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().
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)
drivers - Mesa drivers (not used with Gallium)
common - code which may be shared by all drivers
dri - Direct Rendering Infrastructure drivers
common - code shared by all DRI drivers
i915 - driver for Intel i915/i945
i965 - driver for Intel i965
radeon - driver for ATI R100
r200 - driver for ATI R200
x11 - Xlib-based software driver
osmesa - off-screen software driver
math - vertex array translation and transformation code (not used with Gallium)
program - Vertex/fragment shader and GLSL compiler code
sparc - Assembly code/optimizations for SPARC systems (not used with Gallium)
state_tracker - Translator from Mesa to Gallium. This is basically a Mesa device driver that speaks to Gallium. This directory may be moved to src/mesa/drivers/gallium at some point.
swrast - Software rasterization module. For drawing points, lines, triangles, bitmaps, images, etc. in software. (not used with Gallium)
swrast_setup - Software primitive setup. Does things like polygon culling, glPolygonMode, polygon offset, etc. (not used with Gallium)
tnl - Software vertex Transformation ‘n Lighting. (not used with Gallium)
tnl_dd - TNL code for device drivers. (not used with 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
i915 - Driver for Intel i915/i945.
llvmpipe - Software driver using LLVM for runtime code generation.
nouveau - Driver for NVIDIA GPUs.
radeon - Shared module for the r600 and radeonsi drivers.
radeonsi - Driver for AMD Southern Island.
r300 - Driver for ATI R300 - R500.
r600 - Driver for ATI/AMD R600 - Northern Island.
softpipe - Software reference driver.
svga - Driver for VMware’s SVGA virtual GPU.
trace - Driver for tracing Gallium calls.
auxiliary - Gallium support code
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.
cso_cache - Constant State Objects Cache. Used to filter out redundant state changes between frontends and drivers.
gallivm - LLVM module for Gallium. For LLVM-based compilation, optimization and code generation for TGSI shaders. Incomplete.
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.
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.
clover - OpenCL frontend
dri - Meta frontend for DRI drivers
glx - Meta frontend for GLX
wgl - Windows WGL frontend
xa - XA frontend
xvmc - XvMC frontend
vdpau - VDPAU frontend
va - VA-API frontend
omx_bellagio - OpenMAX Bellagio frontend
glx - The GLX library code for building libGL using DRI drivers.
lib - hardlinks to most binaries as produced by the build system. These (shortcuts) are used for development purposes in conjunction with LD_LIBRARY_PATH and/or LIBGL_DRIVERS_PATH.