org.eclipse.swt.graphics.Image Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2022 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 java.util.*;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.DPIUtil.*;
import org.eclipse.swt.internal.gdip.*;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.widgets.*;
/**
* 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 GC.drawImage()
* and display on widgets with, for example, Button.setImage().
*
* If loaded from a file format that supports it, an
* Image 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.
*
* There are two primary ways to use Images.
* The first is to load a graphic file from disk and create an
* Image from it. This is done using an Image
* constructor, for example:
*
* Image i = new Image(device, "C:\\graphic.bmp");
*
* 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:
*
* 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);
*
*
* Applications which require even greater control over the image
* loading process should use the support provided in class
* ImageLoader.
*
* Application code must explicitly invoke the Image.dispose()
* method to release the operating system resources managed by each instance
* when those instances are no longer required.
*
*
* @see Color
* @see ImageData
* @see ImageLoader
* @see Image snippets
* @see SWT Examples: GraphicsExample, ImageAnalyzer
* @see Sample code and further information
*/
public final class Image extends Resource implements Drawable {
/**
* specifies whether the receiver is a bitmap or an icon
* (one of SWT.BITMAP, SWT.ICON)
*
* IMPORTANT: This field is not 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.
*
*
* @noreference This field is not intended to be referenced by clients.
*/
public int type;
/**
* the handle to the OS image resource
* (Warning: This field is platform dependent)
*
* IMPORTANT: This field is not 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.
*
*
* @noreference This field is not intended to be referenced by clients.
*/
public long handle;
/**
* specifies the transparent pixel
*/
int transparentPixel = -1, transparentColor = -1;
/**
* the GC which is drawing on the image
*/
GC memGC;
/**
* Base image data at given zoom in % of the standard resolution. It will be used for
* scaled variants of this image
*/
private ElementAtZoom dataAtBaseZoom;
/**
* 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 native zoom level
*/
private int initialNativeZoom = 100;
/**
* width of the image
*/
int width = -1;
/**
* height of the image
*/
int height = -1;
/**
* specifies the default scanline padding
*/
static final int DEFAULT_SCANLINE_PAD = 4;
private HashMap zoomLevelToHandle = new HashMap<>();
/**
* Prevents uninitialized instances from being created outside the package.
*/
Image (Device device) {
super(device);
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
this.device.registerResourceWithZoomSupport(this);
}
/**
* 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:
*
* Image i = new Image(device, width, height);
* GC gc = new GC(i);
* gc.drawRectangle(0, 0, 50, 50);
* gc.dispose();
*
*
* 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.
*
*
* You must dispose the image when it is no longer required.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_INVALID_ARGUMENT - if either the width or height is negative or zero
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
*
* @see #dispose()
*/
public Image(Device device, int width, int height) {
super(device);
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
final int zoom = getZoom();
width = DPIUtil.scaleUp (width, zoom);
height = DPIUtil.scaleUp (height, zoom);
init(width, height);
init();
this.device.registerResourceWithZoomSupport(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:
*
* - {@link SWT#IMAGE_COPY}
* - the result is an identical copy of srcImage
* - {@link SWT#IMAGE_DISABLE}
* - the result is a copy of srcImage which has a disabled look
* - {@link SWT#IMAGE_GRAY}
* - the result is a copy of srcImage which has a gray scale look
*
*
* You must dispose the image when it is no longer required.
*
*
* @param device the device on which to create the image
* @param srcImage the image to use as the source
* @param flag the style, either IMAGE_COPY, IMAGE_DISABLE or IMAGE_GRAY
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if srcImage is null
* - ERROR_INVALID_ARGUMENT - if the flag is not one of
IMAGE_COPY, IMAGE_DISABLE or IMAGE_GRAY
* - ERROR_INVALID_ARGUMENT - if the image has been disposed
*
* @exception SWTException
* - ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon, or is otherwise in an invalid state
* - ERROR_UNSUPPORTED_DEPTH - if the depth of the image is not supported
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
*
* @see #dispose()
*/
public Image(Device device, Image srcImage, int flag) {
super(device);
device = this.device;
if (srcImage == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (srcImage.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
Rectangle rect = srcImage.getBoundsInPixels();
this.type = srcImage.type;
this.imageDataProvider = srcImage.imageDataProvider;
this.imageFileNameProvider = srcImage.imageFileNameProvider;
this.styleFlag = srcImage.styleFlag | flag;
initialNativeZoom = srcImage.initialNativeZoom;
this.dataAtBaseZoom = srcImage.dataAtBaseZoom;
switch (flag) {
case SWT.IMAGE_COPY: {
switch (type) {
case SWT.BITMAP:
/* Get the HDC for the device */
long hDC = device.internal_new_GC(null);
/* Copy the bitmap */
long hdcSource = OS.CreateCompatibleDC(hDC);
long hdcDest = OS.CreateCompatibleDC(hDC);
long hOldSrc = OS.SelectObject(hdcSource, srcImage.handle);
BITMAP bm = new BITMAP();
OS.GetObject(srcImage.handle, BITMAP.sizeof, bm);
setHandleForZoomLevel(OS.CreateCompatibleBitmap(hdcSource, rect.width, bm.bmBits != 0 ? -rect.height : rect.height), this.getZoom());
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
long hOldDest = OS.SelectObject(hdcDest, handle);
OS.BitBlt(hdcDest, 0, 0, rect.width, rect.height, hdcSource, 0, 0, OS.SRCCOPY);
OS.SelectObject(hdcSource, hOldSrc);
OS.SelectObject(hdcDest, hOldDest);
OS.DeleteDC(hdcSource);
OS.DeleteDC(hdcDest);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
transparentPixel = srcImage.transparentPixel;
break;
case SWT.ICON:
setHandleForZoomLevel(OS.CopyImage(srcImage.handle, OS.IMAGE_ICON, rect.width, rect.height, 0), getZoom());
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
break;
default:
SWT.error(SWT.ERROR_INVALID_IMAGE);
}
break;
}
case SWT.IMAGE_DISABLE: {
ImageData data = srcImage.getImageData(srcImage.getZoom());
ImageData newData = applyDisableImageData(data, rect.height, rect.width);
init (newData, getZoom());
break;
}
case SWT.IMAGE_GRAY: {
ImageData data = srcImage.getImageData(srcImage.getZoom());
ImageData newData = applyGrayImageData(data, rect.height, rect.width);
init (newData, getZoom());
break;
}
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
init();
this.device.registerResourceWithZoomSupport(this);
}
/**
* 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:
*
* Image i = new Image(device, boundsRectangle);
* GC gc = new GC(i);
* gc.drawRectangle(0, 0, 50, 50);
* gc.dispose();
*
*
* 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.
*
*
* You must dispose the image when it is no longer required.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if the bounds rectangle is null
* - ERROR_INVALID_ARGUMENT - if either the rectangle's width or height is negative
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
*
* @see #dispose()
*/
public Image(Device device, Rectangle bounds) {
super(device);
if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
bounds = DPIUtil.scaleUp (bounds, getZoom());
init(bounds.width, bounds.height);
init();
this.device.registerResourceWithZoomSupport(this);
}
/**
* Constructs an instance of this class from the given
* ImageData.
*
* You must dispose the image when it is no longer required.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if the image data is null
*
* @exception SWTException
* - ERROR_UNSUPPORTED_DEPTH - if the depth of the ImageData is not supported
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
*
* @see #dispose()
*/
public Image(Device device, ImageData data) {
super(device);
if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
this.dataAtBaseZoom = new ElementAtZoom<>(data, 100);
data = DPIUtil.autoScaleUp(device, this.dataAtBaseZoom);
init(data, getZoom());
init();
this.device.registerResourceWithZoomSupport(this);
}
/**
* Constructs an instance of this class, whose type is
* SWT.ICON, from the two given ImageData
* objects. The two images must be the same size. Pixel transparency
* in either image will be ignored.
*
* 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.
*
*
* You must dispose the image when it is no longer required.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if either the source or mask is null
* - ERROR_INVALID_ARGUMENT - if source and mask are different sizes
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
*
* @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);
}
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
this.dataAtBaseZoom = new ElementAtZoom<>(applyMask(source, ImageData.convertMask(mask)), 100);
source = DPIUtil.autoScaleUp(device, source);
mask = DPIUtil.autoScaleUp(device, mask);
mask = ImageData.convertMask(mask);
init(this.device, this, source, mask, getZoom());
init();
this.device.registerResourceWithZoomSupport(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.
*
* 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
* ImageLoader.load().
*
* This constructor may be used to load a resource as follows:
*
*
* 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;
* }
*
*
* You must dispose the image when it is no longer required.
