com.jme3.opencl.lwjgl

Class LwjglContext

java.lang.Object

com.jme3.opencl.AbstractOpenCLObject

com.jme3.opencl.Context

com.jme3.opencl.lwjgl.LwjglContext

All Implemented Interfaces:

OpenCLObject

public class LwjglContext
extends Context

Nested Class Summary

Nested classes/interfaces inherited from interface com.jme3.opencl.OpenCLObject

OpenCLObject.ObjectReleaser

Field Summary

Fields inherited from class com.jme3.opencl.AbstractOpenCLObject

releaser

Constructor Summary

Constructors

Constructor and Description
LwjglContext(org.lwjgl.opencl.CLContext context, java.util.List<LwjglDevice> devices)

Method Summary

Modifier and Type	Method and Description
Image	bindImage(Image image, Texture.Type textureType, int miplevel, MemoryAccess access) Creates a shared image object from a jME3-image.
protected Image	bindPureRenderBuffer(FrameBuffer.RenderBuffer buffer, MemoryAccess access)
Buffer	bindVertexBuffer(VertexBuffer vb, MemoryAccess access) Creates a shared buffer from a VertexBuffer.
Buffer	createBuffer(long size, MemoryAccess access) Allocates a new buffer of the specific size and access type on the device.
Buffer	createBufferFromHost(java.nio.ByteBuffer data, MemoryAccess access) Creates a new buffer wrapping the specific host memory.
Image	createImage(MemoryAccess access, Image.ImageFormat format, Image.ImageDescriptor descr) Creates a new 1D, 2D, 3D image. ImageFormat specifies the element type and order, like RGBA of floats. ImageDescriptor specifies the dimension of the image. Furthermore, a ByteBuffer can be specified in the ImageDescriptor together with row and slice pitches.
Program	createProgramFromBinary(java.nio.ByteBuffer binaries, Device device) Creates a program from the specified binaries.
Program	createProgramFromSourceCode(java.lang.String sourceCode) Creates a program object from the provided source code.
CommandQueue	createQueue(Device device) Creates a command queue sending commands to the specified device.
org.lwjgl.opencl.CLContext	getContext()
java.util.List<LwjglDevice>	getDevices() Returns all available devices for this context.
Image.ImageFormat[]	querySupportedFormats(MemoryAccess access, Image.ImageType type) Queries all supported image formats for a specified memory access and image type.

Methods inherited from class com.jme3.opencl.Context

bindImage, bindImage, bindRenderBuffer, createBuffer, createBufferFromHost, createProgramFromSourceCodeWithDependencies, createProgramFromSourceFiles, createProgramFromSourceFiles, createProgramFromSourceFilesWithInclude, createProgramFromSourceFilesWithInclude, createQueue, register, toString

Methods inherited from class com.jme3.opencl.AbstractOpenCLObject

finalize, getReleaser, release

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LwjglContext

public LwjglContext(org.lwjgl.opencl.CLContext context,
                    java.util.List<LwjglDevice> devices)

Method Detail

getContext

public org.lwjgl.opencl.CLContext getContext()

getDevices

public java.util.List<LwjglDevice> getDevices()

Description copied from class: Context

Returns all available devices for this context. These devices all belong to the same Platform. They are used to create a command queue sending commands to a particular device, see Context.createQueue(com.jme3.opencl.Device). Also, device capabilities, like the supported OpenCL version, extensions, memory size and so on, are queried over the Device instances.
The available devices were specified by a PlatformChooser.

Specified by:

getDevices in class Context

Returns:

a list of devices

createQueue

public CommandQueue createQueue(Device device)

Description copied from class: Context

Creates a command queue sending commands to the specified device. The device must be an entry of Context.getDevices().

Specified by:

createQueue in class Context

Parameters:

device - the target device

Returns:

the command queue

createBuffer

public Buffer createBuffer(long size,
                           MemoryAccess access)

Description copied from class: Context

Allocates a new buffer of the specific size and access type on the device.

Specified by:

createBuffer in class Context

Parameters:

size - the size of the buffer in bytes

access - the allowed access of this buffer from kernel code

Returns:

the new buffer

createBufferFromHost

public Buffer createBufferFromHost(java.nio.ByteBuffer data,
                                   MemoryAccess access)

Description copied from class: Context

Creates a new buffer wrapping the specific host memory. This host memory specified by a ByteBuffer can then be used directly by kernel code, although the access might be slower than with native buffers created by Context.createBuffer(long, com.jme3.opencl.MemoryAccess).

