SUN_slice_accum
GL_SUN_slice_accum
Jack Middleton, Sun (Jack.Middleton 'at' sun.com)
Shipping (version 1.3)
$Date: 02/03/13 15:15:35 $Revision: 1.3 $
258
The extension is written against the OpenGL 1.3 Specification.
This extension defines a new accumulation operation which enables the accumulation
buffer to be used for alpha compositing. This enables higher precision alpha
blending than what can be accomplished using the blend operation.
There are no known IP issues.
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   New Procedures and Functions |
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Accepted by the <op> parameter of Accum,
SLICE_ACCUM_SUN 0x85CC
| Additions to Chapter 2 of the 1.3 GL Specification (OpenGL Operation) |
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| Additions to Chapter 3 of the 1.3 GL Specification (Rasterization) |
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| Additions to Chapter 4 of the 1.3 GL Specification (Per-Fragment Operations and the Framebuffer) |
Section 4.2.4 The Accumulation Buffer:
The possible operations are ACCUM, LOAD, RETURN, MULT, ADD and SLICE_ACCUM_SUN.
The SLICE_ACCUM_SUN operation has the same effect as ACCUM except that the
accumulation buffer color value is computed:
AccumRGB = (FrameBuffAlpha * FrameBuffRGB) + ((1 - FrameBuffAlpha) * AccumRGB)
| Additions to Chapter 5 of the 1.3 GL Specification (Special Functions) |
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| Additions to Chapter 6 of the 1.3 GL Specification (State and State Requests) |
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| Additions to the GLX / WGL / AGL Specifications |
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 |  | Last update: November 14, 2006.
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