixmap, unused, unused, unused, w, h, unused, unused); |
| return new Rectangle(0, 0, width = w [0], height = h [0]); |
| } |
| /** |
| * 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); |
| Rectangle srcBounds = getBounds(); |
| int width = srcBounds.width; |
| int height = srcBounds.height; |
| int xDisplay = device.xDisplay; |
| int xSrcImagePtr = OS.XGetImage(xDisplay, pixmap, 0, 0, width, height, OS.AllPlanes, OS.ZPixmap); |
| if (xSrcImagePtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| XImage xSrcImage = new XImage(); |
| OS.memmove(xSrcImage, xSrcImagePtr, XImage.sizeof); |
| |
| /* Get the data and palette of the source image. */ |
| PaletteData palette = null; |
| int length = xSrcImage.bytes_per_line * xSrcImage.height; |
| byte[] srcData = new byte[length]; |
| OS.memmove(srcData, xSrcImage.data, length); |
| switch (xSrcImage.bits_per_pixel) { |
| case 1: |
| palette = new PaletteData(new RGB[] { |
| new RGB(0, 0, 0), |
| new RGB(255, 255, 255) |
| }); |
| break; |
| case 4: |
| /* |
| * We currently don't run on a 4-bit server, so 4-bit images |
| * should not exist. |
| */ |
| SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); |
| case 8: |
| /* Normalize the pixels in the source image data (by making the |
| * pixel values sequential starting at pixel 0). Reserve normalized |
| * pixel 0 so that it maps to real pixel 0. This assumes pixel 0 is |
| * always used in the image. |
| */ |
| byte[] normPixel = new byte[256]; |
| for (int index = 0; index < normPixel.length; index++) { |
| normPixel[index] = 0; |
| } |
| int numPixels = 1; |
| int index = 0; |
| for (int y = 0; y < xSrcImage.height; y++) { |
| for (int x = 0; x < xSrcImage.bytes_per_line; x++) { |
| int srcPixel = srcData[index + x] & 0xFF; |
| if (srcPixel != 0 && normPixel[srcPixel] == 0) { |
| normPixel[srcPixel] = (byte)numPixels++; |
| } |
| srcData[index + x] = normPixel[srcPixel]; |
| } |
| index += xSrcImage.bytes_per_line; |
| } |
| |
| /* Create a palette with only the RGB values used in the image. */ |
| int colormap = OS.XDefaultColormap(xDisplay, OS.XDefaultScreen(xDisplay)); |
| RGB[] rgbs = new RGB[numPixels]; |
| XColor color = new XColor(); |
| for (int srcPixel = 0; srcPixel < normPixel.length; srcPixel++) { |
| /* If the pixel value was used in the image, get its RGB values. */ |
| if (srcPixel == 0 || normPixel[srcPixel] != 0) { |
| color.pixel = srcPixel; |
| OS.XQueryColor(xDisplay, colormap, color); |
| int rgbIndex = normPixel[srcPixel] & 0xFF; |
| rgbs[rgbIndex] = new RGB((color.red >> 8) & 0xFF, (color.green >> 8) & 0xFF, (color.blue >> 8) & 0xFF); |
| } |
| } |
| palette = new PaletteData(rgbs); |
| break; |
| case 16: |
| /* Byte swap the data if necessary */ |
| if (xSrcImage.byte_order == OS.MSBFirst) { |
| for (int i = 0; i < srcData.length; i += 2) { |
| byte b = srcData[i]; |
| srcData[i] = srcData[i+1]; |
| srcData[i+1] = b; |
| } |
| } |
| break; |
| case 24: |
| break; |
| case 32: |
| /* Byte swap the data if necessary */ |
| if (xSrcImage.byte_order == OS.LSBFirst) { |
| for (int i = 0; i < srcData.length; i += 4) { |
| byte b = srcData[i]; |
| srcData[i] = srcData[i+3]; |
| srcData[i+3] = b; |
| b = srcData[i+1]; |
| srcData[i+1] = srcData[i+2]; |
| srcData[i+2] = b; |
| } |
| } |
| break; |
| default: |
| SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); |
| } |
| if (palette == null) { |
| /* |
