This patch passes the offset and extent properties to the layer shader
by extending the uniform. The fragment shader stage now also receives
the transformation uniform, which contains a has_sub boolean to
distinguish if the properties are set, so between projection and quad layers.
To avoid color bleeding the subimage sampling happens on a global pixel
coordinates basis as ivec2 using the GLSL texelFetch function.
Projection layers will be sampled as before.
This fixes a regression introduced by the IPC and layer rendering
patchsets and passes the array_index to the correct places, so the
correct VkImageView is used instead of the one with index 0.
Make the renderer and IPC aware of multiple projection and quad layers
using the layer renderer.
Remove redundant code related to idle images and imported buffers and
command buffer rebuild, since we now always just display the layer
renderer's frame buffer.
Get view and projection properties from xrt_device.
Do wait on device idle when destroying the swap chain.
Don't wait on device idle multiple times in resize.
Validation on NVIDA and AMD is happy when only keeping
the two idles when resizing and destroying the swapchain.
Use the same counter for frame and command buffers, as their number is
equal, which is retrieved from swapchain.image_count.
Use the struct member num_buffers in favor of passing it as parameter.
Reuse some command buffer functions.
This patch has been spun of the rather massive amount of work for adding input
devices into Monado. The interfaces feels somewhat stable now so could do
with another pair of eyes on them, before too much work is done on st/oxr.
