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panfrost: Make comment less confusing

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Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10393>
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Alyssa Rosenzweig 2021-04-21 11:44:07 -04:00 • committed by Marge Bot
parent c6bb55ffcf
commit a368cc022d
1 changed files with 4 additions and 6 deletions
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10
src/gallium/drivers/panfrost/pan_blend_cso.c
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@ -49,12 +49,10 @@
* However, that same blend configuration will compile to many different blend
* shaders, depending on the framebuffer formats active. The rationale is that
* blend shaders override not just fixed-function blending but also
* fixed-function format conversion. As such, each blend shader must be
* hardcoded to a particular framebuffer format to correctly pack/unpack it. As
* a concrete example, to the hardware there is no difference (!) between RG16F
* and RG16UI -- both are simply 4-byte-per-pixel chunks. Thus both formats
* require a blend shader (even with blending is totally disabled!), required
* to do conversion as necessary (if necessary).
* fixed-function format conversion, so blend shaders are keyed to a particular
* framebuffer format. As an example, the tilebuffer format is identical for
* RG16F and RG16UI -- both are simply 32-bit raw pixels -- so both require
* blend shaders.
*
* All of this state is encapsulated in the panfrost_blend_state struct
* (our subclass of pipe_blend_state).