---
src/mesa/main/bufferobj.c | 19 +++++++++++++++++++
src/mesa/main/bufferobj.h | 4 ++++
2 files changed, 23 insertions(+)
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index f026fc3..617242b 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -1006,6 +1006,25 @@ _mesa_lookup_bufferobj_locked(struct gl_context *ctx,
GLuint buffer)
_mesa_HashLookupLocked(ctx->Shared->BufferObjects, buffer);
}
+/**
+ * A convenience function for direct state access functions that throws
+ * GL_INVALID_OPERATION if buffer is not the name of a buffer object in the
+ * hash table.
+ */
+struct gl_buffer_object *
+_mesa_lookup_bufferobj_err(struct gl_context *ctx, GLuint buffer,
+ const char *caller)
+{
+ struct gl_buffer_object *bufObj;
+
+ bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+ if (!bufObj)
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(non-generated buffer name %u)", caller, buffer);
+
+ return bufObj;
+}
+
void
_mesa_begin_bufferobj_lookups(struct gl_context *ctx)
diff --git a/src/mesa/main/bufferobj.h b/src/mesa/main/bufferobj.h
index fe294fc..8e53bfd 100644
--- a/src/mesa/main/bufferobj.h
+++ b/src/mesa/main/bufferobj.h
@@ -89,6 +89,10 @@ _mesa_lookup_bufferobj(struct gl_context *ctx, GLuint
buffer);
extern struct gl_buffer_object *
_mesa_lookup_bufferobj_locked(struct gl_context *ctx, GLuint buffer);
+extern struct gl_buffer_object *
+_mesa_lookup_bufferobj_err(struct gl_context *ctx, GLuint buffer,
+ const char *caller);
+
extern void
_mesa_begin_bufferobj_lookups(struct gl_context *ctx);
--
2.1.0
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