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 public AdobeCompositeContext(int compositeType, float extraAlpha) 057 { 058 this.compositeType = compositeType; 059 this.extraAlpha = extraAlpha; 060 061 rgba_dstOut[3] = 1f; 062 } 063 064 public void compose(Raster src, Raster dstIn, WritableRaster dstOut) 065 { 066 int width = src.getWidth(); 067 int height = src.getHeight(); 068 069 for (int j = 0; j < height; j++) 070 { 071 for (int i = 0; i < width; i++) 072 { 073 src.getPixel(i, j, rgba_src); 074 dstIn.getPixel(i, j, rgba_dstIn); 075 076 //Ignore transparent pixels 077 if (rgba_src[3] == 0) 078 { 079// dstOut.setPixel(i, j, rgba_dstIn); 080 continue; 081 } 082 083 float alpha = rgba_src[3]; 084 085 switch (compositeType) 086 { 087 default: 088 case AdobeComposite.CT_NORMAL: 089 rgba_dstOut[0] = rgba_src[0] * alpha + rgba_dstIn[0] * (1f - alpha); 090 rgba_dstOut[1] = rgba_src[1] * alpha + rgba_dstIn[1] * (1f - alpha); 091 rgba_dstOut[2] = rgba_src[2] * alpha + rgba_dstIn[2] * (1f - alpha); 092 break; 093 case AdobeComposite.CT_MULTIPLY: 094 rgba_dstOut[0] = rgba_src[0] * rgba_dstIn[0] * alpha + rgba_dstIn[0] * (1f - alpha); 095 rgba_dstOut[1] = rgba_src[1] * rgba_dstIn[1] * alpha + rgba_dstIn[1] * (1f - alpha); 096 rgba_dstOut[2] = rgba_src[2] * rgba_dstIn[2] * alpha + rgba_dstIn[2] * (1f - alpha); 097 break; 098 } 099 } 100 } 101 } 102 103 public void dispose() { 104 } 105 106}