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'''OpenGL extension QCOM.shader_framebuffer_fetch_rate
This module customises the behaviour of the
OpenGL.raw.GLES2.QCOM.shader_framebuffer_fetch_rate to provide a more
Python-friendly API
Overview (from the spec)
When certain built-ins (e.g. gl_LastFragData, gl_LastFragStencilARM)
are referenced in the shader, the shader is required to execute at sample-rate
if the attachments are multisampled. In some use-cases executing such shaders
at fragment-rate is actually the preferred behavior. When this extension is
enabled, such GLSL shaders will execute at fragment-rate and the built-in
will return a per-fragment value. This avoids the significant performance
penalty that would otherwise be incurred with sample-rate shading.
The following built-ins are affected when the this extension is enabled:
gl_LastFragData (from EXT_shader_framebuffer_fetch)
gl_LastFragDepthARM (from ARM_shader_framebuffer_fetch_depth_stencil)
The following built-ins are disallowed when this extension is enabled:
gl_SampleID
gl_SamplePosition
interpolateAtSample()
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/QCOM/shader_framebuffer_fetch_rate.txt
'''
from OpenGL import platform, constant, arrays
from OpenGL import extensions, wrapper
import ctypes
from OpenGL.raw.GLES2 import _types, _glgets
from OpenGL.raw.GLES2.QCOM.shader_framebuffer_fetch_rate import *
from OpenGL.raw.GLES2.QCOM.shader_framebuffer_fetch_rate import _EXTENSION_NAME
def glInitShaderFramebufferFetchRateQCOM():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
### END AUTOGENERATED SECTION
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