egl: Overhaul driver API.

The motivation is so that drivers do not need to look up and check for
bad display, context, and etc.  It also becomes unnecessary for drivers
to call the link functions.

This commit makes eglapi.[ch] do the lookup and check.  As a result, the
driver API is overhauled, and almost all sources and drivers need
update.  The updates are mainly find and replace with human brains.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>

2 files changed, 105 insertions, 160 deletions

diff --git a/src/egl/drivers/demo/demo.c b/src/egl/drivers/demo/demo.c
index e8c0c1df5e..e9e6bac5b1 100644
--- a/src/egl/drivers/demo/demo.c
+++ b/src/egl/drivers/demo/demo.c
@@ -49,9 +49,8 @@ typedef struct demo_context
 
 
 static EGLBoolean
-demoInitialize(_EGLDriver *drv, EGLDisplay dpy, EGLint *major, EGLint *minor)
+demoInitialize(_EGLDriver *drv, _EGLDisplay *disp, EGLint *major, EGLint *minor)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
    _EGLScreen *scrn;
    EGLint i;
 
@@ -95,7 +94,7 @@ demoInitialize(_EGLDriver *drv, EGLDisplay dpy, EGLint *major, EGLint *minor)
 
 
 static EGLBoolean
-demoTerminate(_EGLDriver *drv, EGLDisplay dpy)
+demoTerminate(_EGLDriver *drv, _EGLDisplay *dpy)
 {
    /*DemoDriver *demo = DEMO_DRIVER(dpy);*/
    free(drv);
@@ -104,62 +103,48 @@ demoTerminate(_EGLDriver *drv, EGLDisplay dpy)
 
 
 static DemoContext *
-LookupDemoContext(EGLContext ctx)
+LookupDemoContext(_EGLContext *c)
 {
-   _EGLContext *c = _eglLookupContext(ctx);
    return (DemoContext *) c;
 }
 
 
 static DemoSurface *
-LookupDemoSurface(EGLSurface surf)
+LookupDemoSurface(_EGLSurface *s)
 {
-   _EGLSurface *s = _eglLookupSurface(surf);
    return (DemoSurface *) s;
 }
 
 
-
-static EGLContext
-demoCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, EGLContext share_list, const EGLint *attrib_list)
+static _EGLContext *
+demoCreateContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, _EGLContext *share_list, const EGLint *attrib_list)
 {
-   _EGLConfig *conf;
    DemoContext *c;
    int i;
 
-   conf = _eglLookupConfig(drv, dpy, config);
-   if (!conf) {
-      _eglError(EGL_BAD_CONFIG, "eglCreateContext");
-      return EGL_NO_CONTEXT;
-   }
-
    for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
       switch (attrib_list[i]) {
          /* no attribs defined for now */
       default:
          _eglError(EGL_BAD_ATTRIBUTE, "eglCreateContext");
-         return EGL_NO_CONTEXT;
+         return NULL;
       }
    }
 
    c = (DemoContext *) calloc(1, sizeof(DemoContext));
    if (!c)
-      return EGL_NO_CONTEXT;
+      return NULL;
 
    _eglInitContext(drv, &c->Base, conf, attrib_list);
    c->DemoStuff = 1;
    printf("demoCreateContext\n");
 
-   /* link to display */
-   _eglLinkContext(&c->Base, _eglLookupDisplay(dpy));
-   assert(_eglGetContextHandle(&c->Base));
-
-   return _eglGetContextHandle(&c->Base);
+   return &c->Base;
 }
 
 
-static EGLSurface
-demoCreateWindowSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, NativeWindowType window, const EGLint *attrib_list)
+static _EGLSurface *
+demoCreateWindowSurface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, NativeWindowType window, const EGLint *attrib_list)
 {
    int i;
    for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
@@ -167,75 +152,65 @@ demoCreateWindowSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, Nativ
          /* no attribs at this time */
       default:
          _eglError(EGL_BAD_ATTRIBUTE, "eglCreateWindowSurface");
-         return EGL_NO_SURFACE;
+         return NULL;
       }
    }
    printf("eglCreateWindowSurface()\n");
    /* XXX unfinished */
 
