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eclipse / platform / eclipse.platform.swt / refs/tags/v3201a / . / bundles / org.eclipse.swt / Eclipse SWT / win32 / org / eclipse / swt / graphics / Image.java
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/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.graphics;
import org.eclipse.swt.internal.gdip.*;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.*;
import java.io.*;
/**
* Instances of this class are graphics which have been prepared
* for display on a specific device. That is, they are ready
* to paint using methods such as <code>GC.drawImage()</code>
* and display on widgets with, for example, <code>Button.setImage()</code>.
* <p>
* If loaded from a file format that supports it, an
* <code>Image</code> may have transparency, meaning that certain
* pixels are specified as being transparent when drawn. Examples
* of file formats that support transparency are GIF and PNG.
* </p><p>
* There are two primary ways to use <code>Images</code>.
* The first is to load a graphic file from disk and create an
* <code>Image</code> from it. This is done using an <code>Image</code>
* constructor, for example:
* <pre>
* Image i = new Image(device, "C:\\graphic.bmp");
* </pre>
* A graphic file may contain a color table specifying which
* colors the image was intended to possess. In the above example,
* these colors will be mapped to the closest available color in
* SWT. It is possible to get more control over the mapping of
* colors as the image is being created, using code of the form:
* <pre>
* ImageData data = new ImageData("C:\\graphic.bmp");
* RGB[] rgbs = data.getRGBs();
* // At this point, rgbs contains specifications of all
* // the colors contained within this image. You may
* // allocate as many of these colors as you wish by
* // using the Color constructor Color(RGB), then
* // create the image:
* Image i = new Image(device, data);
* </pre>
* <p>
* Applications which require even greater control over the image
* loading process should use the support provided in class
* <code>ImageLoader</code>.
* </p><p>
* Application code must explicitly invoke the <code>Image.dispose()</code>
* method to release the operating system resources managed by each instance
* when those instances are no longer required.
* </p>
*
* @see Color
* @see ImageData
* @see ImageLoader
*/
public final class Image extends Resource implements Drawable {
/**
* specifies whether the receiver is a bitmap or an icon
* (one of <code>SWT.BITMAP</code>, <code>SWT.ICON</code>)
*/
public int type;
/**
* the handle to the OS image resource
* (Warning: This field is platform dependent)
* <p>
* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
* </p>
*/
public int handle;
/**
* specifies the transparent pixel
*/
int transparentPixel = -1;
/**
* the GC which is drawing on the image
*/
GC memGC;
/**
* the alpha data for the image
*/
byte[] alphaData;
/**
* the global alpha value to be used for every pixel
*/
int alpha = -1;
/**
* the image data used to create this image if it is a
* icon. Used only in WinCE
*/
ImageData data;
/**
* specifies the default scanline padding
*/
static final int DEFAULT_SCANLINE_PAD = 4;
/**
* Prevents uninitialized instances from being created outside the package.
*/
Image () {
}
/**
* Constructs an empty instance of this class with the
* specified width and height. The result may be drawn upon
* by creating a GC and using any of its drawing operations,
* as shown in the following example:
* <pre>
* Image i = new Image(device, width, height);
* GC gc = new GC(i);
* gc.drawRectangle(0, 0, 50, 50);
* gc.dispose();
* </pre>
* <p>
* Note: Some platforms may have a limitation on the size
* of image that can be created (size depends on width, height,
* and depth). For example, Windows 95, 98, and ME do not allow
* images larger than 16M.
* </p>
*
* @param device the device on which to create the image
* @param width the width of the new image
* @param height the height of the new image
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_INVALID_ARGUMENT - if either the width or height is negative or zero</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, int width, int height) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(device, width, height);
if (device.tracking) device.new_Object(this);
}
/**
* Constructs a new instance of this class based on the
* provided image, with an appearance that varies depending
* on the value of the flag. The possible flag values are:
* <dl>
* <dt><b>IMAGE_COPY</b></dt>
* <dd>the result is an identical copy of srcImage</dd>
* <dt><b>IMAGE_DISABLE</b></dt>
* <dd>the result is a copy of srcImage which has a <em>disabled</em> look</dd>
* <dt><b>IMAGE_GRAY</b></dt>
* <dd>the result is a copy of srcImage which has a <em>gray scale</em> look</dd>
* </dl>
*
* @param device the device on which to create the image
* @param srcImage the image to use as the source
* @param flag the style, either <code>IMAGE_COPY</code>, <code>IMAGE_DISABLE</code> or <code>IMAGE_GRAY</code>
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if srcImage is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the flag is not one of <code>IMAGE_COPY</code>, <code>IMAGE_DISABLE</code> or <code>IMAGE_GRAY</code></li>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon, or
* is otherwise in an invalid state</li>
* <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the Image is not supported</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, Image srcImage, int flag) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
this.device = device;
if (srcImage == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (srcImage.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
switch (flag) {
case SWT.IMAGE_COPY: {
Rectangle r = srcImage.getBounds();
this.type = srcImage.type;
switch (type) {
case SWT.BITMAP:
/* Get the HDC for the device */
int hDC = device.internal_new_GC(null);
/* Copy the bitmap */
int hdcSource = OS.CreateCompatibleDC(hDC);
int hdcDest = OS.CreateCompatibleDC(hDC);
int hOldSrc = OS.SelectObject(hdcSource, srcImage.handle);
handle = OS.CreateCompatibleBitmap(hdcSource, r.width, r.height);
