public class OESTextureBuffer
extends java.lang.Object
This extension provides a new texture type, called a buffer texture. Buffer textures are one-dimensional arrays of texels whose storage comes from an attached buffer object. When a buffer object is bound to a buffer texture, a format is specified, and the data in the buffer object is treated as an array of texels of the specified format.
The use of a buffer object to provide storage allows the texture data to be specified in a number of different ways: via buffer object loads (BufferData), direct CPU writes (MapBuffer), or framebuffer readbacks to pixel buffer objects (ReadPixels). A buffer object can also be loaded by transform feedback, which captures selected transformed attributes of vertices processed by the GL. Several of these mechanisms do not require an extra data copy, which would be required when using conventional TexImage-like entry points.
Buffer textures do not support mipmapping, texture lookups with normalized floating-point texture coordinates, and texture filtering of any sort. They can be accessed via single texel fetch operations in programmable shaders, using a new sampler type and texel fetch function, and access can be controlled using the same memory barrier operations as for other texture types.
Buffer textures are treated as (potentially large) one-dimensional textures; the maximum texture size supported for buffer textures in the initial implementation of this extension is 227 texels (note that this extension only guarantees support for buffer textures with 216 texels, but we expect most implementations to exceed that substantially). When a buffer object is attached to a buffer texture, a size is not specified; rather, the number of texels in the texture is taken by dividing the size of the buffer object by the size of each texel.
This extension also allows a sub-range of the buffer's data store to be attached to a texture. This can be used, for example, to allow multiple buffer textures to be backed by independent sub-ranges of the same buffer object, or for different sub-ranges of a single buffer object to be used for different purposes.
Requires GLES 3.1.
| Modifier and Type | Field and Description |
|---|---|
static int |
GL_IMAGE_BUFFER_OES
(note that this token name is an alias for TEXTURE_BUFFER_OES, and is used for naming consistency with queries for the buffers bound to other buffer
binding points).
|
static int |
GL_INT_IMAGE_BUFFER_OES
(note that this token name is an alias for TEXTURE_BUFFER_OES, and is used for naming consistency with queries for the buffers bound to other buffer
binding points).
|
static int |
GL_INT_SAMPLER_BUFFER_OES
(note that this token name is an alias for TEXTURE_BUFFER_OES, and is used for naming consistency with queries for the buffers bound to other buffer
binding points).
|
static int |
GL_SAMPLER_BUFFER_OES
(note that this token name is an alias for TEXTURE_BUFFER_OES, and is used for naming consistency with queries for the buffers bound to other buffer
binding points).
|
static int |
GL_TEXTURE_BUFFER_BINDING_OES
Accepted by the
pname parameters of GetBooleanv, GetFloatv, and GetIntegerv. |
static int |
GL_TEXTURE_BUFFER_DATA_STORE_BINDING_OES
Accepted by the
pname parameter of GetTexLevelParameter. |
static int |
GL_TEXTURE_BUFFER_OES
Accepted by the
target parameter of BindBuffer, BufferData, BufferSubData, MapBufferRange, BindTexture, UnmapBuffer, GetBufferParameteriv,
GetBufferPointerv, TexBufferOES, and TexBufferRangeOES. |
static int |
GL_TEXTURE_BUFFER_OFFSET_OES
Accepted by the
pname parameter of GetTexLevelParameter. |
static int |
GL_TEXTURE_BUFFER_SIZE_OES
Accepted by the
pname parameter of GetTexLevelParameter. |
static int |
GL_UNSIGNED_INT_IMAGE_BUFFER_OES
(note that this token name is an alias for TEXTURE_BUFFER_OES, and is used for naming consistency with queries for the buffers bound to other buffer
binding points).
|
static int |
GL_UNSIGNED_INT_SAMPLER_BUFFER_OES
(note that this token name is an alias for TEXTURE_BUFFER_OES, and is used for naming consistency with queries for the buffers bound to other buffer
binding points).
|
| Modifier and Type | Method and Description |
|---|---|
static void |
glTexBufferOES(int target,
int internalformat,
int buffer) |
static void |
glTexBufferRangeOES(int target,
int internalformat,
int buffer,
long offset,
long size) |
public static final int GL_TEXTURE_BUFFER_OES
target parameter of BindBuffer, BufferData, BufferSubData, MapBufferRange, BindTexture, UnmapBuffer, GetBufferParameteriv,
GetBufferPointerv, TexBufferOES, and TexBufferRangeOES.public static final int GL_TEXTURE_BUFFER_BINDING_OES
pname parameters of GetBooleanv, GetFloatv, and GetIntegerv.public static final int GL_SAMPLER_BUFFER_OES
type parameter of GetActiveUniform, the params parameter of GetActiveUniformsiv, and the params parameter of
GetProgramResourceiv when the TYPE property is queried on the UNIFORM interface.public static final int GL_INT_SAMPLER_BUFFER_OES
type parameter of GetActiveUniform, the params parameter of GetActiveUniformsiv, and the params parameter of
GetProgramResourceiv when the TYPE property is queried on the UNIFORM interface.public static final int GL_UNSIGNED_INT_SAMPLER_BUFFER_OES
type parameter of GetActiveUniform, the params parameter of GetActiveUniformsiv, and the params parameter of
GetProgramResourceiv when the TYPE property is queried on the UNIFORM interface.public static final int GL_IMAGE_BUFFER_OES
type parameter of GetActiveUniform, the params parameter of GetActiveUniformsiv, and the params parameter of
GetProgramResourceiv when the TYPE property is queried on the UNIFORM interface.public static final int GL_INT_IMAGE_BUFFER_OES
type parameter of GetActiveUniform, the params parameter of GetActiveUniformsiv, and the params parameter of
GetProgramResourceiv when the TYPE property is queried on the UNIFORM interface.public static final int GL_UNSIGNED_INT_IMAGE_BUFFER_OES
type parameter of GetActiveUniform, the params parameter of GetActiveUniformsiv, and the params parameter of
GetProgramResourceiv when the TYPE property is queried on the UNIFORM interface.public static final int GL_TEXTURE_BUFFER_DATA_STORE_BINDING_OES
pname parameter of GetTexLevelParameter.public static final int GL_TEXTURE_BUFFER_OFFSET_OES
pname parameter of GetTexLevelParameter.public static final int GL_TEXTURE_BUFFER_SIZE_OES
pname parameter of GetTexLevelParameter.Copyright LWJGL. All Rights Reserved. License terms.