Package org.lwjgl.opengl

Class EXTFramebufferSRGB


  • public final class EXTFramebufferSRGB
extends java.lang.Object
    Native bindings to the EXT_framebuffer_sRGB extension.

    Conventionally, OpenGL assumes framebuffer color components are stored in a linear color space. In particular, framebuffer blending is a linear operation.

    The sRGB color space is based on typical (non-linear) monitor characteristics expected in a dimly lit office. It has been standardized by the International Electrotechnical Commission (IEC) as IEC 61966-2-1. The sRGB color space roughly corresponds to 2.2 gamma correction.

    This extension adds a framebuffer capability for sRGB framebuffer update and blending. When blending is disabled but the new sRGB updated mode is enabled (assume the framebuffer supports the capability), high-precision linear color component values for red, green, and blue generated by fragment coloring are encoded for sRGB prior to being written into the framebuffer. When blending is enabled along with the new sRGB update mode, red, green, and blue framebuffer color components are treated as sRGB values that are converted to linear color values, blended with the high-precision color values generated by fragment coloring, and then the blend result is encoded for sRGB just prior to being written into the framebuffer.

    The primary motivation for this extension is that it allows OpenGL applications to render into a framebuffer that is scanned to a monitor configured to assume framebuffer color values are sRGB encoded. This assumption is roughly true of most PC monitors with default gamma correction. This allows applications to achieve faithful color reproduction for OpenGL rendering without adjusting the monitor's gamma correction.

    Promoted to core in OpenGL 3.0.

    • Field Summary

      Fields 
      Modifier and Type Field and Description
      static int GL_FRAMEBUFFER_SRGB_CAPABLE_EXT
      Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
      static int GL_FRAMEBUFFER_SRGB_EXT
      Accepted by the cap parameter of Enable, Disable, and IsEnabled, and by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.

    • Method Summary

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • GL_FRAMEBUFFER_SRGB_EXT

        public static final int GL_FRAMEBUFFER_SRGB_EXT
        Accepted by the cap parameter of Enable, Disable, and IsEnabled, and by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
        See Also:
        Constant Field Values

      • GL_FRAMEBUFFER_SRGB_CAPABLE_EXT

        public static final int GL_FRAMEBUFFER_SRGB_CAPABLE_EXT
        Accepted by the pname parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev.
        See Also:
        Constant Field Values