| * For some reason, the XImage does not have the mask information. |
| * We must get it from the defualt visual. |
| */ |
| int visual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay)); |
| Visual v = new Visual(); |
| OS.memmove(v, visual, Visual.sizeof); |
| palette = new PaletteData(v.red_mask, v.green_mask, v.blue_mask); |
| } |
| ImageData data = new ImageData(width, height, xSrcImage.bits_per_pixel, palette, 4, srcData); |
| if (transparentPixel == -1 && type == SWT.ICON && mask != 0) { |
| /* Get the icon mask data */ |
| int xMaskPtr = OS.XGetImage(xDisplay, mask, 0, 0, width, height, OS.AllPlanes, OS.ZPixmap); |
| if (xMaskPtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| XImage xMask = new XImage(); |
| OS.memmove(xMask, xMaskPtr, XImage.sizeof); |
| byte[] maskData = new byte[xMask.bytes_per_line * xMask.height]; |
| OS.memmove(maskData, xMask.data, maskData.length); |
| OS.XDestroyImage(xMaskPtr); |
| int maskPad = xMask.bitmap_pad / 8; |
| /* Make mask scanline pad equals to 2 */ |
| data.maskPad = 2; |
| maskData = ImageData.convertPad(maskData, width, height, 1, maskPad, data.maskPad); |
| /* Bit swap the mask data if necessary */ |
| if (xMask.bitmap_bit_order == OS.LSBFirst) { |
| for (int i = 0; i < maskData.length; i++) { |
| byte b = maskData[i]; |
| maskData[i] = (byte)(((b & 0x01) << 7) | ((b & 0x02) << 5) | |
| ((b & 0x04) << 3) | ((b & 0x08) << 1) | ((b & 0x10) >> 1) | |
| ((b & 0x20) >> 3) | ((b & 0x40) >> 5) | ((b & 0x80) >> 7)); |
| } |
| } |
| data.maskData = maskData; |
| } |
| data.transparentPixel = transparentPixel; |
| data.alpha = alpha; |
| if (alpha == -1 && alphaData != null) { |
| data.alphaData = new byte[alphaData.length]; |
| System.arraycopy(alphaData, 0, data.alphaData, 0, alphaData.length); |
| } |
| OS.XDestroyImage(xSrcImagePtr); |
| return data; |
| } |
| /** |
| * Get the offset for the given mask. |
| * |
| * For 24 and 32-bit masks, the offset indicates which byte holds the |
| * data for the given mask (indexed from 0). |
| * For example, in 0x0000FF00, the byte offset is 1. |
| * |
| * For 16-bit masks, the offset indicates which bit holds the most significant |
| * data for the given mask (indexed from 1). |
| * For example, in 0x7E0, the bit offset is 11. |
| * |
| * The different semantics are necessary because 24- and 32-bit images |
| * have their color components aligned on byte boundaries, and 16-bit images |
| * do not. |
| */ |
| static boolean getOffsetForMask(int bitspp, int mask, int byteOrder, int[] poff) { |
| if (bitspp % 8 != 0) { |
| return false; |
| } |
| switch (mask) { |
| /* 24-bit and 32-bit masks */ |
| case 0x000000FF: |
| poff[0] = 0; |
| break; |
| case 0x0000FF00: |
| poff[0] = 1; |
| break; |
| case 0x00FF0000: |
| poff[0] = 2; |
| break; |
| case 0xFF000000: |
| poff[0] = 3; |
| break; |
| /* 16-bit masks */ |
| case 0x001F: |
| poff[0] = 5; |
| break; |
| case 0x03E0: |
| poff[0] = 10; |
| break; |
| case 0x07E0: |
| poff[0] = 11; |
| break; |
| case 0x7C00: |
| poff[0] = 15; |
| break; |
| case 0xF800: |
| poff[0] = 16; |
| break; |
| default: |
| return false; |
| } |
| if (bitspp == 16) { |
| return true; |
| } |
| if (poff[0] >= bitspp / 8) { |
| return false; |
| } |
| if (byteOrder == OS.MSBFirst) { |
| poff[0] = (bitspp/8 - 1) - poff[0]; |
| } |
| return true; |
| } |
| /** |
| * 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 |