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int hOldDest = OS.SelectObject(hdcDest, handle);
OS.BitBlt(hdcDest, 0, 0, r.width, r.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;
alpha = srcImage.alpha;
if (srcImage.alphaData != null) {
alphaData = new byte[srcImage.alphaData.length];
System.arraycopy(srcImage.alphaData, 0, alphaData, 0, alphaData.length);
}
break;
case SWT.ICON:
if (OS.IsWinCE) {
init(device, srcImage.data);
} else {
handle = OS.CopyImage(srcImage.handle, OS.IMAGE_ICON, r.width, r.height, 0);
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
}
break;
default:
SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
}
if (device.tracking) device.new_Object(this);
return;
}
case SWT.IMAGE_DISABLE: {
Rectangle r = srcImage.getBounds();
this.type = srcImage.type;
byte[] rgbBwBitmapInfo = {
40,0,0,0, /* biSize */
(byte)(r.width & 0xFF), /* biWidth */
(byte)((r.width & 0xFF00) >> 8),
(byte)((r.width & 0xFF0000) >> 16),
(byte)((r.width & 0xFF000000) >> 24),
(byte)(r.height & 0xFF), /* biHeight */
(byte)((r.height & 0xFF00) >> 8),
(byte)((r.height & 0xFF0000) >> 16),
(byte)((r.height & 0xFF000000) >> 24),
1,0, /* biPlanes */
1,0, /* biBitCount */
0,0,0,0, /* biCompression */
0,0,0,0, /* biSizeImage */
0,0,0,0, /* biXPelsPerMeter */
0,0,0,0, /* biYPelsPerMeter */
0,0,0,0, /* biClrUsed */
0,0,0,0, /* biClrImportant */
0,0,0,0, /* First color: black */
(byte)0xFF,(byte)0xFF,(byte)0xFF,0 /* Second color: white */
};
/* Get the HDC for the device */
int hDC = device.internal_new_GC(null);
/* Source DC */
int hdcSource = OS.CreateCompatibleDC(hDC);
if (hdcSource == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* Monochrome (Intermediate) DC */
int bwDC = OS.CreateCompatibleDC(hdcSource);
if (bwDC == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* Destination DC */
int hdcBmp = OS.CreateCompatibleDC(hDC);
if (hdcBmp == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* Monochrome (Intermediate) DIB section */
int[] pbitsBW = new int[1];
int hbmBW = OS.CreateDIBSection(bwDC, rgbBwBitmapInfo, OS.DIB_RGB_COLORS, pbitsBW, 0, 0);
if (hbmBW == 0) SWT.error(SWT.ERROR_NO_HANDLES);
switch (type) {
case SWT.BITMAP:
/* Attach the bitmap to the source DC */
int hOldSrc = OS.SelectObject(hdcSource, srcImage.handle);
/* Create the destination bitmap */
handle = OS.CreateCompatibleBitmap(hDC, r.width, r.height);
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* Attach the DIB section and the new bitmap to the DCs */
int hOldBw = OS.SelectObject(bwDC, hbmBW);
int hOldBmp = OS.SelectObject(hdcBmp, handle);
/* BitBlt the bitmap into the monochrome DIB section */
OS.BitBlt(bwDC, 0, 0, r.width, r.height, hdcSource, 0, 0, OS.SRCCOPY);
/* Paint the destination rectangle in gray */
RECT rect = new RECT();
rect.left = 0;
rect.top = 0;
rect.right = r.width;
rect.bottom = r.height;
OS.FillRect(hdcBmp, rect, OS.GetSysColorBrush(OS.COLOR_3DFACE));
/*
* BitBlt the black bits in the monochrome bitmap into
* COLOR_3DHILIGHT bits in the destination DC.
* The magic ROP comes from Charles Petzold's book
*/
int hb = OS.CreateSolidBrush(OS.GetSysColor(OS.COLOR_3DHILIGHT));
int oldBrush = OS.SelectObject(hdcBmp, hb);
OS.BitBlt(hdcBmp, 1, 1, r.width, r.height, bwDC, 0, 0, 0xB8074A);
/*
* BitBlt the black bits in the monochrome bitmap into
* COLOR_3DSHADOW bits in the destination DC.
*/
hb = OS.CreateSolidBrush(OS.GetSysColor(OS.COLOR_3DSHADOW));
OS.DeleteObject(OS.SelectObject(hdcBmp, hb));
OS.BitBlt(hdcBmp, 0, 0, r.width, r.height, bwDC, 0, 0, 0xB8074A);
OS.DeleteObject(OS.SelectObject(hdcBmp, oldBrush));
/* Free resources */
OS.SelectObject(hdcSource, hOldSrc);
OS.SelectObject(hdcBmp, hOldBmp);
OS.SelectObject(bwDC, hOldBw);
OS.DeleteDC(hdcSource);
OS.DeleteDC(bwDC);
OS.DeleteDC(hdcBmp);
OS.DeleteObject(hbmBW);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
break;
case SWT.ICON:
/* Get icon information */
ICONINFO iconInfo = new ICONINFO();
if (OS.IsWinCE) {
GetIconInfo(srcImage, iconInfo);
} else {
if (!OS.GetIconInfo(srcImage.handle, iconInfo))
SWT.error(SWT.ERROR_INVALID_IMAGE);
}
int hdcMask = OS.CreateCompatibleDC(hDC);
/* Create the destination bitmaps */
if (iconInfo.hbmColor == 0)
hOldSrc = OS.SelectObject(hdcSource, iconInfo.hbmMask);
else
hOldSrc = OS.SelectObject(hdcSource, iconInfo.hbmColor);
int newHbmp = OS.CreateCompatibleBitmap(hdcSource, r.width, r.height);
if (newHbmp == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int newHmask = OS.CreateBitmap(r.width, r.height, 1, 1, null);
if (newHmask == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* BitBlt the source mask into the destination mask */
int hOldMask = OS.SelectObject(hdcMask, newHmask);
if (iconInfo.hbmColor != 0)
OS.SelectObject(hdcSource, iconInfo.hbmMask);
OS.SelectObject(hdcSource, iconInfo.hbmMask);
OS.BitBlt(hdcMask, 0, 0, r.width, r.height, hdcSource, 0, 0, OS.SRCCOPY);
/* Attach the monochrome DIB section and the destination bitmap to the DCs */
hOldBw = OS.SelectObject(bwDC, hbmBW);
/* BitBlt the bitmap into the monochrome DIB section */
if (iconInfo.hbmColor == 0) {
OS.SelectObject(hdcSource, iconInfo.hbmMask);
OS.BitBlt(bwDC, 0, 0, r.width, r.height, hdcSource, 0, r.height, OS.SRCCOPY);
} else {
OS.SelectObject(hdcSource, iconInfo.hbmColor);
OS.BitBlt(bwDC, 0, 0, r.width, r.height, hdcSource, 0, 0, OS.SRCCOPY);
}
/* Paint the destination rectangle in grey */
rect = new RECT();
rect.left = 0;
rect.top = 0;
rect.right = r.width;
rect.bottom = r.height;
hOldBmp = OS.SelectObject(hdcBmp, newHbmp);
OS.FillRect(hdcBmp, rect, OS.GetSysColorBrush(OS.COLOR_3DFACE));
/*
* BitBlt the black bits in the monochrome bitmap into
* COLOR_3DHILIGHT bits in the destination DC.
* The magic ROP comes from Charles Petzold's book
*/
hb = OS.CreateSolidBrush(OS.GetSysColor(OS.COLOR_3DSHADOW));
oldBrush = OS.SelectObject(hdcBmp, hb);
OS.BitBlt(hdcBmp, 0, 0, r.width, r.height, bwDC, 0, 0, 0xB8074A);
/* Invert mask into hdcBw */
OS.BitBlt(bwDC, 0, 0, r.width, r.height, hdcMask, 0, 0, OS.NOTSRCCOPY);
/* Select black brush into destination */
hb = OS.CreateSolidBrush(0);
OS.DeleteObject(OS.SelectObject(hdcBmp, hb));
/*
* Copy black bits from monochrome bitmap into black bits in the
* destination DC.
