D3DMaskFill.cpp revision 2362
2362N/A * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 430N/A * This implementation first copies the alpha tile into a texture and then 430N/A * maps that texture to the destination surface. This approach appears to 430N/A * offer the best performance despite being a two-step process. 430N/A * Here are some descriptions of the many variables used in this method: 430N/A * x,y - upper left corner of the tile destination 430N/A * x0 - placekeeper for the original destination x location 430N/A * sx1,sy1 - upper left corner of the mask tile source region 430N/A * sx2,sy2 - lower left corner of the mask tile source region 430N/A * sx,sy - "current" upper left corner of the mask tile region of interest 430N/A // reset current state, and ensure rendering is flushed to dest