1 /*
2  * Copyright (c) 2007, 2011, 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.opengl;
27 
28 import java.awt.image.AffineTransformOp;
29 import java.awt.image.BufferedImage;
30 import java.awt.image.BufferedImageOp;
31 import java.awt.image.ConvolveOp;
32 import java.awt.image.LookupOp;
33 import java.awt.image.RescaleOp;
34 import sun.java2d.SunGraphics2D;
35 import sun.java2d.SurfaceData;
36 import sun.java2d.loops.CompositeType;
37 import sun.java2d.pipe.BufferedBufImgOps;
38 import static sun.java2d.opengl.OGLContext.OGLContextCaps.*;
39 
40 class OGLBufImgOps extends BufferedBufImgOps {
41 
42     /**
43      * This method is called from OGLDrawImage.transformImage() only.  It
44      * validates the provided BufferedImageOp to determine whether the op
45      * is one that can be accelerated by the OGL pipeline.  If the operation
46      * cannot be completed for any reason, this method returns false;
47      * otherwise, the given BufferedImage is rendered to the destination
48      * using the provided BufferedImageOp and this method returns true.
49      */
renderImageWithOp(SunGraphics2D sg, BufferedImage img, BufferedImageOp biop, int x, int y)50     static boolean renderImageWithOp(SunGraphics2D sg, BufferedImage img,
51                                      BufferedImageOp biop, int x, int y)
52     {
53         // Validate the provided BufferedImage (make sure it is one that
54         // is supported, and that its properties are acceleratable)
55         if (biop instanceof ConvolveOp) {
56             if (!isConvolveOpValid((ConvolveOp)biop)) {
57                 return false;
58             }
59         } else if (biop instanceof RescaleOp) {
60             if (!isRescaleOpValid((RescaleOp)biop, img)) {
61                 return false;
62             }
63         } else if (biop instanceof LookupOp) {
64             if (!isLookupOpValid((LookupOp)biop, img)) {
65                 return false;
66             }
67         } else {
68             // No acceleration for other BufferedImageOps (yet)
69             return false;
70         }
71 
72         SurfaceData dstData = sg.surfaceData;
73         if (!(dstData instanceof OGLSurfaceData) ||
74             (sg.interpolationType == AffineTransformOp.TYPE_BICUBIC) ||
75             (sg.compositeState > SunGraphics2D.COMP_ALPHA))
76         {
77             return false;
78         }
79 
80         SurfaceData srcData =
81             dstData.getSourceSurfaceData(img, SunGraphics2D.TRANSFORM_ISIDENT,
82                                          CompositeType.SrcOver, null);
83         if (!(srcData instanceof OGLSurfaceData)) {
84             // REMIND: this hack tries to ensure that we have a cached texture
85             srcData =
86                 dstData.getSourceSurfaceData(img, SunGraphics2D.TRANSFORM_ISIDENT,
87                                              CompositeType.SrcOver, null);
88             if (!(srcData instanceof OGLSurfaceData)) {
89                 return false;
90             }
91         }
92 
93         // Verify that the source surface is actually a texture and
94         // that the operation is supported
95         OGLSurfaceData oglSrc = (OGLSurfaceData)srcData;
96         OGLGraphicsConfig gc = oglSrc.getOGLGraphicsConfig();
97         if (oglSrc.getType() != OGLSurfaceData.TEXTURE ||
98             !gc.isCapPresent(CAPS_EXT_BIOP_SHADER))
99         {
100             return false;
101         }
102 
103         int sw = img.getWidth();
104         int sh = img.getHeight();
105         OGLBlitLoops.IsoBlit(srcData, dstData,
106                              img, biop,
107                              sg.composite, sg.getCompClip(),
108                              sg.transform, sg.interpolationType,
109                              0, 0, sw, sh,
110                              x, y, x+sw, y+sh,
111                              true);
112 
113         return true;
114     }
115 }
116