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| 1 | +/* | |
| 2 | + * Copyright (c) 2007, 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 | + | |
| 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 | |
| 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 accomodate 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 | + */ | |
| 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 | + */ | |
| 151 | + protected abstract void validateContext(SunGraphics2D sg2d, | |
| 152 | + Composite comp, int ctxflags); | |
| 153 | +} | |