*
*
* @param device the device on which to create the image
* @param stream the input stream to load the image from
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if the stream is null
*
* @exception SWTException
* - ERROR_IO - if an IO error occurs while reading from the stream
* - ERROR_INVALID_IMAGE - if the image stream contains invalid data
* - ERROR_UNSUPPORTED_DEPTH - if the image stream describes an image with an unsupported depth
* - ERROR_UNSUPPORTED_FORMAT - if the image stream contains an unrecognized format
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
*
* @see #dispose()
*/
public Image (Device device, InputStream stream) {
super(device);
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
this.dataAtBaseZoom = new ElementAtZoom<>(new ImageData (stream), 100);
ImageData data = DPIUtil.autoScaleUp(device, this.dataAtBaseZoom);
init(data, getZoom());
init();
this.device.registerResourceWithZoomSupport(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.
*
* 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.
*
* You must dispose the image when it is no longer required.
*
*
* @param device the device on which to create the image
* @param filename the name of the file to load the image from
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if the file name is null
*
* @exception SWTException
* - ERROR_IO - if an IO error occurs while reading from the file
* - ERROR_INVALID_IMAGE - if the image file contains invalid data
* - ERROR_UNSUPPORTED_DEPTH - if the image file describes an image with an unsupported depth
* - ERROR_UNSUPPORTED_FORMAT - if the image file contains an unrecognized format
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
*
* @see #dispose()
*/
public Image (Device device, String filename) {
super(device);
if (filename == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
this.dataAtBaseZoom = new ElementAtZoom<>(new ImageData (filename), 100);
ImageData data = DPIUtil.autoScaleUp(device, this.dataAtBaseZoom);
init(data, getZoom());
init();
this.device.registerResourceWithZoomSupport(this);
}
/**
* 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.
*
* 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
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if the ImageFileNameProvider is null
* - ERROR_INVALID_ARGUMENT - if the fileName provided by ImageFileNameProvider is null at 100% zoom
*
* @exception SWTException
* - ERROR_IO - if an IO error occurs while reading from the file
* - ERROR_INVALID_IMAGE - if the image file contains invalid data
* - ERROR_UNSUPPORTED_DEPTH - if the image file describes an image with an unsupported depth
* - ERROR_UNSUPPORTED_FORMAT - if the image file contains an unrecognized format
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
* @since 3.104
*/
public Image(Device device, ImageFileNameProvider imageFileNameProvider) {
super(device);
this.imageFileNameProvider = imageFileNameProvider;
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
ElementAtZoom fileName = DPIUtil.validateAndGetImagePathAtZoom (imageFileNameProvider, getZoom());
if (fileName.zoom() == getZoom()) {
long handle = initNative (fileName.element(), getZoom());
if (handle == 0) {
init(new ImageData (fileName.element()), getZoom());
} else {
setHandleForZoomLevel(handle, getZoom());
}
} else {
ImageData resizedData = DPIUtil.autoScaleImageData (device, new ImageData (fileName.element()), fileName.zoom());
init(resizedData, getZoom());
}
init();
this.device.registerResourceWithZoomSupport(this);
}
/**
* 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.
*
* 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
* - ERROR_NULL_ARGUMENT - if device is null and there is no current device
* - ERROR_NULL_ARGUMENT - if the ImageDataProvider is null
* - ERROR_INVALID_ARGUMENT - if the ImageData provided by ImageDataProvider is null at 100% zoom
*
* @exception SWTException
* - ERROR_IO - if an IO error occurs while reading from the file
* - ERROR_INVALID_IMAGE - if the image file contains invalid data
* - ERROR_UNSUPPORTED_DEPTH - if the image file describes an image with an unsupported depth
* - ERROR_UNSUPPORTED_FORMAT - if the image file contains an unrecognized format
*
* @exception SWTError
* - ERROR_NO_HANDLES if a handle could not be obtained for image creation
*
* @since 3.104
*/
public Image(Device device, ImageDataProvider imageDataProvider) {
super(device);
this.imageDataProvider = imageDataProvider;
initialNativeZoom = DPIUtil.getNativeDeviceZoom();
ElementAtZoom data = DPIUtil.validateAndGetImageDataAtZoom(imageDataProvider, getZoom());
ImageData resizedData = DPIUtil.scaleImageData(device, data.element(), getZoom(), data.zoom());
init (resizedData, getZoom());
init();
this.device.registerResourceWithZoomSupport(this);
}
private ImageData adaptImageDataIfDisabledOrGray(ImageData data) {
ImageData returnImageData = null;
switch (this.styleFlag) {
case SWT.IMAGE_DISABLE: {
ImageData newData = applyDisableImageData(data, data.height, data.width);
returnImageData = newData;
break;
}
case SWT.IMAGE_GRAY: {
ImageData newData = applyGrayImageData(data, data.height, data.width);
returnImageData = newData;
break;
}
default: {
returnImageData = data;
break;
}
}
return returnImageData;
}
private ImageData applyDisableImageData(ImageData data, int height, int width) {
PaletteData palette = data.palette;
RGB[] rgbs = new RGB[3];
rgbs[0] = this.device.getSystemColor(SWT.COLOR_BLACK).getRGB();
rgbs[1] = this.device.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW).getRGB();
rgbs[2] = this.device.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND).getRGB();
ImageData newData = new ImageData(width, height, 8, new PaletteData(rgbs));
newData.alpha = data.alpha;
newData.alphaData = data.alphaData;
newData.maskData = data.maskData;
newData.maskPad = data.maskPad;
if (data.transparentPixel != -1) newData.transparentPixel = 0;
/* Convert the pixels. */
int[] scanline = new int[width];
int[] maskScanline = null;
ImageData mask = null;
if (data.maskData != null) mask = data.getTransparencyMask();
if (mask != null) maskScanline = new int[width];
int redMask = palette.redMask;
int greenMask = palette.greenMask;
int blueMask = palette.blueMask;
int redShift = palette.redShift;
int greenShift = palette.greenShift;
int blueShift = palette.blueShift;
for (int y=0; y>> -redShift : red << redShift;
green = pixel & greenMask;
green = (greenShift < 0) ? green >>> -greenShift : green << greenShift;
blue = pixel & blueMask;
blue = (blueShift < 0) ? blue >>> -blueShift : blue << blueShift;
} else {
red = palette.colors[pixel].red;
green = palette.colors[pixel].green;
blue = palette.colors[pixel].blue;
}
int intensity = red * red + green * green + blue * blue;
if (intensity < 98304) {
newData.data[offset] = (byte)1;
} else {
newData.data[offset] = (byte)2;
}
}
offset++;
}
}
return newData;
}
private ImageData applyGrayImageData(ImageData data, int pHeight, int pWidth) {
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> 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>> -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++;
}
}
}
return newData;
}
/**
* IMPORTANT: This method is not part of the public
* API for Image. 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.
*
* Updates zoom and refresh the Image based on the native zoom level, if required.
*
* @param image the image to get the handle of
* @param zoom device zoom in % of the monitor on which the image is painted
*
* @return true if image is refreshed
*
* @noreference This method is not intended to be referenced by clients.
*/
public static Long win32_getHandle (Image image, int zoom) {
if(image.isDisposed()) {
return image.handle;
}
if(image.zoomLevelToHandle.get(zoom) != null) {
return image.zoomLevelToHandle.get(zoom);
}
if (image.imageFileNameProvider != null) {
ElementAtZoom imageCandidate = DPIUtil.validateAndGetImagePathAtZoom (image.imageFileNameProvider, zoom);
ImageData imageData = new ImageData (imageCandidate.element());
if (imageCandidate.zoom() == zoom) {
/* Release current native resources */
long handle = image.initNative(imageCandidate.element(), zoom);
if (handle == 0) image.init(imageData, zoom);
image.init();
} else {
ImageData resizedData = DPIUtil.scaleImageData(image.device, imageData, zoom, imageCandidate.zoom());
ImageData newData = image.adaptImageDataIfDisabledOrGray(resizedData);
image.init(newData, zoom);
}
} else if (image.imageDataProvider != null) {
ElementAtZoom imageCandidate;
try (StaticZoomUpdater unused = image.new StaticZoomUpdater(zoom)) {
imageCandidate = DPIUtil.validateAndGetImageDataAtZoom (image.imageDataProvider, zoom);
}
ImageData resizedData = DPIUtil.scaleImageData (image.device, imageCandidate.element(), zoom, imageCandidate.zoom());
ImageData newData = image.adaptImageDataIfDisabledOrGray(resizedData);
image.init(newData, zoom);
image.init();
} else {
if (image.dataAtBaseZoom == null && image.memGC == null) {
// Cache data at base zoom before refresh.
image.dataAtBaseZoom = new ElementAtZoom<>(image.getImageData(image.getZoom()), image.getZoom());
}
if (image.dataAtBaseZoom != null) {
ImageData resizedData = image.getImageData(zoom);
ImageData newData = image.adaptImageDataIfDisabledOrGray(resizedData);
image.init(newData, zoom);
image.init();
}
}
return image.zoomLevelToHandle.get(zoom);
}
long initNative(String filename, int zoom) {
long handle = 0;
device.checkGDIP();
boolean gdip = true;
/*
* Bug in GDI+. For some reason, Bitmap.LockBits() segment faults
* when loading GIF files in 64-bit Windows. The fix is to not use
* GDI+ image loading in this case.
