Package org.lwjgl.opengles

Class EXTTextureRG

java.lang.Object
org.lwjgl.opengles.EXTTextureRG
public final class EXTTextureRG extends 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
    Description
    static final int
    GL_R8_EXT
    Accepted by the internalformat parameter of RenderbufferStorage and RenderbufferStorageMultisampleAPPLE.
    static final int
    GL_RED_EXT
    Accepted by the internalformat parameter of TexImage2D and CopyTexImage2D, and the format parameter of TexImage2D, TexSubImage2D, and ReadPixels.
    static final int
    GL_RG_EXT
    Accepted by the internalformat parameter of TexImage2D and CopyTexImage2D, and the format parameter of TexImage2D, TexSubImage2D, and ReadPixels.
    static final 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 Details

    • 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:

    • 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:

    • GL_R8_EXT

      public static final int GL_R8_EXT
      Accepted by the internalformat parameter of RenderbufferStorage and RenderbufferStorageMultisampleAPPLE.
      See Also:

    • GL_RG8_EXT

      public static final int GL_RG8_EXT
      Accepted by the internalformat parameter of RenderbufferStorage and RenderbufferStorageMultisampleAPPLE.
      See Also: