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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
- **src**
- **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
- XXX more
- **x11** - Xlib-based software driver
- **osmesa** - off-screen software driver
- XXX more
- **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.
- XXX more
- **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.
- XXX more
- **frontends** -
- **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
- **winsys** -
- **drm** -
- **gdi** -
- **xlib** -
- **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.
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