--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/internal/image/WinICOFileFormat.d	Sun Jan 06 22:54:14 2008 +0100
@@ -0,0 +1,327 @@
+/*******************************************************************************
+ * 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
+ *******************************************************************************/
+module dwt.internal.image.WinICOFileFormat;
+
+public import dwt.internal.image.FileFormat;
+public import dwt.graphics.PaletteData;
+import dwt.internal.image.WinBMPFileFormat;
+import dwt.SWT;
+
+import tango.core.Exception;
+
+final class WinICOFileFormat : FileFormat {
+
+byte[] bitInvertData(byte[] data, int startIndex, int endIndex) {
+	// Destructively bit invert data in the given byte array.
+	for (int i = startIndex; i < endIndex; i++) {
+		data[i] = cast(byte)(255 - data[i - startIndex]);
+	}
+	return data;
+}
+
+static final byte[] convertPad(byte[] data, int width, int height, int depth, int pad, int newPad) {
+	if (pad == newPad) return data;
+	int stride = (width * depth + 7) / 8;
+	int bpl = (stride + (pad - 1)) / pad * pad;
+	int newBpl = (stride + (newPad - 1)) / newPad * newPad;
+	byte[] newData = new byte[height * newBpl];
+	int srcIndex = 0, destIndex = 0;
+	for (int y = 0; y < height; y++) {
+        newData[ destIndex .. destIndex+newBpl ] = data[ srcIndex .. srcIndex+newBpl ];
+		srcIndex += bpl;
+		destIndex += newBpl;
+	}
+	return newData;
+}
+/**
+ * Answer the size in bytes of the file representation of the given
+ * icon
+ */
+int iconSize(ImageData i) {
+	int shapeDataStride = (i.width * i.depth + 31) / 32 * 4;
+	int maskDataStride = (i.width + 31) / 32 * 4;
+	int dataSize = (shapeDataStride + maskDataStride) * i.height;
+	int paletteSize = i.palette.colors != null ? i.palette.colors.length * 4 : 0;
+	return WinBMPFileFormat.BMPHeaderFixedSize + paletteSize + dataSize;
+}
+bool isFileFormat(LEDataInputStream stream) {
+	try {
+		byte[] header = new byte[4];
+		stream.read(header);
+		stream.unread(header);
+		return header[0] == 0 && header[1] == 0 && header[2] == 1 && header[3] == 0;
+	} catch (Exception e) {
+		return false;
+	}
+}
+bool isValidIcon(ImageData i) {
+	switch (i.depth) {
+		case 1:
+		case 4:
+		case 8:
+			if (i.palette.isDirect) return false;
+			int size = i.palette.colors.length;
+			return size == 2 || size == 16 || size == 32 || size == 256;
+		case 24:
+		case 32:
+			return i.palette.isDirect;
+	}
+	return false;
+}
+int loadFileHeader(LEDataInputStream byteStream) {
+	int[] fileHeader = new int[3];
+	try {
+		fileHeader[0] = byteStream.readShort();
+		fileHeader[1] = byteStream.readShort();
+		fileHeader[2] = byteStream.readShort();
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+	if ((fileHeader[0] != 0) || (fileHeader[1] != 1))
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	int numIcons = fileHeader[2];
+	if (numIcons <= 0)
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	return numIcons;
+}
+int loadFileHeader(LEDataInputStream byteStream, bool hasHeader) {
+	int[] fileHeader = new int[3];
+	try {
+		if (hasHeader) {
+			fileHeader[0] = byteStream.readShort();
+			fileHeader[1] = byteStream.readShort();
+		} else {
+			fileHeader[0] = 0;
+			fileHeader[1] = 1;
+		}
+		fileHeader[2] = byteStream.readShort();
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+	if ((fileHeader[0] != 0) || (fileHeader[1] != 1))
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	int numIcons = fileHeader[2];
+	if (numIcons <= 0)
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	return numIcons;
+}
+ImageData[] loadFromByteStream() {
+	int numIcons = loadFileHeader(inputStream);
+	int[][] headers = loadIconHeaders(numIcons);
+	ImageData[] icons = new ImageData[headers.length];
+	for (int i = 0; i < icons.length; i++) {
+		icons[i] = loadIcon(headers[i]);
+	}
+	return icons;
+}
+/**
+ * Load one icon from the byte stream.
