egl: move alloc & init out of _eglBuiltInDriver{DRI2,Haiku}

Note: dropping the EGL_BAD_ALLOC in egl_haiku because it's
overwritten by the EGL_NOT_INITIALIZED in eglInitialize().

Signed-off-by: Eric Engestrom <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>

3 files changed, 12 insertions, 9 deletions

diff --git a/src/egl/main/README.txt b/src/egl/main/README.txt
index 1af99599729..9b5fd410618 100644
--- a/src/egl/main/README.txt
+++ b/src/egl/main/README.txt
@@ -19,13 +19,12 @@ 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).
+The built-in driver's entry point function is then called and given
+a freshly allocated and initialised _EGLDriver, with default fallback
+entrypoints set.
 
 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
+populated with all the EGL entrypoints. Some functions like
 driver->API.Initialize and driver->API.Terminate _must_ be implemented
 with driver-specific code (no default/fallback function is possible).
 
diff --git a/src/egl/main/egldriver.c b/src/egl/main/egldriver.c
index 5d5b7daa418..92ea6450944 100644
--- a/src/egl/main/egldriver.c
+++ b/src/egl/main/egldriver.c
@@ -52,8 +52,12 @@ _eglGetDriver(void)
 {
    mtx_lock(&_eglModuleMutex);
 
-   if (!_eglDriver)
-      _eglDriver = _eglBuiltInDriver();
+   if (!_eglDriver) {
+      _eglDriver = calloc(1, sizeof(*_eglDriver));
+      if (!_eglDriver)
+         return NULL;
+      _eglInitDriver(_eglDriver);
+   }
 
    mtx_unlock(&_eglModuleMutex);
 
diff --git a/src/egl/main/egldriver.h b/src/egl/main/egldriver.h
index d28ffe0214c..a3f9b991284 100644
--- a/src/egl/main/egldriver.h
+++ b/src/egl/main/egldriver.h
@@ -81,8 +81,8 @@ struct _egl_driver
 };
 
 
-extern _EGLDriver*
-_eglBuiltInDriver(void);
+extern void
+_eglInitDriver(_EGLDriver *driver);
 
 
 extern _EGLDriver *