diff options
author | Juan A. Suarez Romero <[email protected]> | 2017-09-14 16:21:24 +0000 |
---|---|---|
committer | Juan A. Suarez Romero <[email protected]> | 2017-09-19 18:45:56 +0200 |
commit | c408c92d2868e44ac909dff94fb374d0d5f6be9a (patch) | |
tree | 2d3358d3972478b983044c68f7901620c6db586a | |
parent | 1746671a76f7310d397347ab7c5db0b01706b5c2 (diff) |
glsl: buffer variables can be readonly and writeonly
In GLSL ES 3.10 session 4.9 [Memory Access Qualifiers], it has the
following description:
"A variable could be qualified as both readonly and writeonly,
disallowing both read and write, but still be passed to
imageSize() to have the size queried.".
This is for image variable, but not for buffer variables.
According to https://github.com/KhronosGroup/OpenGL-API/issues/7 Khronos
intent is to allow both readonly and writeonly in buffer variables, and
as such it will update the GLSL specification.
This commit address this issue, and fixes:
KHR-GL{43,44,45}.shader_storage_buffer_object.basic-readonly-writeonly
KHR-GLES31.core.shader_storage_buffer_object.basic-readonly-writeonly
v2: set correctly fields[i] memory flags (Samuel Pitoiset).
Reviewed-by: Samuel Pitoiset <[email protected]>
-rw-r--r-- | src/compiler/glsl/ast_to_hir.cpp | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/src/compiler/glsl/ast_to_hir.cpp b/src/compiler/glsl/ast_to_hir.cpp index 45c8ca2a5d9..c46454956d7 100644 --- a/src/compiler/glsl/ast_to_hir.cpp +++ b/src/compiler/glsl/ast_to_hir.cpp @@ -7254,11 +7254,6 @@ ast_process_struct_or_iface_block_members(exec_list *instructions, validate_matrix_layout_for_type(state, &loc, decl_type, NULL); } - if (qual->flags.q.read_only && qual->flags.q.write_only) { - _mesa_glsl_error(&loc, state, "buffer variable can't be both " - "readonly and writeonly."); - } - foreach_list_typed (ast_declaration, decl, link, &decl_list->declarations) { YYLTYPE loc = decl->get_location(); @@ -7434,12 +7429,9 @@ ast_process_struct_or_iface_block_members(exec_list *instructions, /* For readonly and writeonly qualifiers the field definition, * if set, overwrites the layout qualifier. */ - if (qual->flags.q.read_only) { - fields[i].memory_read_only = true; - fields[i].memory_write_only = false; - } else if (qual->flags.q.write_only) { - fields[i].memory_read_only = false; - fields[i].memory_write_only = true; + if (qual->flags.q.read_only || qual->flags.q.write_only) { + fields[i].memory_read_only = qual->flags.q.read_only; + fields[i].memory_write_only = qual->flags.q.write_only; } else { fields[i].memory_read_only = layout ? layout->flags.q.read_only : 0; |