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glsl/tests: Verify fragment shader built-ins generated by _mesa_glsl_initialize_variables

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Checks that the variables generated meet certain criteria.

 - Fragment shader inputs have an explicit location.

 - Fragment shader outputs have an explicit location.

 - Vertex / geometry shader-only varying locations are not used.

 - Fragment shader uniforms and system values don't have an explicit
   location.

 - Fragment shader constants don't have an explicit location and are
   read-only.

 - No other kinds of fragment variables exist.

It does not verify that an specific variables exist.

v2: Use _mesa_varying_slot_in_fs in
fragment_builtin.inputs_have_explicit_location.  Suggested by Paul.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
This commit is contained in:
Ian Romanick 2013-10-03 15:14:35 -07:00
parent d05202900b
commit f094a0f825
1 changed files with 71 additions and 0 deletions
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71
src/glsl/tests/builtin_variable_test.cpp
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@ -222,3 +222,74 @@ TEST_F(vertex_builtin, no_invalid_variable_modes)
{
common_builtin::no_invalid_variable_modes();
}
/********************************************************************/
class fragment_builtin : public common_builtin {
public:
fragment_builtin()
: common_builtin(GL_FRAGMENT_SHADER)
{
/* empty */
}
};
TEST_F(fragment_builtin, names_start_with_gl)
{
common_builtin::names_start_with_gl();
}
TEST_F(fragment_builtin, inputs_have_explicit_location)
{
foreach_list(node, &this->ir) {
ir_variable *const var = ((ir_instruction *) node)->as_variable();
if (var->mode != ir_var_shader_in)
continue;
EXPECT_TRUE(var->explicit_location);
EXPECT_NE(-1, var->location);
EXPECT_GT(VARYING_SLOT_VAR0, var->location);
EXPECT_EQ(0u, var->location_frac);
/* Several varyings only exist in the vertex / geometry shader. Be sure
* that no inputs with these locations exist.
*/
EXPECT_TRUE(_mesa_varying_slot_in_fs((gl_varying_slot) var->location));
}
}
TEST_F(fragment_builtin, outputs_have_explicit_location)
{
foreach_list(node, &this->ir) {
ir_variable *const var = ((ir_instruction *) node)->as_variable();
if (var->mode != ir_var_shader_out)
continue;
EXPECT_TRUE(var->explicit_location);
EXPECT_NE(-1, var->location);
/* gl_FragData[] has location FRAG_RESULT_DATA0. Locations beyond that
* are invalid.
*/
EXPECT_GE(FRAG_RESULT_DATA0, var->location);
EXPECT_EQ(0u, var->location_frac);
}
}
TEST_F(fragment_builtin, uniforms_and_system_values_dont_have_explicit_location)
{
common_builtin::uniforms_and_system_values_dont_have_explicit_location();
}
TEST_F(fragment_builtin, constants_are_constant)
{
common_builtin::constants_are_constant();
}
TEST_F(fragment_builtin, no_invalid_variable_modes)
{
common_builtin::no_invalid_variable_modes();
}