Return 0 for dFdx, dFdy and fwidth for discontinuous arguments.

TRAC #20737 Signed-off-by: Daniel Koch Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/trunk@1124 736b8ea6-26fd-11df-bfd4-992fa37f6226

Return 0 for dFdx, dFdy and fwidth for discontinuous arguments.
ddbb45d6 · daniel@transgaming.com · e11100ce · ddbb45d6 · ddbb45d6
Commit ddbb45d6 authored May 31, 2012 by daniel@transgaming.com
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Showing with 31 additions and 4 deletions

version.h src/common/version.h +1 -1

OutputHLSL.cpp src/compiler/OutputHLSL.cpp +30 -3

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--- a/src/common/version.h
+++ b/src/common/version.h
 #define MAJOR_VERSION 1
 #define MINOR_VERSION 0
 #define BUILD_VERSION 0
-#define BUILD_REVISION 1117
+#define BUILD_REVISION 1124
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)

--- a/src/compiler/OutputHLSL.cpp
+++ b/src/compiler/OutputHLSL.cpp
@@ -1215,9 +1215,36 @@ bool OutputHLSL::visitUnary(Visit visit, TIntermUnary *node)
      case EOpFract:            outputTriplet(visit, "frac(", "", ")");      break;
      case EOpLength:           outputTriplet(visit, "length(", "", ")");    break;
      case EOpNormalize:        outputTriplet(visit, "normalize(", "", ")"); break;
-      case EOpDFdx:             outputTriplet(visit, "ddx(", "", ")");       break;
+      case EOpDFdx:
-      case EOpDFdy:             outputTriplet(visit, "(-ddy(", "", "))");    break;
+        if(mInsideDiscontinuousLoop || mOutputLod0Function)
-      case EOpFwidth:           outputTriplet(visit, "fwidth(", "", ")");    break;        
+        {
+            outputTriplet(visit, "(", "", ", 0.0)");
+        }
+        else
+        {
+            outputTriplet(visit, "ddx(", "", ")");
+        }
+        break;
+      case EOpDFdy:
+        if(mInsideDiscontinuousLoop || mOutputLod0Function)
+        {
+            outputTriplet(visit, "(", "", ", 0.0)");
+        }
+        else
+        {
+           outputTriplet(visit, "(-ddy(", "", "))");
+        }
+        break;
+      case EOpFwidth:
+        if(mInsideDiscontinuousLoop || mOutputLod0Function)
+        {
+            outputTriplet(visit, "(", "", ", 0.0)");
+        }
+        else
+        {
+            outputTriplet(visit, "fwidth(", "", ")");
+        }
+        break;
      case EOpAny:              outputTriplet(visit, "any(", "", ")");       break;
      case EOpAll:              outputTriplet(visit, "all(", "", ")");       break;
      default: UNREACHABLE();