void disable_mask()
{
assert(m_mask_level > 0);
if (--m_mask_level == 0)
{
glDisable(GL_STENCIL_TEST);
return;
}
// begin submit previous mask
glColorMask(0, 0, 0, 0);
// we set the stencil buffer to 'm_mask_level'
// where the stencil buffer m_mask_level + 1
glStencilFunc(GL_EQUAL, m_mask_level + 1, 0xFF);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
// draw the quad to fill stencil buffer
glBegin(GL_QUADS);
glVertex2f(0, 0);
glVertex2f(m_display_width, 0);
glVertex2f(m_display_width, m_display_height);
glVertex2f(0, m_display_height);
glEnd();
end_submit_mask();
}
void disable_mask()
{
assert(m_mask_level > 0);
if (--m_mask_level == 0)
{
glDisable(GL_STENCIL_TEST);
return;
}
// begin submit previous mask
glColorMask(0, 0, 0, 0);
// we set the stencil buffer to 'm_mask_level'
// where the stencil buffer m_mask_level + 1
glStencilFunc(GL_EQUAL, m_mask_level + 1, 0xFF);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
// draw the quad to fill stencil buffer
// glBegin(GL_QUADS);
// glVertex2f(0, 0);
// glVertex2f(m_display_width, 0);
// glVertex2f(m_display_width, m_display_height);
// glVertex2f(0, m_display_height);
// glEnd();
Sint16 squareVertices[8];
squareVertices[0] = 0;
squareVertices[1] = 0;
squareVertices[2] = m_display_width;
squareVertices[3] = 0;
squareVertices[4] = 0;
squareVertices[5] = m_display_height;
squareVertices[6] = m_display_width;
squareVertices[7] = m_display_height;
glVertexPointer(2, GL_SHORT, 0, squareVertices);
glEnableClientState(GL_VERTEX_ARRAY);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
end_submit_mask();
}
