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The point is to avoid having to re-validate all image units when
_NEW_TEXTURE is flagged, which can be expensive if the driver exposes
a large number of image units. This has been reported to fix a 36%
performance regression in the Synmark2 Multithread benchmark on the
i965 driver which exposes 192 image units.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91788
Reported-by: Wendy Wang <[email protected]>
Tested-by: Ye Tian <[email protected]>
CC: "11.0" <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>
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A future commit will remove all texture object-dependent derived state
from the image unit struct to make validation unnecessary on texture
state changes. Instead of checking gl_image_unit::_Valid drivers will
be required to call this function when needed to find out whether an
image unit is in a valid state and whether access from the shader is
allowed.
Tested-by: Ye Tian <[email protected]>
CC: "11.0" <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>
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deleted.
The ES31-CTS.shader_image_load_store.basic-api-bind conformance test
expects the whole image unit state to be reset when the bound texture
object is deleted. The ARB_shader_image_load_store extension is
rather vague regarding what should happen with image unit state other
than the texture object in that case, but the GL 4.2 and GLES 3.1
specifications (section "Automatic Unbinding of Deleted Objects")
explicitly require it to be reset to the default values.
Reviewed-by: Tapani Pälli <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>
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The function glMemoryBarrierByRegion is part of OpenGL ES 3.1
and OpenGL 4.5 core and compatibility profiles.
Signed-off-by: Marta Lofstedt <[email protected]>
Reviewed-by: Tapani Pälli <[email protected]>
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This is the required initial image unit state according to "Table 23.45. Image
State (state per image unit)" of the OpenGL 4.3 specification.
Reviewed-by: Matt Turner <[email protected]>
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Reviewed-by: Matt Turner <[email protected]>
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This function will be useful for back-ends to translate an image internal
format as specified in GLSL code into a mesa format.
Reviewed-by: Matt Turner <[email protected]>
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Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>
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Reviewed-by: Chris Forbes <[email protected]>
Reviewed-by: Paul Berry <[email protected]>
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v2: Name image format classes consistently, fix array and 3D teximage
selection with layered = GL_FALSE, make sure that the
user-specified layer is less than the number of texture layers,
add some asserts.
Reviewed-by: Chris Forbes <[email protected]>
Reviewed-by: Paul Berry <[email protected]>
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