1 /* 2 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.java2d.pipe; 27 28 import java.awt.AlphaComposite; 29 import java.awt.Composite; 30 import sun.java2d.SunGraphics2D; 31 import sun.java2d.SurfaceData; 32 import sun.java2d.loops.CompositeType; 33 import sun.java2d.loops.MaskFill; 34 import sun.java2d.loops.SurfaceType; 35 import static sun.java2d.pipe.BufferedOpCodes.*; 36 37 /** 38 * The MaskFill operation is expressed as: 39 * dst = ((src <MODE> dst) * pathA) + (dst * (1 - pathA)) 40 * 41 * The OGL/D3D implementation of the MaskFill operation differs from the above 42 * equation because it is not possible to perform such a complex operation in 43 * OpenGL/Direct3D (without the use of advanced techniques like fragment 44 * shaders and multitexturing). Therefore, the BufferedMaskFill operation 45 * is expressed as: 46 * dst = (src * pathA) <SrcOver> dst 47 * 48 * This simplified formula is only equivalent to the "true" MaskFill equation 49 * in the following situations: 50 * - <MODE> is SrcOver 51 * - <MODE> is Src, extra alpha == 1.0, and the source paint is opaque 52 * 53 * Therefore, we register BufferedMaskFill primitives for only the SurfaceType 54 * and CompositeType restrictions mentioned above. In addition, for the 55 * SrcNoEa case we must override the incoming composite with a SrcOver (no 56 * extra alpha) instance, so that we set up the OpenGL/Direct3D blending 57 * mode to match the BufferedMaskFill equation. 58 */ 59 public abstract class BufferedMaskFill extends MaskFill { 60 61 protected final RenderQueue rq; 62 BufferedMaskFill(RenderQueue rq, SurfaceType srcType, CompositeType compType, SurfaceType dstType)63 protected BufferedMaskFill(RenderQueue rq, 64 SurfaceType srcType, 65 CompositeType compType, 66 SurfaceType dstType) 67 { 68 super(srcType, compType, dstType); 69 this.rq = rq; 70 } 71 72 @Override MaskFill(SunGraphics2D sg2d, SurfaceData sData, Composite comp, final int x, final int y, final int w, final int h, final byte[] mask, final int maskoff, final int maskscan)73 public void MaskFill(SunGraphics2D sg2d, SurfaceData sData, 74 Composite comp, 75 final int x, final int y, final int w, final int h, 76 final byte[] mask, 77 final int maskoff, final int maskscan) 78 { 79 AlphaComposite acomp = (AlphaComposite)comp; 80 if (acomp.getRule() != AlphaComposite.SRC_OVER) { 81 comp = AlphaComposite.SrcOver; 82 } 83 84 rq.lock(); 85 try { 86 validateContext(sg2d, comp, BufferedContext.USE_MASK); 87 88 // we adjust the mask length so that the mask ends on a 89 // 4-byte boundary 90 int maskBytesRequired; 91 if (mask != null) { 92 // we adjust the mask length so that the mask ends on a 93 // 4-byte boundary 94 maskBytesRequired = (mask.length + 3) & (~3); 95 } else { 96 // mask not needed 97 maskBytesRequired = 0; 98 } 99 int totalBytesRequired = 32 + maskBytesRequired; 100 101 RenderBuffer buf = rq.getBuffer(); 102 if (totalBytesRequired <= buf.capacity()) { 103 if (totalBytesRequired > buf.remaining()) { 104 // process the queue first and then enqueue the mask 105 rq.flushNow(); 106 } 107 108 buf.putInt(MASK_FILL); 109 // enqueue parameters 110 buf.putInt(x).putInt(y).putInt(w).putInt(h); 111 buf.putInt(maskoff); 112 buf.putInt(maskscan); 113 buf.putInt(maskBytesRequired); 114 if (mask != null) { 115 // enqueue the mask 116 int padding = maskBytesRequired - mask.length; 117 buf.put(mask); 118 if (padding != 0) { 119 buf.position(buf.position() + padding); 120 } 121 } 122 } else { 123 // queue is too small to accommodate entire mask; perform 124 // the operation directly on the queue flushing thread 125 rq.flushAndInvokeNow(new Runnable() { 126 public void run() { 127 maskFill(x, y, w, h, 128 maskoff, maskscan, mask.length, mask); 129 } 130 }); 131 } 132 } finally { 133 rq.unlock(); 134 } 135 } 136 137 /** 138 * Called as a separate Runnable when the operation is too large to fit 139 * on the RenderQueue. The OGL/D3D pipelines each have their own (small) 140 * native implementation of this method. 141 */ maskFill(int x, int y, int w, int h, int maskoff, int maskscan, int masklen, byte[] mask)142 protected abstract void maskFill(int x, int y, int w, int h, 143 int maskoff, int maskscan, int masklen, 144 byte[] mask); 145 146 /** 147 * Validates the state in the provided SunGraphics2D object and sets up 148 * any special resources for this operation (e.g. enabling gradient 149 * shading). 150 */ validateContext(SunGraphics2D sg2d, Composite comp, int ctxflags)151 protected abstract void validateContext(SunGraphics2D sg2d, 152 Composite comp, int ctxflags); 153 } 154