*/
if (gdip && C.PTR_SIZEOF == 8 && filename.toLowerCase().endsWith(".gif")) gdip = false;
/*
* Bug in GDI+. Bitmap.LockBits() fails to load GIF files in
* Windows 7 when the image has a position offset in the first frame.
* The fix is to not use GDI+ image loading in this case.
*/
if (filename.toLowerCase().endsWith(".gif")) gdip = false;
if (gdip) {
int length = filename.length();
char[] chars = new char[length+1];
filename.getChars(0, length, chars, 0);
long bitmap = Gdip.Bitmap_new(chars, false);
if (bitmap != 0) {
int error = SWT.ERROR_NO_HANDLES;
int status = Gdip.Image_GetLastStatus(bitmap);
if (status == 0) {
if (filename.toLowerCase().endsWith(".ico")) {
this.type = SWT.ICON;
long[] hicon = new long[1];
status = Gdip.Bitmap_GetHICON(bitmap, hicon);
handle = hicon[0];
} else {
this.type = SWT.BITMAP;
int width = Gdip.Image_GetWidth(bitmap);
int height = Gdip.Image_GetHeight(bitmap);
int pixelFormat = Gdip.Image_GetPixelFormat(bitmap);
switch (pixelFormat) {
case Gdip.PixelFormat16bppRGB555:
case Gdip.PixelFormat16bppRGB565:
handle = createDIB(width, height, 16);
break;
case Gdip.PixelFormat24bppRGB:
case Gdip.PixelFormat32bppCMYK:
handle = createDIB(width, height, 24);
break;
case Gdip.PixelFormat32bppRGB:
// These will lose either precision or transparency
case Gdip.PixelFormat16bppGrayScale:
case Gdip.PixelFormat48bppRGB:
case Gdip.PixelFormat32bppPARGB:
case Gdip.PixelFormat64bppARGB:
case Gdip.PixelFormat64bppPARGB:
handle = createDIB(width, height, 32);
break;
}
if (handle != 0) {
/*
* This performs better than getting the bits with Bitmap.LockBits(),
* but it cannot be used when there is transparency.
*/
long hDC = device.internal_new_GC(null);
long srcHDC = OS.CreateCompatibleDC(hDC);
long oldSrcBitmap = OS.SelectObject(srcHDC, handle);
long graphics = Gdip.Graphics_new(srcHDC);
if (graphics != 0) {
Rect rect = new Rect();
rect.Width = width;
rect.Height = height;
status = Gdip.Graphics_DrawImage(graphics, bitmap, rect, 0, 0, width, height, Gdip.UnitPixel, 0, 0, 0);
if (status != 0) {
error = SWT.ERROR_INVALID_IMAGE;
OS.DeleteObject(handle);
handle = 0;
}
Gdip.Graphics_delete(graphics);
}
OS.SelectObject(srcHDC, oldSrcBitmap);
OS.DeleteDC(srcHDC);
device.internal_dispose_GC(hDC, null);
zoomLevelToHandle.put(zoom, handle);
} else {
long lockedBitmapData = Gdip.BitmapData_new();
if (lockedBitmapData != 0) {
status = Gdip.Bitmap_LockBits(bitmap, 0, 0, pixelFormat, lockedBitmapData);
if (status == 0) {
BitmapData bitmapData = new BitmapData();
Gdip.MoveMemory(bitmapData, lockedBitmapData);
int stride = bitmapData.Stride;
long pixels = bitmapData.Scan0;
int depth = 0, scanlinePad = 4, transparentPixel = -1;
switch (bitmapData.PixelFormat) {
case Gdip.PixelFormat1bppIndexed: depth = 1; break;
case Gdip.PixelFormat4bppIndexed: depth = 4; break;
case Gdip.PixelFormat8bppIndexed: depth = 8; break;
case Gdip.PixelFormat16bppARGB1555:
case Gdip.PixelFormat16bppRGB555:
case Gdip.PixelFormat16bppRGB565: depth = 16; break;
case Gdip.PixelFormat24bppRGB: depth = 24; break;
case Gdip.PixelFormat32bppRGB:
case Gdip.PixelFormat32bppARGB: depth = 32; break;
}
if (depth != 0) {
PaletteData paletteData = null;
switch (bitmapData.PixelFormat) {
case Gdip.PixelFormat1bppIndexed:
case Gdip.PixelFormat4bppIndexed:
case Gdip.PixelFormat8bppIndexed:
int paletteSize = Gdip.Image_GetPaletteSize(bitmap);
long hHeap = OS.GetProcessHeap();
long palette = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, paletteSize);
if (palette == 0) SWT.error(SWT.ERROR_NO_HANDLES);
Gdip.Image_GetPalette(bitmap, palette, paletteSize);
ColorPalette colorPalette = new ColorPalette();
Gdip.MoveMemory(colorPalette, palette, ColorPalette.sizeof);
int[] entries = new int[colorPalette.Count];
OS.MoveMemory(entries, palette + 8, entries.length * 4);
OS.HeapFree(hHeap, 0, palette);
RGB[] rgbs = new RGB[colorPalette.Count];
paletteData = new PaletteData(rgbs);
for (int i = 0; i < entries.length; i++) {
if (((entries[i] >> 24) & 0xFF) == 0 && (colorPalette.Flags & Gdip.PaletteFlagsHasAlpha) != 0) {
transparentPixel = i;
}
rgbs[i] = new RGB(((entries[i] & 0xFF0000) >> 16), ((entries[i] & 0xFF00) >> 8), ((entries[i] & 0xFF) >> 0));
}
break;
case Gdip.PixelFormat16bppARGB1555:
case Gdip.PixelFormat16bppRGB555: paletteData = new PaletteData(0x7C00, 0x3E0, 0x1F); break;
case Gdip.PixelFormat16bppRGB565: paletteData = new PaletteData(0xF800, 0x7E0, 0x1F); break;
case Gdip.PixelFormat24bppRGB: paletteData = new PaletteData(0xFF, 0xFF00, 0xFF0000); break;
case Gdip.PixelFormat32bppRGB:
case Gdip.PixelFormat32bppARGB: paletteData = new PaletteData(0xFF00, 0xFF0000, 0xFF000000); break;
}
byte[] data = new byte[stride * height], alphaData = null;
OS.MoveMemory(data, pixels, data.length);
switch (bitmapData.PixelFormat) {
case Gdip.PixelFormat16bppARGB1555:
alphaData = new byte[width * height];
for (int i = 1, j = 0; i < data.length; i += 2, j++) {
alphaData[j] = (byte)((data[i] & 0x80) != 0 ? 255 : 0);
}
break;
case Gdip.PixelFormat32bppARGB:
alphaData = new byte[width * height];
for (int i = 3, j = 0; i < data.length; i += 4, j++) {
alphaData[j] = data[i];
}
break;
}
ImageData img = new ImageData(width, height, depth, paletteData, scanlinePad, data);
img.transparentPixel = transparentPixel;
img.alphaData = alphaData;
ImageData newData = adaptImageDataIfDisabledOrGray(img);
init(newData, zoom);
handle = zoomLevelToHandle.get(zoom);
}
Gdip.Bitmap_UnlockBits(bitmap, lockedBitmapData);
} else {
error = SWT.ERROR_INVALID_IMAGE;
}
Gdip.BitmapData_delete(lockedBitmapData);
}
}
}
}
Gdip.Bitmap_delete(bitmap);
if (status == 0) {
if (handle == 0) SWT.error(error);
}
}
}
return handle;
}
long [] createGdipImage() {
return createGdipImage(this.getZoom());
}
long [] createGdipImage(Integer zoom) {
long handle = Image.win32_getHandle(this, zoom);
switch (type) {
case SWT.BITMAP: {
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
int depth = bm.bmPlanes * bm.bmBitsPixel;
boolean isDib = bm.bmBits != 0;
boolean hasAlpha = isDib && depth == 32;
if (hasAlpha || transparentPixel != -1) {
int imgWidth = bm.bmWidth;
int imgHeight = bm.bmHeight;
long srcHdc;
long memHdc;
{
long hDC = device.internal_new_GC(null);
if (hDC == 0) SWT.error(SWT.ERROR_NO_HANDLES);
srcHdc = OS.CreateCompatibleDC(hDC);
memHdc = OS.CreateCompatibleDC(hDC);
device.internal_dispose_GC(hDC, null);
}
if (srcHdc == 0) SWT.error(SWT.ERROR_NO_HANDLES);
if (memHdc == 0) SWT.error(SWT.ERROR_NO_HANDLES);
long oldSrcBitmap = OS.SelectObject(srcHdc, handle);
