Package org.lwjgl.opengl

Class ARBColorBufferFloat

java.lang.Object
org.lwjgl.opengl.ARBColorBufferFloat
public class ARBColorBufferFloat extends Object
Native bindings to the ARB_color_buffer_float extension.

The standard OpenGL pipeline is based on a fixed-point pipeline. While color components are nominally floating-point values in the pipeline, components are frequently clamped to the range [0,1] to accomodate the fixed-point color buffer representation and allow for fixed-point computational hardware.

This extension adds pixel formats or visuals with floating-point RGBA color components and controls for clamping of color components within the pipeline.

For a floating-point RGBA pixel format, the size of each float components is specified using the same attributes that are used for defining the size of fixed-point components. 32-bit floating-point components are in the standard IEEE float format. 16-bit floating-point components have 1 sign bit, 5 exponent bits, and 10 mantissa bits.

Clamping control provides a way to disable certain color clamps and allow programs, and the fixed-function pipeline, to deal in unclamped colors. There are controls to modify clamping of vertex colors, clamping of fragment colors throughout the pipeline, and for pixel return data.

The default state for fragment clamping is FIXED_ONLY_ARB, which has the behavior of clamping colors for fixed-point color buffers and not clamping colors for floating-pont color buffers.

Vertex colors are clamped by default.

Promoted to core in OpenGL 3.0.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    GL_CLAMP_FRAGMENT_COLOR_ARB
    Accepted by the target parameter of ClampColorARB and the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
    static final int
    GL_CLAMP_READ_COLOR_ARB
    Accepted by the target parameter of ClampColorARB and the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
    static final int
    GL_CLAMP_VERTEX_COLOR_ARB
    Accepted by the target parameter of ClampColorARB and the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
    static final int
    GL_FIXED_ONLY_ARB
    Accepted by the clamp parameter of ClampColorARB.
    static final int
    GL_RGBA_FLOAT_MODE_ARB
    Accepted by the pname parameters of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.

  • Method Summary

    Modifier and Type
    Method
    Description
    static void
    glClampColorARB(int target, int clamp)
    Controls color clamping.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • GL_RGBA_FLOAT_MODE_ARB

      public static final int GL_RGBA_FLOAT_MODE_ARB
      Accepted by the pname parameters of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
      See Also:

    • GL_CLAMP_VERTEX_COLOR_ARB

      public static final int GL_CLAMP_VERTEX_COLOR_ARB
      Accepted by the target parameter of ClampColorARB and the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
      See Also:

    • GL_CLAMP_FRAGMENT_COLOR_ARB

      public static final int GL_CLAMP_FRAGMENT_COLOR_ARB
      Accepted by the target parameter of ClampColorARB and the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
      See Also:

    • GL_CLAMP_READ_COLOR_ARB

      public static final int GL_CLAMP_READ_COLOR_ARB
      Accepted by the target parameter of ClampColorARB and the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
      See Also:

    • GL_FIXED_ONLY_ARB

      public static final int GL_FIXED_ONLY_ARB
      Accepted by the clamp parameter of ClampColorARB.
      See Also:

  • Method Details