+ */
+ImageData loadIcon(int[] iconHeader) {
+	byte[] infoHeader = loadInfoHeader(iconHeader);
+	WinBMPFileFormat bmpFormat = new WinBMPFileFormat();
+	bmpFormat.inputStream = inputStream;
+	PaletteData palette = bmpFormat.loadPalette(infoHeader);
+	byte[] shapeData = bmpFormat.loadData(infoHeader);
+	int width = (infoHeader[4] & 0xFF) | ((infoHeader[5] & 0xFF) << 8) | ((infoHeader[6] & 0xFF) << 16) | ((infoHeader[7] & 0xFF) << 24);
+	int height = (infoHeader[8] & 0xFF) | ((infoHeader[9] & 0xFF) << 8) | ((infoHeader[10] & 0xFF) << 16) | ((infoHeader[11] & 0xFF) << 24);
+	if (height < 0) height = -height;
+	int depth = (infoHeader[14] & 0xFF) | ((infoHeader[15] & 0xFF) << 8);
+	infoHeader[14] = 1;
+	infoHeader[15] = 0;
+	byte[] maskData = bmpFormat.loadData(infoHeader);
+	maskData = convertPad(maskData, width, height, 1, 4, 2);
+	bitInvertData(maskData, 0, maskData.length);
+	return ImageData.internal_new(
+		width,
+		height,
+		depth,
+		palette,
+		4,
+		shapeData,
+		2,
+		maskData,
+		null,
+		-1,
+		-1,
+		SWT.IMAGE_ICO,
+		0,
+		0,
+		0,
+		0);
+}
+int[][] loadIconHeaders(int numIcons) {
+	int[][] headers = new int[][]( numIcons, 7 );
+	try {
+		for (int i = 0; i < numIcons; i++) {
+			headers[i][0] = inputStream.read();
+			headers[i][1] = inputStream.read();
+			headers[i][2] = inputStream.readShort();
+			headers[i][3] = inputStream.readShort();
+			headers[i][4] = inputStream.readShort();
+			headers[i][5] = inputStream.readInt();
+			headers[i][6] = inputStream.readInt();
+		}
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+	return headers;
+}
+byte[] loadInfoHeader(int[] iconHeader) {
+	int width = iconHeader[0];
+	int height = iconHeader[1];
+	int numColors = iconHeader[2]; // the number of colors is in the low byte, but the high byte must be 0
+	if (numColors == 0) numColors = 256; // this is specified: '00' represents '256' (0x100) colors
+	if ((numColors != 2) && (numColors != 8) && (numColors != 16) &&
+		(numColors != 32) && (numColors != 256))
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	if (inputStream.getPosition() < iconHeader[6]) {
+		// Seek to the specified offset
+		try {
+			inputStream.skip(iconHeader[6] - inputStream.getPosition());
+		} catch (IOException e) {
+			SWT.error(SWT.ERROR_IO, e);
+			return null;
+		}
+	}
+	byte[] infoHeader = new byte[WinBMPFileFormat.BMPHeaderFixedSize];
+	try {
+		inputStream.read(infoHeader);
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+	if (((infoHeader[12] & 0xFF) | ((infoHeader[13] & 0xFF) << 8)) != 1)
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	int infoWidth = (infoHeader[4] & 0xFF) | ((infoHeader[5] & 0xFF) << 8) | ((infoHeader[6] & 0xFF) << 16) | ((infoHeader[7] & 0xFF) << 24);
+	int infoHeight = (infoHeader[8] & 0xFF) | ((infoHeader[9] & 0xFF) << 8) | ((infoHeader[10] & 0xFF) << 16) | ((infoHeader[11] & 0xFF) << 24);
+	int bitCount = (infoHeader[14] & 0xFF) | ((infoHeader[15] & 0xFF) << 8);
+	if (height == infoHeight && bitCount == 1) height /= 2;
+	if (!((width == infoWidth) && (height * 2 == infoHeight) &&
+		(bitCount == 1 || bitCount == 4 || bitCount == 8 || bitCount == 24 || bitCount == 32)))
+			SWT.error(SWT.ERROR_INVALID_IMAGE);
+	infoHeader[8] = cast(byte)(height & 0xFF);
+	infoHeader[9] = cast(byte)((height >> 8) & 0xFF);
+	infoHeader[10] = cast(byte)((height >> 16) & 0xFF);
