| /* |
| * Copyright (c) 2007, 2008, Oracle and/or its affiliates. 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. |
| */ |
| |
| package sun.java2d.opengl; |
| |
| import java.awt.GradientPaint; |
| import java.awt.LinearGradientPaint; |
| import java.awt.MultipleGradientPaint; |
| import java.awt.MultipleGradientPaint.ColorSpaceType; |
| import java.awt.MultipleGradientPaint.CycleMethod; |
| import java.awt.RadialGradientPaint; |
| import java.awt.TexturePaint; |
| import java.awt.image.BufferedImage; |
| import java.util.HashMap; |
| import java.util.Map; |
| import sun.java2d.SunGraphics2D; |
| import sun.java2d.SurfaceData; |
| import sun.java2d.loops.CompositeType; |
| import static sun.java2d.pipe.BufferedPaints.*; |
| import static sun.java2d.opengl.OGLContext.OGLContextCaps.*; |
| |
| abstract class OGLPaints { |
| |
| /** |
| * Holds all registered implementations, using the corresponding |
| * SunGraphics2D.PAINT_* constant as the hash key. |
| */ |
| private static Map<Integer, OGLPaints> impls = |
| new HashMap<Integer, OGLPaints>(4, 1.0f); |
| |
| static { |
| impls.put(SunGraphics2D.PAINT_GRADIENT, new Gradient()); |
| impls.put(SunGraphics2D.PAINT_LIN_GRADIENT, new LinearGradient()); |
| impls.put(SunGraphics2D.PAINT_RAD_GRADIENT, new RadialGradient()); |
| impls.put(SunGraphics2D.PAINT_TEXTURE, new Texture()); |
| } |
| |
| /** |
| * Attempts to locate an implementation corresponding to the paint state |
| * of the provided SunGraphics2D object. If no implementation can be |
| * found, or if the paint cannot be accelerated under the conditions |
| * of the SunGraphics2D, this method returns false; otherwise, returns |
| * true. |
| */ |
| static boolean isValid(SunGraphics2D sg2d) { |
| OGLPaints impl = impls.get(sg2d.paintState); |
| return (impl != null && impl.isPaintValid(sg2d)); |
| } |
| |
| /** |
| * Returns true if this implementation is able to accelerate the |
| * Paint object associated with, and under the conditions of, the |
| * provided SunGraphics2D instance; otherwise returns false. |
| */ |
| abstract boolean isPaintValid(SunGraphics2D sg2d); |
| |
| /************************* GradientPaint support ****************************/ |
| |
| private static class Gradient extends OGLPaints { |
| private Gradient() {} |
| |
| /** |
| * There are no restrictions for accelerating GradientPaint, so |
| * this method always returns true. |
| */ |
| @Override |
| boolean isPaintValid(SunGraphics2D sg2d) { |
| return true; |
| } |
| } |
| |
| /************************** TexturePaint support ****************************/ |
| |
| private static class Texture extends OGLPaints { |
| private Texture() {} |
| |
| /** |
| * Returns true if the given TexturePaint instance can be used by the |
| * accelerated OGLPaints.Texture implementation. A TexturePaint is |
| * considered valid if the following conditions are met: |
| * - the texture image dimensions are power-of-two (or the |
| * GL_ARB_texture_non_power_of_two extension is present) |
| * - the texture image can be (or is already) cached in an OpenGL |
| * texture object |
| */ |
| @Override |
| boolean isPaintValid(SunGraphics2D sg2d) { |
| TexturePaint paint = (TexturePaint)sg2d.paint; |
| OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData; |
| BufferedImage bi = paint.getImage(); |
| |
| // see if texture-non-pow2 extension is available |
| if (!dstData.isTexNonPow2Available()) { |
| int imgw = bi.getWidth(); |
| int imgh = bi.getHeight(); |
| |
| // verify that the texture image dimensions are pow2 |
| if ((imgw & (imgw - 1)) != 0 || (imgh & (imgh - 1)) != 0) { |
| return false; |
| } |
| } |
| |
| SurfaceData srcData = |
| dstData.getSourceSurfaceData(bi, sg2d.TRANSFORM_ISIDENT, |
| CompositeType.SrcOver, null); |
| if (!(srcData instanceof OGLSurfaceData)) { |
| // REMIND: this is a hack that attempts to cache the system |
| // memory image from the TexturePaint instance into an |
| // OpenGL texture... |
| srcData = |
| dstData.getSourceSurfaceData(bi, sg2d.TRANSFORM_ISIDENT, |
| CompositeType.SrcOver, null); |
| if (!(srcData instanceof OGLSurfaceData)) { |
| return false; |
| } |
| } |
| |
| // verify that the source surface is actually a texture |
| OGLSurfaceData oglData = (OGLSurfaceData)srcData; |
| if (oglData.getType() != OGLSurfaceData.TEXTURE) { |
| return false; |
| } |
| |
| return true; |
| } |
| } |
| |
| /****************** Shared MultipleGradientPaint support ********************/ |
| |
| private static abstract class MultiGradient extends OGLPaints { |
| protected MultiGradient() {} |
| |
| /** |
| * Returns true if the given MultipleGradientPaint instance can be |
| * used by the accelerated OGLPaints.MultiGradient implementation. |
| * A MultipleGradientPaint is considered valid if the following |
| * conditions are met: |
| * - the number of gradient "stops" is <= MAX_FRACTIONS |
| * - the destination has support for fragment shaders |
| */ |
| @Override |
| boolean isPaintValid(SunGraphics2D sg2d) { |
| MultipleGradientPaint paint = (MultipleGradientPaint)sg2d.paint; |
| // REMIND: ugh, this creates garbage; would be nicer if |
| // we had a MultipleGradientPaint.getNumStops() method... |
| if (paint.getFractions().length > MULTI_MAX_FRACTIONS) { |
| return false; |
| } |
| |
| OGLSurfaceData dstData = (OGLSurfaceData)sg2d.surfaceData; |
| OGLGraphicsConfig gc = dstData.getOGLGraphicsConfig(); |
| if (!gc.isCapPresent(CAPS_EXT_GRAD_SHADER)) { |
| return false; |
| } |
| |
| return true; |
| } |
| } |
| |
| /********************** LinearGradientPaint support *************************/ |
| |
| private static class LinearGradient extends MultiGradient { |
| private LinearGradient() {} |
| |
| @Override |
| boolean isPaintValid(SunGraphics2D sg2d) { |
| LinearGradientPaint paint = (LinearGradientPaint)sg2d.paint; |
| |
| if (paint.getFractions().length == 2 && |
| paint.getCycleMethod() != CycleMethod.REPEAT && |
| paint.getColorSpace() != ColorSpaceType.LINEAR_RGB) |
| { |
| // we can delegate to the optimized two-color gradient |
| // codepath, which does not require fragment shader support |
| return true; |
| } |
| |
| return super.isPaintValid(sg2d); |
| } |
| } |
| |
| /********************** RadialGradientPaint support *************************/ |
| |
| private static class RadialGradient extends MultiGradient { |
| private RadialGradient() {} |
| } |
| } |
