Mercurial > projects > dwt2
diff org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/internal/image/FileFormat.d @ 0:6dd524f61e62
add dwt win and basic java stuff
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 02 Mar 2009 14:44:16 +0100 |
parents | |
children | f36c67707cb3 |
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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/FileFormat.d Mon Mar 02 14:44:16 2009 +0100 @@ -0,0 +1,147 @@ +/******************************************************************************* + * Copyright (c) 2000, 2006 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.FileFormat; + +import java.lang.all; + +public import org.eclipse.swt.graphics.ImageLoader; +public import org.eclipse.swt.graphics.ImageData; +public import org.eclipse.swt.internal.image.LEDataInputStream; +public import org.eclipse.swt.internal.image.LEDataOutputStream; + +import org.eclipse.swt.SWT; + +public import java.io.InputStream; +public import java.io.OutputStream; + +import org.eclipse.swt.internal.image.GIFFileFormat; +import org.eclipse.swt.internal.image.WinBMPFileFormat; +import org.eclipse.swt.internal.image.WinICOFileFormat; +import org.eclipse.swt.internal.image.TIFFFileFormat; +import org.eclipse.swt.internal.image.OS2BMPFileFormat; +import org.eclipse.swt.internal.image.JPEGFileFormat; +import org.eclipse.swt.internal.image.PNGFileFormat; + +import tango.core.Exception; +import tango.core.Tuple; + +/** + * Abstract factory class for loading/unloading images from files or streams + * in various image file formats. + * + */ +public abstract class FileFormat { + static const String FORMAT_PACKAGE = "org.eclipse.swt.internal.image"; //$NON-NLS-1$ + static const String FORMAT_SUFFIX = "FileFormat"; //$NON-NLS-1$ + static const String[] FORMATS = [ "WinBMP"[], "WinBMP", "GIF", "WinICO", "JPEG", "PNG", "TIFF", "OS2BMP" ]; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$//$NON-NLS-5$ //$NON-NLS-6$//$NON-NLS-7$//$NON-NLS-8$ + alias Tuple!( WinBMPFileFormat, WinBMPFileFormat, GIFFileFormat, WinICOFileFormat, JPEGFileFormat, PNGFileFormat, TIFFFileFormat, OS2BMPFileFormat ) TFormats; + LEDataInputStream inputStream; + LEDataOutputStream outputStream; + ImageLoader loader; + int compression; + +/** + * Return whether or not the specified input stream + * represents a supported file format. + */ +abstract bool isFileFormat(LEDataInputStream stream); + +abstract ImageData[] loadFromByteStream(); + +/** + * Read the specified input stream, and return the + * device independent image array represented by the stream. + */ +public ImageData[] loadFromStream(LEDataInputStream stream) { + try { + inputStream = stream; + return loadFromByteStream(); + } catch (IOException e) { + SWT.error(SWT.ERROR_IO, e); + return null; + } catch (Exception e) { + SWT.error(SWT.ERROR_INVALID_IMAGE, e); + return null; + } +} + +/** + * Read the specified input stream using the specified loader, and + * return the device independent image array represented by the stream. + */ +public static ImageData[] load(InputStream istr, ImageLoader loader) { + FileFormat fileFormat = null; + LEDataInputStream stream = new LEDataInputStream(istr); + bool isSupported = false; + foreach( TFormat; TFormats ){ + try{ + fileFormat = new TFormat(); + if (fileFormat.isFileFormat(stream)) { + isSupported = true; + break; + } + } catch (Exception e) { + } + } + if (!isSupported) SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT); + fileFormat.loader = loader; + return fileFormat.loadFromStream(stream); +} + +/** + * Write the device independent image array stored in the specified loader + * to the specified output stream using the specified file format. + */ +public static void save(OutputStream os, int format, ImageLoader loader) { + if (format < 0 || format >= FORMATS.length) SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT); + if (FORMATS[format] is null) SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT); + if (loader.data is null || loader.data.length < 1) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + + LEDataOutputStream stream = new LEDataOutputStream(os); + FileFormat fileFormat = null; + try { + foreach( idx, TFormat; TFormats ){ + if( idx is format ){ + fileFormat = new TFormat(); + } + } + } catch (Exception e) { + SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT); + } + if (format is SWT.IMAGE_BMP_RLE) { + switch (loader.data[0].depth) { + case 8: fileFormat.compression = 1; break; + case 4: fileFormat.compression = 2; break; + default: + } + } + fileFormat.unloadIntoStream(loader, stream); +} + +abstract void unloadIntoByteStream(ImageLoader loader); + +/** + * Write the device independent image array stored in the specified loader + * to the specified output stream. + */ +public void unloadIntoStream(ImageLoader loader, LEDataOutputStream stream) { + try { + outputStream = stream; + unloadIntoByteStream(loader); + outputStream.flush(); + } catch (Exception e) { + try {outputStream.flush();} catch (Exception f) {} + SWT.error(SWT.ERROR_IO, e); + } +} +}