1 /*

     2  * Copyright (c) 2019, 2019, 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.metal;

    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 MetalContext extends BufferedContext {

    42 

    43     private final MetalGraphicsConfig config;

    44 

    45     MetalContext(RenderQueue rq, MetalGraphicsConfig config) {

    46         super(rq);

    47         this.config = config;

    48     }

    49 

    50     static void setScratchSurface(MetalGraphicsConfig gc) {

    51         setScratchSurface(gc.getNativeConfigInfo());

    52     }

    53  

    54     /**

    55      * Makes the given GraphicsConfig's context current to its associated

    56      * "scratch surface".  Each GraphicsConfig maintains a native context

    57      * (GLXContext on Unix, HGLRC on Windows) as well as a native pbuffer

    58      * known as the "scratch surface".  By making the context current to the

    59      * scratch surface, we are assured that we have a current context for

    60      * the relevant GraphicsConfig, and can therefore perform operations

    61      * depending on the capabilities of that GraphicsConfig.  For example,

    62      * if the GraphicsConfig supports the GL_ARB_texture_non_power_of_two

    63      * extension, then we should be able to make a non-pow2 texture for this

    64      * GraphicsConfig once we make the context current to the scratch surface.

    65      *

    66      * This method should be used for operations with an OpenGL texture

    67      * as the destination surface (e.g. a sw->texture blit loop), or in those

    68      * situations where we may not otherwise have a current context (e.g.

    69      * when disposing a texture-based surface).

    70      */

    71     static void setScratchSurface(long pConfigInfo) {

    72         // assert OGLRenderQueue.getInstance().lock.isHeldByCurrentThread();

    73 

    74         // invalidate the current context

    75         currentContext = null;

    76 

    77         // set the scratch context

    78         MetalRenderQueue rq = MetalRenderQueue.getInstance();

    79         RenderBuffer buf = rq.getBuffer();

    80         rq.ensureCapacityAndAlignment(12, 4);

    81         buf.putInt(SET_SCRATCH_SURFACE);

    82         buf.putLong(pConfigInfo);

    83     }

    84 

    85     /**

    86      * Invalidates the currentContext field to ensure that we properly

    87      * revalidate the OGLContext (make it current, etc.) next time through

    88      * the validate() method.  This is typically invoked from methods

    89      * that affect the current context state (e.g. disposing a context or

    90      * surface).

    91      */

    92     static void invalidateCurrentContext() {

    93         // assert OGLRenderQueue.getInstance().lock.isHeldByCurrentThread();

    94 

    95         // invalidate the current Java-level context so that we

    96         // revalidate everything the next time around

    97         if (currentContext != null) {

    98             currentContext.invalidateContext();

    99             currentContext = null;

   100         }

   101 

   102         // invalidate the context reference at the native level, and

   103         // then flush the queue so that we have no pending operations

   104         // dependent on the current context

   105         MetalRenderQueue rq = MetalRenderQueue.getInstance();

   106         rq.ensureCapacity(4);

   107         rq.getBuffer().putInt(INVALIDATE_CONTEXT);

   108         rq.flushNow();

   109     }

   110 

   111     public RenderQueue getRenderQueue() {

   112         return MetalRenderQueue.getInstance();

   113     }

   114 

   115     /**

   116      * Returns a string representing adapter id (vendor, renderer, version).

   117      * Must be called on the rendering thread.

   118      *

   119      * @return an id string for the adapter

   120      */

   121     //static final native String getOGLIdString();

   122 

   123     @Override

   124     public void saveState() {

   125         // assert rq.lock.isHeldByCurrentThread();

   126 

   127         // reset all attributes of this and current contexts

   128         invalidateContext();

   129         invalidateCurrentContext();

   130 

   131         setScratchSurface(config);

   132 

   133         // save the state on the native level

   134         rq.ensureCapacity(4);

   135         buf.putInt(SAVE_STATE);

   136         rq.flushNow();

   137     }

   138 

   139     @Override

   140     public void restoreState() {

   141         // assert rq.lock.isHeldByCurrentThread();

   142 

   143         // reset all attributes of this and current contexts

   144         invalidateContext();

   145         invalidateCurrentContext();

   146 

   147         setScratchSurface(config);

   148 

   149         // restore the state on the native level

   150         rq.ensureCapacity(4);

   151         buf.putInt(RESTORE_STATE);

   152         rq.flushNow();

   153     }

   154 

   155     //static class OGLContextCaps extends ContextCapabilities {

   156         /**

   157          * Indicates the presence of the GL_EXT_framebuffer_object extension.

