| /******************************************************************************* |
| * Copyright (c) 2000, 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| |
| import java.io.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.cairo.*; |
| import org.eclipse.swt.internal.gtk.*; |
| |
| /** |
| * 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 long /*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 long /*int*/ mask; |
| |
| /** |
| * The handle to the OS cairo surface 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 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; |
| |
| /** |
| * ImageFileNameProvider to provide file names at various Zoom levels |
| */ |
| private ImageFileNameProvider imageFileNameProvider; |
| |
| /** |
| * ImageDataProvider to provide ImageData at various Zoom levels |
| */ |
| private ImageDataProvider imageDataProvider; |
| |
| /** |
| * Style flag used to differentiate normal, gray-scale and disabled images based |
| * on image data providers. Without this, a normal and a disabled image of the |
| * same image data provider would be considered equal. |
| */ |
| private int styleFlag = SWT.IMAGE_COPY; |
| |
| /** |
| * Attribute to cache current device zoom level |
| */ |
| private int currentDeviceZoom = 100; |
| |
| Image(Device device) { |
| super(device); |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| } |
| |
| /** |
| * 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> |
| * <p> |
| * You must dispose the image when it is no longer required. |
| * </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> |
| * |
| * @see #dispose() |
| */ |
| public Image(Device device, int width, int height) { |
| super(device); |
| Point size = DPIUtil.autoScaleUp(new Point(width, height)); |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| init(size.x, size.y); |
| 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> |
| * <p> |
| * You must dispose the image when it is no longer required. |
| * </p> |
| * |
| * @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> |
| * |
| * @see #dispose() |
| */ |
| public Image(Device device, Image srcImage, int flag) { |
| super(device); |
| if (srcImage == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (srcImage.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| switch (flag) { |
| case SWT.IMAGE_COPY: |
| case SWT.IMAGE_DISABLE: |
| case SWT.IMAGE_GRAY: |
| break; |
| default: |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| device = this.device; |
| this.type = srcImage.type; |
| this.imageDataProvider = srcImage.imageDataProvider; |
| this.imageFileNameProvider = srcImage.imageFileNameProvider; |
| this.styleFlag = srcImage.styleFlag | flag; |
| this.currentDeviceZoom = srcImage.currentDeviceZoom; |
| |
| if (flag != SWT.IMAGE_DISABLE) 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); |
| } |
| |
| long /*int*/ imageSurface = srcImage.surface; |
| int width = this.width = srcImage.width; |
| int height = this.height = srcImage.height; |
| int format = Cairo.cairo_surface_get_content(imageSurface) == Cairo.CAIRO_CONTENT_COLOR ? Cairo.CAIRO_FORMAT_RGB24 : Cairo.CAIRO_FORMAT_ARGB32; |
| boolean hasAlpha = format == Cairo.CAIRO_FORMAT_ARGB32; |
| surface = Cairo.cairo_image_surface_create(format, width, height); |
| if (surface == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| if (DPIUtil.useCairoAutoScale()) { |
| double scaleFactor = DPIUtil.getDeviceZoom() / 100f; |
| Cairo.cairo_surface_set_device_scale(surface, scaleFactor, scaleFactor); |
| } |
| long /*int*/ cairo = Cairo.cairo_create(surface); |
| if (cairo == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| Cairo.cairo_set_operator(cairo, Cairo.CAIRO_OPERATOR_SOURCE); |
| Cairo.cairo_set_source_surface (cairo, imageSurface, 0, 0); |
| Cairo.cairo_paint (cairo); |
| Cairo.cairo_destroy(cairo); |
| if (flag != SWT.IMAGE_COPY) { |
| int stride = Cairo.cairo_image_surface_get_stride(surface); |
| long /*int*/ data = Cairo.cairo_image_surface_get_data(surface); |
| int oa, or, og, ob; |
| if (OS.BIG_ENDIAN) { |
| oa = 0; or = 1; og = 2; ob = 3; |
| } else { |
| oa = 3; or = 2; og = 1; ob = 0; |
| } |
| switch (flag) { |
| case SWT.IMAGE_DISABLE: { |
| Color zeroColor = device.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW); |
| RGB zeroRGB = zeroColor.getRGB(); |
| int zeroRed = zeroRGB.red; |
| int zeroGreen = zeroRGB.green; |
| int zeroBlue = zeroRGB.blue; |
| Color oneColor = device.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND); |
