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This allows an application to have depth in read-only feedback loop while stencil is being written to for example. Bug: angleproject:7899 Bug: b/192477489 Change-Id: Ic2e11d32da7c7e3a7f3cd86dbafc5c56a0dbbfd7 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4116730 Reviewed-by: Yuxin Hu <yuxinhu@google.com> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
98 lines
2.0 KiB
Plaintext
98 lines
2.0 KiB
Plaintext
Name
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ANGLE_read_only_depth_stencil_feedback_loops
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Name Strings
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GL_ANGLE_read_only_depth_stencil_feedback_loops
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Contributors
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Jamie Madill, Google Inc.
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Shahbaz Youssefi, Google Inc.
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Contact
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Jamie Madill, Google Inc. (jmadill 'at' google 'dot' com)
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Status
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WIP
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Version
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Last Modified Date: Dec 22, 2022
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Author Revision: 1
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Number
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OpenGL ES Extension ###
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Dependencies
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OpenGL ES 3.0 is required.
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The extension is written against the OpenGL ES 3.2 specification.
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Overview
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This extension allows defined results when reading from a depth or stencil
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texture that is bound as a read-only depth or stencil buffer.
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IP Status
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No known IP claims.
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New Procedures and Functions
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None
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New Tokens
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None
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Additions to Chapter 8 of the OpenGL ES 3.2 Specification (Textures and
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Samplers)
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Added to the list of conditions in 8.14.2.1 (Rendering Feedback Loops):
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"The texture is not a depth texture, or the value of
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DEPTH_WRITEMASK is not FALSE."
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"The texture is not a stencil texture, or stencil is not being modified."
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Additions to Chapter 9 of the OpenGL ES 3.1 Specification (Framebuffers and
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Framebuffer Objects)
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Removed from the end of section in 9.3.1 (Rendering Feedback Loops):
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"Also note that even if writing to a given texture is disabled (e.g. via the color,
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depth, or stencil writemasks) during rendering, a feedback loop will still occur."
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Added from the end of section in 9.3.1 (Rendering Feedback Loops):
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"Note that if writing to a given depth texture is disabled (via the depth
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writemask) during rendering, a feedback loop will not occur. Additionally,
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if writing to a given stencil texture is disabled (via the stencil mask and ops),
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a feedback loop will not occur."
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Errors
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None
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New State
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None
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Issues
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TBD
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Revision History
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Revision 2, 2022/12/22
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- Adjust language to exclude read-only stencil from feedback loop
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Revision 1, 2022/05/09
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- Initial revision.
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