*/
OS.BitBlt(hdcBmp, 0, 0, r.width, r.height, bwDC, 0, 0, 0xB8074A);
OS.DeleteObject(OS.SelectObject(hdcBmp, oldBrush));
/* Free resources */
OS.SelectObject(hdcSource, hOldSrc);
OS.DeleteDC(hdcSource);
OS.SelectObject(bwDC, hOldBw);
OS.DeleteDC(bwDC);
OS.SelectObject(hdcBmp, hOldBmp);
OS.DeleteDC(hdcBmp);
OS.SelectObject(hdcMask, hOldMask);
OS.DeleteDC(hdcMask);
OS.DeleteObject(hbmBW);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
/* Create the new iconinfo */
ICONINFO newIconInfo = new ICONINFO();
newIconInfo.fIcon = iconInfo.fIcon;
newIconInfo.hbmMask = newHmask;
newIconInfo.hbmColor = newHbmp;
/* Create the new icon */
handle = OS.CreateIconIndirect(newIconInfo);
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* Free bitmaps */
OS.DeleteObject(newHbmp);
OS.DeleteObject(newHmask);
if (iconInfo.hbmColor != 0)
OS.DeleteObject(iconInfo.hbmColor);
OS.DeleteObject(iconInfo.hbmMask);
break;
default:
SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
}
if (device.tracking) device.new_Object(this);
return;
}
case SWT.IMAGE_GRAY: {
Rectangle r = srcImage.getBounds();
ImageData data = srcImage.getImageData();
PaletteData palette = data.palette;
ImageData newData = data;
if (!palette.isDirect) {
/* Convert the palette entries to gray. */
RGB [] rgbs = palette.getRGBs();
for (int i=0; i<rgbs.length; i++) {
if (data.transparentPixel != i) {
RGB color = rgbs [i];
int red = color.red;
int green = color.green;
int blue = color.blue;
int intensity = (red+red+green+green+green+green+green+blue) >> 3;
color.red = color.green = color.blue = intensity;
}
}
newData.palette = new PaletteData(rgbs);
} else {
/* Create a 8 bit depth image data with a gray palette. */
RGB[] rgbs = new RGB[256];
for (int i=0; i<rgbs.length; i++) {
rgbs[i] = new RGB(i, i, i);
}
newData = new ImageData(r.width, r.height, 8, new PaletteData(rgbs));
newData.maskData = data.maskData;
newData.maskPad = data.maskPad;
if (data.transparentPixel != -1) newData.transparentPixel = 254;
/* Convert the pixels. */
int[] scanline = new int[r.width];
int redMask = palette.redMask;
int greenMask = palette.greenMask;
int blueMask = palette.blueMask;
int redShift = palette.redShift;
int greenShift = palette.greenShift;
int blueShift = palette.blueShift;
for (int y=0; y<r.height; y++) {
int offset = y * newData.bytesPerLine;
data.getPixels(0, y, r.width, scanline, 0);
for (int x=0; x<r.width; x++) {
int pixel = scanline[x];
if (pixel != data.transparentPixel) {
int red = pixel & redMask;
red = (redShift < 0) ? red >>> -redShift : red << redShift;
int green = pixel & greenMask;
green = (greenShift < 0) ? green >>> -greenShift : green << greenShift;
int blue = pixel & blueMask;
blue = (blueShift < 0) ? blue >>> -blueShift : blue << blueShift;
int intensity = (red+red+green+green+green+green+green+blue) >> 3;
if (newData.transparentPixel == intensity) intensity = 255;
newData.data[offset] = (byte)intensity;
} else {
newData.data[offset] = (byte)254;
}
offset++;
}
}
}
init (device, newData);
if (device.tracking) device.new_Object(this);
return;
}
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
}
/**
* Constructs an empty instance of this class with the
* width and height of the specified rectangle. The result
* may be drawn upon by creating a GC and using any of its
* drawing operations, as shown in the following example:
* <pre>
* Image i = new Image(device, boundsRectangle);
* GC gc = new GC(i);
* gc.drawRectangle(0, 0, 50, 50);
* gc.dispose();
* </pre>
* <p>
* Note: Some platforms may have a limitation on the size
* of image that can be created (size depends on width, height,
* and depth). For example, Windows 95, 98, and ME do not allow
* images larger than 16M.
* </p>
*
* @param device the device on which to create the image
* @param bounds a rectangle specifying the image's width and height (must not be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the bounds rectangle is null</li>
* <li>ERROR_INVALID_ARGUMENT - if either the rectangle's width or height is negative</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, Rectangle bounds) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(device, bounds.width, bounds.height);
if (device.tracking) device.new_Object(this);
}
/**
* Constructs an instance of this class from the given
* <code>ImageData</code>.
*
* @param device the device on which to create the image
* @param data the image data to create the image from (must not be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the image data is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the ImageData is not supported</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, ImageData data) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(device, data);
if (device.tracking) device.new_Object(this);
}
/**
* Constructs an instance of this class, whose type is
* <code>SWT.ICON</code>, from the two given <code>ImageData</code>
* objects. The two images must be the same size. Pixel transparency
* in either image will be ignored.
* <p>
* The mask image should contain white wherever the icon is to be visible,
* and black wherever the icon is to be transparent. In addition,
* the source image should contain black wherever the icon is to be
* transparent.
* </p>
*
* @param device the device on which to create the icon
* @param source the color data for the icon
* @param mask the mask data for the icon
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if either the source or mask is null </li>
* <li>ERROR_INVALID_ARGUMENT - if source and mask are different sizes</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image(Device device, ImageData source, ImageData mask) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (mask == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (source.width != mask.width || source.height != mask.height) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
mask = ImageData.convertMask(mask);
init(device, this, source, mask);
if (device.tracking) device.new_Object(this);
}
/**
* Constructs an instance of this class by loading its representation
* from the specified input stream. Throws an error if an error
* occurs while loading the image, or if the result is an image
* of an unsupported type. Application code is still responsible
* for closing the input stream.
* <p>
* This constructor is provided for convenience when loading a single
* image only. If the stream contains multiple images, only the first
* one will be loaded. To load multiple images, use
* <code>ImageLoader.load()</code>.