-   return EGL_NO_SURFACE;
+   return NULL;
 }
 
 
-static EGLSurface
-demoCreatePixmapSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, NativePixmapType pixmap, const EGLint *attrib_list)
+static _EGLSurface *
+demoCreatePixmapSurface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, NativePixmapType pixmap, const EGLint *attrib_list)
 {
-   _EGLConfig *conf;
    EGLint i;
 
-   conf = _eglLookupConfig(drv, dpy, config);
-   if (!conf) {
-      _eglError(EGL_BAD_CONFIG, "eglCreatePixmapSurface");
-      return EGL_NO_SURFACE;
-   }
-
    for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
       switch (attrib_list[i]) {
          /* no attribs at this time */
       default:
          _eglError(EGL_BAD_ATTRIBUTE, "eglCreatePixmapSurface");
-         return EGL_NO_SURFACE;
+         return NULL;
       }
    }
 
    if (conf->Attrib[EGL_SURFACE_TYPE - FIRST_ATTRIB] == 0) {
       _eglError(EGL_BAD_MATCH, "eglCreatePixmapSurface");
-      return EGL_NO_SURFACE;
+      return NULL;
    }
 
    printf("eglCreatePixmapSurface()\n");
-   return EGL_NO_SURFACE;
+   return NULL;
 }
 
 
-static EGLSurface
-demoCreatePbufferSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
+static _EGLSurface *
+demoCreatePbufferSurface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
                          const EGLint *attrib_list)
 {
    DemoSurface *surf = (DemoSurface *) calloc(1, sizeof(DemoSurface));
-   _EGLConfig *conf;
 
    if (!surf)
-      return EGL_NO_SURFACE;
+      return NULL;
 
-   conf = _eglLookupConfig(drv, dpy, config);
    if (!_eglInitSurface(drv, &surf->Base, EGL_PBUFFER_BIT,
                         conf, attrib_list)) {
       free(surf);
-      return EGL_NO_SURFACE;
+      return NULL;
    }
 
    /* a real driver would allocate the pbuffer memory here */
 
-   return surf->Base.Handle;
+   return &surf->Base;
 }
 
 
 static EGLBoolean
-demoDestroySurface(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface)
+demoDestroySurface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surface)
 {
    DemoSurface *fs = LookupDemoSurface(surface);
-   _eglUnlinkSurface(&fs->Base);
    if (!_eglIsSurfaceBound(&fs->Base))
       free(fs);
    return EGL_TRUE;
@@ -243,10 +218,9 @@ demoDestroySurface(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface)
 
 
 static EGLBoolean
-demoDestroyContext(_EGLDriver *drv, EGLDisplay dpy, EGLContext context)
+demoDestroyContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *context)
 {
    DemoContext *fc = LookupDemoContext(context);
-   _eglUnlinkContext(&fc->Base);
    if (!_eglIsContextBound(&fc->Base))
       free(fc);
    return EGL_TRUE;
@@ -254,15 +228,12 @@ demoDestroyContext(_EGLDriver *drv, EGLDisplay dpy, EGLContext context)
 
 
 static EGLBoolean
-demoMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext context)
+demoMakeCurrent(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *drawSurf, _EGLSurface *readSurf, _EGLContext *ctx)
 {
    /*DemoDriver *demo = DEMO_DRIVER(dpy);*/
-   DemoSurface *readSurf = LookupDemoSurface(read);
-   DemoSurface *drawSurf = LookupDemoSurface(draw);
-   DemoContext *ctx = LookupDemoContext(context);
    EGLBoolean b;
 
