2 files changed, 22 insertions, 19 deletions
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index cee11a39120..b95dfb9f7b7 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1657,6 +1657,20 @@ typedef enum {
    DRAW_ARRAYS
 } gl_draw_method;
 
+/**
+ * Enum for the OpenGL APIs we know about and may support.
+ *
+ * NOTE: This must match the api_enum table in
+ * src/mesa/main/get_hash_generator.py
+ */
+typedef enum
+{
+   API_OPENGL_COMPAT,      /* legacy / compatibility contexts */
+   API_OPENGLES,
+   API_OPENGLES2,
+   API_OPENGL_CORE,
+   API_OPENGL_LAST = API_OPENGL_CORE
+} gl_api;
 
 /**
  * Vertex array state
@@ -1701,8 +1715,9 @@ struct gl_array_attrib
    /** One of the DRAW_xxx flags, not consumed by drivers */
    gl_draw_method DrawMethod;
 
-   /** Legal array datatypes */
+   /** Legal array datatypes and the API for which they have been computed */
    GLbitfield LegalTypesMask;
+   gl_api LegalTypesMaskAPI;
 };
 
 
@@ -4040,21 +4055,6 @@ enum mesa_debug_severity {
 /** @} */
 
 /**
- * Enum for the OpenGL APIs we know about and may support.
- *
- * NOTE: This must match the api_enum table in
- * src/mesa/main/get_hash_generator.py
- */
-typedef enum
-{
-   API_OPENGL_COMPAT,      /* legacy / compatibility contexts */
-   API_OPENGLES,
-   API_OPENGLES2,
-   API_OPENGL_CORE,
-   API_OPENGL_LAST = API_OPENGL_CORE
-} gl_api;
-
-/**
  * Driver-specific state flags.
  *
  * These are or'd with gl_context::NewDriverState to notify a driver about
diff --git a/src/mesa/main/varray.c b/src/mesa/main/varray.c
index 96c2b26f7a9..89aaad1aabd 100644
--- a/src/mesa/main/varray.c
+++ b/src/mesa/main/varray.c
@@ -258,11 +258,14 @@ update_array_format(struct gl_context *ctx,
    GLuint elementSize;
    GLenum format = GL_RGBA;
 
-   if (ctx->Array.LegalTypesMask == 0) {
-      /* One-time initialization.  We can't do this in _mesa_init_varrays()
-       * below because extensions are not yet enabled at that point.
+   if (ctx->Array.LegalTypesMask == 0 || ctx->Array.LegalTypesMaskAPI != ctx->API) {
+      /* Compute the LegalTypesMask only once, unless the context API has
+       * changed, in which case we want to compute it again.  We can't do this
+       * in _mesa_init_varrays() below because extensions are not yet enabled
+       * at that point.
        */
       ctx->Array.LegalTypesMask = get_legal_types_mask(ctx);
+      ctx->Array.LegalTypesMaskAPI = ctx->API;
    }
 
    legalTypesMask &= ctx->Array.LegalTypesMask;