long memDib = createDIB(imgWidth, imgHeight, 32);
if (memDib == 0) SWT.error(SWT.ERROR_NO_HANDLES);
long oldMemBitmap = OS.SelectObject(memHdc, memDib);
BITMAP dibBM = new BITMAP();
OS.GetObject(memDib, BITMAP.sizeof, dibBM);
int sizeInBytes = dibBM.bmWidthBytes * dibBM.bmHeight;
OS.BitBlt(memHdc, 0, 0, imgWidth, imgHeight, srcHdc, 0, 0, OS.SRCCOPY);
long hHeap = OS.GetProcessHeap();
long pixels = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, sizeInBytes);
if (pixels == 0) SWT.error(SWT.ERROR_NO_HANDLES);
byte red = 0, green = 0, blue = 0;
if (hasAlpha) {
OS.MoveMemory(pixels, bm.bmBits, sizeInBytes);
}
else {
if (bm.bmBitsPixel <= 8) {
byte[] color = new byte[4];
OS.GetDIBColorTable(srcHdc, transparentPixel, 1, color);
blue = color[0];
green = color[1];
red = color[2];
} else {
switch (bm.bmBitsPixel) {
case 16:
int blueMask = 0x1F;
int blueShift = ImageData.getChannelShift(blueMask);
byte[] blues = ImageData.ANY_TO_EIGHT[ImageData.getChannelWidth(blueMask, blueShift)];
blue = blues[(transparentPixel & blueMask) >> blueShift];
int greenMask = 0x3E0;
int greenShift = ImageData.getChannelShift(greenMask);
byte[] greens = ImageData.ANY_TO_EIGHT[ImageData.getChannelWidth(greenMask, greenShift)];
green = greens[(transparentPixel & greenMask) >> greenShift];
int redMask = 0x7C00;
int redShift = ImageData.getChannelShift(redMask);
byte[] reds = ImageData.ANY_TO_EIGHT[ImageData.getChannelWidth(redMask, redShift)];
red = reds[(transparentPixel & redMask) >> redShift];
break;
case 24:
blue = (byte)((transparentPixel & 0xFF0000) >> 16);
green = (byte)((transparentPixel & 0xFF00) >> 8);
red = (byte)(transparentPixel & 0xFF);
break;
case 32:
blue = (byte)((transparentPixel & 0xFF000000) >>> 24);
green = (byte)((transparentPixel & 0xFF0000) >> 16);
red = (byte)((transparentPixel & 0xFF00) >> 8);
break;
}
}
byte[] srcData = new byte[sizeInBytes];
OS.MoveMemory(srcData, dibBM.bmBits, sizeInBytes);
for (int y = 0, dp = 0; y < imgHeight; ++y) {
for (int x = 0; x < imgWidth; ++x) {
if (srcData[dp] == blue && srcData[dp + 1] == green && srcData[dp + 2] == red) {
srcData[dp + 3] = (byte)0;
} else {
srcData[dp + 3] = (byte)0xFF;
}
dp += 4;
}
}
OS.MoveMemory(pixels, srcData, sizeInBytes);
}
OS.SelectObject(srcHdc, oldSrcBitmap);
OS.SelectObject(memHdc, oldMemBitmap);
OS.DeleteObject(srcHdc);
OS.DeleteObject(memHdc);
OS.DeleteObject(memDib);
int pixelFormat = hasAlpha ? Gdip.PixelFormat32bppPARGB : Gdip.PixelFormat32bppARGB;
return new long []{Gdip.Bitmap_new(imgWidth, imgHeight, dibBM.bmWidthBytes, pixelFormat, pixels), pixels};
}
return new long []{Gdip.Bitmap_new(handle, 0), 0};
}
case SWT.ICON: {
/*
* Bug in GDI+. Creating a new GDI+ Bitmap from a HICON segment faults
* when the icon width is bigger than the icon height. The fix is to
* detect this and create a PixelFormat32bppARGB image instead.
*/
ICONINFO iconInfo = new ICONINFO();
OS.GetIconInfo(handle, iconInfo);
long hBitmap = iconInfo.hbmColor;
if (hBitmap == 0) hBitmap = iconInfo.hbmMask;
BITMAP bm = new BITMAP();
OS.GetObject(hBitmap, BITMAP.sizeof, bm);
int imgWidth = bm.bmWidth;
int imgHeight = hBitmap == iconInfo.hbmMask ? bm.bmHeight / 2 : bm.bmHeight;
long img = 0, pixels = 0;
/*
* Bug in GDI+. Bitmap_new() segments fault if the image width
* is greater than the image height.
*
* Note that it also fails to generated an appropriate alpha
* channel when the icon depth is 32.
*/
if (imgWidth > imgHeight || bm.bmBitsPixel == 32) {
long hDC = device.internal_new_GC(null);
long srcHdc = OS.CreateCompatibleDC(hDC);
long oldSrcBitmap = OS.SelectObject(srcHdc, hBitmap);
long memHdc = OS.CreateCompatibleDC(hDC);
long memDib = createDIB(imgWidth, imgHeight, 32);
if (memDib == 0) SWT.error(SWT.ERROR_NO_HANDLES);
long oldMemBitmap = OS.SelectObject(memHdc, memDib);
BITMAP dibBM = new BITMAP();
OS.GetObject(memDib, BITMAP.sizeof, dibBM);
OS.BitBlt(memHdc, 0, 0, imgWidth, imgHeight, srcHdc, 0, hBitmap == iconInfo.hbmMask ? imgHeight : 0, OS.SRCCOPY);
OS.SelectObject(memHdc, oldMemBitmap);
OS.DeleteObject(memHdc);
byte[] srcData = new byte[dibBM.bmWidthBytes * dibBM.bmHeight];
OS.MoveMemory(srcData, dibBM.bmBits, srcData.length);
OS.DeleteObject(memDib);
OS.SelectObject(srcHdc, iconInfo.hbmMask);
for (int y = 0, dp = 3; y < imgHeight; ++y) {
for (int x = 0; x < imgWidth; ++x) {
if (srcData[dp] == 0) {
if (OS.GetPixel(srcHdc, x, y) != 0) {
srcData[dp] = (byte)0;
} else {
srcData[dp] = (byte)0xFF;
}
}
dp += 4;
}
}
OS.SelectObject(srcHdc, oldSrcBitmap);
OS.DeleteObject(srcHdc);
device.internal_dispose_GC(hDC, null);
long hHeap = OS.GetProcessHeap();
pixels = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, srcData.length);
if (pixels == 0) SWT.error(SWT.ERROR_NO_HANDLES);
OS.MoveMemory(pixels, srcData, srcData.length);
img = Gdip.Bitmap_new(imgWidth, imgHeight, dibBM.bmWidthBytes, Gdip.PixelFormat32bppARGB, pixels);
} else {
img = Gdip.Bitmap_new(handle);
}
if (iconInfo.hbmColor != 0) OS.DeleteObject(iconInfo.hbmColor);
if (iconInfo.hbmMask != 0) OS.DeleteObject(iconInfo.hbmMask);
return new long []{img, pixels};
}
default: SWT.error(SWT.ERROR_INVALID_IMAGE);
}
return null;
}
@Override
void destroy () {
device.deregisterResourceWithZoomSupport(this);
if (memGC != null) memGC.dispose();
destroyHandle();
memGC = null;
}
static int count = 0;
private void destroyHandle () {
for (Long handle : zoomLevelToHandle.values()) {
destroyHandle(handle);
}
zoomLevelToHandle.clear();
handle = 0;
}
@Override
void destroyHandlesExcept(Set zoomLevels) {
zoomLevelToHandle.entrySet().removeIf(entry -> {
final Integer zoom = entry.getKey();
if (!zoomLevels.contains(zoom) && zoom != DPIUtil.getZoomForAutoscaleProperty(initialNativeZoom)) {
destroyHandle(entry.getValue());
return true;
}
return false;
});
}
private void destroyHandle(long handle) {
if (type == SWT.ICON) {
OS.DestroyIcon (handle);
} else {
OS.DeleteObject (handle);
}
}
/**
* Compares the argument to the receiver, and returns true
* if they represent the same object using a class
* specific comparison.
*
* @param object the object to compare with this object
* @return true if the object is the same as this object and false 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 || getZoom() != image.getZoom()) 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 handle == image.handle;
}
}
/**
* Returns the color to which to map the transparent pixel, or null if
* the receiver has no transparent pixel.
*
* 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().
