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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.font.GlyphList; | ||
| 31 | import sun.java2d.SunGraphics2D; | ||
| 32 | import sun.java2d.SurfaceData; | ||
| 33 | import static sun.java2d.pipe.BufferedOpCodes.*; | ||
| 34 | |||
| 35 | public abstract class BufferedTextPipe extends GlyphListPipe { | ||
| 36 | |||
| 37 | private static final int BYTES_PER_GLYPH_IMAGE = 8; | ||
| 38 | private static final int BYTES_PER_GLYPH_POSITION = 8; | ||
| 39 | |||
| 40 | /** | ||
| 41 | * The following offsets are used to pack the parameters in | ||
| 42 | * createPackedParams(). (They are also used at the native level when | ||
| 43 | * unpacking the params.) | ||
| 44 | */ | ||
| 45 | private static final int OFFSET_CONTRAST = 8; | ||
| 46 | private static final int OFFSET_RGBORDER = 2; | ||
| 47 | private static final int OFFSET_SUBPIXPOS = 1; | ||
| 48 | private static final int OFFSET_POSITIONS = 0; | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Packs the given parameters into a single int value in order to save | ||
| 52 | * space on the rendering queue. Note that most of these parameters | ||
| 53 | * are only used for rendering LCD-optimized text, but conditionalizing | ||
| 54 | * this work wouldn't make any impact on performance, so we will pack | ||
| 55 | * those parameters even in the non-LCD case. | ||
| 56 | */ | ||
| 57 | private static int createPackedParams(SunGraphics2D sg2d, GlyphList gl) { | ||
| 58 | return | ||
| 59 | (((gl.usePositions() ? 1 : 0) << OFFSET_POSITIONS) | | ||
| 60 | ((gl.isSubPixPos() ? 1 : 0) << OFFSET_SUBPIXPOS) | | ||
| 61 | ((gl.isRGBOrder() ? 1 : 0) << OFFSET_RGBORDER ) | | ||
| 62 | ((sg2d.lcdTextContrast & 0xff) << OFFSET_CONTRAST )); | ||
| 63 | } | ||
| 64 | |||
| 65 | protected final RenderQueue rq; | ||
| 66 | |||
| 67 | protected BufferedTextPipe(RenderQueue rq) { | ||
| 68 | this.rq = rq; | ||
| 69 | } | ||
| 70 | |||
| 71 | @Override | ||
| 72 | protected void drawGlyphList(SunGraphics2D sg2d, GlyphList gl) { | ||
| 73 | /* | ||
| 74 | * The native drawGlyphList() only works with two composite types: | ||
| 75 | * - CompositeType.SrcOver (with any extra alpha), or | ||
| 76 | * - CompositeType.Xor | ||
| 77 | */ | ||
| 78 | Composite comp = sg2d.composite; | ||
| 79 | if (comp == AlphaComposite.Src) { | ||
| 80 | /* | ||
| 81 | * In addition to the composite types listed above, the logic | ||
| 82 | * in OGL/D3DSurfaceData.validatePipe() allows for | ||
| 83 | * CompositeType.SrcNoEa, but only in the presence of an opaque | ||
| 84 | * color. If we reach this case, we know the color is opaque, | ||
| 85 | * and therefore SrcNoEa is the same as SrcOverNoEa, so we | ||
| 86 | * override the composite here. | ||
| 87 | */ | ||
| 88 | comp = AlphaComposite.SrcOver; | ||
| 89 | } | ||
| 90 | |||
| 91 | rq.lock(); | ||
| 92 | try { | ||
| 93 | validateContext(sg2d, comp); | ||
| 94 | enqueueGlyphList(sg2d, gl); | ||
| 95 | } finally { | ||
| 96 | rq.unlock(); | ||
| 97 | } | ||
| 98 | } | ||
