From e9ad9a719dc66437ddf021d13e6ca736a23b5413 Mon Sep 17 00:00:00 2001
From: Jason Sams <rjsams@android.com>
Date: Wed, 30 Sep 2009 17:36:20 -0700
Subject: Implement screen aligned bitmap drawing support.

---
 libs/rs/rsProgramVertex.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'libs/rs/rsProgramVertex.cpp')

diff --git a/libs/rs/rsProgramVertex.cpp b/libs/rs/rsProgramVertex.cpp
index 9bfa6022ae6e..eea8b3b67068 100644
--- a/libs/rs/rsProgramVertex.cpp
+++ b/libs/rs/rsProgramVertex.cpp
@@ -121,7 +121,14 @@ void ProgramVertex::setTextureMatrix(const rsc_Matrix *m) const
     mDirty = true;
 }
 
-
+void ProgramVertex::transformToScreen(const Context *rsc, float *v4out, const float *v3in) const
+{
+    float *f = static_cast<float *>(mConstants->getPtr());
+    Matrix mvp;
+    mvp.loadMultiply((Matrix *)&f[RS_PROGRAM_VERTEX_MODELVIEW_OFFSET],
+                     (Matrix *)&f[RS_PROGRAM_VERTEX_PROJECTION_OFFSET]);
+    mvp.vectorMultiply(v4out, v3in);
+}
 
 ProgramVertexState::ProgramVertexState()
 {
-- 
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