+ /* If there is an indirect buffer, map it and extract the draw params */
+ if (indirect && prims[0].is_indirect) {
+ struct _mesa_prim new_prim = *prims;
+ struct _mesa_index_buffer new_ib = *ib;
+ const uint32_t *indirect_params;
+ if (!ctx->Driver.MapBufferRange(ctx, 0, indirect->Size, GL_MAP_READ_BIT,
+ indirect, MAP_INTERNAL)) {
+
+ /* something went wrong with mapping, give up */
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "failed to map indirect buffer for sw primitive restart");
+ return;
+ }
+
+ assert(nr_prims == 1);
+ indirect_params = (const uint32_t *)
+ ADD_POINTERS(indirect->Mappings[MAP_INTERNAL].Pointer,
+ new_prim.indirect_offset);
+
+ new_prim.is_indirect = 0;
+ new_prim.count = indirect_params[0];
+ new_prim.num_instances = indirect_params[1];
+ new_prim.start = indirect_params[2];
+ new_prim.basevertex = indirect_params[3];
+ new_prim.base_instance = indirect_params[4];
+
+ new_ib.count = new_prim.count;
+
+ prims = &new_prim;
+ ib = &new_ib;
+
+ ctx->Driver.UnmapBuffer(ctx, indirect, MAP_INTERNAL);
+ }
+