glsl: Track the linearized array index for each UBO instance array element

v2: Set linearizer_array_index in process_block_array_leaf.  Suggested
by Timothy.

Signed-off-by: Ian Romanick <[email protected]>
Cc: [email protected]
Reviewed-by: Timothy Arceri <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 36d48e2115d..ac4cac0e498 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2493,6 +2493,21 @@ struct gl_uniform_block
    uint8_t stageref;
 
    /**
+    * Linearized array index for uniform block instance arrays
+    *
+    * Given a uniform block instance array declared with size
+    * blk[s_0][s_1]..[s_m], the block referenced by blk[i_0][i_1]..[i_m] will
+    * have the linearized array index
+    *
+    *           m-1       m
+    *     i_m + ∑   i_j * ∏     s_k
+    *           j=0       k=j+1
+    *
+    * For a uniform block instance that is not an array, this is always 0.
+    */
+   uint8_t linearized_array_index;
+
+   /**
     * Layout specified in the shader
     *
     * This isn't accessible through the API, but it is used while