Mesa

Mesa is an open-source 3D graphics library that provides the commonly-used DRI and Gallium3D open-source Linux graphics drivers.

www.mesa3d.org

Today's Activity

st/glsl: support clamping color outputs in compat for gs/tes
Timothy Arceri: This support requires the driver to be a NIR driver as we use the NIR lowering pass to do the clamping.

Other Activity This Week

Docs add 19.0.7 release notes
Dylan Baker

panfrost/midgard: Implement UBO reads
Alyssa Rosenzweig: UBOs and uniforms now use a common code path with an explicit `index` argument passed, enabling UBO reads.

radv: add support for VK_AMD_buffer_marker
Samuel Pitoiset: This simple extension might be useful for debugging purposes.

include: update GL headers from the registry
Marek Olšák

panfrost: Implement rasterizer discard
Alyssa Rosenzweig: D'aww, look how cute that is now that scoreboarding is setup.

panfrost: Implement command stream scoreboarding
Alyssa Rosenzweig: This is a rather complex change, adding a lot of code but ideally cleaning up quite a bit as we go. Within a batch (single frame), there are multiple distinct Mali job types: SET_VALUE, VERTEX, TILER, FRAGMENT for the few that we emit right now (eventually more for compute and geometry shaders).

anv: Implement "pop-free" clipping
Jason Ekstrand: This is the preferred clipping mode since it doesn't mean your points disappear the moment part of the point crosses over the edge of the viewport and that lines have weird endpoints at viewport edges.

radv: implement all depth/stencil resolve modes using compute
Samuel Pitoiset: This path supports layers but it requires to decompress HTILE before resolving.

radv: implement all depth/stencil resolve modes using graphics
Samuel Pitoiset: When using graphics, the driver doesn't need to decompress HTILE before resolving.

llvmpipe: make remove_shader_variant static
Dave Airlie: this isn't used outside this file.

iris: Implement INTEL_DEBUG=pc for pipe control logging
Kenneth Graunke: This prints a log of every PIPE_CONTROL flush we emit, noting which bits were set, and also the reason for the flush.

panfrost: Switch to lima tiling
Alyssa Rosenzweig: Lima and Panfrost both have implementations of software tiling (the Lima one was forked off the Panfrost one which was forked off the original Lima one...).

lima,panfrost: Move lima_tiling.c/h to /src/panfrost
Alyssa Rosenzweig: This will allow both drivers to share this code.

anv: only resort to sync fds internally with no syncobj support
Lionel Landwerlin: We can rely on only one kind of synchronization object (drm-syncobj) when it is available.

isl: tag unreachable path as such
Eric Engestrom: GCC should be able to figure out that all the possible enum values are exhausted in the switch() and all the branches return from the function, but apparently it doesn't, so let's tell the compiler explicitly. This gets rid of the following warnings in GCC 9: [1/24] Compiling C object 'src/intel/isl/60d23f8@@isl@sta/isl.c.o'.

radv: enable DCC for mipmapped color textures on GFX8
Samuel Pitoiset: It's tricky on GFX9, so only GFX8 for now.

radv: add fast clears support for mipmapped color images with DCC
Samuel Pitoiset

gallium/util: Make it possible to disable persistent maps in the upload manager
Thomas Hellstrom: For svga, the use of persistent / coherent maps is typically slightly slower than without them.

svga: Map vertex- index- and constant buffers ansynchronously when reading
Thomas Hellstrom: With SWTNL and index translation we're mapping buffers for reading.

winsys/svga: Make it possible to specify coherent resources
Thomas Hellstrom: Add a flag in the surface cache key and a winsys usage flag to specify coherent memory.

gallium/util: Make u_debug_flush support persistent maps
Thomas Hellstrom: Previously unsynchronized maps have been assumed to also be persistent, Now destinguish between persistent and unsynchronized map and also support PIPE_TRANSFER_PERSISTENT from ARB_buffer_storage.

virgl: Add a tweak to set the value for emulated queries of GL_SAMPLES_PASSED
Gert Wollny: On GLES hosts GL_SAMPLES_PASSED is emulated by GL_ANY_SAMPLES_PASSED which returns a boolen.

virgl: Add tweak to apply a swizzle when drawing/blitting to a emulated BGRA texture
Gert Wollny: With Qemu this final swizzle is not needed, but with vtest it is, i.e.

virgl: Add driconf tweak for emulating BGRA surfaces on GLES
Gert Wollny: These tweaks are used to fix rendering issues with Valve games and at least also "The Raven Remastered" when run on a GLES host.

virgl: Add override for BGRA format to use swizzled SRGB format
Gert Wollny: Tie in the check whether the host supports tweaks and whether this tweak is enabled.

gallium/virgl: Add code path for virgl to read driconf
Gert Wollny: This works only for the drm variant of virgl and not for the vtest

virgl: Add driinfo file and tie it into the build
Gert Wollny

Mesa Release Tags

radv: consider MESA_VK_VERSION_OVERRIDE when setting the api version
Eleni Maria Stea: Before setting the physical device API version, we should check if the MESA_VK_VERSION_OVERRIDE environment variable is set and take it into account.

simplify LLVM version string printing
Eric Engestrom: Figure it out once in the build system, then just use that all over the place.

freedreno: fix release tarball
Rob Clark: Fixes: b4476138d5a freedreno: move drm to common location

freedreno: more fixing release tarball
Rob Clark: Fixes: aa0fed10d35 freedreno: move ir3 to common location

vulkan/utils: s/VERSION/PACKAGE_VERSION/
Eric Engestrom: Everything else uses PACKAGE_VERSION, so let's be consistent, and

build: stop defining unused VERSION
Eric Engestrom: Scons and autotools don't define it, and as of last commit nothing uses it.

autotools, meson: bump up required VA version
Juan A. Suarez Romero: Due using a new VP9 config we use, required VA API 0.39

mesa: simplify MESA_GL_VERSION_OVERRIDE behavior of API override
Marek Olšák: v2: - Provide a correct explanation on the envvars documentation (Ian). - Provide a more correct explanation on the function comments (Andres). v3: - Homogenize documentation and inline comments (Emil). - Correct a typo (Emil). Fixes: 2599b92eb97 ("mesa: allow forcing >=3.1 compatibility contexts with MESA_GL_VERSION_OVERRIDE") Cc: Jordan Justen Cc: Ian Romanick Cc: Eric Engestrom Cc: Emil Velikov

mesa: adds some comments regarding MESA_GLES_VERSION_OVERRIDE usage
Andres Gomez: Fixes: 03fd6704db9 ("mesa: Add support for a new override string MESA_GLES_VERSION_OVERRIDE")

dri3: Fix typo in version check
Daniel Stone: The have-new-DRI3 codepaths would never actually properly trigger, since there was a typo in configure.ac which broke the version check.

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egl: add EGL_platform_device support
Emil Velikov: This new 'platform' is added by default with no guards. It is effectively a copy of the surfaceless one, with updated function names and brand new probe function. Due to the reuse, some of the ifdef HAVE_SURFACELESS_PLATFORM guards have been dropped. A worthy mention are the changes in _egFindDisplay, since the original and dup'd fd are required, we make use of the plat_opt argument. Note that no hacks for eglGetDisplay are added - the API works only with the eglGetPlatformDisplay* API. v2:- s/_eglCompareDeviceDisplay/_eglSameDeviceDisplay/ (Eric)- let ^^ return bool (Eric)- fixup meson build, move files() further up (Eric)- copy from plat.

nir: Rematerialize compare instructions
Ian Romanick: On some architectures, Boolean values used to control conditional branches or condtional selection must be propagated into a flag.

vl: Enable DRM by default
Bas Nieuwenhuizen: If libdrm is found the pipe loader enables drm anyway, and that is pretty much the only extra dependency this code has.

panfrost: Add support for TXS instructions
Boris Brezillon: This patch adds support for nir_texop_txs instructions which are needed to support the OpenGL textureSize() function.

anv: Add stencil texturing support for gen7
Jason Ekstrand: Intel hardware didn't get support for sampling from W-tiled (required for stencil) images until Broadwell so we can't directly sample from stencil.

radeonsi: clean up winsys creation
Marek Olšák

nir: add a vectorization pass
Connor Abbott: This effectively does the opposite of nir_lower_alus_to_scalar, trying to combine per-component ALU operations with the same sources but different swizzles into one larger ALU operation.

egl: keep the software device at the end of the list
Emil Velikov: By default, the user is likely to pick the first device so it should not be the least performant (aka software) one.

radv: handle sample locations during automatic layout transitions
Samuel Pitoiset: From the Vulkan spec 1.1.109: "Some implementations may need to evaluate depth image values while performing image layout transitions.

iris: Ask st to vectorize our IO.
Kenneth Graunke: (Technically this is common code, but it doesn't affect i965 or anv.)

Mesa

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