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Hash : 519d330c
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Date : 2023-08-28T15:41:18

Add GL_RGBX8_SRGB_ANGLEX and GL_BGRX8_SRGB_ANGLEX formats

If app creates AHB with sRGBX format, and then create a EGLImage,
Image::initialize() will retrieve the sized format from AHB, which is
GL_RGBX_ANGLE, and then try to convert to sRGB color space. The bug here
is that GetNonLinearFormat will pick GL_SRGB8 for all these formats
:GL_RGB8, GL_BGRX8_ANGLEX, GL_RGBX8_ANGLE. This means that different
AHBS with these three different format will end up createing a tetxure
with same format which sRGB. I think the reason somone did it this way
initially simply because there is no sRGB corresponding format available
for BGRX8 and RGBX8. This CL adds sRGB internal version of these two
formats, thus make it straight forward to pick the correct sRGB format.

The other change here is for AHBs, right now we are always force
mRequiredImageAccess to be Renderable. This actually workedaround the
bug that mentioned earlier that we are picking the wrong format. Because
of forced renderable, we end up with SRGB fallback to SRGBA. But
external images should not fallback, we should use its existing format
as is since it can be accessed via AHB interface directly.

Bug: b/298037344
Change-Id: I6119c4015cc5bf0effdf0530cb756b6c4656c38f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4819053
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Charlie Lao <cclao@google.com>

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