bool
Stencil2Test::isApplicable() const
{
return (have_ATI_separate_stencil() ||
have_EXT_stencil_two_side() ||
have_EXT_stencil_two_side());
}
void
Stencil2Test::runOne(Stencil2Result &r, Window &w)
{
(void) w; // silence warning
r.pass = true;
get_ext_functions();
// how many stencil bits (we assume at least 8 above)
glGetIntegerv(GL_STENCIL_BITS, &stencilBits);
stencilMax = (1 << stencilBits) - 1;
assert(stencilBits >= 8);
glViewport(0, 0, windowSize, windowSize);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, windowSize, 0, windowSize, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
if (have_ATI_separate_stencil()) {
r.pass &= test_stencil(ATI);
}
if (have_EXT_stencil_two_side()) {
r.pass &= test_stencil(EXT);
}
if (have_GL2_stencil_two_side()) {
r.pass &= test_stencil(GL2);
}
}
void enable_shadow_stencil() {
assert(have_EXT_stencil_wrap());
if (have_EXT_stencil_two_side()) {
glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT);
glActiveStencilFaceEXT(GL_BACK);
glStencilFunc(GL_ALWAYS, 1, ~0U);
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP);
glActiveStencilFaceEXT(GL_FRONT);
glStencilFunc(GL_ALWAYS, 1, ~0U);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP);
} else if (have_ATI_separate_stencil()) {
glStencilFuncSeparateATI( GL_ALWAYS, GL_ALWAYS, 1, ~0U );
glStencilOpSeparateATI( GL_BACK, GL_KEEP, GL_KEEP, GL_INCR_WRAP );
glStencilOpSeparateATI( GL_FRONT, GL_KEEP, GL_KEEP, GL_DECR_WRAP );
} else {
assert(0);
}
}