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Graphics

The Graphics channel is devoted to topics concerning Linux/BSD open-source graphics (GPU) hardware drivers, graphics rendering APIs, display servers, and related graphics/display projects.

Beignet

Beignet is an open-source OpenCL implementation for Intel graphics cores on Linux.

Cairo

Cairo is a vector graphics drawing API that offers multiple hardware and software-accelerated back-ends. Cairo is used by a variety of projects from X.Org to Mozilla and WebKit.

GLVND

The libglvnd project by NVIDIA is an attempt to create an OpenGL venture-neutral dispatch library for Linux systems. Advertised as the new Linux OpenGL ABI, GLVND is designed to make it easier for multiple GPU drivers to co-exist on the same system.

Mesa 3D Graphics Library

This sub-channel is devoted to everything Mesa, including Gallium3D drivers.

Pixman

Pixman is a pixel manipulation and rendering library.

POCL

POCL is the Portable Computing Language and most notably provides an open-source OpenCL library implementation.

Video Acceleration

Projects concerning video acceleration and video playback on graphics adapters are found within this sub-channel.

Wayland

Wayland and its related components are tracked here.

X.Org

The X.Org Server projects and other X.Org projects are tracked via this sub-channel.

Today's Activity

cursor: Use memfd_create() when available
Wayland - Emmanuel Gil Peyrot: This (so-far) Linux-only API lets users create file descriptors purely in memory, without any backing file on the filesystem and the race condition which could ensue when unlink()ing it.

Yesterday's Activity

mesa: add EXT_dsa glEnabledIndexedEXT
Mesa - Pierre-Eric Pelloux-Prayer: The implementation uses _mesa_ActiveTexture to change the active texture unit and then reset it.

ac/rtld: add support for Wave32
Mesa - Marek Olšák

radeonsi: add si_shader_selector into si_compute
Mesa - Marek Olšák: Now we can assume that shader->selector is always set.

radeonsi/gfx10: add as_ngg variant for TES as ES to select Wave32/64
Mesa - Marek Olšák: Legacy GS has to use Wave64, so TES before GS has to use Wave64 too.

ac: add Wave32 LLVM target machine
Mesa - Marek Olšák

This Week's Activity

build: bump to version 6.0.91 for the alpha release
Weston - Simon Ser

Add pipewire plugin
Weston - Michael Olbrich: It is quite similar to the remoting plugin.

image compositor: Support subpixel positioning
Cairo - Matthias Clasen: Support subpixel positioning with a 4x4 subpixel grid. When compositing glyphs in the image compositor, we store the subpixel phases in the high bits of the glyph index.

xlib compositor: Support subpixel positioning
Cairo - Matthias Clasen: As for the image compository, support a 4x4 subpixel grid.

panfrost: Implement Z32F(_S8) support
Mesa - Alyssa Rosenzweig: Z32F uses a dediacted float path.

radv/gfx10: do not always execute a barrier before the second shader
Mesa - Samuel Pitoiset: With NGG, empty waves may still be required to export data.

v3d: implement per-sample tlb color reads
Mesa - Iago Toral Quiroga

v3d: implement per-sample tlb color writes
Mesa - Iago Toral Quiroga

nir: add a V3D-specific intrinsic for per-sample color writes
Mesa - Iago Toral Quiroga: For per-sample color writes we need the output intrinsic to pack the sample index, which is not provided with regular store_output intrinsics unless we figured out a way to encode it into the base or the offset.

libweston: make session_active a bool
Weston - Robert Beckett: compositor->session_active should be a bool as it tracks a boolean condition.

This Month's Activity

panfrost/midgard: Use generic outmod type
Mesa - Alyssa Rosenzweig: It could be midgard_outmod_float or midgard_outmod_int; don't assume it's one or the other.

panfrost/decode: Add MEMORY_PROP_DIR variant
Mesa - Alyssa Rosenzweig: This allows dumping memory properties directly without dereferencing an address, allowing us to fix more -Waddress-of-packed-member warnings.

panfrost: Precompute scoreboard dependents
Mesa - Alyssa Rosenzweig: Mali job dependency graphs, at least for GLES3.0, have the special property that a given node will only have at most a single dependent.

panfrost: Remove transient pool abstraction
Mesa - Alyssa Rosenzweig: Now that it has been totally replaced by the borrow mechanism, it is now unused code.

panfrost: Add panfrost_transient_bo array
Mesa - Alyssa Rosenzweig: We would like transient allocations to occur on the screen (borrowed by the batch) rather than on the context.

nir/linker: Add inputs/outputs to the program resource list
Mesa - Antia Puentes: v2: added TODO comment hinting possible future refactoring of nir_build_program_resource_list and build_program_resource_list, to avoid code duplication (Alejandro, to explicitly reflect a

mesa/main: Fix UBO/SSBO ACTIVE_VARIABLES query (ARB_gl_spirv)
Mesa - Antia Puentes: When querying MAX_NUM_ACTIVE_VARIABLES, NUM_ACTIVE_VARIABLES and ACTIVE_VARIABLES over SSBO and UBO interfaces, we filter the variables which are active using the variable's name and looking for it in the program resource list.

radv/gfx10: enable 1D textures
Mesa - Samuel Pitoiset: Mirror RadeonSI.

radv/gfx10: enable vertex shaders without export parameters
Mesa - Samuel Pitoiset: GFX10 allows this.

v3d: use inc/dec tmu operation with image atomic sub/add of 1
Mesa - Alejandro Piñeiro: This allows to remove a mov of 1/-1, as it is implicit with the operation. As with atomic inc/dec/add, usual shader-db set doesn't include any GLES shader using it.

Recent Releases

build: bump to version 6.0.91 for the alpha release
Weston - Simon Ser

Bump version to 2.4.99
libdrm - Marek Olšák

radv: consider MESA_VK_VERSION_OVERRIDE when setting the api version
Mesa - 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.

Pre-release version bump to 0.38.4
Pixman - Matt Turner

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

configure.ac/meson.build: bump version to 6.0.0 for the official release
Weston - Derek Foreman

configure.ac: bump to version 1.17.0 for the official release
Wayland - Derek Foreman

configure.ac/meson.build: bump to version 5.0.94 for the RC2 release
Weston - Derek Foreman

configure.ac: bump version to 1.16.93 for the RC1 release
Wayland - Derek Foreman

configure.ac: bump version to 5.0.93 for the RC1 release
Weston - Derek Foreman

Popular Activity In The Past Month

Docs add 19.0.7 release notes
Mesa - Dylan Baker

util: add gradient pattern
libdrm - Ilia Mirkin

util: add fp16 format support
libdrm - Ilia Mirkin

radv: add support for VK_AMD_buffer_marker
Mesa - Samuel Pitoiset

util: add C8 format, support it with SMPTE pattern
libdrm - Ilia Mirkin

mesa: add support for glMapNamedBufferEXT()
Mesa - Timothy Arceri

meson: bump required libdrm version to 2.4.81
Mesa - Eric Engestrom

gitlab-ci: Enable gitlab page for publishing documentation
Weston - Marius Vlad

nir: add pass to lower load_interpolated_input
Mesa - Rob Clark

libweston: Add ingroup tag for weston_compositor
Weston - Marius Vlad

mesa: add display list support for gl(Compressed)TextureSubImage2DEXT
Mesa - Pierre-Eric Pelloux-Prayer

iris: Disable loop unrolling in GLSL IR.
Mesa - Kenneth Graunke

libweston: Add ingroup tag for weston_output
Weston - Marius Vlad

gallium: Add CAP for opcode DIV
Mesa - Gert Wollny

panfrost: Implement primitive restart
Mesa - Alyssa Rosenzweig

vl: replace DIV-ADD with MAD using inverse size
Mesa - Gert Wollny

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