NAME¶
glMinSampleShading - specifies minimum rate at which sample shaing takes place
C SPECIFICATION¶
void
glMinSampleShading(GLfloat value);
PARAMETERS¶
value
Specifies the rate at which samples are shaded
within each covered pixel.
DESCRIPTION¶
glMinSampleShading specifies the rate at which samples are shaded within
a covered pixel. Sample-rate shading is enabled by calling
glEnable()
with the parameter
GL_SAMPLE_SHADING. If
GL_MULTISAMPLE or
GL_SAMPLE_SHADING is disabled, sample shading has no effect. Otherwise,
an implementation must provide at least as many unique color values for each
covered fragment as specified by
value times
samples where
samples is the value of
GL_SAMPLES for the current framebuffer.
At least 1 sample for each covered fragment is generated.
A
value of 1.0 indicates that each sample in the framebuffer should be
indpendently shaded. A
value of 0.0 effectively allows the GL to ignore
sample rate shading. Any value between 0.0 and 1.0 allows the GL to shade only
a subset of the total samples within each covered fragment. Which samples are
shaded and the algorithm used to select that subset of the fragment's samples
is implementation dependent.
NOTES¶
The type of the
value parameter was changed from GLclampf to GLfloat.
This change is transparent to user code and is described in detail on the
removedTypes() page.
ERRORS¶
None.
ASSOCIATED GETS¶
glGet() with argument
GL_MIN_SAMPLE_SHADING.
glGet() with argument
GL_SAMPLES.
SEE ALSO¶
removedTypes()
COPYRIGHT¶
Copyright © 2011 Khronos Group. This material may be distributed subject to
the terms and conditions set forth in the Open Publication License, v 1.0, 8
June 1999.
http://opencontent.org/openpub/.
