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ANGLE_read_only_depth_stencil_feedback_loops.txt
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ANGLE_read_only_depth_stencil_feedback_loops.txt
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Name
ANGLE_read_only_depth_stencil_feedback_loops
Name Strings
GL_ANGLE_read_only_depth_stencil_feedback_loops
Contributors
Jamie Madill, Google Inc.
Shahbaz Youssefi, Google Inc.
Contact
Jamie Madill, Google Inc. (jmadill 'at' google 'dot' com)
Status
WIP
Version
Last Modified Date: Dec 22, 2022
Author Revision: 1
Number
OpenGL ES Extension ###
Dependencies
OpenGL ES 3.0 is required.
The extension is written against the OpenGL ES 3.2 specification.
Overview
This extension allows defined results when reading from a depth or stencil
texture that is bound as a read-only depth or stencil buffer.
IP Status
No known IP claims.
New Procedures and Functions
None
New Tokens
None
Additions to Chapter 8 of the OpenGL ES 3.2 Specification (Textures and
Samplers)
Added to the list of conditions in 8.14.2.1 (Rendering Feedback Loops):
"The texture is not a depth texture, or the value of
DEPTH_WRITEMASK is not FALSE."
"The texture is not a stencil texture, or stencil is not being modified."
Additions to Chapter 9 of the OpenGL ES 3.1 Specification (Framebuffers and
Framebuffer Objects)
Removed from the end of section in 9.3.1 (Rendering Feedback Loops):
"Also note that even if writing to a given texture is disabled (e.g. via the color,
depth, or stencil writemasks) during rendering, a feedback loop will still occur."
Added from the end of section in 9.3.1 (Rendering Feedback Loops):
"Note that if writing to a given depth texture is disabled (via the depth
writemask) during rendering, a feedback loop will not occur. Additionally,
if writing to a given stencil texture is disabled (via the stencil mask and ops),
a feedback loop will not occur."
Errors
None
New State
None
Issues
TBD
Revision History
Revision 2, 2022/12/22
- Adjust language to exclude read-only stencil from feedback loop
Revision 1, 2022/05/09
- Initial revision.