From 795f4c4b0133c1a8429235b3b610f5120878cd06 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Fri, 1 Aug 2008 17:28:41 +0000
Subject: [PATCH] support ScissorAttrib

---
 panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx | 24 +++++++++++++++++++
 panda/src/dxgsg9/dxGraphicsStateGuardian9.h   |  1 +
 2 files changed, 25 insertions(+)

diff --git a/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx b/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
index 78e098411c..2e850675ed 100755
--- a/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
+++ b/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
@@ -893,6 +893,7 @@ prepare_display_region(DisplayRegionPipelineReader *dr,
       << "GetViewport(" << vp_old.X << ", " << vp_old.Y << ", " << vp_old.Width << ", "
       << vp_old.Height << ") returned: Trying to set that vp---->\n";
     hr = _d3d_device->SetViewport(&vp_old);
+    set_render_state(D3DRS_SCISSORTESTENABLE, FALSE);
 
     if (FAILED(hr)) {
       dxgsg9_cat.error() << "Failed again\n";
@@ -3621,6 +3622,11 @@ set_state_and_transform(const RenderState *target,
     _state._stencil = _target._stencil;
   }
 
+  if (_target._scissor != _state._scissor) {
+    do_issue_scissor();
+    _state._scissor = _target._scissor;
+  }
+
   _state_rs = _target_rs;
 }
 
@@ -5649,6 +5655,24 @@ do_issue_stencil() {
   }
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: dxGraphicsStateGuardian9::do_issue_scissor
+//       Access: Protected
+//  Description: 
+////////////////////////////////////////////////////////////////////
+void DXGraphicsStateGuardian9::
+do_issue_scissor() {
+  const LVecBase4f &frame = _target._scissor->get_frame();
+
+  RECT r;
+  r.left = _current_viewport.X + _current_viewport.Width * frame[0];
+  r.top = _current_viewport.Y + _current_viewport.Height * (1.0f - frame[3]);
+  r.right = _current_viewport.X + _current_viewport.Width * frame[1];
+  r.bottom = _current_viewport.Y + _current_viewport.Height * (1.0f - frame[2]);
+  _d3d_device->SetScissorRect(&r);
+  set_render_state(D3DRS_SCISSORTESTENABLE, TRUE);
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: dxGraphicsStateGuardian9::calc_fb_properties
 //       Access: Public
diff --git a/panda/src/dxgsg9/dxGraphicsStateGuardian9.h b/panda/src/dxgsg9/dxGraphicsStateGuardian9.h
index c4d6a73972..8df910fada 100755
--- a/panda/src/dxgsg9/dxGraphicsStateGuardian9.h
+++ b/panda/src/dxgsg9/dxGraphicsStateGuardian9.h
@@ -187,6 +187,7 @@ protected:
   void do_issue_texture();
   void do_issue_blending();
   void do_issue_stencil();
+  void do_issue_scissor();
 
   virtual void enable_lighting(bool enable);
   virtual void set_ambient_light(const Colorf &color);