Package cz.fidentis.analyst.glsl.buffers.impl

Class PixelUnpackBufferImpl

java.lang.Object

cz.fidentis.analyst.glsl.buffers.impl.AbstractBuffer

cz.fidentis.analyst.glsl.buffers.impl.PixelUnpackBufferImpl

All Implemented Interfaces:

GlslBuffer, PixelUnpackBuffer

public class PixelUnpackBufferImpl
extends AbstractBuffer
implements PixelUnpackBuffer

A buffer for GL_PIXEL_UNPACK_BUFFER target.

Constructor Summary

Constructors

Constructor	Description
PixelUnpackBufferImpl(BufferDef bufferName, com.jogamp.opengl.GLContext glContext, int usage, long itemSize)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	allocate(long items, boolean reset)	Allocates memory for this buffer on GPU.
void	bind()	Binds this buffer to the OpenGL context (binding points of GPU rendering pipeline), so it become visible for shaders.
long	getItemSize()	This buffer stores some amount of items of the same type (integers, floats, etc.).
int	getUsage()	Returns buffer usage type

Methods inherited from class cz.fidentis.analyst.glsl.buffers.impl.AbstractBuffer

getBindingIndex, getBufferName, getGlName, getGlTarget, glContext, setGlName

Methods inherited from class java.lang.Object

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

Methods inherited from interface cz.fidentis.analyst.glsl.buffers.GlslBuffer

getBindingIndex, getBufferName, getGlName, getGlTarget, glContext

Constructor Details

PixelUnpackBufferImpl

public PixelUnpackBufferImpl(BufferDef bufferName,
 com.jogamp.opengl.GLContext glContext,
 int usage,
 long itemSize)

Constructor.

Parameters:

bufferName - buffer name

glContext - OpenGL context

usage - OpenGL usage type

itemSize - The size of buffer's items

Method Details

bind

public void bind()

Description copied from interface: GlslBuffer

Binds this buffer to the OpenGL context (binding points of GPU rendering pipeline), so it become visible for shaders. Buffers can be bound to their binding points even unallocated. Do not use this method directly. As every buffer should be included in a GlslBufferGroup, use GlslBufferGroup.bindBuffer(cz.fidentis.analyst.glsl.buffers.BufferDef) to bind buffers individually or GlslBufferGroup.bindSsboBuffers() to allocate all SSBO buffers at once.

Specified by:

bind in interface GlslBuffer

getUsage

public int getUsage()

Description copied from interface: PixelUnpackBuffer

Returns buffer usage type

Specified by:

getUsage in interface PixelUnpackBuffer

Returns:

usage type

getItemSize

public long getItemSize()

Description copied from interface: PixelUnpackBuffer

This buffer stores some amount of items of the same type (integers, floats, etc.). Therefore, this method returns the size (number of bytes) of a single item.

Specified by:

getItemSize in interface PixelUnpackBuffer

Returns:

items' size

allocate

public void allocate(long items,
 boolean reset)

Description copied from interface: PixelUnpackBuffer

Allocates memory for this buffer on GPU. Can be used multiple times to resize the buffer. Resulting buffer will occupy items * PixelUnpackBuffer.getItemSize() bytes.

Specified by:

allocate in interface PixelUnpackBuffer

Parameters:

items - how many items are going to be in the buffer (resulting buffer will have items * ssboDef.getItemSize() bytes)

reset - if true, then fills the buffer by zeros