*
*
* @return the background color of the image, or null if there is no transparency in the image
*
* @exception SWTException
* - ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
*
*/
public Color getBackground() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (transparentPixel == -1) return null;
/* Get the HDC for the device */
long hDC = device.internal_new_GC(null);
/* Compute the background color */
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
long hdcMem = OS.CreateCompatibleDC(hDC);
long hOldObject = OS.SelectObject(hdcMem, handle);
int red = 0, green = 0, blue = 0;
if (bm.bmBitsPixel <= 8) {
byte[] color = new byte[4];
OS.GetDIBColorTable(hdcMem, transparentPixel, 1, color);
blue = color[0] & 0xFF;
green = color[1] & 0xFF;
red = color[2] & 0xFF;
} else {
switch (bm.bmBitsPixel) {
case 16:
blue = (transparentPixel & 0x1F) << 3;
green = (transparentPixel & 0x3E0) >> 2;
red = (transparentPixel & 0x7C00) >> 7;
break;
case 24:
blue = (transparentPixel & 0xFF0000) >> 16;
green = (transparentPixel & 0xFF00) >> 8;
red = transparentPixel & 0xFF;
break;
case 32:
blue = (transparentPixel & 0xFF000000) >>> 24;
green = (transparentPixel & 0xFF0000) >> 16;
red = (transparentPixel & 0xFF00) >> 8;
break;
default:
return null;
}
}
OS.SelectObject(hdcMem, hOldObject);
OS.DeleteDC(hdcMem);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
return Color.win32_new(device, (blue << 16) | (green << 8) | red);
}
/**
* 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
* - ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* - ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon
*
*/
public Rectangle getBounds() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return getBounds (100);
}
Rectangle getBounds(int zoom) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
// Read the bounds in pixels from native layer.
Rectangle bounds = getBoundsInPixelsFromNative();
if (bounds != null && zoom != getZoom()) {
bounds = DPIUtil.scaleBounds(bounds, zoom, getZoom());
}
return bounds;
}
/**
* 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
* - ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* - ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon
*
* @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);
}
return getBoundsInPixelsFromNative();
}
private Rectangle getBoundsInPixelsFromNative() {
switch (type) {
case SWT.BITMAP:
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
return new Rectangle(0, 0, width = bm.bmWidth, height = bm.bmHeight);
case SWT.ICON:
ICONINFO info = new ICONINFO();
OS.GetIconInfo(handle, info);
long hBitmap = info.hbmColor;
if (hBitmap == 0) hBitmap = info.hbmMask;
bm = new BITMAP();
OS.GetObject(hBitmap, BITMAP.sizeof, bm);
if (hBitmap == info.hbmMask) bm.bmHeight /= 2;
if (info.hbmColor != 0) OS.DeleteObject(info.hbmColor);
if (info.hbmMask != 0) OS.DeleteObject(info.hbmMask);
return new Rectangle(0, 0, width = bm.bmWidth, height = bm.bmHeight);
default:
SWT.error(SWT.ERROR_INVALID_IMAGE);
return null;
}
}
/**
* Returns an ImageData based on the receiver.
* Modifications made to this ImageData will not
* affect the Image.
*
* @return an ImageData containing the image's data and
* attributes at 100% zoom level.
*
* @exception SWTException
* - ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* - ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon
*
*
* @see ImageData
*/
public ImageData getImageData() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return getImageData(100);
}
/**
* Returns an {@link ImageData} for the given zoom level based on the
* receiver.
*
* 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.
*
*
* Modifications made to the returned {@code ImageData} will not affect this
* {@code Image}.
*
*
* @param zoom
* The zoom level in % of the standard resolution (which is 1
* physical monitor pixel == 1 SWT logical point). Typically 100,
* 150, or 200.
* @return an ImageData containing the image's data and
* attributes at the given zoom level
*
* @exception SWTException
* - ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* - ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon
*
*
* @since 3.106
*/
public ImageData getImageData (int zoom) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
int currentZoom = getZoom();
if (zoom == currentZoom) {
return getImageDataAtCurrentZoom();
} else if (imageDataProvider != null) {
ElementAtZoom data;
try (StaticZoomUpdater unused = new StaticZoomUpdater(zoom)) {
data = DPIUtil.validateAndGetImageDataAtZoom (imageDataProvider, zoom);
}
return DPIUtil.scaleImageData (device, data.element(), zoom, data.zoom());
} else if (imageFileNameProvider != null) {
ElementAtZoom fileName = DPIUtil.validateAndGetImagePathAtZoom (imageFileNameProvider, zoom);
return DPIUtil.scaleImageData (device, new ImageData (fileName.element()), zoom, fileName.zoom());
}
// if a GC is initialized with an Image (memGC != null), the image data must not be resized, because it would
// be a destructive operation. Therefor, always the current image data must be returned
if (memGC != null) {
return getImageDataAtCurrentZoom();
}
if (this.dataAtBaseZoom == null) {
// Cache data at base zoom before resizing it.
this.dataAtBaseZoom = new ElementAtZoom<>(getImageData(currentZoom), currentZoom);
}
if (this.dataAtBaseZoom != null) {
return DPIUtil.scaleImageData(device, this.dataAtBaseZoom, zoom);
} else {
return DPIUtil.scaleImageData (device, getImageDataAtCurrentZoom (), zoom, currentZoom);
}
}
/**
* Returns an ImageData based on the receiver.
* Modifications made to this ImageData will not
* affect the Image.
*
* @return an ImageData containing the image's data
* and attributes at the current zoom level.
*
* @exception SWTException
* - ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* - ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon
*
*
* @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);
BITMAP bm;
int depth, width, height;
switch (type) {
case SWT.ICON: {
ICONINFO info = new ICONINFO();
OS.GetIconInfo(handle, info);
/* Get the basic BITMAP information */
long hBitmap = info.hbmColor;
if (hBitmap == 0) hBitmap = info.hbmMask;
bm = new BITMAP();
OS.GetObject(hBitmap, BITMAP.sizeof, bm);
depth = bm.bmPlanes * bm.bmBitsPixel;
width = bm.bmWidth;
if (hBitmap == info.hbmMask) bm.bmHeight /= 2;
height = bm.bmHeight;
int numColors = 0;
if (depth <= 8) numColors = 1 << depth;
/* Create the BITMAPINFO */
BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmiHeader.biWidth = width;
bmiHeader.biHeight = -height;
bmiHeader.biPlanes = 1;
bmiHeader.biBitCount = (short)depth;
bmiHeader.biCompression = OS.BI_RGB;
byte[] bmi = new byte[BITMAPINFOHEADER.sizeof + numColors * 4];
OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
/* Get the HDC for the device */
long hDC = device.internal_new_GC(null);
/* Create the DC and select the bitmap */
long hBitmapDC = OS.CreateCompatibleDC(hDC);
long hOldBitmap = OS.SelectObject(hBitmapDC, hBitmap);
/* Find the size of the image and allocate data */
int imageSize;
/* Call with null lpBits to get the image size */
OS.GetDIBits(hBitmapDC, hBitmap, 0, height, null, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(bmiHeader, bmi, BITMAPINFOHEADER.sizeof);
imageSize = bmiHeader.biSizeImage;
byte[] data = new byte[imageSize];
/* Get the bitmap data */
OS.GetDIBits(hBitmapDC, hBitmap, 0, height, data, bmi, OS.DIB_RGB_COLORS);
/* Calculate the palette */
PaletteData palette = null;
if (depth <= 8) {
RGB[] rgbs = new RGB[numColors];
int srcIndex = 40;
for (int i = 0; i < numColors; i++) {
