Mesa (master): egl: Extend per-thread info for multiple current contexts.

[Brian Paul]

Module: Mesa
Branch: master
Commit: 21b635ffa8b59049a95d50d4c7b7a8ff6413b730
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=21b635ffa8b59049a95d50d4c7b7a8ff6413b730

Author: Chia-I Wu <olvaffe at gmail.com>
Date:   Fri Jul 17 11:42:04 2009 -0600

egl: Extend per-thread info for multiple current contexts.

EGL allows multiple current contexts, as long as they are bound to
different client APIs.

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

---

 src/egl/main/eglapi.c     |   11 +++++++----
 src/egl/main/eglcontext.c |   40 ++++++++++++++++++++++++++++++++++------
 2 files changed, 41 insertions(+), 10 deletions(-)

diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index 8f4a489..332b98a 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -550,11 +550,14 @@ eglBindAPI(EGLenum api)
    if (_eglIsCurrentThreadDummy())
       return _eglError(EGL_BAD_ALLOC, "eglBindAPI");
 
+   if (!_eglIsApiValid(api))
+      return _eglError(EGL_BAD_PARAMETER, "eglBindAPI");
+
    switch (api) {
 #ifdef EGL_VERSION_1_4
    case EGL_OPENGL_API:
       if (_eglGlobal.ClientAPIsMask & EGL_OPENGL_BIT) {
-         t->CurrentAPI = api;
+         t->CurrentAPIIndex = _eglConvertApiToIndex(api);
          return EGL_TRUE;
       }
       _eglError(EGL_BAD_PARAMETER, "eglBindAPI");
@@ -562,14 +565,14 @@ eglBindAPI(EGLenum api)
 #endif
    case EGL_OPENGL_ES_API:
       if (_eglGlobal.ClientAPIsMask & (EGL_OPENGL_ES_BIT | EGL_OPENGL_ES2_BIT)) {
-         t->CurrentAPI = api;
+         t->CurrentAPIIndex = _eglConvertApiToIndex(api);
          return EGL_TRUE;
       }
       _eglError(EGL_BAD_PARAMETER, "eglBindAPI");
       return EGL_FALSE;
    case EGL_OPENVG_API:
       if (_eglGlobal.ClientAPIsMask & EGL_OPENVG_BIT) {
-         t->CurrentAPI = api;
+         t->CurrentAPIIndex = _eglConvertApiToIndex(api);
          return EGL_TRUE;
       }
       _eglError(EGL_BAD_PARAMETER, "eglBindAPI");
@@ -589,7 +592,7 @@ eglQueryAPI(void)
 {
    /* returns one of EGL_OPENGL_API, EGL_OPENGL_ES_API or EGL_OPENVG_API */
    _EGLThreadInfo *t = _eglGetCurrentThread();
-   return t->CurrentAPI;
+   return _eglConvertApiFromIndex(t->CurrentAPIIndex);
 }
 
 
diff --git a/src/egl/main/eglcontext.c b/src/egl/main/eglcontext.c
index 5e24b02..81e69e9 100644
--- a/src/egl/main/eglcontext.c
+++ b/src/egl/main/eglcontext.c
@@ -203,10 +203,10 @@ _eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d,
    _EGLContext *ctx = _eglLookupContext(context);
    _EGLSurface *draw = _eglLookupSurface(d);
    _EGLSurface *read = _eglLookupSurface(r);
-
-   _EGLContext *oldContext = _eglGetCurrentContext();
-   _EGLSurface *oldDrawSurface = _eglGetCurrentSurface(EGL_DRAW);
-   _EGLSurface *oldReadSurface = _eglGetCurrentSurface(EGL_READ);
+   _EGLContext *oldContext = NULL;
+   _EGLSurface *oldDrawSurface = NULL;
+   _EGLSurface *oldReadSurface = NULL;
+   EGLint apiIndex;
 
    if (_eglIsCurrentThreadDummy())
       return _eglError(EGL_BAD_ALLOC, "eglMakeCurrent");
@@ -225,6 +225,32 @@ _eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d,
          _eglError(EGL_BAD_MATCH, "eglMakeCurrent");
          return EGL_FALSE;
       }
+
+#ifdef EGL_VERSION_1_4
+      /* OpenGL and OpenGL ES are conflicting */
+      switch (ctx->ClientAPI) {
+      case EGL_OPENGL_ES_API:
+         if (t->CurrentContexts[_eglConvertApiToIndex(EGL_OPENGL_API)])
+            return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
+         break;
+      case EGL_OPENGL_API:
+         if (t->CurrentContexts[_eglConvertApiToIndex(EGL_OPENGL_ES_API)])
+            return _eglError(EGL_BAD_ACCESS, "eglMakeCurrent");
+         break;
+      default:
+         break;
+      }
+#endif
+      apiIndex = _eglConvertApiToIndex(ctx->ClientAPI);
+   }
+   else {
+      apiIndex = t->CurrentAPIIndex;
+   }
+
+   oldContext = t->CurrentContexts[apiIndex];
+   if (oldContext) {
+      oldDrawSurface = oldContext->DrawSurface;
+      oldReadSurface = oldContext->ReadSurface;
    }
 
    /*
@@ -275,9 +301,11 @@ _eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d,
       ctx->IsBound = EGL_TRUE;
       draw->IsBound = EGL_TRUE;
       read->IsBound = EGL_TRUE;
+      t->CurrentContexts[apiIndex] = ctx;
+   }
+   else {
+      t->CurrentContexts[apiIndex] = NULL;
    }
-
-   t->CurrentContext = ctx;
 
    return EGL_TRUE;
 }