| RGB oneRGB = oneColor.getRGB(); |
| int oneRed = oneRGB.red; |
| int oneGreen = oneRGB.green; |
| int oneBlue = oneRGB.blue; |
| byte[] line = new byte[stride]; |
| for (int y=0; y<height; y++) { |
| C.memmove(line, data + (y * stride), stride); |
| for (int x=0, offset=0; x<width; x++, offset += 4) { |
| int a = line[offset + oa] & 0xFF; |
| int r = line[offset + or] & 0xFF; |
| int g = line[offset + og] & 0xFF; |
| int b = line[offset + ob] & 0xFF; |
| if (hasAlpha && a != 0) { |
| r = ((r * 0xFF) + a / 2) / a; |
| g = ((g * 0xFF) + a / 2) / a; |
| b = ((b * 0xFF) + a / 2) / a; |
| } |
| int intensity = r * r + g * g + b * b; |
| if (intensity < 98304) { |
| r = zeroRed; |
| g = zeroGreen; |
| b = zeroBlue; |
| } else { |
| r = oneRed; |
| g = oneGreen; |
| b = oneBlue; |
| } |
| if (hasAlpha) { |
| /* pre-multiplied alpha */ |
| r = (r * a) + 128; |
| r = (r + (r >> 8)) >> 8; |
| g = (g * a) + 128; |
| g = (g + (g >> 8)) >> 8; |
| b = (b * a) + 128; |
| b = (b + (b >> 8)) >> 8; |
| } |
| line[offset + or] = (byte)r; |
| line[offset + og] = (byte)g; |
| line[offset + ob] = (byte)b; |
| } |
| C.memmove(data + (y * stride), line, stride); |
| } |
| break; |
| } |
| case SWT.IMAGE_GRAY: { |
| byte[] line = new byte[stride]; |
| for (int y=0; y<height; y++) { |
| C.memmove(line, data + (y * stride), stride); |
| for (int x=0, offset = 0; x<width; x++, offset += 4) { |
| int a = line[offset + oa] & 0xFF; |
| int r = line[offset + or] & 0xFF; |
| int g = line[offset + og] & 0xFF; |
| int b = line[offset + ob] & 0xFF; |
| if (hasAlpha && a != 0) { |
| r = ((r * 0xFF) + a / 2) / a; |
| g = ((g * 0xFF) + a / 2) / a; |
| b = ((b * 0xFF) + a / 2) / a; |
| } |
| int intensity = (r+r+g+g+g+g+g+b) >> 3; |
| if (hasAlpha) { |
| /* pre-multiplied alpha */ |
| intensity = (intensity * a) + 128; |
| intensity = (intensity + (intensity >> 8)) >> 8; |
| } |
| line[offset+or] = line[offset+og] = line[offset+ob] = (byte)intensity; |
| } |
| C.memmove(data + (y * stride), line, stride); |
| } |
| break; |
| } |
| } |
| } |
| 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> |
| * <p> |
| * You must dispose the image when it is no longer required. |
| * </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> |
| * |
| * @see #dispose() |
| */ |
| public Image(Device device, Rectangle bounds) { |
| super(device); |
| if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| Rectangle bounds1 = DPIUtil.autoScaleUp (bounds); |
| init(bounds1.width, bounds1.height); |
| init(); |
| } |
| |
| /** |
| * Constructs an instance of this class from the given |
| * <code>ImageData</code>. |
| * <p> |
| * You must dispose the image when it is no longer required. |
| * </p> |
| * |
| * @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> |
| * |
| * @see #dispose() |
| */ |
| public Image(Device device, ImageData data) { |
| super(device); |
| if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| data = DPIUtil.autoScaleUp (device, data); |
| init(data); |
| init(); |
| } |
| |
| /** |
| * Constructs an instance of this class, whose type is |
| * <code>SWT.ICON</code>, from the two given <code>ImageData</code> |
| * objects. The two images must be the same size. Pixel transparency |
| * in either image will be ignored. |
| * <p> |
| * The mask image should contain white wherever the icon is to be visible, |
| * and black wherever the icon is to be transparent. In addition, |
| * the source image should contain black wherever the icon is to be |
| * transparent. |
| * </p> |
| * <p> |
| * You must dispose the image when it is no longer required. |
| * </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> |
| * |
| * @see #dispose() |
| */ |
| 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); |
| } |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| source = DPIUtil.autoScaleUp (device, source); |
| mask = DPIUtil.autoScaleUp (device, mask); |
| 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> |
| * <p> |
| * You must dispose the image when it is no longer required. |
| * </p> |
| * |
| * @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> |
| * |
| * @see #dispose() |
| */ |
| public Image(Device device, InputStream stream) { |
| super(device); |
| ImageData data = new ImageData(stream); |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| data = DPIUtil.autoScaleUp (device, data); |
| init(data); |
| 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. |
| * <p> |
| * You must dispose the image when it is no longer required. |