rgbs[i] = new RGB(bmi[srcIndex + 2] & 0xFF, bmi[srcIndex + 1] & 0xFF, bmi[srcIndex] & 0xFF);
srcIndex += 4;
}
palette = new PaletteData(rgbs);
} else if (depth == 16) {
palette = new PaletteData(0x7C00, 0x3E0, 0x1F);
} else if (depth == 24) {
palette = new PaletteData(0xFF, 0xFF00, 0xFF0000);
} else if (depth == 32) {
palette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
} else {
SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
}
/* Do the mask */
byte [] maskData = null;
byte [] alphaData = null;
if (info.hbmColor == 0) {
/* Do the bottom half of the mask */
maskData = new byte[imageSize];
OS.GetDIBits(hBitmapDC, hBitmap, height, height, maskData, bmi, OS.DIB_RGB_COLORS);
} else {
/* Do the entire mask */
/* Create the BITMAPINFO */
bmiHeader = new BITMAPINFOHEADER();
bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmiHeader.biWidth = width;
bmiHeader.biHeight = -height;
bmiHeader.biPlanes = 1;
bmiHeader.biBitCount = 1;
bmiHeader.biCompression = OS.BI_RGB;
bmi = new byte[BITMAPINFOHEADER.sizeof + 8];
OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
/* First color black, second color white */
int offset = BITMAPINFOHEADER.sizeof;
bmi[offset + 4] = bmi[offset + 5] = bmi[offset + 6] = (byte)0xFF;
bmi[offset + 7] = 0;
OS.SelectObject(hBitmapDC, info.hbmMask);
/* Call with null lpBits to get the image size */
OS.GetDIBits(hBitmapDC, info.hbmMask, 0, height, null, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(bmiHeader, bmi, BITMAPINFOHEADER.sizeof);
imageSize = bmiHeader.biSizeImage;
maskData = new byte[imageSize];
OS.GetDIBits(hBitmapDC, info.hbmMask, 0, height, maskData, bmi, OS.DIB_RGB_COLORS);
/* Loop to invert the mask */
boolean hasMaskData = false;
for (int i = 0; i < maskData.length; i++) {
hasMaskData |= maskData[i] != 0;
maskData[i] ^= -1;
}
/* Make sure mask scanlinePad is 2 */
int maskPad;
int bpl = imageSize / height;
for (maskPad = 1; maskPad < 128; maskPad++) {
int calcBpl = (((width + 7) / 8) + (maskPad - 1)) / maskPad * maskPad;
if (calcBpl == bpl) break;
}
maskData = ImageData.convertPad(maskData, width, height, 1, maskPad, 2);
// For missing mask data, see https://github.com/eclipse-platform/eclipse.platform.swt/issues/715
if (!hasMaskData && depth == 32) {
alphaData = new byte[width * height];
boolean hasAlphaData = false;
for (int pixelIndex = 0; pixelIndex < alphaData.length; pixelIndex++) {
alphaData[pixelIndex] = data[pixelIndex * 4 + 3];
hasAlphaData |= alphaData[pixelIndex] != -1;
}
// In case there is alpha data, replace the empty mask data with proper alpha data
if (hasAlphaData) {
maskData = null;
} else {
alphaData = null;
}
}
}
/* Clean up */
OS.SelectObject(hBitmapDC, hOldBitmap);
OS.DeleteDC(hBitmapDC);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
if (info.hbmColor != 0) OS.DeleteObject(info.hbmColor);
if (info.hbmMask != 0) OS.DeleteObject(info.hbmMask);
/* Construct and return the ImageData */
ImageData imageData = new ImageData(width, height, depth, palette, 4, data);
imageData.alphaData = alphaData;
imageData.maskData = maskData;
imageData.maskPad = 2;
return imageData;
}
case SWT.BITMAP: {
/* Get the basic BITMAP information */
bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
depth = bm.bmPlanes * bm.bmBitsPixel;
width = bm.bmWidth;
height = bm.bmHeight;
/* Find out whether this is a DIB or a DDB. */
boolean isDib = (bm.bmBits != 0);
/* Get the HDC for the device */
long hDC = device.internal_new_GC(null);
DIBSECTION dib = null;
if (isDib) {
dib = new DIBSECTION();
OS.GetObject(handle, DIBSECTION.sizeof, dib);
}
/* Calculate number of colors */
int numColors = 0;
if (depth <= 8) {
if (isDib) {
numColors = dib.biClrUsed;
} else {
numColors = 1 << depth;
}
}
/* Create the BITMAPINFO */
byte[] bmi = null;
BITMAPINFOHEADER bmiHeader = null;
if (!isDib) {
bmiHeader = new BITMAPINFOHEADER();
bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmiHeader.biWidth = width;
bmiHeader.biHeight = -height;
bmiHeader.biPlanes = 1;
bmiHeader.biBitCount = (short)depth;
bmiHeader.biCompression = OS.BI_RGB;
bmi = new byte[BITMAPINFOHEADER.sizeof + numColors * 4];
OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
}
/* Create the DC and select the bitmap */
long hBitmapDC = OS.CreateCompatibleDC(hDC);
long hOldBitmap = OS.SelectObject(hBitmapDC, handle);
/* Find the size of the image and allocate data */
int imageSize;
if (isDib) {
imageSize = dib.biSizeImage;
} else {
/* Call with null lpBits to get the image size */
OS.GetDIBits(hBitmapDC, handle, 0, height, null, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(bmiHeader, bmi, BITMAPINFOHEADER.sizeof);
imageSize = bmiHeader.biSizeImage;
}
byte[] data = new byte[imageSize];
/* Get the bitmap data */
if (isDib) {
OS.MoveMemory(data, bm.bmBits, imageSize);
} else {
OS.GetDIBits(hBitmapDC, handle, 0, height, data, bmi, OS.DIB_RGB_COLORS);
}
/* Calculate the palette */
PaletteData palette = null;
if (depth <= 8) {
RGB[] rgbs = new RGB[numColors];
if (isDib) {
byte[] colors = new byte[numColors * 4];
OS.GetDIBColorTable(hBitmapDC, 0, numColors, colors);
int colorIndex = 0;
for (int i = 0; i < rgbs.length; i++) {
rgbs[i] = new RGB(colors[colorIndex + 2] & 0xFF, colors[colorIndex + 1] & 0xFF, colors[colorIndex] & 0xFF);
colorIndex += 4;
}
} else {
int srcIndex = BITMAPINFOHEADER.sizeof;
for (int i = 0; i < numColors; i++) {
rgbs[i] = new RGB(bmi[srcIndex + 2] & 0xFF, bmi[srcIndex + 1] & 0xFF, bmi[srcIndex] & 0xFF);
srcIndex += 4;
}
}
palette = new PaletteData(rgbs);
} else if (depth == 16) {
palette = new PaletteData(0x7C00, 0x3E0, 0x1F);
} else if (depth == 24) {
palette = new PaletteData(0xFF, 0xFF00, 0xFF0000);
} else if (depth == 32) {
palette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
} else {
SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
}
/* Clean up */
OS.SelectObject(hBitmapDC, hOldBitmap);
OS.DeleteDC(hBitmapDC);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
/* Construct and return the ImageData */
ImageData imageData = new ImageData(width, height, depth, palette, 4, data);
imageData.transparentPixel = this.transparentPixel;
if (depth == 32) {
byte straightData[] = new byte[imageSize];
byte alphaData[] = new byte[width * height];
boolean validAlpha = isDib;
for (int ap = 0, dp = 0; validAlpha && ap < alphaData.length; ap++, dp += 4) {
int b = data[dp ] & 0xFF;
int g = data[dp + 1] & 0xFF;
int r = data[dp + 2] & 0xFF;
int a = data[dp + 3] & 0xFF;
alphaData[ap] = (byte) a;
validAlpha = validAlpha && b <= a && g <= a && r <= a;
if (a != 0) {
straightData[dp ] = (byte) (((b * 0xFF) + a / 2) / a);
straightData[dp + 1] = (byte) (((g * 0xFF) + a / 2) / a);
straightData[dp + 2] = (byte) (((r * 0xFF) + a / 2) / a);
}
}
if (validAlpha) {
imageData.data = straightData;
imageData.alphaData = alphaData;
}
else {
for (int dp = 3; dp < imageSize; dp += 4) {
data[dp] = (byte) 0xFF;
}
}
}
return imageData;
}
default:
SWT.error(SWT.ERROR_INVALID_IMAGE);
return null;
}
}
/**
* Returns an integer hash code for the receiver. Any two
* objects that return true when passed to
* equals 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 Objects.hash(imageFileNameProvider, styleFlag, transparentPixel, getZoom());
} else {
return (int)handle;
}
}
void init(int width, int height) {
if (width <= 0 || height <= 0) {
SWT.error (SWT.ERROR_INVALID_ARGUMENT);
}
type = SWT.BITMAP;
long hDC = device.internal_new_GC(null);
setHandleForZoomLevel(OS.CreateCompatibleBitmap(hDC, width, height), getZoom());
/*
* Feature in Windows. CreateCompatibleBitmap() may fail
* for large images. The fix is to create a DIB section
* in that case.