-   b = _eglMakeCurrent(drv, dpy, draw, read, context);
+   b = _eglMakeCurrent(drv, dpy, drawSurf, readSurf, ctx);
    if (!b)
       return EGL_FALSE;
 
diff --git a/src/egl/drivers/glx/egl_glx.c b/src/egl/drivers/glx/egl_glx.c
index 5ed4b6883f..607e649e5c 100644
--- a/src/egl/drivers/glx/egl_glx.c
+++ b/src/egl/drivers/glx/egl_glx.c
@@ -157,6 +157,13 @@ GLX_egl_surface(_EGLSurface *surf)
    return (struct GLX_egl_surface *) surf;
 }
 
+static int
+GLX_egl_config_id(_EGLConfig *conf)
+{
+   /* see create_configs */
+   return (int) _eglPointerToUInt(_eglGetConfigHandle(conf)) - 1;
+}
+
 static GLboolean
 get_visual_attribs(Display *dpy, XVisualInfo *vInfo,
                    struct visual_attribs *attribs)
@@ -351,7 +358,6 @@ create_configs(_EGLDisplay *disp, struct GLX_egl_driver *GLX_drv)
    int numVisuals;
    long mask;
    int i;
-   int egl_configs = 1;
    struct visual_attribs attribs;
 
    GLX_drv->fbconfigs = NULL;
@@ -441,11 +447,10 @@ end:
  * Called via eglInitialize(), GLX_drv->API.Initialize().
  */
 static EGLBoolean
-GLX_eglInitialize(_EGLDriver *drv, EGLDisplay dpy,
+GLX_eglInitialize(_EGLDriver *drv, _EGLDisplay *disp,
                    EGLint *minor, EGLint *major)
 {
    struct GLX_egl_driver *GLX_drv = GLX_egl_driver(drv);
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
 
    _eglLog(_EGL_DEBUG, "GLX: eglInitialize");
 
@@ -504,10 +509,8 @@ FreeDisplayExt(Display *dpy)
  * Called via eglTerminate(), drv->API.Terminate().
  */
 static EGLBoolean
-GLX_eglTerminate(_EGLDriver *drv, EGLDisplay dpy)
+GLX_eglTerminate(_EGLDriver *drv, _EGLDisplay *disp)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
-
    _eglLog(_EGL_DEBUG, "GLX: eglTerminate");
 
    FreeDisplayExt(disp->Xdpy);
@@ -519,42 +522,37 @@ GLX_eglTerminate(_EGLDriver *drv, EGLDisplay dpy)
 /**
  * Called via eglCreateContext(), drv->API.CreateContext().
  */
-static EGLContext
-GLX_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
-                      EGLContext share_list, const EGLint *attrib_list)
+static _EGLContext *
+GLX_eglCreateContext(_EGLDriver *drv, _EGLDisplay *disp, _EGLConfig *conf,
+                      _EGLContext *share_list, const EGLint *attrib_list)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
    struct GLX_egl_context *GLX_ctx = CALLOC_STRUCT(GLX_egl_context);
    struct GLX_egl_driver *GLX_drv = GLX_egl_driver(drv);
-   struct GLX_egl_context *GLX_ctx_shared = NULL;
-   _EGLConfig *conf;
+   struct GLX_egl_context *GLX_ctx_shared = GLX_egl_context(share_list);
 
    if (!GLX_ctx)
-      return EGL_NO_CONTEXT;
-
-   conf = _eglLookupConfig(drv, dpy, config);
-   assert(conf);
+      return NULL;
 
    if (!_eglInitContext(drv, &GLX_ctx->Base, conf, attrib_list)) {
       free(GLX_ctx);
-      return EGL_NO_CONTEXT;
-   }
-
-   if (share_list != EGL_NO_CONTEXT) {
-      _EGLContext *shareCtx = _eglLookupContext(share_list);
-      if (!shareCtx) {
-         _eglError(EGL_BAD_CONTEXT, "eglCreateContext(share_list)");
-         return EGL_FALSE;
-      }
-      GLX_ctx_shared = GLX_egl_context(shareCtx);
+      return NULL;
    }
 
