6 files changed, 35 insertions, 11 deletions

diff --git a/mesalib/src/mesa/main/bufferobj.c b/mesalib/src/mesa/main/bufferobj.c
index b6879ceb5..0ee88560f 100644
--- a/mesalib/src/mesa/main/bufferobj.c
+++ b/mesalib/src/mesa/main/bufferobj.c
@@ -389,14 +389,14 @@ convert_clear_buffer_data(struct gl_context *ctx,
  * Default callback for the \c dd_function_table::NewBufferObject() hook.
  */
 static struct gl_buffer_object *
-_mesa_new_buffer_object( struct gl_context *ctx, GLuint name, GLenum target )
+_mesa_new_buffer_object(struct gl_context *ctx, GLuint name)
 {
    struct gl_buffer_object *obj;
 
    (void) ctx;
 
    obj = MALLOC_STRUCT(gl_buffer_object);
-   _mesa_initialize_buffer_object(ctx, obj, name, target);
+   _mesa_initialize_buffer_object(ctx, obj, name);
    return obj;
 }
 
@@ -494,12 +494,10 @@ _mesa_reference_buffer_object_(struct gl_context *ctx,
  * Initialize a buffer object to default values.
  */
 void
-_mesa_initialize_buffer_object( struct gl_context *ctx,
-				struct gl_buffer_object *obj,
-				GLuint name, GLenum target )
+_mesa_initialize_buffer_object(struct gl_context *ctx,
+                               struct gl_buffer_object *obj,
+                               GLuint name)
 {
-   (void) target;
-
    memset(obj, 0, sizeof(struct gl_buffer_object));
    mtx_init(&obj->Mutex, mtx_plain);
    obj->RefCount = 1;
@@ -906,7 +904,7 @@ _mesa_handle_bind_buffer_gen(struct gl_context *ctx,
        * never used before, allocate a buffer object now.
        */
       ASSERT(ctx->Driver.NewBufferObject);
-      buf = ctx->Driver.NewBufferObject(ctx, buffer, target);
+      buf = ctx->Driver.NewBufferObject(ctx, buffer);
       if (!buf) {
 	 _mesa_error(ctx, GL_OUT_OF_MEMORY, "%s", caller);
 	 return false;
@@ -2652,6 +2650,12 @@ set_ubo_binding(struct gl_context *ctx,
    binding->Offset = offset;
    binding->Size = size;
    binding->AutomaticSize = autoSize;
+
+   /* If this is a real buffer object, mark it has having been used
+    * at some point as a UBO.
+    */
+   if (size >= 0)
+      bufObj->UsageHistory |= USAGE_UNIFORM_BUFFER;
 }
 
 /**
@@ -2764,6 +2768,7 @@ set_atomic_buffer_binding(struct gl_context *ctx,
    } else {
       binding->Offset = offset;
       binding->Size = size;
+      bufObj->UsageHistory |= USAGE_ATOMIC_COUNTER_BUFFER;
    }
 }
 
diff --git a/mesalib/src/mesa/main/bufferobj.h b/mesalib/src/mesa/main/bufferobj.h
index 0779605c0..fe294fc0b 100644
--- a/mesalib/src/mesa/main/bufferobj.h
+++ b/mesalib/src/mesa/main/bufferobj.h
@@ -103,7 +103,7 @@ _mesa_multi_bind_lookup_bufferobj(struct gl_context *ctx,
 extern void
 _mesa_initialize_buffer_object(struct gl_context *ctx,
                                struct gl_buffer_object *obj,
-                               GLuint name, GLenum target);
+                               GLuint name);
 
 extern void
 _mesa_reference_buffer_object_(struct gl_context *ctx,
diff --git a/mesalib/src/mesa/main/dd.h b/mesalib/src/mesa/main/dd.h
index c130b14a5..c07e83ad9 100644
--- a/mesalib/src/mesa/main/dd.h
+++ b/mesalib/src/mesa/main/dd.h
@@ -602,7 +602,7 @@ struct dd_function_table {
     */
    /*@{*/
    struct gl_buffer_object * (*NewBufferObject)(struct gl_context *ctx,
-                                                GLuint buffer, GLenum target);
+                                                GLuint buffer);
    
    void (*DeleteBuffer)( struct gl_context *ctx, struct gl_buffer_object *obj );
 
diff --git a/mesalib/src/mesa/main/mtypes.h b/mesalib/src/mesa/main/mtypes.h
index 5e9453b2f..9f44edac6 100644
--- a/mesalib/src/mesa/main/mtypes.h
+++ b/mesalib/src/mesa/main/mtypes.h
@@ -1465,6 +1465,16 @@ struct gl_buffer_mapping {
 
 
 /**
+ * Usages we've seen for a buffer object.
+ */
+typedef enum {
+   USAGE_UNIFORM_BUFFER = 0x1,
+   USAGE_TEXTURE_BUFFER = 0x2,
+   USAGE_ATOMIC_COUNTER_BUFFER = 0x4,
+} gl_buffer_usage;
+
+
+/**
  * GL_ARB_vertex/pixel_buffer_object buffer object
  */
 struct gl_buffer_object
@@ -1481,6 +1491,7 @@ struct gl_buffer_object
    GLboolean Written;   /**< Ever written to? (for debugging) */
    GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */
    GLboolean Immutable; /**< GL_ARB_buffer_storage */
+   gl_buffer_usage UsageHistory; /**< How has this buffer been used so far? */
 
    struct gl_buffer_mapping Mappings[MAP_COUNT];
 };
@@ -4060,6 +4071,8 @@ struct gl_driver_flags
     */
    uint64_t NewUniformBuffer;
 
+   uint64_t NewTextureBuffer;
+
    /**
     * gl_context::AtomicBufferBindings
     */
diff --git a/mesalib/src/mesa/main/shared.c b/mesalib/src/mesa/main/shared.c
index 7ef932ff0..f74a8232f 100644
--- a/mesalib/src/mesa/main/shared.c
+++ b/mesalib/src/mesa/main/shared.c
@@ -86,7 +86,7 @@ _mesa_alloc_shared_state(struct gl_context *ctx)
    shared->SamplerObjects = _mesa_NewHashTable();
 
    /* Allocate the default buffer object */
-   shared->NullBufferObj = ctx->Driver.NewBufferObject(ctx, 0, 0);
+   shared->NullBufferObj = ctx->Driver.NewBufferObject(ctx, 0);
 
    /* Create default texture objects */
    for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
diff --git a/mesalib/src/mesa/main/teximage.c b/mesalib/src/mesa/main/teximage.c
index c0298af8e..4f4bb11dd 100644
--- a/mesalib/src/mesa/main/teximage.c
+++ b/mesalib/src/mesa/main/teximage.c
@@ -4652,6 +4652,12 @@ texbufferrange(struct gl_context *ctx, GLenum target, GLenum internalFormat,
       texObj->BufferSize = size;
    }
    _mesa_unlock_texture(ctx, texObj);
+
+   ctx->NewDriverState |= ctx->DriverFlags.NewTextureBuffer;
+
+   if (bufObj) {
+      bufObj->UsageHistory |= USAGE_TEXTURE_BUFFER;
+   }
 }