*/
if (handle == 0) {
int bits = OS.GetDeviceCaps(hDC, OS.BITSPIXEL);
int planes = OS.GetDeviceCaps(hDC, OS.PLANES);
int depth = bits * planes;
if (depth < 16) depth = 16;
if (depth > 24) depth = 24;
setHandleForZoomLevel(createDIB(width, height, depth), getZoom());
}
if (handle != 0) {
long memDC = OS.CreateCompatibleDC(hDC);
long hOldBitmap = OS.SelectObject(memDC, handle);
OS.PatBlt(memDC, 0, 0, width, height, OS.PATCOPY);
OS.SelectObject(memDC, hOldBitmap);
OS.DeleteDC(memDC);
}
device.internal_dispose_GC(hDC, null);
if (handle == 0) {
SWT.error(SWT.ERROR_NO_HANDLES, null, device.getLastError());
}
}
static long createDIB(int width, int height, int depth) {
BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmiHeader.biWidth = width;
bmiHeader.biHeight = -height;
bmiHeader.biPlanes = 1;
bmiHeader.biBitCount = (short)depth;
bmiHeader.biCompression = OS.BI_RGB;
byte[] bmi = new byte[BITMAPINFOHEADER.sizeof];
OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
long[] pBits = new long[1];
return OS.CreateDIBSection(0, bmi, OS.DIB_RGB_COLORS, pBits, 0, 0);
}
static ImageData indexToIndex(ImageData src, int newDepth) {
ImageData img = new ImageData(src.width, src.height, newDepth, src.palette);
ImageData.blit(
src.data, src.depth, src.bytesPerLine, src.getByteOrder(), src.width, src.height,
img.data, img.depth, img.bytesPerLine, src.getByteOrder(), img.width, img.height,
false, false);
img.transparentPixel = src.transparentPixel;
img.maskPad = src.maskPad;
img.maskData = src.maskData;
img.alpha = src.alpha;
img.alphaData = src.alphaData;
return img;
}
static ImageData indexToDirect(ImageData src, int newDepth, PaletteData newPalette, int newByteOrder) {
ImageData img = new ImageData(src.width, src.height, newDepth, newPalette);
RGB[] rgbs = src.palette.getRGBs();
byte[] srcReds = new byte[rgbs.length];
byte[] srcGreens = new byte[rgbs.length];
byte[] srcBlues = new byte[rgbs.length];
for (int j = 0; j < rgbs.length; j++) {
RGB rgb = rgbs[j];
if (rgb == null) continue;
srcReds[j] = (byte)rgb.red;
srcGreens[j] = (byte)rgb.green;
srcBlues[j] = (byte)rgb.blue;
}
ImageData.blit(
src.width, src.height,
src.data, src.depth, src.bytesPerLine, src.getByteOrder(), srcReds, srcGreens, srcBlues,
img.data, img.depth, img.bytesPerLine, newByteOrder, newPalette.redMask, newPalette.greenMask, newPalette.blueMask);
if (src.transparentPixel != -1) {
img.transparentPixel = newPalette.getPixel(src.palette.getRGB(src.transparentPixel));
}
img.maskPad = src.maskPad;
img.maskData = src.maskData;
img.alpha = src.alpha;
img.alphaData = src.alphaData;
return img;
}
static ImageData directToDirect(ImageData src, int newDepth, PaletteData newPalette, int newByteOrder) {
ImageData img = new ImageData(src.width, src.height, newDepth, newPalette);
ImageData.blit(
src.data, src.depth, src.bytesPerLine, src.getByteOrder(), src.width, src.height, src.palette.redMask, src.palette.greenMask, src.palette.blueMask,
img.data, img.depth, img.bytesPerLine, newByteOrder, img.width, img.height, img.palette.redMask, img.palette.greenMask, img.palette.blueMask,
false, false);
if (src.transparentPixel != -1) {
img.transparentPixel = img.palette.getPixel(src.palette.getRGB(src.transparentPixel));
}
img.maskPad = src.maskPad;
img.maskData = src.maskData;
img.alpha = src.alpha;
img.alphaData = src.alphaData;
return img;
}
static long [] init(Device device, Image image, ImageData i, Integer zoom) {
/* Windows does not support 2-bit images. Convert to 4-bit image. */
if (i.depth == 2) {
i = indexToIndex(i, 4);
}
/* Windows does not support 16-bit palette images. Convert to RGB. */
if ((i.depth == 16) && !i.palette.isDirect) {
PaletteData newPalette = new PaletteData(0xFF, 0xFF00, 0xFF0000);
i = indexToDirect(i, 24, newPalette, ImageData.MSB_FIRST);
}
boolean hasAlpha = i.alpha != -1 || i.alphaData != null;
/*
* Windows supports 16-bit mask of (0x7C00, 0x3E0, 0x1F),
* 24-bit mask of (0xFF0000, 0xFF00, 0xFF) and 32-bit mask
* (0x00FF0000, 0x0000FF00, 0x000000FF) as documented in
* MSDN BITMAPINFOHEADER. Make sure the image is
* Windows-supported.
*/
if (i.palette.isDirect) {
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;
if (hasAlpha) {
newDepth = 32;
newPalette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
}
else {
switch (i.depth) {
case 8:
/*
* Bug 566545. Usually each color mask selects a different part of the pixel
* value to encode the according color. In this common case it is rather trivial
* to convert an 8-bit direct color image to the Windows supported 16-bit image.
* However there is no enforcement for the color masks to be disjunct. For
* example an 8-bit image where all color masks select the same 8-bit of pixel
* value (mask = 0xFF and shift = 0 for all colors) results in a very efficient
* 8-bit gray-scale image without the need of defining a color table.
*
* That's why we need to calculate the actual required depth if all colors are
* stored non-overlapping which might require 24-bit instead of the usual
* expected 16-bit.
*/
int minDepth = ImageData.getChannelWidth(redMask, palette.redShift)
+ ImageData.getChannelWidth(greenMask, palette.greenShift)
+ ImageData.getChannelWidth(blueMask, palette.blueShift);
if (minDepth <= 16) {
newDepth = 16;
newOrder = ImageData.LSB_FIRST;
newPalette = new PaletteData(0x7C00, 0x3E0, 0x1F);
} else {
newDepth = 24;
newPalette = new PaletteData(0xFF, 0xFF00, 0xFF0000);
}
break;
case 16:
newOrder = ImageData.LSB_FIRST;
if (!(redMask == 0x7C00 && greenMask == 0x3E0 && blueMask == 0x1F)) {
newPalette = new PaletteData(0x7C00, 0x3E0, 0x1F);
}
break;
case 24:
if (!(redMask == 0xFF && greenMask == 0xFF00 && blueMask == 0xFF0000)) {
newPalette = new PaletteData(0xFF, 0xFF00, 0xFF0000);
}
break;
case 32:
if (i.getTransparencyType() != SWT.TRANSPARENCY_MASK) {
newDepth = 24;
newPalette = new PaletteData(0xFF, 0xFF00, 0xFF0000);
}
else if (!(redMask == 0xFF00 && greenMask == 0xFF0000 && blueMask == 0xFF000000)) {
newPalette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
}
break;
default:
SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
}
}
if (newPalette != null) {
i = directToDirect(i, newDepth, newPalette, newOrder);
}
}
else if (hasAlpha) {
PaletteData newPalette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
i = indexToDirect(i, 32, newPalette, ImageData.MSB_FIRST);
}
if (i.alpha != -1) {
int alpha = i.alpha & 0xFF;
byte[] data = i.data;
for (int dp = 0; dp < i.data.length; dp += 4) {
/* pre-multiplied alpha */
int r = ((data[dp ] & 0xFF) * alpha) + 128;
r = (r + (r >> 8)) >> 8;
int g = ((data[dp + 1] & 0xFF) * alpha) + 128;
g = (g + (g >> 8)) >> 8;
int b = ((data[dp + 2] & 0xFF) * alpha) + 128;
b = (b + (b >> 8)) >> 8;
data[dp ] = (byte) b;
data[dp + 1] = (byte) g;
data[dp + 2] = (byte) r;
data[dp + 3] = (byte) alpha;
}
}
else if (i.alphaData != null) {
byte[] data = i.data;
for (int ap = 0, dp = 0; dp < i.data.length; ap++, dp += 4) {
/* pre-multiplied alpha */
int a = i.alphaData[ap] & 0xFF;
int r = ((data[dp ] & 0xFF) * a) + 128;
r = (r + (r >> 8)) >> 8;
int g = ((data[dp + 1] & 0xFF) * a) + 128;
g = (g + (g >> 8)) >> 8;
int b = ((data[dp + 2] & 0xFF) * a) + 128;
b = (b + (b >> 8)) >> 8;
data[dp ] = (byte) r;
data[dp + 1] = (byte) g;
data[dp + 2] = (byte) b;
data[dp + 3] = (byte) a;
}
}
/* Construct bitmap info header by hand */
RGB[] rgbs = i.palette.getRGBs();
BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmiHeader.biWidth = i.width;
bmiHeader.biHeight = -i.height;
bmiHeader.biPlanes = 1;
bmiHeader.biBitCount = (short)i.depth;
bmiHeader.biCompression = OS.BI_RGB;
bmiHeader.biClrUsed = rgbs == null ? 0 : rgbs.length;
byte[] bmi;
if (i.palette.isDirect)
bmi = new byte[BITMAPINFOHEADER.sizeof];
else
bmi = new byte[BITMAPINFOHEADER.sizeof + rgbs.length * 4];
OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
/* Set the rgb colors into the bitmap info */
int offset = BITMAPINFOHEADER.sizeof;
if (!i.palette.isDirect) {
for (RGB rgb : rgbs) {
bmi[offset] = (byte)rgb.blue;
bmi[offset + 1] = (byte)rgb.green;
bmi[offset + 2] = (byte)rgb.red;
bmi[offset + 3] = 0;
offset += 4;
}
}
long[] pBits = new long[1];
long hDib = OS.CreateDIBSection(0, bmi, OS.DIB_RGB_COLORS, pBits, 0, 0);
if (hDib == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* In case of a scanline pad other than 4, do the work to convert it */
byte[] data = i.data;
if (i.scanlinePad != 4 && (i.bytesPerLine % 4 != 0)) {
data = ImageData.convertPad(data, i.width, i.height, i.depth, i.scanlinePad, 4);
}
OS.MoveMemory(pBits[0], data, data.length);
long [] result = null;
if (i.getTransparencyType() == SWT.TRANSPARENCY_MASK) {
/* Get the HDC for the device */
long hDC = device.internal_new_GC(null);
/* Create the color bitmap */
long hdcSrc = OS.CreateCompatibleDC(hDC);
OS.SelectObject(hdcSrc, hDib);
long hBitmap = OS.CreateCompatibleBitmap(hDC, i.width, i.height);
if (hBitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
long hdcDest = OS.CreateCompatibleDC(hDC);
OS.SelectObject(hdcDest, hBitmap);
OS.BitBlt(hdcDest, 0, 0, i.width, i.height, hdcSrc, 0, 0, OS.SRCCOPY);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
/* Create the mask. Windows requires icon masks to have a scanline pad of 2. */
byte[] maskData = ImageData.convertPad(i.maskData, i.width, i.height, 1, i.maskPad, 2);
long hMask = OS.CreateBitmap(i.width, i.height, 1, 1, maskData);
if (hMask == 0) SWT.error(SWT.ERROR_NO_HANDLES);
OS.SelectObject(hdcSrc, hMask);
OS.PatBlt(hdcSrc, 0, 0, i.width, i.height, OS.DSTINVERT);
OS.DeleteDC(hdcSrc);
OS.DeleteDC(hdcDest);
OS.DeleteObject(hDib);
if (image == null) {
result = new long []{hBitmap, hMask};
} else {
/* Create the icon */
ICONINFO info = new ICONINFO();
info.fIcon = true;
info.hbmColor = hBitmap;
info.hbmMask = hMask;
long hIcon = OS.CreateIconIndirect(info);
if (hIcon == 0) SWT.error(SWT.ERROR_NO_HANDLES);
OS.DeleteObject(hBitmap);
OS.DeleteObject(hMask);
image.setHandleForZoomLevel(hIcon, zoom);
image.type = SWT.ICON;
}
} else {
if (image == null) {
result = new long []{hDib};
} else {
image.setHandleForZoomLevel(hDib, zoom);
image.type = SWT.BITMAP;
image.transparentPixel = i.transparentPixel;
}
}
return result;
}
private void setHandleForZoomLevel(long handle, Integer zoom) {
if (this.handle == 0) {
this.handle = handle; // Set handle for default zoom level
}
if (zoom != null && !zoomLevelToHandle.containsKey(zoom)) {
zoomLevelToHandle.put(zoom, handle);
}
}
static long [] init(Device device, Image image, ImageData source, ImageData mask, Integer zoom) {
ImageData imageData = applyMask(source, mask);
return init(device, image, imageData, zoom);
}
private static ImageData applyMask(ImageData source, ImageData mask) {
/* Create a temporary image and locate the black pixel */
ImageData imageData;
int blackIndex = 0;
if (source.palette.isDirect) {
imageData = new ImageData(source.width, source.height, source.depth, source.palette);
} else {
RGB black = new RGB(0, 0, 0);
RGB[] rgbs = source.getRGBs();
if (source.transparentPixel != -1) {
/*
* The source had transparency, so we can use the transparent pixel
* for black.
