001/* 002 * SVG Salamander 003 * Copyright (c) 2004, Mark McKay 004 * All rights reserved. 005 * 006 * Redistribution and use in source and binary forms, with or 007 * without modification, are permitted provided that the following 008 * conditions are met: 009 * 010 * - Redistributions of source code must retain the above 011 * copyright notice, this list of conditions and the following 012 * disclaimer. 013 * - Redistributions in binary form must reproduce the above 014 * copyright notice, this list of conditions and the following 015 * disclaimer in the documentation and/or other materials 016 * provided with the distribution. 017 * 018 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 019 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 020 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 021 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 022 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 023 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 025 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 026 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 027 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 029 * OF THE POSSIBILITY OF SUCH DAMAGE. 030 * 031 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other 032 * projects can be found at http://www.kitfox.com 033 * 034 * Created on April 1, 2004, 6:41 AM 035 */ 036 037package com.kitfox.svg.composite; 038 039import java.awt.*; 040import java.awt.image.*; 041 042/** 043 * @author Mark McKay 044 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a> 045 */ 046public class AdobeCompositeContext implements CompositeContext 047{ 048 final int compositeType; 049 final float extraAlpha; 050 051 float[] rgba_src = new float[4]; 052 float[] rgba_dstIn = new float[4]; 053 float[] rgba_dstOut = new float[4]; 054 055 /** Creates a new instance of AdobeCompositeContext 056 * @param compositeType 057 * @param extraAlpha 058 */ 059 public AdobeCompositeContext(int compositeType, float extraAlpha) 060 { 061 this.compositeType = compositeType; 062 this.extraAlpha = extraAlpha; 063 064 rgba_dstOut[3] = 1f; 065 } 066 067 public void compose(Raster src, Raster dstIn, WritableRaster dstOut) 068 { 069 int width = src.getWidth(); 070 int height = src.getHeight(); 071 072 for (int j = 0; j < height; j++) 073 { 074 for (int i = 0; i < width; i++) 075 { 076 src.getPixel(i, j, rgba_src); 077 dstIn.getPixel(i, j, rgba_dstIn); 078 079 //Ignore transparent pixels 080 if (rgba_src[3] == 0) 081 { 082// dstOut.setPixel(i, j, rgba_dstIn); 083 continue; 084 } 085 086 float alpha = rgba_src[3]; 087 088 switch (compositeType) 089 { 090 default: 091 case AdobeComposite.CT_NORMAL: 092 rgba_dstOut[0] = rgba_src[0] * alpha + rgba_dstIn[0] * (1f - alpha); 093 rgba_dstOut[1] = rgba_src[1] * alpha + rgba_dstIn[1] * (1f - alpha); 094 rgba_dstOut[2] = rgba_src[2] * alpha + rgba_dstIn[2] * (1f - alpha); 095 break; 096 case AdobeComposite.CT_MULTIPLY: 097 rgba_dstOut[0] = rgba_src[0] * rgba_dstIn[0] * alpha + rgba_dstIn[0] * (1f - alpha); 098 rgba_dstOut[1] = rgba_src[1] * rgba_dstIn[1] * alpha + rgba_dstIn[1] * (1f - alpha); 099 rgba_dstOut[2] = rgba_src[2] * rgba_dstIn[2] * alpha + rgba_dstIn[2] * (1f - alpha); 100 break; 101 } 102 } 103 } 104 } 105 106 public void dispose() { 107 } 108 109}