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>

1 files changed, 495 insertions, 174 deletions

diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index fde6b7316c..e8a5b18912 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -29,7 +29,6 @@
  */
 
 
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -39,7 +38,9 @@
 #include "eglglobals.h"
 #include "egldriver.h"
 #include "eglsurface.h"
-
+#include "eglconfig.h"
+#include "eglscreen.h"
+#include "eglmode.h"
 
 
 /**
@@ -67,232 +68,481 @@ eglGetDisplay(NativeDisplayType nativeDisplay)
 EGLBoolean EGLAPIENTRY
 eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
 {
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLDriver *drv;
    EGLint major_int, minor_int;
 
-   if (dpy) {
-      EGLBoolean retVal;
-      _EGLDisplay *dpyPriv = _eglLookupDisplay(dpy);
-      if (!dpyPriv) {
-         return EGL_FALSE;
-      }
-      dpyPriv->Driver = _eglOpenDriver(dpyPriv,
-                                       dpyPriv->DriverName,
-                                       dpyPriv->DriverArgs);
-      if (!dpyPriv->Driver) {
-         return EGL_FALSE;
-      }
-      /* Initialize the particular driver now */
-      retVal = dpyPriv->Driver->API.Initialize(dpyPriv->Driver, dpy,
-                                               &major_int, &minor_int);
-
-      dpyPriv->Driver->APImajor = major_int;
-      dpyPriv->Driver->APIminor = minor_int;
-      snprintf(dpyPriv->Driver->Version, sizeof(dpyPriv->Driver->Version),
-               "%d.%d (%s)", major_int, minor_int, dpyPriv->Driver->Name);
-
-      /* Update applications version of major and minor if not NULL */
-      if((major != NULL) && (minor != NULL))
-      {
-         *major = major_int;
-         *minor = minor_int;
+   if (!disp)
+      return _eglError(EGL_BAD_DISPLAY, __FUNCTION__);
+
+   drv = disp->Driver;
+   if (!drv) {
+      drv = _eglOpenDriver(disp, disp->DriverName, disp->DriverArgs);
+      if (!drv)
+         return _eglError(EGL_NOT_INITIALIZED, __FUNCTION__);
+
+      /* Initialize the particular display now */
+      if (!drv->API.Initialize(drv, disp, &major_int, &minor_int)) {
+         _eglCloseDriver(drv, disp);
+         return _eglError(EGL_NOT_INITIALIZED, __FUNCTION__);
       }
 
-      return retVal;
+      drv->APImajor = major_int;
+      drv->APIminor = minor_int;
+      snprintf(drv->Version, sizeof(drv->Version),
+               "%d.%d (%s)", major_int, minor_int, drv->Name);
+
+      disp->Driver = drv;
+   } else {
+      major_int = drv->APImajor;
+      minor_int = drv->APIminor;
    }
-   return EGL_FALSE;
+
+   /* Update applications version of major and minor if not NULL */
+   if ((major != NULL) && (minor != NULL)) {
+      *major = major_int;
+      *minor = minor_int;
+   }
+
+   return EGL_TRUE;
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglTerminate(EGLDisplay dpy)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   if (drv)
-      return _eglCloseDriver(drv, dpy);
-   else
-      return EGL_FALSE;
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLDriver *drv;
+
+   if (!disp)
+      return _eglError(EGL_BAD_DISPLAY, __FUNCTION__);
+
+   drv = disp->Driver;
+   if (drv) {
+      /* TODO drv->API.Terminate should be called here */
+      _eglCloseDriver(drv, disp);
+      disp->Driver = NULL;
+   }
+
+   return EGL_TRUE;
+}
+
+
+/**
+ * A bunch of check functions and declare macros to simply error checking.
+ */
+static INLINE _EGLDriver *
+_eglCheckDisplay(_EGLDisplay *disp, const char *msg)
+{
+   if (!disp) {
+      _eglError(EGL_BAD_DISPLAY, msg);
+      return NULL;
+   }
+   if (!disp->Driver) {
+      _eglError(EGL_NOT_INITIALIZED, msg);
+      return NULL;
+   }
+   return disp->Driver;
+}
+
+
+static INLINE _EGLDriver *
+_eglCheckSurface(_EGLDisplay *disp, _EGLSurface *surf, const char *msg)
+{
+   _EGLDriver *drv = _eglCheckDisplay(disp, msg);
+   if (!drv)
+      return NULL;
+   if (!surf) {
+      _eglError(EGL_BAD_SURFACE, msg);
+      return NULL;
+   }
+   return drv;
 }
 