| * </p> |
| * |
| * @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> |
| * |
| * @see #dispose() |
| */ |
| public Image(Device device, String filename) { |
| super(device); |
| if (filename == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| |
| ImageData data = new ImageData(filename); |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| data = DPIUtil.autoScaleUp (device, data); |
| init(data); |
| init(); |
| } |
| |
| /** |
| * Constructs an instance of this class by loading its representation |
| * from the file retrieved from the ImageFileNameProvider. 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 for loading image as |
| * per DPI level. |
| * |
| * @param device the device on which to create the image |
| * @param imageFileNameProvider the ImageFileNameProvider object that is |
| * to be used to get the file name |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> |
| * <li>ERROR_NULL_ARGUMENT - if the ImageFileNameProvider is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the fileName provided by ImageFileNameProvider is null at 100% zoom</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> |
| * @since 3.104 |
| */ |
| public Image(Device device, ImageFileNameProvider imageFileNameProvider) { |
| super(device); |
| this.imageFileNameProvider = imageFileNameProvider; |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| boolean[] found = new boolean[1]; |
| String filename = DPIUtil.validateAndGetImagePathAtZoom (imageFileNameProvider, currentDeviceZoom, found); |
| if (found[0]) { |
| initNative (filename); |
| if (this.pixmap == 0 && this.surface == 0) { |
| ImageData data = new ImageData(filename); |
| init(data); |
| } |
| } else { |
| ImageData imageData = new ImageData (filename); |
| ImageData resizedData = DPIUtil.autoScaleUp (device, imageData); |
| init(resizedData); |
| } |
| init (); |
| } |
| |
| /** |
| * Constructs an instance of this class by loading its representation |
| * from the ImageData retrieved from the ImageDataProvider. 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 for loading image as |
| * per DPI level. |
| * |
| * @param device the device on which to create the image |
| * @param imageDataProvider the ImageDataProvider object that is |
| * to be used to get the ImageData |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> |
| * <li>ERROR_NULL_ARGUMENT - if the ImageDataProvider is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the ImageData provided by ImageDataProvider is null at 100% zoom</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> |
| * @since 3.104 |
| */ |
| public Image(Device device, ImageDataProvider imageDataProvider) { |
| super(device); |
| this.imageDataProvider = imageDataProvider; |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| boolean[] found = new boolean[1]; |
| ImageData data = DPIUtil.validateAndGetImageDataAtZoom(imageDataProvider, currentDeviceZoom, found); |
| if (found[0]) { |
| init (data); |
| } else { |
| ImageData resizedData = DPIUtil.autoScaleUp (device, data); |
| init (resizedData); |
| } |
| init (); |
| } |
| |
| /** |
| * Refresh the Image based on the zoom level, if required. |
| * |
| * @return true if image is refreshed |
| */ |
| boolean refreshImageForZoom () { |
| boolean refreshed = false; |
| int deviceZoom = DPIUtil.getDeviceZoom(); |
| if (imageFileNameProvider != null) { |
| int deviceZoomLevel = deviceZoom; |
| if (deviceZoomLevel != currentDeviceZoom) { |
| boolean[] found = new boolean[1]; |
| String filename = DPIUtil.validateAndGetImagePathAtZoom (imageFileNameProvider, deviceZoomLevel, found); |
| /* Avoid re-creating the fall-back image, when current zoom is already 100% */ |
| if (found[0] || currentDeviceZoom != 100) { |
| /* Release current native resources */ |
| destroy (); |
| initNative(filename); |
| if (this.pixmap == 0 && this.surface == 0) { |
| ImageData data = new ImageData(filename); |
| init(data); |
| } |
| init (); |
| refreshed = true; |
| } |
| if (!found[0]) { |
| /* Release current native resources */ |
| destroy (); |
| ImageData imageData = new ImageData (filename); |
| ImageData resizedData = DPIUtil.autoScaleUp (device, imageData); |
| init(resizedData); |
| init (); |
| refreshed = true; |
| } |
| currentDeviceZoom = deviceZoomLevel; |
| } |
| } else if (imageDataProvider != null) { |
| int deviceZoomLevel = deviceZoom; |
| if (deviceZoomLevel != currentDeviceZoom) { |
| boolean[] found = new boolean[1]; |
