Examples with ImageData org.eclipse.swt.graphics.ImageData used on opensource projects

Example 1 with ImageData

use of org.eclipse.swt.graphics.ImageData in project cogtool by cogtool.

the class WindowsImageTransfer method nativeToJava.

protected Object nativeToJava(TransferData transferData) {
    final Object o = super.nativeToJava(transferData);
    final byte[] bytes = (byte[]) o;
    try {
        final InputStream bis = new PrependWinBMPHeaderFilterInputStream(new UncompressDibFilterInputStream(new ByteArrayInputStream(bytes)));
        final ImageData[] data = new ImageLoader().load(bis);
        if (data.length < 1) {
            return null;
        }
        return data[0];
    } catch (IOException e) {
        return null;
    }
}

Example 2 with ImageData

use of org.eclipse.swt.graphics.ImageData in project cogtool by cogtool.

the class WindowsImageTransfer method javaToNative.

protected void javaToNative(Object object, TransferData transferData) {
    final ImageData imgData = (ImageData) object;
    final ImageLoader loader = new ImageLoader();
    final ByteArrayOutputStream bos = new ByteArrayOutputStream();
    final byte[] bytes;
    loader.data = new ImageData[] { imgData };
    loader.save(new RemoveWinBMPHeaderFilterOutputStream(bos), SWT.IMAGE_BMP);
    bytes = bos.toByteArray();
    super.javaToNative(bytes, transferData);
}

Example 3 with ImageData

use of org.eclipse.swt.graphics.ImageData in project cogtool by cogtool.

the class GraphicalWidgetBase method regenerateCaches.

protected void regenerateCaches(final int width, final int height) {
    // For performance reasons, we defer regeneration until we exit fast mode
    if (!this.fast) {
        if (View.isDrawingOK()) {
            // Recompute the cached data in the background
            //            new Thread () {
            //                public void run() {
            boolean needsRepaint = false;
            // Recompute the midground cache if it is dirty
            if (cachedMidgroundDirty) {
                needsRepaint = true;
                if ((width == 0) || (height == 0)) {
                    throw new IllegalArgumentException("Width or Height on a widget is 0. This " + "should have been prevented in setShape " + "Size");
                }
                // Create a temporary canvas on which to draw the midground
                Image img = new Image(null, width, height);
                GC gc = new GC(img);
                SWTGraphics g = new SWTGraphics(gc);
                g.setAntialias(SWT.OFF);
                // Use the renderer & clipper to paint the midground nicely
                g.setBackgroundColor(getSelectionColor());
                renderer.paintMidground(g);
                //      value.
                if (OSUtils.WINDOWS) {
                    ImageData id = img.getImageData();
                    id.alpha = displayAlpha.determineAlpha(false);
                    img.dispose();
                    img = new Image(null, id);
                }
                // WARNING: this might dispose img, or it might return it
                // DO NOT DISPOSE img!
                Image newFG = clipper.clip(img);
                // Clean the cache
                cachedMidgroundDirty = false;
                cachedMidground.dispose();
                cachedMidground = newFG;
                //                            cachedMidgroundData = newFG.getImageData();
                // Dispose of temporary resources
                //                            newFG.dispose();
                g.dispose();
                gc.dispose();
            }
            // Recompute the background cache if it is dirty
            if (cachedBackgroundDirty) {
                needsRepaint = true;
                Image newBG = null;
                // Check if background is present
                byte[] bgImageData = model.getImage();
                if (bgImageData != null) {
                    ImageData bg = new ImageData(new ByteArrayInputStream(bgImageData));
                    newBG = clipper.clip(new Image(null, bg.scaledTo(width, height)));
                }
                // Clean the cache
                cachedBackgroundDirty = false;
                if (cachedBackground != null) {
                    cachedBackground.dispose();
                }
                cachedBackground = newBG;
            }
            // Make sure the results of our update are shown
            if (needsRepaint && View.isDrawingOK()) {
                //                        WindowUtil.globalDisplay.syncExec(
                //                            new Runnable() {
                //                                public void run() {
                repaint();
            //                                 }
            //                            }
            //                        );
            }
        //                }
        //            }.start();
        }
    }
}

Example 4 with ImageData

use of org.eclipse.swt.graphics.ImageData in project cogtool by cogtool.

the class GraphicalWidgetBase method updateImage.

public synchronized void updateImage() {
    // Mark the caches as dirty so that no one will use them
    synchronized (this.flagLock) {
        this.cachedBackgroundDirty = true;
    }
    // Confirm that the image is readable (throws an exception if it is not)
    if (model.getImage() != null) {
        new ImageData(new ByteArrayInputStream(model.getImage()));
    }
    this.renderer.updateData();
    regenerateCaches();
}

Example 5 with ImageData

use of org.eclipse.swt.graphics.ImageData in project cogtool by cogtool.

the class WindowUtil method getOpenHandCursor.

/**
     * Returns a hand cursor.
     *
     * IMPORTANT: this cursor must be disposed when its creator is disposed,
     *            or we will have a memory link.
     *
     * @return a hew hand cursor
     */
public static Cursor getOpenHandCursor() {
    if (OPEN_HAND_CURSOR == null) {
        ImageData curData = GraphicsUtil.getImageDataFromResource("edu/cmu/cs/hcii/cogtool/resources/open_hand.gif");
        if (curData == null) {
            return null;
        }
        OPEN_HAND_CURSOR = new Cursor(GLOBAL_DISPLAY, curData, 8, 8);
    }
    return OPEN_HAND_CURSOR;
}