 
+static INLINE _EGLDriver *
+_eglCheckContext(_EGLDisplay *disp, _EGLContext *context, const char *msg)
+{
+   _EGLDriver *drv = _eglCheckDisplay(disp, msg);
+   if (!drv)
+      return NULL;
+   if (!context) {
+      _eglError(EGL_BAD_CONTEXT, msg);
+      return NULL;
+   }
+   return drv;
+}
+
+
+static INLINE _EGLDriver *
+_eglCheckConfig(_EGLDisplay *disp, _EGLConfig *conf, const char *msg)
+{
+   _EGLDriver *drv = _eglCheckDisplay(disp, msg);
+   if (!drv)
+      return NULL;
+   if (!conf) {
+      _eglError(EGL_BAD_CONFIG, msg);
+      return NULL;
+   }
+   return drv;
+}
+
+
+#define _EGL_DECLARE_DD(dpy)                                   \
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
+   _EGLDriver *drv;                                            \
+   do {                                                        \
+      drv = _eglCheckDisplay(disp, __FUNCTION__);              \
+      if (!drv)                                                \
+         return EGL_FALSE;                                     \
+   } while (0)
+
+
+#define _EGL_DECLARE_DD_AND_SURFACE(dpy, surface)              \
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
+   _EGLSurface *surf = _eglLookupSurface((surface), disp);     \
+   _EGLDriver *drv;                                            \
+   do {                                                        \
+      drv = _eglCheckSurface(disp, surf, __FUNCTION__);        \
+      if (!drv)                                                \
+         return EGL_FALSE;                                     \
+   } while (0)
+
+
+#define _EGL_DECLARE_DD_AND_CONTEXT(dpy, ctx)                  \
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
+   _EGLContext *context = _eglLookupContext((ctx), disp);      \
+   _EGLDriver *drv;                                            \
+   do {                                                        \
+      drv = _eglCheckContext(disp, context, __FUNCTION__);     \
+      if (!drv)                                                \
+         return EGL_FALSE;                                     \
+   } while (0)
+
+
+#ifdef EGL_MESA_screen_surface
+
+
+static INLINE _EGLDriver *
+_eglCheckScreen(_EGLDisplay *disp, _EGLScreen *scrn, const char *msg)
+{
+   _EGLDriver *drv = _eglCheckDisplay(disp, msg);
+   if (!drv)
+      return NULL;
+   if (!scrn) {
+      _eglError(EGL_BAD_SCREEN_MESA, msg);
+      return NULL;
+   }
+   return drv;
+}
+
+
+static INLINE _EGLDriver *
+_eglCheckMode(_EGLDisplay *disp, _EGLMode *m, const char *msg)
+{
+   _EGLDriver *drv = _eglCheckDisplay(disp, msg);
+   if (!drv)
+      return NULL;
+   if (!m) {
+      _eglError(EGL_BAD_MODE_MESA, msg);
+      return NULL;
+   }
+   return drv;
+}
+
+
+#define _EGL_DECLARE_DD_AND_SCREEN(dpy, screen)                \
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
+   _EGLScreen *scrn = _eglLookupScreen((screen), disp);        \
+   _EGLDriver *drv;                                            \
+   do {                                                        \
+      drv = _eglCheckScreen(disp, scrn, __FUNCTION__);         \
+      if (!drv)                                                \
+         return EGL_FALSE;                                     \
+   } while (0)
+
+
+#define _EGL_DECLARE_DD_AND_MODE(dpy, mode)                    \
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);                 \
+   _EGLMode *m = _eglLookupMode((mode), disp);                 \
+   _EGLDriver *drv;                                            \
+   do {                                                        \
+      drv = _eglCheckMode(disp, m, __FUNCTION__);              \
+      if (!drv)                                                \
+         return EGL_FALSE;                                     \
+   } while (0)
+
+
+#endif /* EGL_MESA_screen_surface */
+
+
 const char * EGLAPIENTRY
 eglQueryString(EGLDisplay dpy, EGLint name)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   if (drv)
-      return drv->API.QueryString(drv, dpy, name);
-   else
-      return NULL;
+   _EGL_DECLARE_DD(dpy);
+   return drv->API.QueryString(drv, disp, name);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglGetConfigs(EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config)
+eglGetConfigs(EGLDisplay dpy, EGLConfig *configs,
+              EGLint config_size, EGLint *num_config)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   /* XXX check drv for null in remaining functions */
-   return drv->API.GetConfigs(drv, dpy, configs, config_size, num_config);
+   _EGL_DECLARE_DD(dpy);
+   return drv->API.GetConfigs(drv, disp, configs, config_size, num_config);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglChooseConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config)
+eglChooseConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs,
+                EGLint config_size, EGLint *num_config)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.ChooseConfig(drv, dpy, attrib_list, configs, config_size, num_config);
+   _EGL_DECLARE_DD(dpy);
+   return drv->API.ChooseConfig(drv, disp, attrib_list, configs,
+                                config_size, num_config);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value)
+eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config,
+                   EGLint attribute, EGLint *value)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.GetConfigAttrib(drv, dpy, config, attribute, value);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLConfig *conf = _eglLookupConfig(config, disp);
+   _EGLDriver *drv;
+
+   drv = _eglCheckConfig(disp, conf, __FUNCTION__);
+   if (!drv)
+      return EGL_FALSE;
+
+   return drv->API.GetConfigAttrib(drv, disp, conf, attribute, value);
 }
 
