| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.photon.*; |
| 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 |
| */ |
| 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>) |
| */ |
| public int type; |
| |
| /** |
| * the handle to the OS image 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> |
| */ |
| public int handle; |
| |
| /** |
| * specifies the transparent pixel |
| */ |
| int transparentPixel = -1; |
| |
| /** |
| * the GC which is drawing on the image |
| */ |
| GC memGC; |
| |
| /** |
| * specifies the default scanline padding |
| */ |
| static final int DEFAULT_SCANLINE_PAD = 4; |
| |
| Image () { |
| } |
| |
| /** |
| * 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) { |
| if (device == null) device = Device.getDevice(); |
| if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| init(device, width, height); |
| if (device.tracking) device.new_Object(this); |
| } |
| |
| /** |
| * 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>IMAGE_COPY</b></dt> |
| * <dd>the result is an identical copy of srcImage</dd> |
| * <dt><b>IMAGE_DISABLE</b></dt> |
| * <dd>the result is a copy of srcImage which has a <em>disabled</em> look</dd> |
| * <dt><b>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) { |
| if (device == null) device = Device.getDevice(); |
| if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| this.device = device; |
| if (srcImage == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (srcImage.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| switch (flag) { |
| case SWT.IMAGE_COPY: |
| case SWT.IMAGE_DISABLE: |
| this.type = srcImage.type; |
| int srcHandle = srcImage.handle; |
| int newHandle = OS.PiDuplicateImage (srcHandle, 0); |
| if (newHandle == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| if (flag == SWT.IMAGE_COPY) { |
| /* |
| * Bug in Photon. The image returned by PiDuplicateImage might |
| * have the same mask_bm/alpha as the original image. The fix |
| * is to detect this case and copy mask_bm/alpha if necessary. |
| */ |
| PhImage_t phImage = new PhImage_t(); |
| OS.memmove (phImage, srcHandle, PhImage_t.sizeof); |
| PhImage_t newPhImage = new PhImage_t(); |
| OS.memmove(newPhImage, newHandle, PhImage_t.sizeof); |
| if (newPhImage.mask_bm != 0 && phImage.mask_bm == newPhImage.mask_bm) { |
| int length = newPhImage.mask_bpl * newPhImage.size_h; |
| int ptr = OS.malloc(length); |
| OS.memmove(ptr, newPhImage.mask_bm, length); |
| newPhImage.mask_bm = ptr; |
| } |
| if (newPhImage.alpha != 0 && phImage.alpha == newPhImage.alpha) { |
| PgAlpha_t alpha = new PgAlpha_t(); |
| OS.memmove(alpha, phImage.alpha, PgAlpha_t.sizeof); |
| if (alpha.src_alpha_map_map != 0) { |
| int length = alpha.src_alpha_map_bpl * alpha.src_alpha_map_dim_h; |
| int ptr = OS.malloc(length); |
| OS.memmove(ptr, alpha.src_alpha_map_map, length); |
| alpha.src_alpha_map_map = ptr; |
| } |
| int ptr = OS.malloc(PgAlpha_t.sizeof); |
| OS.memmove(ptr, alpha, PgAlpha_t.sizeof); |
| newPhImage.alpha = ptr; |
| } |
| OS.memmove(newHandle, newPhImage, PhImage_t.sizeof); |
| transparentPixel = srcImage.transparentPixel; |
| } else { |
| PhImage_t phImage = new PhImage_t(); |
| OS.PhMakeGhostBitmap(newHandle); |
| OS.memmove (phImage, newHandle, PhImage_t.sizeof); |
| phImage.mask_bm = phImage.ghost_bitmap; |
| phImage.mask_bpl = phImage.ghost_bpl; |
| phImage.ghost_bitmap = 0; |
| phImage.ghost_bpl = 0; |
| phImage.alpha = 0; |
| OS.memmove (newHandle, phImage, PhImage_t.sizeof); |
| } |
| handle = newHandle; |
| if (device.tracking) device.new_Object(this); |
| return; |
| case SWT.IMAGE_GRAY: |
| Rectangle r = srcImage.getBounds(); |
| 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(r.width, r.height, 8, new PaletteData(rgbs)); |
| newData.maskData = data.maskData; |
| newData.maskPad = data.maskPad; |
| if (data.transparentPixel != -1) newData.transparentPixel = 254; |
| |
| /* Convert the pixels. */ |
| int[] scanline = new int[r.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<r.height; y++) { |
| int offset = y * newData.bytesPerLine; |
| data.getPixels(0, y, r.width, scanline, 0); |
| for (int x=0; x<r.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 (device, newData); |
| if (device.tracking) device.new_Object(this); |
| return; |
| default: |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| } |
| |
| /** |
| * 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) { |
| if (device == null) device = Device.getDevice(); |
| if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| init(device, bounds.width, bounds.height); |
| if (device.tracking) device.new_Object(this); |
| } |
| |
| /** |
| * 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) { |
| if (device == null) device = Device.getDevice(); |
| if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| init(device, data); |
| if (device.tracking) device.new_Object(this); |
| } |
| |
| /** |
| * 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) { |
| if (device == null) device = Device.getDevice(); |
| if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| 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(device, image); |
| if (device.tracking) device.new_Object(this); |
| } |
| |
| /** |
| * 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_INVALID_IMAGE - if the image file contains invalid data </li> |
| * <li>ERROR_IO - if an IO error occurs while reading data</li> |
| * <li>ERROR_UNSUPPORTED_DEPTH - if the InputStream 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, InputStream stream) { |
| if (device == null) device = Device.getDevice(); |
| if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| init(device, new ImageData(stream)); |
| if (device.tracking) device.new_Object(this); |
| } |
| |
| /** |
| * 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_INVALID_IMAGE - if the image file contains invalid data </li> |
| * <li>ERROR_IO - if an IO error occurs while reading data</li> |
| * <li>ERROR_UNSUPPORTED_DEPTH - if the image file has 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) { |
| if (device == null) device = Device.getDevice(); |
| if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| init(device, new ImageData(filename)); |
| if (device.tracking) device.new_Object(this); |
| } |
| |
| /** |
| * Disposes of the operating system resources associated with |
| * the image. Applications must dispose of all images which |
| * they allocate. |
| */ |
| public void dispose () { |
| if (handle == 0) return; |
| if (device.isDisposed()) return; |
| if (memGC != null) memGC.dispose(); |
| destroyImage(handle); |
| handle = 0; |
| memGC = null; |
| if (device.tracking) device.dispose_Object(this); |
| device = 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 |
| */ |
| public boolean equals (Object object) { |
| if (object == this) return true; |
| if (!(object instanceof Image)) return false; |
| Image image = (Image) object; |