| */ |
| public int hashCode () { |
| return pixmap; |
| } |
| void init(int width, int height) { |
| if (width <= 0 || height <= 0) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| |
| /* Create the pixmap */ |
| this.type = SWT.BITMAP; |
| int xDisplay = device.xDisplay; |
| int screen = OS.XDefaultScreenOfDisplay(xDisplay); |
| int depth = OS.XDefaultDepthOfScreen(screen); |
| int screenNum = OS.XDefaultScreen(xDisplay); |
| int drawable = OS.XDefaultRootWindow(xDisplay); |
| int pixmap = OS.XCreatePixmap(xDisplay, drawable, width, height, depth); |
| if (pixmap == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| /* Fill the bitmap with white */ |
| int xGC = OS.XCreateGC(xDisplay, drawable, 0, null); |
| OS.XSetForeground(xDisplay, xGC, OS.XWhitePixel(xDisplay, screenNum)); |
| OS.XFillRectangle(xDisplay, pixmap, xGC, 0, 0, width, height); |
| OS.XFreeGC(xDisplay, xGC); |
| this.pixmap = pixmap; |
| } |
| void init(ImageData image) { |
| if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| int xDisplay = device.xDisplay; |
| int drawable = OS.XDefaultRootWindow(xDisplay); |
| int screenDepth = OS.XDefaultDepthOfScreen(OS.XDefaultScreenOfDisplay(xDisplay)); |
| int visual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay)); |
| int pixmap = OS.XCreatePixmap(xDisplay, drawable, image.width, image.height, screenDepth); |
| if (pixmap == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| int gc = OS.XCreateGC(xDisplay, pixmap, 0, null); |
| int[] transPixel = null; |
| if (image.transparentPixel != -1) transPixel = new int[]{image.transparentPixel}; |
| int error = putImage(image, 0, 0, image.width, image.height, 0, 0, image.width, image.height, xDisplay, visual, screenDepth, device.xcolors, transPixel, false, pixmap, gc); |
| OS.XFreeGC(xDisplay, gc); |
| if (error != 0) { |
| OS.XFreePixmap (xDisplay, pixmap); |
| SWT.error(error); |
| } |
| if (image.getTransparencyType() == SWT.TRANSPARENCY_MASK || image.transparentPixel != -1) { |
| if (image.transparentPixel != -1) transparentPixel = transPixel[0]; |
| ImageData maskImage = image.getTransparencyMask(); |
| int mask = OS.XCreatePixmap(xDisplay, drawable, image.width, image.height, 1); |
| gc = OS.XCreateGC(xDisplay, mask, 0, null); |
| error = putImage(maskImage, 0, 0, maskImage.width, maskImage.height, 0, 0, maskImage.width, maskImage.height, xDisplay, visual, screenDepth, device.xcolors, null, true, mask, gc); |
| OS.XFreeGC(xDisplay, gc); |
| if (error != 0) { |
| OS.XFreePixmap (xDisplay, pixmap); |
| OS.XFreePixmap (xDisplay, mask); |
| SWT.error(error); |
| } |
| this.mask = mask; |
| if (image.getTransparencyType() == SWT.TRANSPARENCY_MASK) { |
| this.type = SWT.ICON; |
| } else { |
| this.type = SWT.BITMAP; |
| } |
| } else { |
| this.type = SWT.BITMAP; |
| this.mask = 0; |
| this.alpha = image.alpha; |
| if (image.alpha == -1 && image.alphaData != null) { |
| this.alphaData = new byte[image.alphaData.length]; |
| System.arraycopy(image.alphaData, 0, this.alphaData, 0, alphaData.length); |
| } |
| createAlphaMask(image.width, image.height); |
| } |
| this.pixmap = pixmap; |
| } |
| /** |
| * 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 |
| * |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| public int internal_new_GC (GCData data) { |
| if (pixmap == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (type != SWT.BITMAP || memGC != null) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| int xDisplay = device.xDisplay; |