 
 EGLContext EGLAPIENTRY
-eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_list, const EGLint *attrib_list)
-{
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.CreateContext(drv, dpy, config, share_list, attrib_list);
+eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_list,
+                 const EGLint *attrib_list)
+{
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLConfig *conf = _eglLookupConfig(config, disp);
+   _EGLContext *share = _eglLookupContext(share_list, disp);
+   _EGLDriver *drv;
+   _EGLContext *context;
+
+   drv = _eglCheckConfig(disp, conf, __FUNCTION__);
+   if (!drv)
+      return EGL_NO_CONTEXT;
+   if (!share && share_list != EGL_NO_CONTEXT) {
+      _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
+      return EGL_NO_CONTEXT;
+   }
+
+   context = drv->API.CreateContext(drv, disp, conf, share, attrib_list);
+   if (context)
+      return _eglLinkContext(context, disp);
+   else
+      return EGL_NO_CONTEXT;
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.DestroyContext(drv, dpy, ctx);
+   _EGL_DECLARE_DD_AND_CONTEXT(dpy, ctx);
+   _eglUnlinkContext(context);
+   return drv->API.DestroyContext(drv, disp, context);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx)
+eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read,
+               EGLContext ctx)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.MakeCurrent(drv, dpy, draw, read, ctx);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLContext *context = _eglLookupContext(ctx, disp);
+   _EGLSurface *draw_surf = _eglLookupSurface(draw, disp);
+   _EGLSurface *read_surf = _eglLookupSurface(read, disp);
+   _EGLDriver *drv;
+
+   drv = _eglCheckDisplay(disp, __FUNCTION__);
+   if (!drv)
+      return EGL_FALSE;
+   if (!context && ctx != EGL_NO_CONTEXT)
+      return _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
+   if ((!draw_surf && draw != EGL_NO_SURFACE) ||
+       (!read_surf && read != EGL_NO_SURFACE))
+      return _eglError(EGL_BAD_SURFACE, __FUNCTION__);
+
+   return drv->API.MakeCurrent(drv, disp, draw_surf, read_surf, context);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglQueryContext(EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint *value)
+eglQueryContext(EGLDisplay dpy, EGLContext ctx,
+                EGLint attribute, EGLint *value)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.QueryContext(drv, dpy, ctx, attribute, value);
+   _EGL_DECLARE_DD_AND_CONTEXT(dpy, ctx);
+   return drv->API.QueryContext(drv, disp, context, attribute, value);
 }
 
