Disable GL_OES_standard_derivatives when ps_2_x or later is not available.

src/common/version.h

 #define MAJOR_VERSION 1
 #define MINOR_VERSION 0
 #define BUILD_VERSION 0
-#define BUILD_REVISION 1639
+#define BUILD_REVISION 1641
 
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)

src/libGLESv2/Context.cpp

@@ -317,7 +317,7 @@ void Context::makeCurrent(egl::Display *display, egl::Surface *surface)
         mSupportsLuminanceAlphaTextures = mDisplay->getLuminanceAlphaTextureSupport();
         mSupportsDepthTextures = mDisplay->getDepthTextureSupport();
         mSupportsTextureFilterAnisotropy = mMaxTextureAnisotropy >= 2.0f;
-
+        mSupportsDerivativeInstructions = (mDeviceCaps.PS20Caps.Caps & D3DPS20CAPS_GRADIENTINSTRUCTIONS) != 0;
         mSupports32bitIndices = mDeviceCaps.MaxVertexIndex >= (1 << 16);
 
         mNumCompressedTextureFormats = 0;
@@ -3621,6 +3621,11 @@ bool Context::supportsTextureFilterAnisotropy() const
     return mSupportsTextureFilterAnisotropy;
 }
 
+bool Context::supportsDerivativeInstructions() const
+{
+    return mSupportsDerivativeInstructions;
+}
+
 float Context::getTextureMaxAnisotropy() const
 {
     return mMaxTextureAnisotropy;
@@ -3883,7 +3888,10 @@ void Context::initExtensionString()
     mExtensionString += "GL_OES_packed_depth_stencil ";
     mExtensionString += "GL_OES_get_program_binary ";
     mExtensionString += "GL_OES_rgb8_rgba8 ";
-    mExtensionString += "GL_OES_standard_derivatives ";
+    if (supportsDerivativeInstructions())
+    {
+        mExtensionString += "GL_OES_standard_derivatives ";
+    }
 
     if (supportsFloat16Textures())
     {

src/libGLESv2/Context.h

@@ -509,6 +509,7 @@ class Context
     bool supportsNonPower2Texture() const;
     bool supportsInstancing() const;
     bool supportsTextureFilterAnisotropy() const;
+    bool supportsDerivativeInstructions() const;
 
     bool getCurrentReadFormatType(GLenum *format, GLenum *type);
 
@@ -645,6 +646,7 @@ class Context
     bool mSupportsDepthTextures;
     bool mSupports32bitIndices;
     bool mSupportsTextureFilterAnisotropy;
+    bool mSupportsDerivativeInstructions;
     int mNumCompressedTextureFormats;
 
     // state caching flags

src/libGLESv2/Shader.cpp

@@ -235,7 +235,7 @@ void Shader::initializeCompiler()
             resources.MaxTextureImageUnits = MAX_TEXTURE_IMAGE_UNITS;
             resources.MaxFragmentUniformVectors = context->getMaximumFragmentUniformVectors();
             resources.MaxDrawBuffers = MAX_DRAW_BUFFERS;
-            resources.OES_standard_derivatives = 1;
+            resources.OES_standard_derivatives = context->supportsDerivativeInstructions() ? 1 : 0;
             // resources.OES_EGL_image_external = getDisplay()->isD3d9ExDevice() ? 1 : 0; // TODO: commented out until the extension is actually supported.
 
             mFragmentCompiler = ShConstructCompiler(SH_FRAGMENT_SHADER, SH_GLES2_SPEC, SH_HLSL_OUTPUT, &resources);