1 /*
   2  * Copyright (c) 2004, 2013, 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 sun.java2d.pipe.BufferedContext;
  29 import sun.java2d.pipe.RenderBuffer;
  30 import sun.java2d.pipe.RenderQueue;
  31 import sun.java2d.pipe.hw.ContextCapabilities;
  32 import static sun.java2d.pipe.BufferedOpCodes.*;
  33 import static sun.java2d.pipe.hw.ContextCapabilities.*;
  34 
  35 import java.lang.annotation.Native;
  36 
  37 /**
  38  * Note that the RenderQueue lock must be acquired before calling any of
  39  * the methods in this class.
  40  */
  41 public class OGLContext extends BufferedContext {
  42 
  43     private final OGLGraphicsConfig config;
  44 
  45     OGLContext(RenderQueue rq, OGLGraphicsConfig config) {
  46         super(rq);
  47         this.config = config;
  48     }
  49 
  50     /**
  51      * Convenience method that delegates to setScratchSurface() below.
  52      */
  53     static void setScratchSurface(OGLGraphicsConfig gc) {
  54         setScratchSurface(gc.getNativeConfigInfo());
  55     }
  56 
  57     /**
  58      * Makes the given GraphicsConfig's context current to its associated
  59      * "scratch surface".  Each GraphicsConfig maintains a native context
  60      * (GLXContext on Unix, HGLRC on Windows) as well as a native pbuffer
  61      * known as the "scratch surface".  By making the context current to the
  62      * scratch surface, we are assured that we have a current context for
  63      * the relevant GraphicsConfig, and can therefore perform operations
  64      * depending on the capabilities of that GraphicsConfig.  For example,
  65      * if the GraphicsConfig supports the GL_ARB_texture_non_power_of_two
  66      * extension, then we should be able to make a non-pow2 texture for this
  67      * GraphicsConfig once we make the context current to the scratch surface.
  68      *
  69      * This method should be used for operations with an OpenGL texture
  70      * as the destination surface (e.g. a sw->texture blit loop), or in those
  71      * situations where we may not otherwise have a current context (e.g.
  72      * when disposing a texture-based surface).
  73      */
  74     static void setScratchSurface(long pConfigInfo) {
  75         // assert OGLRenderQueue.getInstance().lock.isHeldByCurrentThread();
  76 
  77         // invalidate the current context
  78         currentContext = null;
  79 
  80         // set the scratch context
  81         OGLRenderQueue rq = OGLRenderQueue.getInstance();
  82         RenderBuffer buf = rq.getBuffer();
  83         rq.ensureCapacityAndAlignment(12, 4);
  84         buf.putInt(SET_SCRATCH_SURFACE);
  85         buf.putLong(pConfigInfo);
  86     }
  87 
  88     /**
  89      * Invalidates the currentContext field to ensure that we properly
  90      * revalidate the OGLContext (make it current, etc.) next time through
  91      * the validate() method.  This is typically invoked from methods
  92      * that affect the current context state (e.g. disposing a context or
  93      * surface).
  94      */
  95     static void invalidateCurrentContext() {
  96         // assert OGLRenderQueue.getInstance().lock.isHeldByCurrentThread();
  97 
  98         // invalidate the current Java-level context so that we
  99         // revalidate everything the next time around
 100         if (currentContext != null) {
 101             currentContext.invalidateContext();
 102             currentContext = null;
 103         }
 104 
 105         // invalidate the context reference at the native level, and
 106         // then flush the queue so that we have no pending operations
 107         // dependent on the current context
 108         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 109         rq.ensureCapacity(4);
 110         rq.getBuffer().putInt(INVALIDATE_CONTEXT);
 111         rq.flushNow();
 112     }
 113 
 114     public RenderQueue getRenderQueue() {
 115         return OGLRenderQueue.getInstance();
 116     }
 117 
 118     /**
 119      * Returns a string representing adapter id (vendor, renderer, version).
 120      * Must be called on the rendering thread.