+	infoHeader[11] = cast(byte)((height >> 24) & 0xFF);
+	return infoHeader;
+}
+/**
+ * Unload a single icon
+ */
+void unloadIcon(ImageData icon) {
+	int sizeImage = (((icon.width * icon.depth + 31) / 32 * 4) +
+		((icon.width + 31) / 32 * 4)) * icon.height;
+	try {
+		outputStream.writeInt(WinBMPFileFormat.BMPHeaderFixedSize);
+		outputStream.writeInt(icon.width);
+		outputStream.writeInt(icon.height * 2);
+		outputStream.writeShort(1);
+		outputStream.writeShort(cast(short)icon.depth);
+		outputStream.writeInt(0);
+		outputStream.writeInt(sizeImage);
+		outputStream.writeInt(0);
+		outputStream.writeInt(0);
+		outputStream.writeInt(icon.palette.colors != null ? icon.palette.colors.length : 0);
+		outputStream.writeInt(0);
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+
+	byte[] rgbs = WinBMPFileFormat.paletteToBytes(icon.palette);
+	try {
+		outputStream.write(rgbs);
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+	unloadShapeData(icon);
+	unloadMaskData(icon);
+}
+/**
+ * Unload the icon header for the given icon, calculating the offset.
+ */
+void unloadIconHeader(ImageData i) {
+	int headerSize = 16;
+	int offset = headerSize + 6;
+	int iconSize = iconSize(i);
+	try {
+		outputStream.write(i.width);
+		outputStream.write(i.height);
+		outputStream.writeShort(i.palette.colors != null ? i.palette.colors.length : 0);
+		outputStream.writeShort(0);
+		outputStream.writeShort(0);
+		outputStream.writeInt(iconSize);
+		outputStream.writeInt(offset);
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+}
+void unloadIntoByteStream(ImageLoader loader) {
+	/* We do not currently support writing multi-image ico,
+	 * so we use the first image data in the loader's array. */
+	ImageData image = loader.data[0];
+	if (!isValidIcon(image))
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	try {
+		outputStream.writeShort(0);
+		outputStream.writeShort(1);
+		outputStream.writeShort(1);
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+	unloadIconHeader(image);
+	unloadIcon(image);
+}
+/**
+ * Unload the mask data for an icon. The data is flipped vertically
+ * and inverted.
+ */
+void unloadMaskData(ImageData icon) {
+	ImageData mask = icon.getTransparencyMask();
+	int bpl = (icon.width + 7) / 8;
+	int pad = mask.scanlinePad;
+	int srcBpl = (bpl + pad - 1) / pad * pad;
+	int destBpl = (bpl + 3) / 4 * 4;
+	byte[] buf = new byte[destBpl];
+	int offset = (icon.height - 1) * srcBpl;
+	byte[] data = mask.data;
+	try {
+		for (int i = 0; i < icon.height; i++) {
+            buf[ 0 .. bpl ] = data[ offset .. offset+bpl ];
+			bitInvertData(buf, 0, bpl);
+			outputStream.write(buf, 0, destBpl);
+			offset -= srcBpl;
+		}
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+}
+/**
+ * Unload the shape data for an icon. The data is flipped vertically.
+ */
+void unloadShapeData(ImageData icon) {
+	int bpl = (icon.width * icon.depth + 7) / 8;
+	int pad = icon.scanlinePad;
+	int srcBpl = (bpl + pad - 1) / pad * pad;
+	int destBpl = (bpl + 3) / 4 * 4;
+	byte[] buf = new byte[destBpl];
+	int offset = (icon.height - 1) * srcBpl;
+	byte[] data = icon.data;
+	try {
+		for (int i = 0; i < icon.height; i++) {
+            buf[ 0 .. bpl ] = data[ offset .. offset+bpl ];
+			outputStream.write(buf, 0, destBpl);
+			offset -= srcBpl;
+		}
+	} catch (IOException e) {
+		SWT.error(SWT.ERROR_IO, e);
+	}
+}
+}