* </p><p>
* This constructor may be used to load a resource as follows:
* </p>
* <pre>
* static Image loadImage (Display display, Class clazz, String string) {
* InputStream stream = clazz.getResourceAsStream (string);
* if (stream == null) return null;
* Image image = null;
* try {
* image = new Image (display, stream);
* } catch (SWTException ex) {
* } finally {
* try {
* stream.close ();
* } catch (IOException ex) {}
* }
* return image;
* }
* </pre>
*
* @param device the device on which to create the image
* @param stream the input stream to load the image from
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the stream is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_INVALID_IMAGE - if the image file contains invalid data </li>
* <li>ERROR_IO - if an IO error occurs while reading data</li>
* <li>ERROR_UNSUPPORTED_DEPTH - if the InputStream describes an image with an unsupported depth</li>
* <li>ERROR_UNSUPPORTED_FORMAT - if the image file contains an unrecognized format</li>
* * </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image (Device device, InputStream stream) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(device, new ImageData(stream));
if (device.tracking) device.new_Object(this);
}
/**
* Constructs an instance of this class by loading its representation
* from the file with the specified name. Throws an error if an error
* occurs while loading the image, or if the result is an image
* of an unsupported type.
* <p>
* This constructor is provided for convenience when loading
* a single image only. If the specified file contains
* multiple images, only the first one will be used.
*
* @param device the device on which to create the image
* @param filename the name of the file to load the image from
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
* <li>ERROR_NULL_ARGUMENT - if the file name is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_INVALID_IMAGE - if the image file contains invalid data </li>
* <li>ERROR_IO - if an IO error occurs while reading data</li>
* <li>ERROR_UNSUPPORTED_DEPTH - if the image file has an unsupported depth</li>
* <li>ERROR_UNSUPPORTED_FORMAT - if the image file contains an unrecognized format</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li>
* </ul>
*/
public Image (Device device, String filename) {
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(device, new ImageData(filename));
if (device.tracking) device.new_Object(this);
}
/**
* Create a DIB from a DDB without using GetDIBits. Note that
* the DDB should not be selected into a HDC.
*/
int createDIBFromDDB(int hDC, int hBitmap, int width, int height) {
/* Determine the DDB depth */
int bits = OS.GetDeviceCaps (hDC, OS.BITSPIXEL);
int planes = OS.GetDeviceCaps (hDC, OS.PLANES);
int depth = bits * planes;
/* Determine the DIB palette */
boolean isDirect = depth > 8;
RGB[] rgbs = null;
if (!isDirect) {
int numColors = 1 << depth;
byte[] logPalette = new byte[4 * numColors];
OS.GetPaletteEntries(device.hPalette, 0, numColors, logPalette);
rgbs = new RGB[numColors];
for (int i = 0; i < numColors; i++) {
rgbs[i] = new RGB(logPalette[i] & 0xFF, logPalette[i + 1] & 0xFF, logPalette[i + 2] & 0xFF);
}
}
boolean useBitfields = OS.IsWinCE && (depth == 16 || depth == 32);
BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmiHeader.biWidth = width;
bmiHeader.biHeight = -height;
bmiHeader.biPlanes = 1;
bmiHeader.biBitCount = (short)depth;
if (useBitfields) bmiHeader.biCompression = OS.BI_BITFIELDS;
else bmiHeader.biCompression = OS.BI_RGB;
byte[] bmi;
if (isDirect) bmi = new byte[BITMAPINFOHEADER.sizeof + (useBitfields ? 12 : 0)];
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 (isDirect) {
if (useBitfields) {
int redMask = 0;
int greenMask = 0;
int blueMask = 0;
switch (depth) {
case 16:
redMask = 0x7C00;
greenMask = 0x3E0;
blueMask = 0x1F;
/* little endian */
bmi[offset] = (byte)((redMask & 0xFF) >> 0);
bmi[offset + 1] = (byte)((redMask & 0xFF00) >> 8);
bmi[offset + 2] = (byte)((redMask & 0xFF0000) >> 16);
bmi[offset + 3] = (byte)((redMask & 0xFF000000) >> 24);
bmi[offset + 4] = (byte)((greenMask & 0xFF) >> 0);
bmi[offset + 5] = (byte)((greenMask & 0xFF00) >> 8);
bmi[offset + 6] = (byte)((greenMask & 0xFF0000) >> 16);
bmi[offset + 7] = (byte)((greenMask & 0xFF000000) >> 24);
bmi[offset + 8] = (byte)((blueMask & 0xFF) >> 0);
bmi[offset + 9] = (byte)((blueMask & 0xFF00) >> 8);
bmi[offset + 10] = (byte)((blueMask & 0xFF0000) >> 16);
bmi[offset + 11] = (byte)((blueMask & 0xFF000000) >> 24);
break;
case 32:
redMask = 0xFF00;
greenMask = 0xFF0000;
blueMask = 0xFF000000;
/* big endian */
bmi[offset] = (byte)((redMask & 0xFF000000) >> 24);
bmi[offset + 1] = (byte)((redMask & 0xFF0000) >> 16);
bmi[offset + 2] = (byte)((redMask & 0xFF00) >> 8);
bmi[offset + 3] = (byte)((redMask & 0xFF) >> 0);
bmi[offset + 4] = (byte)((greenMask & 0xFF000000) >> 24);
bmi[offset + 5] = (byte)((greenMask & 0xFF0000) >> 16);
bmi[offset + 6] = (byte)((greenMask & 0xFF00) >> 8);
bmi[offset + 7] = (byte)((greenMask & 0xFF) >> 0);
bmi[offset + 8] = (byte)((blueMask & 0xFF000000) >> 24);
bmi[offset + 9] = (byte)((blueMask & 0xFF0000) >> 16);
bmi[offset + 10] = (byte)((blueMask & 0xFF00) >> 8);
bmi[offset + 11] = (byte)((blueMask & 0xFF) >> 0);
break;
default:
SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
}
}
} else {
for (int j = 0; j < rgbs.length; j++) {
bmi[offset] = (byte)rgbs[j].blue;
bmi[offset + 1] = (byte)rgbs[j].green;
bmi[offset + 2] = (byte)rgbs[j].red;
bmi[offset + 3] = 0;
offset += 4;
}
}
int[] pBits = new int[1];
int hDib = OS.CreateDIBSection(0, bmi, OS.DIB_RGB_COLORS, pBits, 0, 0);
if (hDib == 0) SWT.error(SWT.ERROR_NO_HANDLES);
/* Bitblt DDB into DIB */
int hdcSource = OS.CreateCompatibleDC(hDC);
int hdcDest = OS.CreateCompatibleDC(hDC);
int hOldSrc = OS.SelectObject(hdcSource, hBitmap);
int hOldDest = OS.SelectObject(hdcDest, hDib);
OS.BitBlt(hdcDest, 0, 0, width, height, hdcSource, 0, 0, OS.SRCCOPY);
OS.SelectObject(hdcSource, hOldSrc);
OS.SelectObject(hdcDest, hOldDest);
OS.DeleteDC(hdcSource);
OS.DeleteDC(hdcDest);
return hDib;
}
int[] createGdipImage() {
switch (type) {
case SWT.BITMAP: {
if (alpha != -1 || alphaData != null || transparentPixel != -1) {
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
