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JBR-5638: improved renderer performance for simple rectangular area (…
…see BBoxAATileGenerator), added new statistics in Renderer
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src/main/java/sun/java2d/marlin/BBoxAATileGenerator.java
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| /* | ||
| * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved. | ||
| * Copyright (c) 2023, JetBrains s.r.o.. All rights reserved. | ||
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| * | ||
| * This code is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License version 2 only, as | ||
| * published by the Free Software Foundation. Oracle designates this | ||
| * particular file as subject to the "Classpath" exception as provided | ||
| * by Oracle in the LICENSE file that accompanied this code. | ||
| * | ||
| * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| * version 2 for more details (a copy is included in the LICENSE file that | ||
| * accompanied this code). | ||
| * | ||
| * You should have received a copy of the GNU General Public License version | ||
| * 2 along with this work; if not, write to the Free Software Foundation, | ||
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| * | ||
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| * or visit www.oracle.com if you need additional information or have any | ||
| * questions. | ||
| */ | ||
|
|
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| package sun.java2d.marlin; | ||
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| import sun.java2d.pipe.AATileGenerator; | ||
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| class BBoxAATileGenerator implements AATileGenerator, MarlinConst { | ||
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| protected static final boolean DISABLE_BLEND = false; | ||
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| protected final Renderer renderer; | ||
| protected final MarlinCache cache; | ||
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| // per-thread renderer stats | ||
| final RendererStats rdrStats; | ||
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| BBoxAATileGenerator(final RendererStats stats, final Renderer r, | ||
| final MarlinCache cache) | ||
| { | ||
| this.rdrStats = stats; | ||
| this.renderer = r; | ||
| this.cache = cache; | ||
| } | ||
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| /** | ||
| * Disposes this tile generator: | ||
| * clean up before reusing this instance | ||
| */ | ||
| @Override | ||
| public void dispose() { | ||
| if (DO_MONITORS) { | ||
| // called from AAShapePipe.renderTiles() (render tiles end): | ||
| rdrStats.mon_pipe_renderTiles.stop(); | ||
| } | ||
| // dispose renderer and recycle the RendererContext instance: | ||
| renderer.dispose(); | ||
| } | ||
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| public final void getBbox(int[] bbox) { | ||
| bbox[0] = cache.bboxX0; | ||
| bbox[1] = cache.bboxY0; | ||
| bbox[2] = cache.bboxX1; | ||
| bbox[3] = cache.bboxY1; | ||
| } | ||
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| /** | ||
| * Gets the width of the tiles that the generator batches output into. | ||
| * @return the width of the standard alpha tile | ||
| */ | ||
| @Override | ||
| public final int getTileWidth() { | ||
| if (DO_MONITORS) { | ||
| // called from AAShapePipe.renderTiles() (render tiles start): | ||
| rdrStats.mon_pipe_renderTiles.start(); | ||
| } | ||
| return TILE_W; | ||
| } | ||
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| /** | ||
| * Gets the height of the tiles that the generator batches output into. | ||
| * @return the height of the standard alpha tile | ||
| */ | ||
| @Override | ||
| public final int getTileHeight() { | ||
| return TILE_H; | ||
| } | ||
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| /** | ||
| * Gets the typical alpha value that will characterize the current | ||
| * tile. | ||
| * The answer may be 0x00 to indicate that the current tile has | ||
| * no coverage in any of its pixels, or it may be 0xff to indicate | ||
| * that the current tile is completely covered by the path, or any | ||
| * other value to indicate non-trivial coverage cases. | ||
| * @return 0x00 for no coverage, 0xff for total coverage, or any other | ||
| * value for partial coverage of the tile | ||
| */ | ||
| @Override | ||
| public int getTypicalAlpha() { | ||
| if (DISABLE_BLEND) { | ||
| // always return empty tiles to disable blending operations | ||
| return 0x00; | ||
| } | ||
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| // Note: if we have a filled rectangle that doesn't end on a tile | ||
| // border, we could still return 0xff, even though al!=maxTileAlphaSum | ||
| // This is because if we return 0xff, our users will fill a rectangle | ||
| // starting at x,y that has width = Math.min(TILE_SIZE, bboxX1-x), | ||
| // and height min(TILE_SIZE,bboxY1-y), which is what should happen. | ||
| // However, to support this, we would have to use 2 Math.min's | ||
| // and 2 multiplications per tile, instead of just 2 multiplications | ||
| // to compute maxTileAlphaSum. The savings offered would probably | ||
| // not be worth it, considering how rare this case is. | ||
| // Note: I have not tested this, so in the future if it is determined | ||
| // that it is worth it, it should be implemented. Perhaps this method's | ||
| // interface should be changed to take arguments the width and height | ||
| // of the current tile. This would eliminate the 2 Math.min calls that | ||
| // would be needed here, since our caller needs to compute these 2 | ||
| // values anyway. | ||
| // this default implementation returns FULL tiles: | ||
| final int alpha = 0xff; | ||
| if (DO_STATS) { | ||
| rdrStats.hist_tile_generator_alpha.add(alpha); | ||
| } | ||
| return alpha; | ||
| } | ||
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| /** | ||
| * Skips the current tile and moves on to the next tile. | ||
| * Either this method, or the getAlpha() method should be called | ||
| * once per tile, but not both. | ||
| */ | ||
| @Override | ||
| public void nextTile() { | ||
| // this default implementation does nothing | ||
| } | ||
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| /** | ||
| * Gets the alpha coverage values for the current tile. | ||
| * Either this method, or the nextTile() method should be called | ||
| * once per tile, but not both. | ||
| */ | ||
| @Override | ||
| public void getAlpha(final byte[] tile, final int offset, | ||
| final int rowstride) | ||
| { | ||
| // this default implementation does nothing | ||
| } | ||
| } |
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