| ImageData data = DPIUtil.validateAndGetImageDataAtZoom (imageDataProvider, deviceZoomLevel, found); |
| /* Avoid re-creating the fall-back image, when current zoom is already 100% */ |
| if (found[0] || currentDeviceZoom != 100) { |
| /* Release current native resources */ |
| destroy (); |
| init(data); |
| init(); |
| refreshed = true; |
| } |
| if (!found[0]) { |
| /* Release current native resources */ |
| destroy (); |
| ImageData resizedData = DPIUtil.autoScaleImageData(device, data, deviceZoomLevel, 100); |
| init(resizedData); |
| init(); |
| refreshed = true; |
| } |
| currentDeviceZoom = deviceZoomLevel; |
| } |
| } else { |
| int deviceZoomLevel = deviceZoom; |
| if (deviceZoomLevel != currentDeviceZoom) { |
| ImageData data = getImageDataAtCurrentZoom(); |
| destroy (); |
| ImageData resizedData = DPIUtil.autoScaleImageData(device, data, deviceZoomLevel, currentDeviceZoom); |
| init(resizedData); |
| init(); |
| refreshed = true; |
| currentDeviceZoom = deviceZoomLevel; |
| } |
| } |
| return refreshed; |
| } |
| |
| void initNative(String filename) { |
| try { |
| int length = filename.length (); |
| char [] chars = new char [length]; |
| filename.getChars (0, length, chars, 0); |
| byte [] buffer = Converter.wcsToMbcs(chars, true); |
| long /*int*/ pixbuf = GDK.gdk_pixbuf_new_from_file(buffer, null); |
| if (pixbuf != 0) { |
| try { |
| createFromPixbuf (SWT.BITMAP, pixbuf); |
| } finally { |
| if (pixbuf != 0) OS.g_object_unref (pixbuf); |
| } |
| } |
| } catch (SWTException e) {} |
| } |
| |
| void createFromPixbuf(int type, long /*int*/ pixbuf) { |
| this.type = type; |
| boolean hasAlpha = GDK.gdk_pixbuf_get_has_alpha(pixbuf); |
| int width = this.width = GDK.gdk_pixbuf_get_width(pixbuf); |
| int height = this.height = GDK.gdk_pixbuf_get_height(pixbuf); |
| int stride = GDK.gdk_pixbuf_get_rowstride(pixbuf); |
| long /*int*/ pixels = GDK.gdk_pixbuf_get_pixels(pixbuf); |
| int format = hasAlpha ? Cairo.CAIRO_FORMAT_ARGB32 : Cairo.CAIRO_FORMAT_RGB24; |
| surface = Cairo.cairo_image_surface_create(format, width, height); |
| if (surface == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| if (DPIUtil.useCairoAutoScale()) { |
| double scaleFactor = DPIUtil.getDeviceZoom() / 100f; |
| Cairo.cairo_surface_set_device_scale(surface, scaleFactor, scaleFactor); |
| } |
| long /*int*/ data = Cairo.cairo_image_surface_get_data(surface); |
| int cairoStride = Cairo.cairo_image_surface_get_stride(surface); |
| int oa = 0, or = 0, og = 0, ob = 0; |
| if (OS.BIG_ENDIAN) { |
| oa = 0; or = 1; og = 2; ob = 3; |
| } else { |
| oa = 3; or = 2; og = 1; ob = 0; |
| } |
| byte[] line = new byte[stride]; |
| if (hasAlpha) { |
| alphaData = new byte[width * height]; |
| for (int y = 0, alphaOffset = 0; y < height; y++) { |
| C.memmove(line, pixels + (y * stride), stride); |
| for (int x = 0, offset = 0; x < width; x++, offset += 4) { |
| int a = line[offset + 3] & 0xFF; |
| int r = ((line[offset + 0] & 0xFF) * a) + 128; |
| r = (r + (r >> 8)) >> 8; |
| int g = ((line[offset + 1] & 0xFF) * a) + 128; |
| g = (g + (g >> 8)) >> 8; |
| int b = ((line[offset + 2] & 0xFF) * a) + 128; |
| b = (b + (b >> 8)) >> 8; |
| line[offset + oa] = (byte)a; |
| line[offset + or] = (byte)r; |
| line[offset + og] = (byte)g; |
| line[offset + ob] = (byte)b; |
| alphaData[alphaOffset++] = (byte)a; |
| } |
| C.memmove(data + (y * stride), line, stride); |
| } |
| } else { |
| byte[] cairoLine = new byte[cairoStride]; |
| for (int y = 0; y < height; y++) { |
| C.memmove(line, pixels + (y * stride), stride); |
| for (int x = 0, offset = 0, cairoOffset = 0; x < width; x++, offset += 3, cairoOffset += 4) { |
| int r = line[offset + 0] & 0xFF; |
| int g = line[offset + 1] & 0xFF; |
| int b = line[offset + 2] & 0xFF; |
| cairoLine[cairoOffset + or] = (byte)r; |
| cairoLine[cairoOffset + og] = (byte)g; |
| cairoLine[cairoOffset + ob] = (byte)b; |
| } |
| C.memmove(data + (y * cairoStride), cairoLine, cairoStride); |
| } |
| } |
| Cairo.cairo_surface_mark_dirty(surface); |
| } |
| |
| /** |
| * Create the receiver's mask if necessary. |
| */ |
| void createMask() { |
| int width = this.width; |
| int height = this.height; |
| int stride = Cairo.cairo_image_surface_get_stride(surface); |
| long /*int*/ surfaceData = Cairo.cairo_image_surface_get_data(surface); |
| int oa, or, og, ob, tr, tg, tb; |
| if (OS.BIG_ENDIAN) { |
| oa = 0; or = 1; og = 2; ob = 3; |
| tr = (transparentPixel >> 24) & 0xFF; |
| tg = (transparentPixel >> 16) & 0xFF; |
| tb = (transparentPixel >> 8) & 0xFF; |
| } else { |