int imgWidth = bm.bmWidth;
int imgHeight = bm.bmHeight;
int hDC = device.internal_new_GC(null);
int srcHdc = OS.CreateCompatibleDC(hDC);
int oldSrcBitmap = OS.SelectObject(srcHdc, handle);
int memHdc = OS.CreateCompatibleDC(hDC);
int memDib = createDIB(imgWidth, imgHeight, 32);
if (memDib == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int 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);
byte red = 0, green = 0, blue = 0;
if (transparentPixel != -1) {
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:
blue = (byte)((transparentPixel & 0x1F) << 3);
green = (byte)((transparentPixel & 0x3E0) >> 2);
red = (byte)((transparentPixel & 0x7C00) >> 7);
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;
}
}
}
OS.SelectObject(srcHdc, oldSrcBitmap);
OS.SelectObject(memHdc, oldMemBitmap);
OS.DeleteObject(srcHdc);
OS.DeleteObject(memHdc);
byte[] srcData = new byte[sizeInBytes];
OS.MoveMemory(srcData, dibBM.bmBits, sizeInBytes);
OS.DeleteObject(memDib);
device.internal_dispose_GC(hDC, null);
if (alpha != -1) {
for (int y = 0, dp = 0; y < imgHeight; ++y) {
for (int x = 0; x < imgWidth; ++x) {
srcData[dp + 3] = (byte)alpha;
dp += 4;
}
}
} else if (alphaData != null) {
for (int y = 0, dp = 0, ap = 0; y < imgHeight; ++y) {
for (int x = 0; x < imgWidth; ++x) {
srcData[dp + 3] = alphaData[ap++];
dp += 4;
}
}
} else if (transparentPixel != -1) {
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;
}
}
}
int hHeap = OS.GetProcessHeap();
int pixels = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, srcData.length);
OS.MoveMemory(pixels, srcData, sizeInBytes);
return new int[]{Gdip.Bitmap_new(imgWidth, imgHeight, dibBM.bmWidthBytes, Gdip.PixelFormat32bppARGB, pixels), pixels};
}
return new int[]{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();
if (OS.IsWinCE) {
GetIconInfo(this, iconInfo);
} else {
OS.GetIconInfo(handle, iconInfo);
}
int 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;
int img = 0, pixels = 0;
if (imgWidth > imgHeight) {
int hDC = device.internal_new_GC(null);
int srcHdc = OS.CreateCompatibleDC(hDC);
int oldSrcBitmap = OS.SelectObject(srcHdc, hBitmap);
int memHdc = OS.CreateCompatibleDC(hDC);
int memDib = createDIB(imgWidth, imgHeight, 32);
if (memDib == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int 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 = 0; y < imgHeight; ++y) {
for (int x = 0; x < imgWidth; ++x) {
if (OS.GetPixel(srcHdc, x, y) != 0) {
srcData[dp + 3] = (byte)0;
} else {
srcData[dp + 3] = (byte)0xFF;
}
dp += 4;
}
}
OS.SelectObject(srcHdc, oldSrcBitmap);
OS.DeleteObject(srcHdc);
device.internal_dispose_GC(hDC, null);
int hHeap = OS.GetProcessHeap();
pixels = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, srcData.length);
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 int[]{img, pixels};
}
default: SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
}
return null;
}
/**
* Disposes of the operating system resources associated with
* the image. Applications must dispose of all images which
* they allocate.
*/
public void dispose () {
if (handle == 0) return;
if (device.isDisposed()) return;
if (memGC != null) memGC.dispose();
if (type == SWT.ICON) {
if (OS.IsWinCE) data = null;
OS.DestroyIcon (handle);
} else {
OS.DeleteObject (handle);
}
handle = 0;
memGC = null;
if (device.tracking) device.dispose_Object(this);
device = null;
}
/**
* Compares the argument to the receiver, and returns true
* if they represent the <em>same</em> object using a class
* specific comparison.
*
* @param object the object to compare with this object
* @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
*
* @see #hashCode
*/
public boolean equals (Object object) {
if (object == this) return true;
if (!(object instanceof Image)) return false;
Image image = (Image) object;
return device == image.device && handle == image.handle;
}
/**
* Returns the color to which to map the transparent pixel, or null if
* the receiver has no transparent pixel.
* <p>
* There are certain uses of Images that do not support transparency
* (for example, setting an image into a button or label). In these cases,
* it may be desired to simulate transparency by using the background
* color of the widget to paint the transparent pixels of the image.
* Use this method to check which color will be used in these cases
* in place of transparency. This value may be set with setBackground().
* <p>
*
* @return the background color of the image, or null if there is no transparency in the image
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Color getBackground() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (transparentPixel == -1) return null;
/* Get the HDC for the device */
int hDC = device.internal_new_GC(null);
/* Compute the background color */
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
int hdcMem = OS.CreateCompatibleDC(hDC);
int hOldObject = OS.SelectObject(hdcMem, handle);
int red = 0, green = 0, blue = 0;
if (bm.bmBitsPixel <= 8) {
if (OS.IsWinCE) {
byte[] pBits = new byte[1];
OS.MoveMemory(pBits, bm.bmBits, 1);
byte oldValue = pBits[0];
int mask = (0xFF << (8 - bm.bmBitsPixel)) & 0x00FF;
pBits[0] = (byte)((transparentPixel << (8 - bm.bmBitsPixel)) | (pBits[0] & ~mask));
OS.MoveMemory(bm.bmBits, pBits, 1);
int color = OS.GetPixel(hdcMem, 0, 0);
pBits[0] = oldValue;
OS.MoveMemory(bm.bmBits, pBits, 1);
blue = (color & 0xFF0000) >> 16;
green = (color & 0xFF00) >> 8;
red = color & 0xFF;
} else {
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, 0x02000000 | (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
*
* @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);
switch (type) {
case SWT.BITMAP:
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
return new Rectangle(0, 0, bm.bmWidth, bm.bmHeight);
case SWT.ICON:
if (OS.IsWinCE) {
return new Rectangle(0, 0, data.width, data.height);
} else {
ICONINFO info = new ICONINFO();
OS.GetIconInfo(handle, info);
int 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, bm.bmWidth, bm.bmHeight);
}
default:
SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
return null;
}
}
/**
* Returns an <code>ImageData</code> based on the receiver
* Modifications made to this <code>ImageData</code> will not
* affect the Image.
