diff org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/internal/image/TIFFFileFormat.d @ 0:6dd524f61e62

add dwt win and basic java stuff
author Frank Benoit <benoit@tionex.de>
date Mon, 02 Mar 2009 14:44:16 +0100
parents
children 6bf2837c50fe
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/internal/image/TIFFFileFormat.d	Mon Mar 02 14:44:16 2009 +0100
@@ -0,0 +1,85 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.swt.internal.image.TIFFFileFormat;
+
+import org.eclipse.swt.internal.image.TIFFRandomFileAccess;
+import org.eclipse.swt.internal.image.TIFFDirectory;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.ImageLoader;
+import org.eclipse.swt.internal.image.FileFormat;
+
+import tango.core.Exception;
+
+/**
+ * Baseline TIFF decoder revision 6.0
+ * Extension T4-encoding CCITT T.4 1D
+ */
+final class TIFFFileFormat : FileFormat {
+
+override bool isFileFormat(LEDataInputStream stream) {
+    try {
+        byte[] header = new byte[4];
+        stream.read(header);
+        stream.unread(header);
+        if (header[0] !is header[1]) return false;
+        if (!(header[0] is 0x49 && header[2] is 42 && header[3] is 0) &&
+            !(header[0] is 0x4d && header[2] is 0 && header[3] is 42)) {
+            return false;
+        }
+        return true;
+    } catch (Exception e) {
+        return false;
+    }
+}
+
+override ImageData[] loadFromByteStream() {
+    byte[] header = new byte[8];
+    bool isLittleEndian;
+    ImageData[] images = new ImageData[0];
+    TIFFRandomFileAccess file = new TIFFRandomFileAccess(inputStream);
+    try {
+        file.read(header);
+        if (header[0] !is header[1]) SWT.error(SWT.ERROR_INVALID_IMAGE);
+        if (!(header[0] is 0x49 && header[2] is 42 && header[3] is 0) &&
+            !(header[0] is 0x4d && header[2] is 0 && header[3] is 42)) {
+            SWT.error(SWT.ERROR_INVALID_IMAGE);
+        }
+        isLittleEndian = header[0] is 0x49;
+        int offset = isLittleEndian ?
+            (header[4] & 0xFF) | ((header[5] & 0xFF) << 8) | ((header[6] & 0xFF) << 16) | ((header[7] & 0xFF) << 24) :
+            (header[7] & 0xFF) | ((header[6] & 0xFF) << 8) | ((header[5] & 0xFF) << 16) | ((header[4] & 0xFF) << 24);
+        file.seek(offset);
+        TIFFDirectory directory = new TIFFDirectory(file, isLittleEndian, loader);
+        ImageData image = directory.read();
+        /* A baseline reader is only expected to read the first directory */
+        images = [image];
+    } catch (IOException e) {
+        SWT.error(SWT.ERROR_IO, e);
+    }
+    return images;
+}
+
+override void unloadIntoByteStream(ImageLoader loader) {
+    /* We do not currently support writing multi-page tiff,
+     * so we use the first image data in the loader's array. */
+    ImageData image = loader.data[0];
+    TIFFDirectory directory = new TIFFDirectory(image);
+    try {
+        directory.writeToStream(outputStream);
+    } catch (IOException e) {
+        SWT.error(SWT.ERROR_IO, e);
+    }
+}
+
+}