mesa: implement _mesa_GenVertexArrays() for GL_ARB_vertex_array_object

This also involves adding a gl_array_object::VBOonly field.  For the
ARB extension, all arrays in the object must reside in a VBO.  This flag
keeps track of that requirement.

src/mesa/main/arrayobj.c

@@ -485,14 +485,14 @@ _mesa_DeleteVertexArraysAPPLE(GLsizei n, const GLuint *ids)
 
 /**
  * Generate a set of unique array object IDs and store them in \c arrays.
- * 
+ * Helper for _mesa_GenVertexArrays[APPLE]() functions below.
  * \param n       Number of IDs to generate.
  * \param arrays  Array of \c n locations to store the IDs.
+ * \param vboOnly Will arrays have to reside in VBOs?
  */
-void GLAPIENTRY
-_mesa_GenVertexArraysAPPLE(GLsizei n, GLuint *arrays)
+static void 
+gen_vertex_arrays(GLcontext *ctx, GLsizei n, GLuint *arrays, GLboolean vboOnly)
 {
-   GET_CURRENT_CONTEXT(ctx);
    GLuint first;
    GLint i;
    ASSERT_OUTSIDE_BEGIN_END(ctx);
@@ -518,12 +518,37 @@ _mesa_GenVertexArraysAPPLE(GLsizei n, GLuint *arrays)
          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenVertexArraysAPPLE");
          return;
       }
+      obj->VBOonly = vboOnly;
       save_array_object(ctx, obj);
       arrays[i] = first + i;
    }
 }
 
 
+/**
+ * ARB version of glGenVertexArrays()
+ * All arrays will be required to live in VBOs.
+ */
+void GLAPIENTRY
+_mesa_GenVertexArrays(GLsizei n, GLuint *arrays)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   gen_vertex_arrays(ctx, n, arrays, GL_TRUE);
+}
+
+
+/**
+ * APPLE version of glGenVertexArraysAPPLE()
+ * Arrays may live in VBOs or ordinary memory.
+ */
+void GLAPIENTRY
+_mesa_GenVertexArraysAPPLE(GLsizei n, GLuint *arrays)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   gen_vertex_arrays(ctx, n, arrays, GL_FALSE);
+}
+
+
 /**
  * Determine if ID is the name of an array object.
  * 

src/mesa/main/arrayobj.h

@@ -74,6 +74,8 @@ void GLAPIENTRY _mesa_BindVertexArrayAPPLE( GLuint id );
 
 void GLAPIENTRY _mesa_DeleteVertexArraysAPPLE(GLsizei n, const GLuint *ids);
 
+void GLAPIENTRY _mesa_GenVertexArrays(GLsizei n, GLuint *arrays);
+
 void GLAPIENTRY _mesa_GenVertexArraysAPPLE(GLsizei n, GLuint *buffer);
 
 GLboolean GLAPIENTRY _mesa_IsVertexArrayAPPLE( GLuint id );

src/mesa/main/mtypes.h

@@ -1563,6 +1563,7 @@ struct gl_array_object
 
    GLint RefCount;
    _glthread_Mutex Mutex;
+   GLboolean VBOonly;  /**< require all arrays to live in VBOs? */
 
    /** Conventional vertex arrays */
    /*@{*/