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glsl: Make vertex ID lowering declare gl_BaseVertex as hidden.

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If the GL_ARB_shader_draw_parameters extension is enabled, we'll already
have a gl_BaseVertex variable.  It will have var->how_declared set to
ir_var_declared_implicitly, and will appear in the program resource
list.

If not, we make one for internal use.  We don't want it to be listed
in the program resource list, as the application won't be expecting
it.  Marking it hidden will properly exclude it.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Kenneth Graunke 2016-04-01 20:52:33 -07:00
parent 33df1c2935
commit 2c5afe1fa9
1 changed files with 1 additions and 1 deletions
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2
src/compiler/glsl/lower_vertex_id.cpp
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@ -100,7 +100,7 @@ lower_vertex_id_visitor::visit(ir_dereference_variable *ir)
if (gl_BaseVertex == NULL) {
gl_BaseVertex = new(mem_ctx) ir_variable(int_t, "gl_BaseVertex",
ir_var_system_value);
gl_BaseVertex->data.how_declared = ir_var_declared_implicitly;
gl_BaseVertex->data.how_declared = ir_var_hidden;
gl_BaseVertex->data.read_only = true;
gl_BaseVertex->data.location = SYSTEM_VALUE_BASE_VERTEX;
gl_BaseVertex->data.explicit_location = true;