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egl: use dlsym() to try to identify APIs

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This commit is contained in:
Brian Paul 2008-06-19 16:12:17 -06:00
parent a8533d5493
commit 064001dbe7
1 changed files with 45 additions and 2 deletions
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47
src/gallium/winsys/egl_xlib/egl_xlib.c
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@ -32,6 +32,7 @@
*/
#include <dlfcn.h>
#include <X11/Xutil.h>
#include "pipe/p_compiler.h"
@ -202,7 +203,6 @@ xlib_eglInitialize(_EGLDriver *drv, EGLDisplay dpy,
static EGLBoolean
xlib_eglTerminate(_EGLDriver *drv, EGLDisplay dpy)
{
return EGL_TRUE;
}
@ -342,6 +342,10 @@ xlib_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
/* API-dependent context creation */
switch (ctx->Base.ClientAPI) {
case EGL_OPENGL_ES_API:
_eglLog(_EGL_DEBUG, "Create Context for ES version %d\n",
ctx->Base.ClientVersion);
/* fall-through */
case EGL_OPENGL_API:
/* create a softpipe context */
ctx->pipe = softpipe_create(xdrv->screen, xdrv->winsys, NULL);
@ -372,6 +376,8 @@ xlib_eglDestroyContext(_EGLDriver *drv, EGLDisplay dpy, EGLContext ctx)
else {
/* API-dependent clean-up */
switch (context->Base.ClientAPI) {
case EGL_OPENGL_ES_API:
/* fall-through */
case EGL_OPENGL_API:
st_destroy_context(context->Context);
break;
@ -554,6 +560,36 @@ xlib_eglSwapBuffers(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw)
}
/**
* Determine which API(s) is(are) present by looking for some specific
* global symbols.
*/
static EGLint
find_supported_apis(void)
{
EGLint mask = 0;
void *handle;
handle = dlopen(NULL, 0);
if (dlsym(handle, "st_api_OpenGL_ES1"))
mask |= EGL_OPENGL_ES_BIT;
if (dlsym(handle, "st_api_OpenGL_ES2"))
mask |= EGL_OPENGL_ES2_BIT;
if (dlsym(handle, "st_api_OpenGL"))
mask |= EGL_OPENGL_BIT;
if (dlsym(handle, "st_api_OpenVG"))
mask |= EGL_OPENVG_BIT;
dlclose(handle);
return mask;
}
/**
* This is the main entrypoint into the driver.
* Called by libEGL to instantiate an _EGLDriver object.
@ -584,7 +620,14 @@ _eglMain(_EGLDisplay *dpy, const char *args)
xdrv->Base.API.MakeCurrent = xlib_eglMakeCurrent;
xdrv->Base.API.SwapBuffers = xlib_eglSwapBuffers;
xdrv->Base.ClientAPIsMask = EGL_OPENGL_BIT /*| EGL_OPENGL_ES_BIT*/;
xdrv->Base.ClientAPIsMask = find_supported_apis();
if (xdrv->Base.ClientAPIsMask == 0x0) {
/* the app isn't directly linked with any EGL-supprted APIs
* (such as libGLESv2.so) so use an EGL utility to see what
* APIs might be loaded dynamically on this system.
*/
xdrv->Base.ClientAPIsMask = _eglFindAPIs();
}
xdrv->Base.Name = "Xlib/softpipe";