| 99 | |||
| 100 | private void enqueueGlyphList(final SunGraphics2D sg2d, | ||
| 101 | final GlyphList gl) | ||
| 102 | { | ||
| 103 | // assert rq.lock.isHeldByCurrentThread(); | ||
| 104 | RenderBuffer buf = rq.getBuffer(); | ||
| 105 | final int totalGlyphs = gl.getNumGlyphs(); | ||
| 106 | int glyphBytesRequired = totalGlyphs * BYTES_PER_GLYPH_IMAGE; | ||
| 107 | int posBytesRequired = | ||
| 108 | gl.usePositions() ? totalGlyphs * BYTES_PER_GLYPH_POSITION : 0; | ||
| 109 | int totalBytesRequired = 24 + glyphBytesRequired + posBytesRequired; | ||
| 110 | |||
| 111 | final long[] images = gl.getImages(); | ||
| 112 | final float glyphListOrigX = gl.getX() + 0.5f; | ||
| 113 | final float glyphListOrigY = gl.getY() + 0.5f; | ||
| 114 | |||
| 115 | // make sure the RenderQueue keeps a hard reference to the FontStrike | ||
| 116 | // so that the associated glyph images are not disposed while enqueued | ||
| 117 | rq.addReference(gl.getStrike()); | ||
| 118 | |||
| 119 | if (totalBytesRequired <= buf.capacity()) { | ||
| 120 | if (totalBytesRequired > buf.remaining()) { | ||
| 121 | // process the queue first and then enqueue the glyphs | ||
| 122 | rq.flushNow(); | ||
| 123 | } | ||
| 124 | rq.ensureAlignment(20); | ||
| 125 | buf.putInt(DRAW_GLYPH_LIST); | ||
| 126 | // enqueue parameters | ||
| 127 | buf.putInt(totalGlyphs); | ||
| 128 | buf.putInt(createPackedParams(sg2d, gl)); | ||
| 129 | buf.putFloat(glyphListOrigX); | ||
| 130 | buf.putFloat(glyphListOrigY); | ||
| 131 | // now enqueue glyph information | ||
| 132 | buf.put(images, 0, totalGlyphs); | ||
| 133 | if (gl.usePositions()) { | ||
| 134 | float[] positions = gl.getPositions(); | ||
| 135 | buf.put(positions, 0, 2*totalGlyphs); | ||
| 136 | } | ||
| 137 | } else { | ||
| 138 | // queue is too small to accomodate glyphs; perform | ||
| 139 | // the operation directly on the queue flushing thread | ||
| 140 | rq.flushAndInvokeNow(new Runnable() { | ||
| 141 | public void run() { | ||
| 142 | drawGlyphList(totalGlyphs, gl.usePositions(), | ||
| 143 | gl.isSubPixPos(), gl.isRGBOrder(), | ||
| 144 | sg2d.lcdTextContrast, | ||
| 145 | glyphListOrigX, glyphListOrigY, | ||
| 146 | images, gl.getPositions()); | ||
| 147 | } | ||
| 148 | }); | ||
| 149 | } | ||
| 150 | } | ||
| 151 | |||
| 152 | /** | ||
| 153 | * Called as a separate Runnable when the operation is too large to fit | ||
| 154 | * on the RenderQueue. The OGL/D3D pipelines each have their own (small) | ||
| 155 | * native implementation of this method. | ||
| 156 | */ | ||
| 157 | protected abstract void drawGlyphList(int numGlyphs, boolean usePositions, | ||
| 158 | boolean subPixPos, boolean rgbOrder, | ||
| 159 | int lcdContrast, | ||
| 160 | float glOrigX, float glOrigY, | ||
| 161 | long[] images, float[] positions); | ||
| 162 | |||
| 163 | /** | ||
| 164 | * Validates the state in the provided SunGraphics2D object. | ||
| 165 | */ | ||
| 166 | protected abstract void validateContext(SunGraphics2D sg2d, | ||
| 167 | Composite comp); | ||
| 168 | } | ||