--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/graphics/Pattern.d	Sun Jan 27 23:17:22 2008 +0100
@@ -0,0 +1,272 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 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.graphics.Pattern;
+
+import dwt.internal.win32.OS;
+import dwt.internal.gdip.Gdip;
+//PORTING_TYPE
+class Pattern{
+    Gdip.Brush* handle;
+    bool isDisposed();
+}
+
+/++
+import dwt.DWT;
+import dwt.DWTError;
+import dwt.DWTException;
+import dwt.internal.gdip.Gdip;
+import dwt.internal.gdip.PointF;
+import dwt.internal.win32.OS;
+
+/**
+ * Instances of this class represent patterns to use while drawing. Patterns
+ * can be specified either as bitmaps or gradients.
+ * <p>
+ * Application code must explicitly invoke the <code>Pattern.dispose()</code>
+ * method to release the operating system resources managed by each instance
+ * when those instances are no longer required.
+ * </p>
+ * <p>
+ * This class requires the operating system's advanced graphics subsystem
+ * which may not be available on some platforms.
+ * </p>
+ *
+ * @since 3.1
+ */
+public class Pattern extends Resource {
+
+    /**
+     * the OS resource for the Pattern
+     * (Warning: This field is platform dependent)
+     * <p>
+     * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT
+     * public API. It is marked public only so that it can be shared
+     * within the packages provided by DWT. It is not available on all
+     * platforms and should never be accessed from application code.
+     * </p>
+     */
+    public int handle;
+
+/**
+ * Constructs a new Pattern given an image. Drawing with the resulting
+ * pattern will cause the image to be tiled over the resulting area.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param device the device on which to allocate the pattern
+ * @param image the image that the pattern will draw
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device, or the image is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ * @exception DWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle for the pattern could not be obtained</li>
+ * </ul>
+ *
+ * @see #dispose()
+ */
+public Pattern(Device device, Image image) {
+    if (device is null) device = Device.getDevice();
+    if (device is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (image is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (image.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    this.device = device;
+    device.checkGDIP();
+    int[] gdipImage = image.createGdipImage();
+    int img = gdipImage[0];
+    int width = Gdip.Image_GetWidth(img);
+    int height = Gdip.Image_GetHeight(img);
+    handle = Gdip.TextureBrush_new(img, Gdip.WrapModeTile, 0, 0, width, height);
+    Gdip.Bitmap_delete(img);
+    if (gdipImage[1] !is 0) {
+        int hHeap = OS.GetProcessHeap ();
+        OS.HeapFree(hHeap, 0, gdipImage[1]);
+    }
+    if (handle is 0) DWT.error(DWT.ERROR_NO_HANDLES);
+    if (device.tracking) device.new_Object(this);
+}
+
+/**
+ * Constructs a new Pattern that represents a linear, two color
+ * gradient. Drawing with the pattern will cause the resulting area to be
+ * tiled with the gradient specified by the arguments.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param device the device on which to allocate the pattern
+ * @param x1 the x coordinate of the starting corner of the gradient
+ * @param y1 the y coordinate of the starting corner of the gradient
+ * @param x2 the x coordinate of the ending corner of the gradient
+ * @param y2 the y coordinate of the ending corner of the gradient
+ * @param color1 the starting color of the gradient
+ * @param color2 the ending color of the gradient
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device,
+ *                              or if either color1 or color2 is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if either color1 or color2 has been disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ * @exception DWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle for the pattern could not be obtained</li>
+ * </ul>
+ *
+ * @see #dispose()
+ */
+public Pattern(Device device, float x1, float y1, float x2, float y2, Color color1, Color color2) {
+    this(device, x1, y1, x2, y2, color1, 0xFF, color2, 0xFF);
+}
+
+/**
+ * Constructs a new Pattern that represents a linear, two color
+ * gradient. Drawing with the pattern will cause the resulting area to be
+ * tiled with the gradient specified by the arguments.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param device the device on which to allocate the pattern
+ * @param x1 the x coordinate of the starting corner of the gradient
