author | dxu |
Thu, 04 Apr 2013 15:39:17 -0700 | |
changeset 16734 | da1901d79073 |
parent 12813 | c10ab96dcf41 |
child 21278 | ef8a3a2a72f2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.java2d.pipe; |
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import java.awt.AlphaComposite; |
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import java.awt.Composite; |
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import sun.font.GlyphList; |
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import sun.java2d.SunGraphics2D; |
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import sun.java2d.SurfaceData; |
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import static sun.java2d.pipe.BufferedOpCodes.*; |
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import java.lang.annotation.Native; |
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public abstract class BufferedTextPipe extends GlyphListPipe { |
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@Native private static final int BYTES_PER_GLYPH_IMAGE = 8; |
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@Native private static final int BYTES_PER_GLYPH_POSITION = 8; |
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/** |
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* The following offsets are used to pack the parameters in |
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* createPackedParams(). (They are also used at the native level when |
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* unpacking the params.) |
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*/ |
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@Native private static final int OFFSET_CONTRAST = 8; |
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@Native private static final int OFFSET_RGBORDER = 2; |
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@Native private static final int OFFSET_SUBPIXPOS = 1; |
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@Native private static final int OFFSET_POSITIONS = 0; |
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/** |
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* Packs the given parameters into a single int value in order to save |
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* space on the rendering queue. Note that most of these parameters |
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* are only used for rendering LCD-optimized text, but conditionalizing |
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* this work wouldn't make any impact on performance, so we will pack |
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* those parameters even in the non-LCD case. |
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*/ |
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private static int createPackedParams(SunGraphics2D sg2d, GlyphList gl) { |
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return |
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(((gl.usePositions() ? 1 : 0) << OFFSET_POSITIONS) | |
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((gl.isSubPixPos() ? 1 : 0) << OFFSET_SUBPIXPOS) | |
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((gl.isRGBOrder() ? 1 : 0) << OFFSET_RGBORDER ) | |
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((sg2d.lcdTextContrast & 0xff) << OFFSET_CONTRAST )); |
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} |
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protected final RenderQueue rq; |
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protected BufferedTextPipe(RenderQueue rq) { |
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this.rq = rq; |
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} |
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@Override |
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protected void drawGlyphList(SunGraphics2D sg2d, GlyphList gl) { |
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/* |
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* The native drawGlyphList() only works with two composite types: |
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* - CompositeType.SrcOver (with any extra alpha), or |
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* - CompositeType.Xor |
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*/ |
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Composite comp = sg2d.composite; |
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if (comp == AlphaComposite.Src) { |
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/* |
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* In addition to the composite types listed above, the logic |
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* in OGL/D3DSurfaceData.validatePipe() allows for |
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* CompositeType.SrcNoEa, but only in the presence of an opaque |
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* color. If we reach this case, we know the color is opaque, |
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* and therefore SrcNoEa is the same as SrcOverNoEa, so we |
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* override the composite here. |
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*/ |
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comp = AlphaComposite.SrcOver; |
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} |
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rq.lock(); |
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try { |
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validateContext(sg2d, comp); |
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enqueueGlyphList(sg2d, gl); |
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} finally { |
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rq.unlock(); |
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} |
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} |
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private void enqueueGlyphList(final SunGraphics2D sg2d, |
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final GlyphList gl) |
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{ |
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// assert rq.lock.isHeldByCurrentThread(); |
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RenderBuffer buf = rq.getBuffer(); |
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final int totalGlyphs = gl.getNumGlyphs(); |
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int glyphBytesRequired = totalGlyphs * BYTES_PER_GLYPH_IMAGE; |
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int posBytesRequired = |
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gl.usePositions() ? totalGlyphs * BYTES_PER_GLYPH_POSITION : 0; |
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int totalBytesRequired = 24 + glyphBytesRequired + posBytesRequired; |
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final long[] images = gl.getImages(); |
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final float glyphListOrigX = gl.getX() + 0.5f; |
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final float glyphListOrigY = gl.getY() + 0.5f; |
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// make sure the RenderQueue keeps a hard reference to the FontStrike |
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// so that the associated glyph images are not disposed while enqueued |
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rq.addReference(gl.getStrike()); |
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if (totalBytesRequired <= buf.capacity()) { |
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if (totalBytesRequired > buf.remaining()) { |
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// process the queue first and then enqueue the glyphs |
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rq.flushNow(); |
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} |
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rq.ensureAlignment(20); |
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buf.putInt(DRAW_GLYPH_LIST); |
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// enqueue parameters |
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buf.putInt(totalGlyphs); |
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buf.putInt(createPackedParams(sg2d, gl)); |
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buf.putFloat(glyphListOrigX); |
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buf.putFloat(glyphListOrigY); |
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// now enqueue glyph information |
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buf.put(images, 0, totalGlyphs); |
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if (gl.usePositions()) { |
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float[] positions = gl.getPositions(); |
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buf.put(positions, 0, 2*totalGlyphs); |
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} |
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} else { |
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// queue is too small to accomodate glyphs; perform |
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// the operation directly on the queue flushing thread |
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rq.flushAndInvokeNow(new Runnable() { |
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public void run() { |
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drawGlyphList(totalGlyphs, gl.usePositions(), |
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gl.isSubPixPos(), gl.isRGBOrder(), |
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sg2d.lcdTextContrast, |
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glyphListOrigX, glyphListOrigY, |
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images, gl.getPositions()); |
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} |
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}); |
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} |
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} |
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/** |
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* Called as a separate Runnable when the operation is too large to fit |
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* on the RenderQueue. The OGL/D3D pipelines each have their own (small) |
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* native implementation of this method. |
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*/ |
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protected abstract void drawGlyphList(int numGlyphs, boolean usePositions, |
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boolean subPixPos, boolean rgbOrder, |
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int lcdContrast, |
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float glOrigX, float glOrigY, |
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long[] images, float[] positions); |
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/** |
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* Validates the state in the provided SunGraphics2D object. |
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*/ |
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protected abstract void validateContext(SunGraphics2D sg2d, |
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Composite comp); |
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} |