org.lwjgl.opengl

Class EXTTextureSharedExponent

java.lang.Object

org.lwjgl.opengl.EXTTextureSharedExponent

public final class EXTTextureSharedExponent
extends java.lang.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 and Description
static int	GL_RGB9_E5_EXT Accepted by the internalformat parameter of TexImage1D, TexImage2D, TexImage3D, CopyTexImage1D, CopyTexImage2D, and RenderbufferStorageEXT.
static int	GL_TEXTURE_SHARED_SIZE_EXT Accepted by the pname parameter of GetTexLevelParameterfv and GetTexLevelParameteriv.
static 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 Detail

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:

Constant Field Values

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:

Constant Field Values

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:

Constant Field Values