| return device == image.device && handle == image.handle; |
| } |
| |
| /** |
| * 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; |
| |
| PhImage_t phImage = new PhImage_t(); |
| OS.memmove(phImage, handle, PhImage_t.sizeof); |
| int color = 0; |
| if ((phImage.type & OS.Pg_IMAGE_CLASS_MASK) == OS.Pg_IMAGE_CLASS_PALETTE) { |
| int phPalette = phImage.palette; |
| if (phPalette == 0 || transparentPixel > phImage.colors) return null; |
| int[] pgColor = new int[1]; |
| OS.memmove(pgColor, phPalette + (transparentPixel * 4), 4); |
| color = pgColor[0]; |
| } else { |
| switch (phImage.type) { |
| case OS.Pg_IMAGE_DIRECT_888: |
| color = ((transparentPixel & 0xFF) << 16) | (transparentPixel & 0xFF00) | ((transparentPixel & 0xFF0000) >> 16); |
| break; |
| case OS.Pg_IMAGE_DIRECT_8888: |
| color = ((transparentPixel & 0xFF00) << 8) | ((transparentPixel & 0xFF0000) >> 8) | ((transparentPixel & 0xFF000000) >> 24); |
| break; |
| case OS.Pg_IMAGE_DIRECT_565: |
| color = ((transparentPixel & 0xF800) << 8) | ((transparentPixel & 0x7E0) << 5) | ((transparentPixel & 0x1F) << 3); |
| break; |
| case OS.Pg_IMAGE_DIRECT_555: |
| color = ((transparentPixel & 0x7C00) << 9) | ((transparentPixel & 0x3E0) << 6) | ((transparentPixel & 0x1F) << 3); |
| break; |
| case OS.Pg_IMAGE_DIRECT_444: |
| color = ((transparentPixel & 0xF00) << 12) | ((transparentPixel & 0xF0) << 8) | ((transparentPixel & 0xF) << 4); |
| break; |
| default: |
| return null; |
| } |
| } |
| return Color.photon_new(device, color); |
| } |
| |
| /** |
| * 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); |
| PhImage_t image = new PhImage_t(); |
| OS.memmove(image, handle, PhImage_t.sizeof); |
| return new Rectangle(0, 0, image.size_w, image.size_h); |
| } |
| |
| /** |
| * 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); |
| if (memGC != null) memGC.flushImage(); |
| PhImage_t phImage = new PhImage_t(); |
| OS.memmove(phImage, handle, PhImage_t.sizeof); |
| int depth = 0; |
| PaletteData palette = null; |
| switch (phImage.type) { |
| case OS.Pg_IMAGE_DIRECT_555: |
| depth = 16; |
| palette = new PaletteData(0x7C00,0x3E0,0x1F); |
| break; |
| case OS.Pg_IMAGE_DIRECT_565: |
| depth = 16; |
| palette = new PaletteData(0xF800,0x7E0,0x1F); |
| break; |
| case OS.Pg_IMAGE_DIRECT_444: |
| depth = 16; |
| palette = new PaletteData(0xF00,0xF0,0xF); |
| break; |
| case OS.Pg_IMAGE_DIRECT_888: |
| depth = 24; |
| palette = new PaletteData(0xFF,0xFF00,0xFF0000); |
| break; |
| case OS.Pg_IMAGE_DIRECT_8888: |
| depth = 32; |
| palette = new PaletteData(0xFF00,0xFF0000,0xFF000000); |
| break; |
| case -1: |
| depth = 1; |
| palette = new PaletteData(new RGB[] {new RGB(0,0,0), new RGB(255,255,255)}); |
| break; |
| case OS.Pg_IMAGE_PALETTE_NIBBLE: |
| case OS.Pg_IMAGE_PALETTE_BYTE: |
| depth = phImage.type == OS.Pg_IMAGE_PALETTE_BYTE ? 8 : 4; |
| RGB[] rgbs = new RGB[phImage.colors]; |
| int[] colors = new int[phImage.colors]; |
| OS.memmove(colors, phImage.palette, colors.length * 4); |
| for (int i = 0; i < rgbs.length; i++) { |
| int rgb = colors[i]; |
| rgbs[i] = new RGB((rgb & 0xFF0000) >> 16, (rgb & 0xFF00) >> 8, rgb & 0xFF); |
| } |
| palette = new PaletteData(rgbs); |
| break; |
| default: |
| SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); |
| } |
| |
| int scanLinePad, bpl = phImage.bpl; |
| int width = phImage.size_w, height = phImage.size_h; |
| int dataBytesPerLine = (width * depth + 7) / 8; |
| for (scanLinePad = 1; scanLinePad < 128; scanLinePad++) { |
| int calcBpl = (dataBytesPerLine + (scanLinePad - 1)) / scanLinePad * scanLinePad; |
| if (bpl == calcBpl) break; |
| } |
| byte[] data = new byte[height * bpl]; |
| OS.memmove(data, phImage.image, data.length); |
| |
| ImageData imageData = new ImageData(width, height, depth, palette, scanLinePad, data); |
| |
| if (transparentPixel != -1) { |
| imageData.transparentPixel = transparentPixel; |
| } else if (phImage.mask_bm != 0) { |
| imageData.maskData = new byte[height * phImage.mask_bpl]; |
| OS.memmove(imageData.maskData, phImage.mask_bm, imageData.maskData.length); |
| imageData.maskPad = 2; |
| } else if (phImage.alpha != 0) { |
| PgAlpha_t alpha = new PgAlpha_t(); |
| OS.memmove(alpha, phImage.alpha, PgAlpha_t.sizeof); |
| imageData.alpha = alpha.src_global_alpha; |
| if ((alpha.alpha_op & OS.Pg_ALPHA_OP_SRC_MAP) != 0 && alpha.src_alpha_map_map != 0) { |
| int length = alpha.src_alpha_map_dim_w * alpha.src_alpha_map_dim_h; |
| imageData.alphaData = new byte[length]; |
| OS.memmove(imageData.alphaData, alpha.src_alpha_map_map, length); |
| } |
| } |
| |
| return imageData; |
| } |
| |
| /** |
| * 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 handle; |
| } |
| |
| void init(Device device, int width, int height) { |
| if (width <= 0 || height <= 0) { |
| SWT.error (SWT.ERROR_INVALID_ARGUMENT); |
| } |
| this.device = device; |
| this.type = SWT.BITMAP; |
| |
| handle = OS.PhCreateImage(null, (short)width, (short)height, OS.Pg_IMAGE_DIRECT_888, 0, 0, 0); |
| if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| |
| void init(Device device, ImageData i) { |
| if (i == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| this.device = device; |
| |
| /* |
| * Feature in Photon. Photon does not support 2-bit depth images and |
| * memory contexts can not be created on 1 & 4-bit depth images. The |
| * fix is to create 8-bit depth images instead. |
| */ |
| if ((i.depth == 1 || i.depth == 2 || i.depth == 4) && !i.palette.isDirect) { |
| ImageData img = new ImageData(i.width, i.height, 8, i.palette); |
| ImageData.blit(ImageData.BLIT_SRC, |
| i.data, i.depth, i.bytesPerLine, img.getByteOrder(), 0, 0, i.width, i.height, null, null, null, |
| ImageData.ALPHA_OPAQUE, null, 0, 0, 0, |
| img.data, img.depth, img.bytesPerLine, img.getByteOrder(), 0, 0, img.width, img.height, null, null, null, |
| false, false); |
| img.transparentPixel = i.transparentPixel; |
| img.maskPad = i.maskPad; |
| img.maskData = i.maskData; |
| img.alpha = i.alpha; |
| img.alphaData = i.alphaData; |
| i = img; |
| } |
| |
| int type = 0; |
| int[] phPalette = null; |
| if (!i.palette.isDirect) { |
| switch (i.depth) { |
| case 4: type = OS.Pg_IMAGE_PALETTE_NIBBLE; break; |
| case 8: type = OS.Pg_IMAGE_PALETTE_BYTE; break; |
| default: SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); |
| } |
| RGB[] rgbs = i.palette.getRGBs(); |
| phPalette = new int[rgbs.length]; |
| for (int j=0; j<rgbs.length; j++) { |
| RGB rgb = rgbs[j]; |
| phPalette[j] = ((rgb.red & 0xFF) << 16) | ((rgb.green & 0xFF) << 8) | (rgb.blue & 0xFF); |
| } |
| } else { |
| final PaletteData palette = i.palette; |
| final int redMask = palette.redMask; |
| final int greenMask = palette.greenMask; |
| final int blueMask = palette.blueMask; |
| int newDepth = i.depth; |
| int newOrder = ImageData.MSB_FIRST; |
| PaletteData newPalette = null; |
| |
| switch (i.depth) { |
| case 8: |
| newDepth = 16; |
| newOrder = ImageData.LSB_FIRST; |
| newPalette = new PaletteData(0xF800, 0x7E0, 0x1F); |