 
 EGLSurface EGLAPIENTRY
-eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config, NativeWindowType window, const EGLint *attrib_list)
+eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config,
+                       NativeWindowType window, const EGLint *attrib_list)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.CreateWindowSurface(drv, dpy, config, window, attrib_list);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLConfig *conf = _eglLookupConfig(config, disp);
+   _EGLDriver *drv;
+   _EGLSurface *surf;
+
+   drv = _eglCheckConfig(disp, conf, __FUNCTION__);
+   if (!drv)
+      return EGL_NO_SURFACE;
+
+   surf = drv->API.CreateWindowSurface(drv, disp, conf, window, attrib_list);
+   if (surf)
+      return _eglLinkSurface(surf, disp);
+   else
+      return EGL_NO_SURFACE;
 }
 
 
 EGLSurface EGLAPIENTRY
-eglCreatePixmapSurface(EGLDisplay dpy, EGLConfig config, NativePixmapType pixmap, const EGLint *attrib_list)
+eglCreatePixmapSurface(EGLDisplay dpy, EGLConfig config,
+                       NativePixmapType pixmap, const EGLint *attrib_list)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.CreatePixmapSurface(drv, dpy, config, pixmap, attrib_list);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLConfig *conf = _eglLookupConfig(config, disp);
+   _EGLDriver *drv;
+   _EGLSurface *surf;
+
+   drv = _eglCheckConfig(disp, conf, __FUNCTION__);
+   if (!drv)
+      return EGL_NO_SURFACE;
+
+   surf = drv->API.CreatePixmapSurface(drv, disp, conf, pixmap, attrib_list);
+   if (surf)
+      return _eglLinkSurface(surf, disp);
+   else
+      return EGL_NO_SURFACE;
 }
 
 
 EGLSurface EGLAPIENTRY
-eglCreatePbufferSurface(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list)
+eglCreatePbufferSurface(EGLDisplay dpy, EGLConfig config,
+                        const EGLint *attrib_list)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.CreatePbufferSurface(drv, dpy, config, attrib_list);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLConfig *conf = _eglLookupConfig(config, disp);
+   _EGLDriver *drv;
+   _EGLSurface *surf;
+
+   drv = _eglCheckConfig(disp, conf, __FUNCTION__);
+   if (!drv)
+      return EGL_NO_SURFACE;
+
+   surf = drv->API.CreatePbufferSurface(drv, disp, conf, attrib_list);
+   if (surf)
+      return _eglLinkSurface(surf, disp);
+   else
+      return EGL_NO_SURFACE;
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.DestroySurface(drv, dpy, surface);
+   _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
+   _eglUnlinkSurface(surf);
+   return drv->API.DestroySurface(drv, disp, surf);
 }
 
-
 EGLBoolean EGLAPIENTRY
-eglQuerySurface(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint *value)
+eglQuerySurface(EGLDisplay dpy, EGLSurface surface,
+                EGLint attribute, EGLint *value)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.QuerySurface(drv, dpy, surface, attribute, value);
+   _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
+   return drv->API.QuerySurface(drv, disp, surf, attribute, value);
 }
 
