Add support for querying gl_DepthRange as an active uniform via GetActiveUniform.

src/compiler/OutputHLSL.cpp

@@ -844,6 +844,11 @@ void OutputHLSL::header()
         out << "#define GL_USES_POINT_SIZE\n";
     }
 
+    if (mUsesDepthRange)
+    {
+        out << "#define GL_USES_DEPTH_RANGE\n";
+    }
+
     if (mUsesXor)
     {
         out << "bool xor(bool p, bool q)\n"

src/libGLESv2/ProgramBinary.cpp

@@ -1960,6 +1960,14 @@ bool ProgramBinary::link(InfoLog &infoLog, const AttributeBindings &attributeBin
         success = false;
     }
 
+    // special case for gl_DepthRange, the only built-in uniform (also a struct)
+    if (vertexShader->mUsesDepthRange || fragmentShader->mUsesDepthRange)
+    {
+        mUniforms.push_back(new Uniform(GL_FLOAT, GL_HIGH_FLOAT, "gl_DepthRange.near", 0));
+        mUniforms.push_back(new Uniform(GL_FLOAT, GL_HIGH_FLOAT, "gl_DepthRange.far", 0));
+        mUniforms.push_back(new Uniform(GL_FLOAT, GL_HIGH_FLOAT, "gl_DepthRange.diff", 0));
+    }
+
     return success;
 }
 

src/libGLESv2/Shader.cpp

@@ -304,6 +304,7 @@ void Shader::parseVaryings()
         mUsesFrontFacing = strstr(mHlsl, "GL_USES_FRONT_FACING") != NULL;
         mUsesPointSize = strstr(mHlsl, "GL_USES_POINT_SIZE") != NULL;
         mUsesPointCoord = strstr(mHlsl, "GL_USES_POINT_COORD") != NULL;
+        mUsesDepthRange = strstr(mHlsl, "GL_USES_DEPTH_RANGE") != NULL;
     }
 }
 
@@ -335,6 +336,7 @@ void Shader::uncompile()
     mUsesFrontFacing = false;
     mUsesPointSize = false;
     mUsesPointCoord = false;
+    mUsesDepthRange = false;
 
     mActiveUniforms.clear();
 }

src/libGLESv2/Shader.h

@@ -105,6 +105,7 @@ class Shader
     bool mUsesFrontFacing;
     bool mUsesPointSize;
     bool mUsesPointCoord;
+    bool mUsesDepthRange;
 
     static void *mFragmentCompiler;
     static void *mVertexCompiler;