1 files changed, 7 insertions, 1 deletions
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 6d564b25274..e2519780ab2 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -248,10 +248,16 @@ struct dd_function_table {
 
    /**
     * Called by glCopyTex[Sub]Image[123]D().
+    *
+    * This function should copy a rectangular region in the rb to a single
+    * destination slice, specified by @slice.  In the case of 1D array
+    * textures (where one GL call can potentially affect multiple destination
+    * slices), core mesa takes care of calling this function multiple times,
+    * once for each scanline to be copied.
     */
    void (*CopyTexSubImage)(struct gl_context *ctx, GLuint dims,
                            struct gl_texture_image *texImage,
-                           GLint xoffset, GLint yoffset, GLint zoffset,
+                           GLint xoffset, GLint yoffset, GLint slice,
                            struct gl_renderbuffer *rb,
                            GLint x, GLint y,
                            GLsizei width, GLsizei height);