| int xGC = OS.XCreateGC (xDisplay, pixmap, 0, null); |
| if (xGC == 0) SWT.error (SWT.ERROR_NO_HANDLES); |
| if (data != null) { |
| int mask = SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT; |
| if ((data.style & mask) == 0) { |
| data.style |= SWT.LEFT_TO_RIGHT; |
| } |
| data.device = device; |
| data.display = xDisplay; |
| data.drawable = pixmap; |
| data.background = device.COLOR_WHITE.handle; |
| data.foreground = device.COLOR_BLACK.handle; |
| data.font = device.systemFont; |
| data.colormap = OS.XDefaultColormap (xDisplay, OS.XDefaultScreen (xDisplay)); |
| data.image = this; |
| } |
| return xGC; |
| } |
| /** |
| * 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 |
| * |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| public void internal_dispose_GC (int gc, GCData data) { |
| int xDisplay = 0; |
| if (data != null) xDisplay = data.display; |
| if (xDisplay == 0 && device != null) xDisplay = device.xDisplay; |
| if (xDisplay == 0) SWT.error (SWT.ERROR_NO_HANDLES); |
| OS.XFreeGC(xDisplay, gc); |
| } |
| /** |
| * 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 (except {@link #dispose()}) using the image. |
| * |
| * @return <code>true</code> when the image is disposed and <code>false</code> otherwise |
| */ |
| public boolean isDisposed() { |
| return pixmap == 0; |
| } |
| public static Image motif_new(Device device, int type, int pixmap, int mask) { |
| Image image = new Image(device); |
| image.type = type; |
| image.pixmap = pixmap; |
| image.mask = mask; |
| return image; |
| } |
| /** |
| * Put a device-independent image of any depth into a drawable of any depth, |
| * stretching if necessary. |
| */ |
| static int putImage(ImageData image, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, int display, int visual, int screenDepth, XColor[] xcolors, int[] transparentPixel, boolean isMask, int drawable, int gc) { |
| 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))) |
| return SWT.ERROR_UNSUPPORTED_DEPTH; |
| |
| boolean flipX = destWidth < 0; |
| boolean flipY = destHeight < 0; |
| if (flipX) { |
| destWidth = -destWidth; |
| destX = destX - destWidth; |
| } |
| if (flipY) { |
| destHeight = -destHeight; |
| destY = destY - destHeight; |
| } |
| byte[] srcReds = null, srcGreens = null, srcBlues = null; |
| if (!palette.isDirect) { |
| RGB[] rgbs = palette.getRGBs(); |
| int length = rgbs.length; |
| srcReds = new byte[length]; |
| srcGreens = new byte[length]; |
| srcBlues = new byte[length]; |
| for (int i = 0; i < rgbs.length; i++) { |
| RGB rgb = rgbs[i]; |
| if (rgb == null) continue; |
| srcReds[i] = (byte)rgb.red; |
| srcGreens[i] = (byte)rgb.green; |
| srcBlues[i] = (byte)rgb.blue; |
| } |
| } |
| byte[] destReds = null, destGreens = null, destBlues = null; |
| int destRedMask = 0, destGreenMask = 0, destBlueMask = 0; |
| final boolean screenDirect; |
| if (screenDepth <= 8) { |
| if (xcolors == null) return SWT.ERROR_UNSUPPORTED_DEPTH; |
| destReds = new byte[xcolors.length]; |
| destGreens = new byte[xcolors.length]; |
| destBlues = new byte[xcolors.length]; |
| for (int i = 0; i < xcolors.length; i++) { |
| XColor color = xcolors[i]; |
| if (color == null) continue; |
| destReds[i] = (byte)((color.red >> 8) & 0xFF); |
| destGreens[i] = (byte)((color.green >> 8) & 0xFF); |