*
* @return an <code>ImageData</code> containing the image's data and attributes
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon</li>
* </ul>
*
* @see ImageData
*/
public ImageData getImageData() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
BITMAP bm;
int depth, width, height;
switch (type) {
case SWT.ICON: {
if (OS.IsWinCE) return data;
ICONINFO info = new ICONINFO();
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetIconInfo(handle, info);
/* Get the basic BITMAP information */
int 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 */
int hDC = device.internal_new_GC(null);
/* Create the DC and select the bitmap */
int hBitmapDC = OS.CreateCompatibleDC(hDC);
int hOldBitmap = OS.SelectObject(hBitmapDC, hBitmap);
/* Select the palette if necessary */
int oldPalette = 0;
if (depth <= 8) {
int hPalette = device.hPalette;
if (hPalette != 0) {
oldPalette = OS.SelectPalette(hBitmapDC, hPalette, false);
OS.RealizePalette(hBitmapDC);
}
}
/* Find the size of the image and allocate data */
int imageSize;
/* Call with null lpBits to get the image size */
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetDIBits(hBitmapDC, hBitmap, 0, height, 0, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(bmiHeader, bmi, BITMAPINFOHEADER.sizeof);
imageSize = bmiHeader.biSizeImage;
byte[] data = new byte[imageSize];
/* Get the bitmap data */
int hHeap = OS.GetProcessHeap();
int lpvBits = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, imageSize);
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetDIBits(hBitmapDC, hBitmap, 0, height, lpvBits, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(data, lpvBits, imageSize);
/* 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;
if (info.hbmColor == 0) {
/* Do the bottom half of the mask */
maskData = new byte[imageSize];
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetDIBits(hBitmapDC, hBitmap, height, height, lpvBits, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(maskData, lpvBits, imageSize);
} 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 */
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetDIBits(hBitmapDC, info.hbmMask, 0, height, 0, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(bmiHeader, bmi, BITMAPINFOHEADER.sizeof);
imageSize = bmiHeader.biSizeImage;
maskData = new byte[imageSize];
int lpvMaskBits = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, imageSize);
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetDIBits(hBitmapDC, info.hbmMask, 0, height, lpvMaskBits, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(maskData, lpvMaskBits, imageSize);
OS.HeapFree(hHeap, 0, lpvMaskBits);
/* Loop to invert the mask */
for (int i = 0; i < maskData.length; i++) {
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);
}
/* Clean up */
OS.HeapFree(hHeap, 0, lpvBits);
OS.SelectObject(hBitmapDC, hOldBitmap);
if (oldPalette != 0) {
OS.SelectPalette(hBitmapDC, oldPalette, false);
OS.RealizePalette(hBitmapDC);
}
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.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 */
int hDC = device.internal_new_GC(null);
/*
* Feature in WinCE. GetDIBits is not available in WinCE. The
* workaround is to create a temporary DIB from the DDB and use
* the bmBits field of DIBSECTION to retrieve the image data.
*/
int handle = this.handle;
if (OS.IsWinCE) {
if (!isDib) {
boolean mustRestore = false;
if (memGC != null && !memGC.isDisposed()) {
memGC.flush ();
mustRestore = true;
GCData data = memGC.data;
if (data.hNullBitmap != 0) {
OS.SelectObject(memGC.handle, data.hNullBitmap);
data.hNullBitmap = 0;
}
}
handle = createDIBFromDDB(hDC, this.handle, width, height);
if (mustRestore) {
int hOldBitmap = OS.SelectObject(memGC.handle, this.handle);
memGC.data.hNullBitmap = hOldBitmap;
}
isDib = true;
}
}
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 */
int hBitmapDC = OS.CreateCompatibleDC(hDC);
int hOldBitmap = OS.SelectObject(hBitmapDC, handle);
/* Select the palette if necessary */
int oldPalette = 0;
if (!isDib && depth <= 8) {
int hPalette = device.hPalette;
if (hPalette != 0) {
oldPalette = OS.SelectPalette(hBitmapDC, hPalette, false);
OS.RealizePalette(hBitmapDC);
}
}
/* 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 */
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetDIBits(hBitmapDC, handle, 0, height, 0, 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) {
if (OS.IsWinCE && this.handle != handle) {
/* get image data from the temporary DIB */
OS.MoveMemory(data, dib.bmBits, imageSize);
} else {
OS.MoveMemory(data, bm.bmBits, imageSize);
}
} else {
int hHeap = OS.GetProcessHeap();
int lpvBits = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, imageSize);
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.GetDIBits(hBitmapDC, handle, 0, height, lpvBits, bmi, OS.DIB_RGB_COLORS);
OS.MoveMemory(data, lpvBits, imageSize);
OS.HeapFree(hHeap, 0, lpvBits);
}
/* Calculate the palette */
PaletteData palette = null;
if (depth <= 8) {
RGB[] rgbs = new RGB[numColors];
if (isDib) {
if (OS.IsWinCE) {
/*
* Feature on WinCE. GetDIBColorTable is not supported.
* The workaround is to set a pixel to the desired
* palette index and use getPixel to get the corresponding
* RGB value.
*/
int red = 0, green = 0, blue = 0;
byte[] pBits = new byte[1];
OS.MoveMemory(pBits, bm.bmBits, 1);
byte oldValue = pBits[0];
int mask = (0xFF << (8 - bm.bmBitsPixel)) & 0x00FF;
for (int i = 0; i < numColors; i++) {
pBits[0] = (byte)((i << (8 - bm.bmBitsPixel)) | (pBits[0] & ~mask));
OS.MoveMemory(bm.bmBits, pBits, 1);
int color = OS.GetPixel(hBitmapDC, 0, 0);
blue = (color & 0xFF0000) >> 16;
green = (color & 0xFF00) >> 8;
red = color & 0xFF;
rgbs[i] = new RGB(red, green, blue);
}
pBits[0] = oldValue;
OS.MoveMemory(bm.bmBits, pBits, 1);
} else {
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);
if (oldPalette != 0) {
OS.SelectPalette(hBitmapDC, oldPalette, false);
OS.RealizePalette(hBitmapDC);
}
if (OS.IsWinCE) {
if (handle != this.handle) {
/* free temporary DIB */
OS.DeleteObject (handle);
}
}
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;
imageData.alpha = alpha;
if (alpha == -1 && alphaData != null) {
imageData.alphaData = new byte[alphaData.length];
System.arraycopy(alphaData, 0, imageData.alphaData, 0, alphaData.length);
}
return imageData;
}
default:
SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
return null;
}
}
/**
* Returns an integer hash code for the receiver. Any two
* objects that return <code>true</code> when passed to
* <code>equals</code> must return the same value for this
* method.