| type = OS.Pg_IMAGE_DIRECT_565; |
| break; |
| case 16: |
| newOrder = ImageData.LSB_FIRST; |
| if (redMask == 0x7C00 && greenMask == 0x3E0 && blueMask == 0x1F) { |
| type = OS.Pg_IMAGE_DIRECT_555; |
| } else if (redMask == 0xF800 && greenMask == 0x7E0 && blueMask == 0x1F) { |
| type = OS.Pg_IMAGE_DIRECT_565; |
| } else if (redMask == 0xF00 && greenMask == 0xF0 && blueMask == 0xF) { |
| type = OS.Pg_IMAGE_DIRECT_444; |
| } else { |
| type = OS.Pg_IMAGE_DIRECT_565; |
| newPalette = new PaletteData(0xF800, 0x7E0, 0x1F); |
| } |
| break; |
| case 24: |
| if (redMask == 0xFF && greenMask == 0xFF00 && blueMask == 0xFF0000) { |
| type = OS.Pg_IMAGE_DIRECT_888; |
| } else { |
| type = OS.Pg_IMAGE_DIRECT_888; |
| newPalette = new PaletteData(0xFF, 0xFF00, 0xFF0000); |
| } |
| break; |
| case 32: |
| if (redMask == 0xFF00 && greenMask == 0xFF0000 && blueMask == 0xFF000000) { |
| type = OS.Pg_IMAGE_DIRECT_8888; |
| } else { |
| type = OS.Pg_IMAGE_DIRECT_8888; |
| newPalette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000); |
| } |
| break; |
| default: |
| SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); |
| } |
| if (newPalette != null) { |
| ImageData img = new ImageData(i.width, i.height, newDepth, newPalette); |
| ImageData.blit(ImageData.BLIT_SRC, |
| i.data, i.depth, i.bytesPerLine, i.getByteOrder(), 0, 0, i.width, i.height, redMask, greenMask, blueMask, |
| ImageData.ALPHA_OPAQUE, null, 0, 0, 0, |
| img.data, img.depth, img.bytesPerLine, newOrder, 0, 0, img.width, img.height, newPalette.redMask, newPalette.greenMask, newPalette.blueMask, |
| false, false); |
| if (i.transparentPixel != -1) { |
| img.transparentPixel = newPalette.getPixel(palette.getRGB(i.transparentPixel)); |
| } |
| img.maskPad = i.maskPad; |
| img.maskData = i.maskData; |
| img.alpha = i.alpha; |
| img.alphaData = i.alphaData; |
| i = img; |
| } |
| } |
| int handle = OS.malloc(PhImage_t.sizeof); |
| if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| PhImage_t phImage = new PhImage_t(); |
| phImage.type = type; |
| phImage.flags = (byte)OS.Ph_RELEASE_IMAGE_ALL; |
| int size = i.data.length; |
| int ptr = OS.malloc(size); |
| if (ptr == 0) { |
| OS.free(handle); |
| SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| OS.memmove(ptr, i.data, size); |
| phImage.image = ptr; |
| phImage.size_w = (short)i.width; |
| phImage.size_h = (short)i.height; |
| phImage.bpl = i.bytesPerLine; |
| if (phPalette != null) { |
| size = phPalette.length * 4; |
| ptr = OS.malloc(size); |
| if (ptr == 0) { |
| OS.free(phImage.image); |
| OS.free(handle); |
| SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| OS.memmove(ptr, phPalette, size); |
| phImage.palette = ptr; |
| phImage.colors = phPalette.length; |
| } |
| if (i.getTransparencyType() == SWT.TRANSPARENCY_MASK) { |
| this.type = SWT.ICON; |
| int maskBpl = (i.width * 1 + 7) / 8; |
| maskBpl = (maskBpl + (i.maskPad - 1)) / i.maskPad * i.maskPad; |
| size = maskBpl * i.height; |
| ptr = OS.malloc(size); |
| if (ptr == 0) { |
| if (phImage.palette != 0) OS.free(phImage.palette); |
| OS.free(phImage.image); |
| OS.free(handle); |
| SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| OS.memmove(ptr, i.maskData, size); |
| phImage.mask_bm = ptr; |
| phImage.mask_bpl = maskBpl; |
| } else { |
| this.type = SWT.BITMAP; |
| if (i.transparentPixel != -1) { |
| /* |
| * The PhImage_t field transparent can not used to store the |
| * transparent pixel because it is overwritten when a GC is |