-
 EGLBoolean EGLAPIENTRY
-eglSurfaceAttrib(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
+eglSurfaceAttrib(EGLDisplay dpy, EGLSurface surface,
+                 EGLint attribute, EGLint value)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.SurfaceAttrib(drv, dpy, surface, attribute, value);
+   _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
+   return drv->API.SurfaceAttrib(drv, disp, surf, attribute, value);
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglBindTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.BindTexImage(drv, dpy, surface, buffer);
+   _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
+   return drv->API.BindTexImage(drv, disp, surf, buffer);
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglReleaseTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.ReleaseTexImage(drv, dpy, surface, buffer);
+   _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
+   return drv->API.ReleaseTexImage(drv, disp, surf, buffer);
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglSwapInterval(EGLDisplay dpy, EGLint interval)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.SwapInterval(drv, dpy, interval);
+   _EGL_DECLARE_DD(dpy);
+   return drv->API.SwapInterval(drv, disp, interval);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglSwapBuffers(EGLDisplay dpy, EGLSurface draw)
+eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.SwapBuffers(drv, dpy, draw);
+   _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
+   return drv->API.SwapBuffers(drv, disp, surf);
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglCopyBuffers(EGLDisplay dpy, EGLSurface surface, NativePixmapType target)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.CopyBuffers(drv, dpy, surface, target);
+   _EGL_DECLARE_DD_AND_SURFACE(dpy, surface);
+   return drv->API.CopyBuffers(drv, disp, surf, target);
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglWaitGL(void)
 {
-   EGLDisplay dpy = eglGetCurrentDisplay();
-   if (dpy != EGL_NO_DISPLAY) {
-      _EGLDriver *drv = _eglLookupDriver(dpy);
-      return drv->API.WaitGL(drv, dpy);
-   }
-   else
-      return EGL_FALSE;
+   _EGLDisplay *disp = _eglGetCurrentDisplay();
+   _EGLDriver *drv;
+
+   if (!disp)
+      return EGL_TRUE;
+
+   /* a current display is always initialized */
+   drv = disp->Driver;
+
+   return drv->API.WaitGL(drv, disp);
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglWaitNative(EGLint engine)
 {
-   EGLDisplay dpy = eglGetCurrentDisplay();
-   if (dpy != EGL_NO_DISPLAY) {
-      _EGLDriver *drv = _eglLookupDriver(dpy);
-      return drv->API.WaitNative(drv, dpy, engine);
-   }
-   else
-      return EGL_FALSE;
+   _EGLDisplay *disp = _eglGetCurrentDisplay();
+   _EGLDriver *drv;
+
+   if (!disp)
+      return EGL_TRUE;
+
+   /* a current display is always initialized */
+   drv = disp->Driver;
+
+   return drv->API.WaitNative(drv, disp, engine);
 }
 
 
@@ -420,111 +670,168 @@ eglChooseModeMESA(EGLDisplay dpy, EGLScreenMESA screen,
                   const EGLint *attrib_list, EGLModeMESA *modes,
                   EGLint modes_size, EGLint *num_modes)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   if (drv)
-      return drv->API.ChooseModeMESA(drv, dpy, screen, attrib_list, modes, modes_size, num_modes);
-   else
-      return EGL_FALSE;
+   _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
+   return drv->API.ChooseModeMESA(drv, disp, scrn, attrib_list,
+                                  modes, modes_size, num_modes);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglGetModesMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLModeMESA *modes, EGLint mode_size, EGLint *num_mode)
+eglGetModesMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLModeMESA *modes,
+                EGLint mode_size, EGLint *num_mode)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   if (drv)
-      return drv->API.GetModesMESA(drv, dpy, screen, modes, mode_size, num_mode);
-   else
-      return EGL_FALSE;
+   _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
+   return drv->API.GetModesMESA(drv, disp, scrn, modes, mode_size, num_mode);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglGetModeAttribMESA(EGLDisplay dpy, EGLModeMESA mode, EGLint attribute, EGLint *value)
+eglGetModeAttribMESA(EGLDisplay dpy, EGLModeMESA mode,
+                     EGLint attribute, EGLint *value)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   if (drv)
-      return drv->API.GetModeAttribMESA(drv, dpy, mode, attribute, value);
-   else
-      return EGL_FALSE;
+   _EGL_DECLARE_DD_AND_MODE(dpy, mode);
+   return drv->API.GetModeAttribMESA(drv, disp, m, attribute, value);
 }
 
 
 EGLBoolean EGLAPIENTRY
-eglCopyContextMESA(EGLDisplay dpy, EGLContext source, EGLContext dest, EGLint mask)
-{
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   if (drv)
-      return drv->API.CopyContextMESA(drv, dpy, source, dest, mask);
-   else
+eglCopyContextMESA(EGLDisplay dpy, EGLContext source, EGLContext dest,
+                   EGLint mask)
+{
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLContext *source_context = _eglLookupContext(source, disp);
+   _EGLContext *dest_context = _eglLookupContext(dest, disp);
+   _EGLDriver *drv;
+
+   drv = _eglCheckContext(disp, source_context, __FUNCTION__);
+   if (!drv || !dest_context) {
+      if (drv)
+         _eglError(EGL_BAD_CONTEXT, __FUNCTION__);
       return EGL_FALSE;
+   }
+
+   return drv->API.CopyContextMESA(drv, disp, source_context, dest_context,
+                                   mask);
 }
 