 #ifdef GLX_VERSION_1_3
    if (GLX_drv->fbconfigs)
-      GLX_ctx->context = glXCreateNewContext(disp->Xdpy, GLX_drv->fbconfigs[(int)config-1], GLX_RGBA_TYPE, GLX_ctx_shared ? GLX_ctx_shared->context : NULL, GL_TRUE);
+      GLX_ctx->context =
+         glXCreateNewContext(disp->Xdpy,
+                             GLX_drv->fbconfigs[GLX_egl_config_id(conf)],
+                             GLX_RGBA_TYPE,
+                             GLX_ctx_shared ? GLX_ctx_shared->context : NULL,
+                             GL_TRUE);
    else
 #endif
-      GLX_ctx->context = glXCreateContext(disp->Xdpy, &GLX_drv->visuals[(int)config-1], GLX_ctx_shared ? GLX_ctx_shared->context : NULL, GL_TRUE);
+      GLX_ctx->context =
+         glXCreateContext(disp->Xdpy,
+                          &GLX_drv->visuals[GLX_egl_config_id(conf)],
+                          GLX_ctx_shared ? GLX_ctx_shared->context : NULL,
+                          GL_TRUE);
    if (!GLX_ctx->context)
       return EGL_FALSE;
 
@@ -564,7 +562,7 @@ GLX_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
       return EGL_FALSE;
 #endif
 
-   return _eglLinkContext(&GLX_ctx->Base, disp);
+   return &GLX_ctx->Base;
 }
 
 
@@ -572,18 +570,14 @@ GLX_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
  * Called via eglMakeCurrent(), drv->API.MakeCurrent().
  */
 static EGLBoolean
-GLX_eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d,
-                    EGLSurface r, EGLContext context)
+GLX_eglMakeCurrent(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *dsurf,
+                   _EGLSurface *rsurf, _EGLContext *ctx)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
-   _EGLContext *ctx = _eglLookupContext(context);
-   _EGLSurface *dsurf = _eglLookupSurface(d);
-   _EGLSurface *rsurf = _eglLookupSurface(r);
    struct GLX_egl_surface *GLX_dsurf = GLX_egl_surface(dsurf);
    struct GLX_egl_surface *GLX_rsurf = GLX_egl_surface(rsurf);
    struct GLX_egl_context *GLX_ctx = GLX_egl_context(ctx);
 
-   if (!_eglMakeCurrent(drv, dpy, d, r, context))
+   if (!_eglMakeCurrent(drv, disp, dsurf, rsurf, ctx))
       return EGL_FALSE;
 
 #ifdef GLX_VERSION_1_3
@@ -612,104 +606,86 @@ get_drawable_size(Display *dpy, Drawable d, uint *width, uint *height)
 /**
  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
  */
-static EGLSurface
-GLX_eglCreateWindowSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
+static _EGLSurface *
+GLX_eglCreateWindowSurface(_EGLDriver *drv, _EGLDisplay *disp, _EGLConfig *conf,
                             NativeWindowType window, const EGLint *attrib_list)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
    struct GLX_egl_surface *GLX_surf;
    uint width, height;
-   _EGLConfig *conf;
-
-   conf = _eglLookupConfig(drv, dpy, config);
-   assert(conf);
 
    GLX_surf = CALLOC_STRUCT(GLX_egl_surface);
    if (!GLX_surf)
-      return EGL_NO_SURFACE;
+      return NULL;
 
    if (!_eglInitSurface(drv, &GLX_surf->Base, EGL_WINDOW_BIT,
                         conf, attrib_list)) {
       free(GLX_surf);
-      return EGL_FALSE;
+      return NULL;
    }
 
-   _eglLinkSurface(&GLX_surf->Base, disp);
-
    GLX_surf->drawable = window;
    get_drawable_size(disp->Xdpy, window, &width, &height);
    GLX_surf->Base.Width = width;
    GLX_surf->Base.Height = height;
 