| destBlues[i] = (byte)((color.blue >> 8) & 0xFF); |
| } |
| screenDirect = false; |
| } else { |
| Visual xVisual = new Visual(); |
| OS.memmove(xVisual, visual, Visual.sizeof); |
| destRedMask = xVisual.red_mask; |
| destGreenMask = xVisual.green_mask; |
| destBlueMask = xVisual.blue_mask; |
| screenDirect = true; |
| } |
| if (transparentPixel != null) { |
| int transRed = 0, transGreen = 0, transBlue = 0; |
| if (palette.isDirect) { |
| RGB rgb = palette.getRGB(transparentPixel[0]); |
| transRed = rgb.red; |
| transGreen = rgb.green; |
| transBlue = rgb.blue; |
| } else { |
| RGB[] rgbs = palette.getRGBs(); |
| if (transparentPixel[0] < rgbs.length) { |
| RGB rgb = rgbs[transparentPixel[0]]; |
| transRed = rgb.red; |
| transGreen = rgb.green; |
| transBlue = rgb.blue; |
| } |
| } |
| transparentPixel[0] = ImageData.closestMatch(screenDepth, (byte)transRed, (byte)transGreen, (byte)transBlue, |
| destRedMask, destGreenMask, destBlueMask, destReds, destGreens, destBlues); |
| } |
| |
| /* Depth 1 */ |
| if (image.depth == 1) { |
| int xImagePtr = OS.XCreateImage(display, visual, 1, OS.XYBitmap, 0, 0, destWidth, destHeight, image.scanlinePad * 8, 0); |
| if (xImagePtr == 0) return SWT.ERROR_NO_HANDLES; |
| XImage xImage = new XImage(); |
| OS.memmove(xImage, xImagePtr, XImage.sizeof); |
| int bufSize = xImage.bytes_per_line * xImage.height; |
| int bufPtr = OS.XtMalloc(bufSize); |
| xImage.data = bufPtr; |
| OS.memmove(xImagePtr, xImage, XImage.sizeof); |
| byte[] buf = new byte[bufSize]; |
| ImageData.blit(ImageData.BLIT_SRC, |
| image.data, image.depth, image.bytesPerLine, image.getByteOrder(), srcX, srcY, srcWidth, srcHeight, null, null, null, |
| ImageData.ALPHA_OPAQUE, null, 0, srcX, srcY, |
| buf, xImage.bits_per_pixel, xImage.bytes_per_line, xImage.bitmap_bit_order, 0, 0, destWidth, destHeight, null, null, null, |
| flipX, flipY); |
| OS.memmove(xImage.data, buf, bufSize); |
| |
| int foreground = 1, background = 0; |
| if (!isMask) { |
| foreground = 0; |
| if (srcReds.length > 1) { |
| foreground = ImageData.closestMatch(screenDepth, srcReds[1], srcGreens[1], srcBlues[1], |
| destRedMask, destGreenMask, destBlueMask, destReds, destGreens, destBlues); |
| } |
| if (srcReds.length > 0) { |
| background = ImageData.closestMatch(screenDepth, srcReds[0], srcGreens[0], srcBlues[0], |
| destRedMask, destGreenMask, destBlueMask, destReds, destGreens, destBlues); |
| } |
| } |
| XGCValues values = new XGCValues(); |
| OS.XGetGCValues(display, gc, OS.GCForeground | OS.GCBackground, values); |
| OS.XSetForeground(display, gc, foreground); |
| OS.XSetBackground(display, gc, background); |
| OS.XPutImage(display, drawable, gc, xImagePtr, 0, 0, destX, destY, destWidth, destHeight); |
| OS.XSetForeground(display, gc, values.foreground); |
| OS.XSetBackground(display, gc, values.background); |
| OS.XDestroyImage(xImagePtr); |
| return 0; |
| } |
| |
| /* Depths other than 1 */ |
| int xImagePtr = OS.XCreateImage(display, visual, screenDepth, OS.ZPixmap, 0, 0, destWidth, destHeight, image.scanlinePad * 8, 0); |
| if (xImagePtr == 0) return SWT.ERROR_NO_HANDLES; |
| XImage xImage = new XImage(); |
| OS.memmove(xImage, xImagePtr, XImage.sizeof); |
| int bufSize = xImage.bytes_per_line * xImage.height; |
| int bufPtr = OS.XtMalloc(bufSize); |
| xImage.data = bufPtr; |
| OS.memmove(xImagePtr, xImage, XImage.sizeof); |
| byte[] buf = new byte[bufSize]; |
