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The new interface mostly just sits on top of the existing library. The only change to the existing EGL code is to split the client extension string into platform extensions and everything else. On non-glvnd builds, eglQueryString will just concatenate the two strings. The EGL dispatch stubs are all generated. The script is based on the one used to generate entrypoints in libglvnd itself. v2: [Kyle] - Rebased against master. - Reworked the EGL makefile to use separate libraries - Made the EGL code generation scripts work with Python 2 and 3. - Change gen_egl_dispatch.py to use argparse for the command line arguments. - Assorted formatting and style cleanup in the Python scripts. v3: [Emil Velikov] - Rebase - Remove separate glvnd glx/egl configure toggles Signed-off-by: Emil Velikov <emil.velikov@collabora.com> |
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| .. | ||
| 50_mesa.json | ||
| egl.def | ||
| egl.pc.in | ||
| eglapi.c | ||
| eglapi.h | ||
| eglarray.c | ||
| eglarray.h | ||
| eglcompiler.h | ||
| eglconfig.c | ||
| eglconfig.h | ||
| eglcontext.c | ||
| eglcontext.h | ||
| eglcurrent.c | ||
| eglcurrent.h | ||
| egldefines.h | ||
| egldispatchstubs.c | ||
| egldispatchstubs.h | ||
| egldisplay.c | ||
| egldisplay.h | ||
| egldriver.c | ||
| egldriver.h | ||
| eglentrypoint.h | ||
| eglfallbacks.c | ||
| eglglobals.c | ||
| eglglobals.h | ||
| eglglvnd.c | ||
| eglimage.c | ||
| eglimage.h | ||
| egllog.c | ||
| egllog.h | ||
| eglsurface.c | ||
| eglsurface.h | ||
| eglsync.c | ||
| eglsync.h | ||
| egltypedefs.h | ||
| README.txt | ||
Notes about the EGL library: The EGL code here basically consists of two things: 1. An EGL API dispatcher. This directly routes all the eglFooBar() API calls into driver-specific functions. 2. Fallbacks for EGL API functions. A driver _could_ implement all the EGL API calls from scratch. But in many cases, the fallbacks provided in libEGL (such as eglChooseConfig()) will do the job. Bootstrapping: When the apps calls eglInitialize() a device driver is selected and loaded (look for _eglAddDrivers() and _eglLoadModule() in egldriver.c). The built-in driver's entry point function is then called. This driver function allocates, initializes and returns a new _EGLDriver object (usually a subclass of that type). As part of initialization, the dispatch table in _EGLDriver->API must be populated with all the EGL entrypoints. Typically, _eglInitDriverFallbacks() can be used to plug in default/fallback functions. Some functions like driver->API.Initialize and driver->API.Terminate _must_ be implemented with driver-specific code (no default/fallback function is possible). Shortly after, the driver->API.Initialize() function is executed. Any additional driver initialization that wasn't done in the driver entry point should be done at this point. Typically, this will involve setting up visual configs, etc. Special Functions: Certain EGL functions _must_ be implemented by the driver. This includes: eglCreateContext eglCreateWindowSurface eglCreatePixmapSurface eglCreatePBufferSurface eglMakeCurrent eglSwapBuffers Most of the EGLConfig-related functions can be implemented with the defaults/fallbacks. Same thing for the eglGet/Query functions. Teardown: When eglTerminate() is called, the driver->API.Terminate() function is called. The driver should clean up after itself. eglTerminate() will then close/unload the driver (shared library). Subclassing: The internal libEGL data structures such as _EGLDisplay, _EGLContext, _EGLSurface, etc should be considered base classes from which drivers will derive subclasses.