   158          * This cap will only be set if the fbobject system property has been

   159          * enabled and we are able to create an FBO with depth buffer.

   160          */

   161     //  @Native

   162     // static final int CAPS_EXT_FBOBJECT     =

   163     //            (CAPS_RT_TEXTURE_ALPHA | CAPS_RT_TEXTURE_OPAQUE);

   164         /** Indicates that the context is doublebuffered. */

   165     //    @Native

   166     //    static final int CAPS_DOUBLEBUFFERED   = (FIRST_PRIVATE_CAP << 0);

   167         /**

   168          * Indicates the presence of the GL_ARB_fragment_shader extension.

   169          * This cap will only be set if the lcdshader system property has been

   170          * enabled and the hardware supports the minimum number of texture units

   171          */

   172     //    @Native

   173     //    static final int CAPS_EXT_LCD_SHADER   = (FIRST_PRIVATE_CAP << 1);

   174         /**

   175          * Indicates the presence of the GL_ARB_fragment_shader extension.

   176          * This cap will only be set if the biopshader system property has been

   177          * enabled and the hardware meets our minimum requirements.

   178          */

   179     //    @Native

   180     //    static final int CAPS_EXT_BIOP_SHADER  = (FIRST_PRIVATE_CAP << 2);

   181         /**

   182          * Indicates the presence of the GL_ARB_fragment_shader extension.

   183          * This cap will only be set if the gradshader system property has been

   184          * enabled and the hardware meets our minimum requirements.

   185          */

   186     //    @Native

   187     //    static final int CAPS_EXT_GRAD_SHADER  = (FIRST_PRIVATE_CAP << 3);

   188         /** Indicates the presence of the GL_ARB_texture_rectangle extension. */

   189     //    @Native

   190     //    static final int CAPS_EXT_TEXRECT      = (FIRST_PRIVATE_CAP << 4);

   191         /** Indicates the presence of the GL_NV_texture_barrier extension. */

   192     //    @Native

   193     //    static final int CAPS_EXT_TEXBARRIER = (FIRST_PRIVATE_CAP << 5);

   194 

   195 

   196     /*    OGLContextCaps(int caps, String adapterId) {

   197             super(caps, adapterId);

   198         }

   199 

   200         @Override

   201         public String toString() {

   202             StringBuilder sb = new StringBuilder(super.toString());

   203             if ((caps & CAPS_EXT_FBOBJECT) != 0) {

   204                 sb.append("CAPS_EXT_FBOBJECT|");

   205             }

   206             if ((caps & CAPS_DOUBLEBUFFERED) != 0) {

   207                 sb.append("CAPS_DOUBLEBUFFERED|");

   208             }

   209             if ((caps & CAPS_EXT_LCD_SHADER) != 0) {

   210                 sb.append("CAPS_EXT_LCD_SHADER|");

   211             }

   212             if ((caps & CAPS_EXT_BIOP_SHADER) != 0) {

   213                 sb.append("CAPS_BIOP_SHADER|");

   214             }

   215             if ((caps & CAPS_EXT_GRAD_SHADER) != 0) {

   216                 sb.append("CAPS_EXT_GRAD_SHADER|");

   217             }

   218             if ((caps & CAPS_EXT_TEXRECT) != 0) {

   219                 sb.append("CAPS_EXT_TEXRECT|");

   220             }

   221             if ((caps & CAPS_EXT_TEXBARRIER) != 0) {

   222                 sb.append("CAPS_EXT_TEXBARRIER|");

   223             }

   224             return sb.toString();

   225         }

   226     }*/

   227 }