org.lwjgl.opengles

Class EXTTextureRG

java.lang.Object

org.lwjgl.opengles.EXTTextureRG

public final class EXTTextureRG
extends java.lang.Object

Native bindings to the EXT_texture_rg extension.

Historically one- and two-component textures have been specified in OpenGL ES using the luminance or luminance-alpha (L/LA) formats. With the advent of programmable shaders and render-to-texture capabilities these legacy formats carry some historical artifacts which are no longer useful.

For example, when sampling from such textures, the luminance values are replicated across the color components. This is no longer necessary with programmable shaders.

It is also desirable to be able to render to one- and two-component format textures using capabilities such as framebuffer objects (FBO), but rendering to L/LA formats is under-specified (specifically how to map R/G/B/A values to L/A texture channels).

This extension adds new base internal formats for one-component RED and two-component RG (red green) textures as well as sized RED and RG internal formats for renderbuffers. The RED and RG texture formats can be used for both texturing and rendering into with framebuffer objects.

Requires GLES 2.0.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GL_R8_EXT Accepted by the internalformat parameter of RenderbufferStorage and RenderbufferStorageMultisampleAPPLE.
static int	GL_RED_EXT Accepted by the internalformat parameter of TexImage2D and CopyTexImage2D, and the format parameter of TexImage2D, TexSubImage2D, and ReadPixels.
static int	GL_RG_EXT Accepted by the internalformat parameter of TexImage2D and CopyTexImage2D, and the format parameter of TexImage2D, TexSubImage2D, and ReadPixels.
static int	GL_RG8_EXT Accepted by the internalformat parameter of RenderbufferStorage and RenderbufferStorageMultisampleAPPLE.

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

GL_RED_EXT

public static final int GL_RED_EXT

Accepted by the internalformat parameter of TexImage2D and CopyTexImage2D, and the format parameter of TexImage2D, TexSubImage2D, and ReadPixels.

See Also:

Constant Field Values

GL_RG_EXT

public static final int GL_RG_EXT

Accepted by the internalformat parameter of TexImage2D and CopyTexImage2D, and the format parameter of TexImage2D, TexSubImage2D, and ReadPixels.

See Also:

Constant Field Values

GL_R8_EXT

public static final int GL_R8_EXT

Accepted by the internalformat parameter of RenderbufferStorage and RenderbufferStorageMultisampleAPPLE.

See Also:

Constant Field Values

GL_RG8_EXT

public static final int GL_RG8_EXT

Accepted by the internalformat parameter of RenderbufferStorage and RenderbufferStorageMultisampleAPPLE.

See Also:

Constant Field Values