 121      *
 122      * @return an id string for the adapter
 123      */
 124     static final native String getOGLIdString();
 125 
 126     @Override
 127     public void saveState() {
 128         // assert rq.lock.isHeldByCurrentThread();
 129 
 130         // reset all attributes of this and current contexts
 131         invalidateContext();
 132         invalidateCurrentContext();
 133 
 134         setScratchSurface(config);
 135 
 136         // save the state on the native level
 137         rq.ensureCapacity(4);
 138         buf.putInt(SAVE_STATE);
 139         rq.flushNow();
 140     }
 141 
 142     @Override
 143     public void restoreState() {
 144         // assert rq.lock.isHeldByCurrentThread();
 145 
 146         // reset all attributes of this and current contexts
 147         invalidateContext();
 148         invalidateCurrentContext();
 149 
 150         setScratchSurface(config);
 151 
 152         // restore the state on the native level
 153         rq.ensureCapacity(4);
 154         buf.putInt(RESTORE_STATE);
 155         rq.flushNow();
 156     }
 157 
 158     static class OGLContextCaps extends ContextCapabilities {
 159         /**
 160          * Indicates the presence of the GL_EXT_framebuffer_object extension.
 161          * This cap will only be set if the fbobject system property has been
 162          * enabled and we are able to create an FBO with depth buffer.
 163          */
 164         @Native
 165         static final int CAPS_EXT_FBOBJECT     =
 166                 (CAPS_RT_TEXTURE_ALPHA | CAPS_RT_TEXTURE_OPAQUE);



 167         /** Indicates that the context is doublebuffered. */
 168         @Native
 169         static final int CAPS_DOUBLEBUFFERED   = (FIRST_PRIVATE_CAP << 0);
 170         /**
 171          * Indicates the presence of the GL_ARB_fragment_shader extension.
 172          * This cap will only be set if the lcdshader system property has been
 173          * enabled and the hardware supports the minimum number of texture units
 174          */
 175         @Native
 176         static final int CAPS_EXT_LCD_SHADER   = (FIRST_PRIVATE_CAP << 1);
 177         /**
 178          * Indicates the presence of the GL_ARB_fragment_shader extension.
 179          * This cap will only be set if the biopshader system property has been
 180          * enabled and the hardware meets our minimum requirements.
 181          */
 182         @Native
 183         static final int CAPS_EXT_BIOP_SHADER  = (FIRST_PRIVATE_CAP << 2);
 184         /**
 185          * Indicates the presence of the GL_ARB_fragment_shader extension.
 186          * This cap will only be set if the gradshader system property has been
 187          * enabled and the hardware meets our minimum requirements.
 188          */
 189         @Native
 190         static final int CAPS_EXT_GRAD_SHADER  = (FIRST_PRIVATE_CAP << 3);
 191         /** Indicates the presence of the GL_ARB_texture_rectangle extension. */
 192         @Native
 193         static final int CAPS_EXT_TEXRECT      = (FIRST_PRIVATE_CAP << 4);
 194 
 195         OGLContextCaps(int caps, String adapterId) {
 196             super(caps, adapterId);
 197         }
 198 
 199         @Override
 200         public String toString() {
 201             StringBuilder sb = new StringBuilder(super.toString());
 202             if ((caps & CAPS_EXT_FBOBJECT) != 0) {
 203                 sb.append("CAPS_EXT_FBOBJECT|");
 204             }



 205             if ((caps & CAPS_DOUBLEBUFFERED) != 0) {
 206                 sb.append("CAPS_DOUBLEBUFFERED|");
 207             }
 208             if ((caps & CAPS_EXT_LCD_SHADER) != 0) {
 209                 sb.append("CAPS_EXT_LCD_SHADER|");
 210             }
 211             if ((caps & CAPS_EXT_BIOP_SHADER) != 0) {
 212                 sb.append("CAPS_BIOP_SHADER|");
 213             }
 214             if ((caps & CAPS_EXT_GRAD_SHADER) != 0) {
 215                 sb.append("CAPS_EXT_GRAD_SHADER|");
 216             }
 217             if ((caps & CAPS_EXT_TEXRECT) != 0) {
 218                 sb.append("CAPS_EXT_TEXRECT|");
 219             }
 220             return sb.toString();
 221         }
 222     }
 223 }
--- EOF ---