Starting in iOS/tvOS 13, Apple family 4 and up support 124 fragment
input components, matching macOS. Reduce Mac max to 124 to prevent Metal
from complaining when using more than 124 components.
Tessellation control shaders must support at least 120 per-patch output
components, so make sure the limit is that value.
The `MTLCaptureManager`--at least, the one in the capture layer--uniques
capture scopes created for queues. The two scopes we created--for
command buffer submission and surface presentation, respectively--wound
up referring to the same scope. So don't even bother creating a second
one. Use one scope for everything on the queue.
Since there's no need for the 'purpose' parameter anymore, remove it.
Honestly, I think this is a shame. It's useful to be able to create
distinct scopes for command buffer submission and swapchain
presentation. I've filed FB8791712 to get Apple to let us create
multiple scopes for a single queue. Unfortunately, until that's
resolved, because the objects are uniqued, this will interfere with a
forthcoming workaround for a retain bug in Metal relating to capture
scopes.
In #1093 it was reported that `MTLStorageModeShared` textures don't
actually work on 10.15.5, but do work on 10.15.7. I've increased the
minimum to 10.15.6 for now. If someone else reports that it doesn't work
on 10.15.6 either, I'll bump it to 10.15.7.
Moved to a new model for creation: create and potentially destroy the object
within MVKDevice::create..., to hide it from vulkan.mm where all other object
creation errors are handled. We could move to this slowly over time.
Passes all 49 private data CTS tests.
Prior to this, we weren't even setting the `BLIT_DST` bit for
depth/stencil formats. Conforming apps would thus never pass DS images
at all to `vkCmdBlitImage()`. It is now possible to do that, and even
get scaling and inversion to boot.
Stencil blits require the use of stencil feedback. If this feature isn't
available, both stencil and packed depth/stencil formats have their
`BLIT_SRC` and `BLIT_DST` features turned off, to prevent apps from
attempting to blit the stencil aspect.
There's only a couple of failing tests, involving a 1D stencil blit
(really a 2D stencil with height 1). For some reason, the fragments
produced during a scaled blit get spread out over the rendering surface.
I think this is a bug in Metal; we can't do anything about it.
I've noticed that in some tests, the clear values seem to be off by
about one ULP, and the tests subsequently fail. This should cause Metal
to round up instead of down and fix those tests.
Move setting of limits from MVKPhysicalDevice::initProperties() into separate
initLimits() function. Call initProperties() before initMetalFeatures() and
initLimits() after initMetalFeatures().
Retrieve MTLDrawable when requested, not in MTLCommandBuffer scheduled
handler, in case a different drawable is established by then.
Call timed present after adding presented handler, to avoid race
condition if presentation happens before handler is added.
Update MVKPresentableSwapchainImage::presentCAMetalDrawable() to create a
MTLCommandBuffer scheduled-handler and present the MTLDrawable from there.
According to Apple, it is more performant to call MTLDrawable present from within a
MTLCommandBuffer scheduled-handler than it is to call MTLCommandBuffer presentDrawable:.
Pass presentation timing info as a struct to simplify calls.
useIOSurface() sets the plane information in IOSurface only if
the image format has chroma subsampling. And when we import an
IOSurface, we should only check count of planes when the format
has chroma subsampling.
This resolves a crash in the following case to let two VkImages
share the same IOSurface:
```
VkImage image1, image2;
// the format in |info| is a non-chroma-subsampling format,
// e.g. R8G8B8A8_UNORM.
vkCreateImage(info, &image1);
vkCreateImage(info, &image2);
IOSurfaceRef ioSurface;
vkUseIOSurfaceMVK(image1, nil);
vkGetIOSurfaceMVK(image1, &ioSurface);
vkUseIOSurfaceMVK(image2, ioSurface);
```
For an MVKImage, when we call vkUseIOSurfaceMVK(),
the MTLTexture of each plane will be released but not
reset. And later when we destroy the MVKImage, the
destructor of MVKImagePlane calls releaseMTLTexture()
again, which will cause a crash because of double releasing
of an object.
To solve this we need to reset _mtlTexture to nil after
it is successfully released.
MVKImage track VkImageFormatListCreateInfo::pViewFormats
and validate MVKImageView format against them.
Add MVKImage::getMTLTextureUsage() and move tests for dedicated aliasables,
compressed formats, and minimum image usage into it.
Add MVKMTLFormatDesc::mtlPixelFormatLinear and
MVKPixelFormats::compatibleAsLinearOrSRGB()
to track linear counterparts to each Metal sRGB format.
Don't use MTLTextureUsagePixelFormatView if image will only
allow views that use same format or its sRGB/linear variation.
I know I said I wouldn't have any more, but this fixes a problem with
my change #1064 that could trip Metal's validation layer and/or result in
no data being copied.