*/
RGB[] newRGBs = new RGB[rgbs.length];
System.arraycopy(rgbs, 0, newRGBs, 0, rgbs.length);
if (source.transparentPixel >= newRGBs.length) {
/* Grow the palette with black */
rgbs = new RGB[source.transparentPixel + 1];
System.arraycopy(newRGBs, 0, rgbs, 0, newRGBs.length);
for (int i = newRGBs.length; i <= source.transparentPixel; i++) {
rgbs[i] = new RGB(0, 0, 0);
}
} else {
newRGBs[source.transparentPixel] = black;
rgbs = newRGBs;
}
blackIndex = source.transparentPixel;
imageData = new ImageData(source.width, source.height, source.depth, new PaletteData(rgbs));
} else {
while (blackIndex < rgbs.length) {
if (rgbs[blackIndex].equals(black)) break;
blackIndex++;
}
if (blackIndex == rgbs.length) {
/*
* We didn't find black in the palette, and there is no transparent
* pixel we can use.
*/
if ((1 << source.depth) > rgbs.length) {
/* We can grow the palette and add black */
RGB[] newRGBs = new RGB[rgbs.length + 1];
System.arraycopy(rgbs, 0, newRGBs, 0, rgbs.length);
newRGBs[rgbs.length] = black;
rgbs = newRGBs;
} else {
/* No room to grow the palette */
blackIndex = -1;
}
}
imageData = new ImageData(source.width, source.height, source.depth, new PaletteData(rgbs));
}
}
if (blackIndex == -1) {
/* There was no black in the palette, so just copy the data over */
System.arraycopy(source.data, 0, imageData.data, 0, imageData.data.length);
} else {
/* Modify the source image to contain black wherever the mask is 0 */
int[] imagePixels = new int[imageData.width];
int[] maskPixels = new int[mask.width];
for (int y = 0; y < imageData.height; y++) {
source.getPixels(0, y, imageData.width, imagePixels, 0);
mask.getPixels(0, y, mask.width, maskPixels, 0);
for (int i = 0; i < imagePixels.length; i++) {
if (maskPixels[i] == 0) imagePixels[i] = blackIndex;
}
imageData.setPixels(0, y, source.width, imagePixels, 0);
}
}
imageData.maskPad = mask.scanlinePad;
imageData.maskData = mask.data;
return imageData;
}
void init(ImageData i, Integer zoom) {
if (i == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(device, this, i, zoom);
}
/**
* Invokes platform specific functionality to allocate a new GC handle.
*
* IMPORTANT: This method is not part of the public
* API for Image. 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.
*
*
* @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 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);
}
/* Create a compatible HDC for the device */
long hDC = device.internal_new_GC(null);
long imageDC = OS.CreateCompatibleDC(hDC);
device.internal_dispose_GC(hDC, null);
if (imageDC == 0) SWT.error(SWT.ERROR_NO_HANDLES);
if (data != null) {
/* Set the GCData fields */
int mask = SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
if ((data.style & mask) != 0) {
data.layout = (data.style & SWT.RIGHT_TO_LEFT) != 0 ? OS.LAYOUT_RTL : 0;
} else {
data.style |= SWT.LEFT_TO_RIGHT;
}
data.device = device;
data.nativeZoom = initialNativeZoom;
data.image = this;
data.font = SWTFontProvider.getSystemFont(device, initialNativeZoom);
}
return imageDC;
}
/**
* Invokes platform specific functionality to dispose a GC handle.
*
* IMPORTANT: This method is not part of the public
* API for Image. 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.
*
*
* @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 hDC, GCData data) {
OS.DeleteDC(hDC);
}
/**
* Returns true if the image has been disposed,
* and false otherwise.
*
* 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 true when the image is disposed and false otherwise
*/
@Override
public boolean isDisposed() {
return handle == 0;
}
/**
* Sets the color to which to map the transparent pixel.
*
* 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. This method specifies the color that will be used in
* these cases. For example:
*
* Button b = new Button();
* image.setBackground(b.getBackground());
* b.setImage(image);
*
*
* 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.
*
* This method has no effect if the receiver does not have a transparent
* pixel value.
*
*
* @param color the color to use when a transparent pixel is specified
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the color is null
* - ERROR_INVALID_ARGUMENT - if the color has been disposed
*
* @exception SWTException
* - ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
*
*/
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;
transparentColor = -1;
/* Get the HDC for the device */
long hDC = device.internal_new_GC(null);
/* Change the background color in the image */
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
long hdcMem = OS.CreateCompatibleDC(hDC);
OS.SelectObject(hdcMem, handle);
int maxColors = 1 << bm.bmBitsPixel;
byte[] colors = new byte[maxColors * 4];
int numColors = OS.GetDIBColorTable(hdcMem, 0, maxColors, colors);
int offset = transparentPixel * 4;
colors[offset] = (byte)color.getBlue();
colors[offset + 1] = (byte)color.getGreen();
colors[offset + 2] = (byte)color.getRed();
OS.SetDIBColorTable(hdcMem, 0, numColors, colors);
OS.DeleteDC(hdcMem);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
}
private int getZoom() {
return DPIUtil.getZoomForAutoscaleProperty(initialNativeZoom);
}
/**
* 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 {" + handle + "}";
}
/**
* Invokes platform specific functionality to allocate a new image.
*
* IMPORTANT: This method is not part of the public
* API for Image. 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.
*
*
* @param device the device on which to allocate the color
* @param type the type of the image (SWT.BITMAP or SWT.ICON)
* @param handle the OS handle for the image
* @return a new image object containing the specified device, type and handle
*
* @noreference This method is not intended to be referenced by clients.
*/
public static Image win32_new(Device device, int type, long handle) {
Image image = new Image(device);
image.type = type;
image.setHandleForZoomLevel(handle, image.getZoom());
return image;
}
// This class is only used for a workaround and will be removed again
private class StaticZoomUpdater implements AutoCloseable {
private final boolean updateStaticZoom;
private final int currentNativeDeviceZoom;
private StaticZoomUpdater(int targetZoom) {
this.currentNativeDeviceZoom = DPIUtil.getNativeDeviceZoom();
this.updateStaticZoom = this.currentNativeDeviceZoom != targetZoom && device instanceof Display display && display.isRescalingAtRuntime();
if (updateStaticZoom) {
DPIUtil.setDeviceZoom(targetZoom);
}
}
@Override
public void close() {
if (updateStaticZoom) {
DPIUtil.setDeviceZoom(currentNativeDeviceZoom);
}
}
}
}
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