| oa = 3; or = 2; og = 1; ob = 0; |
| tr = (transparentPixel >> 16) & 0xFF; |
| tg = (transparentPixel >> 8) & 0xFF; |
| tb = (transparentPixel >> 0) & 0xFF; |
| } |
| byte[] srcData = new byte[stride * height]; |
| C.memmove(srcData, surfaceData, srcData.length); |
| int offset = 0; |
| for (int y = 0; y < height; y++) { |
| for (int x = 0; x < width; x++, offset += 4) { |
| int a = srcData[offset + oa] & 0xFF; |
| int r = srcData[offset + or] & 0xFF; |
| int g = srcData[offset + og] & 0xFF; |
| int b = srcData[offset + ob] & 0xFF; |
| if (r == tr && g == tg && b == tb) { |
| a = r = g = b = 0; |
| } else { |
| a = 0xff; |
| } |
| srcData[offset + oa] = (byte)a; |
| srcData[offset + or] = (byte)r; |
| srcData[offset + og] = (byte)g; |
| srcData[offset + ob] = (byte)b; |
| } |
| } |
| C.memmove(surfaceData, srcData, srcData.length); |
| } |
| |
| void createSurface() { |
| if (surface != 0) return; |
| } |
| |
| /** |
| * Destroy the receiver's mask if it exists. |
| */ |
| void destroyMask() { |
| if (mask == 0) return; |
| OS.g_object_unref(mask); |
| mask = 0; |
| } |
| |
| @Override |
| void destroy() { |
| if (memGC != null) memGC.dispose(); |
| if (pixmap != 0) OS.g_object_unref(pixmap); |
| if (mask != 0) OS.g_object_unref(mask); |
| if (surface != 0) Cairo.cairo_surface_destroy(surface); |
| surface = pixmap = mask = 0; |
| memGC = null; |
| } |
| |
| /** |
| * Compares the argument to the receiver, and returns true |
| * if they represent the <em>same</em> object using a class |
| * specific comparison. |
| * |
| * @param object the object to compare with this object |
| * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise |
| * |
| * @see #hashCode |
| */ |
| @Override |
| public boolean equals (Object object) { |
| if (object == this) return true; |
| if (!(object instanceof Image)) return false; |
| Image image = (Image)object; |
| if (device != image.device || transparentPixel != image.transparentPixel) return false; |
| if (imageDataProvider != null && image.imageDataProvider != null) { |
| return (styleFlag == image.styleFlag) && imageDataProvider.equals (image.imageDataProvider); |
| } else if (imageFileNameProvider != null && image.imageFileNameProvider != null) { |
| return (styleFlag == image.styleFlag) && imageFileNameProvider.equals (image.imageFileNameProvider); |
| } else { |
| return surface == image.surface; |
| } |
| } |
| |
| /** |
| * 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; |
| //NOT DONE |
| return null; |
| } |
| /** |
| * 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 in points. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon</li> |
| * </ul> |
| */ |
| public Rectangle getBounds() { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| return DPIUtil.autoScaleBounds(getBoundsInPixels(), 100, currentDeviceZoom); |
| } |
| |
| /** |
| * 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 in pixels. |
| * |
| * @return a rectangle specifying the image's bounds in pixels. |
| * |
| * @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> |
| * @since 3.105 |
| * @deprecated This API doesn't serve the purpose in an environment having |
| * multiple monitors with different DPIs, hence deprecated. |
| */ |
| @Deprecated |
| public Rectangle getBoundsInPixels() { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (width != -1 && height != -1) { |
| return new Rectangle(0, 0, width, height); |
| } |
| int[] w = new int[1]; int[] h = new int[1]; |
| GDK.gdk_pixmap_get_size(pixmap, w, h); |
| 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 at 100% zoom level. |
| * |
| * @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); |
| return getImageData(100); |
| |
| } |
| |
| /** |
| * 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 at the current zoom level. |
| * |
| * @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 |
| * @since 3.105 |
| * @deprecated This API doesn't serve the purpose in an environment having |
| * multiple monitors with different DPIs, hence deprecated. Use |
| * {@link #getImageData(int)} instead. |
| */ |
| @Deprecated |
| public ImageData getImageDataAtCurrentZoom () { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| |
| long /*int*/ surface = ImageList.convertSurface(this); |
| int format = Cairo.cairo_image_surface_get_format(surface); |
| int width = Cairo.cairo_image_surface_get_width(surface); |
| int height = Cairo.cairo_image_surface_get_height(surface); |
| int stride = Cairo.cairo_image_surface_get_stride(surface); |
