Package org.lwjgl.opengl

Class EXTTextureSharedExponent

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

Existing texture formats provide either fixed-point formats with limited range and precision but with compact encodings (allowing 32 or fewer bits per multi-component texel), or floating-point formats with tremendous range and precision but without compact encodings (typically 16 or 32 bits per component).

This extension adds a new packed format and new internal texture format for encoding 3-component vectors (typically RGB colors) with a single 5-bit exponent (biased up by 15) and three 9-bit mantissas for each respective component. There is no sign bit so all three components must be non-negative. The fractional mantissas are stored without an implied 1 to the left of the decimal point. Neither infinity nor not-a-number (NaN) are representable in this shared exponent format.

This 32 bits/texel shared exponent format is particularly well-suited to high dynamic range (HDR) applications where light intensity is typically stored as non-negative red, green, and blue components with considerable range.

Promoted to core in OpenGL 3.0.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    GL_RGB9_E5_EXT
    Accepted by the internalformat parameter of TexImage1D, TexImage2D, TexImage3D, CopyTexImage1D, CopyTexImage2D, and RenderbufferStorageEXT.
    static final int
    GL_TEXTURE_SHARED_SIZE_EXT
    Accepted by the pname parameter of GetTexLevelParameterfv and GetTexLevelParameteriv.
    static final int
    GL_UNSIGNED_INT_5_9_9_9_REV_EXT
    Accepted by the type parameter of DrawPixels, ReadPixels, TexImage1D, TexImage2D, GetTexImage, TexImage3D, TexSubImage1D, TexSubImage2D, TexSubImage3D, GetHistogram, GetMinmax, ConvolutionFilter1D, ConvolutionFilter2D, ConvolutionFilter3D, GetConvolutionFilter, SeparableFilter2D, GetSeparableFilter, ColorTable, ColorSubTable, and GetColorTable.

  • Method Summary

    Methods inherited from class java.lang.Object

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

  • Field Details

    • GL_RGB9_E5_EXT

      public static final int GL_RGB9_E5_EXT
      Accepted by the internalformat parameter of TexImage1D, TexImage2D, TexImage3D, CopyTexImage1D, CopyTexImage2D, and RenderbufferStorageEXT.
      See Also:

    • GL_UNSIGNED_INT_5_9_9_9_REV_EXT

      public static final int GL_UNSIGNED_INT_5_9_9_9_REV_EXT
      Accepted by the type parameter of DrawPixels, ReadPixels, TexImage1D, TexImage2D, GetTexImage, TexImage3D, TexSubImage1D, TexSubImage2D, TexSubImage3D, GetHistogram, GetMinmax, ConvolutionFilter1D, ConvolutionFilter2D, ConvolutionFilter3D, GetConvolutionFilter, SeparableFilter2D, GetSeparableFilter, ColorTable, ColorSubTable, and GetColorTable.
      See Also:

    • GL_TEXTURE_SHARED_SIZE_EXT

      public static final int GL_TEXTURE_SHARED_SIZE_EXT
      Accepted by the pname parameter of GetTexLevelParameterfv and GetTexLevelParameteriv.
      See Also: