Source Code Tree¶
This is a brief summary of Mesa’s directory tree and what’s contained in each directory.
docs - Documentation
include - Public OpenGL header files
amd - AMD-specific sources
addrlib - common sources for creating images
common - common code between RADV, radeonsi and ACO
compiler - ACO shader compiler
llvm - common code between RADV and radeonsi for compiling shaders using LLVM
registers - register definitions
vulkan - RADV Vulkan implementation for AMD Southern Island and newer
compiler - Common utility sources for different compilers.
glsl - the GLSL IR and compiler
nir - the NIR IR and compiler
spirv - the SPIR-V compiler
egl - EGL library sources
drivers - EGL drivers
main - main EGL library implementation. This is where all the EGL API functions are implemented, like eglCreateContext().
freedreno - Adreno-specific sources
fdl - mipmap layout manager
vulkan - Turnip is a Vulkan implementation for Qualcomm Adreno
gbm - Generic Buffer Manager is a memory allocator for device buffers
intel - Intel-specific sources
blorp - BLit Or Resolve Pass is a blit and HiZ resolve framework
vulkan - Anvil is a Vulkan implementation for Intel gen 7 (Ivy Bridge) and newer
mapi - Mesa APIs
glapi - OpenGL API dispatch layer. This is where all the GL entrypoints like glClear, glBegin, etc. are generated, as well as the GL dispatch table. All GL function calls jump through the dispatch table to functions found in main/.
mesa - Main Mesa sources
main - The core Mesa code (mainly state management)
math - vertex array translation and transformation code (not used with Gallium)
program - Vertex/fragment shader and GLSL compiler code
state_tracker - Translator from Mesa to Gallium. This is basically a Mesa device driver that speaks to Gallium.
vbo - Vertex Buffer Object code. All drawing with glBegin/glEnd, glDrawArrays, display lists, etc. goes through this module. The results is a well-defined set of vertex arrays which are passed to the device driver (or tnl module) for rendering.
x86 - Assembly code/optimizations for 32-bit x86 systems (not used with Gallium)
x86-64 - Assembly code/optimizations for 64-bit x86 systems (not used with Gallium)
gallium - Gallium3D source code
include - Gallium3D header files which define the Gallium3D interfaces
drivers - Gallium3D device drivers
etnaviv - Driver for Vivante.
freedreno - Driver for Qualcomm Adreno.
i915 - Driver for Intel i915/i945.
iris - Driver for Intel gen 8 (Broadwell) and newer.
lima - Driver for ARM Mali-400 (Utgard) series.
llvmpipe - Software driver using LLVM for runtime code generation.
nouveau - Driver for NVIDIA GPUs.
panfrost - Driver for ARM Mali Txxx (Midgard) and Gxx (Bifrost) GPUs.
radeon - Shared module for the r600 and radeonsi drivers.
r300 - Driver for ATI R300 - R500.
r600 - Driver for ATI/AMD R600 - Northern Island (Terascale).
radeonsi - Driver for AMD Southern Island and newer (GCN, RDNA).
softpipe - Software reference driver.
svga - Driver for VMware’s SVGA virtual GPU.
tegra - Driver for NVIDIA Tegra GPUs.
v3d - Driver for Broadcom VideoCore 5 and newer.
vc4 - Driver for Broadcom VideoCore 4.
virgl - Driver for Virtio virtual GPU of QEMU.
zink - Driver that uses Vulkan for rendering.
auxiliary - Gallium support code
cso_cache - Constant State Objects Cache. Used to filter out redundant state changes between frontends and drivers.
draw - Software vertex processing and primitive assembly module. This includes vertex program execution, clipping, culling and optional stages for drawing wide lines, stippled lines, polygon stippling, two-sided lighting, etc. Intended for use by drivers for hardware that does not have vertex shaders. Geometry shaders will also be implemented in this module.
gallivm - LLVM module for Gallium. For LLVM-based compilation, optimization and code generation for TGSI shaders. Incomplete.
hud - Heads-Up Display, an overlay showing GPU statistics
pipebuffer - utility module for managing buffers
rbug - Gallium remote debug utility
rtasm - run-time assembly/machine code generation. Currently there’s run-time code generation for x86/SSE, PowerPC and Cell SPU.
tessellator- used by software drivers to implement tessellation shaders
tgsi - TG Shader Infrastructure. Code for encoding, manipulating and interpreting GPU programs.
translate - module for translating vertex data from one format to another.
util - assorted utilities for arithmetic, hashing, surface creation, memory management, 2D blitting, simple rendering, etc.
vl - utility code for video decode/encode
frontends - These implement various libraries using the device drivers
clover - OpenCL frontend
d3d10umd - D3D10 frontend for Windows only. It’s similar to Microsoft WARP, but using llvmpipe/softpipe.
dri - Meta frontend for DRI drivers, see mesa/state_tracker
glx - Meta frontend for GLX
hgl - Haiku OpenGL
lavapipe - Vulkan frontend, software Vulkan rasterizer using llvmpipe.
nine - D3D9 frontend, see targets/d3dadapter9
omx - OpenMAX Bellagio frontend
osmesa - Off-screen OpenGL rendering library
va - VA-API frontend
vdpau - VDPAU frontend
wgl - Windows WGL frontend
xa - XA frontend
xvmc - XvMC frontend
winsys - The device drivers are platform-independent, the winsys connects them to various platforms. There is usually one winsys per device family, and within the winsys directory there can be multiple flavors connecting to different platforms.
drm - Direct Rendering Manager on Linux
gdi - Windows
xlib - indirect rendering on X Window System
targets - These control how the Gallium code is compiled into different libraries. Each of these roughly corresponds to one frontend.
d3dadapter9 - d3dadapter9.so for Wine
dri - libgallium_dri.so loaded by libGL.so
graw - raw Gallium interface without a frontend
glx - The GLX library code for building libGL.so using DRI drivers.
loader - Used by libGL.so to find and load the appropriate DRI driver.
panfrost - Panfrost-specific sources
bifrost - shader compiler for the Bifrost generation GPUs
lib - GPU data structures (command stream) support code`
midgard - shader compiler for the Midgard generation GPUs
shared - shared Mali code between Lima and Panfrost
util - shared code between Midgard and Bifrost shader compilers
util - Various utility codes
vulkan - Common code for Vulkan drivers