 
 EGLBoolean
-eglGetScreensMESA(EGLDisplay dpy, EGLScreenMESA *screens, EGLint max_screens, EGLint *num_screens)
+eglGetScreensMESA(EGLDisplay dpy, EGLScreenMESA *screens,
+                  EGLint max_screens, EGLint *num_screens)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   if (drv)
-      return drv->API.GetScreensMESA(drv, dpy, screens, max_screens, num_screens);
-   else
-      return EGL_FALSE;
+   _EGL_DECLARE_DD(dpy);
+   return drv->API.GetScreensMESA(drv, disp, screens,
+                                  max_screens, num_screens);
 }
 
 
 EGLSurface
-eglCreateScreenSurfaceMESA(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list)
+eglCreateScreenSurfaceMESA(EGLDisplay dpy, EGLConfig config,
+                           const EGLint *attrib_list)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.CreateScreenSurfaceMESA(drv, dpy, config, attrib_list);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLConfig *conf = _eglLookupConfig(config, disp);
+   _EGLDriver *drv;
+   _EGLSurface *surf;
+
+   drv = _eglCheckConfig(disp, conf, __FUNCTION__);
+   if (!drv)
+      return EGL_NO_SURFACE;
+
+   surf = drv->API.CreateScreenSurfaceMESA(drv, disp, conf, attrib_list);
+   if (surf)
+      return _eglLinkSurface(surf, disp);
+   else
+      return EGL_NO_SURFACE;
 }
 
 
 EGLBoolean
-eglShowScreenSurfaceMESA(EGLDisplay dpy, EGLint screen, EGLSurface surface, EGLModeMESA mode)
+eglShowScreenSurfaceMESA(EGLDisplay dpy, EGLint screen,
+                         EGLSurface surface, EGLModeMESA mode)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.ShowScreenSurfaceMESA(drv, dpy, screen, surface, mode);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
+   _EGLSurface *surf = _eglLookupSurface(surface, disp);
+   _EGLMode *m = _eglLookupMode(mode, disp);
+   _EGLDriver *drv;
+
+   drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
+   if (!drv)
+      return EGL_FALSE;
+   if (!surf && surface != EGL_NO_SURFACE)
+      return _eglError(EGL_BAD_SURFACE, __FUNCTION__);
+   if (!m && mode != EGL_NO_MODE_MESA)
+      return _eglError(EGL_BAD_MODE_MESA, __FUNCTION__);
+
+   return drv->API.ShowScreenSurfaceMESA(drv, disp, scrn, surf, m);
 }
 
 
 EGLBoolean
 eglScreenPositionMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLint x, EGLint y)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.ScreenPositionMESA(drv, dpy, screen, x, y);
+   _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
+   return drv->API.ScreenPositionMESA(drv, disp, scrn, x, y);
 }
 
 
 EGLBoolean
-eglQueryScreenMESA( EGLDisplay dpy, EGLScreenMESA screen, EGLint attribute, EGLint *value)
+eglQueryScreenMESA(EGLDisplay dpy, EGLScreenMESA screen,
+                   EGLint attribute, EGLint *value)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.QueryScreenMESA(drv, dpy, screen, attribute, value);
+   _EGL_DECLARE_DD_AND_SCREEN(dpy, screen);
+   return drv->API.QueryScreenMESA(drv, disp, scrn, attribute, value);
 }
 
 
 EGLBoolean
-eglQueryScreenSurfaceMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLSurface *surface)
+eglQueryScreenSurfaceMESA(EGLDisplay dpy, EGLScreenMESA screen,
+                          EGLSurface *surface)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.QueryScreenSurfaceMESA(drv, dpy, screen, surface);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
+   _EGLDriver *drv;
+   _EGLSurface *surf;
+
+   drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
+   if (!drv)
+      return EGL_FALSE;
+
+   if (drv->API.QueryScreenSurfaceMESA(drv, disp, scrn, &surf) != EGL_TRUE)
+      surf = NULL;
+   if (surface)
+      *surface = _eglGetSurfaceHandle(surf);
+   return (surf != NULL);
 }
 
 
 EGLBoolean
 eglQueryScreenModeMESA(EGLDisplay dpy, EGLScreenMESA screen, EGLModeMESA *mode)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.QueryScreenModeMESA(drv, dpy, screen, mode);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLScreen *scrn = _eglLookupScreen((EGLScreenMESA) screen, disp);
+   _EGLDriver *drv;
+   _EGLMode *m;
+
+   drv = _eglCheckScreen(disp, scrn, __FUNCTION__);
+   if (!drv)
+      return EGL_FALSE;
+
+   if (drv->API.QueryScreenModeMESA(drv, disp, scrn, &m) != EGL_TRUE)
+      m = NULL;
+   if (mode)
+      *mode = m->Handle;
+
+   return (m != NULL);
 }
 
 
 const char *
 eglQueryModeStringMESA(EGLDisplay dpy, EGLModeMESA mode)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.QueryModeStringMESA(drv, dpy, mode);
+   _EGL_DECLARE_DD_AND_MODE(dpy, mode);
+   return drv->API.QueryModeStringMESA(drv, disp, m);
 }
 
 
@@ -605,27 +912,37 @@ eglCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype,
                                  EGLClientBuffer buffer, EGLConfig config,
                                  const EGLint *attrib_list)
 {
-   _EGLDriver *drv = _eglLookupDriver(dpy);
-   return drv->API.CreatePbufferFromClientBuffer(drv, dpy, buftype, buffer,
-                                                 config, attrib_list);
+   _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   _EGLConfig *conf = _eglLookupConfig(config, disp);
+   _EGLDriver *drv;
+   _EGLSurface *surf;
+
+   drv = _eglCheckConfig(disp, conf, __FUNCTION__);
+   if (!drv)
+      return EGL_NO_SURFACE;
+
+   surf = drv->API.CreatePbufferFromClientBuffer(drv, disp, buftype, buffer,
+                                                 conf, attrib_list);
+   if (surf)
+      return _eglLinkSurface(surf, disp);
+   else
+      return EGL_NO_SURFACE;
 }
 
 
 EGLBoolean
 eglReleaseThread(void)
 {
-   EGLDisplay dpy;
-
-   if (_eglIsCurrentThreadDummy())
-      return EGL_TRUE;
-
-   dpy = eglGetCurrentDisplay();
-   if (dpy) {
-      _EGLDriver *drv = _eglLookupDriver(dpy);
-      /* unbind context */
-      (void) drv->API.MakeCurrent(drv, dpy, EGL_NO_SURFACE,
-                                  EGL_NO_SURFACE, EGL_NO_CONTEXT);
+   /* unbind current context */
+   if (!_eglIsCurrentThreadDummy()) {
+      _EGLDisplay *disp = _eglGetCurrentDisplay();
+      _EGLDriver *drv;
+      if (disp) {
+         drv = disp->Driver;
+         (void) drv->API.MakeCurrent(drv, disp, NULL, NULL, NULL);
+      }
    }
+
    _eglDestroyCurrentThread();
    return EGL_TRUE;
 }
@@ -634,13 +951,17 @@ eglReleaseThread(void)
 EGLBoolean
 eglWaitClient(void)
 {
-   EGLDisplay dpy = eglGetCurrentDisplay();
-   if (dpy != EGL_NO_DISPLAY) {
-      _EGLDriver *drv = _eglLookupDriver(dpy);
-      return drv->API.WaitClient(drv, dpy);
-   }
-   else
-      return EGL_FALSE;
+   _EGLDisplay *disp = _eglGetCurrentDisplay();
+   _EGLDriver *drv;
+
+   if (!disp)
+      return EGL_TRUE;
+
+   /* a current display is always initialized */
+   drv = disp->Driver;
+
+   return drv->API.WaitClient(drv, disp);
 }
 
+
 #endif /* EGL_VERSION_1_2 */