| if (palette.isDirect) { |
| if (screenDirect) { |
| ImageData.blit(ImageData.BLIT_SRC, |
| image.data, image.depth, image.bytesPerLine, image.getByteOrder(), srcX, srcY, srcWidth, srcHeight, palette.redMask, palette.greenMask, palette.blueMask, |
| ImageData.ALPHA_OPAQUE, null, 0, srcX, srcY, |
| buf, xImage.bits_per_pixel, xImage.bytes_per_line, xImage.byte_order, 0, 0, destWidth, destHeight, xImage.red_mask, xImage.green_mask, xImage.blue_mask, |
| flipX, flipY); |
| } else { |
| ImageData.blit(ImageData.BLIT_SRC, |
| image.data, image.depth, image.bytesPerLine, image.getByteOrder(), srcX, srcY, srcWidth, srcHeight, palette.redMask, palette.greenMask, palette.blueMask, |
| ImageData.ALPHA_OPAQUE, null, 0, srcX, srcY, |
| buf, xImage.bits_per_pixel, xImage.bytes_per_line, xImage.byte_order, 0, 0, destWidth, destHeight, destReds, destGreens, destBlues, |
| flipX, flipY); |
| } |
| } else { |
| if (screenDirect) { |
| ImageData.blit(ImageData.BLIT_SRC, |
| image.data, image.depth, image.bytesPerLine, image.getByteOrder(), srcX, srcY, srcWidth, srcHeight, srcReds, srcGreens, srcBlues, |
| ImageData.ALPHA_OPAQUE, null, 0, srcX, srcY, |
| buf, xImage.bits_per_pixel, xImage.bytes_per_line, xImage.byte_order, 0, 0, destWidth, destHeight, xImage.red_mask, xImage.green_mask, xImage.blue_mask, |
| flipX, flipY); |
| } else { |
| ImageData.blit(ImageData.BLIT_SRC, |
| image.data, image.depth, image.bytesPerLine, image.getByteOrder(), srcX, srcY, srcWidth, srcHeight, srcReds, srcGreens, srcBlues, |
| ImageData.ALPHA_OPAQUE, null, 0, srcX, srcY, |
| buf, xImage.bits_per_pixel, xImage.bytes_per_line, xImage.byte_order, 0, 0, destWidth, destHeight, destReds, destGreens, destBlues, |
| flipX, flipY); |
| } |
| } |
| OS.memmove(xImage.data, buf, bufSize); |
| OS.XPutImage(display, drawable, gc, xImagePtr, 0, 0, destX, destY, destWidth, destHeight); |
| OS.XDestroyImage(xImagePtr); |
| return 0; |
| } |
| /** |
| * 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; |
| /* Generate the mask if necessary. */ |
| if (mask == 0) createMask(); |
| Rectangle bounds = getBounds(); |
| int[] unused = new int[1]; |
| int[] depth = new int[1]; |
| int xDisplay = device.xDisplay; |
| OS.XGetGeometry(xDisplay, pixmap, unused, unused, unused, unused, unused, unused, depth); |
| int drawable = OS.XDefaultRootWindow(xDisplay); |
| int tempPixmap = OS.XCreatePixmap(xDisplay, drawable, bounds.width, bounds.height, depth[0]); |
| int xGC = OS.XCreateGC(xDisplay, tempPixmap, 0, null); |
| OS.XSetForeground(xDisplay, xGC, color.handle.pixel); |
| OS.XFillRectangle(xDisplay, tempPixmap, xGC, 0, 0, bounds.width, bounds.height); |
| OS.XSetClipMask(xDisplay, xGC, mask); |
| OS.XCopyArea(xDisplay, pixmap, tempPixmap, xGC, 0, 0, bounds.width, bounds.height, 0, 0); |
| OS.XSetClipMask(xDisplay, xGC, OS.None); |
| OS.XCopyArea(xDisplay, tempPixmap, pixmap, xGC, 0, 0, bounds.width, bounds.height, 0, 0); |
| OS.XFreePixmap(xDisplay, tempPixmap); |
| OS.XFreeGC(xDisplay, xGC); |
| /* Destroy the receiver's mask if the there is a GC created on it */ |
| if (memGC != null) destroyMask(); |
| } |
| /** |
| * Returns a string containing a concise, human-readable |
| * description of the receiver. |
| * |
| * @return a string representation of the receiver |
| */ |
| public String toString () { |
| if (isDisposed()) return "Image {*DISPOSED*}"; |
| return "Image {" + pixmap + "}"; |
| } |
| } |