X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.utils.ui%2Fsrc%2Forg%2Fsimantics%2Futils%2Fui%2Fgfx%2Frasterize%2FLazyRasterizer.java;fp=bundles%2Forg.simantics.utils.ui%2Fsrc%2Forg%2Fsimantics%2Futils%2Fui%2Fgfx%2Frasterize%2FLazyRasterizer.java;h=a4129e2d878fd04750325a6c64248df99a4fbe22;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/rasterize/LazyRasterizer.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/rasterize/LazyRasterizer.java
new file mode 100644
index 000000000..a4129e2d8
--- /dev/null
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/rasterize/LazyRasterizer.java
@@ -0,0 +1,152 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+/*
+ * 25.1.2007
+ */
+package org.simantics.utils.ui.gfx.rasterize;
+
+import java.util.LinkedList;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.jobs.Job;
+import org.eclipse.swt.graphics.ImageData;
+
+/**
+ * LazyRasterizer
+ * 
+ * @author Toni Kalajainen
+ */
+public class LazyRasterizer {
+
+    public static void addJob(RasterJob job) {
+        getJob().addJob(job);
+    }
+
+    public static void addAsFirstJob(RasterJob job) {
+        getJob().addAsFirstJob(job);
+    }
+
+    public static void removeJob(RasterJob job) {
+        getJob().removeJob(job);
+    }
+
+    static RasterizeJob job;
+
+    synchronized static RasterizeJob getJob() {
+        if (job == null)
+            job = new RasterizeJob();
+        return job;
+    }
+
+    static class RasterizeJob extends Job {
+        LinkedList<RasterJob> queue = new LinkedList<RasterJob>();
+
+        @SuppressWarnings("unused")
+        private boolean isRunning;
+
+        public RasterizeJob() {
+            super("Rasterize Job");
+        }
+
+        @Override
+        protected IStatus run(IProgressMonitor monitor) {
+            //System.out.println(Thread.currentThread());
+            setThread(Thread.currentThread());
+            int taskLeft = 10000;
+            isRunning = true;
+            monitor.beginTask("Rasterizing", taskLeft);
+            try {
+                // 1. Pick a job
+                RasterJob job = pullNextJob();
+                do {
+                    // 2. Check if canceled
+                    if (monitor.isCanceled()) {
+                        cancel();
+                        return Status.CANCEL_STATUS;
+                    }
+                    // 3. rasterize
+                    if (job != null) {
+                        try {
+                            monitor.subTask(job.raster.toString());
+                            ImageData id = job.raster.rasterize(job.width, job.height);
+                            job.listener.rasterizationComplete(job, id);
+                        } catch (Exception e) {
+                            job.listener.rasterizationFailed(job, e);
+                        }
+
+                        int jobsLeft = jobsLeft();
+                        double workLeft;
+                        if (jobsLeft == 0) {
+                            workLeft = taskLeft;
+                        } else {
+                            workLeft = ((double) taskLeft) / ((double) jobsLeft());
+                        }
+                        int worked = (int) workLeft;
+                        monitor.worked(worked);
+                        taskLeft -= worked;
+                    }
+                    monitor.subTask("");
+                    // 4. Pick next job
+                    job = pullNextJob();
+                } while (job != null);
+                isRunning = false;
+
+            } finally {
+                monitor.done();
+            }
+            return Status.OK_STATUS;
+        }
+
+        protected synchronized int jobsLeft() {
+            return queue.size();
+        }
+
+        protected synchronized RasterJob pullNextJob() {
+            if (queue.isEmpty())
+                return null;
+            return queue.removeFirst();
+        }
+
+        public synchronized void clear() {
+            RasterJob jobs[] = queue.toArray(new RasterJob[0]);
+            for (RasterJob j : jobs)
+                removeJob(j);
+        }
+
+        public synchronized void addJob(RasterJob job) {            
+            queue.addLast(job);
+            job.status = RasterJobStatus.QUEUED;
+            //if (!isRunning && queue.size()==1)
+                schedule();
+        }
+
+        public synchronized void addAsFirstJob(RasterJob job) {            
+            queue.addFirst(job);
+            job.status = RasterJobStatus.QUEUED;
+            //if (!isRunning && queue.size()==1)
+                schedule();
+        }
+        
+        public synchronized boolean removeJob(RasterJob job) {
+            if (queue.remove(job)) {
+                job.status = RasterJobStatus.COMPLETE;
+                job.listener.rasterizationCanceled(job);
+                return true;
+            }
+            return false;
+        }
+
+    }
+
+}