-   return _eglGetSurfaceHandle(&GLX_surf->Base);
+   return &GLX_surf->Base;
 }
 
 #ifdef GLX_VERSION_1_3
-static EGLSurface
-GLX_eglCreatePixmapSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config, 
+static _EGLSurface *
+GLX_eglCreatePixmapSurface(_EGLDriver *drv, _EGLDisplay *disp, _EGLConfig *conf,
 			   NativePixmapType pixmap, const EGLint *attrib_list)
 {
    struct GLX_egl_driver *GLX_drv = GLX_egl_driver(drv);
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
    struct GLX_egl_surface *GLX_surf;
-   _EGLConfig *conf;
    int i;
 
-   conf = _eglLookupConfig(drv, dpy, config);
-   assert(conf);
-
    GLX_surf = CALLOC_STRUCT(GLX_egl_surface);
    if (!GLX_surf)
-      return EGL_NO_SURFACE;
+      return NULL;
 
    if (!_eglInitSurface(drv, &GLX_surf->Base, EGL_PIXMAP_BIT,
                         conf, attrib_list)) {
       free(GLX_surf);
-      return EGL_FALSE;
+      return NULL;
    }
 
-   _eglLinkSurface(&GLX_surf->Base, disp);
-
    for (i = 0; attrib_list && attrib_list[i] != EGL_NONE; i++) {
       switch (attrib_list[i]) {
          /* no attribs at this time */
       default:
          _eglError(EGL_BAD_ATTRIBUTE, "eglCreatePixmapSurface");
-         return EGL_NO_SURFACE;
+         return NULL;
       }
    }
 
-   GLX_surf->drawable = glXCreatePixmap(disp->Xdpy, GLX_drv->fbconfigs[(int)config-1], pixmap, NULL);
+   GLX_surf->drawable =
+      glXCreatePixmap(disp->Xdpy,
+                      GLX_drv->fbconfigs[GLX_egl_config_id(conf)],
+                      pixmap, NULL);
 
-   return _eglGetSurfaceHandle(&GLX_surf->Base);
+   return &GLX_surf->Base;
 }
 
-static EGLSurface
-GLX_eglCreatePbufferSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
+static _EGLSurface *
+GLX_eglCreatePbufferSurface(_EGLDriver *drv, _EGLDisplay *disp, _EGLConfig *conf,
                             const EGLint *attrib_list)
 {
    struct GLX_egl_driver *GLX_drv = GLX_egl_driver(drv);
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
    struct GLX_egl_surface *GLX_surf;
-   _EGLConfig *conf;
    int attribs[5];
    int i = 0, j = 0;
 
-   conf = _eglLookupConfig(drv, dpy, config);
-   assert(conf);
-
    GLX_surf = CALLOC_STRUCT(GLX_egl_surface);
    if (!GLX_surf)
-      return EGL_NO_SURFACE;
+      return NULL;
 
    if (!_eglInitSurface(drv, &GLX_surf->Base, EGL_PBUFFER_BIT,
                         conf, attrib_list)) {
       free(GLX_surf);
-      return EGL_NO_SURFACE;
+      return NULL;
    }
 
-   _eglLinkSurface(&GLX_surf->Base, disp);
-
    while(attrib_list[i] != EGL_NONE) {
       switch (attrib_list[i]) {
          case EGL_WIDTH:
@@ -725,38 +701,40 @@ GLX_eglCreatePbufferSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
    }
    attribs[j++] = 0;
 
-   GLX_surf->drawable = glXCreatePbuffer(disp->Xdpy, GLX_drv->fbconfigs[(int)config-1], attribs);
+   GLX_surf->drawable =
+      glXCreatePbuffer(disp->Xdpy,
+                       GLX_drv->fbconfigs[GLX_egl_config_id(conf)], attribs);
 
