144 lines
5.4 KiB
C#
144 lines
5.4 KiB
C#
/*
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Copyright (C) 2010 Volker Berlin (i-net software)
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jeroen Frijters
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jeroen@frijters.net
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*/
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using System;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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namespace ikvm.awt {
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internal class CompositeHelper {
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private readonly ImageAttributes imageAttributes = new ImageAttributes();
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/// <summary>
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/// Create a default CompositeHelper. Is used from Create only.
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/// </summary>
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protected CompositeHelper() {
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}
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internal static CompositeHelper Create(java.awt.Composite comp, Graphics graphics){
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if (comp is java.awt.AlphaComposite) {
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java.awt.AlphaComposite alphaComp = (java.awt.AlphaComposite)comp;
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float alpha = alphaComp.getAlpha();
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switch (alphaComp.getRule()) {
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case java.awt.AlphaComposite.CLEAR:
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graphics.CompositingMode = CompositingMode.SourceCopy;
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return new ClearCompositeHelper();
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case java.awt.AlphaComposite.SRC:
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graphics.CompositingMode = CompositingMode.SourceCopy;
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break;
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case java.awt.AlphaComposite.SRC_OVER:
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graphics.CompositingMode = CompositingMode.SourceOver;
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break;
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case java.awt.AlphaComposite.DST:
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graphics.CompositingMode = CompositingMode.SourceOver;
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alpha = 0.0F;
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break;
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default:
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graphics.CompositingMode = CompositingMode.SourceOver;
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Console.Error.WriteLine("AlphaComposite with Rule " + alphaComp.getRule() + " not supported.");
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break;
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}
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if (alpha == 1.0) {
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return new CompositeHelper();
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} else {
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return new AlphaCompositeHelper(alpha);
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}
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} else {
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graphics.CompositingMode = CompositingMode.SourceOver;
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Console.Error.WriteLine("Composite not supported: " + comp.GetType().FullName);
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return new CompositeHelper();
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}
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}
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internal virtual int GetArgb(java.awt.Color color) {
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return color.getRGB();
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}
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internal virtual Color GetColor( java.awt.Color color ){
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return color == null ? Color.Empty : Color.FromArgb(GetArgb(color));
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}
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internal virtual int ToArgb(Color color) {
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return color.ToArgb();
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}
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internal virtual java.awt.Color GetColor(Color color) {
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return color == Color.Empty ? null : new java.awt.Color(ToArgb(color), true);
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}
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/// <summary>
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/// Get the ImageAttributes instance. Does not change it bcause it is not a copy.
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/// </summary>
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/// <returns></returns>
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internal virtual ImageAttributes GetImageAttributes(){
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return imageAttributes;
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}
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}
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internal sealed class AlphaCompositeHelper : CompositeHelper {
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private readonly float alpha;
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/// <summary>
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/// Create a AlphaCompositeHelper
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/// </summary>
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/// <param name="alpha">a value in the range from 0.0 to 1.0</param>
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internal AlphaCompositeHelper(float alpha) {
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this.alpha = alpha;
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ColorMatrix matrix = new ColorMatrix();
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matrix.Matrix33 = alpha;
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GetImageAttributes().SetColorMatrix(matrix);
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}
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internal override int GetArgb(java.awt.Color color) {
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uint argb = (uint)color.getRGB();
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uint newAlpha = (uint)((0xff000000 & argb) * alpha + 0x800000);
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uint newArgb = (0xff000000 & newAlpha) | (0xffffff & argb);
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return (int)newArgb;
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}
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internal override int ToArgb(Color color) {
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uint argb = (uint)color.ToArgb();
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uint newAlpha = (uint)((0xff000000 & argb) / alpha + 0x800000);
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uint newArgb = (0xff000000 & newAlpha) | (0xffffff & argb);
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return (int)newArgb;
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}
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}
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internal sealed class ClearCompositeHelper : CompositeHelper {
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internal ClearCompositeHelper()
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{
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ColorMatrix matrix = new ColorMatrix();
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matrix.Matrix00 = matrix.Matrix11 = matrix.Matrix22 = matrix.Matrix33 = 0.0F;
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GetImageAttributes().SetColorMatrix(matrix);
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}
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internal override int GetArgb(java.awt.Color color) {
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return 0;
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}
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}
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}
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