| * created on the image. |
| */ |
| transparentPixel = i.transparentPixel; |
| } else if (i.alpha != -1 || i.alphaData != null) { |
| PgAlpha_t alpha = new PgAlpha_t(); |
| alpha.alpha_op = i.alpha != -1 ? OS.Pg_ALPHA_OP_SRC_GLOBAL : OS.Pg_ALPHA_OP_SRC_MAP; |
| alpha.alpha_op |= OS.Pg_BLEND_SRC_SRC_ALPHA | OS.Pg_BLEND_DST_ONE_MINUS_SRC_ALPHA; |
| alpha.src_global_alpha = (byte)i.alpha; |
| if (i.alpha == -1 && i.alphaData != null) { |
| ptr = OS.malloc(i.alphaData.length); |
| if (ptr == 0) { |
| if (phImage.palette != 0) OS.free(phImage.palette); |
| OS.free(phImage.image); |
| OS.free(handle); |
| SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| OS.memmove(ptr, i.alphaData, i.alphaData.length); |
| alpha.src_alpha_map_bpl = (short)i.width; |
| alpha.src_alpha_map_dim_w = (short)i.width; |
| alpha.src_alpha_map_dim_h = (short)i.height; |
| alpha.src_alpha_map_map = ptr; |
| } |
| ptr = OS.malloc(PgAlpha_t.sizeof); |
| if (ptr == 0) { |
| if (alpha.src_alpha_map_map != 0) OS.free(alpha.src_alpha_map_map); |
| if (phImage.palette != 0) OS.free(phImage.palette); |
| OS.free(phImage.image); |
| OS.free(handle); |
| SWT.error(SWT.ERROR_NO_HANDLES); |
| } |
| OS.memmove(ptr, alpha, PgAlpha_t.sizeof); |
| phImage.alpha = ptr; |
| } |
| } |
| OS.memmove(handle, phImage, PhImage_t.sizeof); |
| this.handle = handle; |
| } |
| |
| /** |
| * 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 int internal_new_GC (GCData data) { |
| if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| /* |
| * Create a new GC that can draw into the image. |
| * Only supported for bitmaps. |
| */ |
| if (type != SWT.BITMAP || memGC != null) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| |
| PhImage_t phImage = new PhImage_t(); |
| OS.memmove(phImage, handle, PhImage_t.sizeof); |
| PhDim_t dim = new PhDim_t(); |
| dim.w = phImage.size_w; |
| dim.h = phImage.size_h; |
| PhPoint_t trans = new PhPoint_t(); |
| int pmMC = OS.PmMemCreateMC(handle, dim, trans); |
| if (pmMC == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| 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.image = this; |
| return pmMC; |
| } |
| |
| /** |
| * 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 (int pmMC, GCData data) { |
| OS.PmMemReleaseMC(pmMC); |
| } |
| |
| /** |
| * 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 |
| */ |
| public boolean isDisposed() { |
| return handle == 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; |
| |
| PhImage_t phImage = new PhImage_t(); |
| OS.memmove(phImage, handle, PhImage_t.sizeof); |
| int phPalette = phImage.palette; |
| if (phPalette == 0 || transparentPixel > phImage.colors) return; |
| int[] pgColor = new int[]{ color.handle }; |
| OS.memmove(phPalette + (transparentPixel * 4), pgColor, 4); |
| } |
| |
| static void destroyImage(int image) { |
| if (image == 0) return; |
| PhImage_t phImage = new PhImage_t(); |
| OS.memmove(phImage, image, PhImage_t.sizeof); |
| phImage.flags = (byte)OS.Ph_RELEASE_IMAGE_ALL; |
| OS.memmove(image, phImage, PhImage_t.sizeof); |
| OS.PhReleaseImage(image); |
| OS.free(image); |
| } |
| |
| public static Image photon_new(Device device, int type, int handle) { |
| if (device == null) device = Device.getDevice(); |
| Image image = new Image(); |
| image.type = type; |
| image.handle = handle; |
| image.device = device; |
| return image; |
| } |
| |
| /** |
| * 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 {" + handle + "}"; |
| } |
| |
| } |