Specified by:

createBufferFromHost in class Context

Parameters:

data - the host buffer to use

access - the allowed access of this buffer from kernel code

Returns:

the new buffer

createImage

public Image createImage(MemoryAccess access,
                         Image.ImageFormat format,
                         Image.ImageDescriptor descr)

Description copied from class: Context

Creates a new 1D, 2D, 3D image.
ImageFormat specifies the element type and order, like RGBA of floats.
ImageDescriptor specifies the dimension of the image.
Furthermore, a ByteBuffer can be specified in the ImageDescriptor together with row and slice pitches. This buffer is then used to store the image. If no ByteBuffer is specified, a new buffer is allocated (this is the normal behaviour).

Specified by:

createImage in class Context

Parameters:

access - the allowed access of this image from kernel code

format - the image format

descr - the image descriptor

Returns:

the new image object

querySupportedFormats

public Image.ImageFormat[] querySupportedFormats(MemoryAccess access,
                                                 Image.ImageType type)

Description copied from class: Context

Queries all supported image formats for a specified memory access and image type.
Note that the returned array may contain ImageFormat objects where ImageChannelType or ImageChannelOrder are null (or both). This is the case when the device supports new formats that are not included in this wrapper yet.

Specified by:

querySupportedFormats in class Context

Parameters:

access - the memory access type

type - the image type (1D, 2D, 3D, ...)

Returns:

an array of all supported image formats

bindVertexBuffer

public Buffer bindVertexBuffer(VertexBuffer vb,
                               MemoryAccess access)

Description copied from class: Context

Creates a shared buffer from a VertexBuffer. The returned buffer and the vertex buffer operate on the same memory, changes in one view are visible in the other view. This can be used to modify meshes directly from OpenCL (e.g. for particle systems).
Note: The vertex buffer must already been uploaded to the GPU, i.e. it must be used at least once for drawing.

Before the returned buffer can be used, it must be acquired explicitly by Buffer.acquireBufferForSharingAsync(com.jme3.opencl.CommandQueue) and after modifying it, released by Buffer.releaseBufferForSharingAsync(com.jme3.opencl.CommandQueue). This is needed so that OpenGL and OpenCL operations do not interfere with each other.

Specified by:

bindVertexBuffer in class Context

Parameters:

vb - the vertex buffer to share

access - the memory access for the kernel

Returns:

the new buffer

bindImage

public Image bindImage(Image image,
                       Texture.Type textureType,
                       int miplevel,
                       MemoryAccess access)

Description copied from class: Context

Creates a shared image object from a jME3-image. The returned image shares the same memory with the jME3-image, changes in one view are visible in the other view. This can be used to modify textures and images directly from OpenCL (e.g. for post processing effects and other texture effects).
Note: The image must already been uploaded to the GPU, i.e. it must be used at least once for drawing.

Before the returned image can be used, it must be acquired explicitly by Image.acquireImageForSharingAsync(com.jme3.opencl.CommandQueue) and after modifying it, released by Image.releaseImageForSharingAsync(com.jme3.opencl.CommandQueue) This is needed so that OpenGL and OpenCL operations do not interfere with each other.

Specified by:

bindImage in class Context

Parameters:

image - the jME3 image object

textureType - the texture type (1D, 2D, 3D), since this is not stored in the image

miplevel - the mipmap level that should be shared

access - the allowed memory access for kernels

Returns:

the OpenCL image

bindPureRenderBuffer

protected Image bindPureRenderBuffer(FrameBuffer.RenderBuffer buffer,
                                     MemoryAccess access)

Specified by:

bindPureRenderBuffer in class Context

createProgramFromSourceCode

public Program createProgramFromSourceCode(java.lang.String sourceCode)

Description copied from class: Context

Creates a program object from the provided source code. The program still needs to be compiled using Program.build().

Specified by:

createProgramFromSourceCode in class Context

Parameters:

sourceCode - the source code

Returns:

the program object

createProgramFromBinary

public Program createProgramFromBinary(java.nio.ByteBuffer binaries,
                                       Device device)

Description copied from class: Context

Creates a program from the specified binaries. The binaries are created by Program.getBinary(com.jme3.opencl.Device). The returned program still needs to be build using Program.build(java.lang.String, com.jme3.opencl.Device...). Important:The device passed to Program.getBinary(..), this method and Program#build(..) must be the same. The binaries are used to build a program cache across multiple launches of the application. The programs build much faster from binaries than from sources.

Specified by:

createProgramFromBinary in class Context

Parameters:

binaries - the binaries

device - the device to use

Returns:

the new program