void
GL::EnableStencilTest(BinaryStencilTest aTest,
GLint aComparand, GLuint aTestMask,
StencilOperation aOp, GLuint aWriteMask)
{
MOZ_ASSERT(IsCurrent());
if (!mStencilTestEnabled) {
Enable(GL_STENCIL_TEST);
mStencilTestEnabled = true;
}
if (mStencilTest != aTest || mStencilComparand != aComparand
|| mStencilTestMask != aTestMask) {
GLenum func;
switch (aTest) {
default:
MOZ_ASSERT(!"Invalid stencil test");
case ALWAYS_PASS:
func = GL_ALWAYS;
break;
case PASS_IF_EQUAL:
func = GL_EQUAL;
break;
case PASS_IF_NOT_EQUAL:
func = GL_NOTEQUAL;
break;
}
StencilFunc(func, aComparand, aTestMask);
mStencilTest = aTest;
mStencilComparand = aComparand;
mStencilTestMask = aTestMask;
}
if (mStencilOp != aOp) {
switch (aOp) {
case LEAVE_UNCHANGED:
StencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
break;
case CLEAR_PASSING_VALUES:
StencilOp(GL_KEEP, GL_ZERO, GL_ZERO);
break;
case REPLACE_PASSING_WITH_COMPARAND:
StencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
break;
case REPLACE_PASSING_CLEAR_FAILING:
StencilOp(GL_ZERO, GL_REPLACE, GL_REPLACE);
break;
}
mStencilOp = aOp;
}
if (mStencilWriteMask != aWriteMask) {
StencilMask(aWriteMask);
mStencilWriteMask = aWriteMask;
}
}
static
oglplus::context::StencilFuncArgs StencilFuncArgs(bool backface = false)
{
return oglplus::context::StencilFuncArgs(
StencilFunc(backface),
StencilRef(backface),
StencilValueMask(backface)
);
}
static CompareFunction StencilFunc(Face face)
{
return StencilFunc(face == Face::Back);
}
static void StencilFunc(const StencilFuncArgs& fa)
{
return StencilFunc(fa.Func(), fa.Ref(), fa.ValueMask());
}
