Package org.lwjgl.opengl

Class EXTTextureCompressionRGTC

java.lang.Object
org.lwjgl.opengl.EXTTextureCompressionRGTC
public final class EXTTextureCompressionRGTC extends Object
Native bindings to the EXT_texture_compression_rgtc extension.

This extension introduces four new block-based texture compression formats suited for unsigned and signed red and red-green textures (hence the name "rgtc" for Red-Green Texture Compression).

These formats are designed to reduce the storage requirements and memory bandwidth required for red and red-green textures by a factor of 2-to-1 over conventional uncompressed luminance and luminance-alpha textures with 8-bit components (LUMINANCE8 and LUMINANCE8_ALPHA8).

The compressed signed red-green format is reasonably suited for storing compressed normal maps.

This extension uses the same compression format as the EXT_texture_compression_latc extension except the color data is stored in the red and green components rather than luminance and alpha. Representing compressed red and green components is consistent with the BC4 and BC5 compressed formats supported by DirectX 10.

Requires OpenGL 1.3 or ARB_texture_compression.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    GL_COMPRESSED_RED_GREEN_RGTC2_EXT
    Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.
    static final int
    GL_COMPRESSED_RED_RGTC1_EXT
    Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.
    static final int
    GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT
    Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.
    static final int
    GL_COMPRESSED_SIGNED_RED_RGTC1_EXT
    Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.

  • Method Summary

    Methods inherited from class java.lang.Object

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

  • Field Details

    • GL_COMPRESSED_RED_RGTC1_EXT

      public static final int GL_COMPRESSED_RED_RGTC1_EXT
      Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.
      See Also:

    • GL_COMPRESSED_SIGNED_RED_RGTC1_EXT

      public static final int GL_COMPRESSED_SIGNED_RED_RGTC1_EXT
      Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.
      See Also:

    • GL_COMPRESSED_RED_GREEN_RGTC2_EXT

      public static final int GL_COMPRESSED_RED_GREEN_RGTC2_EXT
      Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.
      See Also:

    • GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT

      public static final int GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT
      Accepted by the internalformat parameter of TexImage2D, CopyTexImage2D, and CompressedTexImage2D and the format parameter of CompressedTexSubImage2D.
      See Also: