From 8c361e84ad010552a42593fad4130befc58e9a6a Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Fri, 3 Jun 2016 11:25:19 +0200
Subject: [PATCH] Revert "egl: Check if API is supported when using
 eglBindAPI."

This reverts commit e8b38ca202fbe8c281aeb81a4b64256983f185e0.

It broke Glamor for Gallium at least.
---
 src/egl/main/eglapi.c     | 65 ---------------------------------------
 src/egl/main/eglcurrent.h | 11 ++++++-
 src/egl/main/egldisplay.c |  5 ---
 src/egl/main/egldisplay.h |  1 -
 4 files changed, 10 insertions(+), 72 deletions(-)

diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index 4ef0a2759b5..4700dbe42f6 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -1196,61 +1196,6 @@ eglGetError(void)
 }
 
 
-static bool
-_eglDisplaySupportsApi(_EGLDisplay *dpy, EGLenum api)
-{
-   if (!dpy->Initialized) {
-      return false;
-   }
-
-   switch (api) {
-   case EGL_OPENGL_API:
-      return !!(dpy->ClientAPIs & EGL_OPENGL_BIT);
-   case EGL_OPENGL_ES_API:
-      return dpy->ClientAPIs & EGL_OPENGL_ES_BIT ||
-             dpy->ClientAPIs & EGL_OPENGL_ES2_BIT ||
-             dpy->ClientAPIs & EGL_OPENGL_ES3_BIT_KHR;
-   case EGL_OPENVG_API:
-      return !!(dpy->ClientAPIs & EGL_OPENVG_BIT);
-   }
-
-   return false;
-}
-
-
-/**
- * Return true if a client API enum is recognized.
- */
-static bool
-_eglIsApiValid(EGLenum api)
-{
-   _EGLDisplay *dpy = _eglGlobal.DisplayList;
-   _EGLThreadInfo *current_thread = _eglGetCurrentThread();
-
-   if (api != EGL_OPENGL_API && api != EGL_OPENGL_ES_API &&
-       api != EGL_OPENVG_API) {
-      return false;
-   }
-
-   while (dpy) {
-      _EGLThreadInfo *thread = dpy->ThreadList;
-
-      while (thread) {
-         if (thread == current_thread) {
-            if (_eglDisplaySupportsApi(dpy, api))
-               return true;
-         }
-
-         thread = thread->Next;
-      }
-
-      dpy = dpy->Next;
-   }
-
-   return false;
-}
-
-
 /**
  ** EGL 1.2
  **/
@@ -1266,16 +1211,6 @@ _eglIsApiValid(EGLenum api)
  *  eglWaitNative()
  * See section 3.7 "Rendering Context" in the EGL specification for details.
  */
-
- /**
-  * Section 3.7 (Rendering Contexts) of the EGL 1.5 spec says:
-  *
-  * "api must specify one of the supported client APIs, either
-  * EGL_OPENGL_API, EGL_OPENGL_ES_API, or EGL_OPENVG_API... If api
-  * is not one of the values specified above, or if the client API
-  * specified by api is not supported by the implementation, an
-  * EGL_BAD_PARAMETER error is generated."
-  */
 EGLBoolean EGLAPIENTRY
 eglBindAPI(EGLenum api)
 {
diff --git a/src/egl/main/eglcurrent.h b/src/egl/main/eglcurrent.h
index 6c203be0729..1e386acdafb 100644
--- a/src/egl/main/eglcurrent.h
+++ b/src/egl/main/eglcurrent.h
@@ -56,7 +56,6 @@ extern "C" {
  */
 struct _egl_thread_info
 {
-   _EGLThreadInfo *Next; /* used to link threads */
    EGLint LastError;
    _EGLContext *CurrentContexts[_EGL_API_NUM_APIS];
    /* use index for fast access to current context */
@@ -64,6 +63,16 @@ struct _egl_thread_info
 };
 
 
+/**
+ * Return true if a client API enum is recognized.
+ */
+static inline EGLBoolean
+_eglIsApiValid(EGLenum api)
+{
+   return (api >= _EGL_API_FIRST_API && api <= _EGL_API_LAST_API);
+}
+
+
 /**
  * Convert a client API enum to an index, for use by thread info.
  * The client API enum is assumed to be valid.
diff --git a/src/egl/main/egldisplay.c b/src/egl/main/egldisplay.c
index 907a60747d0..f6db03ab50c 100644
--- a/src/egl/main/egldisplay.c
+++ b/src/egl/main/egldisplay.c
@@ -240,7 +240,6 @@ _EGLDisplay *
 _eglFindDisplay(_EGLPlatformType plat, void *plat_dpy)
 {
    _EGLDisplay *dpy;
-   _EGLThreadInfo *thread = _eglGetCurrentThread();
 
    if (plat == _EGL_INVALID_PLATFORM)
       return NULL;
@@ -266,13 +265,9 @@ _eglFindDisplay(_EGLPlatformType plat, void *plat_dpy)
          /* add to the display list */ 
          dpy->Next = _eglGlobal.DisplayList;
          _eglGlobal.DisplayList = dpy;
-         dpy->ThreadList = NULL;
       }
    }
 
-   thread->Next = dpy->ThreadList;
-   dpy->ThreadList = thread;
-
    mtx_unlock(_eglGlobal.Mutex);
 
    return dpy;
diff --git a/src/egl/main/egldisplay.h b/src/egl/main/egldisplay.h
index 8a730ed2d9c..6bfc8589a42 100644
--- a/src/egl/main/egldisplay.h
+++ b/src/egl/main/egldisplay.h
@@ -140,7 +140,6 @@ struct _egl_display
    _EGLPlatformType Platform; /**< The type of the platform display */
    void *PlatformDisplay;     /**< A pointer to the platform display */
 
-   _EGLThreadInfo *ThreadList;/**< A pointer to the thread the display was created form */
    _EGLDriver *Driver;        /**< Matched driver of the display */
    EGLBoolean Initialized;    /**< True if the display is initialized */
 
-- 
2.30.2