| long /*int*/ surfaceData = Cairo.cairo_image_surface_get_data(surface); |
| boolean hasAlpha = format == Cairo.CAIRO_FORMAT_ARGB32; |
| int oa, or, og, ob; |
| if (OS.BIG_ENDIAN) { |
| oa = 0; or = 1; og = 2; ob = 3; |
| } else { |
| oa = 3; or = 2; og = 1; ob = 0; |
| } |
| byte[] srcData = new byte[stride * height]; |
| C.memmove(srcData, surfaceData, srcData.length); |
| PaletteData palette = new PaletteData(0xFF0000, 0xFF00, 0xFF); |
| ImageData data = new ImageData(width, height, 32, palette, 4, srcData); |
| if (hasAlpha) { |
| byte[] alphaData = data.alphaData = new byte[width * height]; |
| for (int y = 0, offset = 0, alphaOffset = 0; y < height; y++) { |
| for (int x = 0; x < width; x++, offset += 4) { |
| int a = srcData[offset + oa] & 0xFF; |
| int r = srcData[offset + or] & 0xFF; |
| int g = srcData[offset + og] & 0xFF; |
| int b = srcData[offset + ob] & 0xFF; |
| srcData[offset + 0] = 0; |
| alphaData[alphaOffset++] = (byte)a; |
| if (a != 0) { |
| srcData[offset + 1] = (byte)(((r * 0xFF) + a / 2) / a); |
| srcData[offset + 2] = (byte)(((g * 0xFF) + a / 2) / a); |
| srcData[offset + 3] = (byte)(((b * 0xFF) + a / 2) / a); |
| } |
| } |
| } |
| } else { |
| for (int y = 0, offset = 0; y < height; y++) { |
| for (int x = 0; x < width; x++, offset += 4) { |
| byte r = srcData[offset + or]; |
| byte g = srcData[offset + og]; |
| byte b = srcData[offset + ob]; |
| srcData[offset + 0] = 0; |
| srcData[offset + 1] = r; |
| srcData[offset + 2] = g; |
| srcData[offset + 3] = b; |
| } |
| } |
| } |
| Cairo.cairo_surface_destroy(surface); |
| return data; |
| } |
| |
| /** |
| * Returns an {@link ImageData} for the given zoom level based on the |
| * receiver. |
| * <p> |
| * Note that this method is mainly intended to be used by custom |
| * implementations of {@link ImageDataProvider} that draw a composite image |
| * at the requested zoom level based on other images. For custom zoom |
| * levels, the image data may be an auto-scaled version of the native image |
| * and may look more blurred or mangled than expected. |
| * </p> |
| * <p> |
| * Modifications made to the returned {@code ImageData} will not affect this |
| * {@code Image}. |
| * </p> |
| * |
| * @param zoom |
| * The zoom level in % of the standard resolution (which is 1 |
| * physical monitor pixel == 1 SWT logical pixel). Typically 100, |
| * 150, or 200. |
| * @return an <code>ImageData</code> containing the image's data and |
| * attributes at the given zoom level |
| * |
| * @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> |
| * |
| * @since 3.106 |
| */ |
| public ImageData getImageData (int zoom) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| |
| if (zoom == currentDeviceZoom) { |
| return getImageDataAtCurrentZoom(); |
| } else if (imageDataProvider != null) { |
| boolean[] found = new boolean[1]; |
| ImageData data = DPIUtil.validateAndGetImageDataAtZoom (imageDataProvider, zoom, found); |
| // exact image found |
| if (found[0]) { |
| return data; |
| } |
| // AutoScale the image at 100% zoom |
| return DPIUtil.autoScaleUp (device, data); |
| } else if (imageFileNameProvider != null) { |
| boolean[] found = new boolean[1]; |
| String fileName = DPIUtil.validateAndGetImagePathAtZoom (imageFileNameProvider, zoom, found); |
| // exact image found |
| if (found[0]) { |
| return new ImageData (fileName); |
| } |
| // AutoScale the image at 100% zoom |
| return DPIUtil.autoScaleUp (device, new ImageData (fileName)); |
| } else { |
| return DPIUtil.autoScaleImageData (device, getImageDataAtCurrentZoom (), zoom, currentDeviceZoom); |
| } |
| } |
| |
| /** |
| * Invokes platform specific functionality to allocate a new image. |
| * <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 device the device on which to allocate the color |
| * @param type the type of the image (<code>SWT.BITMAP</code> or <code>SWT.ICON</code>) |
| * @param imageHandle the OS handle for the image |
| * @param mask the OS handle for the image mask |
| * |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| public static Image gtk_new(Device device, int type, long /*int*/ imageHandle, long /*int*/ mask) { |
| Image image = new Image(device); |
| image.type = type; |
| image.surface = imageHandle; |
| image.mask = mask; |
| return image; |
| } |
| |
| /** |
| * Invokes platform specific functionality to allocate a new image. |
| * <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 device the device on which to allocate the color |
| * @param type the type of the image (<code>SWT.BITMAP</code> or <code>SWT.ICON</code>) |
