0N/A/*
2362N/A * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
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 *
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 *
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.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.java2d.pipe;
0N/A
0N/Aimport java.awt.AlphaComposite;
0N/Aimport java.awt.Composite;
0N/Aimport sun.font.GlyphList;
0N/Aimport sun.java2d.SunGraphics2D;
0N/Aimport sun.java2d.SurfaceData;
0N/Aimport static sun.java2d.pipe.BufferedOpCodes.*;
0N/A
0N/Apublic abstract class BufferedTextPipe extends GlyphListPipe {
0N/A
0N/A private static final int BYTES_PER_GLYPH_IMAGE = 8;
0N/A private static final int BYTES_PER_GLYPH_POSITION = 8;
0N/A
0N/A /**
0N/A * The following offsets are used to pack the parameters in
0N/A * createPackedParams(). (They are also used at the native level when
0N/A * unpacking the params.)
0N/A */
0N/A private static final int OFFSET_CONTRAST = 8;
0N/A private static final int OFFSET_RGBORDER = 2;
0N/A private static final int OFFSET_SUBPIXPOS = 1;
0N/A private static final int OFFSET_POSITIONS = 0;
0N/A
0N/A /**
0N/A * Packs the given parameters into a single int value in order to save
0N/A * space on the rendering queue. Note that most of these parameters
0N/A * are only used for rendering LCD-optimized text, but conditionalizing
0N/A * this work wouldn't make any impact on performance, so we will pack
0N/A * those parameters even in the non-LCD case.
0N/A */
0N/A private static int createPackedParams(SunGraphics2D sg2d, GlyphList gl) {
0N/A return
0N/A (((gl.usePositions() ? 1 : 0) << OFFSET_POSITIONS) |
0N/A ((gl.isSubPixPos() ? 1 : 0) << OFFSET_SUBPIXPOS) |
0N/A ((gl.isRGBOrder() ? 1 : 0) << OFFSET_RGBORDER ) |
0N/A ((sg2d.lcdTextContrast & 0xff) << OFFSET_CONTRAST ));
0N/A }
0N/A
0N/A protected final RenderQueue rq;
0N/A
0N/A protected BufferedTextPipe(RenderQueue rq) {
0N/A this.rq = rq;
0N/A }
0N/A
0N/A @Override
0N/A protected void drawGlyphList(SunGraphics2D sg2d, GlyphList gl) {
0N/A /*
0N/A * The native drawGlyphList() only works with two composite types:
0N/A * - CompositeType.SrcOver (with any extra alpha), or
0N/A * - CompositeType.Xor
0N/A */
0N/A Composite comp = sg2d.composite;
0N/A if (comp == AlphaComposite.Src) {
0N/A /*
0N/A * In addition to the composite types listed above, the logic
0N/A * in OGL/D3DSurfaceData.validatePipe() allows for
0N/A * CompositeType.SrcNoEa, but only in the presence of an opaque
0N/A * color. If we reach this case, we know the color is opaque,
0N/A * and therefore SrcNoEa is the same as SrcOverNoEa, so we
0N/A * override the composite here.
0N/A */
0N/A comp = AlphaComposite.SrcOver;
0N/A }
0N/A
0N/A rq.lock();
0N/A try {
0N/A validateContext(sg2d, comp);
0N/A enqueueGlyphList(sg2d, gl);
0N/A } finally {
0N/A rq.unlock();
0N/A }
0N/A }
0N/A
0N/A private void enqueueGlyphList(final SunGraphics2D sg2d,
0N/A final GlyphList gl)
0N/A {
0N/A // assert rq.lock.isHeldByCurrentThread();
0N/A RenderBuffer buf = rq.getBuffer();
0N/A final int totalGlyphs = gl.getNumGlyphs();
0N/A int glyphBytesRequired = totalGlyphs * BYTES_PER_GLYPH_IMAGE;
0N/A int posBytesRequired =
0N/A gl.usePositions() ? totalGlyphs * BYTES_PER_GLYPH_POSITION : 0;
0N/A int totalBytesRequired = 24 + glyphBytesRequired + posBytesRequired;
0N/A
0N/A final long[] images = gl.getImages();
0N/A final float glyphListOrigX = gl.getX() + 0.5f;
0N/A final float glyphListOrigY = gl.getY() + 0.5f;
0N/A
0N/A // make sure the RenderQueue keeps a hard reference to the FontStrike
0N/A // so that the associated glyph images are not disposed while enqueued
0N/A rq.addReference(gl.getStrike());
0N/A
0N/A if (totalBytesRequired <= buf.capacity()) {
0N/A if (totalBytesRequired > buf.remaining()) {
0N/A // process the queue first and then enqueue the glyphs
0N/A rq.flushNow();
0N/A }
0N/A rq.ensureAlignment(20);
0N/A buf.putInt(DRAW_GLYPH_LIST);
0N/A // enqueue parameters
0N/A buf.putInt(totalGlyphs);
0N/A buf.putInt(createPackedParams(sg2d, gl));
0N/A buf.putFloat(glyphListOrigX);
0N/A buf.putFloat(glyphListOrigY);
0N/A // now enqueue glyph information
0N/A buf.put(images, 0, totalGlyphs);
0N/A if (gl.usePositions()) {
0N/A float[] positions = gl.getPositions();
0N/A buf.put(positions, 0, 2*totalGlyphs);
0N/A }
0N/A } else {
0N/A // queue is too small to accomodate glyphs; perform
0N/A // the operation directly on the queue flushing thread
0N/A rq.flushAndInvokeNow(new Runnable() {
0N/A public void run() {
0N/A drawGlyphList(totalGlyphs, gl.usePositions(),
0N/A gl.isSubPixPos(), gl.isRGBOrder(),
0N/A sg2d.lcdTextContrast,
0N/A glyphListOrigX, glyphListOrigY,
0N/A images, gl.getPositions());
0N/A }
0N/A });
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Called as a separate Runnable when the operation is too large to fit
0N/A * on the RenderQueue. The OGL/D3D pipelines each have their own (small)
0N/A * native implementation of this method.
0N/A */
0N/A protected abstract void drawGlyphList(int numGlyphs, boolean usePositions,
0N/A boolean subPixPos, boolean rgbOrder,
0N/A int lcdContrast,
0N/A float glOrigX, float glOrigY,
0N/A long[] images, float[] positions);
0N/A
0N/A /**
0N/A * Validates the state in the provided SunGraphics2D object.
0N/A */
0N/A protected abstract void validateContext(SunGraphics2D sg2d,
0N/A Composite comp);
0N/A}