1 /*
   2  * Copyright (c) 2007, 2008, 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      */
  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 }