+ * @param y1 the y coordinate of the starting corner of the gradient
+ * @param x2 the x coordinate of the ending corner of the gradient
+ * @param y2 the y coordinate of the ending corner of the gradient
+ * @param color1 the starting color of the gradient
+ * @param alpha1 the starting alpha value of the gradient
+ * @param color2 the ending color of the gradient
+ * @param alpha2 the ending alpha value of the gradient
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device,
+ *                              or if either color1 or color2 is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if either color1 or color2 has been disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ * @exception DWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle for the pattern could not be obtained</li>
+ * </ul>
+ *
+ * @see #dispose()
+ *
+ * @since 3.2
+ */
+public Pattern(Device device, float x1, float y1, float x2, float y2, Color color1, int alpha1, Color color2, int alpha2) {
+    if (device is null) device = Device.getDevice();
+    if (device is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (color1 is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (color1.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    if (color2 is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    if (color2.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+    this.device = device;
+    device.checkGDIP();
+    int colorRef1 = color1.handle;
+    int rgb = ((colorRef1 >> 16) & 0xFF) | (colorRef1 & 0xFF00) | ((colorRef1 & 0xFF) << 16);
+    int foreColor = Gdip.Color_new((alpha1 & 0xFF) << 24 | rgb);
+    if (x1 is x2 && y1 is y2) {
+        handle = Gdip.SolidBrush_new(foreColor);
+        if (handle is 0) DWT.error(DWT.ERROR_NO_HANDLES);
+    } else {
+        int colorRef2 = color2.handle;
+        rgb = ((colorRef2 >> 16) & 0xFF) | (colorRef2 & 0xFF00) | ((colorRef2 & 0xFF) << 16);
+        int backColor = Gdip.Color_new((alpha2 & 0xFF) << 24 | rgb);
+        PointF p1 = new PointF();
+        p1.X = x1;
+        p1.Y = y1;
+        PointF p2 = new PointF();
+        p2.X = x2;
+        p2.Y = y2;
+        handle = Gdip.LinearGradientBrush_new(p1, p2, foreColor, backColor);
+        if (handle is 0) DWT.error(DWT.ERROR_NO_HANDLES);
+        if (alpha1 !is 0xFF || alpha2 !is 0xFF) {
+            int a = (int)((alpha1 & 0xFF) * 0.5f + (alpha2 & 0xFF) * 0.5f);
+            int r = (int)(((colorRef1 & 0xFF) >> 0) * 0.5f + ((colorRef2 & 0xFF) >> 0) * 0.5f);
+            int g = (int)(((colorRef1 & 0xFF00) >> 8) * 0.5f + ((colorRef2 & 0xFF00) >> 8) * 0.5f);
+            int b = (int)(((colorRef1 & 0xFF0000) >> 16) * 0.5f + ((colorRef2 & 0xFF0000) >> 16) * 0.5f);
+            int midColor = Gdip.Color_new(a << 24 | r << 16 | g << 8 | b);
+            Gdip.LinearGradientBrush_SetInterpolationColors(handle, new int[]{foreColor, midColor, backColor}, new float[]{0, 0.5f, 1}, 3);
+            Gdip.Color_delete(midColor);
+        }
+        Gdip.Color_delete(backColor);
+    }
+    Gdip.Color_delete(foreColor);
+    if (device.tracking) device.new_Object(this);
+}
+
+/**
+ * Disposes of the operating system resources associated with
+ * the Pattern. Applications must dispose of all Patterns that
+ * they allocate.
+ */
+public void dispose() {
+    if (handle is 0) return;
+    if (device.isDisposed()) return;
+    int type = Gdip.Brush_GetType(handle);
+    switch (type) {
+        case Gdip.BrushTypeSolidColor:
+            Gdip.SolidBrush_delete(handle);
+            break;
+        case Gdip.BrushTypeHatchFill:
+            Gdip.HatchBrush_delete(handle);
+            break;
+        case Gdip.BrushTypeLinearGradient:
+            Gdip.LinearGradientBrush_delete(handle);
+            break;
+        case Gdip.BrushTypeTextureFill:
+            Gdip.TextureBrush_delete(handle);
+            break;
+    }
+    handle = 0;
+    if (device.tracking) device.dispose_Object(this);
+    device = null;
+}
+
+/**
+ * Returns <code>true</code> if the Pattern has been disposed,
+ * and <code>false</code> otherwise.
+ * <p>
+ * This method gets the dispose state for the Pattern.
+ * When a Pattern has been disposed, it is an error to
+ * invoke any other method using the Pattern.
+ *
+ * @return <code>true</code> when the Pattern is disposed, and <code>false</code> otherwise
+ */
+public bool isDisposed() {
+    return handle is 0;
+}
+
+/**
+ * Returns a string containing a concise, human-readable
+ * description of the receiver.
+ *
+ * @return a string representation of the receiver
+ */
+public String toString() {
+    if (isDisposed()) return "Pattern {*DISPOSED*}";
+    return "Pattern {" + handle + "}";
+}
+
+}
+++/
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