void
GL::EnableStencilTest(UnaryStencilTest aTest, GLuint aTestMask,
StencilOperation aOp, GLuint aWriteMask)
{
switch (aTest) {
case PASS_IF_NOT_ZERO:
EnableStencilTest(PASS_IF_NOT_EQUAL, 0, aTestMask, aOp, aWriteMask);
return;
case PASS_IF_ALL_SET:
EnableStencilTest(PASS_IF_EQUAL, aTestMask, aTestMask, aOp, aWriteMask);
return;
}
}
bool nuiGLDrawContext::ResetClipShape(bool Invert)
{
EnableStencilTest(true);
//glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE);
glStencilMask(~0);
mClipShapeValue = 1;
glClearStencil(Invert?mClipShapeValue:0);
glClear(GL_STENCIL_BUFFER_BIT);
EnableStencilTest(false);
//glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE);
glStencilMask(0);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
glStencilFunc(GL_EQUAL, mClipShapeValue, 255);
return true;
}
bool nuiGLDrawContext::AddClipShape(nuiShape& rShape, bool Invert)
{
EnableStencilTest(true);
glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE);
glStencilMask(~0);
// Now draw the shape in the stencil buffer:
GLenum value = Invert? 0: mClipShapeValue;
glStencilFunc(GL_ALWAYS, value, 255);
glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
DrawShape(&rShape, eFillShape);
// Now lets get back to the mode we were in before the stencill fun:
glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE);
glStencilMask(0);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
glStencilFunc(GL_EQUAL, mClipShapeValue, 255);
return true;
}