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:
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. or ARB_texture_storage. Promoted to core in OpenGL 4..
| Modifier and Type | Field and Description |
|---|---|
| public static final int | GL_TEXTURE_IMMUTABLE_LEVELS
Accepted by the |
| public static final int | GL_TEXTURE_VIEW_MIN_LAYER
Accepted by the |
| public static final int | GL_TEXTURE_VIEW_MIN_LEVEL
Accepted by the |
| public static final int | GL_TEXTURE_VIEW_NUM_LAYERS
Accepted by the |
| public static final int | GL_TEXTURE_VIEW_NUM_LEVELS
Accepted by the |
| Access | Constructor and Description |
|---|---|
| protected |
| Modifier and Type | Method and Description |
|---|---|
| public static void | glTextureView(int
the texture object to be initialized as a view texture, int the target to be used for the newly initialized texture target, int the name of a texture object of which to make a view origtexture, int the internal format for the newly created view internalformat, int the lowest level of detail of the view minlevel, int the number of levels of detail to include in the view numlevels, int the index of the first layer to include in the view minlayer, int the number of layers to include in the view numlayers)Initializes a texture as a data alias of another texture's data store. |
| GL_TEXTURE_IMMUTABLE_LEVELS | back to summary |
|---|---|
| public static final int GL_TEXTURE_IMMUTABLE_LEVELS Accepted by the | |
| GL_TEXTURE_VIEW_MIN_LAYER | back to summary |
|---|---|
| public static final int GL_TEXTURE_VIEW_MIN_LAYER Accepted by the | |
| GL_TEXTURE_VIEW_MIN_LEVEL | back to summary |
|---|---|
| public static final int GL_TEXTURE_VIEW_MIN_LEVEL Accepted by the | |
| GL_TEXTURE_VIEW_NUM_LAYERS | back to summary |
|---|---|
| public static final int GL_TEXTURE_VIEW_NUM_LAYERS Accepted by the | |
| GL_TEXTURE_VIEW_NUM_LEVELS | back to summary |
|---|---|
| public static final int GL_TEXTURE_VIEW_NUM_LEVELS Accepted by the | |
| ARBTextureView | back to summary |
|---|---|
| protected ARBTextureView() | |
| glTextureView | back to summary |
|---|---|
| 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.
| |