*
* @return the receiver's hash
*
* @see #equals
*/
public int hashCode () {
return handle;
}
void init(Device device, int width, int height) {
if (width <= 0 || height <= 0) {
SWT.error (SWT.ERROR_INVALID_ARGUMENT);
}
this.device = device;
type = SWT.BITMAP;
int hDC = device.internal_new_GC(null);
handle = OS.CreateCompatibleBitmap(hDC, width, height);
/*
* 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;
handle = createDIB(width, height, depth);
}
if (handle != 0) {
int memDC = OS.CreateCompatibleDC(hDC);
int 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 int 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;
if (OS.IsWinCE) bmiHeader.biCompression = OS.BI_BITFIELDS;
else bmiHeader.biCompression = OS.BI_RGB;
byte[] bmi = new byte[BITMAPINFOHEADER.sizeof + (OS.IsWinCE ? 12 : 0)];
OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
/* Set the rgb colors into the bitmap info */
if (OS.IsWinCE) {
int redMask = 0xFF00;
int greenMask = 0xFF0000;
int blueMask = 0xFF000000;
/* big endian */
int offset = BITMAPINFOHEADER.sizeof;
bmi[offset] = (byte)((redMask & 0xFF000000) >> 24);
bmi[offset + 1] = (byte)((redMask & 0xFF0000) >> 16);
bmi[offset + 2] = (byte)((redMask & 0xFF00) >> 8);
bmi[offset + 3] = (byte)((redMask & 0xFF) >> 0);
bmi[offset + 4] = (byte)((greenMask & 0xFF000000) >> 24);
bmi[offset + 5] = (byte)((greenMask & 0xFF0000) >> 16);
bmi[offset + 6] = (byte)((greenMask & 0xFF00) >> 8);
bmi[offset + 7] = (byte)((greenMask & 0xFF) >> 0);
bmi[offset + 8] = (byte)((blueMask & 0xFF000000) >> 24);
bmi[offset + 9] = (byte)((blueMask & 0xFF0000) >> 16);
bmi[offset + 10] = (byte)((blueMask & 0xFF00) >> 8);
bmi[offset + 11] = (byte)((blueMask & 0xFF) >> 0);
}
int[] pBits = new int[1];
return OS.CreateDIBSection(0, bmi, OS.DIB_RGB_COLORS, pBits, 0, 0);
}
/**
* Feature in WinCE. GetIconInfo is not available in WinCE.
* The workaround is to cache the object ImageData for images
* of type SWT.ICON. The bitmaps hbmMask and hbmColor can then
* be reconstructed by using our version of getIconInfo.
* This function takes an ICONINFO object and sets the fields
* hbmMask and hbmColor with the corresponding bitmaps it has
* created.
* Note. These bitmaps must be freed - as they would have to be
* if the regular GetIconInfo had been used.
*/
static void GetIconInfo(Image image, ICONINFO info) {
int[] result = init(image.device, null, image.data);
info.hbmColor = result[0];
info.hbmMask = result[1];
}
static int[] init(Device device, Image image, ImageData i) {
if (image != null) image.device = device;
/*
* BUG in Windows 98:
* A monochrome DIBSection will display as solid black
* on Windows 98 machines, even though it contains the
* correct data. The fix is to convert 1-bit ImageData
* into 4-bit ImageData before creating the image.
*/
/* Windows does not support 2-bit images. Convert to 4-bit image. */
if ((OS.IsWin95 && i.depth == 1 && i.getTransparencyType() != SWT.TRANSPARENCY_MASK) || i.depth == 2) {
ImageData img = new ImageData(i.width, i.height, 4, i.palette);
ImageData.blit(ImageData.BLIT_SRC,
i.data, i.depth, i.bytesPerLine, i.getByteOrder(), 0, 0, i.width, i.height, null, null, null,
ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
img.data, img.depth, img.bytesPerLine, i.getByteOrder(), 0, 0, img.width, img.height, null, null, null,
false, false);
img.transparentPixel = i.transparentPixel;
img.maskPad = i.maskPad;
img.maskData = i.maskData;
img.alpha = i.alpha;
img.alphaData = i.alphaData;
i = img;
}
/*
* 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.
*/
/*
* Note on WinCE. CreateDIBSection requires the biCompression
* field of the BITMAPINFOHEADER to be set to BI_BITFIELDS for
* 16 and 32 bit direct images (see MSDN for CreateDIBSection).
* In this case, the color mask can be set to any value. For
* consistency, it is set to the same mask used by non WinCE
* platforms in BI_RGB mode.
*/
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;
switch (i.depth) {
case 8:
newDepth = 16;
newOrder = ImageData.LSB_FIRST;
newPalette = new PaletteData(0x7C00, 0x3E0, 0x1F);
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 (!(redMask == 0xFF00 && greenMask == 0xFF0000 && blueMask == 0xFF000000)) {
newPalette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
}
break;
default:
SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
}
if (newPalette != null) {
ImageData img = new ImageData(i.width, i.height, newDepth, newPalette);
ImageData.blit(ImageData.BLIT_SRC,
i.data, i.depth, i.bytesPerLine, i.getByteOrder(), 0, 0, i.width, i.height, redMask, greenMask, blueMask,
ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
img.data, img.depth, img.bytesPerLine, newOrder, 0, 0, img.width, img.height, newPalette.redMask, newPalette.greenMask, newPalette.blueMask,
false, false);
if (i.transparentPixel != -1) {
img.transparentPixel = newPalette.getPixel(palette.getRGB(i.transparentPixel));
}
img.maskPad = i.maskPad;
img.maskData = i.maskData;
img.alpha = i.alpha;
img.alphaData = i.alphaData;
i = img;
}
}
/* Construct bitmap info header by hand */
RGB[] rgbs = i.palette.getRGBs();
boolean useBitfields = OS.IsWinCE && (i.depth == 16 || i.depth == 32);
BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmiHeader.biWidth = i.width;
bmiHeader.biHeight = -i.height;
bmiHeader.biPlanes = 1;
bmiHeader.biBitCount = (short)i.depth;
if (useBitfields) bmiHeader.biCompression = OS.BI_BITFIELDS;
else bmiHeader.biCompression = OS.BI_RGB;
bmiHeader.biClrUsed = rgbs == null ? 0 : rgbs.length;
byte[] bmi;
if (i.palette.isDirect)
bmi = new byte[BITMAPINFOHEADER.sizeof + (useBitfields ? 12 : 0)];
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) {
if (useBitfields) {
PaletteData palette = i.palette;
int redMask = palette.redMask;
int greenMask = palette.greenMask;
int blueMask = palette.blueMask;
/*
* The color masks must be written based on the
* endianness of the ImageData.
