glHistogramEXT()
glEnable
( GL_HISTOGRAM_EXT )
glGetHistogramEXT()
![[Histogram]](/file/12033/SGI Developer Toolbox 6.1 - Disc 1.iso/toolbox/src/tutorials/OGLT/Rendering/gif/IE_H.gif)
glHistogramEXT()
glEnable
( GL_HISTOGRAM_EXT )
glGetHistogramEXT()
width = 2n =
8
internal_format =
GL_LUMINANCE4_ALPHA4_EXT
sink =
TRUE/FALSE
![[Formula]](/file/12033/SGI Developer Toolbox 6.1 - Disc 1.iso/toolbox/src/tutorials/OGLT/Rendering/gif/IE_H_Formula.gif)