glsl: add support for shader stencil export
This adds proper support for the GL_ARB_shader_stencil_export extension
to the GLSL compiler. Thanks to Ian for pointing out where I need to add things.
diff --git a/src/glsl/ir_variable.cpp b/src/glsl/ir_variable.cpp
index ddc3bb0..f2c900f 100644
--- a/src/glsl/ir_variable.cpp
+++ b/src/glsl/ir_variable.cpp
@@ -422,6 +422,20 @@
}
}
+static void
+generate_ARB_shader_stencil_export_variables(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state,
+ bool warn)
+{
+ /* gl_FragStencilRefARB is only available in the fragment shader.
+ */
+ ir_variable *const fd =
+ add_variable("gl_FragStencilRefARB", ir_var_out, FRAG_RESULT_STENCIL,
+ glsl_type::int_type, instructions, state->symbols);
+
+ if (warn)
+ fd->warn_extension = "GL_ARB_shader_stencil_export";
+}
static void
generate_120_fs_variables(exec_list *instructions,
@@ -471,6 +485,10 @@
generate_130_fs_variables(instructions, state);
break;
}
+
+ if (state->ARB_shader_stencil_export_enable)
+ generate_ARB_shader_stencil_export_variables(instructions, state,
+ state->ARB_shader_stencil_export_warn);
}
void