From d5787e7eef7c42e4a90cbd89dee81efbf1491487 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Tue, 16 Jun 2015 02:43:55 +0200 Subject: [PATCH] glsl: allow indexing of gl_out with a non-const if length isn't known Reviewed-by: Kenneth Graunke --- src/glsl/ast_array_index.cpp | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/glsl/ast_array_index.cpp b/src/glsl/ast_array_index.cpp index 50971bb22bb..27e84d101ec 100644 --- a/src/glsl/ast_array_index.cpp +++ b/src/glsl/ast_array_index.cpp @@ -216,6 +216,16 @@ _mesa_ast_array_index_to_hir(void *mem_ctx, if (v != NULL) v->data.max_array_access = implicit_size - 1; } + else if (state->stage == MESA_SHADER_TESS_CTRL && + array->variable_referenced()->data.mode == ir_var_shader_out && + !array->variable_referenced()->data.patch) { + /* Tessellation control shader output non-patch arrays are + * initially unsized. Despite that, they are allowed to be + * indexed with a non-constant expression (typically + * "gl_InvocationID"). The array size will be determined + * by the linker. + */ + } else { _mesa_glsl_error(&loc, state, "unsized array index must be constant"); }