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
26package sun.java2d.opengl;
27
28import java.awt.image.AffineTransformOp;
29import java.awt.image.BufferedImage;
30import java.awt.image.BufferedImageOp;
31import java.awt.image.ConvolveOp;
32import java.awt.image.LookupOp;
33import java.awt.image.RescaleOp;
34import sun.java2d.SunGraphics2D;
35import sun.java2d.SurfaceData;
36import sun.java2d.loops.CompositeType;
37import sun.java2d.pipe.BufferedBufImgOps;
38import static sun.java2d.opengl.OGLContext.OGLContextCaps.*;
39
40class 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     */
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