| * @param pixbuf an GdkPixbuf |
| * |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| public static Image gtk_new_from_pixbuf(Device device, int type, long /*int*/ pixbuf) { |
| Image image = new Image(device); |
| image.createFromPixbuf(type, pixbuf); |
| image.type = type; |
| return image; |
| } |
| |
| /** |
| * Returns an integer hash code for the receiver. Any two |
| * objects that return <code>true</code> when passed to |
| * <code>equals</code> must return the same value for this |
| * method. |
| * |
| * @return the receiver's hash |
| * |
| * @see #equals |
| */ |
| @Override |
| public int hashCode () { |
| if (imageDataProvider != null) { |
| return imageDataProvider.hashCode(); |
| } else if (imageFileNameProvider != null) { |
| return imageFileNameProvider.hashCode(); |
| } else { |
| return (int)/*64*/surface; |
| } |
| } |
| |
| void init(int width, int height) { |
| if (width <= 0 || height <= 0) { |
| SWT.error (SWT.ERROR_INVALID_ARGUMENT); |
| } |
| this.type = SWT.BITMAP; |
| |
| /* Create the pixmap */ |
| surface = GDK.gdk_window_create_similar_surface(GDK.gdk_get_default_root_window(), Cairo.CAIRO_CONTENT_COLOR, width, height); |
| if (surface == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| // When we create a blank image we need to set it to 100 in GTK3 as we draw using 100% scale. |
| // Cairo will take care of scaling for us when image needs to be scaled. |
| if (DPIUtil.useCairoAutoScale()) { |
| currentDeviceZoom = 100; |
| Cairo.cairo_surface_set_device_scale(surface, 1f, 1f); |
| } else { |
| currentDeviceZoom = DPIUtil.getDeviceZoom(); |
| } |
| long /*int*/ cairo = Cairo.cairo_create(surface); |
| if (cairo == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| Cairo.cairo_set_source_rgb(cairo, 1, 1, 1); |
| Cairo.cairo_rectangle(cairo, 0, 0, width, height); |
| Cairo.cairo_fill(cairo); |
| Cairo.cairo_destroy(cairo); |
| this.width = width; |
| this.height = height; |
| } |
| |
| void init(ImageData image) { |
| if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| int width = this.width = image.width; |
| int height = this.height = image.height; |
| PaletteData palette = image.palette; |
| if (!(((image.depth == 1 || image.depth == 2 || image.depth == 4 || image.depth == 8) && !palette.isDirect) || |
| ((image.depth == 8) || (image.depth == 16 || image.depth == 24 || image.depth == 32) && palette.isDirect))) |
| SWT.error (SWT.ERROR_UNSUPPORTED_DEPTH); |
| boolean hasAlpha = image.transparentPixel != -1 || image.alpha != -1 || image.maskData != null || image.alphaData != null; |
| int format = hasAlpha ? Cairo.CAIRO_FORMAT_ARGB32 : Cairo.CAIRO_FORMAT_RGB24; |
| surface = Cairo.cairo_image_surface_create(format, width, height); |
| if (surface == 0) SWT.error(SWT.ERROR_NO_HANDLES); |
| if (DPIUtil.useCairoAutoScale()) { |
| double scaleFactor = DPIUtil.getDeviceZoom() / 100f; |
| Cairo.cairo_surface_set_device_scale(surface, scaleFactor, scaleFactor); |
| } |
| int stride = Cairo.cairo_image_surface_get_stride(surface); |
| long /*int*/ data = Cairo.cairo_image_surface_get_data(surface); |
| int oa = 0, or = 0, og = 0, ob = 0; |
| int redMask, greenMask, blueMask, destDepth = 32, destOrder; |
| if (OS.BIG_ENDIAN) { |
| oa = 0; or = 1; og = 2; ob = 3; |
| redMask = 0xFF00; |
| greenMask = 0xFF0000; |
| blueMask = 0xFF000000; |
| destOrder = ImageData.MSB_FIRST; |
| } else { |
| oa = 3; or = 2; og = 1; ob = 0; |
| redMask = 0xFF0000; |
| greenMask = 0xFF00; |
| blueMask = 0xFF; |
| destOrder = ImageData.LSB_FIRST; |
| } |
| byte[] buffer = image.data; |
| if (!palette.isDirect || image.depth != destDepth || stride != image.bytesPerLine || palette.redMask != redMask || palette.greenMask != greenMask || palette.blueMask != blueMask || destOrder != image.getByteOrder()) { |
| buffer = new byte[stride * height]; |
| if (palette.isDirect) { |
| ImageData.blit(ImageData.BLIT_SRC, |
| image.data, image.depth, image.bytesPerLine, image.getByteOrder(), 0, 0, width, height, palette.redMask, palette.greenMask, palette.blueMask, |
| ImageData.ALPHA_OPAQUE, null, 0, 0, 0, |
| buffer, destDepth, stride, destOrder, 0, 0, width, height, redMask, greenMask, blueMask, |
| false, false); |
| } else { |
| RGB[] rgbs = palette.getRGBs(); |
| int length = rgbs.length; |
| byte[] srcReds = new byte[length]; |
| byte[] srcGreens = new byte[length]; |
| byte[] 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; |
| } |
| ImageData.blit(ImageData.BLIT_SRC, |