*/
if (i.getByteOrder() == ImageData.LSB_FIRST) {
bmi[offset] = (byte)((redMask & 0xFF) >> 0);
bmi[offset + 1] = (byte)((redMask & 0xFF00) >> 8);
bmi[offset + 2] = (byte)((redMask & 0xFF0000) >> 16);
bmi[offset + 3] = (byte)((redMask & 0xFF000000) >> 24);
bmi[offset + 4] = (byte)((greenMask & 0xFF) >> 0);
bmi[offset + 5] = (byte)((greenMask & 0xFF00) >> 8);
bmi[offset + 6] = (byte)((greenMask & 0xFF0000) >> 16);
bmi[offset + 7] = (byte)((greenMask & 0xFF000000) >> 24);
bmi[offset + 8] = (byte)((blueMask & 0xFF) >> 0);
bmi[offset + 9] = (byte)((blueMask & 0xFF00) >> 8);
bmi[offset + 10] = (byte)((blueMask & 0xFF0000) >> 16);
bmi[offset + 11] = (byte)((blueMask & 0xFF000000) >> 24);
} else {
bmi[offset] = (byte)((redMask & 0xFF000000) >> 24);
bmi[offset + 1] = (byte)((redMask & 0xFF0000) >> 16);
bmi[offset + 2] = (byte)((redMask & 0xFF00) >> 8);
bmi[offset + 3] = (byte)((redMask & 0xFF) >> 0);
bmi[offset + 4] = (byte)((greenMask & 0xFF000000) >> 24);
bmi[offset + 5] = (byte)((greenMask & 0xFF0000) >> 16);
bmi[offset + 6] = (byte)((greenMask & 0xFF00) >> 8);
bmi[offset + 7] = (byte)((greenMask & 0xFF) >> 0);
bmi[offset + 8] = (byte)((blueMask & 0xFF000000) >> 24);
bmi[offset + 9] = (byte)((blueMask & 0xFF0000) >> 16);
bmi[offset + 10] = (byte)((blueMask & 0xFF00) >> 8);
bmi[offset + 11] = (byte)((blueMask & 0xFF) >> 0);
}
}
} else {
for (int j = 0; j < rgbs.length; j++) {
bmi[offset] = (byte)rgbs[j].blue;
bmi[offset + 1] = (byte)rgbs[j].green;
bmi[offset + 2] = (byte)rgbs[j].red;
bmi[offset + 3] = 0;
offset += 4;
}
}
int[] pBits = new int[1];
int 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);
int[] result = null;
if (i.getTransparencyType() == SWT.TRANSPARENCY_MASK) {
/* Get the HDC for the device */
int hDC = device.internal_new_GC(null);
/* Create the color bitmap */
int hdcSrc = OS.CreateCompatibleDC(hDC);
OS.SelectObject(hdcSrc, hDib);
int hBitmap = OS.CreateCompatibleBitmap(hDC, i.width, i.height);
if (hBitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int 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);
int 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 int[]{hBitmap, hMask};
} else {
/* Create the icon */
ICONINFO info = new ICONINFO();
info.fIcon = true;
info.hbmColor = hBitmap;
info.hbmMask = hMask;
int hIcon = OS.CreateIconIndirect(info);
if (hIcon == 0) SWT.error(SWT.ERROR_NO_HANDLES);
OS.DeleteObject(hBitmap);
OS.DeleteObject(hMask);
image.handle = hIcon;
image.type = SWT.ICON;
if (OS.IsWinCE) image.data = i;
}
} else {
if (image == null) {
result = new int[]{hDib};
} else {
image.handle = hDib;
image.type = SWT.BITMAP;
image.transparentPixel = i.transparentPixel;
if (image.transparentPixel == -1) {
image.alpha = i.alpha;
if (i.alpha == -1 && i.alphaData != null) {
int length = i.alphaData.length;
image.alphaData = new byte[length];
System.arraycopy(i.alphaData, 0, image.alphaData, 0, length);
}
}
}
}
return result;
}
static int[] init(Device device, Image image, 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 init(device, image, imageData);
}
void init(Device device, ImageData i) {
if (i == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
init(device, this, i);
}
/**
* Invokes platform specific functionality to allocate a new GC handle.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>Image</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @param data the platform specific GC data
* @return the platform specific GC handle
*/
public int internal_new_GC (GCData data) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
/*
* Create a new GC that can draw into the image.
* Only supported for bitmaps.
*/
if (type != SWT.BITMAP || memGC != null) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
/* Create a compatible HDC for the device */
int hDC = device.internal_new_GC(null);
int 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.image = this;
data.hFont = device.systemFont;
}
return imageDC;
}
/**
* Invokes platform specific functionality to dispose a GC handle.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>Image</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @param hDC the platform specific GC handle
* @param data the platform specific GC data
*/
public void internal_dispose_GC (int hDC, GCData data) {
OS.DeleteDC(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 using the image.
*
* @return <code>true</code> when the image is disposed and <code>false</code> otherwise
*/
public boolean isDisposed() {
return handle == 0;
}
/**
* Sets the color to which to map the transparent pixel.
* <p>
* There are certain uses of <code>Images</code> that do not support
* transparency (for example, setting an image into a button or label).
* In these cases, it may be desired to simulate transparency by using
* the background color of the widget to paint the transparent pixels
* of the image. This method specifies the color that will be used in
* these cases. For example:
* <pre>
* Button b = new Button();
* image.setBackground(b.getBackground());
* b.setImage(image);
* </pre>
* </p><p>
* The image may be modified by this operation (in effect, the
* transparent regions may be filled with the supplied color). Hence
* this operation is not reversible and it is not legal to call
* this function twice or with a null argument.
* </p><p>
* This method has no effect if the receiver does not have a transparent
* pixel value.
* </p>
*
* @param color the color to use when a transparent pixel is specified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the color is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setBackground(Color color) {
/*
* Note. Not implemented on WinCE.
*/
if (OS.IsWinCE) return;
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;
/* Get the HDC for the device */
int hDC = device.internal_new_GC(null);
/* Change the background color in the image */
BITMAP bm = new BITMAP();
OS.GetObject(handle, BITMAP.sizeof, bm);
int hdcMem = OS.CreateCompatibleDC(hDC);
OS.SelectObject(hdcMem, handle);
int maxColors = 1 << bm.bmBitsPixel;
byte[] colors = new byte[maxColors * 4];
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
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();
if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
OS.SetDIBColorTable(hdcMem, 0, numColors, colors);
OS.DeleteDC(hdcMem);
/* Release the HDC for the device */
device.internal_dispose_GC(hDC, null);
}
/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the receiver
*/
public String toString () {
if (isDisposed()) return "Image {*DISPOSED*}";
return "Image {" + handle + "}";
}
/**
* 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 handle the OS handle for the image
* @return a new image object containing the specified device, type and handle
*/
public static Image win32_new(Device device, int type, int handle) {
if (device == null) device = Device.getDevice();
Image image = new Image();
image.type = type;
image.handle = handle;
image.device = device;
return image;
}
}