Make position the first vertex output varying on DX9 again to work around an NVIDIA driver issue.

TRAC #22688 Signed-off-by: Geoff Lang Signed-off-by: Shannon Woods Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2055 736b8ea6-26fd-11df-bfd4-992fa37f6226

Make position the first vertex output varying on DX9 again to work around an NVIDIA driver issue.
ee8d3c82 · shannon.woods%transgaming.com@gtempaccount.com · ce4d25fc · ee8d3c82
Commit ee8d3c82 authored Apr 13, 2013 by shannon.woods%transgaming.com@gtempaccount.com
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Showing with 11 additions and 2 deletions

ProgramBinary.cpp src/libGLESv2/ProgramBinary.cpp +11 -2

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--- a/src/libGLESv2/ProgramBinary.cpp
+++ b/src/libGLESv2/ProgramBinary.cpp
@@ -1265,6 +1265,11 @@ bool ProgramBinary::linkVaryings(InfoLog &infoLog, int registers, const Varying 
                  "struct VS_OUTPUT\n"
                  "{\n";

+    if (shaderModel < 4)
+    {
+        vertexHLSL += "    float4 gl_Position : " + positionSemantic + ";\n";
+    }
+
    for (int r = 0; r < registers; r++)
    {
        int registerSize = packing[r][3] ? 4 : (packing[r][2] ? 3 : (packing[r][1] ? 2 : 1));
@@ -1282,8 +1287,12 @@ bool ProgramBinary::linkVaryings(InfoLog &infoLog, int registers, const Varying 
        vertexHLSL += "    float gl_PointSize : PSIZE;\n";
    }

-    vertexHLSL += "    float4 gl_Position : " + positionSemantic + ";\n"
-                  "};\n"
+    if (shaderModel >= 4)
+    {
+        vertexHLSL += "    float4 gl_Position : " + positionSemantic + ";\n";
+    }
+
+    vertexHLSL += "};\n"
                  "\n"
                  "VS_OUTPUT main(VS_INPUT input)\n"
                  "{\n";