diff options
| author | Kalyan Kondapally <kalyan.kondapally@intel.com> | 2014-09-08 11:10:42 +0300 |
|---|---|---|
| committer | Tapani Pälli <tapani.palli@intel.com> | 2014-09-09 10:39:39 +0300 |
| commit | 78c9201a5b57ed635b7161fd638cf6814e103e1b (patch) | |
| tree | a778199a667f4177e61fa7ebba574713a36912b3 /src/glsl/linker.cpp | |
| parent | 2a49a940799fdf538dbf86cb04a8335f7d5a829e (diff) | |
Linking fails when not writing gl_Position.
According to GLSL-ES Spec(i.e. 1.0, 3.0), gl_Position value is undefined
after the vertex processing stage if we don't write gl_Position. However,
GLSL 1.10 Spec mentions that writing to gl_Position is mandatory. In case
of GLSL-ES, it's not an error and atleast the linking should pass.
Currently, Mesa throws an linker error in case we dont write to gl_position
and Version is less then 140(GLSL) and 300(GLSL-ES). This patch changes
it so that we don't report an error in case of GLSL-ES.
Signed-off-by: Kalyan Kondapally <kalyan.kondapally@intel.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83380
Diffstat (limited to 'src/glsl/linker.cpp')
| -rw-r--r-- | src/glsl/linker.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp index 57be4931d78..e9cf5503a27 100644 --- a/src/glsl/linker.cpp +++ b/src/glsl/linker.cpp @@ -559,10 +559,10 @@ validate_vertex_shader_executable(struct gl_shader_program *prog, * vertex processing has occurred. Its value is undefined if * the vertex shader executable does not write gl_Position." * - * GLSL ES 3.00 is similar to GLSL 1.40--failing to write to gl_Position is - * not an error. + * All GLSL ES Versions are similar to GLSL 1.40--failing to write to + * gl_Position is not an error. */ - if (prog->Version < (prog->IsES ? 300 : 140)) { + if (!prog->IsES && prog->Version < 140) { find_assignment_visitor find("gl_Position"); find.run(shader->ir); if (!find.variable_found()) { |