Package org.lwjgl.opengl

Class ARBTextureView

java.lang.Object

org.lwjgl.opengl.ARBTextureView

public class ARBTextureView
extends java.lang.Object

Native bindings to the ARB_texture_view extension.

This extension allows a texture's data store to be "viewed" in multiple ways, either reinterpreting the data format/type as a different format/type with the same element size, or by clamping the mipmap level range or array slice range.

The goals of this extension are to avoid having these alternate views become shared mutable containers of shared mutable objects, and to add the views to the API in a minimally invasive way.

No new object types are added. Conceptually, a texture object is split into the following parts:

• A data store holding texel data.
• State describing which portions of the data store to use, and how to interpret the data elements.
• An embedded sampler object.
• Various other texture parameters.

With this extension, multiple textures can share a data store and have different state describing which portions of the data store to use and how to interpret the data elements. The data store is refcounted and not destroyed until the last texture sharing it is deleted.

This extension leverages the ARB_texture_storage concept of an "immutable texture". Views can only be created of textures created with TexStorage.

Requires OpenGL 4.2 or ARB_texture_storage. Promoted to core in OpenGL 4.3.

Field Summary

Fields

Modifier and Type	Field	Description
static int	GL_TEXTURE_IMMUTABLE_LEVELS GL_TEXTURE_VIEW_MIN_LAYER GL_TEXTURE_VIEW_MIN_LEVEL GL_TEXTURE_VIEW_NUM_LAYERS GL_TEXTURE_VIEW_NUM_LEVELS	Accepted by the pname parameters of GetTexParameterfv and GetTexParameteriv.

Method Summary

Modifier and Type	Method	Description
static void	glTextureView(int texture, int target, int origtexture, int internalformat, int minlevel, int numlevels, int minlayer, int numlayers)	Initializes a texture as a data alias of another texture's data store.

Methods inherited from class java.lang.Object

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

Field Detail

GL_TEXTURE_VIEW_MIN_LEVEL, GL_TEXTURE_VIEW_NUM_LEVELS, GL_TEXTURE_VIEW_MIN_LAYER, GL_TEXTURE_VIEW_NUM_LAYERS, GL_TEXTURE_IMMUTABLE_LEVELS

Accepted by the pname parameters of GetTexParameterfv and GetTexParameteriv.

Method Detail

glTextureView

public static void glTextureView(int texture,
                                 int target,
                                 int origtexture,
                                 int internalformat,
                                 int minlevel,
                                 int numlevels,
                                 int minlayer,
                                 int numlayers)

Initializes a texture as a data alias of another texture's data store.

Parameters:

texture - the texture object to be initialized as a view

target - the target to be used for the newly initialized texture

origtexture - the name of a texture object of which to make a view

internalformat - the internal format for the newly created view

minlevel - the lowest level of detail of the view

numlevels - the number of levels of detail to include in the view

minlayer - the index of the first layer to include in the view

numlayers - the number of layers to include in the view