-   return _eglGetSurfaceHandle(&GLX_surf->Base);
+   return &GLX_surf->Base;
 }
 #endif
 
 static EGLBoolean
-GLX_eglDestroySurface(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface)
+GLX_eglDestroySurface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
-   _EGLSurface *surf = _eglLookupSurface(surface);
-   return EGL_TRUE;
-   if (surf) {
-      _eglUnlinkSurface(surf);
-      if (!_eglIsSurfaceBound(surf))
-         free(surf);
-
-      return EGL_TRUE;
-   }
-   else {
-      _eglError(EGL_BAD_SURFACE, "eglDestroySurface");
-      return EGL_FALSE;
+   if (!_eglIsSurfaceBound(surf)) {
+      struct GLX_egl_surface *GLX_surf = GLX_egl_surface(surf);
+      switch (surf->Type) {
+      case EGL_PBUFFER_BIT:
+         glXDestroyPbuffer(disp->Xdpy, GLX_surf->drawable);
+         break;
+      case EGL_PIXMAP_BIT:
+         glXDestroyPixmap(disp->Xdpy, GLX_surf->drawable);
+         break;
+      default:
+         break;
+      }
+      free(surf);
    }
+
+   return EGL_TRUE;
 }
 
 
 static EGLBoolean
-GLX_eglBindTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
+GLX_eglBindTexImage(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
                      EGLint buffer)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
-   _EGLSurface *surf = _eglLookupSurface(surface);
    struct GLX_egl_surface *GLX_surf = GLX_egl_surface(surf);
 
    /* buffer ?? */
@@ -767,11 +745,9 @@ GLX_eglBindTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
 
 
 static EGLBoolean
-GLX_eglReleaseTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
+GLX_eglReleaseTexImage(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
                         EGLint buffer)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
-   _EGLSurface *surf = _eglLookupSurface(surface);
    struct GLX_egl_surface *GLX_surf = GLX_egl_surface(surf);
 
    /* buffer ?? */
@@ -782,16 +758,14 @@ GLX_eglReleaseTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
 
 
 static EGLBoolean
-GLX_eglSwapBuffers(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw)
+GLX_eglSwapBuffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 {
-   _EGLDisplay *disp = _eglLookupDisplay(dpy);
-   _EGLSurface *surf = _eglLookupSurface(draw);
-   struct GLX_egl_surface *GLX_surf = GLX_egl_surface(surf);
+   struct GLX_egl_surface *GLX_surf = GLX_egl_surface(draw);
 
    _eglLog(_EGL_DEBUG, "GLX: EGL SwapBuffers 0x%x",draw);
 
    /* error checking step: */
-   if (!_eglSwapBuffers(drv, dpy, draw))
+   if (!_eglSwapBuffers(drv, disp, draw))
       return EGL_FALSE;
 
    glXSwapBuffers(disp->Xdpy, GLX_surf->drawable);
@@ -810,13 +784,14 @@ GLX_eglGetProcAddress(const char *procname)
     * some point.
     */
    _EGLProc (*get_proc_addr)(const char *procname);
+   _EGLProc proc_addr;
    get_proc_addr = dlsym(NULL, "st_get_proc_address");
    if (get_proc_addr)
       return get_proc_addr(procname);
 
-   get_proc_addr = glXGetProcAddress((const GLubyte *)procname);
-   if (get_proc_addr)
-      return get_proc_addr(procname);
+   proc_addr = glXGetProcAddress((const GLubyte *)procname);
+   if (proc_addr)
+      return proc_addr;
 
    return (_EGLProc)dlsym(NULL, procname);
 }
@@ -831,7 +806,6 @@ _eglMain(_EGLDisplay *disp, const char *args)
 {
    struct GLX_egl_driver *GLX_drv = CALLOC_STRUCT(GLX_egl_driver);
    char *env;
-   int maj = 0, min = 0;
 
    if (!GLX_drv)
       return NULL;