| image.data, image.depth, image.bytesPerLine, image.getByteOrder(), 0, 0, width, height, srcReds, srcGreens, srcBlues, |
| ImageData.ALPHA_OPAQUE, null, 0, 0, 0, |
| buffer, destDepth, stride, destOrder, 0, 0, width, height, redMask, greenMask, blueMask, |
| false, false); |
| } |
| } |
| boolean isIcon = image.getTransparencyType() == SWT.TRANSPARENCY_MASK; |
| this.type = isIcon ? SWT.ICON : SWT.BITMAP; |
| if (isIcon || image.transparentPixel != -1) { |
| if (image.transparentPixel != -1) { |
| RGB rgb = null; |
| if (palette.isDirect) { |
| rgb = palette.getRGB(image.transparentPixel); |
| } else { |
| if (image.transparentPixel < palette.colors.length) { |
| rgb = palette.getRGB(image.transparentPixel); |
| } |
| } |
| if (rgb != null) { |
| transparentPixel = rgb.red << 16 | rgb.green << 8 | rgb.blue; |
| } |
| } |
| ImageData mask = image.getTransparencyMask(); |
| for (int y = 0, offset = 0; y < height; y++) { |
| for (int x=0; x<width; x++, offset += 4) { |
| int alpha = mask.getPixel(x, y) == 0 ? 0 : 0xff; |
| /* pre-multiplied alpha */ |
| int r = ((buffer[offset + or] & 0xFF) * alpha) + 128; |
| r = (r + (r >> 8)) >> 8; |
| int g = ((buffer[offset + og] & 0xFF) * alpha) + 128; |
| g = (g + (g >> 8)) >> 8; |
| int b = ((buffer[offset + ob] & 0xFF) * alpha) + 128; |
| b = (b + (b >> 8)) >> 8; |
| buffer[offset + oa] = (byte)alpha; |
| buffer[offset + or] = (byte)r; |
| buffer[offset + og] = (byte)g; |
| buffer[offset + ob] = (byte)b; |
| } |
| } |
| } else { |
| 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); |
| } |
| if (this.alpha != -1) { |
| for (int y = 0, offset = 0; y < height; y++) { |
| for (int x=0; x<width; x++, offset += 4) { |
| int alpha = this.alpha; |
| /* pre-multiplied alpha */ |
| int r = ((buffer[offset + or] & 0xFF) * alpha) + 128; |
| r = (r + (r >> 8)) >> 8; |
| int g = ((buffer[offset + og] & 0xFF) * alpha) + 128; |
| g = (g + (g >> 8)) >> 8; |
| int b = ((buffer[offset + ob] & 0xFF) * alpha) + 128; |
| b = (b + (b >> 8)) >> 8; |
| buffer[offset + oa] = (byte)alpha; |
| buffer[offset + or] = (byte)r; |
| buffer[offset + og] = (byte)g; |
| buffer[offset + ob] = (byte)b; |
| } |
| } |
| } else if (this.alphaData != null) { |
| for (int y = 0, offset = 0; y < height; y++) { |
| for (int x=0; x<width; x++, offset += 4) { |
| int alpha = alphaData [y*width+x] & 0xFF; |
| /* pre-multiplied alpha */ |
| int r = ((buffer[offset + or] & 0xFF) * alpha) + 128; |
| r = (r + (r >> 8)) >> 8; |
| int g = ((buffer[offset + og] & 0xFF) * alpha) + 128; |
| g = (g + (g >> 8)) >> 8; |
| int b = ((buffer[offset + ob] & 0xFF) * alpha) + 128; |
| b = (b + (b >> 8)) >> 8; |
| buffer[offset + oa] = (byte)alpha; |
| buffer[offset + or] = (byte)r; |
| buffer[offset + og] = (byte)g; |
| buffer[offset + ob] = (byte)b; |
| } |
| } |
| } |
| } |
| C.memmove(data, buffer, stride * height); |
| Cairo.cairo_surface_mark_dirty(surface); |
| } |
| |
| /** |
| * 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. |
| */ |
| @Override |
| public long /*int*/ internal_new_GC (GCData data) { |
| if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); |
| if (type != SWT.BITMAP || memGC != null) { |
| SWT.error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| long /*int*/ gc = Cairo.cairo_create(surface); |
| if (data != null) { |
| int mask = SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT; |
| if ((data.style & mask) == 0) { |
| data.style |= SWT.LEFT_TO_RIGHT; |
| } else { |
| if ((data.style & SWT.RIGHT_TO_LEFT) != 0) { |
| data.style |= SWT.MIRRORED; |
| } |
| } |
| data.device = device; |
| data.drawable = pixmap; |
| data.foregroundRGBA = device.COLOR_BLACK.handle; |
| data.backgroundRGBA = device.COLOR_WHITE.handle; |
| data.font = device.systemFont; |
| data.image = this; |
| } |
| return gc; |
| } |
| |
| /** |
| * 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. |
| */ |
| @Override |
| public void internal_dispose_GC (long /*int*/ hDC, GCData data) { |
| Cairo.cairo_destroy(hDC); |
| } |
| |
| /** |
| * 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 |
| */ |
| @Override |
| public boolean isDisposed() { |
| return surface == 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; |
| //NOT DONE |
| } |
| |
| /** |
| * Returns a string containing a concise, human-readable |
| * description of the receiver. |
| * |
| * @return a string representation of the receiver |
| */ |
| @Override |
| public String toString () { |
| if (isDisposed()) return "Image {*DISPOSED*}"; |
| return "Image {" + surface + "}"; |
| } |
| |
| } |