Add ability to access newer CLImpl versions for devices

Added a CLPlatform method to return a CLImpl version specific to a
device. This lets the user get a CLImpl12 or CLImpl20 instance which
they could then cast to the right type and use to access newer CL
functions than those in the default CLImpl11 object.

4 files changed, 39 insertions, 3 deletions

diff --git a/src/com/jogamp/opencl/CLPlatform.java b/src/com/jogamp/opencl/CLPlatform.java
index f0faa0fb..11a562c5 100644
--- a/src/com/jogamp/opencl/CLPlatform.java
+++ b/src/com/jogamp/opencl/CLPlatform.java
@@ -47,7 +47,10 @@ import com.jogamp.opencl.llb.CLMemObjBinding;
 import com.jogamp.opencl.spi.CLPlatformInfoAccessor;
 import com.jogamp.opencl.util.CLUtil;
 import com.jogamp.opencl.llb.impl.CLImpl11;
+import com.jogamp.opencl.llb.impl.CLImpl12;
+import com.jogamp.opencl.llb.impl.CLImpl20;
 import com.jogamp.opencl.spi.CLAccessorFactory;
+import com.jogamp.opencl.spi.CLInfoAccessor;
 import com.jogamp.opencl.util.Filter;
 
 import java.nio.IntBuffer;
@@ -248,7 +251,7 @@ public class CLPlatform {
     }
 
     /**
-     * Returns the low level binding interface to the OpenCL APIs.
+     * Returns the low level binding interface to the OpenCL APIs. This interface is always for OpenCL 1.1.
      */
     public static CL getLowLevelCLInterface() {
         initialize();
@@ -256,6 +259,25 @@ public class CLPlatform {
     }
 
     /**
+     * Returns the low level binding interface to the OpenCL APIs for the specified device. This interface
+     * is the newest one the device supports.
+     */
+    public static CL getLowLevelCLInterfaceForDevice(final long device) {
+        initialize();
+        
+        CLInfoAccessor deviceInfo = defaultFactory.createDeviceInfoAccessor(cl, device);
+        CLVersion version = new CLVersion(deviceInfo.getString(CL_DEVICE_VERSION));
+
+        if(version.isEqual(CLVersion.CL_1_2))
+        	return new CLImpl12();
+
+        if(version.isEqual(CLVersion.CL_2_0))
+        	return new CLImpl20();
+
+        return cl;
+    }
+
+    /**
      * Hint to allow the implementation to release the resources allocated by the OpenCL compiler.
      * Calls to {@link CLProgram#build()} after unloadCompiler will reload the compiler if necessary.
      */
diff --git a/src/com/jogamp/opencl/CLVersion.java b/src/com/jogamp/opencl/CLVersion.java
index 3a48f0b7..fc2419c7 100644
--- a/src/com/jogamp/opencl/CLVersion.java
+++ b/src/com/jogamp/opencl/CLVersion.java
@@ -45,6 +45,9 @@ public class CLVersion implements Comparable<CLVersion> {
 
     public final static CLVersion CL_1_0 = new CLVersion("OpenCL 1.0");
     public final static CLVersion CL_1_1 = new CLVersion("OpenCL 1.1");
+    public final static CLVersion CL_1_2 = new CLVersion("OpenCL 1.2");
+    public final static CLVersion CL_2_0 = new CLVersion("OpenCL 2.0");
+    public final static CLVersion CL_2_1 = new CLVersion("OpenCL 2.1");
 
     /**
      * The full version String is defined as:
diff --git a/src/com/jogamp/opencl/util/CLInfo.java b/src/com/jogamp/opencl/util/CLInfo.java
index e6d55b58..cd97d6e2 100644
--- a/src/com/jogamp/opencl/util/CLInfo.java
+++ b/src/com/jogamp/opencl/util/CLInfo.java
@@ -58,7 +58,7 @@ public class CLInfo {
 
         // binding
         sb.append("CL_BINDING_UNAVAILABLE_FUNCTIONS: ");
-        sb.append(((CLImpl11) CLPlatform.getLowLevelCLInterface()).getAddressTable().getNullPointerFunctions());
+        sb.append(CLImpl11.getAddressTable().getNullPointerFunctions());
         sb.append("\n");
 
         // OpenCL
diff --git a/test/com/jogamp/opencl/LowLevelBindingTest.java b/test/com/jogamp/opencl/LowLevelBindingTest.java
index 84aaa73e..39482aa2 100644
--- a/test/com/jogamp/opencl/LowLevelBindingTest.java
+++ b/test/com/jogamp/opencl/LowLevelBindingTest.java
@@ -32,6 +32,8 @@ import java.util.Random;
 
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.opencl.llb.impl.BuildProgramCallback;
+import com.jogamp.opencl.llb.impl.CLImpl12;
+import com.jogamp.opencl.llb.impl.CLImpl20;
 import com.jogamp.opencl.llb.CL;
 import com.jogamp.opencl.llb.CLContextBinding;
 import com.jogamp.opencl.llb.CLDeviceBinding;
@@ -166,7 +168,16 @@ public class LowLevelBindingTest extends UITestCase {
                 checkForError(ret);
                 out.println("    device: " + clString2JavaString(bb, (int)longBuffer.get(0)));
 
-                ret = cl.clGetDeviceInfo(device, CLDeviceBinding.CL_DEVICE_TYPE, bb.capacity(), bb, longBuffer);
+                // get the CL interface with version specific to this device
+                CL deviceInterface = CLPlatform.getLowLevelCLInterfaceForDevice(device);
+                if(deviceInterface instanceof CLImpl12)
+                    out.println("    CL impl: 1.2");
+                else if(deviceInterface instanceof CLImpl20)
+                    out.println("    CL impl: 2.0");
+                else
+                    out.println("    CL impl: 1.1");
+                
+                ret = deviceInterface.clGetDeviceInfo(device, CLDeviceBinding.CL_DEVICE_TYPE, bb.capacity(), bb, longBuffer);
                 checkForError(ret);
                 out.println("    type: " + CLDevice.Type.valueOf(bb.get()));
                 bb.rewind();